From ef31d15fb1f66b4a68e51f455778aefb639ebc6a Mon Sep 17 00:00:00 2001
From: Richard Watts <richard@zilliqa.com>
Date: Fri, 30 Aug 2024 10:56:34 +0100
Subject: [PATCH 1/4] (feat) Block following mode for when ZQ1 loses access to
 eth_getLogs() (fix)  Fix history replays (feat) Legacy gas estimation overage
 mode - for preventing subtransactions from reverting due to lack of gas.

---
 .gitignore                                 |    1 +
 bridge-validators/.gitignore               |    1 +
 bridge-validators/Cargo.lock               | 1438 ++++++++++----------
 bridge-validators/README.md                |   31 +-
 bridge-validators/config.toml              |   33 +-
 bridge-validators/infra/config-leader.toml |    5 +-
 bridge-validators/infra/config.toml        |    5 +-
 bridge-validators/src/block.rs             |  215 ++-
 bridge-validators/src/bridge_node.rs       |   32 +-
 bridge-validators/src/client.rs            |   40 +-
 bridge-validators/src/main.rs              |    9 +-
 bridge-validators/src/message.rs           |    1 +
 bridge-validators/src/p2p_node.rs          |   39 +-
 bridge-validators/src/validator_node.rs    |   23 +-
 14 files changed, 1050 insertions(+), 823 deletions(-)
 create mode 100644 bridge-validators/.gitignore

diff --git a/.gitignore b/.gitignore
index 23d4a5e..2185bf6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,3 +9,4 @@ Debug/
 
 .trunk/**
 !.trunk/trunk.yaml
+**/.env
diff --git a/bridge-validators/.gitignore b/bridge-validators/.gitignore
new file mode 100644
index 0000000..2f7896d
--- /dev/null
+++ b/bridge-validators/.gitignore
@@ -0,0 +1 @@
+target/
diff --git a/bridge-validators/Cargo.lock b/bridge-validators/Cargo.lock
index 22f960a..0b3345a 100644
--- a/bridge-validators/Cargo.lock
+++ b/bridge-validators/Cargo.lock
@@ -14,9 +14,9 @@ dependencies = [
 
 [[package]]
 name = "addr2line"
-version = "0.21.0"
+version = "0.22.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8a30b2e23b9e17a9f90641c7ab1549cd9b44f296d3ccbf309d2863cfe398a0cb"
+checksum = "6e4503c46a5c0c7844e948c9a4d6acd9f50cccb4de1c48eb9e291ea17470c678"
 dependencies = [
  "gimli",
 ]
@@ -39,9 +39,9 @@ dependencies = [
 
 [[package]]
 name = "aes"
-version = "0.8.3"
+version = "0.8.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ac1f845298e95f983ff1944b728ae08b8cebab80d684f0a832ed0fc74dfa27e2"
+checksum = "b169f7a6d4742236a0a00c541b845991d0ac43e546831af1249753ab4c3aa3a0"
 dependencies = [
  "cfg-if",
  "cipher",
@@ -64,74 +64,75 @@ dependencies = [
 
 [[package]]
 name = "ahash"
-version = "0.8.6"
+version = "0.8.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "91429305e9f0a25f6205c5b8e0d2db09e0708a7a6df0f42212bb56c32c8ac97a"
+checksum = "e89da841a80418a9b391ebaea17f5c112ffaaa96f621d2c285b5174da76b9011"
 dependencies = [
  "cfg-if",
  "once_cell",
  "version_check",
- "zerocopy",
+ "zerocopy 0.7.35",
 ]
 
 [[package]]
 name = "aho-corasick"
-version = "1.1.2"
+version = "1.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b2969dcb958b36655471fc61f7e416fa76033bdd4bfed0678d8fee1e2d07a1f0"
+checksum = "8e60d3430d3a69478ad0993f19238d2df97c507009a52b3c10addcd7f6bcb916"
 dependencies = [
  "memchr",
 ]
 
 [[package]]
 name = "allocator-api2"
-version = "0.2.16"
+version = "0.2.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0942ffc6dcaadf03badf6e6a2d0228460359d5e34b57ccdc720b7382dfbd5ec5"
+checksum = "5c6cb57a04249c6480766f7f7cef5467412af1490f8d1e243141daddada3264f"
 
 [[package]]
 name = "anstream"
-version = "0.6.5"
+version = "0.6.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d664a92ecae85fd0a7392615844904654d1d5f5514837f471ddef4a057aba1b6"
+checksum = "64e15c1ab1f89faffbf04a634d5e1962e9074f2741eef6d97f3c4e322426d526"
 dependencies = [
  "anstyle",
  "anstyle-parse",
  "anstyle-query",
  "anstyle-wincon",
  "colorchoice",
+ "is_terminal_polyfill",
  "utf8parse",
 ]
 
 [[package]]
 name = "anstyle"
-version = "1.0.4"
+version = "1.0.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7079075b41f533b8c61d2a4d073c4676e1f8b249ff94a393b0595db304e0dd87"
+checksum = "1bec1de6f59aedf83baf9ff929c98f2ad654b97c9510f4e70cf6f661d49fd5b1"
 
 [[package]]
 name = "anstyle-parse"
-version = "0.2.3"
+version = "0.2.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c75ac65da39e5fe5ab759307499ddad880d724eed2f6ce5b5e8a26f4f387928c"
+checksum = "eb47de1e80c2b463c735db5b217a0ddc39d612e7ac9e2e96a5aed1f57616c1cb"
 dependencies = [
  "utf8parse",
 ]
 
 [[package]]
 name = "anstyle-query"
-version = "1.0.2"
+version = "1.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e28923312444cdd728e4738b3f9c9cac739500909bb3d3c94b43551b16517648"
+checksum = "6d36fc52c7f6c869915e99412912f22093507da8d9e942ceaf66fe4b7c14422a"
 dependencies = [
  "windows-sys 0.52.0",
 ]
 
 [[package]]
 name = "anstyle-wincon"
-version = "3.0.2"
+version = "3.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1cd54b81ec8d6180e24654d0b371ad22fc3dd083b6ff8ba325b72e00c87660a7"
+checksum = "5bf74e1b6e971609db8ca7a9ce79fd5768ab6ae46441c572e46cf596f59e57f8"
 dependencies = [
  "anstyle",
  "windows-sys 0.52.0",
@@ -139,18 +140,18 @@ dependencies = [
 
 [[package]]
 name = "anyhow"
-version = "1.0.75"
+version = "1.0.86"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a4668cab20f66d8d020e1fbc0ebe47217433c1b6c8f2040faf858554e394ace6"
+checksum = "b3d1d046238990b9cf5bcde22a3fb3584ee5cf65fb2765f454ed428c7a0063da"
 dependencies = [
  "backtrace",
 ]
 
 [[package]]
 name = "arrayref"
-version = "0.3.7"
+version = "0.3.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6b4930d2cb77ce62f89ee5d5289b4ac049559b1c45539271f5ed4fdc7db34545"
+checksum = "9d151e35f61089500b617991b791fc8bfd237ae50cd5950803758a179b41e67a"
 
 [[package]]
 name = "arrayvec"
@@ -169,9 +170,9 @@ dependencies = [
 
 [[package]]
 name = "asn1-rs"
-version = "0.5.2"
+version = "0.6.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7f6fd5ddaf0351dff5b8da21b2fb4ff8e08ddd02857f0bf69c47639106c0fff0"
+checksum = "5493c3bedbacf7fd7382c6346bbd66687d12bbaad3a89a2d2c303ee6cf20b048"
 dependencies = [
  "asn1-rs-derive",
  "asn1-rs-impl",
@@ -185,32 +186,32 @@ dependencies = [
 
 [[package]]
 name = "asn1-rs-derive"
-version = "0.4.0"
+version = "0.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "726535892e8eae7e70657b4c8ea93d26b8553afb1ce617caee529ef96d7dee6c"
+checksum = "965c2d33e53cb6b267e148a4cb0760bc01f4904c1cd4bb4002a085bb016d1490"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 1.0.109",
+ "syn 2.0.72",
  "synstructure",
 ]
 
 [[package]]
 name = "asn1-rs-impl"
-version = "0.1.0"
+version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2777730b2039ac0f95f093556e61b6d26cebed5393ca6f152717777cec3a42ed"
+checksum = "7b18050c2cd6fe86c3a76584ef5e0baf286d038cda203eb6223df2cc413565f7"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 1.0.109",
+ "syn 2.0.72",
 ]
 
 [[package]]
 name = "async-io"
-version = "2.2.2"
+version = "2.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6afaa937395a620e33dc6a742c593c01aced20aa376ffb0f628121198578ccc7"
+checksum = "0d6baa8f0178795da0e71bc42c9e5d13261aac7ee549853162e66a241ba17964"
 dependencies = [
  "async-lock",
  "cfg-if",
@@ -227,9 +228,9 @@ dependencies = [
 
 [[package]]
 name = "async-lock"
-version = "3.2.0"
+version = "3.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7125e42787d53db9dd54261812ef17e937c95a51e4d291373b670342fa44310c"
+checksum = "ff6e472cdea888a4bd64f342f09b3f50e1886d32afe8df3d663c01140b811b18"
 dependencies = [
  "event-listener",
  "event-listener-strategy",
@@ -255,18 +256,18 @@ checksum = "16e62a023e7c117e27523144c5d2459f4397fcc3cab0085af8e2224f643a0193"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.48",
+ "syn 2.0.72",
 ]
 
 [[package]]
 name = "async-trait"
-version = "0.1.77"
+version = "0.1.81"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c980ee35e870bd1a4d2c8294d4c04d0499e67bca1e4b5cefcc693c2fa00caea9"
+checksum = "6e0c28dcc82d7c8ead5cb13beb15405b57b8546e93215673ff8ca0349a028107"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.48",
+ "syn 2.0.72",
 ]
 
 [[package]]
@@ -306,27 +307,26 @@ dependencies = [
 
 [[package]]
 name = "auto_impl"
-version = "1.1.0"
+version = "1.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fee3da8ef1276b0bee5dd1c7258010d8fffd31801447323115a25560e1327b89"
+checksum = "3c87f3f15e7794432337fc718554eaa4dc8f04c9677a950ffe366f20a162ae42"
 dependencies = [
- "proc-macro-error",
  "proc-macro2",
  "quote",
- "syn 1.0.109",
+ "syn 2.0.72",
 ]
 
 [[package]]
 name = "autocfg"
-version = "1.1.0"
+version = "1.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
+checksum = "0c4b4d0bd25bd0b74681c0ad21497610ce1b7c91b1022cd21c80c6fbdd9476b0"
 
 [[package]]
 name = "backtrace"
-version = "0.3.69"
+version = "0.3.73"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2089b7e3f35b9dd2d0ed921ead4f6d318c27680d4a5bd167b3ee120edb105837"
+checksum = "5cc23269a4f8976d0a4d2e7109211a419fe30e8d88d677cd60b6bc79c5732e0a"
 dependencies = [
  "addr2line",
  "cc",
@@ -357,9 +357,15 @@ checksum = "9e1b586273c5702936fe7b7d6896644d8be71e6314cfe09d3167c95f712589e8"
 
 [[package]]
 name = "base64"
-version = "0.21.5"
+version = "0.21.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "35636a1494ede3b646cc98f74f8e62c773a38a659ebc777a2cf26b9b74171df9"
+checksum = "9d297deb1925b89f2ccc13d7635fa0714f12c87adce1c75356b39ca9b7178567"
+
+[[package]]
+name = "base64"
+version = "0.22.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "72b3254f16251a8381aa12e40e3c4d2f0199f8c6508fbecb9d91f575e0fbb8c6"
 
 [[package]]
 name = "base64ct"
@@ -396,9 +402,9 @@ checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
 
 [[package]]
 name = "bitflags"
-version = "2.4.1"
+version = "2.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "327762f6e5a765692301e5bb513e0d9fef63be86bbc14528052b1cd3e6f03e07"
+checksum = "b048fb63fd8b5923fc5aa7b340d8e156aec7ec02f0c78fa8a6ddc2613f6f71de"
 
 [[package]]
 name = "bitvec"
@@ -453,9 +459,9 @@ dependencies = [
 
 [[package]]
 name = "bs58"
-version = "0.5.0"
+version = "0.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f5353f36341f7451062466f0b755b96ac3a9547e4d7f6b70d603fc721a7d7896"
+checksum = "bf88ba1141d185c399bee5288d850d63b8369520c1eafc32a0430b5b6c287bf4"
 dependencies = [
  "sha2",
  "tinyvec",
@@ -463,9 +469,9 @@ dependencies = [
 
 [[package]]
 name = "bumpalo"
-version = "3.14.0"
+version = "3.16.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7f30e7476521f6f8af1a1c4c0b8cc94f0bee37d91763d0ca2665f299b6cd8aec"
+checksum = "79296716171880943b8470b5f8d03aa55eb2e645a4874bdbb28adb49162e012c"
 
 [[package]]
 name = "byte-slice-cast"
@@ -481,9 +487,9 @@ checksum = "1fd0f2584146f6f2ef48085050886acf353beff7305ebd1ae69500e27c67f64b"
 
 [[package]]
 name = "bytes"
-version = "1.5.0"
+version = "1.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a2bd12c1caf447e69cd4528f47f94d203fd2582878ecb9e9465484c4148a8223"
+checksum = "fca2be1d5c43812bae364ee3f30b3afcb7877cf59f4aeb94c66f313a41d2fac9"
 dependencies = [
  "serde",
 ]
@@ -511,18 +517,18 @@ dependencies = [
 
 [[package]]
 name = "camino"
-version = "1.1.6"
+version = "1.1.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c59e92b5a388f549b863a7bea62612c09f24c8393560709a54558a9abdfb3b9c"
+checksum = "e0ec6b951b160caa93cc0c7b209e5a3bff7aae9062213451ac99493cd844c239"
 dependencies = [
  "serde",
 ]
 
 [[package]]
 name = "cargo-platform"
-version = "0.1.5"
+version = "0.1.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e34637b3140142bdf929fb439e8aa4ebad7651ebf7b1080b3930aa16ac1459ff"
+checksum = "24b1f0365a6c6bb4020cd05806fd0d33c44d38046b8bd7f0e40814b9763cabfc"
 dependencies = [
  "serde",
 ]
@@ -543,9 +549,9 @@ dependencies = [
 
 [[package]]
 name = "cc"
-version = "1.0.83"
+version = "1.1.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f1174fb0b6ec23863f8b971027804a42614e347eafb0a95bf0b12cdae21fc4d0"
+checksum = "26a5c3fd7bfa1ce3897a3a3501d362b2d87b7f2583ebcb4a949ec25911025cbc"
 dependencies = [
  "jobserver",
  "libc",
@@ -583,9 +589,9 @@ dependencies = [
 
 [[package]]
 name = "chrono"
-version = "0.4.31"
+version = "0.4.38"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7f2c685bad3eb3d45a01354cedb7d5faa66194d1d58ba6e267a8de788f79db38"
+checksum = "a21f936df1771bf62b77f047b726c4625ff2e8aa607c01ec06e5a05bd8463401"
 dependencies = [
  "num-traits",
 ]
@@ -603,9 +609,9 @@ dependencies = [
 
 [[package]]
 name = "clap"
-version = "4.4.11"
+version = "4.5.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bfaff671f6b22ca62406885ece523383b9b64022e341e53e009a62ebc47a45f2"
+checksum = "0fbb260a053428790f3de475e304ff84cdbc4face759ea7a3e64c1edd938a7fc"
 dependencies = [
  "clap_builder",
  "clap_derive",
@@ -613,9 +619,9 @@ dependencies = [
 
 [[package]]
 name = "clap_builder"
-version = "4.4.11"
+version = "4.5.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a216b506622bb1d316cd51328dce24e07bdff4a6128a47c7e7fad11878d5adbb"
+checksum = "64b17d7ea74e9f833c7dbf2cbe4fb12ff26783eda4782a8975b72f895c9b4d99"
 dependencies = [
  "anstream",
  "anstyle",
@@ -625,21 +631,21 @@ dependencies = [
 
 [[package]]
 name = "clap_derive"
-version = "4.4.7"
+version = "4.5.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cf9804afaaf59a91e75b022a30fb7229a7901f60c755489cc61c9b423b836442"
+checksum = "501d359d5f3dcaf6ecdeee48833ae73ec6e42723a1e52419c79abf9507eec0a0"
 dependencies = [
- "heck",
+ "heck 0.5.0",
  "proc-macro2",
  "quote",
- "syn 2.0.48",
+ "syn 2.0.72",
 ]
 
 [[package]]
 name = "clap_lex"
-version = "0.6.0"
+version = "0.7.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "702fc72eb24e5a1e48ce58027a675bc24edd52096d5397d4aea7c6dd9eca0bd1"
+checksum = "1462739cb27611015575c0c11df5df7601141071f07518d56fcc1be504cbec97"
 
 [[package]]
 name = "coins-bip32"
@@ -679,7 +685,7 @@ version = "0.8.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5286a0843c21f8367f7be734f89df9b822e0321d8bcce8d6e735aadff7d74979"
 dependencies = [
- "base64 0.21.5",
+ "base64 0.21.7",
  "bech32",
  "bs58",
  "digest",
@@ -695,24 +701,24 @@ dependencies = [
 
 [[package]]
 name = "colorchoice"
-version = "1.0.0"
+version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "acbf1af155f9b9ef647e42cdc158db4b64a1b61f743629225fde6f3e0be2a7c7"
+checksum = "d3fd119d74b830634cea2a0f58bbd0d54540518a14397557951e79340abc28c0"
 
 [[package]]
 name = "concurrent-queue"
-version = "2.4.0"
+version = "2.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d16048cd947b08fa32c24458a22f5dc5e835264f689f4f5653210c69fd107363"
+checksum = "4ca0197aee26d1ae37445ee532fefce43251d24cc7c166799f4d46817f1d3973"
 dependencies = [
  "crossbeam-utils",
 ]
 
 [[package]]
 name = "const-hex"
-version = "1.10.0"
+version = "1.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a5104de16b218eddf8e34ffe2f86f74bfa4e61e95a1b89732fccf6325efd0557"
+checksum = "94fb8a24a26d37e1ffd45343323dc9fe6654ceea44c12f2fcb3d7ac29e610bc6"
 dependencies = [
  "cfg-if",
  "cpufeatures",
@@ -723,9 +729,9 @@ dependencies = [
 
 [[package]]
 name = "const-oid"
-version = "0.9.5"
+version = "0.9.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "28c122c3980598d243d63d9a704629a2d748d101f278052ff068be5a4423ab6f"
+checksum = "c2459377285ad874054d797f3ccebf984978aa39129f6eafde5cdc8315b612f8"
 
 [[package]]
 name = "constant_time_eq"
@@ -760,53 +766,46 @@ dependencies = [
 
 [[package]]
 name = "cpufeatures"
-version = "0.2.11"
+version = "0.2.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ce420fe07aecd3e67c5f910618fe65e94158f6dcc0adf44e00d69ce2bdfe0fd0"
+checksum = "53fe5e26ff1b7aef8bca9c6080520cfb8d9333c7568e1829cef191a9723e5504"
 dependencies = [
  "libc",
 ]
 
 [[package]]
 name = "crc32fast"
-version = "1.3.2"
+version = "1.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b540bd8bc810d3885c6ea91e2018302f68baba2129ab3e88f32389ee9370880d"
+checksum = "a97769d94ddab943e4510d138150169a2758b5ef3eb191a9ee688de3e23ef7b3"
 dependencies = [
  "cfg-if",
 ]
 
 [[package]]
 name = "crossbeam-deque"
-version = "0.8.4"
+version = "0.8.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fca89a0e215bab21874660c67903c5f143333cab1da83d041c7ded6053774751"
+checksum = "613f8cc01fe9cf1a3eb3d7f488fd2fa8388403e97039e2f73692932e291a770d"
 dependencies = [
- "cfg-if",
  "crossbeam-epoch",
  "crossbeam-utils",
 ]
 
 [[package]]
 name = "crossbeam-epoch"
-version = "0.9.16"
+version = "0.9.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2d2fe95351b870527a5d09bf563ed3c97c0cffb87cf1c78a591bf48bb218d9aa"
+checksum = "5b82ac4a3c2ca9c3460964f020e1402edd5753411d7737aa39c3714ad1b5420e"
 dependencies = [
- "autocfg",
- "cfg-if",
  "crossbeam-utils",
- "memoffset",
 ]
 
 [[package]]
 name = "crossbeam-utils"
-version = "0.8.17"
+version = "0.8.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c06d96137f14f244c37f989d9fff8f95e6c18b918e71f36638f8c49112e4c78f"
-dependencies = [
- "cfg-if",
-]
+checksum = "22ec99545bb0ed0ea7bb9b8e1e9122ea386ff8a48c0922e43f36d45ab09e0e80"
 
 [[package]]
 name = "crunchy"
@@ -848,16 +847,15 @@ dependencies = [
 
 [[package]]
 name = "curve25519-dalek"
-version = "4.1.1"
+version = "4.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e89b8c6a2e4b1f45971ad09761aafb85514a84744b67a95e32c3cc1352d1f65c"
+checksum = "97fb8b7c4503de7d6ae7b42ab72a5a59857b4c937ec27a3d4539dba95b5ab2be"
 dependencies = [
  "cfg-if",
  "cpufeatures",
  "curve25519-dalek-derive",
  "digest",
  "fiat-crypto",
- "platforms",
  "rustc_version",
  "subtle",
  "zeroize",
@@ -871,20 +869,20 @@ checksum = "f46882e17999c6cc590af592290432be3bce0428cb0d5f8b6715e4dc7b383eb3"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.48",
+ "syn 2.0.72",
 ]
 
 [[package]]
 name = "data-encoding"
-version = "2.5.0"
+version = "2.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7e962a19be5cfc3f3bf6dd8f61eb50107f356ad6270fbb3ed41476571db78be5"
+checksum = "e8566979429cf69b49a5c740c60791108e86440e8be149bbea4fe54d2c32d6e2"
 
 [[package]]
 name = "data-encoding-macro"
-version = "0.1.14"
+version = "0.1.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "20c01c06f5f429efdf2bae21eb67c28b3df3cf85b7dd2d8ef09c0838dac5d33e"
+checksum = "f1559b6cba622276d6d63706db152618eeb15b89b3e4041446b05876e352e639"
 dependencies = [
  "data-encoding",
  "data-encoding-macro-internal",
@@ -892,9 +890,9 @@ dependencies = [
 
 [[package]]
 name = "data-encoding-macro-internal"
-version = "0.1.12"
+version = "0.1.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0047d07f2c89b17dd631c80450d69841a6b5d7fb17278cbc43d7e4cfcf2576f3"
+checksum = "332d754c0af53bc87c108fed664d121ecf59207ec4196041f04d6ab9002ad33f"
 dependencies = [
  "data-encoding",
  "syn 1.0.109",
@@ -902,9 +900,9 @@ dependencies = [
 
 [[package]]
 name = "der"
-version = "0.7.8"
+version = "0.7.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fffa369a668c8af7dbf8b5e56c9f744fbd399949ed171606040001947de40b1c"
+checksum = "f55bf8e7b65898637379c1b74eb1551107c8294ed26d855ceb9fd1a09cfc9bc0"
 dependencies = [
  "const-oid",
  "zeroize",
@@ -912,9 +910,9 @@ dependencies = [
 
 [[package]]
 name = "der-parser"
-version = "8.2.0"
+version = "9.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dbd676fbbab537128ef0278adb5576cf363cff6aa22a7b24effe97347cfab61e"
+checksum = "5cd0a5c643689626bec213c4d8bd4d96acc8ffdb4ad4bb6bc16abf27d5f4b553"
 dependencies = [
  "asn1-rs",
  "displaydoc",
@@ -926,30 +924,24 @@ dependencies = [
 
 [[package]]
 name = "deranged"
-version = "0.3.10"
+version = "0.3.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8eb30d70a07a3b04884d2677f06bec33509dc67ca60d92949e5535352d3191dc"
+checksum = "b42b6fa04a440b495c8b04d0e71b707c585f83cb9cb28cf8cd0d976c315e31b4"
 dependencies = [
  "powerfmt",
 ]
 
 [[package]]
 name = "derive_more"
-version = "0.99.17"
+version = "0.99.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4fb810d30a7c1953f91334de7244731fc3f3c10d7fe163338a35b9f640960321"
+checksum = "5f33878137e4dafd7fa914ad4e259e18a4e8e532b9617a2d0150262bf53abfce"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 1.0.109",
+ "syn 2.0.72",
 ]
 
-[[package]]
-name = "diff"
-version = "0.1.13"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "56254986775e3233ffa9c4d7d3faaf6d36a2c09d30b20687e9f88bc8bafc16c8"
-
 [[package]]
 name = "digest"
 version = "0.10.7"
@@ -1006,13 +998,13 @@ dependencies = [
 
 [[package]]
 name = "displaydoc"
-version = "0.2.4"
+version = "0.2.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "487585f4d0c6655fe74905e2504d8ad6908e4db67f744eb140876906c2f3175d"
+checksum = "97369cbbc041bc366949bc74d34658d6cda5621039731c6310521892a3a20ae0"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.48",
+ "syn 2.0.72",
 ]
 
 [[package]]
@@ -1053,9 +1045,9 @@ dependencies = [
 
 [[package]]
 name = "ed25519-dalek"
-version = "2.1.0"
+version = "2.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1f628eaec48bfd21b865dc2950cfa014450c01d2fa2b69a86c2fd5844ec523c0"
+checksum = "4a3daa8e81a3963a60642bcc1f90a670680bd4a77535faa384e9d1c79d620871"
 dependencies = [
  "curve25519-dalek",
  "ed25519",
@@ -1068,9 +1060,9 @@ dependencies = [
 
 [[package]]
 name = "either"
-version = "1.9.0"
+version = "1.13.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a26ae43d7bcc3b814de94796a5e736d4029efb0ee900c12e2d54c993ad1a1e07"
+checksum = "60b1af1c220855b6ceac025d3f6ecdd2b7c4894bfe9cd9bda4fbb4bc7c0d4cf0"
 
 [[package]]
 name = "elliptic-curve"
@@ -1093,29 +1085,29 @@ dependencies = [
 
 [[package]]
 name = "ena"
-version = "0.14.2"
+version = "0.14.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c533630cf40e9caa44bd91aadc88a75d75a4c3a12b4cfde353cbed41daa1e1f1"
+checksum = "3d248bdd43ce613d87415282f69b9bb99d947d290b10962dd6c56233312c2ad5"
 dependencies = [
  "log",
 ]
 
 [[package]]
 name = "encoding_rs"
-version = "0.8.33"
+version = "0.8.34"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7268b386296a025e474d5140678f75d6de9493ae55a5d709eeb9dd08149945e1"
+checksum = "b45de904aa0b010bce2ab45264d0631681847fa7b6f2eaa7dab7619943bc4f59"
 dependencies = [
  "cfg-if",
 ]
 
 [[package]]
 name = "enr"
-version = "0.9.1"
+version = "0.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fe81b5c06ecfdbc71dd845216f225f53b62a10cb8a16c946836a3467f701d05b"
+checksum = "2a3d8dc56e02f954cac8eb489772c552c473346fc34f67412bb6244fd647f7e4"
 dependencies = [
- "base64 0.21.5",
+ "base64 0.21.7",
  "bytes",
  "hex",
  "k256",
@@ -1133,10 +1125,10 @@ version = "0.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5ffccbb6966c05b32ef8fbac435df276c4ae4d3dc55a8cd0eb9745e6c12f546a"
 dependencies = [
- "heck",
+ "heck 0.4.1",
  "proc-macro2",
  "quote",
- "syn 2.0.48",
+ "syn 2.0.72",
 ]
 
 [[package]]
@@ -1147,9 +1139,9 @@ checksum = "5443807d6dff69373d433ab9ef5378ad8df50ca6298caf15de6e52e24aaf54d5"
 
 [[package]]
 name = "errno"
-version = "0.3.8"
+version = "0.3.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a258e46cdc063eb8519c00b9fc845fc47bcfca4130e2f08e88665ceda8474245"
+checksum = "534c5cf6194dfab3db3242765c03bbe257cf92f22b38f6bc0c58d59108a820ba"
 dependencies = [
  "libc",
  "windows-sys 0.52.0",
@@ -1227,9 +1219,9 @@ dependencies = [
 
 [[package]]
 name = "ethers"
-version = "2.0.11"
+version = "2.0.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1a5344eea9b20effb5efeaad29418215c4d27017639fd1f908260f59cbbd226e"
+checksum = "816841ea989f0c69e459af1cf23a6b0033b19a55424a1ea3a30099becdb8dec0"
 dependencies = [
  "ethers-addressbook",
  "ethers-contract",
@@ -1243,9 +1235,9 @@ dependencies = [
 
 [[package]]
 name = "ethers-addressbook"
-version = "2.0.11"
+version = "2.0.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8c405f24ea3a517899ba7985385c43dc4a7eb1209af3b1e0a1a32d7dcc7f8d09"
+checksum = "5495afd16b4faa556c3bba1f21b98b4983e53c1755022377051a975c3b021759"
 dependencies = [
  "ethers-core",
  "once_cell",
@@ -1255,9 +1247,9 @@ dependencies = [
 
 [[package]]
 name = "ethers-contract"
-version = "2.0.11"
+version = "2.0.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0111ead599d17a7bff6985fd5756f39ca7033edc79a31b23026a8d5d64fa95cd"
+checksum = "6fceafa3578c836eeb874af87abacfb041f92b4da0a78a5edd042564b8ecdaaa"
 dependencies = [
  "const-hex",
  "ethers-contract-abigen",
@@ -1274,9 +1266,9 @@ dependencies = [
 
 [[package]]
 name = "ethers-contract-abigen"
-version = "2.0.11"
+version = "2.0.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "51258120c6b47ea9d9bec0d90f9e8af71c977fbefbef8213c91bfed385fe45eb"
+checksum = "04ba01fbc2331a38c429eb95d4a570166781f14290ef9fdb144278a90b5a739b"
 dependencies = [
  "Inflector",
  "const-hex",
@@ -1291,16 +1283,16 @@ dependencies = [
  "reqwest",
  "serde",
  "serde_json",
- "syn 2.0.48",
+ "syn 2.0.72",
  "toml",
  "walkdir",
 ]
 
 [[package]]
 name = "ethers-contract-derive"
-version = "2.0.11"
+version = "2.0.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "936e7a0f1197cee2b62dc89f63eff3201dbf87c283ff7e18d86d38f83b845483"
+checksum = "87689dcabc0051cde10caaade298f9e9093d65f6125c14575db3fd8c669a168f"
 dependencies = [
  "Inflector",
  "const-hex",
@@ -1309,14 +1301,14 @@ dependencies = [
  "proc-macro2",
  "quote",
  "serde_json",
- "syn 2.0.48",
+ "syn 2.0.72",
 ]
 
 [[package]]
 name = "ethers-core"
-version = "2.0.11"
+version = "2.0.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2f03e0bdc216eeb9e355b90cf610ef6c5bb8aca631f97b5ae9980ce34ea7878d"
+checksum = "82d80cc6ad30b14a48ab786523af33b37f28a8623fc06afd55324816ef18fb1f"
 dependencies = [
  "arrayvec",
  "bytes",
@@ -1335,7 +1327,7 @@ dependencies = [
  "serde",
  "serde_json",
  "strum",
- "syn 2.0.48",
+ "syn 2.0.72",
  "tempfile",
  "thiserror",
  "tiny-keccak",
@@ -1344,9 +1336,9 @@ dependencies = [
 
 [[package]]
 name = "ethers-etherscan"
-version = "2.0.11"
+version = "2.0.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "abbac2c890bdbe0f1b8e549a53b00e2c4c1de86bb077c1094d1f38cdf9381a56"
+checksum = "e79e5973c26d4baf0ce55520bd732314328cabe53193286671b47144145b9649"
 dependencies = [
  "chrono",
  "ethers-core",
@@ -1360,9 +1352,9 @@ dependencies = [
 
 [[package]]
 name = "ethers-middleware"
-version = "2.0.11"
+version = "2.0.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "681ece6eb1d10f7cf4f873059a77c04ff1de4f35c63dd7bccde8f438374fcb93"
+checksum = "48f9fdf09aec667c099909d91908d5eaf9be1bd0e2500ba4172c1d28bfaa43de"
 dependencies = [
  "async-trait",
  "auto_impl",
@@ -1387,13 +1379,13 @@ dependencies = [
 
 [[package]]
 name = "ethers-providers"
-version = "2.0.11"
+version = "2.0.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "25d6c0c9455d93d4990c06e049abf9b30daf148cf461ee939c11d88907c60816"
+checksum = "6434c9a33891f1effc9c75472e12666db2fa5a0fec4b29af6221680a6fe83ab2"
 dependencies = [
  "async-trait",
  "auto_impl",
- "base64 0.21.5",
+ "base64 0.21.7",
  "bytes",
  "const-hex",
  "enr",
@@ -1425,9 +1417,9 @@ dependencies = [
 
 [[package]]
 name = "ethers-signers"
-version = "2.0.11"
+version = "2.0.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0cb1b714e227bbd2d8c53528adb580b203009728b17d0d0e4119353aa9bc5532"
+checksum = "228875491c782ad851773b652dd8ecac62cda8571d3bc32a5853644dd26766c2"
 dependencies = [
  "async-trait",
  "coins-bip32",
@@ -1444,9 +1436,9 @@ dependencies = [
 
 [[package]]
 name = "ethers-solc"
-version = "2.0.11"
+version = "2.0.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a64f710586d147864cff66540a6d64518b9ff37d73ef827fee430538265b595f"
+checksum = "66244a771d9163282646dbeffe0e6eca4dda4146b6498644e678ac6089b11edd"
 dependencies = [
  "cfg-if",
  "const-hex",
@@ -1476,9 +1468,9 @@ dependencies = [
 
 [[package]]
 name = "event-listener"
-version = "4.0.0"
+version = "5.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "770d968249b5d99410d61f5bf89057f3199a077a04d087092f58e7d10692baae"
+checksum = "6032be9bd27023a771701cc49f9f053c751055f71efb2e0ae5c15809093675ba"
 dependencies = [
  "concurrent-queue",
  "parking",
@@ -1487,9 +1479,9 @@ dependencies = [
 
 [[package]]
 name = "event-listener-strategy"
-version = "0.4.0"
+version = "0.5.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "958e4d70b6d5e81971bebec42271ec641e7ff4e170a6fa605f2b8a8b65cb97d3"
+checksum = "0f214dc438f977e6d4e3500aaa277f5ad94ca83fbbd9b1a15713ce2344ccc5a1"
 dependencies = [
  "event-listener",
  "pin-project-lite",
@@ -1497,9 +1489,9 @@ dependencies = [
 
 [[package]]
 name = "eyre"
-version = "0.6.9"
+version = "0.6.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "80f656be11ddf91bd709454d15d5bd896fbaf4cc3314e69349e4d1569f5b46cd"
+checksum = "7cd915d99f24784cdc19fd37ef22b97e3ff0ae756c7e492e9fbfe897d61e2aec"
 dependencies = [
  "indenter",
  "once_cell",
@@ -1507,9 +1499,9 @@ dependencies = [
 
 [[package]]
 name = "fastrand"
-version = "2.0.1"
+version = "2.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "25cbce373ec4653f1a01a31e8a5e5ec0c622dc27ff9c4e6606eefef5cbbed4a5"
+checksum = "9fc0510504f03c51ada170672ac806f1f105a88aa97a5281117e1ddc3368e51a"
 
 [[package]]
 name = "ff"
@@ -1523,9 +1515,9 @@ dependencies = [
 
 [[package]]
 name = "fiat-crypto"
-version = "0.2.5"
+version = "0.2.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "27573eac26f4dd11e2b1916c3fe1baa56407c83c71a773a8ba17ec0bca03b6b7"
+checksum = "28dea519a9695b9977216879a3ebfddf92f1c08c05d984f8996aecd6ecdc811d"
 
 [[package]]
 name = "fixed-hash"
@@ -1547,9 +1539,9 @@ checksum = "0ce7134b9999ecaf8bcd65542e436736ef32ddca1b3e06094cb6ec5755203b80"
 
 [[package]]
 name = "flate2"
-version = "1.0.28"
+version = "1.0.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "46303f565772937ffe1d394a4fac6f411c6013172fadde9dcdb1e147a086940e"
+checksum = "5f54427cfd1c7829e2a139fcefea601bf088ebca651d2bf53ebc600eac295dae"
 dependencies = [
  "crc32fast",
  "miniz_oxide",
@@ -1588,9 +1580,9 @@ checksum = "e6d5a32815ae3f33302d95fdcb2ce17862f8c65363dcfd29360480ba1001fc9c"
 
 [[package]]
 name = "futures"
-version = "0.3.29"
+version = "0.3.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "da0290714b38af9b4a7b094b8a37086d1b4e61f2df9122c3cad2577669145335"
+checksum = "645c6916888f6cb6350d2550b80fb63e734897a8498abe35cfb732b6487804b0"
 dependencies = [
  "futures-channel",
  "futures-core",
@@ -1603,9 +1595,9 @@ dependencies = [
 
 [[package]]
 name = "futures-bounded"
-version = "0.2.3"
+version = "0.2.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e1e2774cc104e198ef3d3e1ff4ab40f86fa3245d6cb6a3a46174f21463cee173"
+checksum = "91f328e7fb845fc832912fb6a34f40cf6d1888c92f974d1893a54e97b5ff542e"
 dependencies = [
  "futures-timer",
  "futures-util",
@@ -1613,9 +1605,9 @@ dependencies = [
 
 [[package]]
 name = "futures-channel"
-version = "0.3.29"
+version = "0.3.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ff4dd66668b557604244583e3e1e1eada8c5c2e96a6d0d6653ede395b78bbacb"
+checksum = "eac8f7d7865dcb88bd4373ab671c8cf4508703796caa2b1985a9ca867b3fcb78"
 dependencies = [
  "futures-core",
  "futures-sink",
@@ -1623,15 +1615,15 @@ dependencies = [
 
 [[package]]
 name = "futures-core"
-version = "0.3.29"
+version = "0.3.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "eb1d22c66e66d9d72e1758f0bd7d4fd0bee04cad842ee34587d68c07e45d088c"
+checksum = "dfc6580bb841c5a68e9ef15c77ccc837b40a7504914d52e47b8b0e9bbda25a1d"
 
 [[package]]
 name = "futures-executor"
-version = "0.3.29"
+version = "0.3.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0f4fb8693db0cf099eadcca0efe2a5a22e4550f98ed16aba6c48700da29597bc"
+checksum = "a576fc72ae164fca6b9db127eaa9a9dda0d61316034f33a0a0d4eda41f02b01d"
 dependencies = [
  "futures-core",
  "futures-task",
@@ -1641,15 +1633,15 @@ dependencies = [
 
 [[package]]
 name = "futures-io"
-version = "0.3.29"
+version = "0.3.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8bf34a163b5c4c52d0478a4d757da8fb65cabef42ba90515efee0f6f9fa45aaa"
+checksum = "a44623e20b9681a318efdd71c299b6b222ed6f231972bfe2f224ebad6311f0c1"
 
 [[package]]
 name = "futures-lite"
-version = "2.1.0"
+version = "2.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "aeee267a1883f7ebef3700f262d2d54de95dfaf38189015a74fdc4e0c7ad8143"
+checksum = "52527eb5074e35e9339c6b4e8d12600c7128b68fb25dcb9fa9dec18f7c25f3a5"
 dependencies = [
  "futures-core",
  "pin-project-lite",
@@ -1667,36 +1659,37 @@ dependencies = [
 
 [[package]]
 name = "futures-macro"
-version = "0.3.29"
+version = "0.3.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "53b153fd91e4b0147f4aced87be237c98248656bb01050b96bf3ee89220a8ddb"
+checksum = "87750cf4b7a4c0625b1529e4c543c2182106e4dedc60a2a6455e00d212c489ac"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.48",
+ "syn 2.0.72",
 ]
 
 [[package]]
 name = "futures-rustls"
-version = "0.24.0"
+version = "0.26.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "35bd3cf68c183738046838e300353e4716c674dc5e56890de4826801a6622a28"
+checksum = "a8f2f12607f92c69b12ed746fabf9ca4f5c482cba46679c1a75b874ed7c26adb"
 dependencies = [
  "futures-io",
- "rustls",
+ "rustls 0.23.12",
+ "rustls-pki-types",
 ]
 
 [[package]]
 name = "futures-sink"
-version = "0.3.29"
+version = "0.3.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e36d3378ee38c2a36ad710c5d30c2911d752cb941c00c72dbabfb786a7970817"
+checksum = "9fb8e00e87438d937621c1c6269e53f536c14d3fbd6a042bb24879e57d474fb5"
 
 [[package]]
 name = "futures-task"
-version = "0.3.29"
+version = "0.3.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "efd193069b0ddadc69c46389b740bbccdd97203899b48d09c5f7969591d6bae2"
+checksum = "38d84fa142264698cdce1a9f9172cf383a0c82de1bddcf3092901442c4097004"
 
 [[package]]
 name = "futures-ticker"
@@ -1711,9 +1704,9 @@ dependencies = [
 
 [[package]]
 name = "futures-timer"
-version = "3.0.2"
+version = "3.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e64b03909df88034c26dc1547e8970b91f98bdb65165d6a4e9110d94263dbb2c"
+checksum = "f288b0a4f20f9a56b5d1da57e2227c661b7b16168e2f72365f57b63326e29b24"
 dependencies = [
  "gloo-timers",
  "send_wrapper 0.4.0",
@@ -1721,9 +1714,9 @@ dependencies = [
 
 [[package]]
 name = "futures-util"
-version = "0.3.29"
+version = "0.3.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a19526d624e703a3179b3d322efec918b6246ea0fa51d41124525f00f1cc8104"
+checksum = "3d6401deb83407ab3da39eba7e33987a73c3df0c82b4bb5813ee871c19c41d48"
 dependencies = [
  "futures-channel",
  "futures-core",
@@ -1759,9 +1752,9 @@ dependencies = [
 
 [[package]]
 name = "getrandom"
-version = "0.2.11"
+version = "0.2.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fe9006bed769170c11f845cf00c7c1e9092aeb3f268e007c3e760ac68008070f"
+checksum = "c4567c8db10ae91089c99af84c68c38da3ec2f087c3f82960bcdbf3656b6f4d7"
 dependencies = [
  "cfg-if",
  "libc",
@@ -1770,9 +1763,9 @@ dependencies = [
 
 [[package]]
 name = "ghash"
-version = "0.5.0"
+version = "0.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d930750de5717d2dd0b8c0d42c076c0e884c81a73e6cab859bbd2339c71e3e40"
+checksum = "f0d8a4362ccb29cb0b265253fb0a2728f592895ee6854fd9bc13f2ffda266ff1"
 dependencies = [
  "opaque-debug",
  "polyval",
@@ -1780,9 +1773,9 @@ dependencies = [
 
 [[package]]
 name = "gimli"
-version = "0.28.1"
+version = "0.29.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4271d37baee1b8c7e4b708028c57d816cf9d2434acb33a549475f78c181f6253"
+checksum = "40ecd4077b5ae9fd2e9e169b102c6c330d0605168eb0e8bf79952b256dbefffd"
 
 [[package]]
 name = "glob"
@@ -1815,9 +1808,9 @@ dependencies = [
 
 [[package]]
 name = "h2"
-version = "0.3.24"
+version = "0.3.26"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bb2c4422095b67ee78da96fbb51a4cc413b3b25883c7717ff7ca1ab31022c9c9"
+checksum = "81fe527a889e1532da5c525686d96d4c2e74cdd345badf8dfef9f6b39dd5f5e8"
 dependencies = [
  "bytes",
  "fnv",
@@ -1834,9 +1827,9 @@ dependencies = [
 
 [[package]]
 name = "hashbrown"
-version = "0.14.3"
+version = "0.14.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "290f1a1d9242c78d09ce40a5e87e7554ee637af1351968159f4952f028f75604"
+checksum = "e5274423e17b7c9fc20b6e7e208532f9b19825d82dfd615708b70edd83df41f1"
 dependencies = [
  "ahash",
  "allocator-api2",
@@ -1857,11 +1850,23 @@ version = "0.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "95505c38b4572b2d910cecb0281560f54b440a19336cbbcb27bf6ce6adc6f5a8"
 
+[[package]]
+name = "heck"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2304e00983f87ffb38b55b444b5e3b60a884b5d30c0fca7d82fe33449bbe55ea"
+
 [[package]]
 name = "hermit-abi"
-version = "0.3.3"
+version = "0.3.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d231dfb89cfffdbc30e7fc41579ed6066ad03abda9e567ccafae602b97ec5024"
+
+[[package]]
+name = "hermit-abi"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d77f7ec81a6d05a3abb01ab6eb7590f6083d08449fe5a1c8b1e620283546ccb7"
+checksum = "fbf6a919d6cf397374f7dfeeea91d974c7c0a7221d0d0f4f20d859d329e53fcc"
 
 [[package]]
 name = "hex"
@@ -1877,9 +1882,9 @@ checksum = "b07f60793ff0a4d9cef0f18e63b5357e06209987153a64648c972c1e5aff336f"
 
 [[package]]
 name = "hickory-proto"
-version = "0.24.0"
+version = "0.24.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "091a6fbccf4860009355e3efc52ff4acf37a63489aad7435372d44ceeb6fbbcf"
+checksum = "07698b8420e2f0d6447a436ba999ec85d8fbf2a398bbd737b82cac4a2e96e512"
 dependencies = [
  "async-trait",
  "cfg-if",
@@ -1892,7 +1897,7 @@ dependencies = [
  "ipnet",
  "once_cell",
  "rand",
- "socket2 0.5.5",
+ "socket2",
  "thiserror",
  "tinyvec",
  "tokio",
@@ -1902,9 +1907,9 @@ dependencies = [
 
 [[package]]
 name = "hickory-resolver"
-version = "0.24.0"
+version = "0.24.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "35b8f021164e6a984c9030023544c57789c51760065cd510572fedcfb04164e8"
+checksum = "28757f23aa75c98f254cf0405e6d8c25b831b32921b050a66692427679b1f243"
 dependencies = [
  "cfg-if",
  "futures-util",
@@ -1941,11 +1946,11 @@ dependencies = [
 
 [[package]]
 name = "home"
-version = "0.5.5"
+version = "0.5.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5444c27eef6923071f7ebcc33e3444508466a76f7a2b93da00ed6e19f30c1ddb"
+checksum = "e3d1354bf6b7235cb4a0576c2619fd4ed18183f689b12b006a0ee7329eeff9a5"
 dependencies = [
- "windows-sys 0.48.0",
+ "windows-sys 0.52.0",
 ]
 
 [[package]]
@@ -1961,9 +1966,9 @@ dependencies = [
 
 [[package]]
 name = "http"
-version = "0.2.11"
+version = "0.2.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8947b1a6fad4393052c7ba1f4cd97bed3e953a95c79c92ad9b051a04611d9fbb"
+checksum = "601cbb57e577e2f5ef5be8e7b83f0f63994f25aa94d673e54a92d5c516d101f1"
 dependencies = [
  "bytes",
  "fnv",
@@ -1983,9 +1988,9 @@ dependencies = [
 
 [[package]]
 name = "httparse"
-version = "1.8.0"
+version = "1.9.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d897f394bad6a705d5f4104762e116a75639e470d80901eed05a860a95cb1904"
+checksum = "0fcc0b4a115bf80b728eb8ea024ad5bd707b615bfed49e0665b6e0f86fd082d9"
 
 [[package]]
 name = "httpdate"
@@ -1995,9 +2000,9 @@ checksum = "df3b46402a9d5adb4c86a0cf463f42e19994e3ee891101b1841f30a545cb49a9"
 
 [[package]]
 name = "hyper"
-version = "0.14.27"
+version = "0.14.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ffb1cfd654a8219eaef89881fdb3bb3b1cdc5fa75ded05d6933b2b382e395468"
+checksum = "a152ddd61dfaec7273fe8419ab357f33aee0d914c5f4efbf0d96fa749eea5ec9"
 dependencies = [
  "bytes",
  "futures-channel",
@@ -2010,7 +2015,7 @@ dependencies = [
  "httpdate",
  "itoa",
  "pin-project-lite",
- "socket2 0.4.10",
+ "socket2",
  "tokio",
  "tower-service",
  "tracing",
@@ -2026,7 +2031,7 @@ dependencies = [
  "futures-util",
  "http",
  "hyper",
- "rustls",
+ "rustls 0.21.12",
  "tokio",
  "tokio-rustls",
 ]
@@ -2082,9 +2087,9 @@ dependencies = [
 
 [[package]]
 name = "igd-next"
-version = "0.14.2"
+version = "0.14.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "57e065e90a518ab5fedf79aa1e4b784e10f8e484a834f6bda85c42633a2cb7af"
+checksum = "064d90fec10d541084e7b39ead8875a5a80d9114a2b18791565253bae25f49e4"
 dependencies = [
  "async-trait",
  "attohttpc",
@@ -2145,9 +2150,9 @@ checksum = "ce23b50ad8242c51a442f3ff322d56b02f08852c77e4c0b4d3fd684abc89c683"
 
 [[package]]
 name = "indexmap"
-version = "2.1.0"
+version = "2.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d530e1a18b1cb4c484e6e34556a0d948706958449fca0cab753d649f2bce3d1f"
+checksum = "de3fc2e30ba82dd1b3911c8de1ffc143c74a914a14e99514d7637e3099df5ea0"
 dependencies = [
  "equivalent",
  "hashbrown",
@@ -2164,9 +2169,9 @@ dependencies = [
 
 [[package]]
 name = "instant"
-version = "0.1.12"
+version = "0.1.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7a5bbe824c507c5da5956355e86a746d82e0e1464f65d862cc5e71da70e94b2c"
+checksum = "e0242819d153cba4b4b05a5a8f2a7e9bbf97b6055b2a002b395c96b5ff3c0222"
 dependencies = [
  "cfg-if",
 ]
@@ -2177,7 +2182,7 @@ version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b58db92f96b720de98181bbbe63c831e87005ab460c1bf306eb2622b4707997f"
 dependencies = [
- "socket2 0.5.5",
+ "socket2",
  "widestring",
  "windows-sys 0.48.0",
  "winreg",
@@ -2190,24 +2195,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8f518f335dce6725a761382244631d86cf0ccb2863413590b31338feb467f9c3"
 
 [[package]]
-name = "is-terminal"
-version = "0.4.9"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cb0889898416213fab133e1d33a0e5858a48177452750691bde3666d0fdbaf8b"
-dependencies = [
- "hermit-abi",
- "rustix",
- "windows-sys 0.48.0",
-]
-
-[[package]]
-name = "itertools"
-version = "0.10.5"
+name = "is_terminal_polyfill"
+version = "1.70.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b0fd2260e829bddf4cb6ea802289de2f86d6a7a690192fbe91b3f46e0f2c8473"
-dependencies = [
- "either",
-]
+checksum = "7943c866cc5cd64cbc25b2e01621d07fa8eb2a1a23160ee81ce38704e97b8ecf"
 
 [[package]]
 name = "itertools"
@@ -2220,24 +2211,24 @@ dependencies = [
 
 [[package]]
 name = "itoa"
-version = "1.0.10"
+version = "1.0.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b1a46d1a171d865aa5f83f92695765caa047a9b4cbae2cbf37dbd613a793fd4c"
+checksum = "49f1f14873335454500d59611f1cf4a4b0f786f9ac11f4312a78e4cf2566695b"
 
 [[package]]
 name = "jobserver"
-version = "0.1.27"
+version = "0.1.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8c37f63953c4c63420ed5fd3d6d398c719489b9f872b9fa683262f8edd363c7d"
+checksum = "48d1dbcbbeb6a7fec7e059840aa538bd62aaccf972c7346c4d9d2059312853d0"
 dependencies = [
  "libc",
 ]
 
 [[package]]
 name = "js-sys"
-version = "0.3.66"
+version = "0.3.69"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cee9c64da59eae3b50095c18d3e74f8b73c0b86d2792824ff01bbce68ba229ca"
+checksum = "29c15563dc2726973df627357ce0c9ddddbea194836909d655df6a75d2cf296d"
 dependencies = [
  "wasm-bindgen",
 ]
@@ -2248,7 +2239,7 @@ version = "8.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6971da4d9c3aa03c3d8f3ff0f4155b534aad021292003895a469716b2a230378"
 dependencies = [
- "base64 0.21.5",
+ "base64 0.21.7",
  "pem 1.1.1",
  "ring 0.16.20",
  "serde",
@@ -2258,9 +2249,9 @@ dependencies = [
 
 [[package]]
 name = "k256"
-version = "0.13.2"
+version = "0.13.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3f01b677d82ef7a676aa37e099defd83a28e15687112cafdd112d60236b6115b"
+checksum = "956ff9b67e26e1a6a866cb758f12c6f8746208489e3e4a4b5580802f2f0a587b"
 dependencies = [
  "cfg-if",
  "ecdsa",
@@ -2272,52 +2263,54 @@ dependencies = [
 
 [[package]]
 name = "keccak"
-version = "0.1.4"
+version = "0.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8f6d5ed8676d904364de097082f4e7d240b571b67989ced0240f08b7f966f940"
+checksum = "ecc2af9a1119c51f12a14607e783cb977bde58bc069ff0c3da1095e635d70654"
 dependencies = [
  "cpufeatures",
 ]
 
 [[package]]
 name = "lalrpop"
-version = "0.20.0"
+version = "0.20.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "da4081d44f4611b66c6dd725e6de3169f9f63905421e8626fcb86b6a898998b8"
+checksum = "55cb077ad656299f160924eb2912aa147d7339ea7d69e1b5517326fdcec3c1ca"
 dependencies = [
  "ascii-canvas",
  "bit-set",
- "diff",
  "ena",
- "is-terminal",
- "itertools 0.10.5",
+ "itertools",
  "lalrpop-util",
  "petgraph",
  "regex",
- "regex-syntax 0.7.5",
+ "regex-syntax 0.8.4",
  "string_cache",
  "term",
  "tiny-keccak",
  "unicode-xid",
+ "walkdir",
 ]
 
 [[package]]
 name = "lalrpop-util"
-version = "0.20.0"
+version = "0.20.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3f35c735096c0293d313e8f2a641627472b83d01b937177fe76e5e2708d31e0d"
+checksum = "507460a910eb7b32ee961886ff48539633b788a36b65692b95f225b844c82553"
+dependencies = [
+ "regex-automata 0.4.7",
+]
 
 [[package]]
 name = "lazy_static"
-version = "1.4.0"
+version = "1.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
+checksum = "bbd2bcb4c963f2ddae06a2efc7e9f3591312473c50c6685e1f298068316e66fe"
 
 [[package]]
 name = "libc"
-version = "0.2.151"
+version = "0.2.155"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "302d7ab3130588088d277783b1e2d2e10c9e9e4a16dd9050e6ec93fb3e7048f4"
+checksum = "97b3888a4aecf77e811145cadf6eef5901f4782c53886191b2f693f24761847c"
 
 [[package]]
 name = "libm"
@@ -2386,15 +2379,14 @@ dependencies = [
 
 [[package]]
 name = "libp2p-core"
-version = "0.41.2"
+version = "0.41.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8130a8269e65a2554d55131c770bdf4bcd94d2b8d4efb24ca23699be65066c05"
+checksum = "a5a8920cbd8540059a01950c1e5c96ea8d89eb50c51cd366fc18bdf540a6e48f"
 dependencies = [
  "either",
  "fnv",
  "futures",
  "futures-timer",
- "instant",
  "libp2p-identity",
  "multiaddr",
  "multihash",
@@ -2411,6 +2403,7 @@ dependencies = [
  "tracing",
  "unsigned-varint 0.8.0",
  "void",
+ "web-time",
 ]
 
 [[package]]
@@ -2436,7 +2429,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d665144a616dadebdc5fff186b1233488cdcd8bfb1223218ff084b6d052c94f7"
 dependencies = [
  "asynchronous-codec",
- "base64 0.21.5",
+ "base64 0.21.7",
  "byteorder",
  "bytes",
  "either",
@@ -2463,9 +2456,9 @@ dependencies = [
 
 [[package]]
 name = "libp2p-identify"
-version = "0.44.1"
+version = "0.44.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "20499a945d2f0221fdc6269b3848892c0f370d2ee3e19c7f65a29d8f860f6126"
+checksum = "b5d635ebea5ca0c3c3e77d414ae9b67eccf2a822be06091b9c1a0d13029a1e2f"
 dependencies = [
  "asynchronous-codec",
  "either",
@@ -2486,9 +2479,9 @@ dependencies = [
 
 [[package]]
 name = "libp2p-identity"
-version = "0.2.8"
+version = "0.2.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "999ec70441b2fb35355076726a6bc466c932e9bdc66f6a11c6c0aa17c7ab9be0"
+checksum = "55cca1eb2bc1fd29f099f3daaab7effd01e1a54b7c577d0ed082521034d912e8"
 dependencies = [
  "bs58",
  "ed25519-dalek",
@@ -2548,7 +2541,7 @@ dependencies = [
  "libp2p-swarm",
  "rand",
  "smallvec",
- "socket2 0.5.5",
+ "socket2",
  "tokio",
  "tracing",
  "void",
@@ -2600,9 +2593,9 @@ dependencies = [
 
 [[package]]
 name = "libp2p-quic"
-version = "0.10.2"
+version = "0.10.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a0375cdfee57b47b313ef1f0fdb625b78aed770d33a40cf1c294a371ff5e6666"
+checksum = "c67296ad4e092e23f92aea3d2bdb6f24eab79c0929ed816dfb460ea2f4567d2b"
 dependencies = [
  "bytes",
  "futures",
@@ -2614,9 +2607,9 @@ dependencies = [
  "parking_lot",
  "quinn",
  "rand",
- "ring 0.16.20",
- "rustls",
- "socket2 0.5.5",
+ "ring 0.17.8",
+ "rustls 0.23.12",
+ "socket2",
  "thiserror",
  "tokio",
  "tracing",
@@ -2624,9 +2617,9 @@ dependencies = [
 
 [[package]]
 name = "libp2p-request-response"
-version = "0.26.1"
+version = "0.26.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e12823250fe0c45bdddea6eefa2be9a609aff1283ff4e1d8a294fdbb89572f6f"
+checksum = "c314fe28368da5e3a262553fb0ad575c1c8934c461e10de10265551478163836"
 dependencies = [
  "async-trait",
  "futures",
@@ -2646,9 +2639,9 @@ dependencies = [
 
 [[package]]
 name = "libp2p-swarm"
-version = "0.44.1"
+version = "0.44.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e92532fc3c4fb292ae30c371815c9b10103718777726ea5497abc268a4761866"
+checksum = "80cae6cb75f89dbca53862f9ebe0b9f463aa7b302762fcfaafb9e51dcc9b0f7e"
 dependencies = [
  "either",
  "fnv",
@@ -2658,6 +2651,7 @@ dependencies = [
  "libp2p-core",
  "libp2p-identity",
  "libp2p-swarm-derive",
+ "lru",
  "multistream-select",
  "once_cell",
  "rand",
@@ -2669,14 +2663,14 @@ dependencies = [
 
 [[package]]
 name = "libp2p-swarm-derive"
-version = "0.34.1"
+version = "0.34.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b644268b4acfdaa6a6100b31226ee7a36d96ab4c43287d113bfd2308607d8b6f"
+checksum = "5daceb9dd908417b6dfcfe8e94098bc4aac54500c282e78120b885dadc09b999"
 dependencies = [
- "heck",
+ "heck 0.5.0",
  "proc-macro2",
  "quote",
- "syn 2.0.48",
+ "syn 2.0.72",
 ]
 
 [[package]]
@@ -2691,25 +2685,25 @@ dependencies = [
  "libc",
  "libp2p-core",
  "libp2p-identity",
- "socket2 0.5.5",
+ "socket2",
  "tokio",
  "tracing",
 ]
 
 [[package]]
 name = "libp2p-tls"
-version = "0.3.0"
+version = "0.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "93ce7e3c2e7569d685d08ec795157981722ff96e9e9f9eae75df3c29d02b07a5"
+checksum = "72b7b831e55ce2aa6c354e6861a85fdd4dd0a2b97d5e276fabac0e4810a71776"
 dependencies = [
  "futures",
  "futures-rustls",
  "libp2p-core",
  "libp2p-identity",
  "rcgen",
- "ring 0.16.20",
- "rustls",
- "rustls-webpki",
+ "ring 0.17.8",
+ "rustls 0.23.12",
+ "rustls-webpki 0.101.7",
  "thiserror",
  "x509-parser",
  "yasna",
@@ -2717,9 +2711,9 @@ dependencies = [
 
 [[package]]
 name = "libp2p-upnp"
-version = "0.2.0"
+version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "963eb8a174f828f6a51927999a9ab5e45dfa9aa2aa5fed99aa65f79de6229464"
+checksum = "cccf04b0e3ff3de52d07d5fd6c3b061d0e7f908ffc683c32d9638caedce86fc8"
 dependencies = [
  "futures",
  "futures-timer",
@@ -2743,18 +2737,17 @@ dependencies = [
  "thiserror",
  "tracing",
  "yamux 0.12.1",
- "yamux 0.13.1",
+ "yamux 0.13.3",
 ]
 
 [[package]]
 name = "libredox"
-version = "0.0.1"
+version = "0.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "85c833ca1e66078851dba29046874e38f08b2c883700aa29a03ddd3b23814ee8"
+checksum = "c0ff37bd590ca25063e35af745c343cb7a0271906fb7b37e4813e8f79f00268d"
 dependencies = [
- "bitflags 2.4.1",
+ "bitflags 2.6.0",
  "libc",
- "redox_syscall",
 ]
 
 [[package]]
@@ -2765,15 +2758,15 @@ checksum = "0717cef1bc8b636c6e1c1bbdefc09e6322da8a9321966e8928ef80d20f7f770f"
 
 [[package]]
 name = "linux-raw-sys"
-version = "0.4.12"
+version = "0.4.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c4cd1a83af159aa67994778be9070f0ae1bd732942279cabb14f86f986a21456"
+checksum = "78b3ae25bc7c8c38cec158d1f2757ee79e9b3740fbc7ccf0e59e4b08d793fa89"
 
 [[package]]
 name = "lock_api"
-version = "0.4.11"
+version = "0.4.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3c168f8615b12bc01f9c17e2eb0cc07dcae1940121185446edc3744920e8ef45"
+checksum = "07af8b9cdd281b7915f413fa73f29ebd5d55d0d3f0155584dade1ff18cea1b17"
 dependencies = [
  "autocfg",
  "scopeguard",
@@ -2781,15 +2774,15 @@ dependencies = [
 
 [[package]]
 name = "log"
-version = "0.4.20"
+version = "0.4.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b5e6163cb8c49088c2c36f57875e58ccd8c87c7427f7fbd50ea6710b2f3f2e8f"
+checksum = "a7a70ba024b9dc04c27ea2f0c0548feb474ec5c54bba33a7f72f873a39d07b24"
 
 [[package]]
 name = "lru"
-version = "0.12.1"
+version = "0.12.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2994eeba8ed550fd9b47a0b38f0242bc3344e496483c6180b69139cc2fa5d1d7"
+checksum = "37ee39891760e7d94734f6f63fedc29a2e4a152f836120753a72503f09fcf904"
 dependencies = [
  "hashbrown",
 ]
@@ -2830,18 +2823,9 @@ dependencies = [
 
 [[package]]
 name = "memchr"
-version = "2.6.4"
+version = "2.7.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f665ee40bc4a3c5590afb1e9677db74a508659dfd71e126420da8274909a0167"
-
-[[package]]
-name = "memoffset"
-version = "0.9.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5a634b1c61a95585bd15607c6ab0c4e5b226e695ff2800ba0cdccddf208c406c"
-dependencies = [
- "autocfg",
-]
+checksum = "78ca9ab1a0babb1e7d5695e3530886289c18cf2f87ec19a575a0abdce112e3a3"
 
 [[package]]
 name = "mime"
@@ -2857,22 +2841,23 @@ checksum = "68354c5c6bd36d73ff3feceb05efa59b6acb7626617f4962be322a825e61f79a"
 
 [[package]]
 name = "miniz_oxide"
-version = "0.7.1"
+version = "0.7.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e7810e0be55b428ada41041c41f32c9f1a42817901b4ccf45fa3d4b6561e74c7"
+checksum = "b8a240ddb74feaf34a79a7add65a741f3167852fba007066dcac1ca548d89c08"
 dependencies = [
  "adler",
 ]
 
 [[package]]
 name = "mio"
-version = "0.8.11"
+version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a4a650543ca06a924e8b371db273b2756685faae30f8487da1b56505a8f78b0c"
+checksum = "4569e456d394deccd22ce1c1913e6ea0e54519f577285001215d33557431afe4"
 dependencies = [
+ "hermit-abi 0.3.9",
  "libc",
  "wasi",
- "windows-sys 0.48.0",
+ "windows-sys 0.52.0",
 ]
 
 [[package]]
@@ -2985,9 +2970,9 @@ dependencies = [
 
 [[package]]
 name = "netlink-sys"
-version = "0.8.5"
+version = "0.8.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6471bf08e7ac0135876a9581bf3217ef0333c191c128d34878079f42ee150411"
+checksum = "416060d346fbaf1f23f9512963e3e878f1a78e707cb699ba9215761754244307"
 dependencies = [
  "bytes",
  "futures",
@@ -2998,9 +2983,9 @@ dependencies = [
 
 [[package]]
 name = "new_debug_unreachable"
-version = "1.0.4"
+version = "1.0.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e4a24736216ec316047a1fc4252e27dabb04218aa4a3f37c6e7ddbf1f9782b54"
+checksum = "650eef8c711430f1a879fdd01d4745a7deea475becfb90269c06775983bbf086"
 
 [[package]]
 name = "nix"
@@ -3041,30 +3026,34 @@ dependencies = [
 
 [[package]]
 name = "num-bigint"
-version = "0.4.4"
+version = "0.4.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "608e7659b5c3d7cba262d894801b9ec9d00de989e8a82bd4bef91d08da45cdc0"
+checksum = "a5e44f723f1133c9deac646763579fdb3ac745e418f2a7af9cd0c431da1f20b9"
 dependencies = [
- "autocfg",
  "num-integer",
  "num-traits",
 ]
 
+[[package]]
+name = "num-conv"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "51d515d32fb182ee37cda2ccdcb92950d6a3c2893aa280e540671c2cd0f3b1d9"
+
 [[package]]
 name = "num-integer"
-version = "0.1.45"
+version = "0.1.46"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "225d3389fb3509a24c93f5c29eb6bde2586b98d9f016636dff58d7c6f7569cd9"
+checksum = "7969661fd2958a5cb096e56c8e1ad0444ac2bbcd0061bd28660485a44879858f"
 dependencies = [
- "autocfg",
  "num-traits",
 ]
 
 [[package]]
 name = "num-traits"
-version = "0.2.17"
+version = "0.2.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "39e3200413f237f41ab11ad6d161bc7239c84dcb631773ccd7de3dfe4b5c267c"
+checksum = "071dfc062690e90b734c0b2273ce72ad0ffa95f0c74596bc250dcfd960262841"
 dependencies = [
  "autocfg",
  "libm",
@@ -3076,45 +3065,45 @@ version = "1.16.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4161fcb6d602d4d2081af7c3a45852d875a03dd337a6bfdd6e06407b61342a43"
 dependencies = [
- "hermit-abi",
+ "hermit-abi 0.3.9",
  "libc",
 ]
 
 [[package]]
 name = "num_enum"
-version = "0.7.1"
+version = "0.7.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "683751d591e6d81200c39fb0d1032608b77724f34114db54f571ff1317b337c0"
+checksum = "4e613fc340b2220f734a8595782c551f1250e969d87d3be1ae0579e8d4065179"
 dependencies = [
  "num_enum_derive",
 ]
 
 [[package]]
 name = "num_enum_derive"
-version = "0.7.1"
+version = "0.7.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6c11e44798ad209ccdd91fc192f0526a369a01234f7373e1b141c96d7cee4f0e"
+checksum = "af1844ef2428cc3e1cb900be36181049ef3d3193c63e43026cfe202983b27a56"
 dependencies = [
- "proc-macro-crate 2.0.0",
+ "proc-macro-crate",
  "proc-macro2",
  "quote",
- "syn 2.0.48",
+ "syn 2.0.72",
 ]
 
 [[package]]
 name = "object"
-version = "0.32.1"
+version = "0.36.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9cf5f9dd3933bd50a9e1f149ec995f39ae2c496d31fd772c1fd45ebc27e902b0"
+checksum = "3f203fa8daa7bb185f760ae12bd8e097f63d17041dcdcaf675ac54cdf863170e"
 dependencies = [
  "memchr",
 ]
 
 [[package]]
 name = "oid-registry"
-version = "0.6.1"
+version = "0.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9bedf36ffb6ba96c2eb7144ef6270557b52e54b20c0a8e1eb2ff99a6c6959bff"
+checksum = "1c958dd45046245b9c3c2547369bb634eb461670b2e7e0de552905801a648d1d"
 dependencies = [
  "asn1-rs",
 ]
@@ -3127,9 +3116,9 @@ checksum = "3fdb12b2476b595f9358c5161aa467c2438859caa136dec86c26fdd2efe17b92"
 
 [[package]]
 name = "opaque-debug"
-version = "0.3.0"
+version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "624a8340c38c1b80fd549087862da4ba43e08858af025b236e509b6649fc13d5"
+checksum = "c08d65885ee38876c4f86fa503fb49d7b507c2b62552df7c70b2fce627e06381"
 
 [[package]]
 name = "open-fastrlp"
@@ -3170,9 +3159,9 @@ checksum = "b15813163c1d831bf4a13c3610c05c0d03b39feb07f7e09fa234dac9b15aaf39"
 
 [[package]]
 name = "parity-scale-codec"
-version = "3.6.9"
+version = "3.6.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "881331e34fa842a2fb61cc2db9643a8fedc615e47cfcc52597d1af0db9a7e8fe"
+checksum = "306800abfa29c7f16596b5970a588435e3d5b3149683d00c12b699cc19f895ee"
 dependencies = [
  "arrayvec",
  "bitvec",
@@ -3184,11 +3173,11 @@ dependencies = [
 
 [[package]]
 name = "parity-scale-codec-derive"
-version = "3.6.9"
+version = "3.6.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "be30eaf4b0a9fba5336683b38de57bb86d179a35862ba6bfcf57625d006bde5b"
+checksum = "d830939c76d294956402033aee57a6da7b438f2294eb94864c37b0569053a42c"
 dependencies = [
- "proc-macro-crate 2.0.0",
+ "proc-macro-crate",
  "proc-macro2",
  "quote",
  "syn 1.0.109",
@@ -3202,9 +3191,9 @@ checksum = "bb813b8af86854136c6922af0598d719255ecb2179515e6e7730d468f05c9cae"
 
 [[package]]
 name = "parking_lot"
-version = "0.12.1"
+version = "0.12.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3742b2c103b9f06bc9fff0a37ff4912935851bee6d36f3c02bcc755bcfec228f"
+checksum = "f1bf18183cf54e8d6059647fc3063646a1801cf30896933ec2311622cc4b9a27"
 dependencies = [
  "lock_api",
  "parking_lot_core",
@@ -3212,15 +3201,15 @@ dependencies = [
 
 [[package]]
 name = "parking_lot_core"
-version = "0.9.9"
+version = "0.9.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4c42a9226546d68acdd9c0a280d17ce19bfe27a46bf68784e4066115788d008e"
+checksum = "1e401f977ab385c9e4e3ab30627d6f26d00e2c73eef317493c4ec6d468726cf8"
 dependencies = [
  "cfg-if",
  "libc",
  "redox_syscall",
  "smallvec",
- "windows-targets 0.48.5",
+ "windows-targets 0.52.6",
 ]
 
 [[package]]
@@ -3236,9 +3225,9 @@ dependencies = [
 
 [[package]]
 name = "paste"
-version = "1.0.14"
+version = "1.0.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "de3145af08024dea9fa9914f381a17b8fc6034dfb00f3a84013f7ff43f29ed4c"
+checksum = "57c0d7b74b563b49d38dae00a0c37d4d6de9b432382b2892f0574ddcae73fd0a"
 
 [[package]]
 name = "path-slash"
@@ -3279,11 +3268,11 @@ dependencies = [
 
 [[package]]
 name = "pem"
-version = "3.0.3"
+version = "3.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1b8fcc794035347fb64beda2d3b462595dd2753e3f268d89c5aae77e8cf2c310"
+checksum = "8e459365e590736a54c3fa561947c84837534b8e9af6fc5bf781307e82658fae"
 dependencies = [
- "base64 0.21.5",
+ "base64 0.22.1",
  "serde",
 ]
 
@@ -3295,9 +3284,9 @@ checksum = "e3148f5046208a5d56bcfc03053e3ca6334e51da8dfb19b6cdc8b306fae3283e"
 
 [[package]]
 name = "petgraph"
-version = "0.6.4"
+version = "0.6.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e1d3afd2628e69da2be385eb6f2fd57c8ac7977ceeff6dc166ff1657b0e386a9"
+checksum = "b4c5cc86750666a3ed20bdaf5ca2a0344f9c67674cae0515bec2da16fbaa47db"
 dependencies = [
  "fixedbitset",
  "indexmap",
@@ -3343,7 +3332,7 @@ dependencies = [
  "phf_shared 0.11.2",
  "proc-macro2",
  "quote",
- "syn 2.0.48",
+ "syn 2.0.72",
 ]
 
 [[package]]
@@ -3366,29 +3355,29 @@ dependencies = [
 
 [[package]]
 name = "pin-project"
-version = "1.1.3"
+version = "1.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fda4ed1c6c173e3fc7a83629421152e01d7b1f9b7f65fb301e490e8cfc656422"
+checksum = "b6bf43b791c5b9e34c3d182969b4abb522f9343702850a2e57f460d00d09b4b3"
 dependencies = [
  "pin-project-internal",
 ]
 
 [[package]]
 name = "pin-project-internal"
-version = "1.1.3"
+version = "1.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4359fd9c9171ec6e8c62926d6faaf553a8dc3f64e1507e76da7911b4f6a04405"
+checksum = "2f38a4412a78282e09a2cf38d195ea5420d15ba0602cb375210efbc877243965"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.48",
+ "syn 2.0.72",
 ]
 
 [[package]]
 name = "pin-project-lite"
-version = "0.2.13"
+version = "0.2.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8afb450f006bf6385ca15ef45d71d2288452bc3683ce2e2cacc0d18e4be60b58"
+checksum = "bda66fc9667c18cb2758a2ac84d1167245054bcf85d5d1aaa6923f45801bdd02"
 
 [[package]]
 name = "pin-utils"
@@ -3408,24 +3397,19 @@ dependencies = [
 
 [[package]]
 name = "pkg-config"
-version = "0.3.27"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "26072860ba924cbfa98ea39c8c19b4dd6a4a25423dbdf219c1eca91aa0cf6964"
-
-[[package]]
-name = "platforms"
-version = "3.2.0"
+version = "0.3.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "14e6ab3f592e6fb464fc9712d8d6e6912de6473954635fd76a589d832cffcbb0"
+checksum = "d231b230927b5e4ad203db57bbcbee2802f6bce620b1e4a9024a07d94e2907ec"
 
 [[package]]
 name = "polling"
-version = "3.3.1"
+version = "3.7.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cf63fa624ab313c11656b4cda960bfc46c410187ad493c41f6ba2d8c1e991c9e"
+checksum = "a3ed00ed3fbf728b5816498ecd316d1716eecaced9c0c8d2c5a6740ca214985b"
 dependencies = [
  "cfg-if",
  "concurrent-queue",
+ "hermit-abi 0.4.0",
  "pin-project-lite",
  "rustix",
  "tracing",
@@ -3445,9 +3429,9 @@ dependencies = [
 
 [[package]]
 name = "polyval"
-version = "0.6.1"
+version = "0.6.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d52cff9d1d4dee5fe6d03729099f4a310a41179e0a10dbf542039873f2e826fb"
+checksum = "9d1fe60d06143b2430aa532c94cfe9e29783047f06c0d7fd359a9a51b729fa25"
 dependencies = [
  "cfg-if",
  "cpufeatures",
@@ -3463,9 +3447,12 @@ checksum = "439ee305def115ba05938db6eb1644ff94165c5ab5e9420d1c1bcedbba909391"
 
 [[package]]
 name = "ppv-lite86"
-version = "0.2.17"
+version = "0.2.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5b40af805b3121feab8a3c29f04d8ad262fa8e0561883e7653e024ae4479e6de"
+checksum = "dee4364d9f3b902ef14fab8a1ddffb783a1cb6b4bba3bfc1fa3922732c7de97f"
+dependencies = [
+ "zerocopy 0.6.6",
+]
 
 [[package]]
 name = "precomputed-hash"
@@ -3475,12 +3462,12 @@ checksum = "925383efa346730478fb4838dbe9137d2a47675ad789c546d150a6e1dd4ab31c"
 
 [[package]]
 name = "prettyplease"
-version = "0.2.15"
+version = "0.2.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ae005bd773ab59b4725093fd7df83fd7892f7d8eafb48dbd7de6e024e4215f9d"
+checksum = "5f12335488a2f3b0a83b14edad48dca9879ce89b2edd10e80237e4e852dd645e"
 dependencies = [
  "proc-macro2",
- "syn 2.0.48",
+ "syn 2.0.72",
 ]
 
 [[package]]
@@ -3499,61 +3486,27 @@ dependencies = [
 
 [[package]]
 name = "proc-macro-crate"
-version = "1.3.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7f4c021e1093a56626774e81216a4ce732a735e5bad4868a03f3ed65ca0c3919"
-dependencies = [
- "once_cell",
- "toml_edit 0.19.15",
-]
-
-[[package]]
-name = "proc-macro-crate"
-version = "2.0.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7e8366a6159044a37876a2b9817124296703c586a5c92e2c53751fa06d8d43e8"
-dependencies = [
- "toml_edit 0.20.2",
-]
-
-[[package]]
-name = "proc-macro-error"
-version = "1.0.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "da25490ff9892aab3fcf7c36f08cfb902dd3e71ca0f9f9517bea02a73a5ce38c"
-dependencies = [
- "proc-macro-error-attr",
- "proc-macro2",
- "quote",
- "syn 1.0.109",
- "version_check",
-]
-
-[[package]]
-name = "proc-macro-error-attr"
-version = "1.0.4"
+version = "3.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a1be40180e52ecc98ad80b184934baf3d0d29f979574e439af5a55274b35f869"
+checksum = "6d37c51ca738a55da99dc0c4a34860fd675453b8b36209178c2249bb13651284"
 dependencies = [
- "proc-macro2",
- "quote",
- "version_check",
+ "toml_edit 0.21.1",
 ]
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.78"
+version = "1.0.86"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e2422ad645d89c99f8f3e6b88a9fdeca7fabeac836b1002371c4367c8f984aae"
+checksum = "5e719e8df665df0d1c8fbfd238015744736151d4445ec0836b8e628aae103b77"
 dependencies = [
  "unicode-ident",
 ]
 
 [[package]]
 name = "prometheus-client"
-version = "0.22.0"
+version = "0.22.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "510c4f1c9d81d556458f94c98f857748130ea9737bbd6053da497503b26ea63c"
+checksum = "504ee9ff529add891127c4827eb481bd69dc0ebc72e9a682e187db4caa60c3ca"
 dependencies = [
  "dtoa",
  "itoa",
@@ -3569,22 +3522,22 @@ checksum = "440f724eba9f6996b75d63681b0a92b06947f1457076d503a4d2e2c8f56442b8"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.48",
+ "syn 2.0.72",
 ]
 
 [[package]]
 name = "proptest"
-version = "1.4.0"
+version = "1.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "31b476131c3c86cb68032fdc5cb6d5a1045e3e42d96b69fa599fd77701e1f5bf"
+checksum = "b4c2511913b88df1637da85cc8d96ec8e43a3f8bb8ccb71ee1ac240d6f3df58d"
 dependencies = [
- "bitflags 2.4.1",
+ "bitflags 2.6.0",
  "lazy_static",
  "num-traits",
  "rand",
  "rand_chacha",
  "rand_xorshift",
- "regex-syntax 0.8.2",
+ "regex-syntax 0.8.4",
  "unarray",
 ]
 
@@ -3618,9 +3571,9 @@ dependencies = [
 
 [[package]]
 name = "quinn"
-version = "0.10.2"
+version = "0.11.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8cc2c5017e4b43d5995dcea317bc46c1e09404c0a9664d2908f7f02dfe943d75"
+checksum = "e4ceeeeabace7857413798eb1ffa1e9c905a9946a57d81fb69b4b71c4d8eb3ad"
 dependencies = [
  "bytes",
  "futures-io",
@@ -3628,7 +3581,7 @@ dependencies = [
  "quinn-proto",
  "quinn-udp",
  "rustc-hash",
- "rustls",
+ "rustls 0.23.12",
  "thiserror",
  "tokio",
  "tracing",
@@ -3636,15 +3589,15 @@ dependencies = [
 
 [[package]]
 name = "quinn-proto"
-version = "0.10.6"
+version = "0.11.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "141bf7dfde2fbc246bfd3fe12f2455aa24b0fbd9af535d8c86c7bd1381ff2b1a"
+checksum = "ddf517c03a109db8100448a4be38d498df8a210a99fe0e1b9eaf39e78c640efe"
 dependencies = [
  "bytes",
  "rand",
- "ring 0.16.20",
+ "ring 0.17.8",
  "rustc-hash",
- "rustls",
+ "rustls 0.23.12",
  "slab",
  "thiserror",
  "tinyvec",
@@ -3653,22 +3606,21 @@ dependencies = [
 
 [[package]]
 name = "quinn-udp"
-version = "0.4.1"
+version = "0.5.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "055b4e778e8feb9f93c4e439f71dc2156ef13360b432b799e179a8c4cdf0b1d7"
+checksum = "8bffec3605b73c6f1754535084a85229fa8a30f86014e6c81aeec4abb68b0285"
 dependencies = [
- "bytes",
  "libc",
- "socket2 0.5.5",
- "tracing",
- "windows-sys 0.48.0",
+ "once_cell",
+ "socket2",
+ "windows-sys 0.52.0",
 ]
 
 [[package]]
 name = "quote"
-version = "1.0.35"
+version = "1.0.36"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "291ec9ab5efd934aaf503a6466c5d5251535d108ee747472c3977cc5acc868ef"
+checksum = "0fa76aaf39101c457836aec0ce2316dbdc3ab723cdda1c6bd4e6ad4208acaca7"
 dependencies = [
  "proc-macro2",
 ]
@@ -3720,9 +3672,9 @@ dependencies = [
 
 [[package]]
 name = "rayon"
-version = "1.8.0"
+version = "1.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9c27db03db7734835b3f53954b534c91069375ce6ccaa2e065441e07d9b6cdb1"
+checksum = "b418a60154510ca1a002a752ca9714984e21e4241e804d32555251faf8b78ffa"
 dependencies = [
  "either",
  "rayon-core",
@@ -3730,9 +3682,9 @@ dependencies = [
 
 [[package]]
 name = "rayon-core"
-version = "1.12.0"
+version = "1.12.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5ce3fb6ad83f861aac485e76e1985cd109d9a3713802152be56c3b1f0e0658ed"
+checksum = "1465873a3dfdaa8ae7cb14b4383657caab0b3e8a0aa9ae8e04b044854c8dfce2"
 dependencies = [
  "crossbeam-deque",
  "crossbeam-utils",
@@ -3744,7 +3696,7 @@ version = "0.11.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "52c4f3084aa3bc7dfbba4eff4fab2a54db4324965d8872ab933565e6fbd83bc6"
 dependencies = [
- "pem 3.0.3",
+ "pem 3.0.4",
  "ring 0.16.20",
  "time",
  "yasna",
@@ -3752,18 +3704,18 @@ dependencies = [
 
 [[package]]
 name = "redox_syscall"
-version = "0.4.1"
+version = "0.5.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4722d768eff46b75989dd134e5c353f0d6296e5aaa3132e776cbdb56be7731aa"
+checksum = "2a908a6e00f1fdd0dfd9c0eb08ce85126f6d8bbda50017e74bc4a4b7d4a926a4"
 dependencies = [
- "bitflags 1.3.2",
+ "bitflags 2.6.0",
 ]
 
 [[package]]
 name = "redox_users"
-version = "0.4.4"
+version = "0.4.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a18479200779601e498ada4e8c1e1f50e3ee19deb0259c25825a98b5603b2cb4"
+checksum = "bd283d9651eeda4b2a83a43c1c91b266c40fd76ecd39a50a8c630ae69dc72891"
 dependencies = [
  "getrandom",
  "libredox",
@@ -3772,14 +3724,14 @@ dependencies = [
 
 [[package]]
 name = "regex"
-version = "1.10.2"
+version = "1.10.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "380b951a9c5e80ddfd6136919eef32310721aa4aacd4889a8d39124b026ab343"
+checksum = "b91213439dad192326a0d7c6ee3955910425f441d7038e0d6933b0aec5c4517f"
 dependencies = [
  "aho-corasick",
  "memchr",
- "regex-automata 0.4.3",
- "regex-syntax 0.8.2",
+ "regex-automata 0.4.7",
+ "regex-syntax 0.8.4",
 ]
 
 [[package]]
@@ -3793,13 +3745,13 @@ dependencies = [
 
 [[package]]
 name = "regex-automata"
-version = "0.4.3"
+version = "0.4.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5f804c7828047e88b2d32e2d7fe5a105da8ee3264f01902f796c8e067dc2483f"
+checksum = "38caf58cc5ef2fed281f89292ef23f6365465ed9a41b7a7754eb4e26496c92df"
 dependencies = [
  "aho-corasick",
  "memchr",
- "regex-syntax 0.8.2",
+ "regex-syntax 0.8.4",
 ]
 
 [[package]]
@@ -3810,23 +3762,17 @@ checksum = "f162c6dd7b008981e4d40210aca20b4bd0f9b60ca9271061b07f78537722f2e1"
 
 [[package]]
 name = "regex-syntax"
-version = "0.7.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dbb5fb1acd8a1a18b3dd5be62d25485eb770e05afb408a9627d14d451bae12da"
-
-[[package]]
-name = "regex-syntax"
-version = "0.8.2"
+version = "0.8.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c08c74e62047bb2de4ff487b251e4a92e24f48745648451635cec7d591162d9f"
+checksum = "7a66a03ae7c801facd77a29370b4faec201768915ac14a721ba36f20bc9c209b"
 
 [[package]]
 name = "reqwest"
-version = "0.11.22"
+version = "0.11.27"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "046cd98826c46c2ac8ddecae268eb5c2e58628688a5fc7a2643704a73faba95b"
+checksum = "dd67538700a17451e7cba03ac727fb961abb7607553461627b97de0b89cf4a62"
 dependencies = [
- "base64 0.21.5",
+ "base64 0.21.7",
  "bytes",
  "encoding_rs",
  "futures-core",
@@ -3843,11 +3789,12 @@ dependencies = [
  "once_cell",
  "percent-encoding",
  "pin-project-lite",
- "rustls",
+ "rustls 0.21.12",
  "rustls-pemfile",
  "serde",
  "serde_json",
  "serde_urlencoded",
+ "sync_wrapper",
  "system-configuration",
  "tokio",
  "tokio-rustls",
@@ -3897,16 +3844,17 @@ dependencies = [
 
 [[package]]
 name = "ring"
-version = "0.17.7"
+version = "0.17.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "688c63d65483050968b2a8937f7995f443e27041a0f7700aa59b0822aedebb74"
+checksum = "c17fa4cb658e3583423e915b9f3acc01cceaee1860e33d59ebae66adc3a2dc0d"
 dependencies = [
  "cc",
+ "cfg-if",
  "getrandom",
  "libc",
  "spin 0.9.8",
  "untrusted 0.9.0",
- "windows-sys 0.48.0",
+ "windows-sys 0.52.0",
 ]
 
 [[package]]
@@ -3957,9 +3905,9 @@ dependencies = [
 
 [[package]]
 name = "rustc-demangle"
-version = "0.1.23"
+version = "0.1.24"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d626bb9dae77e28219937af045c257c28bfd3f69333c512553507f5f9798cb76"
+checksum = "719b953e2095829ee67db738b3bfa9fa368c94900df327b3f07fe6e794d2fe1f"
 
 [[package]]
 name = "rustc-hash"
@@ -3993,11 +3941,11 @@ dependencies = [
 
 [[package]]
 name = "rustix"
-version = "0.38.28"
+version = "0.38.34"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "72e572a5e8ca657d7366229cdde4bd14c4eb5499a9573d4d366fe1b599daa316"
+checksum = "70dc5ec042f7a43c4a73241207cecc9873a06d45debb38b329f8541d85c2730f"
 dependencies = [
- "bitflags 2.4.1",
+ "bitflags 2.6.0",
  "errno",
  "libc",
  "linux-raw-sys",
@@ -4006,40 +3954,71 @@ dependencies = [
 
 [[package]]
 name = "rustls"
-version = "0.21.10"
+version = "0.21.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f9d5a6813c0759e4609cd494e8e725babae6a2ca7b62a5536a13daaec6fcb7ba"
+checksum = "3f56a14d1f48b391359b22f731fd4bd7e43c97f3c50eee276f3aa09c94784d3e"
 dependencies = [
  "log",
- "ring 0.17.7",
- "rustls-webpki",
+ "ring 0.17.8",
+ "rustls-webpki 0.101.7",
  "sct",
 ]
 
+[[package]]
+name = "rustls"
+version = "0.23.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c58f8c84392efc0a126acce10fa59ff7b3d2ac06ab451a33f2741989b806b044"
+dependencies = [
+ "once_cell",
+ "ring 0.17.8",
+ "rustls-pki-types",
+ "rustls-webpki 0.102.6",
+ "subtle",
+ "zeroize",
+]
+
 [[package]]
 name = "rustls-pemfile"
 version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1c74cae0a4cf6ccbbf5f359f08efdf8ee7e1dc532573bf0db71968cb56b1448c"
 dependencies = [
- "base64 0.21.5",
+ "base64 0.21.7",
 ]
 
+[[package]]
+name = "rustls-pki-types"
+version = "1.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "976295e77ce332211c0d24d92c0e83e50f5c5f046d11082cea19f3df13a3562d"
+
 [[package]]
 name = "rustls-webpki"
 version = "0.101.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8b6275d1ee7a1cd780b64aca7726599a1dbc893b1e64144529e55c3c2f745765"
 dependencies = [
- "ring 0.17.7",
+ "ring 0.17.8",
+ "untrusted 0.9.0",
+]
+
+[[package]]
+name = "rustls-webpki"
+version = "0.102.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8e6b52d4fda176fd835fdc55a835d4a89b8499cad995885a21149d5ad62f852e"
+dependencies = [
+ "ring 0.17.8",
+ "rustls-pki-types",
  "untrusted 0.9.0",
 ]
 
 [[package]]
 name = "rustversion"
-version = "1.0.14"
+version = "1.0.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7ffc183a10b4478d04cbbbfc96d0873219d962dd5accaff2ffbd4ceb7df837f4"
+checksum = "955d28af4278de8121b7ebeb796b6a45735dc01436d898801014aced2773a3d6"
 
 [[package]]
 name = "rw-stream-sink"
@@ -4054,9 +4033,9 @@ dependencies = [
 
 [[package]]
 name = "ryu"
-version = "1.0.16"
+version = "1.0.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f98d2aa92eebf49b69786be48e4477826b256916e84a57ff2a4f21923b48eb4c"
+checksum = "f3cb5ba0dc43242ce17de99c180e96db90b235b8a9fdc9543c96d2209116bd9f"
 
 [[package]]
 name = "salsa20"
@@ -4078,9 +4057,9 @@ dependencies = [
 
 [[package]]
 name = "scale-info"
-version = "2.10.0"
+version = "2.11.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7f7d66a1128282b7ef025a8ead62a4a9fcf017382ec53b8ffbf4d7bf77bd3c60"
+checksum = "eca070c12893629e2cc820a9761bedf6ce1dcddc9852984d1dc734b8bd9bd024"
 dependencies = [
  "cfg-if",
  "derive_more",
@@ -4090,11 +4069,11 @@ dependencies = [
 
 [[package]]
 name = "scale-info-derive"
-version = "2.10.0"
+version = "2.11.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "abf2c68b89cafb3b8d918dd07b42be0da66ff202cf1155c5739a4e0c1ea0dc19"
+checksum = "2d35494501194174bda522a32605929eefc9ecf7e0a326c26db1fdd85881eb62"
 dependencies = [
- "proc-macro-crate 1.3.1",
+ "proc-macro-crate",
  "proc-macro2",
  "quote",
  "syn 1.0.109",
@@ -4124,7 +4103,7 @@ version = "0.7.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "da046153aa2352493d6cb7da4b6e5c0c057d8a1d0a9aa8560baffdd945acd414"
 dependencies = [
- "ring 0.17.7",
+ "ring 0.17.8",
  "untrusted 0.9.0",
 ]
 
@@ -4144,9 +4123,9 @@ dependencies = [
 
 [[package]]
 name = "semver"
-version = "1.0.20"
+version = "1.0.23"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "836fa6a3e1e547f9a2c4040802ec865b5d85f4014efe00555d7090a3dcaa1090"
+checksum = "61697e0a1c7e512e84a621326239844a24d8207b4669b41bc18b32ea5cbf988b"
 dependencies = [
  "serde",
 ]
@@ -4165,40 +4144,41 @@ checksum = "cd0b0ec5f1c1ca621c432a25813d8d60c88abe6d3e08a3eb9cf37d97a0fe3d73"
 
 [[package]]
 name = "serde"
-version = "1.0.193"
+version = "1.0.204"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "25dd9975e68d0cb5aa1120c288333fc98731bd1dd12f561e468ea4728c042b89"
+checksum = "bc76f558e0cbb2a839d37354c575f1dc3fdc6546b5be373ba43d95f231bf7c12"
 dependencies = [
  "serde_derive",
 ]
 
 [[package]]
 name = "serde_derive"
-version = "1.0.193"
+version = "1.0.204"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "43576ca501357b9b071ac53cdc7da8ef0cbd9493d8df094cd821777ea6e894d3"
+checksum = "e0cd7e117be63d3c3678776753929474f3b04a43a080c744d6b0ae2a8c28e222"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.48",
+ "syn 2.0.72",
 ]
 
 [[package]]
 name = "serde_json"
-version = "1.0.108"
+version = "1.0.121"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3d1c7e3eac408d115102c4c24ad393e0821bb3a5df4d506a80f85f7a742a526b"
+checksum = "4ab380d7d9f22ef3f21ad3e6c1ebe8e4fc7a2000ccba2e4d71fc96f15b2cb609"
 dependencies = [
  "itoa",
+ "memchr",
  "ryu",
  "serde",
 ]
 
 [[package]]
 name = "serde_spanned"
-version = "0.6.4"
+version = "0.6.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "12022b835073e5b11e90a14f86838ceb1c8fb0325b72416845c487ac0fa95e80"
+checksum = "eb5b1b31579f3811bf615c144393417496f152e12ac8b7663bf664f4a815306d"
 dependencies = [
  "serde",
 ]
@@ -4258,18 +4238,18 @@ dependencies = [
 
 [[package]]
 name = "signal-hook-registry"
-version = "1.4.1"
+version = "1.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d8229b473baa5980ac72ef434c4415e70c4b5e71b423043adb4ba059f89c99a1"
+checksum = "a9e9e0b4211b72e7b8b6e85c807d36c212bdb33ea8587f7569562a84df5465b1"
 dependencies = [
  "libc",
 ]
 
 [[package]]
 name = "signature"
-version = "2.0.0"
+version = "2.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8fe458c98333f9c8152221191a77e2a44e8325d0193484af2e9421a53019e57d"
+checksum = "77549399552de45a898a580c1b41d445bf730df867cc44e6c0233bbc4b8329de"
 dependencies = [
  "digest",
  "rand_core",
@@ -4304,9 +4284,9 @@ dependencies = [
 
 [[package]]
 name = "smallvec"
-version = "1.11.2"
+version = "1.13.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4dccd0940a2dcdf68d092b8cbab7dc0ad8fa938bf95787e1b916b0e3d0e8e970"
+checksum = "3c5e1a9a646d36c3599cd173a41282daf47c44583ad367b8e6837255952e5c67"
 
 [[package]]
 name = "snow"
@@ -4319,7 +4299,7 @@ dependencies = [
  "chacha20poly1305",
  "curve25519-dalek",
  "rand_core",
- "ring 0.17.7",
+ "ring 0.17.8",
  "rustc_version",
  "sha2",
  "subtle",
@@ -4327,22 +4307,12 @@ dependencies = [
 
 [[package]]
 name = "socket2"
-version = "0.4.10"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9f7916fc008ca5542385b89a3d3ce689953c143e9304a9bf8beec1de48994c0d"
-dependencies = [
- "libc",
- "winapi",
-]
-
-[[package]]
-name = "socket2"
-version = "0.5.5"
+version = "0.5.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7b5fac59a5cb5dd637972e5fca70daf0523c9067fcdc4842f053dae04a18f8e9"
+checksum = "ce305eb0b4296696835b71df73eb912e0f1ffd2556a501fcede6e0c50349191c"
 dependencies = [
  "libc",
- "windows-sys 0.48.0",
+ "windows-sys 0.52.0",
 ]
 
 [[package]]
@@ -4351,7 +4321,7 @@ version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c425ce1c59f4b154717592f0bdf4715c3a1d55058883622d3157e1f0908a5b26"
 dependencies = [
- "itertools 0.11.0",
+ "itertools",
  "lalrpop",
  "lalrpop-util",
  "phf",
@@ -4402,43 +4372,43 @@ dependencies = [
 
 [[package]]
 name = "strsim"
-version = "0.10.0"
+version = "0.11.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "73473c0e59e6d5812c5dfe2a064a6444949f089e20eec9a2e5506596494e4623"
+checksum = "7da8b5736845d9f2fcb837ea5d9e2628564b3b043a70948a3f0b778838c5fb4f"
 
 [[package]]
 name = "strum"
-version = "0.25.0"
+version = "0.26.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "290d54ea6f91c969195bdbcd7442c8c2a2ba87da8bf60a7ee86a235d4bc1e125"
+checksum = "8fec0f0aef304996cf250b31b5a10dee7980c85da9d759361292b8bca5a18f06"
 dependencies = [
  "strum_macros",
 ]
 
 [[package]]
 name = "strum_macros"
-version = "0.25.3"
+version = "0.26.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "23dc1fa9ac9c169a78ba62f0b841814b7abae11bdd047b9c58f893439e309ea0"
+checksum = "4c6bee85a5a24955dc440386795aa378cd9cf82acd5f764469152d2270e581be"
 dependencies = [
- "heck",
+ "heck 0.5.0",
  "proc-macro2",
  "quote",
  "rustversion",
- "syn 2.0.48",
+ "syn 2.0.72",
 ]
 
 [[package]]
 name = "subtle"
-version = "2.5.0"
+version = "2.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "81cdd64d312baedb58e21336b31bc043b77e01cc99033ce76ef539f78e965ebc"
+checksum = "13c2bddecc57b384dee18652358fb23172facb8a2c51ccc10d74c157bdea3292"
 
 [[package]]
 name = "svm-rs"
-version = "0.3.3"
+version = "0.3.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "20689c7d03b6461b502d0b95d6c24874c7d24dea2688af80486a130a06af3b07"
+checksum = "11297baafe5fa0c99d5722458eac6a5e25c01eb1b8e5cd137f54079093daa7a4"
 dependencies = [
  "dirs",
  "fs2",
@@ -4467,25 +4437,30 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.48"
+version = "2.0.72"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0f3531638e407dfc0814761abb7c00a5b54992b849452a0646b7f65c9f770f3f"
+checksum = "dc4b9b9bf2add8093d3f2c0204471e951b2285580335de42f9d2534f3ae7a8af"
 dependencies = [
  "proc-macro2",
  "quote",
  "unicode-ident",
 ]
 
+[[package]]
+name = "sync_wrapper"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2047c6ded9c721764247e62cd3b03c09ffc529b2ba5b10ec482ae507a4a70160"
+
 [[package]]
 name = "synstructure"
-version = "0.12.6"
+version = "0.13.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f36bdaa60a83aca3921b5259d5400cbf5e90fc51931376a9bd4a0eb79aa7210f"
+checksum = "c8af7666ab7b6390ab78131fb5b0fce11d6b7a6951602017c35fa82800708971"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 1.0.109",
- "unicode-xid",
+ "syn 2.0.72",
 ]
 
 [[package]]
@@ -4517,15 +4492,14 @@ checksum = "55937e1799185b12863d447f42597ed69d9928686b8d88a1df17376a097d8369"
 
 [[package]]
 name = "tempfile"
-version = "3.8.1"
+version = "3.10.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7ef1adac450ad7f4b3c28589471ade84f25f731a7a0fe30d71dfa9f60fd808e5"
+checksum = "85b77fafb263dd9d05cbeac119526425676db3784113aa9295c88498cbf8bff1"
 dependencies = [
  "cfg-if",
  "fastrand",
- "redox_syscall",
  "rustix",
- "windows-sys 0.48.0",
+ "windows-sys 0.52.0",
 ]
 
 [[package]]
@@ -4541,29 +4515,29 @@ dependencies = [
 
 [[package]]
 name = "thiserror"
-version = "1.0.50"
+version = "1.0.63"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f9a7210f5c9a7156bb50aa36aed4c95afb51df0df00713949448cf9e97d382d2"
+checksum = "c0342370b38b6a11b6cc11d6a805569958d54cfa061a29969c3b5ce2ea405724"
 dependencies = [
  "thiserror-impl",
 ]
 
 [[package]]
 name = "thiserror-impl"
-version = "1.0.50"
+version = "1.0.63"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "266b2e40bc00e5a6c09c3584011e08b06f123c00362c92b975ba9843aaaa14b8"
+checksum = "a4558b58466b9ad7ca0f102865eccc95938dca1a74a856f2b57b6629050da261"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.48",
+ "syn 2.0.72",
 ]
 
 [[package]]
 name = "thread_local"
-version = "1.1.7"
+version = "1.1.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3fdd6f064ccff2d6567adcb3873ca630700f00b5ad3f060c25b5dcfd9a4ce152"
+checksum = "8b9ef9bad013ada3808854ceac7b46812a6465ba368859a37e2100283d2d719c"
 dependencies = [
  "cfg-if",
  "once_cell",
@@ -4571,12 +4545,13 @@ dependencies = [
 
 [[package]]
 name = "time"
-version = "0.3.30"
+version = "0.3.36"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c4a34ab300f2dee6e562c10a046fc05e358b29f9bf92277f30c3c8d82275f6f5"
+checksum = "5dfd88e563464686c916c7e46e623e520ddc6d79fa6641390f2e3fa86e83e885"
 dependencies = [
  "deranged",
  "itoa",
+ "num-conv",
  "powerfmt",
  "serde",
  "time-core",
@@ -4591,10 +4566,11 @@ checksum = "ef927ca75afb808a4d64dd374f00a2adf8d0fcff8e7b184af886c3c87ec4a3f3"
 
 [[package]]
 name = "time-macros"
-version = "0.2.15"
+version = "0.2.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4ad70d68dba9e1f8aceda7aa6711965dfec1cac869f311a51bd08b3a2ccbce20"
+checksum = "3f252a68540fde3a3877aeea552b832b40ab9a69e318efd078774a01ddee1ccf"
 dependencies = [
+ "num-conv",
  "time-core",
 ]
 
@@ -4609,9 +4585,9 @@ dependencies = [
 
 [[package]]
 name = "tinyvec"
-version = "1.6.0"
+version = "1.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "87cc5ceb3875bb20c2890005a4e226a4651264a5c75edb2421b52861a0a0cb50"
+checksum = "445e881f4f6d382d5f27c034e25eb92edd7c784ceab92a0937db7f2e9471b938"
 dependencies = [
  "tinyvec_macros",
 ]
@@ -4624,31 +4600,30 @@ checksum = "1f3ccbac311fea05f86f61904b462b55fb3df8837a366dfc601a0161d0532f20"
 
 [[package]]
 name = "tokio"
-version = "1.35.0"
+version = "1.39.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "841d45b238a16291a4e1584e61820b8ae57d696cc5015c459c229ccc6990cc1c"
+checksum = "daa4fb1bc778bd6f04cbfc4bb2d06a7396a8f299dc33ea1900cedaa316f467b1"
 dependencies = [
  "backtrace",
  "bytes",
  "libc",
  "mio",
- "num_cpus",
  "pin-project-lite",
  "signal-hook-registry",
- "socket2 0.5.5",
+ "socket2",
  "tokio-macros",
- "windows-sys 0.48.0",
+ "windows-sys 0.52.0",
 ]
 
 [[package]]
 name = "tokio-macros"
-version = "2.2.0"
+version = "2.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5b8a1e28f2deaa14e508979454cb3a223b10b938b45af148bc0986de36f1923b"
+checksum = "693d596312e88961bc67d7f1f97af8a70227d9f90c31bba5806eec004978d752"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.48",
+ "syn 2.0.72",
 ]
 
 [[package]]
@@ -4657,15 +4632,15 @@ version = "0.24.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c28327cf380ac148141087fbfb9de9d7bd4e84ab5d2c28fbc911d753de8a7081"
 dependencies = [
- "rustls",
+ "rustls 0.21.12",
  "tokio",
 ]
 
 [[package]]
 name = "tokio-stream"
-version = "0.1.14"
+version = "0.1.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "397c988d37662c7dda6d2208364a706264bf3d6138b11d436cbac0ad38832842"
+checksum = "267ac89e0bec6e691e5813911606935d77c476ff49024f98abcea3e7b15e37af"
 dependencies = [
  "futures-core",
  "pin-project-lite",
@@ -4680,7 +4655,7 @@ checksum = "212d5dcb2a1ce06d81107c3d0ffa3121fe974b73f068c8282cb1c32328113b6c"
 dependencies = [
  "futures-util",
  "log",
- "rustls",
+ "rustls 0.21.12",
  "tokio",
  "tokio-rustls",
  "tungstenite",
@@ -4689,72 +4664,60 @@ dependencies = [
 
 [[package]]
 name = "tokio-util"
-version = "0.7.10"
+version = "0.7.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5419f34732d9eb6ee4c3578b7989078579b7f039cbbb9ca2c4da015749371e15"
+checksum = "9cf6b47b3771c49ac75ad09a6162f53ad4b8088b76ac60e8ec1455b31a189fe1"
 dependencies = [
  "bytes",
  "futures-core",
  "futures-sink",
  "pin-project-lite",
  "tokio",
- "tracing",
 ]
 
 [[package]]
 name = "toml"
-version = "0.8.8"
+version = "0.8.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a1a195ec8c9da26928f773888e0742ca3ca1040c6cd859c919c9f59c1954ab35"
+checksum = "a1ed1f98e3fdc28d6d910e6737ae6ab1a93bf1985935a1193e68f93eeb68d24e"
 dependencies = [
  "serde",
  "serde_spanned",
  "toml_datetime",
- "toml_edit 0.21.0",
+ "toml_edit 0.22.20",
 ]
 
 [[package]]
 name = "toml_datetime"
-version = "0.6.5"
+version = "0.6.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3550f4e9685620ac18a50ed434eb3aec30db8ba93b0287467bca5826ea25baf1"
+checksum = "0dd7358ecb8fc2f8d014bf86f6f638ce72ba252a2c3a2572f2a795f1d23efb41"
 dependencies = [
  "serde",
 ]
 
 [[package]]
 name = "toml_edit"
-version = "0.19.15"
+version = "0.21.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1b5bb770da30e5cbfde35a2d7b9b8a2c4b8ef89548a7a6aeab5c9a576e3e7421"
+checksum = "6a8534fd7f78b5405e860340ad6575217ce99f38d4d5c8f2442cb5ecb50090e1"
 dependencies = [
  "indexmap",
  "toml_datetime",
- "winnow",
+ "winnow 0.5.40",
 ]
 
 [[package]]
 name = "toml_edit"
-version = "0.20.2"
+version = "0.22.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "396e4d48bbb2b7554c944bde63101b5ae446cff6ec4a24227428f15eb72ef338"
-dependencies = [
- "indexmap",
- "toml_datetime",
- "winnow",
-]
-
-[[package]]
-name = "toml_edit"
-version = "0.21.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d34d383cd00a163b4a5b85053df514d45bc330f6de7737edfe0a93311d1eaa03"
+checksum = "583c44c02ad26b0c3f3066fe629275e50627026c51ac2e595cca4c230ce1ce1d"
 dependencies = [
  "indexmap",
  "serde",
  "serde_spanned",
  "toml_datetime",
- "winnow",
+ "winnow 0.6.18",
 ]
 
 [[package]]
@@ -4782,7 +4745,7 @@ checksum = "34704c8d6ebcbc939824180af020566b01a7c01f80641264eba0999f6c2b6be7"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.48",
+ "syn 2.0.72",
 ]
 
 [[package]]
@@ -4866,7 +4829,7 @@ dependencies = [
  "httparse",
  "log",
  "rand",
- "rustls",
+ "rustls 0.21.12",
  "sha1",
  "thiserror",
  "url",
@@ -4899,9 +4862,9 @@ checksum = "eaea85b334db583fe3274d12b4cd1880032beab409c0d774be044d4480ab9a94"
 
 [[package]]
 name = "unicode-bidi"
-version = "0.3.14"
+version = "0.3.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6f2528f27a9eb2b21e69c95319b30bd0efd85d09c379741b0f78ea1d86be2416"
+checksum = "08f95100a766bf4f8f28f90d77e0a5461bbdb219042e7679bebe79004fed8d75"
 
 [[package]]
 name = "unicode-ident"
@@ -4911,9 +4874,9 @@ checksum = "3354b9ac3fae1ff6755cb6db53683adb661634f67557942dea4facebec0fee4b"
 
 [[package]]
 name = "unicode-normalization"
-version = "0.1.22"
+version = "0.1.23"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5c5713f0fc4b5db668a2ac63cdb7bb4469d8c9fed047b1d0292cc7b0ce2ba921"
+checksum = "a56d1686db2308d901306f92a263857ef59ea39678a5458e7cb17f01415101f5"
 dependencies = [
  "tinyvec",
 ]
@@ -4960,9 +4923,9 @@ checksum = "8ecb6da28b8a351d773b68d5825ac39017e680750f980f3a1a85cd8dd28a47c1"
 
 [[package]]
 name = "url"
-version = "2.5.0"
+version = "2.5.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "31e6302e3bb753d46e83516cae55ae196fc0c309407cf11ab35cc51a4c2a4633"
+checksum = "22784dbdf76fdde8af1aeda5622b546b422b6fc585325248a2bf9f5e41e94d6c"
 dependencies = [
  "form_urlencoded",
  "idna 0.5.0",
@@ -4977,9 +4940,9 @@ checksum = "09cc8ee72d2a9becf2f2febe0205bbed8fc6615b7cb429ad062dc7b7ddd036a9"
 
 [[package]]
 name = "utf8parse"
-version = "0.2.1"
+version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "711b9620af191e0cdc7468a8d14e709c3dcdb115b36f838e601583af800a370a"
+checksum = "06abde3611657adf66d383f00b093d7faecc7fa57071cce2578660c9f1010821"
 
 [[package]]
 name = "uuid"
@@ -4999,9 +4962,9 @@ checksum = "830b7e5d4d90034032940e4ace0d9a9a057e7a45cd94e6c007832e39edb82f6d"
 
 [[package]]
 name = "version_check"
-version = "0.9.4"
+version = "0.9.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "49874b5167b65d7193b8aba1567f5c7d93d001cafc34600cee003eda787e483f"
+checksum = "0b928f33d975fc6ad9f86c8f283853ad26bdd5b10b7f1542aa2fa15e2289105a"
 
 [[package]]
 name = "void"
@@ -5011,9 +4974,9 @@ checksum = "6a02e4885ed3bc0f2de90ea6dd45ebcbb66dacffe03547fadbb0eeae2770887d"
 
 [[package]]
 name = "walkdir"
-version = "2.4.0"
+version = "2.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d71d857dc86794ca4c280d616f7da00d2dbfd8cd788846559a6813e6aa4b54ee"
+checksum = "29790946404f91d9c5d06f9874efddea1dc06c5efe94541a7d6863108e3a5e4b"
 dependencies = [
  "same-file",
  "winapi-util",
@@ -5036,9 +4999,9 @@ checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
 
 [[package]]
 name = "wasm-bindgen"
-version = "0.2.89"
+version = "0.2.92"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0ed0d4f68a3015cc185aff4db9506a015f4b96f95303897bfa23f846db54064e"
+checksum = "4be2531df63900aeb2bca0daaaddec08491ee64ceecbee5076636a3b026795a8"
 dependencies = [
  "cfg-if",
  "wasm-bindgen-macro",
@@ -5046,24 +5009,24 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-backend"
-version = "0.2.89"
+version = "0.2.92"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1b56f625e64f3a1084ded111c4d5f477df9f8c92df113852fa5a374dbda78826"
+checksum = "614d787b966d3989fa7bb98a654e369c762374fd3213d212cfc0251257e747da"
 dependencies = [
  "bumpalo",
  "log",
  "once_cell",
  "proc-macro2",
  "quote",
- "syn 2.0.48",
+ "syn 2.0.72",
  "wasm-bindgen-shared",
 ]
 
 [[package]]
 name = "wasm-bindgen-futures"
-version = "0.4.39"
+version = "0.4.42"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ac36a15a220124ac510204aec1c3e5db8a22ab06fd6706d881dc6149f8ed9a12"
+checksum = "76bc14366121efc8dbb487ab05bcc9d346b3b5ec0eaa76e46594cabbe51762c0"
 dependencies = [
  "cfg-if",
  "js-sys",
@@ -5073,9 +5036,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-macro"
-version = "0.2.89"
+version = "0.2.92"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0162dbf37223cd2afce98f3d0785506dcb8d266223983e4b5b525859e6e182b2"
+checksum = "a1f8823de937b71b9460c0c34e25f3da88250760bec0ebac694b49997550d726"
 dependencies = [
  "quote",
  "wasm-bindgen-macro-support",
@@ -5083,28 +5046,38 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-macro-support"
-version = "0.2.89"
+version = "0.2.92"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f0eb82fcb7930ae6219a7ecfd55b217f5f0893484b7a13022ebb2b2bf20b5283"
+checksum = "e94f17b526d0a461a191c78ea52bbce64071ed5c04c9ffe424dcb38f74171bb7"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.48",
+ "syn 2.0.72",
  "wasm-bindgen-backend",
  "wasm-bindgen-shared",
 ]
 
 [[package]]
 name = "wasm-bindgen-shared"
-version = "0.2.89"
+version = "0.2.92"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7ab9b36309365056cd639da3134bf87fa8f3d86008abf99e612384a6eecd459f"
+checksum = "af190c94f2773fdb3729c55b007a722abb5384da03bc0986df4c289bf5567e96"
 
 [[package]]
 name = "web-sys"
-version = "0.3.66"
+version = "0.3.69"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "50c24a44ec86bb68fbecd1b3efed7e85ea5621b39b35ef2766b66cd984f8010f"
+checksum = "77afa9a11836342370f4817622a2f0f418b134426d91a82dfb48f532d2ec13ef"
+dependencies = [
+ "js-sys",
+ "wasm-bindgen",
+]
+
+[[package]]
+name = "web-time"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5a6580f308b1fad9207618087a65c04e7a10bc77e02c8e84e9b00dd4b12fa0bb"
 dependencies = [
  "js-sys",
  "wasm-bindgen",
@@ -5112,15 +5085,15 @@ dependencies = [
 
 [[package]]
 name = "webpki-roots"
-version = "0.25.3"
+version = "0.25.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1778a42e8b3b90bff8d0f5032bf22250792889a5cdc752aa0020c84abe3aaf10"
+checksum = "5f20c57d8d7db6d3b86154206ae5d8fba62dd39573114de97c2cb0578251f8e1"
 
 [[package]]
 name = "widestring"
-version = "1.0.2"
+version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "653f141f39ec16bba3c5abe400a0c60da7468261cc2cbf36805022876bc721a8"
+checksum = "7219d36b6eac893fa81e84ebe06485e7dcbb616177469b142df14f1f4deb1311"
 
 [[package]]
 name = "winapi"
@@ -5140,11 +5113,11 @@ checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
 
 [[package]]
 name = "winapi-util"
-version = "0.1.6"
+version = "0.1.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f29e6f9198ba0d26b4c9f07dbe6f9ed633e1f3d5b8b414090084349e46a52596"
+checksum = "4d4cc384e1e73b93bafa6fb4f1df8c41695c8a91cf9c4c64358067d15a7b6c6b"
 dependencies = [
- "winapi",
+ "windows-sys 0.52.0",
 ]
 
 [[package]]
@@ -5187,7 +5160,7 @@ version = "0.52.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "282be5f36a8ce781fad8c8ae18fa3f9beff57ec1b52cb3de0789201425d9a33d"
 dependencies = [
- "windows-targets 0.52.0",
+ "windows-targets 0.52.6",
 ]
 
 [[package]]
@@ -5207,17 +5180,18 @@ dependencies = [
 
 [[package]]
 name = "windows-targets"
-version = "0.52.0"
+version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8a18201040b24831fbb9e4eb208f8892e1f50a37feb53cc7ff887feb8f50e7cd"
+checksum = "9b724f72796e036ab90c1021d4780d4d3d648aca59e491e6b98e725b84e99973"
 dependencies = [
- "windows_aarch64_gnullvm 0.52.0",
- "windows_aarch64_msvc 0.52.0",
- "windows_i686_gnu 0.52.0",
- "windows_i686_msvc 0.52.0",
- "windows_x86_64_gnu 0.52.0",
- "windows_x86_64_gnullvm 0.52.0",
- "windows_x86_64_msvc 0.52.0",
+ "windows_aarch64_gnullvm 0.52.6",
+ "windows_aarch64_msvc 0.52.6",
+ "windows_i686_gnu 0.52.6",
+ "windows_i686_gnullvm",
+ "windows_i686_msvc 0.52.6",
+ "windows_x86_64_gnu 0.52.6",
+ "windows_x86_64_gnullvm 0.52.6",
+ "windows_x86_64_msvc 0.52.6",
 ]
 
 [[package]]
@@ -5228,9 +5202,9 @@ checksum = "2b38e32f0abccf9987a4e3079dfb67dcd799fb61361e53e2882c3cbaf0d905d8"
 
 [[package]]
 name = "windows_aarch64_gnullvm"
-version = "0.52.0"
+version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cb7764e35d4db8a7921e09562a0304bf2f93e0a51bfccee0bd0bb0b666b015ea"
+checksum = "32a4622180e7a0ec044bb555404c800bc9fd9ec262ec147edd5989ccd0c02cd3"
 
 [[package]]
 name = "windows_aarch64_msvc"
@@ -5240,9 +5214,9 @@ checksum = "dc35310971f3b2dbbf3f0690a219f40e2d9afcf64f9ab7cc1be722937c26b4bc"
 
 [[package]]
 name = "windows_aarch64_msvc"
-version = "0.52.0"
+version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bbaa0368d4f1d2aaefc55b6fcfee13f41544ddf36801e793edbbfd7d7df075ef"
+checksum = "09ec2a7bb152e2252b53fa7803150007879548bc709c039df7627cabbd05d469"
 
 [[package]]
 name = "windows_i686_gnu"
@@ -5252,9 +5226,15 @@ checksum = "a75915e7def60c94dcef72200b9a8e58e5091744960da64ec734a6c6e9b3743e"
 
 [[package]]
 name = "windows_i686_gnu"
-version = "0.52.0"
+version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a28637cb1fa3560a16915793afb20081aba2c92ee8af57b4d5f28e4b3e7df313"
+checksum = "8e9b5ad5ab802e97eb8e295ac6720e509ee4c243f69d781394014ebfe8bbfa0b"
+
+[[package]]
+name = "windows_i686_gnullvm"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0eee52d38c090b3caa76c563b86c3a4bd71ef1a819287c19d586d7334ae8ed66"
 
 [[package]]
 name = "windows_i686_msvc"
@@ -5264,9 +5244,9 @@ checksum = "8f55c233f70c4b27f66c523580f78f1004e8b5a8b659e05a4eb49d4166cca406"
 
 [[package]]
 name = "windows_i686_msvc"
-version = "0.52.0"
+version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ffe5e8e31046ce6230cc7215707b816e339ff4d4d67c65dffa206fd0f7aa7b9a"
+checksum = "240948bc05c5e7c6dabba28bf89d89ffce3e303022809e73deaefe4f6ec56c66"
 
 [[package]]
 name = "windows_x86_64_gnu"
@@ -5276,9 +5256,9 @@ checksum = "53d40abd2583d23e4718fddf1ebec84dbff8381c07cae67ff7768bbf19c6718e"
 
 [[package]]
 name = "windows_x86_64_gnu"
-version = "0.52.0"
+version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3d6fa32db2bc4a2f5abeacf2b69f7992cd09dca97498da74a151a3132c26befd"
+checksum = "147a5c80aabfbf0c7d901cb5895d1de30ef2907eb21fbbab29ca94c5b08b1a78"
 
 [[package]]
 name = "windows_x86_64_gnullvm"
@@ -5288,9 +5268,9 @@ checksum = "0b7b52767868a23d5bab768e390dc5f5c55825b6d30b86c844ff2dc7414044cc"
 
 [[package]]
 name = "windows_x86_64_gnullvm"
-version = "0.52.0"
+version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1a657e1e9d3f514745a572a6846d3c7aa7dbe1658c056ed9c3344c4109a6949e"
+checksum = "24d5b23dc417412679681396f2b49f3de8c1473deb516bd34410872eff51ed0d"
 
 [[package]]
 name = "windows_x86_64_msvc"
@@ -5300,15 +5280,24 @@ checksum = "ed94fce61571a4006852b7389a063ab983c02eb1bb37b47f8272ce92d06d9538"
 
 [[package]]
 name = "windows_x86_64_msvc"
-version = "0.52.0"
+version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dff9641d1cd4be8d1a070daf9e3773c5f67e78b4d9d42263020c057706765c04"
+checksum = "589f6da84c646204747d1270a2a5661ea66ed1cced2631d546fdfb155959f9ec"
 
 [[package]]
 name = "winnow"
-version = "0.5.28"
+version = "0.5.40"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6c830786f7720c2fd27a1a0e27a709dbd3c4d009b56d098fc742d4f4eab91fe2"
+checksum = "f593a95398737aeed53e489c785df13f3618e41dbcd6718c6addbf1395aa6876"
+dependencies = [
+ "memchr",
+]
+
+[[package]]
+name = "winnow"
+version = "0.6.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "68a9bda4691f099d435ad181000724da8e5899daa10713c2d432552b9ccd3a6f"
 dependencies = [
  "memchr",
 ]
@@ -5353,9 +5342,9 @@ dependencies = [
 
 [[package]]
 name = "x25519-dalek"
-version = "2.0.0"
+version = "2.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fb66477291e7e8d2b0ff1bcb900bf29489a9692816d79874bea351e7a8b6de96"
+checksum = "c7e468321c81fb07fa7f4c636c3972b9100f0346e5b6a9f2bd0603a52f7ed277"
 dependencies = [
  "curve25519-dalek",
  "rand_core",
@@ -5365,9 +5354,9 @@ dependencies = [
 
 [[package]]
 name = "x509-parser"
-version = "0.15.1"
+version = "0.16.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7069fba5b66b9193bd2c5d3d4ff12b839118f6bcbef5328efafafb5395cf63da"
+checksum = "fcbc162f30700d6f3f82a24bf7cc62ffe7caea42c0b2cba8bf7f3ae50cf51f69"
 dependencies = [
  "asn1-rs",
  "data-encoding",
@@ -5382,9 +5371,9 @@ dependencies = [
 
 [[package]]
 name = "xml-rs"
-version = "0.8.19"
+version = "0.8.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0fcb9cbac069e033553e8bb871be2fbdffcab578eb25bd0f7c508cedc6dcd75a"
+checksum = "791978798f0597cfc70478424c2b4fdc2b7a8024aaff78497ef00f24ef674193"
 
 [[package]]
 name = "xmltree"
@@ -5412,18 +5401,18 @@ dependencies = [
 
 [[package]]
 name = "yamux"
-version = "0.13.1"
+version = "0.13.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ad1d0148b89300047e72994bee99ecdabd15a9166a7b70c8b8c37c314dcc9002"
+checksum = "a31b5e376a8b012bee9c423acdbb835fc34d45001cfa3106236a624e4b738028"
 dependencies = [
  "futures",
- "instant",
  "log",
  "nohash-hasher",
  "parking_lot",
  "pin-project",
  "rand",
  "static_assertions",
+ "web-time",
 ]
 
 [[package]]
@@ -5443,29 +5432,50 @@ dependencies = [
 
 [[package]]
 name = "zerocopy"
-version = "0.7.31"
+version = "0.6.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "854e949ac82d619ee9a14c66a1b674ac730422372ccb759ce0c39cabcf2bf8e6"
+dependencies = [
+ "byteorder",
+ "zerocopy-derive 0.6.6",
+]
+
+[[package]]
+name = "zerocopy"
+version = "0.7.35"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1b9b4fd18abc82b8136838da5d50bae7bdea537c574d8dc1a34ed098d6c166f0"
+dependencies = [
+ "zerocopy-derive 0.7.35",
+]
+
+[[package]]
+name = "zerocopy-derive"
+version = "0.6.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1c4061bedbb353041c12f413700357bec76df2c7e2ca8e4df8bac24c6bf68e3d"
+checksum = "125139de3f6b9d625c39e2efdd73d41bdac468ccd556556440e322be0e1bbd91"
 dependencies = [
- "zerocopy-derive",
+ "proc-macro2",
+ "quote",
+ "syn 2.0.72",
 ]
 
 [[package]]
 name = "zerocopy-derive"
-version = "0.7.31"
+version = "0.7.35"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b3c129550b3e6de3fd0ba67ba5c81818f9805e58b8d7fee80a3a59d2c9fc601a"
+checksum = "fa4f8080344d4671fb4e831a13ad1e68092748387dfc4f55e356242fae12ce3e"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.48",
+ "syn 2.0.72",
 ]
 
 [[package]]
 name = "zeroize"
-version = "1.7.0"
+version = "1.8.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "525b4ec142c6b68a2d10f01f7bbf6755599ca3f81ea53b8431b7dd348f5fdb2d"
+checksum = "ced3678a2879b30306d323f4542626697a464a97c0a07c9aebf7ebca65cd4dde"
 dependencies = [
  "zeroize_derive",
 ]
@@ -5478,7 +5488,7 @@ checksum = "ce36e65b0d2999d2aafac989fb249189a141aee1f53c612c1f37d72631959f69"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.48",
+ "syn 2.0.72",
 ]
 
 [[package]]
@@ -5522,9 +5532,9 @@ dependencies = [
 
 [[package]]
 name = "zstd-sys"
-version = "2.0.9+zstd.1.5.5"
+version = "2.0.12+zstd.1.5.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9e16efa8a874a0481a574084d34cc26fdb3b99627480f785888deb6386506656"
+checksum = "0a4e40c320c3cb459d9a9ff6de98cff88f4751ee9275d140e2be94a2b74e4c13"
 dependencies = [
  "cc",
  "pkg-config",
diff --git a/bridge-validators/README.md b/bridge-validators/README.md
index 166ac07..a761e09 100644
--- a/bridge-validators/README.md
+++ b/bridge-validators/README.md
@@ -1,4 +1,33 @@
-# Testing information
+# The bridge validator
+
+This directory contains software that acts as a trivial bridge validator. It
+accepts a configuration file - of which there is an example in
+`config.toml` - and listens on the configured chains, relaying events
+from the configured chain gateways.
+
+The configuration is defined in `src/main.rs`.
+
+There are a few options you can pass:
+
+```sh
+--config-file <file>   : Use this config file.
+
+--is-leader            : if true, we will be the validator node that
+                         sends transactions to the target chain.
+
+--dispatch-history     : if true, we will go through all of history from
+                         chain_gateway_block_deployed and dispatch all relay
+                         transactions, to make sure we don't miss any in
+                         the gap between a previous instance dying and this
+                         instance starting. If false, we start at the current
+                         block.
+
+--help                 : help text.
+```
+
+## Testing information
+
+You can generate log data using `RUST_LOG=info`.
 
 1.Run two anvil chains:
 
diff --git a/bridge-validators/config.toml b/bridge-validators/config.toml
index 5180b45..81994ca 100644
--- a/bridge-validators/config.toml
+++ b/bridge-validators/config.toml
@@ -5,9 +5,36 @@
 
 # BSC Testnet
 [[chain_configs]]
+## The block at which history replay should start.
 chain_gateway_block_deployed = 36696045
+## RPC URL to talk to for this chain.
 rpc_url = "https://bsc-prebsc-dataseed.bnbchain.org"
-chain_gateway_address = "0x72B9B59e48779A8b64554A3e2bC8b5297A04c68a"
+## The (EVM) address of the chain gateway contract
+##  - events from anywhere else will be ignored.
+##  - relay requests for this chain id will be relayed to this contract.
+chain_gateway_address = "0xa9A14C90e53EdCD89dFd201A3bF94D867f8098fE"
+## If this key is absent, we submit relay transactions with "enough" gas per eth_estimateGas().
+## Most chains seem to have problems with this, and so this key exists to allow you to
+## submit legacy_gas_estimation_percent percent of the estimated gas, so as to ensure that
+## relay txns don't run out of gas. A value of 130-150 seems to work for coin transfers.
+legacy_gas_estimation_percent = 130
+## If this key is present, we delay scanning a block until N blocks ahead of it have been
+## produced, to give some chains time to propagate block data to the nodes from which we are
+## attempting to read them.
+## scan_behind_blocks = 1
+
+## If this is set true (Zilliqa 1 again!), we assume that any block we see is final.
+## Otherwise (every other chain), we ask for the latest finalized block and scan that.
+## block_instant_finality = true
+
+## Normally, we use eth_getFilterLogs() to fetch relay events for processing.
+## Some chains (Zilliqa 1) will sometimes get into a state where they return [] for eth_getFilterLogs()
+## regardless of the actual emitted logs for a block. This obviously confuses us.
+## Worse, eth_getBlockReceipts() has the same problem.
+## So, if you set this to true, we will call eth_getBlock() and then iterate through each transaction
+## fetching the receipt and scanning it for relevant logs. This is slow, but at least it works ..
+## use_get_transactions = true
+
 
 # BSC Mainnet
 # [[chain_configs]]
@@ -27,9 +54,9 @@ chain_gateway_address = "0x72B9B59e48779A8b64554A3e2bC8b5297A04c68a"
 [[chain_configs]]
 chain_gateway_block_deployed = 6542681
 rpc_url = "https://dev-api.zilliqa.com"
-chain_gateway_address = "0x10917A34FE60eE8364a401a6b1d3adaf80D84eb6"
+chain_gateway_address = "0x7370e69565BB2313C4dA12F9062C282513919230"
 block_instant_finality = true
-legacy_gas_estimation = true
+legacy_gas_estimation_percent = 130
 
 # Zilliqa Mainnet
 # [[chain_configs]]
diff --git a/bridge-validators/infra/config-leader.toml b/bridge-validators/infra/config-leader.toml
index 57c5008..596fa29 100644
--- a/bridge-validators/infra/config-leader.toml
+++ b/bridge-validators/infra/config-leader.toml
@@ -2,7 +2,8 @@
 [[chain_configs]]
 chain_gateway_block_deployed = 36696045
 rpc_url = "https://bsc-prebsc-dataseed.bnbchain.org"
-chain_gateway_address = "0x72B9B59e48779A8b64554A3e2bC8b5297A04c68a"
+chain_gateway_address = "0xa9A14C90e53EdCD89dFd201A3bF94D867f8098fE"
+legacy_gas_estimation_percent = 150
 
 # BSC Mainnet
 # [[chain_configs]]
@@ -24,7 +25,7 @@ chain_gateway_block_deployed = 6542681
 rpc_url = "https://evm-api-xbridge.testnet.zilliqa.com"
 chain_gateway_address = "0x10917A34FE60eE8364a401a6b1d3adaf80D84eb6"
 block_instant_finality = true
-legacy_gas_estimation = true
+legacy_gas_estimation_percent = 130
 
 # Zilliqa Mainnet
 # [[chain_configs]]
diff --git a/bridge-validators/infra/config.toml b/bridge-validators/infra/config.toml
index 2d93c94..c950ee0 100644
--- a/bridge-validators/infra/config.toml
+++ b/bridge-validators/infra/config.toml
@@ -7,7 +7,8 @@
 [[chain_configs]]
 chain_gateway_block_deployed = 36696045
 rpc_url = "https://bsc-prebsc-dataseed.bnbchain.org"
-chain_gateway_address = "0x72B9B59e48779A8b64554A3e2bC8b5297A04c68a"
+chain_gateway_address = "0xa9A14C90e53EdCD89dFd201A3bF94D867f8098fE"
+legacy_gas_estimation_percent = 150
 
 # BSC Mainnet
 # [[chain_configs]]
@@ -29,7 +30,7 @@ chain_gateway_block_deployed = 6542681
 rpc_url = "https://evm-api-xbridge.testnet.zilliqa.com"
 chain_gateway_address = "0x10917A34FE60eE8364a401a6b1d3adaf80D84eb6"
 block_instant_finality = true
-legacy_gas_estimation = true
+legacy_gas_estimation_percent = 130
 
 # Zilliqa Mainnet
 # [[chain_configs]]
diff --git a/bridge-validators/src/block.rs b/bridge-validators/src/block.rs
index a65e0ca..daf95a3 100644
--- a/bridge-validators/src/block.rs
+++ b/bridge-validators/src/block.rs
@@ -3,33 +3,117 @@ use std::{marker::PhantomData, time::Duration};
 use async_stream::try_stream;
 use async_trait::async_trait;
 
-use anyhow::Result;
+use anyhow::{anyhow, Result};
 use ethers::{
     providers::Middleware,
-    types::{BlockNumber, Filter, Log, U64},
+    types::{Address, Block, BlockNumber, Filter, Log, TxHash, ValueOrArray, U64},
 };
 use ethers_contract::{parse_log, EthEvent};
 use futures::{Stream, StreamExt, TryStreamExt};
 use tokio::time::interval;
 use tracing::{debug, info, warn};
 
-use crate::client::ChainClient;
+use crate::client::{ChainClient, LogStrategy};
 
 #[async_trait]
 pub trait BlockPolling {
+    #[allow(dead_code)]
     async fn stream_finalized_blocks(&mut self) -> Result<()>;
+    #[allow(dead_code)]
     async fn get_historic_blocks(&self, from: u64, to: u64) -> Result<()>;
 
-    async fn get_events<D>(
-        &self,
-        event: Filter,
-        from_block: BlockNumber,
-        to_block: BlockNumber,
-    ) -> Result<Vec<D>>
+    async fn get_events<D>(&self, event: Filter, from_block: u64, to_block: u64) -> Result<Vec<D>>
     where
         D: EthEvent;
 }
 
+impl ChainClient {
+    async fn get_logs_from_blocks(&self, event: Filter) -> Result<Vec<Log>> {
+        // Fetch transactions for all the blocks in Filter.
+        let mut result: Vec<Log> = Vec::new();
+        let from_block: u64 = event
+            .get_from_block()
+            .ok_or(anyhow!(
+                "from_block is not present in get_logs_from_blocks()"
+            ))?
+            .as_u64();
+        let to_block: u64 = event
+            .get_to_block()
+            .ok_or(anyhow!("to_block is not present in get_logs_from_blocks()"))?
+            .as_u64();
+        for block_number in from_block..to_block + 1 {
+            // eth_GetBlockReceipts is as broken as eth_getLogs, so we need to check each transaction
+            // individually. Joy!
+            let the_block: Option<Block<TxHash>> =
+                self.client.provider().get_block(block_number).await?;
+            if let Some(block) = the_block {
+                // go through all the transactions
+                for txn_hash in block.transactions {
+                    // We have a transaction. Did it have any logs?
+                    debug!("block {} txn {:#x}", block_number, txn_hash);
+                    // Get the receipt
+                    let maybe_receipt = self
+                        .client
+                        .provider()
+                        .get_transaction_receipt(txn_hash)
+                        .await?;
+                    if let Some(receipt) = maybe_receipt {
+                        // Yay!
+                        info!("Got receipt for txn {:#x}", txn_hash);
+                        for log in receipt.logs {
+                            // Because FML, the filter doesn't actually include the address.
+                            if log.address != self.chain_gateway_address {
+                                info!(
+                                    "[1] event from {0:#x} != chain_gateway({1:#x})",
+                                    log.address, self.chain_gateway_address
+                                );
+                                continue;
+                            }
+                            let mut matches: bool = true;
+                            for topic_idx in 0..event.topics.len() {
+                                if let Some(x) = &event.topics[topic_idx] {
+                                    if let Some(y) = &log.topics.get(topic_idx) {
+                                        let match_this_topic = match x {
+                                            ValueOrArray::Value(xv) => {
+                                                if let Some(xxv) = xv {
+                                                    xxv == *y
+                                                } else {
+                                                    true
+                                                }
+                                            }
+                                            ValueOrArray::Array(xvs) => xvs.iter().any(|cand| {
+                                                if let Some(xcand) = cand {
+                                                    *xcand == **y
+                                                } else {
+                                                    false
+                                                }
+                                            }),
+                                        };
+                                        if !match_this_topic {
+                                            matches = false;
+                                            break;
+                                        }
+                                    } else {
+                                        matches = false;
+                                        break;
+                                    }
+                                }
+                                // If there's no filter element for this topic, we're fine.
+                            }
+                            if matches {
+                                result.push(log);
+                            }
+                        }
+                    } else {
+                        warn!("WARNING: txn {:#x} has no receipt", txn_hash);
+                    }
+                }
+            }
+        }
+        Ok(result)
+    }
+}
+
 #[async_trait]
 impl BlockPolling for ChainClient {
     async fn stream_finalized_blocks(&mut self) -> Result<()> {
@@ -38,9 +122,7 @@ impl BlockPolling for ChainClient {
 
     async fn get_historic_blocks(&self, from: u64, to: u64) -> Result<()> {
         let concurrent_requests = futures::stream::iter(
-            (from..to)
-                .into_iter()
-                .map(|block_number| self.client.get_block(block_number)),
+            (from..to).map(|block_number| self.client.get_block(block_number)),
         )
         .buffer_unordered(3)
         .map(|r| {
@@ -54,38 +136,56 @@ impl BlockPolling for ChainClient {
         Ok(())
     }
 
-    async fn get_events<D>(
-        &self,
-        event: Filter,
-        from_block: BlockNumber,
-        to_block: BlockNumber,
-    ) -> Result<Vec<D>>
+    async fn get_events<D>(&self, event: Filter, from_block: u64, to_block: u64) -> Result<Vec<D>>
     where
         D: EthEvent,
     {
-        let event = event.from_block(from_block).to_block(to_block);
-
-        let logs: Vec<serde_json::Value> = self
-            .client
-            .provider()
-            .request("eth_getLogs", [event])
-            .await?;
+        let event = event
+            .from_block(from_block)
+            .to_block(to_block)
+            .address(self.chain_gateway_address);
 
-        let logs = logs
-            .into_iter()
-            .map(|log| {
-                // Parse log values
-                let mut log = log;
-                match log["removed"].as_str() {
-                    Some("true") => log["removed"] = serde_json::Value::Bool(true),
-                    Some("false") => log["removed"] = serde_json::Value::Bool(false),
-                    Some(&_) => warn!("invalid parsing"),
-                    None => (),
-                };
-                let log: Log = serde_json::from_value(log)?;
-                Ok(log)
-            })
-            .collect::<Result<Vec<Log>>>()?;
+        let logs: Vec<Log> = match self.log_strategy {
+            LogStrategy::GetLogs => {
+                let logs: Vec<serde_json::Value> = self
+                    .client
+                    .provider()
+                    .request("eth_getLogs", [event])
+                    .await?;
+                logs.into_iter()
+                    .filter(|log| {
+                        log.get("address")
+                            .and_then(|val| val.as_str())
+                            .and_then(|val| val.parse::<Address>().ok())
+                            .map(|from_address| {
+                                if from_address == self.chain_gateway_address {
+                                    true
+                                } else {
+                                    info!(
+                                        "event from {0:#x} , chain gateway {1:#x}",
+                                        from_address, self.chain_gateway_address
+                                    );
+                                    false
+                                }
+                            })
+                            .unwrap_or(false)
+                    })
+                    .map(|log| {
+                        // Parse log values
+                        let mut log = log;
+                        match log["removed"].as_str() {
+                            Some("true") => log["removed"] = serde_json::Value::Bool(true),
+                            Some("false") => log["removed"] = serde_json::Value::Bool(false),
+                            Some(&_) => warn!("invalid parsing"),
+                            None => (),
+                        };
+                        let log: Log = serde_json::from_value(log)?;
+                        Ok(log)
+                    })
+                    .collect::<Result<Vec<Log>>>()?
+            }
+            LogStrategy::GetTransactions => self.get_logs_from_blocks(event).await?,
+        };
 
         let events: Vec<D> = logs
             .into_iter()
@@ -131,41 +231,54 @@ impl<D: EthEvent> EventListener<D> {
     where
         D: EthEvent,
     {
+        // Some chains (Zilliqa!) can't get it together to broadcast events at the block they are
+        // currently at, so there is an option to deliberately delay checking back a few blocks,
+        // until the node we are pointed at has the logs for the block and can therefore reply
+        // correctly.
+        let scan_behind_blocks = self.chain_client.scan_behind_blocks;
         let new_block: U64 = match self.get_block_number().await {
             Err(e) => {
                 warn!(?e);
                 let vec = Ok(vec![]);
                 return vec;
             }
-            // Return early if smaller block
-            Ok(block) if block <= self.current_block => return Ok(vec![]),
             Ok(block) => block,
         };
 
+        // Don't worry about blocks we've already scanned.
+        let min_block = self.current_block + 1;
+        // Don't worry about blocks which are too recent for us to care about.
+        let max_block = new_block - scan_behind_blocks;
+        if max_block <= min_block {
+            // No point in checking, return early
+            return Ok(vec![]);
+        }
         // `eth_getLogs`'s block_number is inclusive, so `current_block` is already retrieved
         let events = match self
             .chain_client
-            .get_events(
-                self.event.clone(),
-                (self.current_block + 1).into(),
-                new_block.into(),
-            )
+            .get_events(self.event.clone(), min_block.as_u64(), max_block.as_u64())
             .await
         {
             Err(err) => {
+                warn!(
+                    "Failed to fetch events on {} from {} to {}",
+                    self.chain_client,
+                    (self.current_block + 1),
+                    new_block
+                );
                 warn!(?err);
                 vec![]
             }
             Ok(events) => events,
         };
-        debug!(
+        info!(
             "{} Getting from {} to {}, events gathered {:?}",
             self.chain_client.chain_id,
             (self.current_block + 1),
             new_block,
             events.len(),
         );
-        if events.len() > 0 {
+        if !events.is_empty() {
             info!(
                 "Getting from {} to {}, events gathered {:?}",
                 (self.current_block + 1),
@@ -183,7 +296,9 @@ impl<D: EthEvent> EventListener<D> {
         let stream = try_stream! {
             // TODO: update block interval on config
             let mut interval = interval(Duration::from_secs(3));
-            self.current_block = self.chain_client.client.get_block_number().await?;
+            // Set this down 1 because we (almost) certainly haven't scanned this block
+            // yet...
+            self.current_block = self.chain_client.client.get_block_number().await? - 1;
 
             loop {
                 interval.tick().await;
diff --git a/bridge-validators/src/bridge_node.rs b/bridge-validators/src/bridge_node.rs
index a9a0041..24233d7 100644
--- a/bridge-validators/src/bridge_node.rs
+++ b/bridge-validators/src/bridge_node.rs
@@ -69,7 +69,7 @@ impl BridgeNode {
     async fn get_historic_events<D>(
         &self,
         event: Event<Arc<Client>, Client, D>,
-        to_block: BlockNumber,
+        to_block: u64,
     ) -> Result<Vec<D>>
     where
         D: EthEvent,
@@ -91,7 +91,10 @@ impl BridgeNode {
         } else {
             BlockNumber::Finalized
         };
-        info!("Getting Historic Events {}", to_block);
+        info!(
+            "Getting Historic Events for chainId#{}: {}",
+            self.chain_client.chain_id, to_block
+        );
 
         let to_block_number = self
             .chain_client
@@ -109,10 +112,10 @@ impl BridgeNode {
         let dispatch_events = self
             .get_historic_events(
                 chain_gateway.event::<DispatchedFilter>(),
-                BlockNumber::Number(to_block_number.into()),
+                to_block_number.as_u64(),
             )
             .await?;
-        dbg!(dispatch_events.len());
+        info!("  .. dispatch_events: {}", dispatch_events.len());
 
         for dispatch in dispatch_events {
             self.handle_dispatch_event(dispatch)?;
@@ -121,21 +124,21 @@ impl BridgeNode {
         let relay_events = self
             .get_historic_events(
                 chain_gateway.event::<RelayedFilter>(),
-                BlockNumber::Number(to_block_number.into()),
+                to_block_number.as_u64(),
             )
             .await?;
 
-        dbg!(relay_events.len());
+        info!("  .. relay_events: {}", relay_events.len());
 
         for relay in relay_events {
             self.handle_relay_event(relay)?;
         }
 
-        unimplemented!();
+        Ok(())
     }
 
     pub async fn listen_events(&mut self) -> Result<()> {
-        println!("Start Listening: {:?}", self.chain_client.chain_id);
+        info!("Start Listening: {:?}", self.chain_client.chain_id);
 
         let chain_gateway: ChainGateway<Client> = self.chain_client.get_contract();
 
@@ -218,11 +221,6 @@ impl BridgeNode {
             return Ok(());
         }
 
-        info!(
-            "Chain: {} event found to be broadcasted: {}",
-            self.chain_client.chain_id, event
-        );
-
         if let Some(RelayEventSignatures {
             dispatched: true, ..
         }) = self.event_signatures.get(&event.nonce)
@@ -286,7 +284,7 @@ impl BridgeNode {
         let Relay { signature, event } = echo;
         let nonce = event.nonce;
         let event_hash = event.hash();
-
+        info!("handling relay {:?}", echo);
         let signature = Signature::try_from(signature.to_vec().as_slice())?;
 
         // update validator set in case it has changed
@@ -337,9 +335,11 @@ impl BridgeNode {
         };
 
         info!(
-            "Handling received: {:?}, collected: {:?}",
+            "Handling received: {:?}, collected: {:?}, is_leader {:?}, has_supermajority {:?}",
             &echo,
-            event_signatures.signatures.len()
+            event_signatures.signatures.len(),
+            self.is_leader,
+            self.has_supermajority(event_signatures.signatures.len())
         );
 
         // if leader and majority, create request to dispatch
diff --git a/bridge-validators/src/client.rs b/bridge-validators/src/client.rs
index 69d8976..65009b5 100644
--- a/bridge-validators/src/client.rs
+++ b/bridge-validators/src/client.rs
@@ -8,11 +8,21 @@ use ethers::{
     signers::{LocalWallet, Signer},
     types::{Address, U256},
 };
+use std::fmt;
+use tracing::info;
 
 use crate::ChainConfig;
 
 pub type Client = NonceManagerMiddleware<SignerMiddleware<Provider<Http>, LocalWallet>>;
 
+#[derive(Debug, Clone)]
+pub enum LogStrategy {
+    // use eth_getLogs()
+    GetLogs,
+    // scan every transaction individually
+    GetTransactions,
+}
+
 #[derive(Debug, Clone)]
 pub struct ChainClient {
     pub client: Arc<Client>,
@@ -22,25 +32,43 @@ pub struct ChainClient {
     pub wallet: LocalWallet,
     pub chain_gateway_block_deployed: u64,
     pub block_instant_finality: bool,
-    pub legacy_gas_estimation: bool,
+    pub legacy_gas_estimation_percent: Option<u64>,
+    pub scan_behind_blocks: u64,
+    pub log_strategy: LogStrategy,
+}
+
+impl fmt::Display for ChainClient {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "chainid#{}", self.chain_id)
+    }
 }
 
 impl ChainClient {
     pub async fn new(config: &ChainConfig, wallet: LocalWallet) -> Result<Self> {
+        info!(
+            "initialising chain client for URL {0} with gateway {1:#x} ... ",
+            config.rpc_url.as_str(),
+            config.chain_gateway_address
+        );
         let provider = Provider::<Http>::try_from(config.rpc_url.as_str())?;
         // let provider = Provider::<Ws>::connect(&config.rpc_url).await?;
         let chain_id = provider.get_chainid().await?;
-
         let client: Arc<Client> = Arc::new(
             provider
                 .with_signer(wallet.clone().with_chain_id(chain_id.as_u64()))
                 .nonce_manager(wallet.address()),
         );
-
         // TODO: get the validator_manager_address from chain_gateway itself
         let chain_gateway = ChainGateway::new(config.chain_gateway_address, client.clone());
         let validator_manager_address: Address = chain_gateway.validator_manager().call().await?;
-
+        let strategy = match config.use_get_transactions {
+            None => LogStrategy::GetLogs,
+            Some(v) => match v {
+                false => LogStrategy::GetLogs,
+                true => LogStrategy::GetTransactions,
+            },
+        };
+        info!("... success!");
         Ok(ChainClient {
             client,
             validator_manager_address,
@@ -49,7 +77,9 @@ impl ChainClient {
             wallet,
             chain_gateway_block_deployed: config.chain_gateway_block_deployed,
             block_instant_finality: config.block_instant_finality.unwrap_or_default(),
-            legacy_gas_estimation: config.legacy_gas_estimation.unwrap_or_default(),
+            legacy_gas_estimation_percent: config.legacy_gas_estimation_percent,
+            scan_behind_blocks: config.scan_behind_blocks.unwrap_or_default(),
+            log_strategy: strategy,
         })
     }
 }
diff --git a/bridge-validators/src/main.rs b/bridge-validators/src/main.rs
index 7df8db4..de381c8 100644
--- a/bridge-validators/src/main.rs
+++ b/bridge-validators/src/main.rs
@@ -31,7 +31,9 @@ pub struct ChainConfig {
     pub chain_gateway_address: Address,
     pub chain_gateway_block_deployed: u64,
     pub block_instant_finality: Option<bool>,
-    pub legacy_gas_estimation: Option<bool>,
+    pub legacy_gas_estimation_percent: Option<u64>,
+    pub scan_behind_blocks: Option<u64>,
+    pub use_get_transactions: Option<bool>,
 }
 
 #[derive(Debug, Clone, Deserialize)]
@@ -49,6 +51,8 @@ struct Args {
     config_file: PathBuf,
     #[clap(long)]
     is_leader: bool,
+    #[clap(long)]
+    dispatch_history: bool,
 }
 
 #[tokio::main]
@@ -77,8 +81,7 @@ async fn main() -> Result<()> {
         bootstrap_address: config.bootstrap_address,
     };
 
-    let mut node = P2pNode::new(args.secret_key, config).await?;
-
+    let mut node = P2pNode::new(args.secret_key, config, args.dispatch_history).await?;
     node.start().await?;
 
     Ok(())
diff --git a/bridge-validators/src/message.rs b/bridge-validators/src/message.rs
index 5ec74f3..a51c8d7 100644
--- a/bridge-validators/src/message.rs
+++ b/bridge-validators/src/message.rs
@@ -17,6 +17,7 @@ pub enum ExternalMessage {
 }
 
 impl ExternalMessage {
+    #[allow(dead_code)]
     pub fn name(&self) -> &'static str {
         match self {
             ExternalMessage::BridgeEcho(_) => "BridgeEcho",
diff --git a/bridge-validators/src/p2p_node.rs b/bridge-validators/src/p2p_node.rs
index 0eff790..63cd31e 100644
--- a/bridge-validators/src/p2p_node.rs
+++ b/bridge-validators/src/p2p_node.rs
@@ -1,18 +1,15 @@
 // ! taken from ZQ2
 //! A node in the Zilliqa P2P network. May coordinate multiple shard nodes.
 
-use anyhow::{anyhow, Result};
+use anyhow::Result;
 use libp2p::{
-    core::upgrade,
     futures::StreamExt,
-    gossipsub::{self, IdentTopic, MessageAuthenticity},
+    gossipsub::{self},
     identify,
     kad::{self, store::MemoryStore},
     mdns,
-    multiaddr::Multiaddr,
-    noise,
-    swarm::{self, NetworkBehaviour, SwarmEvent},
-    tcp, yamux, PeerId, Swarm, Transport,
+    swarm::NetworkBehaviour,
+    PeerId,
 };
 use tokio::{
     select,
@@ -20,7 +17,7 @@ use tokio::{
     task::JoinHandle,
 };
 use tokio_stream::wrappers::UnboundedReceiverStream;
-use tracing::{debug, error, info};
+use tracing::{error, info};
 
 use crate::{
     crypto::SecretKey,
@@ -29,6 +26,7 @@ use crate::{
 };
 
 #[derive(NetworkBehaviour)]
+#[allow(unused)]
 struct Behaviour {
     gossipsub: gossipsub::Behaviour,
     mdns: mdns::tokio::Behaviour,
@@ -42,6 +40,7 @@ pub struct P2pNode {
     /// Forward messages to the bridge validators. Only initialised once BridgeNode is created
     bridge_inbound_message_sender: UnboundedSender<ExternalMessage>,
     /// Bridge nodes get a copy of these senders to propagate messages across the network.
+    #[allow(dead_code)]
     bridge_outbound_message_sender: UnboundedSender<ExternalMessage>,
     /// The p2p node keeps a handle to these receivers, to obtain messages from bridge nodes and propagate
     /// them as necessary.
@@ -50,7 +49,11 @@ pub struct P2pNode {
 }
 
 impl P2pNode {
-    pub async fn new(secret_key: SecretKey, config: ValidatorNodeConfig) -> Result<Self> {
+    pub async fn new(
+        secret_key: SecretKey,
+        config: ValidatorNodeConfig,
+        dispatch_history: bool,
+    ) -> Result<Self> {
         let (bridge_outbound_message_sender, bridge_outbound_message_receiver) =
             mpsc::unbounded_channel();
         let bridge_outbound_message_receiver =
@@ -93,10 +96,14 @@ impl P2pNode {
         // let topic = IdentTopic::new("bridge"); // TODO: change to more specific bridge chains
 
         // self.swarm.behaviour_mut().gossipsub.subscribe(&topic)?;
-
         // Initialise bridge node
-        let mut validator_node =
-            ValidatorNode::new(config, bridge_outbound_message_sender.clone()).await?;
+
+        let mut validator_node = ValidatorNode::new(
+            config,
+            bridge_outbound_message_sender.clone(),
+            dispatch_history,
+        )
+        .await?;
 
         let bridge_inbound_message_sender = validator_node.get_bridge_inbound_message_sender();
 
@@ -137,8 +144,6 @@ impl P2pNode {
 
         // self.swarm.listen_on(addr)?;
 
-        println!("Started");
-
         loop {
             select! {
                 // event = self.swarm.select_next_some() => match event {
@@ -186,8 +191,8 @@ impl P2pNode {
                 // },
                 message = self.bridge_outbound_message_receiver.next() => {
                     let message = message.expect("message stream should be infinite");
-                    let message_type = message.name();
-                    let data = serde_json::to_vec(&message).unwrap();
+                    // let message_type = message.name();
+                    // let data = serde_json::to_vec(&message).unwrap();
                     let from = self.peer_id;
 
                     // let topic = IdentTopic::new("bridge");
@@ -214,10 +219,12 @@ impl P2pNode {
                         Ok(Ok(())) => unreachable!(),
                         Ok(Err(e)) => {
                             error!(%e);
+                            #[allow(clippy::useless_conversion)]
                             return Err(e.into())
                         }
                         Err(e) =>{
                             error!(%e);
+                            #[allow(clippy::useless_conversion)]
                             return Err(e.into())
                         }
                     }
diff --git a/bridge-validators/src/validator_node.rs b/bridge-validators/src/validator_node.rs
index 6da4f0b..9e382db 100644
--- a/bridge-validators/src/validator_node.rs
+++ b/bridge-validators/src/validator_node.rs
@@ -27,6 +27,7 @@ pub struct ValidatorNodeConfig {
     pub chain_configs: Vec<ChainConfig>,
     pub private_key: SecretKey,
     pub is_leader: bool,
+    #[allow(dead_code)]
     pub bootstrap_address: Option<(PeerId, Multiaddr)>,
 }
 
@@ -47,18 +48,16 @@ impl ValidatorNode {
     pub async fn new(
         config: ValidatorNodeConfig,
         bridge_outbound_message_sender: UnboundedSender<ExternalMessage>,
+        dispatch_history: bool,
     ) -> Result<Self> {
         let mut chain_node_senders = HashMap::new();
         let mut chain_clients = HashMap::new();
         let wallet = config.private_key.as_wallet()?;
 
         println!("Node address is: {:?}", wallet.address());
-
         let (bridge_message_sender, bridge_message_receiver) = mpsc::unbounded_channel();
         let bridge_message_receiver = UnboundedReceiverStream::new(bridge_message_receiver);
-
         let mut bridge_node_threads: JoinSet<Result<()>> = JoinSet::new();
-
         for chain_config in config.chain_configs {
             let chain_client = ChainClient::new(&chain_config, wallet.clone()).await?;
 
@@ -72,12 +71,12 @@ impl ValidatorNode {
                 validator_chain_node.chain_client.chain_id,
                 validator_chain_node.get_inbound_message_sender(),
             );
-
             chain_clients.insert(validator_chain_node.chain_client.chain_id, chain_client);
-
             bridge_node_threads.spawn(async move {
                 // Fill all historic events first
-                // validator_chain_node.sync_historic_events().await
+                if dispatch_history {
+                    validator_chain_node.sync_historic_events().await?;
+                }
                 // Then start listening to new ones
                 validator_chain_node.listen_events().await
             });
@@ -140,10 +139,12 @@ impl ValidatorNode {
                         Ok(Ok(())) => unreachable!(),
                         Ok(Err(e)) => {
                             error!(%e);
+                            #[allow(clippy::useless_conversion)]
                             return Err(e.into())
                         }
                         Err(e) =>{
                             error!(%e);
+                            #[allow(clippy::useless_conversion)]
                             return Err(e.into())
                         }
                     }
@@ -180,7 +181,7 @@ impl ValidatorNode {
             event.target_chain_id, event.nonce
         );
 
-        let function_call = if client.legacy_gas_estimation {
+        let function_call = if client.legacy_gas_estimation_percent.is_some() {
             function_call.legacy()
         } else {
             function_call
@@ -191,7 +192,7 @@ impl ValidatorNode {
 
             // Get gas estimate
             // TODO: refactor configs specifically for zilliqa
-            let _function_call = if client.legacy_gas_estimation {
+            let _function_call = if let Some(percent) = client.legacy_gas_estimation_percent {
                 let gas_estimate = match function_call.estimate_gas().await {
                     Ok(estimate) => estimate,
                     Err(err) => {
@@ -199,8 +200,8 @@ impl ValidatorNode {
                         return Ok(());
                     }
                 };
-                info!("Gas estimate {:?}", gas_estimate);
-                function_call.clone().gas(gas_estimate * 130 / 100) // Apply multiplier
+                info!("Legacy gas estimation: estimate {:?}", gas_estimate);
+                function_call.clone().gas(gas_estimate * percent / 100) // Apply multiplier
             } else {
                 let function_call = function_call.clone();
                 // `eth_call` does not seem to work on ZQ so it had to be skipped
@@ -231,7 +232,7 @@ impl ValidatorNode {
             // Make the actual call
             match _function_call.send().await {
                 Ok(tx) => {
-                    println!(
+                    info!(
                         "Transaction Sent {}.{} {:?}",
                         event.target_chain_id,
                         event.nonce,

From b6eb330faf949fb174f7741328822f64871b4de5 Mon Sep 17 00:00:00 2001
From: Richard Watts <richard@zilliqa.com>
Date: Fri, 30 Aug 2024 18:02:41 +0100
Subject: [PATCH 2/4] (feat) Zilbridge compatibility contracts. (feat)
 Documentation for zilbridge compatibility contracts. (feat) Scilla deployment
 scripts for zilbridge compatibility contracts.

---
 docs/test_1a000b82.md                         |   16 +
 docs/todo.md                                  |   14 +
 docs/zilbridge.md                             |  292 +
 docs/zilbridge_test_template.md               |   16 +
 scilla-contracts/.gitignore                   |   17 +
 scilla-contracts/README.md                    |   15 +
 .../contracts/FungibleToken.scilla            |  195 +
 .../contracts/ScillaConnector.sol             |  238 +
 .../contracts/SwitcheoTokenZRC2.scilla        |  373 +
 .../contracts/ZRC2ProxyForZRC2.sol            |  116 +
 scilla-contracts/hardhat.config.js            |   24 +
 scilla-contracts/hardhat.config.ts            |   25 +
 scilla-contracts/ignition/modules/Lock.js     |   14 +
 scilla-contracts/ignition/modules/Lock.ts     |   17 +
 scilla-contracts/package-lock.json            | 8113 +++++++++++++++++
 scilla-contracts/package.json                 |   19 +
 scilla-contracts/pnpm-lock.yaml               | 4449 +++++++++
 scilla-contracts/scripts/debug.ts             |   32 +
 scilla-contracts/scripts/deploy.ts            |   68 +
 scilla-contracts/scripts/transfer.ts          |   28 +
 scilla-contracts/tsconfig.json                |   11 +
 smart-contracts/README.md                     |    5 +
 .../LockProxyTokenManagerStorage.sol          |   38 +
 .../LockProxyTokenManagerUpgradeable.sol      |   54 +
 ...leaseOrNativeTokenManagerUpgradeableV3.sol |   82 +
 .../LockProxyTokenManagerUpgradeableV3.sol    |   77 +
 .../ZilBridge/ccmCrossChainManager.sol        | 1618 ++++
 .../ZilBridge/ccmExtendCrossChainManager.sol  |   72 +
 .../script/bsc-testnet/bridgeTokens.s.sol     |    9 +-
 .../script/bsc-testnet/deployBridge.s.sol     |    9 +-
 .../bsc-testnet/deployBridgeToken.s.sol       |   11 +-
 .../bsc-testnet/deployCoreUpgradeable.s.sol   |    9 +-
 .../bsc-testnet/deployMockZilBridge.s.sol     |   46 +
 .../deployXBridgeOverMockZilBridge.s.sol      |   39 +
 .../deployZilBridgeTokenManagers.s.sol        |   53 +
 .../bsc-testnet/deployZilBridgeTokens.s.sol   |   50 +
 .../script/bsc-testnet/pauseBridge.s.sol      |   22 +-
 .../setChainGatewayOnTokenManager.s.sol       |    7 +-
 .../bsc-testnet/setZilBridgeRouting.s.sol     |   58 +
 .../script/bsc-testnet/unpauseBridge.s.sol    |   33 +-
 .../bsc-testnet/upgradeTokenManagerV2.s.sol   |    5 +-
 .../bsc-testnet/upgradeTokenManagerV3.s.sol   |    5 +-
 .../bsc-testnet/zilBridgeTransferERC20.s.sol  |   24 +
 smart-contracts/script/config.ts              |    4 +
 smart-contracts/script/testnetConfig.s.sol    |   52 +
 .../script/zq-testnet/bridgeTokens.s.sol      |    9 +-
 .../zq-testnet/deployChainGateway.s.sol       |    7 +-
 .../zq-testnet/deployCoreUpgradeable.s.sol    |   11 +-
 .../deployNativeTokenManagerV3.s.sol          |   42 +
 .../zq-testnet/deployTokenManager.s.sol       |    8 +-
 .../script/zq-testnet/deployZRC2ERC20.s.sol   |   35 +
 .../script/zq-testnet/dispatchRelay.s.sol     |    6 +-
 .../script/zq-testnet/pauseBridge.s.sol       |   37 +-
 .../script/zq-testnet/registerToken.s.sol     |    5 +-
 .../setChainGatewayOnTokenManager.s.sol       |   21 +-
 .../zq-testnet/setZilBridgeRouting.s.sol      |   57 +
 .../script/zq-testnet/unpauseBridge.s.sol     |   34 +-
 .../zq-testnet/upgradeTokenManagerV2.s.sol    |    5 +-
 .../zq-testnet/upgradeTokenManagerV3.s.sol    |    5 +-
 .../script/zq-testnet/zilBridgeDebug.s.sol    |   39 +
 .../zq-testnet/zilBridgeTransferERC20.s.sol   |   22 +
 .../test/periphery/TokenBridge.native.t.sol   |  225 +
 ...AndReleaseOrNativeTokenManagerDeployer.sol |   36 +
 .../test/zilbridge/DeployZilBridge.t.sol      |  124 +
 .../test/zilbridge/MockLockProxy.sol          |  311 +
 .../test/zilbridge/TestingLockProxy.sol       | 1896 ++++
 .../LockProxyTokenManagerDeployer.sol         |   34 +
 .../ZilBridgeTokenBridge.compat.t.sol         |  224 +
 .../ZilBridgeTokenBridge.integration.t.sol    |  240 +
 .../ZilBridgeTokenIntegrationFixture.t.sol    |  152 +
 .../test/zilbridge/ZilBridgeTransfer.t.sol    |   19 +
 .../ccmExtendCrossChainManager.t.sol          |   79 +
 .../infrastructure/ccmCrossChainManager.sol   | 1618 ++++
 .../zilbridge/infrastructure/ccmProxy.sol     |  265 +
 .../infrastructure/ethCrossChainData.sol      |  316 +
 .../zilbridge/infrastructure/lockProxy.sol    | 1884 ++++
 .../zilbridge/tokens/switcheo/libs/LICENSE    |   22 +
 .../zilbridge/tokens/switcheo/libs/README.md  |    3 +
 .../tokens/switcheo/libs/math/SafeMath.sol    |  152 +
 .../switcheo/libs/token/ERC20/ERC20.sol       |  230 +
 .../libs/token/ERC20/ERC20Detailed.sol        |   54 +
 .../switcheo/libs/token/ERC20/IERC20.sol      |   77 +
 .../switcheo/tokens/SwitcheoTokenETH.sol      |   48 +
 .../tokens/zrc2erc20/ScillaConnector.sol      |  238 +
 .../tokens/zrc2erc20/ZRC2ProxyForZRC2.sol     |  116 +
 85 files changed, 25109 insertions(+), 71 deletions(-)
 create mode 100644 docs/test_1a000b82.md
 create mode 100644 docs/todo.md
 create mode 100644 docs/zilbridge.md
 create mode 100644 docs/zilbridge_test_template.md
 create mode 100644 scilla-contracts/.gitignore
 create mode 100644 scilla-contracts/README.md
 create mode 100644 scilla-contracts/contracts/FungibleToken.scilla
 create mode 100644 scilla-contracts/contracts/ScillaConnector.sol
 create mode 100644 scilla-contracts/contracts/SwitcheoTokenZRC2.scilla
 create mode 100644 scilla-contracts/contracts/ZRC2ProxyForZRC2.sol
 create mode 100644 scilla-contracts/hardhat.config.js
 create mode 100644 scilla-contracts/hardhat.config.ts
 create mode 100644 scilla-contracts/ignition/modules/Lock.js
 create mode 100644 scilla-contracts/ignition/modules/Lock.ts
 create mode 100644 scilla-contracts/package-lock.json
 create mode 100644 scilla-contracts/package.json
 create mode 100644 scilla-contracts/pnpm-lock.yaml
 create mode 100644 scilla-contracts/scripts/debug.ts
 create mode 100644 scilla-contracts/scripts/deploy.ts
 create mode 100644 scilla-contracts/scripts/transfer.ts
 create mode 100644 scilla-contracts/tsconfig.json
 create mode 100644 smart-contracts/contracts/periphery/LockProxyTokenManagerStorage.sol
 create mode 100644 smart-contracts/contracts/periphery/LockProxyTokenManagerUpgradeable.sol
 create mode 100644 smart-contracts/contracts/periphery/TokenManagerV3/LockAndReleaseOrNativeTokenManagerUpgradeableV3.sol
 create mode 100644 smart-contracts/contracts/periphery/TokenManagerV3/LockProxyTokenManagerUpgradeableV3.sol
 create mode 100644 smart-contracts/contracts/periphery/ZilBridge/ccmCrossChainManager.sol
 create mode 100644 smart-contracts/contracts/periphery/ZilBridge/ccmExtendCrossChainManager.sol
 create mode 100644 smart-contracts/script/bsc-testnet/deployMockZilBridge.s.sol
 create mode 100644 smart-contracts/script/bsc-testnet/deployXBridgeOverMockZilBridge.s.sol
 create mode 100644 smart-contracts/script/bsc-testnet/deployZilBridgeTokenManagers.s.sol
 create mode 100644 smart-contracts/script/bsc-testnet/deployZilBridgeTokens.s.sol
 create mode 100644 smart-contracts/script/bsc-testnet/setZilBridgeRouting.s.sol
 create mode 100644 smart-contracts/script/bsc-testnet/zilBridgeTransferERC20.s.sol
 create mode 100644 smart-contracts/script/testnetConfig.s.sol
 create mode 100644 smart-contracts/script/zq-testnet/deployNativeTokenManagerV3.s.sol
 create mode 100644 smart-contracts/script/zq-testnet/deployZRC2ERC20.s.sol
 create mode 100644 smart-contracts/script/zq-testnet/setZilBridgeRouting.s.sol
 create mode 100644 smart-contracts/script/zq-testnet/zilBridgeDebug.s.sol
 create mode 100644 smart-contracts/script/zq-testnet/zilBridgeTransferERC20.s.sol
 create mode 100644 smart-contracts/test/periphery/TokenBridge.native.t.sol
 create mode 100644 smart-contracts/test/periphery/TokenManagerDeployers/LockAndReleaseOrNativeTokenManagerDeployer.sol
 create mode 100644 smart-contracts/test/zilbridge/DeployZilBridge.t.sol
 create mode 100644 smart-contracts/test/zilbridge/MockLockProxy.sol
 create mode 100644 smart-contracts/test/zilbridge/TestingLockProxy.sol
 create mode 100644 smart-contracts/test/zilbridge/TokenManagerDeployers/LockProxyTokenManagerDeployer.sol
 create mode 100644 smart-contracts/test/zilbridge/ZilBridgeTokenBridge.compat.t.sol
 create mode 100644 smart-contracts/test/zilbridge/ZilBridgeTokenBridge.integration.t.sol
 create mode 100644 smart-contracts/test/zilbridge/ZilBridgeTokenIntegrationFixture.t.sol
 create mode 100644 smart-contracts/test/zilbridge/ZilBridgeTransfer.t.sol
 create mode 100644 smart-contracts/test/zilbridge/ccmExtendCrossChainManager.t.sol
 create mode 100644 smart-contracts/test/zilbridge/infrastructure/ccmCrossChainManager.sol
 create mode 100644 smart-contracts/test/zilbridge/infrastructure/ccmProxy.sol
 create mode 100644 smart-contracts/test/zilbridge/infrastructure/ethCrossChainData.sol
 create mode 100644 smart-contracts/test/zilbridge/infrastructure/lockProxy.sol
 create mode 100644 smart-contracts/test/zilbridge/tokens/switcheo/libs/LICENSE
 create mode 100644 smart-contracts/test/zilbridge/tokens/switcheo/libs/README.md
 create mode 100644 smart-contracts/test/zilbridge/tokens/switcheo/libs/math/SafeMath.sol
 create mode 100644 smart-contracts/test/zilbridge/tokens/switcheo/libs/token/ERC20/ERC20.sol
 create mode 100644 smart-contracts/test/zilbridge/tokens/switcheo/libs/token/ERC20/ERC20Detailed.sol
 create mode 100644 smart-contracts/test/zilbridge/tokens/switcheo/libs/token/ERC20/IERC20.sol
 create mode 100644 smart-contracts/test/zilbridge/tokens/switcheo/tokens/SwitcheoTokenETH.sol
 create mode 100644 smart-contracts/test/zilbridge/tokens/zrc2erc20/ScillaConnector.sol
 create mode 100644 smart-contracts/test/zilbridge/tokens/zrc2erc20/ZRC2ProxyForZRC2.sol

diff --git a/docs/test_1a000b82.md b/docs/test_1a000b82.md
new file mode 100644
index 0000000..1fb4651
--- /dev/null
+++ b/docs/test_1a000b82.md
@@ -0,0 +1,16 @@
+# Test run for 1a000b82
+
+Test cases:
+
+| Number | Token | From | To  | Result | Remarks |
+| ------ | ----- | ---- | --- | ------ | ------- |
+| IT001  | xTST  | BSC  | ZQ  | Pass   |         |
+| IT002  | xTST  | ZQ   | BSC | Pass   |         |
+| IT003  | ZBTST | ZQ   | BSC | Pass   |         |
+| IT004  | ZBTST | BSC  | ZQ  | Pass   |         |
+| IT005  | zBNB  | BSC  | ZQ  | Pass   |         |
+| IT006  | zBNB  | ZQ   | BSC | Pass   |         |
+| IT007  | eZIL  | ZQ   | BSC | Pass   |         |
+| IT008  | eZIL  | BSC  | ZQ  | Pass   |         |
+
+Result is Pass/Fail/Other.
diff --git a/docs/todo.md b/docs/todo.md
new file mode 100644
index 0000000..994b00b
--- /dev/null
+++ b/docs/todo.md
@@ -0,0 +1,14 @@
+# TODOs
+
+1. Refactor SafeMath out of all the zilbridge takeover contracts; less
+   conformant, but it's the default in 0.8.x and above.
+
+2. The validator should check whether the transaction it proxied ran
+   out of gas (meter the gas used by the subtransaction and if the
+   subtxn failed and it has < 15/16, say, gas left, it probably ran
+   out - try again with more gas).
+
+3. We don't cope well when (as quite often happens) a chain (usually BSC)
+   simply never confirms receipt of a transaction and we need to send it
+   again (or just assume it succeeded, because although it has run, the
+   chain isn't prepared to tell us this).
diff --git a/docs/zilbridge.md b/docs/zilbridge.md
new file mode 100644
index 0000000..a33f265
--- /dev/null
+++ b/docs/zilbridge.md
@@ -0,0 +1,292 @@
+# Zilbridge/XBridge integration
+
+Note that this work was done referencing the ZilBridge 1 contracts
+available on Ethereum Mainnet (which have been verified - hence the
+rather horrid source).
+
+Other contracts on the other correspondent chains of ZilBridge are
+only patchily verified, and the ones that are verified are different
+from those on Ethereum; the same approach should work, but I can't
+guarantee it. Proceed with caution.
+
+## CrossChainManager extensions
+
+The currently deployed CCM on Ethereum does not contain functions to
+register lockProxy extensions.
+
+These can be run remotely from the `counterpartChainId` (in
+`lockProxy`), currently set to 5 (which is presumably Carbon).
+
+This means we need to either proxy or replace it.
+
+Replacing it is undesirable, because the address of the CCM is baked
+into the configuration files for the relayers.
+
+My first attempt was to proxy it with a `CCMExtendProxy`, but this
+doesn't work, because:
+
+- To upgrade you have to call `ccmProxy::upgradeEthCrossChainManager()`
+- (side-note: this calls the _current_ `eccm.upgradeToNew()` which
+  hands ownership of the CCM data (proxied by the CCM contract) to
+  the CCMExtendProxty, which now needs to hand it back to the old
+  `ccm`)
+- Subsequent calls through the `CCMExtendProxy` need to use the
+  original `ccm` state, and therefore have the `CCMExtendProxy` as
+  `msg.sender`.
+- But there is no way to make the `CCMExtendProxy` an owner of the
+  `ccm`.
+
+The second attempt is to write a new CCM contract which duplicates the
+original CCM and contains the new functions. Sadly, this means that
+someone needs to remember what the whitelist parameters were, because
+it is a map that does not emit events and we thus can't work out what
+is in it.
+
+If we have the ability to register extensions directly over the
+bridge, then all the faff with `CCMExtendProxy` is unnecessary and we
+can directly register `LockProxyTokenManager` as an extension.
+
+If we do have to use `CCMExtendProxy`, it might be wise to remove the
+bridge functions for release, to exclude any bugs in them from our
+security perimeter.
+
+We'll have to discuss this when we come to migrate ZilBridge.
+
+## LockProxyTokenManager
+
+There is a `LockProxyTokenManager` which is registered as an extension
+and interacts with the lock proxy to bridge tokens.
+
+zilBridge itself doesn't know which tokens are mint/burn and which are
+lock/release - the lockproxy simply transfers tokens to and from
+itself and the contracts it talks to either mint and burn, or don't,
+when they spot that it's the lock proxy asking.
+
+We test it against a stubbed out LockProxyTokenManager which apes what the
+Scilla side will do eventually, but with stubbed interop calls.
+
+## Current outstanding issues
+
+### Parallel ZilBridge operations
+
+If we can't get someone (Polynet?) to install our extension remotely,
+we will have to replace the non-Zilliqa `ccm` and this will break
+ZilBridge. Polynet will have to reset their `ccm` address to recover
+functionality.
+
+If we do replace the non-Zilliqa `ccm`, I suggest that we do so with a
+CCM that doesn't accept cross-chain events; this will make sure that
+old keys from zilbridge/polynet can't compromise us in the future.
+
+## Testnet Deployment with Zilliqa Testnet and BSC testnet
+
+There are a group of scripts that allow you to deploy the EVM half of
+the ZilBridge transition code into BSC Testnet.
+
+The `smart-contracts/README.md` contains predeployed addresses; if you
+decide to redeploy you will need to change the constants in the `
+scripts, since this is how the addresses of previous contracts are
+baked in (sorry!).
+
+Set `PRIVATE_KEY_TESTNET` to the validator privkey, and
+`PRIVATE_KEY_ZILBRIDGE` to the zilbridge owner privkey.
+
+After each step (each script run) in the below, you will need to:
+
+- Verify the contracts you just deployed.
+- Update the `testnet_config.s.sol` file with the addresses of the
+  contracts you just deployed.
+
+In most cases, the script will give you the name of the
+`testnet_config.s.sol` constant to update.
+
+Run with:
+
+```sh
+forge script script/bsc-testnet/deployMockZilBridge.s.sol \
+   --rpc-url https://bsc-testnet.bnbchain.org --broadcast
+
+forge verify-contract <address> --rpc-url https://bsc-testnet.bnbchain.org \
+  --chain-id 97
+# Now fill in the data to test_config.s.sol
+forge script script/bsc-testnet/deployXBridgeOverMockZilBridge.s.sol \
+   --rpc-url https://bsc-testnet.bnbchain.org --broadcast
+forge verify-contract <address> --rpc-url https://bsc-testnet.bnbchain.org \
+  --chain-id 97
+# and again ..
+forge script scripts/bsc-testnet/deployZilBridgeTokenManagers.s.sol \
+  --rpc-url https://bsc-testnet.bnbchain.org --broadcast
+forge verify-contract <address> --rpc-url https://bsc-testnet.bnbchain.org \
+  --chain-id 97
+
+```
+
+Remember to verify all your contracts on BSC, or you will get
+hopelessly confused later.
+
+Now we need to deploy some contracts on the Zilliqa testnet. You can
+verify on Zilliqa via sourcify:
+
+```sh
+forge verify-contract <address> --rpc-url https://dev-api.zilliqa.com \
+  --chain-id 33101 --verifier sourcify
+```
+
+We'll need our own token manager. This is identical to the
+`LockAndReleaseTokenManager`, but contains some additional
+functionality to deal with bridging native tokens (so that bridged ZIL
+can be made to work).
+
+```sh
+forge script script/zq-testnet/deployNativeTokenManagerV3.s.sol \
+  --rpc-url https://dev-api.zilliqa.com --broadcast --legacy
+forge script script/zq-testnet/setChainGatewayOnTokenManager.s.sol \
+  --rpc-url https://dev-api.zilliqa.com --broadcast --legacy
+```
+
+Now we can deploy some contracts to the BNB testnet:
+
+```sh
+forge script script/bsc-testnet/deployZilBridgeTokens.s.sol \
+  --tc Deployment --rpc-url https://bsc-testnet.bnbchain.org \
+  --broadcast
+forge verify-contract <address> --rpc-url https://bsc-testnet.bnbchain.org \
+  --chain-id 97
+```
+
+And the corresponding tokens to the Zilliqa testnet:
+
+```sh
+cd scilla-contracts
+pnpm i
+export TOKEN_MANAGER_ADDRESS=(value of zq_lockAndReleaseOrNativeTokenManager)
+# NOW EDIT scripts/deploy.ts for the address of the Zilliqa testnet token manager.
+npx hardhat run scripts/deploy.ts --network zq_testnet
+```
+
+And now we ship an ERC20 proxy for our ZRC2 and switcheo tokens.
+
+```sh
+forge script script/zq-testnet/deployZRC2ERC20.s.sol \
+  --rpc-url https://dev-api.zilliqa.com --broadcast --legacy
+```
+
+And now we can set up routing for the tokens we just deployed. This is
+"just" calls, so
+
+```sh
+forge script script/bsc-testnet/setZilBridgeRouting.s.sol \
+  --rpc-url https://bsc-testnet.bnbchain.org --broadcast
+forge script script/zq-testnet/setZilBridgeRouting.s.sol \
+  --rpc-url https://dev-api.zilliqa.com --broadcast --legacy
+```
+
+### Testing
+
+The CI/CD'd testnet relayer will work for you.
+
+You can run the web interface with the instructions in [bridge-web/README.md](bridge-web/README.md).
+
+To avoid running into CORS problems, you will need to:
+
+```sh
+export VITE_BSC_TESTNET_API=http://localhost:6128
+export VITE_BSC_TESTNET_KEY=""
+```
+
+Remember to omit the trailing '/' from `VITE_BSC_TESTNET_API` or you
+will get CORS errors.
+
+And run:
+
+```sh
+mitmweb --mode reverse:https://data-seed-prebsc-1-s1.binance.org:8545/ \
+  --no-web-open-browser --listen-port 6128 --web-port 6001
+```
+
+Put the token and token manager addresses from `testnet_config.s.sol`
+into `bridge-web/src/config/config.ts` .
+
+You can transfer yourself some tokens by setting
+`ZILBRIDGE_TEST_ADDRESS` and `ZILBRIDGE_TEST_AMOUNT` and running:
+
+```sh
+forge script script/bsc-testnet/zilBridgeTransferERC20.s.sol \
+  --rpc-url https://bsc-testnet.bnbchain.org --broadcast
+```
+
+And, setting `ZILBRIDGE_SCILLA_TOKEN_ADDRESS` to the Scilla token address:
+
+```sh
+npx hardhat run scripts/transfer.ts
+```
+
+The ZQ transfer needs to be ZRC-2 because the initial funds holder is
+the Zilliqa account associated with `PRIVATE_KEY_ZILBRIDGE` and we
+therefore need a Scilla transition to transfer them.
+
+There is a test case template in
+`docs/zilbridge_test_template.md`. Copy it for your commit and fill it
+in.
+
+### Debugging from-zilliqa transfers
+
+Since Zilliqa testnet doesn't support tracing, this is done by
+bisection. You only need one way, since we only care about the sending
+txn working.
+
+- Redeploy the token manager on ZQ:
+
+```sh
+forge script script/zq-testnet/deployNativeTokenManagerV3.s.sol \
+  --rpc-url https://dev-api.zilliqa.com --broadcast --legacy
+<edit config>
+forge script script/zq-testnet/setChainGatewayOnTokenManager.s.sol \
+  --rpc-url https://dev-api.zilliqa.com --broadcast --legacy
+forge verify-contract <address> --rpc-url https://dev-api.zilliqa.com \
+ --chain-id 33101
+```
+
+Now write some routing - it actually doesn't matter that the routing
+gets messed up, because we're only testing Zilliqa ZRC2 out, and the
+native ZRC2 doesn't care what the token manager is:
+
+```sh
+forge script script/zq-testnet/setZilBridgeRouting.s.sol \
+  --rpc-url https://dev-api.zilliqa.com --broadcast --legacy
+```
+
+- Run `transfer.ts` to transfer some `ZBTEST` to the wallet you want to test.
+- List the new token manager in `config.ts` in `bridge-web`
+
+Now you can send a `transfer()` request and see if it works .. you'll
+need to redeploy the test token contracts and rerun routing setup
+(from both sides!) to fix the bridge when the bugs are sorted.
+
+When you're done, you'll need to redeploy the rest of the tokens, so
+that the bridged ZRC2 has the right token manager set, then set up
+routing again:
+
+```sh
+cd scilla-contracts
+pnpm i
+export TOKEN_MANAGER_ADDRESS=(value of
+  zq_lockAndReleaseOrNativeTokenManager WITHOUT 0x prefix)
+
+# NOW EDIT scripts/deploy.ts for the address of the
+# Zilliqa testnet token manager.
+npx hardhat run scripts/deploy.ts --network zq_testnet
+```
+
+Remember to update `testnet_config.sol`, then:
+
+```sh
+forge script script/zq-testnet/deployZRC2ERC20.s.sol \
+  --rpc-url https://dev-api.zilliqa.com --broadcast --legacy
+forge script script/bsc-testnet/setZilBridgeRouting.s.sol \
+  --rpc-url https://bsc-testnet.bnbchain.org --broadcast
+forge script script/zq-testnet/setZilBridgeRouting.s.sol \
+  --rpc-url https://dev-api.zilliqa.com --broadcast --legacy
+```
+
+And you can now get testing again.
diff --git a/docs/zilbridge_test_template.md b/docs/zilbridge_test_template.md
new file mode 100644
index 0000000..1338022
--- /dev/null
+++ b/docs/zilbridge_test_template.md
@@ -0,0 +1,16 @@
+# Test run for 3aa537f4e
+
+Test cases:
+
+| Number | Token | From | To  | Result | Remarks |
+| ------ | ----- | ---- | --- | ------ | ------- |
+| IT001  | xTST  | BSC  | ZQ  | Pass   |         |
+| IT002  | xTST  | ZQ   | BSC | Pass   |         |
+| IT003  | ZBTST | ZQ   | BSC |        |         |
+| IT004  | ZBTST | BSC  | ZQ  |        |         |
+| IT005  | zBNB  | BSC  | ZQ  |        |         |
+| IT006  | zBNB  | ZQ   | BSC |        |         |
+| IT007  | eZIL  | ZQ   | BSC |        |         |
+| IT008  | eZIL  | BSC  | ZQ  |        |         |
+
+Result is Pass/Fail/Other.
diff --git a/scilla-contracts/.gitignore b/scilla-contracts/.gitignore
new file mode 100644
index 0000000..e8c12ff
--- /dev/null
+++ b/scilla-contracts/.gitignore
@@ -0,0 +1,17 @@
+node_modules
+.env
+
+# Hardhat files
+/cache
+/artifacts
+
+# TypeChain files
+/typechain
+/typechain-types
+
+# solidity-coverage files
+/coverage
+/coverage.json
+
+# Hardhat Ignition default folder for deployments against a local node
+ignition/deployments/chain-31337
diff --git a/scilla-contracts/README.md b/scilla-contracts/README.md
new file mode 100644
index 0000000..f81610d
--- /dev/null
+++ b/scilla-contracts/README.md
@@ -0,0 +1,15 @@
+# Sample Hardhat Project
+
+This project demonstrates a basic Hardhat use case. It comes with a
+sample contract, a test for that contract, and a Hardhat Ignition
+module that deploys that contract.
+
+Try running some of the following tasks:
+
+```shell
+npx hardhat help
+npx hardhat test
+REPORT_GAS=true npx hardhat test
+npx hardhat node
+npx hardhat ignition deploy ./ignition/modules/Lock.ts
+```
diff --git a/scilla-contracts/contracts/FungibleToken.scilla b/scilla-contracts/contracts/FungibleToken.scilla
new file mode 100644
index 0000000..5ef0e14
--- /dev/null
+++ b/scilla-contracts/contracts/FungibleToken.scilla
@@ -0,0 +1,195 @@
+scilla_version 0
+
+(***************************************************)
+(*               Associated library                *)
+(***************************************************)
+import IntUtils
+library FungibleToken
+
+let one_msg = 
+  fun (msg : Message) => 
+  let nil_msg = Nil {Message} in
+  Cons {Message} msg nil_msg
+
+let two_msgs =
+fun (msg1 : Message) =>
+fun (msg2 : Message) =>
+  let msgs_tmp = one_msg msg2 in
+  Cons {Message} msg1 msgs_tmp
+
+(* Error events *)
+type Error =
+| CodeIsSender
+| CodeInsufficientFunds
+| CodeInsufficientAllowance
+
+let make_error =
+  fun (result : Error) =>
+    let result_code = 
+      match result with
+      | CodeIsSender              => Int32 -1
+      | CodeInsufficientFunds     => Int32 -2
+      | CodeInsufficientAllowance => Int32 -3
+      end
+    in
+    { _exception : "Error"; code : result_code }
+  
+let zero = Uint128 0
+
+(* Dummy user-defined ADT *)
+type Unit =
+| Unit
+
+let get_val =
+  fun (some_val: Option Uint128) =>
+  match some_val with
+  | Some val => val
+  | None => zero
+  end
+
+(***************************************************)
+(*             The contract definition             *)
+(***************************************************)
+
+contract FungibleToken
+(
+  contract_owner: ByStr20,
+  name : String,
+  symbol: String,
+  decimals: Uint32,
+  init_supply : Uint128
+)
+
+(* Mutable fields *)
+
+field total_supply : Uint128 = init_supply
+
+field balances: Map ByStr20 Uint128 
+  = let emp_map = Emp ByStr20 Uint128 in
+    builtin put emp_map contract_owner init_supply
+
+field allowances: Map ByStr20 (Map ByStr20 Uint128) 
+  = Emp ByStr20 (Map ByStr20 Uint128)
+
+(**************************************)
+(*             Procedures             *)
+(**************************************)
+
+procedure ThrowError(err : Error)
+  e = make_error err;
+  throw e
+end
+
+procedure IsNotSender(address: ByStr20)
+  is_sender = builtin eq _sender address;
+  match is_sender with
+  | True =>
+    err = CodeIsSender;
+    ThrowError err
+  | False =>
+  end
+end
+
+procedure AuthorizedMoveIfSufficientBalance(from: ByStr20, to: ByStr20, amount: Uint128)
+  o_from_bal <- balances[from];
+  bal = get_val o_from_bal;
+  can_do = uint128_le amount bal;
+  match can_do with
+  | True =>
+    (* Subtract amount from from and add it to to address *)
+    new_from_bal = builtin sub bal amount;
+    balances[from] := new_from_bal;
+    (* Adds amount to to address *)
+    get_to_bal <- balances[to];
+    new_to_bal = match get_to_bal with
+    | Some bal => builtin add bal amount
+    | None => amount
+    end;
+    balances[to] := new_to_bal
+  | False =>
+    (* Balance not sufficient *)
+    err = CodeInsufficientFunds;
+    ThrowError err
+  end
+end
+
+(***************************************)
+(*             Transitions             *)
+(***************************************)
+
+(* @dev: Increase the allowance of an approved_spender over the caller tokens. Only token_owner allowed to invoke.   *)
+(* param spender:      Address of the designated approved_spender.                                                   *)
+(* param amount:       Number of tokens to be increased as allowance for the approved_spender.                       *)
+transition IncreaseAllowance(spender: ByStr20, amount: Uint128)
+  IsNotSender spender;
+  some_current_allowance <- allowances[_sender][spender];
+  current_allowance = get_val some_current_allowance;
+  new_allowance = builtin add current_allowance amount;
+  allowances[_sender][spender] := new_allowance;
+  e = {_eventname : "IncreasedAllowance"; token_owner : _sender; spender: spender; new_allowance : new_allowance};
+  event e
+end
+
+(* @dev: Decrease the allowance of an approved_spender over the caller tokens. Only token_owner allowed to invoke. *)
+(* param spender:      Address of the designated approved_spender.                                                 *)
+(* param amount:       Number of tokens to be decreased as allowance for the approved_spender.                     *)
+transition DecreaseAllowance(spender: ByStr20, amount: Uint128)
+  IsNotSender spender;
+  some_current_allowance <- allowances[_sender][spender];
+  current_allowance = get_val some_current_allowance;
+  new_allowance =
+    let amount_le_allowance = uint128_le amount current_allowance in
+      match amount_le_allowance with
+      | True => builtin sub current_allowance amount
+      | False => zero
+      end;
+  allowances[_sender][spender] := new_allowance;
+  e = {_eventname : "DecreasedAllowance"; token_owner : _sender; spender: spender; new_allowance : new_allowance};
+  event e
+end
+
+(* @dev: Moves an amount tokens from _sender to the recipient. Used by token_owner. *)
+(* @dev: Balance of recipient will increase. Balance of _sender will decrease.      *)
+(* @param to:  Address of the recipient whose balance is increased.                 *)
+(* @param amount:     Amount of tokens to be sent.                                  *)
+transition Transfer(to: ByStr20, amount: Uint128)
+  AuthorizedMoveIfSufficientBalance _sender to amount;
+  e = {_eventname : "TransferSuccess"; sender : _sender; recipient : to; amount : amount};
+  event e;
+  (* Prevent sending to a contract address that does not support transfers of token *)
+  msg_to_recipient = {_tag : "RecipientAcceptTransfer"; _recipient : to; _amount : zero; 
+                      sender : _sender; recipient : to; amount : amount};
+  msg_to_sender = {_tag : "TransferSuccessCallBack"; _recipient : _sender; _amount : zero; 
+                  sender : _sender; recipient : to; amount : amount};
+  msgs = two_msgs msg_to_recipient msg_to_sender;
+  send msgs
+end
+
+(* @dev: Move a given amount of tokens from one address to another using the allowance mechanism. The caller must be an approved_spender. *)
+(* @dev: Balance of recipient will increase. Balance of token_owner will decrease.                                                        *)
+(* @param from:    Address of the token_owner whose balance is decreased.                                                                 *)
+(* @param to:      Address of the recipient whose balance is increased.                                                                   *)
+(* @param amount:  Amount of tokens to be transferred.                                                                                    *)
+transition TransferFrom(from: ByStr20, to: ByStr20, amount: Uint128)
+  o_spender_allowed <- allowances[from][_sender];
+  allowed = get_val o_spender_allowed;
+  can_do = uint128_le amount allowed;
+  match can_do with
+  | True =>
+    AuthorizedMoveIfSufficientBalance from to amount;
+    e = {_eventname : "TransferFromSuccess"; initiator : _sender; sender : from; recipient : to; amount : amount};
+    event e;
+    new_allowed = builtin sub allowed amount;
+    allowances[from][_sender] := new_allowed;
+    (* Prevent sending to a contract address that does not support transfers of token *)
+    msg_to_recipient = {_tag: "RecipientAcceptTransferFrom"; _recipient : to; _amount: zero; 
+                        initiator: _sender; sender : from; recipient: to; amount: amount};
+    msg_to_sender = {_tag: "TransferFromSuccessCallBack"; _recipient: _sender; _amount: zero; 
+                    initiator: _sender; sender: from; recipient: to; amount: amount};
+    msgs = two_msgs msg_to_recipient msg_to_sender;
+    send msgs
+  | False =>
+    err = CodeInsufficientAllowance;
+    ThrowError err
+  end
+end
diff --git a/scilla-contracts/contracts/ScillaConnector.sol b/scilla-contracts/contracts/ScillaConnector.sol
new file mode 100644
index 0000000..63f86ca
--- /dev/null
+++ b/scilla-contracts/contracts/ScillaConnector.sol
@@ -0,0 +1,238 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+pragma solidity ^0.8.20;
+
+library ScillaConnector {
+    uint private constant CALL_SCILLA_WITH_THE_SAME_SENDER = 1;
+    uint private constant SCILLA_CALL_PRECOMPILE_ADDRESS = 0x5a494c53;
+    uint private constant SCILLA_STATE_READ_PRECOMPILE_ADDRESS = 0x5a494c92;
+
+    /**
+     * @dev Calls a ZRC2 contract function with two arguments
+     * @param target The address of the ZRC2 contract
+     * @param tran_name The name of the function to call
+     * @param arg1 The first argument to the function
+     * @param arg2 The second argument to the function
+     */
+    function call(
+        address target,
+        string memory tran_name,
+        address arg1,
+        uint128 arg2
+    ) internal {
+        bytes memory encodedArgs = abi.encode(
+            target,
+            tran_name,
+            CALL_SCILLA_WITH_THE_SAME_SENDER,
+            arg1,
+            arg2
+        );
+        uint256 argsLength = encodedArgs.length;
+
+        assembly {
+            let alwaysSuccessForThisPrecompile := call(
+                21000,
+                SCILLA_CALL_PRECOMPILE_ADDRESS,
+                0,
+                add(encodedArgs, 0x20),
+                argsLength,
+                0x20,
+                0
+            )
+        }
+    }
+
+    /**
+     * @dev Calls a ZRC2 contract function with three arguments
+     * @param target The address of the ZRC2 contract
+     * @param tran_name The name of the function to call on the ZRC2 contract
+     * @param arg1 The first argument to the function
+     * @param arg2 The second argument to the function
+     * @param arg3 The third argument to the function
+     */
+    function call(
+        address target,
+        string memory tran_name,
+        address arg1,
+        address arg2,
+        uint128 arg3
+    ) internal {
+        bytes memory encodedArgs = abi.encode(
+            target,
+            tran_name,
+            CALL_SCILLA_WITH_THE_SAME_SENDER,
+            arg1,
+            arg2,
+            arg3
+        );
+        uint256 argsLength = encodedArgs.length;
+
+        assembly {
+            let alwaysSuccessForThisPrecompile := call(
+                21000,
+                SCILLA_CALL_PRECOMPILE_ADDRESS,
+                0,
+                add(encodedArgs, 0x20),
+                argsLength,
+                0x20,
+                0
+            )
+        }
+    }
+
+    /**
+     * @dev Reads a 128 bit integer from a ZRC2 contract
+     * @param target The address of the ZRC2 contract
+     * @param variable_name The name of the variable to read from the ZRC2 contract
+     * @return The value of the variable
+     */
+    function readUint128(
+        address target,
+        string memory variable_name
+    ) internal view returns (uint128) {
+        bytes memory encodedArgs = abi.encode(target, variable_name);
+        uint256 argsLength = encodedArgs.length;
+        bytes memory output = new bytes(36);
+
+        assembly {
+            let alwaysSuccessForThisPrecompile := staticcall(
+                21000,
+                SCILLA_STATE_READ_PRECOMPILE_ADDRESS,
+                add(encodedArgs, 0x20),
+                argsLength,
+                add(output, 0x20),
+                32
+            )
+        }
+
+        return abi.decode(output, (uint128));
+    }
+
+    /**
+     * @dev Reads a 32 bit integer from a ZRC2 contract
+     * @param target The address of the ZRC2 contract
+     * @param variable_name The name of the variable to read from the ZRC2 contract
+     * @return The value of the variable
+     */
+    function readUint32(
+        address target,
+        string memory variable_name
+    ) internal view returns (uint32) {
+        bytes memory encodedArgs = abi.encode(target, variable_name);
+        uint256 argsLength = encodedArgs.length;
+        bytes memory output = new bytes(36);
+
+        assembly {
+            let alwaysSuccessForThisPrecompile := staticcall(
+                21000,
+                SCILLA_STATE_READ_PRECOMPILE_ADDRESS,
+                add(encodedArgs, 0x20),
+                argsLength,
+                add(output, 0x20),
+                32
+            )
+        }
+
+        return abi.decode(output, (uint32));
+    }
+
+    /**
+     * @dev Reads a string from a ZRC2 contract
+     * @param target The address of the ZRC2 contract
+     * @param variable_name The name of the variable to read from the ZRC2 contract
+     * @return retVal The value of the variable
+     */
+    function readString(
+        address target,
+        string memory variable_name
+    ) internal view returns (string memory retVal) {
+        bytes memory encodedArgs = abi.encode(target, variable_name);
+        uint256 argsLength = encodedArgs.length;
+        bool success;
+        bytes memory output = new bytes(128);
+        uint256 output_len = output.length - 4;
+        assembly {
+            success := staticcall(
+                21000,
+                SCILLA_STATE_READ_PRECOMPILE_ADDRESS,
+                add(encodedArgs, 0x20),
+                argsLength,
+                add(output, 0x20),
+                output_len
+            )
+        }
+        require(success);
+
+        (retVal) = abi.decode(output, (string));
+        return retVal;
+    }
+
+    /**
+     * @dev Reads a 128 bit integer from a map in a ZRC2 contract
+     * @param variable_name The name of the map in the ZRC2 contract
+     * @param addressMapKey The key to the map
+     * @return The value associated with the key in the map
+     */
+    function readMapUint128(
+        address target,
+        string memory variable_name,
+        address addressMapKey
+    ) internal view returns (uint128) {
+        bytes memory encodedArgs = abi.encode(
+            target,
+            variable_name,
+            addressMapKey
+        );
+        uint256 argsLength = encodedArgs.length;
+        bytes memory output = new bytes(36);
+
+        assembly {
+            let alwaysSuccessForThisPrecompile := staticcall(
+                21000,
+                SCILLA_STATE_READ_PRECOMPILE_ADDRESS,
+                add(encodedArgs, 0x20),
+                argsLength,
+                add(output, 0x20),
+                32
+            )
+        }
+
+        return abi.decode(output, (uint128));
+    }
+
+    /**
+     * @dev Reads a 128 bit integer from a nested map in a ZRC2 contract
+     * @param target The address of the ZRC2 contract
+     * @param variable_name The name of the map in the ZRC2 contract
+     * @param firstMapKey The first key to the map
+     * @param secondMapKey The second key to the map
+     * @return The value associated with the keys in the map
+     */
+    function readNestedMapUint128(
+        address target,
+        string memory variable_name,
+        address firstMapKey,
+        address secondMapKey
+    ) internal view returns (uint128) {
+        bytes memory encodedArgs = abi.encode(
+            target,
+            variable_name,
+            firstMapKey,
+            secondMapKey
+        );
+        uint256 argsLength = encodedArgs.length;
+        bytes memory output = new bytes(36);
+
+        assembly {
+            let alwaysSuccessForThisPrecompile := staticcall(
+                21000,
+                SCILLA_STATE_READ_PRECOMPILE_ADDRESS,
+                add(encodedArgs, 0x20),
+                argsLength,
+                add(output, 0x20),
+                32
+            )
+        }
+
+        return abi.decode(output, (uint128));
+    }
+}
diff --git a/scilla-contracts/contracts/SwitcheoTokenZRC2.scilla b/scilla-contracts/contracts/SwitcheoTokenZRC2.scilla
new file mode 100644
index 0000000..4476e9f
--- /dev/null
+++ b/scilla-contracts/contracts/SwitcheoTokenZRC2.scilla
@@ -0,0 +1,373 @@
+scilla_version 0
+
+(***************************************************)
+(*               Associated library                *)
+(***************************************************)
+import IntUtils BoolUtils
+library FungibleToken
+
+let one_msg = 
+  fun (msg : Message) => 
+  let nil_msg = Nil {Message} in
+  Cons {Message} msg nil_msg
+
+let two_msgs =
+fun (msg1 : Message) =>
+fun (msg2 : Message) =>
+  let msgs_tmp = one_msg msg2 in
+  Cons {Message} msg1 msgs_tmp
+
+(* Error events *)
+type Error =
+| CodeIsSender
+| CodeInsufficientFunds
+| CodeInsufficientAllowance
+| CodeIsNotOwner
+| CodeInvalidAddress
+| CodeIsNotSelf
+| StagingOwnerValidationFailed
+| StagingOwnerNotExist
+
+let make_error =
+  fun (result : Error) =>
+    let result_code = 
+      match result with
+      | CodeIsSender                   => Int32 -1
+      | CodeInsufficientFunds          => Int32 -2
+      | CodeInsufficientAllowance      => Int32 -3
+      | CodeIsNotOwner                 => Int32 -4
+      | CodeInvalidAddress             => Int32 -5
+      | CodeIsNotSelf                  => Int32 -6
+      | StagingOwnerValidationFailed   => Int32 -7
+      | StagingOwnerNotExist           => Int32 -8
+      end
+    in
+    { _exception : "Error"; code : result_code }
+  
+let zero = Uint128 0
+let zero_addr = 0x0000000000000000000000000000000000000000
+let true = True
+
+(* Dummy user-defined ADT *)
+type Unit =
+| Unit
+
+let get_val =
+  fun (some_val: Option Uint128) =>
+  match some_val with
+  | Some val => val
+  | None => zero
+  end
+
+let some_addr = 
+  fun (addr: ByStr20) =>
+  Some {ByStr20} addr
+
+(***************************************************)
+(*             The contract definition             *)
+(***************************************************)
+
+contract SwitcheoTokenZRC2
+(
+  name: String,
+  symbol: String,
+  contract_owner: ByStr20,
+  decimals: Uint32,
+  init_supply: Uint128,
+  init_lockproxy: ByStr20
+)
+with
+  (* init supply should be zero *)
+  let a = builtin eq init_supply zero in
+  let b = builtin eq init_lockproxy zero_addr in
+  (* lock proxy address should not be zero address *)
+  let c = negb b in
+    andb a c
+=>
+
+(* Mutable fields *)
+
+field total_supply : Uint128 = init_supply
+
+field balances: Map ByStr20 Uint128 = Emp ByStr20 Uint128
+
+field allowances: Map ByStr20 (Map ByStr20 Uint128) 
+  = Emp ByStr20 (Map ByStr20 Uint128)
+
+field lock_proxy: ByStr20 = init_lockproxy
+
+field contractowner: ByStr20 = contract_owner
+
+field stagingcontractowner: Option ByStr20 = None {ByStr20}
+
+(**************************************)
+(*             Procedures             *)
+(**************************************)
+
+procedure ThrowError(err : Error)
+  e = make_error err;
+  throw e
+end
+
+procedure IsNotSender(address: ByStr20)
+  is_sender = builtin eq _sender address;
+  match is_sender with
+  | True =>
+    err = CodeIsSender;
+    ThrowError err
+  | False =>
+  end
+end
+
+procedure IsOwner()
+  owner <- contractowner;
+  is_owner = builtin eq _sender owner;
+  match is_owner with
+  | True =>
+  | False =>
+    err = CodeIsNotOwner;
+    ThrowError err
+  end
+end
+
+
+procedure AuthorizedMoveIfSufficientBalance(from: ByStr20, to: ByStr20, amount: Uint128)
+  o_from_bal <- balances[from];
+  bal = get_val o_from_bal;
+  can_do = uint128_le amount bal;
+  match can_do with
+  | True =>
+    (* Subtract amount from from and add it to to address *)
+    new_from_bal = builtin sub bal amount;
+    balances[from] := new_from_bal;
+    (* Adds amount to to address *)
+    get_to_bal <- balances[to];
+    new_to_bal = match get_to_bal with
+    | Some bal => builtin add bal amount
+    | None => amount
+    end;
+    balances[to] := new_to_bal
+  | False =>
+    (* Balance not sufficient *)
+    err = CodeInsufficientFunds;
+    ThrowError err
+  end
+end
+
+procedure validateAddress(address: ByStr20)
+  is_zero_addr = builtin eq address zero_addr;
+  match is_zero_addr with
+  | True =>
+    err = CodeInvalidAddress;
+    ThrowError err
+  | False =>
+  end
+end
+
+procedure isSelf()
+  is_self = builtin eq _sender _this_address;
+  match is_self with
+  | True =>
+  | False =>
+    err = CodeIsNotSelf;
+    ThrowError err
+  end
+end
+
+(* @dev Creates amount tokens and assigns them to account, increasing the tital supply *)
+procedure mint(address: ByStr20, amount: Uint128)
+  validateAddress address;
+  current_supply <- total_supply;
+  new_supply = builtin add current_supply amount;
+  total_supply := new_supply;
+
+  get_bal <- balances[address];
+  new_bal = match get_bal with
+  | Some bal => builtin add bal amount
+  | None => amount
+  end;
+  balances[address] := new_bal
+end
+
+(* @dev Destorys amount token from address, reducing the total supply *)
+procedure burn(address: ByStr20, amount: Uint128)
+  validateAddress address;
+  current_supply <- total_supply;
+  new_supply = builtin sub current_supply amount;
+  total_supply := new_supply;
+
+  o_from_bal <- balances[address];
+  bal = get_val o_from_bal;
+  can_do = uint128_le amount bal;
+  match can_do with
+  | True =>
+    new_from_bal = builtin sub bal amount;
+    balances[address] := new_from_bal
+  | False =>
+    err = CodeInsufficientFunds;
+    ThrowError err
+  end
+end
+
+procedure handleMint(address: ByStr20, amount: Uint128)
+  lp <- lock_proxy;
+  is_lp = builtin eq lp address;
+  match is_lp with
+  | True =>
+    mint address amount
+  | False =>
+  end
+  
+end
+
+procedure handleBurn(address: ByStr20, amount: Uint128)
+  lp <- lock_proxy;
+  is_lp = builtin eq lp address;
+  match is_lp with
+  | True =>
+    msg_to_burn = {_tag : "Burn"; _recipient : _this_address; _amount : zero; 
+                   burn_account : address; amount : amount};
+    msgs = one_msg msg_to_burn;
+    send msgs
+  | False =>
+  end
+end
+
+
+(***************************************)
+(*             Transitions             *)
+(***************************************)
+
+transition UpdateOwner(newOwner: ByStr20)
+  IsOwner;
+  sco = Some {ByStr20} newOwner;
+  stagingcontractowner := sco
+end
+
+transition ClaimOwner()
+  stagingOwner <- stagingcontractowner;
+  match stagingOwner with
+  | Some owner =>
+    is_valid = builtin eq _sender owner;
+    match is_valid with
+    | True =>
+      contractowner := owner;
+      nonOwner = None {ByStr20};
+      stagingcontractowner := nonOwner;
+      e = { _eventname: "ClaimOwner"; new_owner: owner };
+      event e
+    | False =>
+      e = StagingOwnerValidationFailed;
+      ThrowError e
+    end
+  | None =>
+    e = StagingOwnerNotExist;
+    ThrowError e
+  end
+end
+
+(* @dev: Increase the allowance of an approved_spender over the caller tokens. Only token_owner allowed to invoke.   *)
+(* param spender:      Address of the designated approved_spender.                                                   *)
+(* param amount:       Number of tokens to be increased as allowance for the approved_spender.                       *)
+transition IncreaseAllowance(spender: ByStr20, amount: Uint128)
+  IsNotSender spender;
+  some_current_allowance <- allowances[_sender][spender];
+  current_allowance = get_val some_current_allowance;
+  new_allowance = builtin add current_allowance amount;
+  allowances[_sender][spender] := new_allowance;
+  e = {_eventname : "IncreasedAllowance"; token_owner : _sender; spender: spender; new_allowance : new_allowance};
+  event e
+end
+
+(* @dev: Decrease the allowance of an approved_spender over the caller tokens. Only token_owner allowed to invoke. *)
+(* param spender:      Address of the designated approved_spender.                                                 *)
+(* param amount:       Number of tokens to be decreased as allowance for the approved_spender.                     *)
+transition DecreaseAllowance(spender: ByStr20, amount: Uint128)
+  IsNotSender spender;
+  some_current_allowance <- allowances[_sender][spender];
+  current_allowance = get_val some_current_allowance;
+  new_allowance =
+    let amount_le_allowance = uint128_le amount current_allowance in
+      match amount_le_allowance with
+      | True => builtin sub current_allowance amount
+      | False => zero
+      end;
+  allowances[_sender][spender] := new_allowance;
+  e = {_eventname : "DecreasedAllowance"; token_owner : _sender; spender: spender; new_allowance : new_allowance};
+  event e
+end
+
+(* @dev: Moves an amount tokens from _sender to the recipient. Used by token_owner. *)
+(* @dev: Balance of recipient will increase. Balance of _sender will decrease.      *)
+(* @param to:  Address of the recipient whose balance is increased.                 *)
+(* @param amount:     Amount of tokens to be sent.                                  *)
+transition Transfer(to: ByStr20, amount: Uint128)
+  handleMint _sender amount;
+  AuthorizedMoveIfSufficientBalance _sender to amount;
+  handleBurn to amount;
+  e = {_eventname : "TransferSuccess"; sender : _sender; recipient : to; amount : amount};
+  event e;
+  (* Prevent sending to a contract address that does not support transfers of token *)
+  msg_to_recipient = {_tag : "RecipientAcceptTransfer"; _recipient : to; _amount : zero; 
+                      sender : _sender; recipient : to; amount : amount};
+  msg_to_sender = {_tag : "TransferSuccessCallBack"; _recipient : _sender; _amount : zero; 
+                  sender : _sender; recipient : to; amount : amount};
+  msgs = two_msgs msg_to_recipient msg_to_sender;
+  send msgs
+end
+
+(* @dev: Move a given amount of tokens from one address to another using the allowance mechanism. The caller must be an approved_spender. *)
+(* @dev: Balance of recipient will increase. Balance of token_owner will decrease.                                                        *)
+(* @param from:    Address of the token_owner whose balance is decreased.                                                                 *)
+(* @param to:      Address of the recipient whose balance is increased.                                                                   *)
+(* @param amount:  Amount of tokens to be transferred.                                                                                    *)
+transition TransferFrom(from: ByStr20, to: ByStr20, amount: Uint128)
+  o_spender_allowed <- allowances[from][_sender];
+  allowed = get_val o_spender_allowed;
+  can_do = uint128_le amount allowed;
+  match can_do with
+  | True =>
+    AuthorizedMoveIfSufficientBalance from to amount;
+    handleBurn to amount;
+    e = {_eventname : "TransferFromSuccess"; initiator : _sender; sender : from; recipient : to; amount : amount};
+    event e;
+    new_allowed = builtin sub allowed amount;
+    allowances[from][_sender] := new_allowed;
+    (* Prevent sending to a contract address that does not support transfers of token *)
+    msg_to_recipient = {_tag: "RecipientAcceptTransferFrom"; _recipient : to; _amount: zero; 
+                        initiator: _sender; sender : from; recipient: to; amount: amount};
+    msg_to_sender = {_tag: "TransferFromSuccessCallBack"; _recipient: _sender; _amount: zero; 
+                    initiator: _sender; sender: from; recipient: to; amount: amount};
+    msgs = two_msgs msg_to_recipient msg_to_sender;
+    send msgs
+  | False =>
+    err = CodeInsufficientAllowance;
+    ThrowError err
+  end
+end
+
+(* @dev: Burn existing tokens. Only contract self can burn.                      *)
+(* @param burn_account: Address of the token_owner whose balance is to decrease.  *)
+(* @param amount:       Number of tokens to be burned.                            *)
+transition Burn(burn_account: ByStr20, amount: Uint128)
+  isSelf;
+  burn burn_account amount;
+  lp <- lock_proxy;
+  e = { _eventname : "Burnt"; burner : lp; burn_account : burn_account; amount : amount };
+  event e;
+  (* Provide the sender the status of the burn. *)
+  msg_call_back = { _tag: "BurnSuccessCallBack"; _recipient : _sender; _amount: zero;
+                  burner: lp; burn_account: burn_account; amount: amount };
+  msgs = one_msg msg_call_back;
+  send msgs
+end
+
+transition ChangeLockProxy(addr: ByStr20)
+  IsOwner;
+  lock_proxy := addr;
+  e = {_eventname : "ChangeLockProxy"; lockproxy : addr};
+  event e
+end
+
+transition BurnSuccessCallBack(burner: ByStr20, burn_account: ByStr20, amount: Uint128)
+end
\ No newline at end of file
diff --git a/scilla-contracts/contracts/ZRC2ProxyForZRC2.sol b/scilla-contracts/contracts/ZRC2ProxyForZRC2.sol
new file mode 100644
index 0000000..4332aeb
--- /dev/null
+++ b/scilla-contracts/contracts/ZRC2ProxyForZRC2.sol
@@ -0,0 +1,116 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+pragma solidity ^0.8.20;
+
+import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
+import {SafeCast} from "@openzeppelin/contracts/utils/math/SafeCast.sol";
+import {ScillaConnector} from "./ScillaConnector.sol";
+
+contract ZRC2ProxyForZRC2 is IERC20 {
+    using ScillaConnector for address;
+    using SafeCast for uint256;
+
+    address public zrc2_proxy;
+
+    // Additional variables useful for wallets
+    uint8 public decimals;
+    string public symbol;
+    string public name;
+
+    /**
+     * @notice Constructs a new ZRC2Proxy contract
+     * @param zrc2_address The address of the underlying ZRC2 contract
+     */
+    constructor(address zrc2_address) {
+        zrc2_proxy = zrc2_address;
+
+        symbol = zrc2_proxy.readString("symbol");
+        decimals = uint256(zrc2_proxy.readUint32("decimals")).toUint8();
+        name = zrc2_proxy.readString("name");
+    }
+
+    /**
+     * @notice Get the total supply of tokens
+     * @return The total supply of tokens
+     */
+    function totalSupply() external view returns (uint256) {
+        return zrc2_proxy.readUint128("total_supply");
+    }
+
+    /**
+     * @notice Get the token balance for a specific account
+     * @param tokenOwner The address of the account
+     * @return The balance of the account
+     */
+    function balanceOf(address tokenOwner) external view returns (uint256) {
+        return zrc2_proxy.readMapUint128("balances", tokenOwner);
+    }
+
+    /**
+     * @notice Transfer tokens to a specified address
+     * @param to The address to transfer to
+     * @param tokens The amount of tokens to transfer
+     * @return true if transfer was successful
+     */
+    function transfer(address to, uint256 tokens) external returns (bool) {
+        zrc2_proxy.call("Transfer", to, tokens.toUint128());
+        return true;
+    }
+
+    /**
+     * @notice Transfer tokens from one address to another
+     * @param from The address to transfer from
+     * @param to The address to transfer to
+     * @param tokens The amount of tokens to transfer
+     * @return true if transfer was successful
+     */
+    function transferFrom(
+        address from,
+        address to,
+        uint256 tokens
+    ) external returns (bool) {
+        zrc2_proxy.call("TransferFrom", from, to, tokens.toUint128());
+        return true;
+    }
+
+    /**
+     * @notice Check the amount of tokens that an owner has allowed a spender to use
+     * @param tokenOwner The address of the token owner
+     * @param spender The address of the spender
+     * @return The amount of tokens remaining for the spender
+     */
+    function allowance(
+        address tokenOwner,
+        address spender
+    ) external view returns (uint256) {
+        return
+            zrc2_proxy.readNestedMapUint128("allowances", tokenOwner, spender);
+    }
+
+    /**
+     * @notice Approve a spender to spend a certain amount of tokens
+     * @param spender The address of the spender
+     * @param new_allowance The new allowance for the spender
+     * @return true if approval was successful
+     */
+    function approve(
+        address spender,
+        uint256 new_allowance
+    ) external returns (bool) {
+        uint256 current_allowance = this.allowance(msg.sender, spender);
+
+        if (current_allowance >= new_allowance) {
+            zrc2_proxy.call(
+                "DecreaseAllowance",
+                spender,
+                (current_allowance - new_allowance).toUint128()
+            );
+        } else {
+            zrc2_proxy.call(
+                "IncreaseAllowance",
+                spender,
+                (new_allowance - current_allowance).toUint128()
+            );
+        }
+        return true;
+    }
+}
diff --git a/scilla-contracts/hardhat.config.js b/scilla-contracts/hardhat.config.js
new file mode 100644
index 0000000..5924682
--- /dev/null
+++ b/scilla-contracts/hardhat.config.js
@@ -0,0 +1,24 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+require("@nomicfoundation/hardhat-toolbox");
+require("hardhat-scilla-plugin");
+const config = {
+  solidity: "0.8.24",
+  networks: {
+    zq_testnet: {
+      url: "https://dev-api.zilliqa.com",
+      websocketUrl: "wss://dev-api.zilliqa.com",
+      accounts: [process.env.PRIVATE_KEY_ZILBRIDGE],
+      chainId: 33101,
+      zilliqaNetwork: true,
+    },
+    zq_testnet_mitmweb: {
+      url: "http://localhost:6200",
+      websocketUrl: "ws://localhost:6200",
+      accounts: [process.env.PRIVATE_KEY_ZILBRIDGE],
+      chainId: 33101,
+      zilliqaNetwork: true,
+    },
+  },
+};
+exports.default = config;
diff --git a/scilla-contracts/hardhat.config.ts b/scilla-contracts/hardhat.config.ts
new file mode 100644
index 0000000..db23c38
--- /dev/null
+++ b/scilla-contracts/hardhat.config.ts
@@ -0,0 +1,25 @@
+import { HardhatUserConfig } from "hardhat/config";
+import "@nomicfoundation/hardhat-toolbox";
+import "hardhat-scilla-plugin";
+
+const config: HardhatUserConfig = {
+  solidity: "0.8.24",
+  networks: {
+    zq_testnet: {
+      url: "https://dev-api.zilliqa.com",
+      websocketUrl: "wss://dev-api.zilliqa.com",
+      accounts: [process.env.PRIVATE_KEY_ZILBRIDGE],
+      chainId: 33101,
+      zilliqaNetwork: true,
+    },
+    zq_testnet_mitmweb: {
+      url: "http://localhost:6200",
+      websocketUrl: "ws://localhost:6200",
+      accounts: [process.env.PRIVATE_KEY_ZILBRIDGE],
+      chainId: 33101,
+      zilliqaNetwork: true,
+    },
+  },
+};
+
+export default config;
diff --git a/scilla-contracts/ignition/modules/Lock.js b/scilla-contracts/ignition/modules/Lock.js
new file mode 100644
index 0000000..0cfdbe0
--- /dev/null
+++ b/scilla-contracts/ignition/modules/Lock.js
@@ -0,0 +1,14 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+const modules_1 = require("@nomicfoundation/hardhat-ignition/modules");
+const JAN_1ST_2030 = 1893456000;
+const ONE_GWEI = 1000000000n;
+const LockModule = (0, modules_1.buildModule)("LockModule", (m) => {
+  const unlockTime = m.getParameter("unlockTime", JAN_1ST_2030);
+  const lockedAmount = m.getParameter("lockedAmount", ONE_GWEI);
+  const lock = m.contract("Lock", [unlockTime], {
+    value: lockedAmount,
+  });
+  return { lock };
+});
+exports.default = LockModule;
diff --git a/scilla-contracts/ignition/modules/Lock.ts b/scilla-contracts/ignition/modules/Lock.ts
new file mode 100644
index 0000000..eda0eba
--- /dev/null
+++ b/scilla-contracts/ignition/modules/Lock.ts
@@ -0,0 +1,17 @@
+import { buildModule } from "@nomicfoundation/hardhat-ignition/modules";
+
+const JAN_1ST_2030 = 1893456000;
+const ONE_GWEI: bigint = 1_000_000_000n;
+
+const LockModule = buildModule("LockModule", (m) => {
+  const unlockTime = m.getParameter("unlockTime", JAN_1ST_2030);
+  const lockedAmount = m.getParameter("lockedAmount", ONE_GWEI);
+
+  const lock = m.contract("Lock", [unlockTime], {
+    value: lockedAmount,
+  });
+
+  return { lock };
+});
+
+export default LockModule;
diff --git a/scilla-contracts/package-lock.json b/scilla-contracts/package-lock.json
new file mode 100644
index 0000000..ad22fa1
--- /dev/null
+++ b/scilla-contracts/package-lock.json
@@ -0,0 +1,8113 @@
+{
+  "name": "scilla-contracts",
+  "version": "1.0.0",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "scilla-contracts",
+      "version": "1.0.0",
+      "license": "ISC",
+      "dependencies": {
+        "@openzeppelin/contracts": "^5.0.2",
+        "hardhat-scilla-plugin": "^3.8.0"
+      },
+      "devDependencies": {
+        "@nomicfoundation/hardhat-toolbox": "^5.0.0",
+        "hardhat": "^2.22.6"
+      }
+    },
+    "node_modules/@adraffy/ens-normalize": {
+      "version": "1.10.1",
+      "resolved": "https://registry.npmjs.org/@adraffy/ens-normalize/-/ens-normalize-1.10.1.tgz",
+      "integrity": "sha512-96Z2IP3mYmF1Xg2cDm8f1gWGf/HUVedQ3FMifV4kG/PQ4yEP51xDtRAEfhVNt5f/uzpNkZHwWQuUcu6D6K+Ekw==",
+      "dev": true,
+      "peer": true
+    },
+    "node_modules/@cspotcode/source-map-support": {
+      "version": "0.8.1",
+      "resolved": "https://registry.npmjs.org/@cspotcode/source-map-support/-/source-map-support-0.8.1.tgz",
+      "integrity": "sha512-IchNf6dN4tHoMFIn/7OE8LWZ19Y6q/67Bmf6vnGREv8RSbBVb9LPJxEcnwrcwX6ixSvaiGoomAUvu4YSxXrVgw==",
+      "devOptional": true,
+      "peer": true,
+      "dependencies": {
+        "@jridgewell/trace-mapping": "0.3.9"
+      },
+      "engines": {
+        "node": ">=12"
+      }
+    },
+    "node_modules/@ethereumjs/rlp": {
+      "version": "4.0.1",
+      "resolved": "https://registry.npmjs.org/@ethereumjs/rlp/-/rlp-4.0.1.tgz",
+      "integrity": "sha512-tqsQiBQDQdmPWE1xkkBq4rlSW5QZpLOUJ5RJh2/9fug+q9tnUhuZoVLk7s0scUIKTOzEtR72DFBXI4WiZcMpvw==",
+      "dev": true,
+      "peer": true,
+      "bin": {
+        "rlp": "bin/rlp"
+      },
+      "engines": {
+        "node": ">=14"
+      }
+    },
+    "node_modules/@ethereumjs/util": {
+      "version": "8.1.0",
+      "resolved": "https://registry.npmjs.org/@ethereumjs/util/-/util-8.1.0.tgz",
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diff --git a/scilla-contracts/package.json b/scilla-contracts/package.json
new file mode 100644
index 0000000..2495922
--- /dev/null
+++ b/scilla-contracts/package.json
@@ -0,0 +1,19 @@
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+}
diff --git a/scilla-contracts/pnpm-lock.yaml b/scilla-contracts/pnpm-lock.yaml
new file mode 100644
index 0000000..78729ef
--- /dev/null
+++ b/scilla-contracts/pnpm-lock.yaml
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+  markdown-table@1.1.3: {}
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+  md5.js@1.3.5:
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+      chokidar: 3.6.0
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+  pbkdf2@3.1.2:
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+  readable-stream@2.3.8:
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+  recursive-readdir@2.2.3:
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+  reduce-flatten@2.0.0: {}
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+  resolve@1.22.8:
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+      path-parse: 1.0.7
+      supports-preserve-symlinks-flag: 1.0.0
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+  ripemd160@2.0.2:
+    dependencies:
+      hash-base: 3.1.0
+      inherits: 2.0.4
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+  rlp@2.2.7:
+    dependencies:
+      bn.js: 5.2.1
+
+  run-parallel@1.2.0:
+    dependencies:
+      queue-microtask: 1.2.3
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+  safe-buffer@5.2.1: {}
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+  safer-buffer@2.1.2: {}
+
+  sc-istanbul@0.4.6:
+    dependencies:
+      abbrev: 1.0.9
+      async: 1.5.2
+      escodegen: 1.8.1
+      esprima: 2.7.3
+      glob: 5.0.15
+      handlebars: 4.7.8
+      js-yaml: 3.14.1
+      mkdirp: 0.5.6
+      nopt: 3.0.6
+      once: 1.4.0
+      resolve: 1.1.7
+      supports-color: 3.2.3
+      which: 1.3.1
+      wordwrap: 1.0.0
+
+  scrypt-js@3.0.1: {}
+
+  secp256k1@4.0.3:
+    dependencies:
+      elliptic: 6.5.5
+      node-addon-api: 2.0.2
+      node-gyp-build: 4.8.1
+
+  semver@5.7.2: {}
+
+  semver@6.3.1: {}
+
+  semver@7.6.2: {}
+
+  serialize-javascript@6.0.2:
+    dependencies:
+      randombytes: 2.1.0
+
+  set-function-length@1.2.2:
+    dependencies:
+      define-data-property: 1.1.4
+      es-errors: 1.3.0
+      function-bind: 1.1.2
+      get-intrinsic: 1.2.4
+      gopd: 1.0.1
+      has-property-descriptors: 1.0.2
+
+  setimmediate@1.0.5: {}
+
+  setprototypeof@1.2.0: {}
+
+  sha.js@2.4.11:
+    dependencies:
+      inherits: 2.0.4
+      safe-buffer: 5.2.1
+
+  sha1@1.1.1:
+    dependencies:
+      charenc: 0.0.2
+      crypt: 0.0.2
+
+  shelljs@0.8.5:
+    dependencies:
+      glob: 7.2.3
+      interpret: 1.4.0
+      rechoir: 0.6.2
+
+  side-channel@1.0.6:
+    dependencies:
+      call-bind: 1.0.7
+      es-errors: 1.3.0
+      get-intrinsic: 1.2.4
+      object-inspect: 1.13.2
+
+  sisteransi@1.0.5: {}
+
+  slash@3.0.0: {}
+
+  slice-ansi@4.0.0:
+    dependencies:
+      ansi-styles: 4.3.0
+      astral-regex: 2.0.0
+      is-fullwidth-code-point: 3.0.0
+
+  solc@0.8.26(debug@4.3.5):
+    dependencies:
+      command-exists: 1.2.9
+      commander: 8.3.0
+      follow-redirects: 1.15.6(debug@4.3.5)
+      js-sha3: 0.8.0
+      memorystream: 0.3.1
+      semver: 5.7.2
+      tmp: 0.0.33
+    transitivePeerDependencies:
+      - debug
+
+  solidity-coverage@0.8.12(hardhat@2.22.6(bufferutil@4.0.8)(ts-node@10.9.2(@types/node@20.14.10)(typescript@5.5.3))(typescript@5.5.3)(utf-8-validate@5.0.10)):
+    dependencies:
+      '@ethersproject/abi': 5.7.0
+      '@solidity-parser/parser': 0.18.0
+      chalk: 2.4.2
+      death: 1.1.0
+      difflib: 0.2.4
+      fs-extra: 8.1.0
+      ghost-testrpc: 0.0.2
+      global-modules: 2.0.0
+      globby: 10.0.2
+      hardhat: 2.22.6(bufferutil@4.0.8)(ts-node@10.9.2(@types/node@20.14.10)(typescript@5.5.3))(typescript@5.5.3)(utf-8-validate@5.0.10)
+      jsonschema: 1.4.1
+      lodash: 4.17.21
+      mocha: 10.6.0
+      node-emoji: 1.11.0
+      pify: 4.0.1
+      recursive-readdir: 2.2.3
+      sc-istanbul: 0.4.6
+      semver: 7.6.2
+      shelljs: 0.8.5
+      web3-utils: 1.10.4
+
+  source-map-support@0.5.21:
+    dependencies:
+      buffer-from: 1.1.2
+      source-map: 0.6.1
+
+  source-map@0.2.0:
+    dependencies:
+      amdefine: 1.0.1
+    optional: true
+
+  source-map@0.6.1: {}
+
+  split2@3.2.2:
+    dependencies:
+      readable-stream: 3.6.2
+
+  sprintf-js@1.0.3: {}
+
+  stacktrace-parser@0.1.10:
+    dependencies:
+      type-fest: 0.7.1
+
+  statuses@2.0.1: {}
+
+  string-format@2.0.0: {}
+
+  string-width@2.1.1:
+    dependencies:
+      is-fullwidth-code-point: 2.0.0
+      strip-ansi: 4.0.0
+
+  string-width@4.2.3:
+    dependencies:
+      emoji-regex: 8.0.0
+      is-fullwidth-code-point: 3.0.0
+      strip-ansi: 6.0.1
+
+  string_decoder@1.1.1:
+    dependencies:
+      safe-buffer: 5.1.2
+
+  string_decoder@1.3.0:
+    dependencies:
+      safe-buffer: 5.2.1
+
+  strip-ansi@4.0.0:
+    dependencies:
+      ansi-regex: 3.0.1
+
+  strip-ansi@6.0.1:
+    dependencies:
+      ansi-regex: 5.0.1
+
+  strip-hex-prefix@1.0.0:
+    dependencies:
+      is-hex-prefixed: 1.0.0
+
+  strip-json-comments@3.1.1: {}
+
+  supports-color@3.2.3:
+    dependencies:
+      has-flag: 1.0.0
+
+  supports-color@5.5.0:
+    dependencies:
+      has-flag: 3.0.0
+
+  supports-color@7.2.0:
+    dependencies:
+      has-flag: 4.0.0
+
+  supports-color@8.1.1:
+    dependencies:
+      has-flag: 4.0.0
+
+  supports-preserve-symlinks-flag@1.0.0: {}
+
+  sync-request@6.1.0:
+    dependencies:
+      http-response-object: 3.0.2
+      sync-rpc: 1.3.6
+      then-request: 6.0.2
+
+  sync-rpc@1.3.6:
+    dependencies:
+      get-port: 3.2.0
+
+  table-layout@1.0.2:
+    dependencies:
+      array-back: 4.0.2
+      deep-extend: 0.6.0
+      typical: 5.2.0
+      wordwrapjs: 4.0.1
+
+  table@6.8.2:
+    dependencies:
+      ajv: 8.17.1
+      lodash.truncate: 4.4.2
+      slice-ansi: 4.0.0
+      string-width: 4.2.3
+      strip-ansi: 6.0.1
+
+  then-request@6.0.2:
+    dependencies:
+      '@types/concat-stream': 1.6.1
+      '@types/form-data': 0.0.33
+      '@types/node': 8.10.66
+      '@types/qs': 6.9.15
+      caseless: 0.12.0
+      concat-stream: 1.6.2
+      form-data: 2.5.1
+      http-basic: 8.1.3
+      http-response-object: 3.0.2
+      promise: 8.3.0
+      qs: 6.12.3
+
+  through2@4.0.2:
+    dependencies:
+      readable-stream: 3.6.2
+
+  tmp@0.0.33:
+    dependencies:
+      os-tmpdir: 1.0.2
+
+  to-regex-range@5.0.1:
+    dependencies:
+      is-number: 7.0.0
+
+  toidentifier@1.0.1: {}
+
+  ts-command-line-args@2.5.1:
+    dependencies:
+      chalk: 4.1.2
+      command-line-args: 5.2.1
+      command-line-usage: 6.1.3
+      string-format: 2.0.0
+
+  ts-essentials@7.0.3(typescript@5.5.3):
+    dependencies:
+      typescript: 5.5.3
+
+  ts-node@10.9.2(@types/node@20.14.10)(typescript@5.5.3):
+    dependencies:
+      '@cspotcode/source-map-support': 0.8.1
+      '@tsconfig/node10': 1.0.11
+      '@tsconfig/node12': 1.0.11
+      '@tsconfig/node14': 1.0.3
+      '@tsconfig/node16': 1.0.4
+      '@types/node': 20.14.10
+      acorn: 8.12.1
+      acorn-walk: 8.3.3
+      arg: 4.1.3
+      create-require: 1.1.1
+      diff: 4.0.2
+      make-error: 1.3.6
+      typescript: 5.5.3
+      v8-compile-cache-lib: 3.0.1
+      yn: 3.1.1
+
+  tslib@1.14.1: {}
+
+  tslib@2.4.0: {}
+
+  tsort@0.0.1: {}
+
+  tweetnacl-util@0.15.1: {}
+
+  tweetnacl@1.0.3: {}
+
+  type-check@0.3.2:
+    dependencies:
+      prelude-ls: 1.1.2
+
+  type-detect@4.0.8: {}
+
+  type-fest@0.20.2: {}
+
+  type-fest@0.21.3: {}
+
+  type-fest@0.7.1: {}
+
+  typechain@8.3.2(typescript@5.5.3):
+    dependencies:
+      '@types/prettier': 2.7.3
+      debug: 4.3.5(supports-color@8.1.1)
+      fs-extra: 7.0.1
+      glob: 7.1.7
+      js-sha3: 0.8.0
+      lodash: 4.17.21
+      mkdirp: 1.0.4
+      prettier: 2.8.8
+      ts-command-line-args: 2.5.1
+      ts-essentials: 7.0.3(typescript@5.5.3)
+      typescript: 5.5.3
+    transitivePeerDependencies:
+      - supports-color
+
+  typedarray@0.0.6: {}
+
+  typescript@5.5.3: {}
+
+  typical@4.0.0: {}
+
+  typical@5.2.0: {}
+
+  uglify-js@3.18.0:
+    optional: true
+
+  undici-types@5.26.5: {}
+
+  undici@5.28.4:
+    dependencies:
+      '@fastify/busboy': 2.1.1
+
+  universalify@0.1.2: {}
+
+  universalify@2.0.1: {}
+
+  unpipe@1.0.0: {}
+
+  utf-8-validate@5.0.10:
+    dependencies:
+      node-gyp-build: 4.8.1
+    optional: true
+
+  utf8@3.0.0: {}
+
+  util-deprecate@1.0.2: {}
+
+  uuid@8.3.2: {}
+
+  v8-compile-cache-lib@3.0.1: {}
+
+  web3-utils@1.10.4:
+    dependencies:
+      '@ethereumjs/util': 8.1.0
+      bn.js: 5.2.1
+      ethereum-bloom-filters: 1.1.0
+      ethereum-cryptography: 2.2.1
+      ethjs-unit: 0.1.6
+      number-to-bn: 1.7.0
+      randombytes: 2.1.0
+      utf8: 3.0.0
+
+  which@1.3.1:
+    dependencies:
+      isexe: 2.0.0
+
+  widest-line@3.1.0:
+    dependencies:
+      string-width: 4.2.3
+
+  word-wrap@1.2.5: {}
+
+  wordwrap@1.0.0: {}
+
+  wordwrapjs@4.0.1:
+    dependencies:
+      reduce-flatten: 2.0.0
+      typical: 5.2.0
+
+  workerpool@6.5.1: {}
+
+  wrap-ansi@7.0.0:
+    dependencies:
+      ansi-styles: 4.3.0
+      string-width: 4.2.3
+      strip-ansi: 6.0.1
+
+  wrappy@1.0.2: {}
+
+  ws@7.4.6(bufferutil@4.0.8)(utf-8-validate@5.0.10):
+    optionalDependencies:
+      bufferutil: 4.0.8
+      utf-8-validate: 5.0.10
+
+  ws@7.5.10(bufferutil@4.0.8)(utf-8-validate@5.0.10):
+    optionalDependencies:
+      bufferutil: 4.0.8
+      utf-8-validate: 5.0.10
+
+  ws@8.17.1(bufferutil@4.0.8)(utf-8-validate@5.0.10):
+    optionalDependencies:
+      bufferutil: 4.0.8
+      utf-8-validate: 5.0.10
+
+  y18n@5.0.8: {}
+
+  yargs-parser@20.2.9: {}
+
+  yargs-unparser@2.0.0:
+    dependencies:
+      camelcase: 6.3.0
+      decamelize: 4.0.0
+      flat: 5.0.2
+      is-plain-obj: 2.1.0
+
+  yargs@16.2.0:
+    dependencies:
+      cliui: 7.0.4
+      escalade: 3.1.2
+      get-caller-file: 2.0.5
+      require-directory: 2.1.1
+      string-width: 4.2.3
+      y18n: 5.0.8
+      yargs-parser: 20.2.9
+
+  yn@3.1.1: {}
+
+  yocto-queue@0.1.0: {}
diff --git a/scilla-contracts/scripts/debug.ts b/scilla-contracts/scripts/debug.ts
new file mode 100644
index 0000000..f5c99ff
--- /dev/null
+++ b/scilla-contracts/scripts/debug.ts
@@ -0,0 +1,32 @@
+import { ethers, config } from "hardhat";
+import { ScillaContract, initZilliqa } from "hardhat-scilla-plugin";
+
+async function main() {
+  const network = config.networks[hre.network.name];
+  const privateKeys = network.accounts[0];
+  const networkUrl = network.url;
+  const chain_id = network.chainId & ~0x8000;
+  initZilliqa(networkUrl, chain_id, [privateKeys], 40);
+  let account = hre.zilliqa.getDefaultAccount();
+  let targetAddress = process.env.TEST_ADDRESS;
+  let tokenContractAddress = process.env.SCILLA_TOKEN_ADDRESS;
+  let evmContractAddress = process.env.EVM_TOKEN_ADDRESS;
+  console.log(`Balance of ${targetAddress} in ${tokenContractAddress} .. `);
+  let tokenContract =
+    await hre.interactWithScillaContract(tokenContractAddress);
+  console.log(`${JSON.stringify(tokenContract)}`);
+  console.log(`${JSON.stringify(tokenContract.balances())}`);
+  let factory = await ethers.getContractFactory("ZRC2ProxyForZRC2");
+  console.log(`factory is ${factory}`);
+  const contract = await factory.attach(evmContractAddress);
+  console.log("got contract");
+  let result = await contract.balanceOf(targetAddress);
+  console.log(` .... ${result}`);
+}
+
+// We recommend this pattern to be able to use async/await everywhere
+// and properly handle errors.
+main().catch((error) => {
+  console.error(error);
+  process.exitCode = 1;
+});
diff --git a/scilla-contracts/scripts/deploy.ts b/scilla-contracts/scripts/deploy.ts
new file mode 100644
index 0000000..ff7ee8d
--- /dev/null
+++ b/scilla-contracts/scripts/deploy.ts
@@ -0,0 +1,68 @@
+import { ethers, config } from "hardhat";
+import { ScillaContract, initZilliqa } from "hardhat-scilla-plugin";
+
+function addressToConstant(address: string) {
+  let val = address;
+  if (address.startsWith("0x")) {
+    val = address.substring(2);
+  }
+  return "0x00" + val;
+}
+
+async function main() {
+  const network = config.networks[hre.network.name];
+  const privateKeys = network.accounts[0];
+  const networkUrl = network.url;
+  const chain_id = network.chainId & ~0x8000;
+  initZilliqa(networkUrl, chain_id, [privateKeys], 40);
+  let account = hre.zilliqa.getDefaultAccount();
+  console.log(`Deploying from ${account.address}`);
+  const zqTestnetTokenManager = process.env.TOKEN_MANAGER_ADDRESS;
+  if (zqTestnetTokenManager === undefined) {
+    throw new Error("No TOKEN_MANAGER_ADDRESS");
+  }
+  let tokenContract = await hre.deployScillaContract(
+    "SwitcheoTokenZRC2",
+    "Bridged-XTST",
+    "XTST",
+    account.address,
+    3,
+    0,
+    zqTestnetTokenManager,
+  );
+  console.log(
+    `    address public constant zqBridgedERC20Address = address(${addressToConstant(tokenContract.address)})`,
+  );
+
+  let nativeBridgedContract = await hre.deployScillaContract(
+    "SwitcheoTokenZRC2",
+    "Bridged-BNB",
+    "eBNB",
+    account.address,
+    18,
+    0,
+    zqTestnetTokenManager,
+  );
+  console.log(
+    `    address public constant zqBridgedBNBAddress = address(${addressToConstant(nativeBridgedContract.address)})`,
+  );
+
+  let local = await hre.deployScillaContract(
+    "FungibleToken",
+    account.address,
+    "zq_native Test",
+    "ZTST",
+    3,
+    1_000_000_000,
+  );
+  console.log(
+    `    address public constant zqZRC2Address = address(${addressToConstant(local.address)})`,
+  );
+}
+
+// We recommend this pattern to be able to use async/await everywhere
+// and properly handle errors.
+main().catch((error) => {
+  console.error(error);
+  process.exitCode = 1;
+});
diff --git a/scilla-contracts/scripts/transfer.ts b/scilla-contracts/scripts/transfer.ts
new file mode 100644
index 0000000..86528b9
--- /dev/null
+++ b/scilla-contracts/scripts/transfer.ts
@@ -0,0 +1,28 @@
+import { ethers, config } from "hardhat";
+import { ScillaContract, initZilliqa } from "hardhat-scilla-plugin";
+
+async function main() {
+  const network = config.networks[hre.network.name];
+  const privateKeys = network.accounts[0];
+  const networkUrl = network.url;
+  const chain_id = network.chainId & ~0x8000;
+  initZilliqa(networkUrl, chain_id, [privateKeys], 40);
+  let account = hre.zilliqa.getDefaultAccount();
+  let targetAddress = process.env.ZILBRIDGE_TEST_ADDRESS;
+  let testAmount = process.env.ZILBRIDGE_TEST_AMOUNT;
+  let tokenContractAddress = process.env.ZILBRIDGE_SCILLA_TOKEN_ADDRESS;
+  console.log(
+    `transferring ${testAmount} of ${tokenContractAddress} from ${account.address} to ${targetAddress}`,
+  );
+  let tokenContract =
+    await hre.interactWithScillaContract(tokenContractAddress);
+  let result = await tokenContract.Transfer(targetAddress, testAmount);
+  console.log(`result = ${JSON.stringify(result)}`);
+}
+
+// We recommend this pattern to be able to use async/await everywhere
+// and properly handle errors.
+main().catch((error) => {
+  console.error(error);
+  process.exitCode = 1;
+});
diff --git a/scilla-contracts/tsconfig.json b/scilla-contracts/tsconfig.json
new file mode 100644
index 0000000..574e785
--- /dev/null
+++ b/scilla-contracts/tsconfig.json
@@ -0,0 +1,11 @@
+{
+  "compilerOptions": {
+    "target": "es2020",
+    "module": "commonjs",
+    "esModuleInterop": true,
+    "forceConsistentCasingInFileNames": true,
+    "strict": true,
+    "skipLibCheck": true,
+    "resolveJsonModule": true
+  }
+}
diff --git a/smart-contracts/README.md b/smart-contracts/README.md
index 4f65145..5c1c835 100644
--- a/smart-contracts/README.md
+++ b/smart-contracts/README.md
@@ -277,16 +277,21 @@ Deterministic deployer not available, simple CREATE was used
 
 ### Zilliqa Testnet
 
+See `script/configTestnet.s.sol` for up to date information.
+
 - `ChainId`: 33101
 - `ChainGateway`: `0x7370e69565BB2313C4dA12F9062C282513919230`
 - `ValidatorManager`: `0x782F8afa1bA3137a214D49840688215a8A379fA8`
 - `LockAndReleaseTokenManager`: `0x1509988c41f02014aA59d455c6a0D67b5b50f129`
 - `TestTokenZRC2Proxy`: `0x8618d39a8276D931603c6Bc7306af6A53aD2F1F3`
+- `LockAndReleaseOrNativeTokenManager`: `0xBe90AB2cd65E207F097bEF733F8D239A59698b8A`
 
 Deterministic deployer not available, simple CREATE was used
 
 ### BSC Testnet
 
+See `script/configTestnet.s.sol` for up to date information.
+
 - `ChainId`: 97
 - `ChainGateway`: `0xa9A14C90e53EdCD89dFd201A3bF94D867f8098fE`
 - `ValidatorManager`: `0xCc1CB36d981ae2907cea385F615e879434D20B1C`
diff --git a/smart-contracts/contracts/periphery/LockProxyTokenManagerStorage.sol b/smart-contracts/contracts/periphery/LockProxyTokenManagerStorage.sol
new file mode 100644
index 0000000..80e59ab
--- /dev/null
+++ b/smart-contracts/contracts/periphery/LockProxyTokenManagerStorage.sol
@@ -0,0 +1,38 @@
+// SPDX-License-Identifier: MIT OR Apache-2.0
+pragma solidity ^0.8.20;
+
+import {Initializable} from "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";
+
+interface ILockProxyTokenManagerStorage {
+  event LockProxyUpdated(address oldLockProxy, address newLockProxy);
+  function getLockProxy() external view returns (address);
+  function setLockProxy(address lockProxy) external;
+}
+
+abstract contract LockProxyTokenManagerStorage is ILockProxyTokenManagerStorage {
+  /// @custom:storage-location erc7201:zilliqa.storage.LockProxyTokenManagerStorage
+  struct LockProxyTokenManagerStorageStruct {
+    address lockProxy;
+  }
+
+  // keccack256(abi.encode(uint256(keccack256("zilliqa.storage.LockProxyTokenManagerStorage"))-1)) & ~bytes32(uint256(0xff))
+  bytes32 private constant Lock_Proxy_Storage_Location = 0xb22af1dfa3d79e3af56bf3b03e8c9cb6d48fc6bbb7ec48dcbfc0dbccf342f800;
+
+  function _getLockProxyTokenManagerStorageStruct() private pure returns (LockProxyTokenManagerStorageStruct storage $)
+  {
+    assembly {
+   $.slot := Lock_Proxy_Storage_Location
+    }
+  }
+
+  function getLockProxy() public view returns (address) {
+    LockProxyTokenManagerStorageStruct storage $ = _getLockProxyTokenManagerStorageStruct();
+    return $.lockProxy;
+  }
+
+  function _setLockProxy(address lockProxy) internal {
+    LockProxyTokenManagerStorageStruct storage $ = _getLockProxyTokenManagerStorageStruct();
+    emit LockProxyUpdated($.lockProxy, lockProxy);
+    $.lockProxy = lockProxy;
+  }
+}
diff --git a/smart-contracts/contracts/periphery/LockProxyTokenManagerUpgradeable.sol b/smart-contracts/contracts/periphery/LockProxyTokenManagerUpgradeable.sol
new file mode 100644
index 0000000..cb145f8
--- /dev/null
+++ b/smart-contracts/contracts/periphery/LockProxyTokenManagerUpgradeable.sol
@@ -0,0 +1,54 @@
+// SPDX-License-Identifier: MIT OR Apache-2.0
+pragma solidity ^0.8.20;
+
+import {TokenManagerUpgradeable, ITokenManager} from "contracts/periphery/TokenManagerUpgradeable.sol";
+import { ILockProxyTokenManagerStorage, LockProxyTokenManagerStorage } from "contracts/periphery/LockProxyTokenManagerStorage.sol";
+import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
+
+interface ILockProxyTokenManager is ITokenManager {
+  // Args in this order to match other token managers.
+  event SentToLockProxy(address indexed token, address indexed sender, uint amount);
+  event WithdrawnFromLockProxy(address indexed token, address indexed receipient, uint amount);
+  function setLockProxy(address lockProxy) external;
+}
+
+// This contract exists almost entirely to be used in tests to prove upgradeability.
+contract LockProxyTokenManagerUpgradeable is
+    ILockProxyTokenManager,
+  TokenManagerUpgradeable,
+  LockProxyTokenManagerStorage
+{
+    /// @custom:oz-upgrades-unsafe-allow constructor
+    constructor() {
+        _disableInitializers();
+    }
+
+
+    function setLockProxy(address lockProxy) external override(ILockProxyTokenManagerStorage, ILockProxyTokenManager) onlyOwner {
+      _setLockProxy(lockProxy);
+    }
+
+    function initialize(address _gateway, address lockProxy) external initializer {
+        __TokenManager_init(_gateway);
+        // for some reason we can't call setLockProxy() here, so ..
+        _setLockProxy(lockProxy);
+    }
+
+    // Outgoing
+    function _handleTransfer(
+        address /* token */,
+        address /* from */,
+        uint /* amount */
+    ) pure internal override {
+      revert();
+    }
+
+    // Incoming
+    function _handleAccept(
+        address /* token */,
+        address /* recipient */,
+        uint /* amount */
+    ) pure internal override {
+      revert();
+    }
+}
diff --git a/smart-contracts/contracts/periphery/TokenManagerV3/LockAndReleaseOrNativeTokenManagerUpgradeableV3.sol b/smart-contracts/contracts/periphery/TokenManagerV3/LockAndReleaseOrNativeTokenManagerUpgradeableV3.sol
new file mode 100644
index 0000000..a17ede0
--- /dev/null
+++ b/smart-contracts/contracts/periphery/TokenManagerV3/LockAndReleaseOrNativeTokenManagerUpgradeableV3.sol
@@ -0,0 +1,82 @@
+// SPDX-License-Identifier: MIT OR Apache-2.0
+pragma solidity ^0.8.20;
+
+import {TokenManagerUpgradeableV3, ITokenManager} from "contracts/periphery/TokenManagerV3/TokenManagerUpgradeableV3.sol";
+import {IERC20} from "contracts/periphery/LockAndReleaseTokenManagerUpgradeable.sol";
+import {IRelayer, CallMetadata} from "contracts/core/Relayer.sol";
+
+interface ILockAndReleaseOrNativeTokenManager {
+    event Locked(address indexed token, address indexed from, uint amount);
+    event Released(
+        address indexed token,
+        address indexed recipient,
+        uint amount
+    );
+}
+
+contract LockAndReleaseOrNativeTokenManagerUpgradeableV3 is
+    ILockAndReleaseOrNativeTokenManager,
+    TokenManagerUpgradeableV3
+{
+    address public constant NATIVE_ASSET_HASH = address(0);
+
+    /// @custom:oz-upgrades-unsafe-allow constructor
+    constructor() {
+        _disableInitializers();
+    }
+
+    /// @dev Allow this contract to receive native tokens.
+    receive() external payable {}
+
+    // Outgoing
+    function _handleTransfer(
+        address token,
+        address from,
+        uint amount
+    ) internal override {
+      if (token == NATIVE_ASSET_HASH) {
+        (bool success, ) = payable(this).call{ value: amount }("");
+        require(success, "Native asset transfer failed");
+      } else {
+        IERC20(token).transferFrom(from, address(this), amount);
+      }
+      emit Locked(token, from, amount);
+    }
+
+    // Incoming
+    function _handleAccept(
+        address token,
+        address recipient,
+        uint amount
+    ) internal override {
+      if (token == NATIVE_ASSET_HASH) {
+        (bool success, ) = recipient.call{value: amount}("");
+        require(success, "Native asset transfer failed");
+      } else {
+        IERC20(token).transfer(recipient, amount);
+      }
+      emit Released(token, recipient, amount);
+    }
+
+    function xtransfer(
+        address token,
+        uint remoteChainId,
+        address remoteRecipient,
+        uint amount
+    ) external payable virtual whenNotPaused checkFees {
+        RemoteToken memory remoteToken = getRemoteTokens(token, remoteChainId);
+
+        // Works here.
+        _handleTransfer(token, _msgSender(), amount);
+
+        // Works here.
+        IRelayer(getGateway()).relayWithMetadata(
+            remoteToken.chainId,
+            remoteToken.tokenManager,
+            this.accept.selector,
+            abi.encode(AcceptArgs(remoteToken.token, remoteRecipient, amount)),
+            1_000_000
+        );
+        // Fails here.
+    }
+}
diff --git a/smart-contracts/contracts/periphery/TokenManagerV3/LockProxyTokenManagerUpgradeableV3.sol b/smart-contracts/contracts/periphery/TokenManagerV3/LockProxyTokenManagerUpgradeableV3.sol
new file mode 100644
index 0000000..2e61fe0
--- /dev/null
+++ b/smart-contracts/contracts/periphery/TokenManagerV3/LockProxyTokenManagerUpgradeableV3.sol
@@ -0,0 +1,77 @@
+// SPDX-License-Identifier: MIT OR Apache-2.0
+pragma solidity ^0.8.20;
+
+import {TokenManagerUpgradeableV3, ITokenManager} from "contracts/periphery/TokenManagerV3/TokenManagerUpgradeableV3.sol";
+import {BridgedToken} from "contracts/periphery/BridgedToken.sol";
+import {IERC20} from "contracts/periphery/LockAndReleaseTokenManagerUpgradeable.sol";
+import { ILockProxyTokenManagerStorage, LockProxyTokenManagerStorage } from "contracts/periphery/LockProxyTokenManagerStorage.sol";
+
+interface ILockProxyTokenManager is ILockProxyTokenManagerStorage {
+  // Args in this order to match other token managers.
+  event SentToLockProxy(address indexed token, address indexed sender, uint amount);
+  event WithdrawnFromLockProxy(address indexed token, address indexed receipient, uint amount);
+}
+
+// Exists purely so that we can call the extensionTransfer() endpoint on the lock proxy without having
+// to include its code here.
+interface ILockProxyExtensionTransfer {
+    function extensionTransfer(
+        address _receivingAddress,
+        address _assetHash,
+        uint256 _amount
+    )
+        external
+        returns (bool);
+}
+
+// This is the lock proxy token manager that runs on EVM chains. It talks to an EVM LockProxy.
+contract LockProxyTokenManagerUpgradeableV3 is TokenManagerUpgradeableV3, ILockProxyTokenManager, LockProxyTokenManagerStorage {
+  address public constant NATIVE_ASSET_HASH = address(0);
+
+  constructor() {
+    _disableInitializers();
+  }
+
+  function reinitialize(uint fees) external reinitializer(2) {
+    _setFees(fees);
+  }
+
+  // Incoming currency - transfer into the lock proxy
+  function _handleTransfer(address token, address from, uint amount) internal override {
+    address lockProxyAddress = getLockProxy();
+    // Just transfer value to the lock proxy.
+    if (token == NATIVE_ASSET_HASH) {
+      (bool success, ) = lockProxyAddress.call{value: amount}("");
+      emit SentToLockProxy(token, from, amount);
+      require(success, "Transfer failed");
+      return;
+    }
+
+    IERC20 erc20token = IERC20(token);
+    erc20token.transferFrom(from, address(lockProxyAddress), amount);
+    emit SentToLockProxy(token, from, amount);
+  }
+
+  function _handleAccept(address token, address recipient, uint amount) internal override {
+    address lockProxyAddress = getLockProxy();
+    ILockProxyExtensionTransfer lp = ILockProxyExtensionTransfer(payable(lockProxyAddress));
+    // Sadly, extensionTransfer() takes the same arguments as the withdrawn event but in a
+    // different order. This will automagically transfer native token if token==0.
+
+    // Native tokens are transferred by the call; for everyone else, it sets an allowance and we
+    // then do the transfer from here.
+    if (token == address(0)) {
+      lp.extensionTransfer(recipient, address(0), amount);
+    } else {
+      lp.extensionTransfer(address(this), token, amount);
+      IERC20 erc20token = IERC20(token);
+      erc20token.transferFrom(address(lp), recipient, amount);
+    }
+    emit WithdrawnFromLockProxy(token, recipient, amount);
+  }
+
+  function setLockProxy(address lockProxy) external onlyOwner {
+    _setLockProxy(lockProxy);
+  }
+
+}
diff --git a/smart-contracts/contracts/periphery/ZilBridge/ccmCrossChainManager.sol b/smart-contracts/contracts/periphery/ZilBridge/ccmCrossChainManager.sol
new file mode 100644
index 0000000..cbbffd1
--- /dev/null
+++ b/smart-contracts/contracts/periphery/ZilBridge/ccmCrossChainManager.sol
@@ -0,0 +1,1618 @@
+/**
+ *Submitted for verification at Etherscan.io on 2021-10-19
+*/
+
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.2;
+
+abstract contract Context {
+    // Empty internal constructor, to prevent people from mistakenly deploying
+    // an instance of this contract, which should be used via inheritance.
+    constructor () { }
+    // solhint-disable-previous-line no-empty-blocks
+
+    function _msgSender() internal view returns (address payable) {
+      return payable(msg.sender);
+    }
+
+    function _msgData() internal view returns (bytes memory) {
+        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
+        return msg.data;
+    }
+}
+
+interface IOwnable {
+      function isOwner() external view returns (bool);
+}
+
+abstract contract Ownable is Context, IOwnable {
+    address private _owner;
+
+    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
+
+    /**
+     * @dev Initializes the contract setting the deployer as the initial owner.
+     */
+    constructor () {
+        address msgSender = _msgSender();
+        _owner = msgSender;
+        emit OwnershipTransferred(address(0), msgSender);
+    }
+
+    /**
+     * @dev Returns the address of the current owner.
+     */
+    function owner() public view returns (address) {
+        return _owner;
+    }
+
+    /**
+     * @dev Throws if called by any account other than the owner.
+     */
+    modifier onlyOwner() {
+        require(isOwner(), "Ownable: caller is not the owner");
+        _;
+    }
+
+    /**
+     * @dev Returns true if the caller is the current owner.
+     */
+    function isOwner() public view returns (bool) {
+        return _msgSender() == _owner;
+    }
+
+    /**
+     * @dev Leaves the contract without owner. It will not be possible to call
+     * `onlyOwner` functions anymore. Can only be called by the current owner.
+     *
+     * NOTE: Renouncing ownership will leave the contract without an owner,
+     * thereby removing any functionality that is only available to the owner.
+     */
+    function renounceOwnership() public onlyOwner {
+        emit OwnershipTransferred(_owner, address(0));
+        _owner = address(0);
+    }
+
+    /**
+     * @dev Transfers ownership of the contract to a new account (`newOwner`).
+     * Can only be called by the current owner.
+     */
+    function transferOwnership(address newOwner) public  onlyOwner {
+        _transferOwnership(newOwner);
+    }
+
+    /**
+     * @dev Transfers ownership of the contract to a new account (`newOwner`).
+     */
+    function _transferOwnership(address newOwner) internal {
+        require(newOwner != address(0), "Ownable: new owner is the zero address");
+        emit OwnershipTransferred(_owner, newOwner);
+        _owner = newOwner;
+    }
+}
+
+interface IPausable {
+    function paused() external view returns (bool);
+}
+
+abstract contract Pausable is Context, IPausable {
+    /**
+     * @dev Emitted when the pause is triggered by a pauser (`account`).
+     */
+    event Paused(address account);
+
+    /**
+     * @dev Emitted when the pause is lifted by a pauser (`account`).
+     */
+    event Unpaused(address account);
+
+    bool private _paused;
+
+    /**
+     * @dev Initializes the contract in unpaused state.
+     */
+    constructor () {
+        _paused = false;
+    }
+
+    /**
+     * @dev Returns true if the contract is paused, and false otherwise.
+     */
+    function paused() public view returns (bool) {
+        return _paused;
+    }
+
+    /**
+     * @dev Modifier to make a function callable only when the contract is not paused.
+     */
+    modifier whenNotPaused() {
+        require(!_paused, "Pausable: paused");
+        _;
+    }
+
+    /**
+     * @dev Modifier to make a function callable only when the contract is paused.
+     */
+    modifier whenPaused() {
+        require(_paused, "Pausable: not paused");
+        _;
+    }
+
+    /**
+     * @dev Called to pause, triggers stopped state.
+     */
+    function _pause() internal whenNotPaused {
+        _paused = true;
+        emit Paused(_msgSender());
+    }
+
+    /**
+     * @dev Called to unpause, returns to normal state.
+     */
+    function _unpause() internal whenPaused {
+        _paused = false;
+        emit Unpaused(_msgSender());
+    }
+}
+
+library ZeroCopySink {
+    /* @notice          Convert boolean value into bytes
+    *  @param b         The boolean value
+    *  @return          Converted bytes array
+    */
+    function WriteBool(bool b) internal pure returns (bytes memory) {
+        bytes memory buff;
+        assembly{
+            buff := mload(0x40)
+            mstore(buff, 1)
+            switch iszero(b)
+            case 1 {
+                mstore(add(buff, 0x20), shl(248, 0x00))
+                // mstore8(add(buff, 0x20), 0x00)
+            }
+            default {
+                mstore(add(buff, 0x20), shl(248, 0x01))
+                // mstore8(add(buff, 0x20), 0x01)
+            }
+            mstore(0x40, add(buff, 0x21))
+        }
+        return buff;
+    }
+
+    /* @notice          Convert byte value into bytes
+    *  @param b         The byte value
+    *  @return          Converted bytes array
+    */
+    function WriteByte(bytes1 b) internal pure returns (bytes memory) {
+        return WriteUint8(uint8(b));
+    }
+
+    /* @notice          Convert uint8 value into bytes
+    *  @param v         The uint8 value
+    *  @return          Converted bytes array
+    */
+    function WriteUint8(uint8 v) internal pure returns (bytes memory) {
+        bytes memory buff;
+        assembly{
+            buff := mload(0x40)
+            mstore(buff, 1)
+            mstore(add(buff, 0x20), shl(248, v))
+            // mstore(add(buff, 0x20), byte(0x1f, v))
+            mstore(0x40, add(buff, 0x21))
+        }
+        return buff;
+    }
+
+    /* @notice          Convert uint16 value into bytes
+    *  @param v         The uint16 value
+    *  @return          Converted bytes array
+    */
+    function WriteUint16(uint16 v) internal pure returns (bytes memory) {
+        bytes memory buff;
+
+        assembly{
+            buff := mload(0x40)
+            let byteLen := 0x02
+            mstore(buff, byteLen)
+            for {
+                let mindex := 0x00
+                let vindex := 0x1f
+            } lt(mindex, byteLen) {
+                mindex := add(mindex, 0x01)
+                vindex := sub(vindex, 0x01)
+            }{
+                mstore8(add(add(buff, 0x20), mindex), byte(vindex, v))
+            }
+            mstore(0x40, add(buff, 0x22))
+        }
+        return buff;
+    }
+    
+    /* @notice          Convert uint32 value into bytes
+    *  @param v         The uint32 value
+    *  @return          Converted bytes array
+    */
+    function WriteUint32(uint32 v) internal pure returns(bytes memory) {
+        bytes memory buff;
+        assembly{
+            buff := mload(0x40)
+            let byteLen := 0x04
+            mstore(buff, byteLen)
+            for {
+                let mindex := 0x00
+                let vindex := 0x1f
+            } lt(mindex, byteLen) {
+                mindex := add(mindex, 0x01)
+                vindex := sub(vindex, 0x01)
+            }{
+                mstore8(add(add(buff, 0x20), mindex), byte(vindex, v))
+            }
+            mstore(0x40, add(buff, 0x24))
+        }
+        return buff;
+    }
+
+    /* @notice          Convert uint64 value into bytes
+    *  @param v         The uint64 value
+    *  @return          Converted bytes array
+    */
+    function WriteUint64(uint64 v) internal pure returns(bytes memory) {
+        bytes memory buff;
+
+        assembly{
+            buff := mload(0x40)
+            let byteLen := 0x08
+            mstore(buff, byteLen)
+            for {
+                let mindex := 0x00
+                let vindex := 0x1f
+            } lt(mindex, byteLen) {
+                mindex := add(mindex, 0x01)
+                vindex := sub(vindex, 0x01)
+            }{
+                mstore8(add(add(buff, 0x20), mindex), byte(vindex, v))
+            }
+            mstore(0x40, add(buff, 0x28))
+        }
+        return buff;
+    }
+
+    /* @notice          Convert limited uint256 value into bytes
+    *  @param v         The uint256 value
+    *  @return          Converted bytes array
+    */
+    function WriteUint255(uint256 v) internal pure returns (bytes memory) {
+        require(v <= 0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff, "Value exceeds uint255 range");
+        bytes memory buff;
+
+        assembly{
+            buff := mload(0x40)
+            let byteLen := 0x20
+            mstore(buff, byteLen)
+            for {
+                let mindex := 0x00
+                let vindex := 0x1f
+            } lt(mindex, byteLen) {
+                mindex := add(mindex, 0x01)
+                vindex := sub(vindex, 0x01)
+            }{
+                mstore8(add(add(buff, 0x20), mindex), byte(vindex, v))
+            }
+            mstore(0x40, add(buff, 0x40))
+        }
+        return buff;
+    }
+
+    /* @notice          Encode bytes format data into bytes
+    *  @param data      The bytes array data
+    *  @return          Encoded bytes array
+    */
+    function WriteVarBytes(bytes memory data) internal pure returns (bytes memory) {
+        uint64 l = uint64(data.length);
+        return abi.encodePacked(WriteVarUint(l), data);
+    }
+
+    function WriteVarUint(uint64 v) internal pure returns (bytes memory) {
+        if (v < 0xFD){
+    		return WriteUint8(uint8(v));
+    	} else if (v <= 0xFFFF) {
+    		return abi.encodePacked(WriteByte(0xFD), WriteUint16(uint16(v)));
+    	} else if (v <= 0xFFFFFFFF) {
+            return abi.encodePacked(WriteByte(0xFE), WriteUint32(uint32(v)));
+    	} else {
+    		return abi.encodePacked(WriteByte(0xFF), WriteUint64(uint64(v)));
+    	}
+    }
+}
+
+library ZeroCopySource {
+    /* @notice              Read next byte as boolean type starting at offset from buff
+    *  @param buff          Source bytes array
+    *  @param offset        The position from where we read the boolean value
+    *  @return              The the read boolean value and new offset
+    */
+    function NextBool(bytes memory buff, uint256 offset) internal pure returns(bool, uint256) {
+        require(offset + 1 <= buff.length && offset < offset + 1, "Offset exceeds limit");
+        // byte === bytes1
+        bytes1 v;
+        assembly{
+            v := mload(add(add(buff, 0x20), offset))
+        }
+        bool value;
+        if (v == 0x01) {
+		    value = true;
+    	} else if (v == 0x00) {
+            value = false;
+        } else {
+            revert("NextBool value error");
+        }
+        return (value, offset + 1);
+    }
+
+    /* @notice              Read next byte starting at offset from buff
+    *  @param buff          Source bytes array
+    *  @param offset        The position from where we read the byte value
+    *  @return              The read byte value and new offset
+    */
+    function NextByte(bytes memory buff, uint256 offset) internal pure returns (bytes1, uint256) {
+        require(offset + 1 <= buff.length && offset < offset + 1, "NextByte, Offset exceeds maximum");
+        bytes1 v;
+        assembly{
+            v := mload(add(add(buff, 0x20), offset))
+        }
+        return (v, offset + 1);
+    }
+
+    /* @notice              Read next byte as uint8 starting at offset from buff
+    *  @param buff          Source bytes array
+    *  @param offset        The position from where we read the byte value
+    *  @return              The read uint8 value and new offset
+    */
+    function NextUint8(bytes memory buff, uint256 offset) internal pure returns (uint8, uint256) {
+        require(offset + 1 <= buff.length && offset < offset + 1, "NextUint8, Offset exceeds maximum");
+        uint8 v;
+        assembly{
+            let tmpbytes := mload(0x40)
+            let bvalue := mload(add(add(buff, 0x20), offset))
+            mstore8(tmpbytes, byte(0, bvalue))
+            mstore(0x40, add(tmpbytes, 0x01))
+            v := mload(sub(tmpbytes, 0x1f))
+        }
+        return (v, offset + 1);
+    }
+
+    /* @notice              Read next two bytes as uint16 type starting from offset
+    *  @param buff          Source bytes array
+    *  @param offset        The position from where we read the uint16 value
+    *  @return              The read uint16 value and updated offset
+    */
+    function NextUint16(bytes memory buff, uint256 offset) internal pure returns (uint16, uint256) {
+        require(offset + 2 <= buff.length && offset < offset + 2, "NextUint16, offset exceeds maximum");
+        
+        uint16 v;
+        assembly {
+            let tmpbytes := mload(0x40)
+            let bvalue := mload(add(add(buff, 0x20), offset))
+            mstore8(tmpbytes, byte(0x01, bvalue))
+            mstore8(add(tmpbytes, 0x01), byte(0, bvalue))
+            mstore(0x40, add(tmpbytes, 0x02))
+            v := mload(sub(tmpbytes, 0x1e))
+        }
+        return (v, offset + 2);
+    }
+
+
+    /* @notice              Read next four bytes as uint32 type starting from offset
+    *  @param buff          Source bytes array
+    *  @param offset        The position from where we read the uint32 value
+    *  @return              The read uint32 value and updated offset
+    */
+    function NextUint32(bytes memory buff, uint256 offset) internal pure returns (uint32, uint256) {
+        require(offset + 4 <= buff.length && offset < offset + 4, "NextUint32, offset exceeds maximum");
+        uint32 v;
+        assembly {
+            let tmpbytes := mload(0x40)
+            let byteLen := 0x04
+            for {
+                let tindex := 0x00
+                let bindex := sub(byteLen, 0x01)
+                let bvalue := mload(add(add(buff, 0x20), offset))
+            } lt(tindex, byteLen) {
+                tindex := add(tindex, 0x01)
+                bindex := sub(bindex, 0x01)
+            }{
+                mstore8(add(tmpbytes, tindex), byte(bindex, bvalue))
+            }
+            mstore(0x40, add(tmpbytes, byteLen))
+            v := mload(sub(tmpbytes, sub(0x20, byteLen)))
+        }
+        return (v, offset + 4);
+    }
+
+    /* @notice              Read next eight bytes as uint64 type starting from offset
+    *  @param buff          Source bytes array
+    *  @param offset        The position from where we read the uint64 value
+    *  @return              The read uint64 value and updated offset
+    */
+    function NextUint64(bytes memory buff, uint256 offset) internal pure returns (uint64, uint256) {
+        require(offset + 8 <= buff.length && offset < offset + 8, "NextUint64, offset exceeds maximum");
+        uint64 v;
+        assembly {
+            let tmpbytes := mload(0x40)
+            let byteLen := 0x08
+            for {
+                let tindex := 0x00
+                let bindex := sub(byteLen, 0x01)
+                let bvalue := mload(add(add(buff, 0x20), offset))
+            } lt(tindex, byteLen) {
+                tindex := add(tindex, 0x01)
+                bindex := sub(bindex, 0x01)
+            }{
+                mstore8(add(tmpbytes, tindex), byte(bindex, bvalue))
+            }
+            mstore(0x40, add(tmpbytes, byteLen))
+            v := mload(sub(tmpbytes, sub(0x20, byteLen)))
+        }
+        return (v, offset + 8);
+    }
+
+    /* @notice              Read next 32 bytes as uint256 type starting from offset,
+                            there are limits considering the numerical limits in multi-chain
+    *  @param buff          Source bytes array
+    *  @param offset        The position from where we read the uint256 value
+    *  @return              The read uint256 value and updated offset
+    */
+    function NextUint255(bytes memory buff, uint256 offset) internal pure returns (uint256, uint256) {
+        require(offset + 32 <= buff.length && offset < offset + 32, "NextUint255, offset exceeds maximum");
+        uint256 v;
+        assembly {
+            let tmpbytes := mload(0x40)
+            let byteLen := 0x20
+            for {
+                let tindex := 0x00
+                let bindex := sub(byteLen, 0x01)
+                let bvalue := mload(add(add(buff, 0x20), offset))
+            } lt(tindex, byteLen) {
+                tindex := add(tindex, 0x01)
+                bindex := sub(bindex, 0x01)
+            }{
+                mstore8(add(tmpbytes, tindex), byte(bindex, bvalue))
+            }
+            mstore(0x40, add(tmpbytes, byteLen))
+            v := mload(tmpbytes)
+        }
+        require(v <= 0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff, "Value exceeds the range");
+        return (v, offset + 32);
+    }
+    /* @notice              Read next variable bytes starting from offset,
+                            the decoding rule coming from multi-chain
+    *  @param buff          Source bytes array
+    *  @param offset        The position from where we read the bytes value
+    *  @return              The read variable bytes array value and updated offset
+    */
+    function NextVarBytes(bytes memory buff, uint256 offset) internal pure returns(bytes memory, uint256) {
+        uint len;
+        (len, offset) = NextVarUint(buff, offset);
+        require(offset + len <= buff.length && offset < offset + len, "NextVarBytes, offset exceeds maximum");
+        bytes memory tempBytes;
+        assembly{
+            switch iszero(len)
+            case 0 {
+                // Get a location of some free memory and store it in tempBytes as
+                // Solidity does for memory variables.
+                tempBytes := mload(0x40)
+
+                // The first word of the slice result is potentially a partial
+                // word read from the original array. To read it, we calculate
+                // the length of that partial word and start copying that many
+                // bytes into the array. The first word we copy will start with
+                // data we don't care about, but the last `lengthmod` bytes will
+                // land at the beginning of the contents of the new array. When
+                // we're done copying, we overwrite the full first word with
+                // the actual length of the slice.
+                let lengthmod := and(len, 31)
+
+                // The multiplication in the next line is necessary
+                // because when slicing multiples of 32 bytes (lengthmod == 0)
+                // the following copy loop was copying the origin's length
+                // and then ending prematurely not copying everything it should.
+                let mc := add(add(tempBytes, lengthmod), mul(0x20, iszero(lengthmod)))
+                let end := add(mc, len)
+
+                for {
+                    // The multiplication in the next line has the same exact purpose
+                    // as the one above.
+                    let cc := add(add(add(buff, lengthmod), mul(0x20, iszero(lengthmod))), offset)
+                } lt(mc, end) {
+                    mc := add(mc, 0x20)
+                    cc := add(cc, 0x20)
+                } {
+                    mstore(mc, mload(cc))
+                }
+
+                mstore(tempBytes, len)
+
+                //update free-memory pointer
+                //allocating the array padded to 32 bytes like the compiler does now
+                mstore(0x40, and(add(mc, 31), not(31)))
+            }
+            //if we want a zero-length slice let's just return a zero-length array
+            default {
+                tempBytes := mload(0x40)
+
+                mstore(0x40, add(tempBytes, 0x20))
+            }
+        }
+
+        return (tempBytes, offset + len);
+    }
+    /* @notice              Read next 32 bytes starting from offset,
+    *  @param buff          Source bytes array
+    *  @param offset        The position from where we read the bytes value
+    *  @return              The read bytes32 value and updated offset
+    */
+    function NextHash(bytes memory buff, uint256 offset) internal pure returns (bytes32 , uint256) {
+        require(offset + 32 <= buff.length && offset < offset + 32, "NextHash, offset exceeds maximum");
+        bytes32 v;
+        assembly {
+            v := mload(add(buff, add(offset, 0x20)))
+        }
+        return (v, offset + 32);
+    }
+
+    /* @notice              Read next 20 bytes starting from offset,
+    *  @param buff          Source bytes array
+    *  @param offset        The position from where we read the bytes value
+    *  @return              The read bytes20 value and updated offset
+    */
+    function NextBytes20(bytes memory buff, uint256 offset) internal pure returns (bytes20 , uint256) {
+        require(offset + 20 <= buff.length && offset < offset + 20, "NextBytes20, offset exceeds maximum");
+        bytes20 v;
+        assembly {
+            v := mload(add(buff, add(offset, 0x20)))
+        }
+        return (v, offset + 20);
+    }
+    
+    function NextVarUint(bytes memory buff, uint256 offset) internal pure returns(uint, uint256) {
+        bytes1 v;
+        (v, offset) = NextByte(buff, offset);
+
+        uint value;
+        if (v == 0xFD) {
+            // return NextUint16(buff, offset);
+            (value, offset) = NextUint16(buff, offset);
+            require(value >= 0xFD && value <= 0xFFFF, "NextUint16, value outside range");
+            return (value, offset);
+        } else if (v == 0xFE) {
+            // return NextUint32(buff, offset);
+            (value, offset) = NextUint32(buff, offset);
+            require(value > 0xFFFF && value <= 0xFFFFFFFF, "NextVarUint, value outside range");
+            return (value, offset);
+        } else if (v == 0xFF) {
+            // return NextUint64(buff, offset);
+            (value, offset) = NextUint64(buff, offset);
+            require(value > 0xFFFFFFFF, "NextVarUint, value outside range");
+            return (value, offset);
+        } else{
+            // return (uint8(v), offset);
+            value = uint8(v);
+            require(value < 0xFD, "NextVarUint, value outside range");
+            return (value, offset);
+        }
+    }
+}
+
+library SafeMath {
+    /**
+     * @dev Returns the addition of two unsigned integers, reverting on
+     * overflow.
+     *
+     * Counterpart to Solidity's `+` operator.
+     *
+     * Requirements:
+     * - Addition cannot overflow.
+     */
+    function add(uint256 a, uint256 b) internal pure returns (uint256) {
+        uint256 c = a + b;
+        require(c >= a, "SafeMath: addition overflow");
+
+        return c;
+    }
+
+    /**
+     * @dev Returns the subtraction of two unsigned integers, reverting on
+     * overflow (when the result is negative).
+     *
+     * Counterpart to Solidity's `-` operator.
+     *
+     * Requirements:
+     * - Subtraction cannot overflow.
+     */
+    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
+        return sub(a, b, "SafeMath: subtraction overflow");
+    }
+
+    /**
+     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
+     * overflow (when the result is negative).
+     *
+     * Counterpart to Solidity's `-` operator.
+     *
+     * Requirements:
+     * - Subtraction cannot overflow.
+     *
+     * _Available since v2.4.0._
+     */
+    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
+        require(b <= a, errorMessage);
+        uint256 c = a - b;
+
+        return c;
+    }
+
+    /**
+     * @dev Returns the multiplication of two unsigned integers, reverting on
+     * overflow.
+     *
+     * Counterpart to Solidity's `*` operator.
+     *
+     * Requirements:
+     * - Multiplication cannot overflow.
+     */
+    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
+        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
+        // benefit is lost if 'b' is also tested.
+        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
+        if (a == 0) {
+            return 0;
+        }
+
+        uint256 c = a * b;
+        require(c / a == b, "SafeMath: multiplication overflow");
+
+        return c;
+    }
+
+    /**
+     * @dev Returns the integer division of two unsigned integers. Reverts on
+     * division by zero. The result is rounded towards zero.
+     *
+     * Counterpart to Solidity's `/` operator. Note: this function uses a
+     * `revert` opcode (which leaves remaining gas untouched) while Solidity
+     * uses an invalid opcode to revert (consuming all remaining gas).
+     *
+     * Requirements:
+     * - The divisor cannot be zero.
+     */
+    function div(uint256 a, uint256 b) internal pure returns (uint256) {
+        return div(a, b, "SafeMath: division by zero");
+    }
+
+    /**
+     * @dev Returns the integer division of two unsigned integers. Reverts with custom message on
+     * division by zero. The result is rounded towards zero.
+     *
+     * Counterpart to Solidity's `/` operator. Note: this function uses a
+     * `revert` opcode (which leaves remaining gas untouched) while Solidity
+     * uses an invalid opcode to revert (consuming all remaining gas).
+     *
+     * Requirements:
+     * - The divisor cannot be zero.
+     *
+     * _Available since v2.4.0._
+     */
+    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
+        // Solidity only automatically asserts when dividing by 0
+        require(b != 0, errorMessage);
+        uint256 c = a / b;
+        // assert(a == b * c + a % b); // There is no case in which this doesn't hold
+
+        return c;
+    }
+
+    /**
+     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
+     * Reverts when dividing by zero.
+     *
+     * Counterpart to Solidity's `%` operator. This function uses a `revert`
+     * opcode (which leaves remaining gas untouched) while Solidity uses an
+     * invalid opcode to revert (consuming all remaining gas).
+     *
+     * Requirements:
+     * - The divisor cannot be zero.
+     */
+    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
+        return mod(a, b, "SafeMath: modulo by zero");
+    }
+
+    /**
+     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
+     * Reverts with custom message when dividing by zero.
+     *
+     * Counterpart to Solidity's `%` operator. This function uses a `revert`
+     * opcode (which leaves remaining gas untouched) while Solidity uses an
+     * invalid opcode to revert (consuming all remaining gas).
+     *
+     * Requirements:
+     * - The divisor cannot be zero.
+     *
+     * _Available since v2.4.0._
+     */
+    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
+        require(b != 0, errorMessage);
+        return a % b;
+    }
+}
+
+
+library Utils {
+
+    /* @notice      Convert the bytes array to bytes32 type, the bytes array length must be 32
+    *  @param _bs   Source bytes array
+    *  @return      bytes32
+    */
+    function bytesToBytes32(bytes memory _bs) internal pure returns (bytes32 value) {
+        require(_bs.length == 32, "bytes length is not 32.");
+        assembly {
+            // load 32 bytes from memory starting from position _bs + 0x20 since the first 0x20 bytes stores _bs length
+            value := mload(add(_bs, 0x20))
+        }
+    }
+
+    /* @notice      Convert bytes to uint256
+    *  @param _b    Source bytes should have length of 32
+    *  @return      uint256
+    */
+    function bytesToUint256(bytes memory _bs) internal pure returns (uint256 value) {
+        require(_bs.length == 32, "bytes length is not 32.");
+        assembly {
+            // load 32 bytes from memory starting from position _bs + 32
+            value := mload(add(_bs, 0x20))
+        }
+        require(value <= 0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff, "Value exceeds the range");
+    }
+
+    /* @notice      Convert uint256 to bytes
+    *  @param _b    uint256 that needs to be converted
+    *  @return      bytes
+    */
+    function uint256ToBytes(uint256 _value) internal pure returns (bytes memory bs) {
+        require(_value <= 0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff, "Value exceeds the range");
+        assembly {
+            // Get a location of some free memory and store it in result as
+            // Solidity does for memory variables.
+            bs := mload(0x40)
+            // Put 0x20 at the first word, the length of bytes for uint256 value
+            mstore(bs, 0x20)
+            //In the next word, put value in bytes format to the next 32 bytes
+            mstore(add(bs, 0x20), _value)
+            // Update the free-memory pointer by padding our last write location to 32 bytes
+            mstore(0x40, add(bs, 0x40))
+        }
+    }
+
+    /* @notice      Convert bytes to address
+    *  @param _bs   Source bytes: bytes length must be 20
+    *  @return      Converted address from source bytes
+    */
+    function bytesToAddress(bytes memory _bs) internal pure returns (address addr)
+    {
+        require(_bs.length == 20, "bytes length does not match address");
+        assembly {
+            // for _bs, first word store _bs.length, second word store _bs.value
+            // load 32 bytes from mem[_bs+20], convert it into Uint160, meaning we take last 20 bytes as addr (address).
+            addr := mload(add(_bs, 0x14))
+        }
+
+    }
+    
+    /* @notice      Convert address to bytes
+    *  @param _addr Address need to be converted
+    *  @return      Converted bytes from address
+    */
+    function addressToBytes(address _addr) internal pure returns (bytes memory bs){
+        assembly {
+            // Get a location of some free memory and store it in result as
+            // Solidity does for memory variables.
+            bs := mload(0x40)
+            // Put 20 (address byte length) at the first word, the length of bytes for uint256 value
+            mstore(bs, 0x14)
+            // logical shift left _a by 12 bytes, change _a from right-aligned to left-aligned
+            mstore(add(bs, 0x20), shl(96, _addr))
+            // Update the free-memory pointer by padding our last write location to 32 bytes
+            mstore(0x40, add(bs, 0x40))
+       }
+    }
+
+    /* @notice          Do hash leaf as the multi-chain does
+    *  @param _data     Data in bytes format
+    *  @return          Hashed value in bytes32 format
+    */
+    function hashLeaf(bytes memory _data) internal pure returns (bytes32 result)  {
+        result = sha256(abi.encodePacked(bytes1(0x0), _data));
+    }
+
+    /* @notice          Do hash children as the multi-chain does
+    *  @param _l        Left node
+    *  @param _r        Right node
+    *  @return          Hashed value in bytes32 format
+    */
+    function hashChildren(bytes32 _l, bytes32  _r) internal pure returns (bytes32 result)  {
+        result = sha256(abi.encodePacked(bytes1(0x01), _l, _r));
+    }
+
+    /* @notice              Compare if two bytes are equal, which are in storage and memory, seperately
+                            Refer from https://github.com/summa-tx/bitcoin-spv/blob/master/solidity/contracts/BytesLib.sol#L368
+    *  @param _preBytes     The bytes stored in storage
+    *  @param _postBytes    The bytes stored in memory
+    *  @return              Bool type indicating if they are equal
+    */
+    function equalStorage(bytes storage _preBytes, bytes memory _postBytes) internal view returns (bool) {
+        bool success = true;
+
+        assembly {
+            // we know _preBytes_offset is 0
+            let fslot := sload(_preBytes.slot)
+            // Arrays of 31 bytes or less have an even value in their slot,
+            // while longer arrays have an odd value. The actual length is
+            // the slot divided by two for odd values, and the lowest order
+            // byte divided by two for even values.
+            // If the slot is even, bitwise and the slot with 255 and divide by
+            // two to get the length. If the slot is odd, bitwise and the slot
+            // with -1 and divide by two.
+            let slength := div(and(fslot, sub(mul(0x100, iszero(and(fslot, 1))), 1)), 2)
+            let mlength := mload(_postBytes)
+
+            // if lengths don't match the arrays are not equal
+            switch eq(slength, mlength)
+            case 1 {
+                // fslot can contain both the length and contents of the array
+                // if slength < 32 bytes so let's prepare for that
+                // v. http://solidity.readthedocs.io/en/latest/miscellaneous.html#layout-of-state-variables-in-storage
+                // slength != 0
+                if iszero(iszero(slength)) {
+                    switch lt(slength, 32)
+                    case 1 {
+                        // blank the last byte which is the length
+                        fslot := mul(div(fslot, 0x100), 0x100)
+
+                        if iszero(eq(fslot, mload(add(_postBytes, 0x20)))) {
+                            // unsuccess:
+                            success := 0
+                        }
+                    }
+                    default {
+                        // cb is a circuit breaker in the for loop since there's
+                        //  no said feature for inline assembly loops
+                        // cb = 1 - don't breaker
+                        // cb = 0 - break
+                        let cb := 1
+
+                        // get the keccak hash to get the contents of the array
+                        mstore(0x0, _preBytes.slot)
+                        let sc := keccak256(0x0, 0x20)
+
+                        let mc := add(_postBytes, 0x20)
+                        let end := add(mc, mlength)
+
+                        // the next line is the loop condition:
+                        // while(uint(mc < end) + cb == 2)
+                        for {} eq(add(lt(mc, end), cb), 2) {
+                            sc := add(sc, 1)
+                            mc := add(mc, 0x20)
+                        } {
+                            if iszero(eq(sload(sc), mload(mc))) {
+                                // unsuccess:
+                                success := 0
+                                cb := 0
+                            }
+                        }
+                    }
+                }
+            }
+            default {
+                // unsuccess:
+                success := 0
+            }
+        }
+
+        return success;
+    }
+
+    /* @notice              Slice the _bytes from _start index till the result has length of _length
+                            Refer from https://github.com/summa-tx/bitcoin-spv/blob/master/solidity/contracts/BytesLib.sol#L246
+    *  @param _bytes        The original bytes needs to be sliced
+    *  @param _start        The index of _bytes for the start of sliced bytes
+    *  @param _length       The index of _bytes for the end of sliced bytes
+    *  @return              The sliced bytes
+    */
+    function slice(
+        bytes memory _bytes,
+        uint _start,
+        uint _length
+    )
+        internal
+        pure
+        returns (bytes memory)
+    {
+        require(_bytes.length >= (_start + _length));
+
+        bytes memory tempBytes;
+
+        assembly {
+            switch iszero(_length)
+            case 0 {
+                // Get a location of some free memory and store it in tempBytes as
+                // Solidity does for memory variables.
+                tempBytes := mload(0x40)
+
+                // The first word of the slice result is potentially a partial
+                // word read from the original array. To read it, we calculate
+                // the length of that partial word and start copying that many
+                // bytes into the array. The first word we copy will start with
+                // data we don't care about, but the last `lengthmod` bytes will
+                // land at the beginning of the contents of the new array. When
+                // we're done copying, we overwrite the full first word with
+                // the actual length of the slice.
+                // lengthmod <= _length % 32
+                let lengthmod := and(_length, 31)
+
+                // The multiplication in the next line is necessary
+                // because when slicing multiples of 32 bytes (lengthmod == 0)
+                // the following copy loop was copying the origin's length
+                // and then ending prematurely not copying everything it should.
+                let mc := add(add(tempBytes, lengthmod), mul(0x20, iszero(lengthmod)))
+                let end := add(mc, _length)
+
+                for {
+                    // The multiplication in the next line has the same exact purpose
+                    // as the one above.
+                    let cc := add(add(add(_bytes, lengthmod), mul(0x20, iszero(lengthmod))), _start)
+                } lt(mc, end) {
+                    mc := add(mc, 0x20)
+                    cc := add(cc, 0x20)
+                } {
+                    mstore(mc, mload(cc))
+                }
+
+                mstore(tempBytes, _length)
+
+                //update free-memory pointer
+                //allocating the array padded to 32 bytes like the compiler does now
+                mstore(0x40, and(add(mc, 31), not(31)))
+            }
+            //if we want a zero-length slice let's just return a zero-length array
+            default {
+                tempBytes := mload(0x40)
+
+                mstore(0x40, add(tempBytes, 0x20))
+            }
+        }
+
+        return tempBytes;
+    }
+    /* @notice              Check if the elements number of _signers within _keepers array is no less than _m
+    *  @param _keepers      The array consists of serveral address
+    *  @param _signers      Some specific addresses to be looked into
+    *  @param _m            The number requirement paramter
+    *  @return              True means containment, false meansdo do not contain.
+    */
+    function containMAddresses(address[] memory _keepers, address[] memory _signers, uint _m) internal pure returns (bool){
+        uint m = 0;
+        for(uint i = 0; i < _signers.length; i++){
+            for (uint j = 0; j < _keepers.length; j++) {
+                if (_signers[i] == _keepers[j]) {
+                    m++;
+                    delete _keepers[j];
+                }
+            }
+        }
+        return m >= _m;
+    }
+
+    /* @notice              TODO
+    *  @param key
+    *  @return
+    */
+    function compressMCPubKey(bytes memory key) internal pure returns (bytes memory newkey) {
+         require(key.length >= 67, "key lenggh is too short");
+         newkey = slice(key, 0, 35);
+         if (uint8(key[66]) % 2 == 0){
+             newkey[2] = bytes1(0x02);
+         } else {
+             newkey[2] = bytes1(0x03);
+         }
+         return newkey;
+    }
+    
+    /**
+     * @dev Returns true if `account` is a contract.
+     *      Refer from https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/Address.sol#L18
+     *
+     * This test is non-exhaustive, and there may be false-negatives: during the
+     * execution of a contract's constructor, its address will be reported as
+     * not containing a contract.
+     *
+     * IMPORTANT: It is unsafe to assume that an address for which this
+     * function returns false is an externally-owned account (EOA) and not a
+     * contract.
+     */
+    function isContract(address account) internal view returns (bool) {
+        // This method relies in extcodesize, which returns 0 for contracts in
+        // construction, since the code is only stored at the end of the
+        // constructor execution.
+
+        // According to EIP-1052, 0x0 is the value returned for not-yet created accounts
+        // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
+        // for accounts without code, i.e. `keccak256('')`
+        bytes32 codehash;
+        bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
+        // solhint-disable-next-line no-inline-assembly
+        assembly { codehash := extcodehash(account) }
+        return (codehash != 0x0 && codehash != accountHash);
+    }
+}
+
+library ECCUtils {
+    using SafeMath for uint256;
+    
+    struct Header {
+        uint32 version;
+        uint64 chainId;
+        uint32 timestamp;
+        uint32 height;
+        uint64 consensusData;
+        bytes32 prevBlockHash;
+        bytes32 transactionsRoot;
+        bytes32 crossStatesRoot;
+        bytes32 blockRoot;
+        bytes consensusPayload;
+        bytes20 nextBookkeeper;
+    }
+
+    struct ToMerkleValue {
+        bytes  txHash;  // cross chain txhash
+        uint64 fromChainID;
+        TxParam makeTxParam;
+    }
+
+    struct TxParam {
+        bytes txHash; //  source chain txhash
+        bytes crossChainId;
+        bytes fromContract;
+        uint64 toChainId;
+        bytes toContract;
+        bytes method;
+        bytes args;
+    }
+
+    uint constant POLYCHAIN_PUBKEY_LEN = 67;
+    uint constant POLYCHAIN_SIGNATURE_LEN = 65;
+
+    /* @notice                  Verify Poly chain transaction whether exist or not
+    *  @param _auditPath        Poly chain merkle proof
+    *  @param _root             Poly chain root
+    *  @return                  The verified value included in _auditPath
+    */
+    function merkleProve(bytes memory _auditPath, bytes32 _root) internal pure returns (bytes memory) {
+        uint256 off = 0;
+        bytes memory value;
+        (value, off)  = ZeroCopySource.NextVarBytes(_auditPath, off);
+
+        bytes32 hash = Utils.hashLeaf(value);
+        uint size = _auditPath.length.sub(off).div(33);
+        bytes32 nodeHash;
+        bytes1 pos;
+        for (uint i = 0; i < size; i++) {
+            (pos, off) = ZeroCopySource.NextByte(_auditPath, off);
+            (nodeHash, off) = ZeroCopySource.NextHash(_auditPath, off);
+            if (pos == 0x00) {
+                hash = Utils.hashChildren(nodeHash, hash);
+            } else if (pos == 0x01) {
+                hash = Utils.hashChildren(hash, nodeHash);
+            } else {
+                revert("merkleProve, NextByte for position info failed");
+            }
+        }
+        require(hash == _root, "merkleProve, expect root is not equal actual root");
+        return value;
+    }
+
+    /* @notice              calculate next book keeper according to public key list
+    *  @param _keyLen       consensus node number
+    *  @param _m            minimum signature number
+    *  @param _pubKeyList   consensus node public key list
+    *  @return              two element: next book keeper, consensus node signer addresses
+    */
+    function _getBookKeeper(uint _keyLen, uint _m, bytes memory _pubKeyList) internal pure returns (bytes20, address[] memory){
+         bytes memory buff;
+         buff = ZeroCopySink.WriteUint16(uint16(_keyLen));
+         address[] memory keepers = new address[](_keyLen);
+         bytes32 hash;
+         bytes memory publicKey;
+         for(uint i = 0; i < _keyLen; i++){
+             publicKey = Utils.slice(_pubKeyList, i*POLYCHAIN_PUBKEY_LEN, POLYCHAIN_PUBKEY_LEN);
+             buff =  abi.encodePacked(buff, ZeroCopySink.WriteVarBytes(Utils.compressMCPubKey(publicKey)));
+             hash = keccak256(Utils.slice(publicKey, 3, 64));
+             keepers[i] = address(uint160(uint256(hash)));
+         }
+
+         buff = abi.encodePacked(buff, ZeroCopySink.WriteUint16(uint16(_m)));
+         bytes20  nextBookKeeper = ripemd160(abi.encodePacked(sha256(buff)));
+         return (nextBookKeeper, keepers);
+    }
+
+    /* @notice              Verify public key derived from Poly chain
+    *  @param _pubKeyList   serialized consensus node public key list
+    *  @param _sigList      consensus node signature list
+    *  @return              return two element: next book keeper, consensus node signer addresses
+    */
+    function verifyPubkey(bytes memory _pubKeyList) internal pure returns (bytes20, address[] memory) {
+        require(_pubKeyList.length % POLYCHAIN_PUBKEY_LEN == 0, "_pubKeyList length illegal!");
+        uint n = _pubKeyList.length / POLYCHAIN_PUBKEY_LEN;
+        require(n >= 1, "too short _pubKeyList!");
+        return _getBookKeeper(n, n - (n - 1) / 3, _pubKeyList);
+    }
+
+    /* @notice              Verify Poly chain consensus node signature
+    *  @param _rawHeader    Poly chain block header raw bytes
+    *  @param _sigList      consensus node signature list
+    *  @param _keepers      addresses corresponding with Poly chain book keepers' public keys
+    *  @param _m            minimum signature number
+    *  @return              true or false
+    */
+    function verifySig(bytes memory _rawHeader, bytes memory _sigList, address[] memory _keepers, uint _m) internal pure returns (bool){
+        bytes32 hash = getHeaderHash(_rawHeader);
+
+        uint sigCount = _sigList.length.div(POLYCHAIN_SIGNATURE_LEN);
+        address[] memory signers = new address[](sigCount);
+        bytes32 r;
+        bytes32 s;
+        uint8 v;
+        for(uint j = 0; j  < sigCount; j++){
+            r = Utils.bytesToBytes32(Utils.slice(_sigList, j*POLYCHAIN_SIGNATURE_LEN, 32));
+            s =  Utils.bytesToBytes32(Utils.slice(_sigList, j*POLYCHAIN_SIGNATURE_LEN + 32, 32));
+            v =  uint8(_sigList[j*POLYCHAIN_SIGNATURE_LEN + 64]) + 27;
+            signers[j] =  ecrecover(sha256(abi.encodePacked(hash)), v, r, s);
+            if (signers[j] == address(0)) return false;
+        }
+        return Utils.containMAddresses(_keepers, signers, _m);
+    }
+    
+
+    /* @notice               Serialize Poly chain book keepers' info in Ethereum addresses format into raw bytes
+    *  @param keepersBytes   The serialized addresses
+    *  @return               serialized bytes result
+    */
+    function serializeKeepers(address[] memory keepers) internal pure returns (bytes memory) {
+        uint256 keeperLen = keepers.length;
+        bytes memory keepersBytes = ZeroCopySink.WriteUint64(uint64(keeperLen));
+        for(uint i = 0; i < keeperLen; i++) {
+            keepersBytes = abi.encodePacked(keepersBytes, ZeroCopySink.WriteVarBytes(Utils.addressToBytes(keepers[i])));
+        }
+        return keepersBytes;
+    }
+
+    /* @notice               Deserialize bytes into Ethereum addresses
+    *  @param keepersBytes   The serialized addresses derived from Poly chain book keepers in bytes format
+    *  @return               addresses
+    */
+    function deserializeKeepers(bytes memory keepersBytes) internal pure returns (address[] memory) {
+        uint256 off = 0;
+        uint64 keeperLen;
+        (keeperLen, off) = ZeroCopySource.NextUint64(keepersBytes, off);
+        address[] memory keepers = new address[](keeperLen);
+        bytes memory keeperBytes;
+        for(uint i = 0; i < keeperLen; i++) {
+            (keeperBytes, off) = ZeroCopySource.NextVarBytes(keepersBytes, off);
+            keepers[i] = Utils.bytesToAddress(keeperBytes);
+        }
+        return keepers;
+    }
+
+    /* @notice               Deserialize Poly chain transaction raw value
+    *  @param _valueBs       Poly chain transaction raw bytes
+    *  @return               ToMerkleValue struct
+    */
+    function deserializeMerkleValue(bytes memory _valueBs) internal pure returns (ToMerkleValue memory) {
+        ToMerkleValue memory toMerkleValue;
+        uint256 off = 0;
+
+        (toMerkleValue.txHash, off) = ZeroCopySource.NextVarBytes(_valueBs, off);
+
+        (toMerkleValue.fromChainID, off) = ZeroCopySource.NextUint64(_valueBs, off);
+
+        TxParam memory txParam;
+
+        (txParam.txHash, off) = ZeroCopySource.NextVarBytes(_valueBs, off);
+        
+        (txParam.crossChainId, off) = ZeroCopySource.NextVarBytes(_valueBs, off);
+
+        (txParam.fromContract, off) = ZeroCopySource.NextVarBytes(_valueBs, off);
+
+        (txParam.toChainId, off) = ZeroCopySource.NextUint64(_valueBs, off);
+
+        (txParam.toContract, off) = ZeroCopySource.NextVarBytes(_valueBs, off);
+
+        (txParam.method, off) = ZeroCopySource.NextVarBytes(_valueBs, off);
+
+        (txParam.args, off) = ZeroCopySource.NextVarBytes(_valueBs, off);
+        toMerkleValue.makeTxParam = txParam;
+
+        return toMerkleValue;
+    }
+
+    /* @notice            Deserialize Poly chain block header raw bytes
+    *  @param _valueBs    Poly chain block header raw bytes
+    *  @return            Header struct
+    */
+    function deserializeHeader(bytes memory _headerBs) internal pure returns (Header memory) {
+        Header memory header;
+        uint256 off = 0;
+        (header.version, off)  = ZeroCopySource.NextUint32(_headerBs, off);
+
+        (header.chainId, off) = ZeroCopySource.NextUint64(_headerBs, off);
+
+        (header.prevBlockHash, off) = ZeroCopySource.NextHash(_headerBs, off);
+
+        (header.transactionsRoot, off) = ZeroCopySource.NextHash(_headerBs, off);
+
+        (header.crossStatesRoot, off) = ZeroCopySource.NextHash(_headerBs, off);
+
+        (header.blockRoot, off) = ZeroCopySource.NextHash(_headerBs, off);
+
+        (header.timestamp, off) = ZeroCopySource.NextUint32(_headerBs, off);
+
+        (header.height, off) = ZeroCopySource.NextUint32(_headerBs, off);
+
+        (header.consensusData, off) = ZeroCopySource.NextUint64(_headerBs, off);
+
+        (header.consensusPayload, off) = ZeroCopySource.NextVarBytes(_headerBs, off);
+
+        (header.nextBookkeeper, off) = ZeroCopySource.NextBytes20(_headerBs, off);
+
+        return header;
+    }
+
+    /* @notice            Deserialize Poly chain block header raw bytes
+    *  @param rawHeader   Poly chain block header raw bytes
+    *  @return            header hash same as Poly chain
+    */
+    function getHeaderHash(bytes memory rawHeader) internal pure returns (bytes32) {
+        return sha256(abi.encodePacked(sha256(rawHeader)));
+    }
+}
+
+interface IEthCrossChainData {
+    function putCurEpochStartHeight(uint32 curEpochStartHeight) external returns (bool);
+    function getCurEpochStartHeight() external view returns (uint32);
+    function putCurEpochConPubKeyBytes(bytes calldata curEpochPkBytes) external returns (bool);
+    function getCurEpochConPubKeyBytes() external view returns (bytes memory);
+    function markFromChainTxExist(uint64 fromChainId, bytes32 fromChainTx) external returns (bool);
+    function checkIfFromChainTxExist(uint64 fromChainId, bytes32 fromChainTx) external view returns (bool);
+    function getEthTxHashIndex() external view returns (uint256);
+    function putEthTxHash(bytes32 ethTxHash) external returns (bool);
+    function putExtraData(bytes32 key1, bytes32 key2, bytes calldata value) external returns (bool);
+    function getExtraData(bytes32 key1, bytes32 key2) external view returns (bytes memory);
+    function transferOwnership(address newOwner) external;
+    function pause() external returns (bool);
+    function unpause() external returns (bool);
+    function paused() external view returns (bool);
+    // Not used currently by ECCM
+    function getEthTxHash(uint256 ethTxHashIndex) external view returns (bytes32);
+}
+
+interface IUpgradableECCM is IOwnable, IPausable {
+    function pause() external returns (bool);
+    function unpause() external returns (bool);
+    function upgradeToNew(address) external returns (bool);
+    function setChainId(uint64 _newChainId) external returns (bool);
+}
+
+
+interface IEthCrossChainManager {
+    function crossChain(uint64 _toChainId, bytes calldata _toContract, bytes calldata _method, bytes calldata _txData) external returns (bool);
+}
+
+contract UpgradableECCM is IUpgradableECCM, Ownable, Pausable {
+    address public EthCrossChainDataAddress;
+    uint64 public chainId;
+
+    constructor (address ethCrossChainDataAddr, uint64 _chainId) Pausable() Ownable() {
+        EthCrossChainDataAddress = ethCrossChainDataAddr;
+        chainId = _chainId;
+    }
+    function pause() onlyOwner public returns (bool) {
+        if (!paused()) {
+            _pause();
+        }
+        IEthCrossChainData eccd = IEthCrossChainData(EthCrossChainDataAddress);
+        if (!eccd.paused()) {
+            require(eccd.pause(), "pause EthCrossChainData contract failed");
+        }
+        return true;
+    }
+
+    function unpause() onlyOwner public returns (bool) {
+        if (paused()) {
+            _unpause();
+        }
+        IEthCrossChainData eccd = IEthCrossChainData(EthCrossChainDataAddress);
+        if (eccd.paused()) {
+            require(eccd.unpause(), "unpause EthCrossChainData contract failed");
+        }
+        return true;
+    }
+
+    // if we want to upgrade this contract, we need to invoke this method 
+    function upgradeToNew(address newEthCrossChainManagerAddress) whenPaused onlyOwner public returns (bool) {
+        IEthCrossChainData eccd = IEthCrossChainData(EthCrossChainDataAddress);
+        eccd.transferOwnership(newEthCrossChainManagerAddress);
+        return true;
+    }
+    
+    function setChainId(uint64 _newChainId) whenPaused onlyOwner public returns (bool) {
+        chainId = _newChainId;
+        return true;
+    }
+}
+
+contract EthCrossChainManager is IEthCrossChainManager, UpgradableECCM {
+    using SafeMath for uint256;
+    
+    address public whiteLister;
+    mapping(address => bool) public whiteListFromContract;
+    mapping(address => mapping(bytes => bool)) public whiteListContractMethodMap;
+
+    event InitGenesisBlockEvent(uint256 height, bytes rawHeader);
+    event ChangeBookKeeperEvent(uint256 height, bytes rawHeader);
+    event CrossChainEvent(address indexed sender, bytes txId, address proxyOrAssetContract, uint64 toChainId, bytes toContract, bytes rawdata);
+    event VerifyHeaderAndExecuteTxEvent(uint64 fromChainID, bytes toContract, bytes crossChainTxHash, bytes fromChainTxHash);
+    constructor(
+        address _eccd, 
+        uint64 _chainId, 
+        address[] memory fromContractWhiteList, 
+        bytes[] memory contractMethodWhiteList
+    ) UpgradableECCM(_eccd,_chainId)  {
+        whiteLister = msg.sender;
+        for (uint i=0;i<fromContractWhiteList.length;i++) {
+            whiteListFromContract[fromContractWhiteList[i]] = true;
+        }
+        for (uint i=0;i<contractMethodWhiteList.length;i++) {
+            (address toContract,bytes[] memory methods) = abi.decode(contractMethodWhiteList[i],(address,bytes[]));
+            for (uint j=0;j<methods.length;j++) {
+                whiteListContractMethodMap[toContract][methods[j]] = true;
+            }
+        }
+    }
+    
+    modifier onlyWhiteLister() {
+        require(msg.sender == whiteLister, "Not whiteLister");
+        _;
+    }
+
+    function setWhiteLister(address newWL) public onlyWhiteLister {
+        require(newWL!=address(0), "Can not transfer to address(0)");
+        whiteLister = newWL;
+    }
+    
+    function setFromContractWhiteList(address[] memory fromContractWhiteList) public onlyWhiteLister {
+        for (uint i=0;i<fromContractWhiteList.length;i++) {
+            whiteListFromContract[fromContractWhiteList[i]] = true;
+        }
+    }
+    
+    function removeFromContractWhiteList(address[] memory fromContractWhiteList) public onlyWhiteLister {
+        for (uint i=0;i<fromContractWhiteList.length;i++) {
+            whiteListFromContract[fromContractWhiteList[i]] = false;
+        }
+    }
+    
+    function setContractMethodWhiteList(bytes[] memory contractMethodWhiteList) public onlyWhiteLister {
+        for (uint i=0;i<contractMethodWhiteList.length;i++) {
+            (address toContract,bytes[] memory methods) = abi.decode(contractMethodWhiteList[i],(address,bytes[]));
+            for (uint j=0;j<methods.length;j++) {
+                whiteListContractMethodMap[toContract][methods[j]] = true;
+            }
+        }
+    }
+    
+    function removeContractMethodWhiteList(bytes[] memory contractMethodWhiteList) public onlyWhiteLister {
+        for (uint i=0;i<contractMethodWhiteList.length;i++) {
+            (address toContract,bytes[] memory methods) = abi.decode(contractMethodWhiteList[i],(address,bytes[]));
+            for (uint j=0;j<methods.length;j++) {
+                whiteListContractMethodMap[toContract][methods[j]] = false;
+            }
+        }
+    }
+
+    /* @notice              sync Poly chain genesis block header to smart contrat
+    *  @dev                 this function can only be called once, nextbookkeeper of rawHeader can't be empty
+    *  @param rawHeader     Poly chain genesis block raw header or raw Header including switching consensus peers info
+    *  @return              true or false
+    */
+    function initGenesisBlock(bytes memory rawHeader, bytes memory pubKeyList) whenNotPaused public returns(bool) {
+        // Load Ethereum cross chain data contract
+        IEthCrossChainData eccd = IEthCrossChainData(EthCrossChainDataAddress);
+        
+        // Make sure the contract has not been initialized before
+        require(eccd.getCurEpochConPubKeyBytes().length == 0, "EthCrossChainData contract has already been initialized!");
+        
+        // Parse header and convit the public keys into nextBookKeeper and compare it with header.nextBookKeeper to verify the validity of signature
+        ECCUtils.Header memory header = ECCUtils.deserializeHeader(rawHeader);
+        (bytes20 nextBookKeeper, address[] memory keepers) = ECCUtils.verifyPubkey(pubKeyList);
+        require(header.nextBookkeeper == nextBookKeeper, "NextBookers illegal");
+        
+        // Record current epoch start height and public keys (by storing them in address format)
+        require(eccd.putCurEpochStartHeight(header.height), "Save Poly chain current epoch start height to Data contract failed!");
+        require(eccd.putCurEpochConPubKeyBytes(ECCUtils.serializeKeepers(keepers)), "Save Poly chain current epoch book keepers to Data contract failed!");
+        
+        // Fire the event
+        emit InitGenesisBlockEvent(header.height, rawHeader);
+        return true;
+    }
+    
+    /* @notice              change Poly chain consensus book keeper
+    *  @param rawHeader     Poly chain change book keeper block raw header
+    *  @param pubKeyList    Poly chain consensus nodes public key list
+    *  @param sigList       Poly chain consensus nodes signature list
+    *  @return              true or false
+    */
+    function changeBookKeeper(bytes memory rawHeader, bytes memory pubKeyList, bytes memory sigList) whenNotPaused public returns(bool) {
+        // Load Ethereum cross chain data contract
+        ECCUtils.Header memory header = ECCUtils.deserializeHeader(rawHeader);
+        IEthCrossChainData eccd = IEthCrossChainData(EthCrossChainDataAddress);
+        
+        // Make sure rawHeader.height is higher than recorded current epoch start height
+        uint64 curEpochStartHeight = eccd.getCurEpochStartHeight();
+        require(header.height > curEpochStartHeight, "The height of header is lower than current epoch start height!");
+        
+        // Ensure the rawHeader is the key header including info of switching consensus peers by containing non-empty nextBookKeeper field
+        require(header.nextBookkeeper != bytes20(0), "The nextBookKeeper of header is empty");
+        
+        // Verify signature of rawHeader comes from pubKeyList
+        address[] memory polyChainBKs = ECCUtils.deserializeKeepers(eccd.getCurEpochConPubKeyBytes());
+        uint n = polyChainBKs.length;
+        require(ECCUtils.verifySig(rawHeader, sigList, polyChainBKs, n - (n - 1) / 3), "Verify signature failed!");
+        
+        // Convert pubKeyList into ethereum address format and make sure the compound address from the converted ethereum addresses
+        // equals passed in header.nextBooker
+        (bytes20 nextBookKeeper, address[] memory keepers) = ECCUtils.verifyPubkey(pubKeyList);
+        require(header.nextBookkeeper == nextBookKeeper, "NextBookers illegal");
+        
+        // update current epoch start height of Poly chain and current epoch consensus peers book keepers addresses
+        require(eccd.putCurEpochStartHeight(header.height), "Save MC LatestHeight to Data contract failed!");
+        require(eccd.putCurEpochConPubKeyBytes(ECCUtils.serializeKeepers(keepers)), "Save Poly chain book keepers bytes to Data contract failed!");
+        
+        // Fire the change book keeper event
+        emit ChangeBookKeeperEvent(header.height, rawHeader);
+        return true;
+    }
+
+
+    /* @notice              ERC20 token cross chain to other blockchain.
+    *                       this function push tx event to blockchain
+    *  @param toChainId     Target chain id
+    *  @param toContract    Target smart contract address in target block chain
+    *  @param txData        Transaction data for target chain, include to_address, amount
+    *  @return              true or false
+    */
+    function crossChain(uint64 toChainId, bytes calldata toContract, bytes calldata method, bytes calldata txData) whenNotPaused external returns (bool) {
+        // Only allow whitelist contract to call
+        require(whiteListFromContract[msg.sender],"Invalid from contract");
+        
+        // Load Ethereum cross chain data contract
+        IEthCrossChainData eccd = IEthCrossChainData(EthCrossChainDataAddress);
+        
+        // To help differentiate two txs, the ethTxHashIndex is increasing automatically
+        uint256 txHashIndex = eccd.getEthTxHashIndex();
+        
+        // Convert the uint256 into bytes
+        bytes memory paramTxHash = Utils.uint256ToBytes(txHashIndex);
+        
+        // Construct the makeTxParam, and put the hash info storage, to help provide proof of tx existence
+        bytes memory rawParam = abi.encodePacked(ZeroCopySink.WriteVarBytes(paramTxHash),
+            ZeroCopySink.WriteVarBytes(abi.encodePacked(sha256(abi.encodePacked(address(this), paramTxHash)))),
+            ZeroCopySink.WriteVarBytes(Utils.addressToBytes(msg.sender)),
+            ZeroCopySink.WriteUint64(toChainId),
+            ZeroCopySink.WriteVarBytes(toContract),
+            ZeroCopySink.WriteVarBytes(method),
+            ZeroCopySink.WriteVarBytes(txData)
+        );
+        
+        // Must save it in the storage to be included in the proof to be verified.
+        require(eccd.putEthTxHash(keccak256(rawParam)), "Save ethTxHash by index to Data contract failed!");
+        
+        // Fire the cross chain event denoting there is a cross chain request from Ethereum network to other public chains through Poly chain network
+        emit CrossChainEvent(tx.origin, paramTxHash, msg.sender, toChainId, toContract, rawParam);
+        return true;
+    }
+    /* @notice              Verify Poly chain header and proof, execute the cross chain tx from Poly chain to Ethereum
+    *  @param proof         Poly chain tx merkle proof
+    *  @param rawHeader     The header containing crossStateRoot to verify the above tx merkle proof
+    *  @param headerProof   The header merkle proof used to verify rawHeader
+    *  @param curRawHeader  Any header in current epoch consensus of Poly chain
+    *  @param headerSig     The coverted signature veriable for solidity derived from Poly chain consensus nodes' signature
+    *                       used to verify the validity of curRawHeader
+    *  @return              true or false
+    */
+    function verifyHeaderAndExecuteTx(bytes memory proof, bytes memory rawHeader, bytes memory headerProof, bytes memory curRawHeader,bytes memory headerSig) whenNotPaused public returns (bool){
+        ECCUtils.Header memory header = ECCUtils.deserializeHeader(rawHeader);
+        // Load ehereum cross chain data contract
+        IEthCrossChainData eccd = IEthCrossChainData(EthCrossChainDataAddress);
+        
+        // Get stored consensus public key bytes of current poly chain epoch and deserialize Poly chain consensus public key bytes to address[]
+        address[] memory polyChainBKs = ECCUtils.deserializeKeepers(eccd.getCurEpochConPubKeyBytes());
+
+        uint256 curEpochStartHeight = eccd.getCurEpochStartHeight();
+
+        uint n = polyChainBKs.length;
+        if (header.height >= curEpochStartHeight) {
+            // It's enough to verify rawHeader signature
+            require(ECCUtils.verifySig(rawHeader, headerSig, polyChainBKs, n - ( n - 1) / 3), "Verify poly chain header signature failed!");
+        } else {
+            // We need to verify the signature of curHeader 
+            require(ECCUtils.verifySig(curRawHeader, headerSig, polyChainBKs, n - ( n - 1) / 3), "Verify poly chain current epoch header signature failed!");
+
+            // Then use curHeader.StateRoot and headerProof to verify rawHeader.CrossStateRoot
+            ECCUtils.Header memory curHeader = ECCUtils.deserializeHeader(curRawHeader);
+            bytes memory proveValue = ECCUtils.merkleProve(headerProof, curHeader.blockRoot);
+            require(ECCUtils.getHeaderHash(rawHeader) == Utils.bytesToBytes32(proveValue), "verify header proof failed!");
+        }
+        
+        // Through rawHeader.CrossStatesRoot, the toMerkleValue or cross chain msg can be verified and parsed from proof
+        bytes memory toMerkleValueBs = ECCUtils.merkleProve(proof, header.crossStatesRoot);
+        
+        // Parse the toMerkleValue struct and make sure the tx has not been processed, then mark this tx as processed
+        ECCUtils.ToMerkleValue memory toMerkleValue = ECCUtils.deserializeMerkleValue(toMerkleValueBs);
+        require(!eccd.checkIfFromChainTxExist(toMerkleValue.fromChainID, Utils.bytesToBytes32(toMerkleValue.txHash)), "the transaction has been executed!");
+        require(eccd.markFromChainTxExist(toMerkleValue.fromChainID, Utils.bytesToBytes32(toMerkleValue.txHash)), "Save crosschain tx exist failed!");
+        
+        // Ethereum ChainId is 2, we need to check the transaction is for Ethereum network
+        require(toMerkleValue.makeTxParam.toChainId == chainId, "This Tx is not aiming at this network!");
+        
+        // Obtain the targeting contract, so that Ethereum cross chain manager contract can trigger the executation of cross chain tx on Ethereum side
+        address toContract = Utils.bytesToAddress(toMerkleValue.makeTxParam.toContract);
+        
+        // only invoke PreWhiteListed Contract and method For Now
+        require(whiteListContractMethodMap[toContract][toMerkleValue.makeTxParam.method],"Invalid to contract or method");
+
+        //TODO: check this part to make sure we commit the next line when doing local net UT test
+        require(_executeCrossChainTx(toContract, toMerkleValue.makeTxParam.method, toMerkleValue.makeTxParam.args, toMerkleValue.makeTxParam.fromContract, toMerkleValue.fromChainID), "Execute CrossChain Tx failed!");
+
+        // Fire the cross chain event denoting the executation of cross chain tx is successful,
+        // and this tx is coming from other public chains to current Ethereum network
+        emit VerifyHeaderAndExecuteTxEvent(toMerkleValue.fromChainID, toMerkleValue.makeTxParam.toContract, toMerkleValue.txHash, toMerkleValue.makeTxParam.txHash);
+
+        return true;
+    }
+    
+    /* @notice                  Dynamically invoke the targeting contract, and trigger executation of cross chain tx on Ethereum side
+    *  @param _toContract       The targeting contract that will be invoked by the Ethereum Cross Chain Manager contract
+    *  @param _method           At which method will be invoked within the targeting contract
+    *  @param _args             The parameter that will be passed into the targeting contract
+    *  @param _fromContractAddr From chain smart contract address
+    *  @param _fromChainId      Indicate from which chain current cross chain tx comes 
+    *  @return                  true or false
+    */
+    function _executeCrossChainTx(address _toContract, bytes memory _method, bytes memory _args, bytes memory _fromContractAddr, uint64 _fromChainId) internal returns (bool){
+        // Ensure the targeting contract gonna be invoked is indeed a contract rather than a normal account address
+        require(Utils.isContract(_toContract), "The passed in address is not a contract!");
+        bytes memory returnData;
+        bool success;
+        
+        // The returnData will be bytes32, the last byte must be 01;
+        (success, returnData) = _toContract.call(abi.encodePacked(bytes4(keccak256(abi.encodePacked(_method, "(bytes,bytes,uint64)"))), abi.encode(_args, _fromContractAddr, _fromChainId)));
+        
+        // Ensure the executation is successful
+        require(success == true, "EthCrossChain call business contract failed");
+        
+        // Ensure the returned value is true
+        require(returnData.length != 0, "No return value from business contract!");
+        (bool res,) = ZeroCopySource.NextBool(returnData, 31);
+        require(res == true, "EthCrossChain call business contract return is not true");
+        
+        return true;
+    }
+}
diff --git a/smart-contracts/contracts/periphery/ZilBridge/ccmExtendCrossChainManager.sol b/smart-contracts/contracts/periphery/ZilBridge/ccmExtendCrossChainManager.sol
new file mode 100644
index 0000000..260384f
--- /dev/null
+++ b/smart-contracts/contracts/periphery/ZilBridge/ccmExtendCrossChainManager.sol
@@ -0,0 +1,72 @@
+// SPDX-License-Identifier: MIT OR Apache-2.0
+pragma solidity 0.8.20;
+
+import { Utils, ZeroCopySink, IEthCrossChainManager, IUpgradableECCM,
+      UpgradableECCM, IEthCrossChainData, EthCrossChainManager } from "contracts/periphery/ZilBridge/ccmCrossChainManager.sol";
+import { Ownable } from "lib/openzeppelin-contracts/contracts/access/Ownable.sol";
+
+
+
+interface ILockProxy {
+  function addExtension(
+      bytes calldata _argsBz,
+      bytes calldata /* _fromContractAddr */,
+      uint64 _fromChainId
+                        ) external returns (bool);
+
+  function removeExtension(
+      bytes calldata _argsBz,
+      bytes calldata /* _fromContractAddr */,
+      uint64 _fromChainId
+                           ) external returns (bool);
+}
+
+// This is a contract which can replace the CCM. It allows the owner to register lock proxy extensions,
+// and forwards all other requests to the original cross chain manager.
+// see docs/zilbridge.md for details.
+// We can't implement IEthCrossChainManager, because we use the fallback for that.
+contract EthExtendCrossChainManager is EthCrossChainManager {
+  address public _extensionManager;
+  event ExtensionManagerTransferred(address indexed previousExtender, address indexed newExtender);
+
+  constructor(address _eccd,
+              uint64 _chainId,
+              address[] memory fromContractWhiteList,
+              bytes[] memory contractMethodWhiteList) EthCrossChainManager(_eccd, _chainId, fromContractWhiteList, contractMethodWhiteList)
+  {
+    _extensionManager = payable(msg.sender);
+    emit ExtensionManagerTransferred(address(0), _extensionManager);
+  }
+
+  function extensionManager() public view returns (address) { return _extensionManager; }
+
+  function isExtensionManager() public view returns (bool) {
+    return payable(msg.sender) == _extensionManager;
+  }
+
+  modifier onlyExtensionManager() {
+    require(isExtensionManager(), "CCM: Caller is not the extension manager");
+    _;
+  }
+
+  function transferExtensionManagement(address newManager) public onlyExtensionManager {
+    _transferExtensionManagement(newManager);
+  }
+
+  function renounceExtensionManagement() public onlyExtensionManager {
+    emit ExtensionManagerTransferred(_extensionManager, address(0));
+    _extensionManager = address(0);
+  }
+
+  function _transferExtensionManagement(address newManager) internal {
+    require(newManager != address(0), "ExtensionManager: new owner is 0 address");
+    emit ExtensionManagerTransferred(_extensionManager, newManager);
+    _extensionManager = newManager;
+  }
+
+  function forciblyAddExtension(address targetAddress, address addressToRegister, uint64 fromChainId) external onlyExtensionManager {
+    ILockProxy lockProxy = ILockProxy(targetAddress);
+    bytes memory payload = ZeroCopySink.WriteVarBytes(Utils.addressToBytes(addressToRegister));
+    lockProxy.addExtension(payload, payload, fromChainId);
+  }
+}
diff --git a/smart-contracts/script/bsc-testnet/bridgeTokens.s.sol b/smart-contracts/script/bsc-testnet/bridgeTokens.s.sol
index 245c5b5..e4ecc62 100644
--- a/smart-contracts/script/bsc-testnet/bridgeTokens.s.sol
+++ b/smart-contracts/script/bsc-testnet/bridgeTokens.s.sol
@@ -5,18 +5,19 @@ import {Script} from "forge-std/Script.sol";
 import {MintAndBurnTokenManagerUpgradeable} from "contracts/periphery/MintAndBurnTokenManagerUpgradeable.sol";
 import {ITokenManagerStructs} from "contracts/periphery/TokenManagerUpgradeable.sol";
 import {ERC20} from "@openzeppelin/contracts/token/ERC20/ERC20.sol";
+import { TestnetConfig } from "script/testnetConfig.s.sol";
 import "forge-std/console.sol";
 
-contract Transfer is Script {
+contract Transfer is Script,TestnetConfig {
     function run() external {
         uint256 deployerPrivateKey = vm.envUint("PRIVATE_KEY_TESTNET");
         address owner = vm.addr(deployerPrivateKey);
         console.log("Owner is %s", owner);
 
-        address tokenManagerAddress = 0xd10077bCE4A9D19068965dE519CED8a2fC1B096C;
-        address tokenAddress = 0x6d78c86D66DfE5Be5F55FBAA8B1d3FD28edfF396;
+        address tokenManagerAddress = bscMintAndBurnTokenManagerAddress;
+        address tokenAddress = bscTestTokenAddress;
 
-        uint remoteChainId = 33101;
+        uint remoteChainId = zqChainId;
         address remoteRecipient = owner;
         uint amount = 10;
 
diff --git a/smart-contracts/script/bsc-testnet/deployBridge.s.sol b/smart-contracts/script/bsc-testnet/deployBridge.s.sol
index 8a7fa63..4ac3755 100644
--- a/smart-contracts/script/bsc-testnet/deployBridge.s.sol
+++ b/smart-contracts/script/bsc-testnet/deployBridge.s.sol
@@ -8,6 +8,7 @@ import {MintAndBurnTokenManagerUpgradeable} from "contracts/periphery/MintAndBur
 import {ERC1967Proxy} from "@openzeppelin/contracts/proxy/ERC1967/ERC1967Proxy.sol";
 import {ChainGateway} from "contracts/core/ChainGateway.sol";
 import "forge-std/console.sol";
+import { TestnetConfig } from "script/testnetConfig.s.sol";
 
 contract Deployment is Script {
     function run() external {
@@ -31,6 +32,8 @@ contract Deployment is Script {
             validatorManager.isValidator(validators[0]),
             validatorManager.validatorsSize()
         );
+        console.log(
+            "    address public constant bscValidatorManagerAddress = %s", address(validatorManager));
 
         // Deploy Chain Gateway
         ChainGateway chainGateway = new ChainGateway{salt: "zilliqa"}(
@@ -42,6 +45,8 @@ contract Deployment is Script {
             address(chainGateway),
             address(chainGateway.validatorManager())
         );
+        console.log(
+            "    address public constant bscChainGatewayAddress = %s", address(chainGateway));
 
         // Deploy MintAndBurnTokenManager
         address implementation = address(
@@ -51,7 +56,6 @@ contract Deployment is Script {
             MintAndBurnTokenManagerUpgradeable.initialize,
             address(chainGateway)
         );
-
         address proxy = address(
             new ERC1967Proxy(implementation, initializeData)
         );
@@ -65,6 +69,9 @@ contract Deployment is Script {
             tokenManager.owner(),
             tokenManager.getGateway()
         );
+        console.log(
+            "    address public constant bscMintAndBurnTokenManagerAddress = %s", address(tokenManager));
+
 
         // Register TokenManager to ChainGateway
         chainGateway.register(proxy);
diff --git a/smart-contracts/script/bsc-testnet/deployBridgeToken.s.sol b/smart-contracts/script/bsc-testnet/deployBridgeToken.s.sol
index 0adde26..4b64a81 100644
--- a/smart-contracts/script/bsc-testnet/deployBridgeToken.s.sol
+++ b/smart-contracts/script/bsc-testnet/deployBridgeToken.s.sol
@@ -5,23 +5,24 @@ import {Script} from "forge-std/Script.sol";
 import {MintAndBurnTokenManagerUpgradeable} from "contracts/periphery/MintAndBurnTokenManagerUpgradeable.sol";
 import {ITokenManagerStructs} from "contracts/periphery/TokenManagerUpgradeable.sol";
 import {BridgedToken} from "contracts/periphery/BridgedToken.sol";
+import { TestnetConfig } from "script/testnetConfig.s.sol";
 import "forge-std/console.sol";
 
-contract Deployment is Script {
+contract Deployment is Script, TestnetConfig {
     function run() external {
         uint256 deployerPrivateKey = vm.envUint("PRIVATE_KEY_TESTNET");
         address owner = vm.addr(deployerPrivateKey);
         console.log("Owner is %s", owner);
 
-        address tokenManagerAddress = 0xA6D73210AF20a59832F264fbD991D2abf28401d0;
+        address tokenManagerAddress = bscMintAndBurnTokenManagerAddress;
 
         string memory tokenName = "test token";
         string memory tokenSymbol = "TST";
         uint8 tokenDecimals = 3;
 
-        address remoteToken = 0x8618d39a8276D931603c6Bc7306af6A53aD2F1F3;
-        address remoteTokenManager = 0x1509988c41f02014aA59d455c6a0D67b5b50f129;
-        uint remoteChainId = 33101;
+        address remoteToken = zqLegacyTestTokenAddress;
+        address remoteTokenManager = zqLockAndReleaseTokenManagerAddress;
+        uint remoteChainId = zqChainId;
 
         MintAndBurnTokenManagerUpgradeable tokenManager = MintAndBurnTokenManagerUpgradeable(
                 tokenManagerAddress
diff --git a/smart-contracts/script/bsc-testnet/deployCoreUpgradeable.s.sol b/smart-contracts/script/bsc-testnet/deployCoreUpgradeable.s.sol
index f8d5b14..e8541da 100644
--- a/smart-contracts/script/bsc-testnet/deployCoreUpgradeable.s.sol
+++ b/smart-contracts/script/bsc-testnet/deployCoreUpgradeable.s.sol
@@ -6,15 +6,16 @@ import {ValidatorManagerUpgradeable} from "contracts/core-upgradeable/ValidatorM
 import {ChainGatewayUpgradeable} from "contracts/core-upgradeable/ChainGatewayUpgradeable.sol";
 import {ERC1967Proxy} from "@openzeppelin/contracts/proxy/ERC1967/ERC1967Proxy.sol";
 import "forge-std/console.sol";
+import { TestnetConfig } from "script/testnetConfig.s.sol";
 
-contract Deployment is Script {
+contract Deployment is Script, TestnetConfig {
     function run() external {
         uint256 deployerPrivateKey = vm.envUint("PRIVATE_KEY_TESTNET");
         address owner = vm.addr(deployerPrivateKey);
         console.log("Owner is %s", owner);
 
         address[] memory validators = new address[](1);
-        address tokenManager = 0xA6D73210AF20a59832F264fbD991D2abf28401d0;
+        address tokenManager = bscMintAndBurnTokenManagerAddress;
         validators[0] = owner;
 
         vm.startBroadcast(deployerPrivateKey);
@@ -40,6 +41,8 @@ contract Deployment is Script {
             validatorManager.isValidator(validators[0]),
             validatorManager.validatorsSize()
         );
+        console.log(
+            "    address public constant bscValidatorManagerAddress = %s", address(validatorManager));
 
         // Deploy Chain Gateway
         address cgImplementation = address(
@@ -59,6 +62,8 @@ contract Deployment is Script {
             address(chainGateway),
             address(chainGateway.validatorManager())
         );
+        console.log(
+            "    address public constant bscChainGatewayAddress = %s", address(chainGateway));
 
         // Register TokenManager to ChainGateway
         chainGateway.register(tokenManager);
diff --git a/smart-contracts/script/bsc-testnet/deployMockZilBridge.s.sol b/smart-contracts/script/bsc-testnet/deployMockZilBridge.s.sol
new file mode 100644
index 0000000..69c7fcf
--- /dev/null
+++ b/smart-contracts/script/bsc-testnet/deployMockZilBridge.s.sol
@@ -0,0 +1,46 @@
+// SPDX-License-Identifier: MIT OR Apache-2.0
+pragma solidity ^0.8.20;
+
+import {Script} from "forge-std/Script.sol";
+import "forge-std/console.sol";
+import {Tester} from "test/Tester.sol";
+import {TestToken} from "test/Helpers.sol";
+import { LockProxy } from "test/zilbridge/infrastructure/lockProxy.sol";
+import { EthCrossChainManagerProxy } from "test/zilbridge/infrastructure/ccmProxy.sol";
+import { EthCrossChainManager } from "test/zilbridge/infrastructure/ccmCrossChainManager.sol";
+import { EthCrossChainData } from "test/zilbridge/infrastructure/ethCrossChainData.sol";
+import { EthExtendCrossChainManager } from "contracts/periphery/ZilBridge/ccmExtendCrossChainManager.sol";
+import { LockProxyTokenManagerUpgradeableV3 } from "contracts/periphery/TokenManagerV3/LockProxyTokenManagerUpgradeableV3.sol";
+import { LockProxyTokenManagerDeployer } from "test/zilbridge/TokenManagerDeployers/LockProxyTokenManagerDeployer.sol";
+import { TestnetConfig } from "script/testnetConfig.s.sol";
+
+/*** @notice does what ZilBridgeFixture::deployOriginalContracts() does */
+contract deployMockZilBridge is Script, TestnetConfig {
+  function run() external {
+    EthCrossChainManager ccm;
+    EthCrossChainManagerProxy ccmProxy;
+    EthCrossChainData eccd;
+    LockProxy lockProxy;
+
+    uint256 deployerPrivateKey = vm.envUint("PRIVATE_KEY_ZILBRIDGE");
+    address owner = vm.addr(deployerPrivateKey);
+    address[] memory a = new address[](0);
+    bytes[] memory b = new bytes[](0);
+    vm.startBroadcast(deployerPrivateKey);
+    console.log("Owner: %s", owner);
+    eccd = new EthCrossChainData();
+    console.log(
+        "    address public constant bscEthCrossChainDataAddress = %s", address(eccd));
+    ccm = new EthCrossChainManager(address(eccd), zbBscChainId, a, b);
+    console.log(
+        "    address public constant bscCCMAddress = %s", address(ccm));
+    ccmProxy = new EthCrossChainManagerProxy(address(ccm));
+    console.log(
+        "    address public constant bscCCMProxyAddress = %s", address(ccmProxy));
+    ccm.transferOwnership(address(ccmProxy));
+    eccd.transferOwnership(address(ccm));
+    lockProxy = new LockProxy(address(ccmProxy), zbZilliqaChainId);
+    console.log(
+        "      address public constant bscLockProxyAddress = %s", address(lockProxy));
+  }
+}
diff --git a/smart-contracts/script/bsc-testnet/deployXBridgeOverMockZilBridge.s.sol b/smart-contracts/script/bsc-testnet/deployXBridgeOverMockZilBridge.s.sol
new file mode 100644
index 0000000..4821b97
--- /dev/null
+++ b/smart-contracts/script/bsc-testnet/deployXBridgeOverMockZilBridge.s.sol
@@ -0,0 +1,39 @@
+// SPDX-License-Identifier: MIT OR Apache-2.0
+pragma solidity ^0.8.20;
+
+import {Script} from "forge-std/Script.sol";
+import "forge-std/console.sol";
+import {Tester} from "test/Tester.sol";
+import {TestToken} from "test/Helpers.sol";
+import { LockProxy } from "test/zilbridge/infrastructure/lockProxy.sol";
+import { EthCrossChainManagerProxy } from "test/zilbridge/infrastructure/ccmProxy.sol";
+import { EthCrossChainManager } from "test/zilbridge/infrastructure/ccmCrossChainManager.sol";
+import { EthCrossChainData } from "test/zilbridge/infrastructure/ethCrossChainData.sol";
+import { EthExtendCrossChainManager } from "contracts/periphery/ZilBridge/ccmExtendCrossChainManager.sol";
+import { LockProxyTokenManagerUpgradeableV3 } from "contracts/periphery/TokenManagerV3/LockProxyTokenManagerUpgradeableV3.sol";
+import { LockProxyTokenManagerDeployer } from "test/zilbridge/TokenManagerDeployers/LockProxyTokenManagerDeployer.sol";
+import { TestnetConfig } from "script/testnetConfig.s.sol";
+
+/*** @notice ZilBridgeFixture::installExtendCrossManager() */
+contract deployXBridgeOverMockZilBridge is Script, TestnetConfig {
+  // Plug in the data from deployMockZilBridge here.
+  EthCrossChainData public constant eccd = EthCrossChainData(bscEthCrossChainDataAddress);
+  EthCrossChainManager public constant ccm = EthCrossChainManager(bscCCMAddress);
+  EthCrossChainManagerProxy public constant ccmProxy = EthCrossChainManagerProxy(bscCCMProxyAddress);
+  LockProxy public constant lockProxy = LockProxy(payable(bscLockProxyAddress));
+  EthExtendCrossChainManager extendCCM;
+
+  function run() external {
+    address[] memory a = new address[](0);
+    bytes[] memory b = new bytes[](0);
+    uint256 deployerPrivateKey = vm.envUint("PRIVATE_KEY_ZILBRIDGE");
+    vm.startBroadcast(deployerPrivateKey);
+    extendCCM = new EthExtendCrossChainManager(address(eccd), 2, a, b);
+    ccmProxy.pauseEthCrossChainManager();
+    extendCCM.transferOwnership(address(ccmProxy));
+    ccmProxy.upgradeEthCrossChainManager(address(extendCCM));
+    ccmProxy.unpauseEthCrossChainManager();
+    console.log(
+        "    address public constant bscExtendCCMAddress = %s", address(extendCCM));
+  }
+}
diff --git a/smart-contracts/script/bsc-testnet/deployZilBridgeTokenManagers.s.sol b/smart-contracts/script/bsc-testnet/deployZilBridgeTokenManagers.s.sol
new file mode 100644
index 0000000..1d457b0
--- /dev/null
+++ b/smart-contracts/script/bsc-testnet/deployZilBridgeTokenManagers.s.sol
@@ -0,0 +1,53 @@
+// SPDX-License-Identifier: MIT OR Apache-2.0
+pragma solidity ^0.8.20;
+
+import {Script} from "forge-std/Script.sol";
+import "forge-std/console.sol";
+import {Tester} from "test/Tester.sol";
+import {TestToken} from "test/Helpers.sol";
+import { LockProxy } from "test/zilbridge/infrastructure/lockProxy.sol";
+import { TestingLockProxy } from "test/zilbridge/TestingLockProxy.sol";
+import { EthCrossChainManagerProxy } from "test/zilbridge/infrastructure/ccmProxy.sol";
+import { EthCrossChainManager } from "test/zilbridge/infrastructure/ccmCrossChainManager.sol";
+import { EthCrossChainData } from "test/zilbridge/infrastructure/ethCrossChainData.sol";
+import { EthExtendCrossChainManager } from "contracts/periphery/ZilBridge/ccmExtendCrossChainManager.sol";
+import { ChainGateway } from "contracts/core/ChainGateway.sol";
+import { LockProxyTokenManagerUpgradeableV3 } from "contracts/periphery/TokenManagerV3/LockProxyTokenManagerUpgradeableV3.sol";
+import { LockProxyTokenManagerDeployer } from "test/zilbridge/TokenManagerDeployers/LockProxyTokenManagerDeployer.sol";
+import {LockProxyTokenManagerUpgradeableV3} from "contracts/periphery/TokenManagerV3/LockProxyTokenManagerUpgradeableV3.sol";
+import {LockProxyTokenManagerDeployer} from "test/zilbridge/TokenManagerDeployers/LockProxyTokenManagerDeployer.sol";
+import {MintAndBurnTokenManagerDeployer} from "test/periphery/TokenManagerDeployers/MintAndBurnTokenManagerDeployer.sol";
+import {LockAndReleaseTokenManagerDeployer} from "test/periphery/TokenManagerDeployers/LockAndReleaseTokenManagerDeployer.sol";
+import { SwitcheoToken } from "test/zilbridge/tokens/switcheo/tokens/SwitcheoTokenETH.sol";
+import { TestnetConfig } from "script/testnetConfig.s.sol";
+
+/*** @notice Deploy token managers over the extension manager
+ */
+contract deployZilBridgeTokenManagers is Script, LockProxyTokenManagerDeployer, TestnetConfig {
+  EthExtendCrossChainManager constant extendCCM = EthExtendCrossChainManager(bscExtendCCMAddress);
+  ChainGateway constant chainGateway = ChainGateway(bscChainGatewayAddress);
+  LockProxy constant lockProxy = LockProxy(payable(bscLockProxyAddress));
+  // Different from 0.00025 so that we can tell the difference!
+  uint fees = 0.00007 ether;
+
+  // This has to be 18, because that is what the original (ZilBridge) contracts were
+  // deployed with. The mainnet value is 5.
+  uint64 constant COUNTERPART_CHAIN_ID = zbZilliqaChainId;
+
+  function run() external {
+    uint256 validatorPrivateKey = vm.envUint("PRIVATE_KEY_TESTNET");
+    uint256 bridgePrivateKey = vm.envUint("PRIVATE_KEY_ZILBRIDGE");
+    // token managers are apparently not pausable, so ..
+    vm.startBroadcast(validatorPrivateKey);
+    LockProxyTokenManagerUpgradeableV3 tokenManager = deployLatestLockProxyTokenManager(address(chainGateway), address(lockProxy), fees);
+    console.log(
+        "    address public constant bscLockProxyTokenManagerAddress =  %s", address(tokenManager));
+    vm.stopBroadcast();
+    vm.startBroadcast(bridgePrivateKey);
+    extendCCM.forciblyAddExtension(address(lockProxy), address(tokenManager), COUNTERPART_CHAIN_ID);
+    vm.stopBroadcast();
+    vm.startBroadcast(validatorPrivateKey);
+    chainGateway.register(address(tokenManager));
+    vm.stopBroadcast();
+  }
+}
diff --git a/smart-contracts/script/bsc-testnet/deployZilBridgeTokens.s.sol b/smart-contracts/script/bsc-testnet/deployZilBridgeTokens.s.sol
new file mode 100644
index 0000000..9fb2a78
--- /dev/null
+++ b/smart-contracts/script/bsc-testnet/deployZilBridgeTokens.s.sol
@@ -0,0 +1,50 @@
+// SPDX-License-Identifier: MIT OR Apache-2.0
+pragma solidity ^0.8.20;
+
+import {Script} from "forge-std/Script.sol";
+import {MintAndBurnTokenManagerUpgradeable} from "contracts/periphery/MintAndBurnTokenManagerUpgradeable.sol";
+import {ITokenManagerStructs} from "contracts/periphery/TokenManagerUpgradeable.sol";
+import {BridgedToken} from "contracts/periphery/BridgedToken.sol";
+import { ERC20 } from "openzeppelin-contracts/contracts/token/ERC20/ERC20.sol";
+import { SwitcheoToken } from "test/zilbridge/tokens/switcheo/tokens/SwitcheoTokenETH.sol";
+import "forge-std/console.sol";
+import { TestnetConfig } from "script/testnetConfig.s.sol";
+
+contract MyERC20 is ERC20 {
+constructor(string memory name_, string memory symbol_, uint256 supply_) ERC20(name_, symbol_) {
+    _mint(address(msg.sender), supply_);
+  }
+ function decimals() public pure override returns (uint8) {
+   return 3;
+ }
+}
+
+
+contract Deployment is Script, TestnetConfig {
+  function run() external {
+        uint256 deployerPrivateKey = vm.envUint("PRIVATE_KEY_TESTNET");
+        address owner = vm.addr(deployerPrivateKey);
+        console.log("Owner is %s", owner);
+
+        vm.startBroadcast(deployerPrivateKey);
+        // The other half of these tokens are deployed via the scilla-contracts/scripts/deploy.ts script.
+
+        // Native on BSC
+        uint256 totalSupply = 1_000_000_000;
+        string memory tokenName = "XTST_token";
+        string memory tokenSymbol = "XTST";
+        MyERC20 theContract = new MyERC20(tokenName, tokenSymbol, totalSupply);
+        console.log(
+            "    address public constant bscERC20Address = %s", address(theContract));
+
+        // Native on Zilliqa
+        SwitcheoToken bridgedFromZilliqa = new SwitcheoToken(bscLockProxyAddress, "Bridged ZTST", "eZTST", 3);
+        console.log(
+            "    address public constant bscBridgedZRC2Address = %s", address(bridgedFromZilliqa));
+
+        // Bridged ZIL - this is EVM ZIL, so scale = 18
+        SwitcheoToken bridgedZIL = new SwitcheoToken(bscLockProxyAddress, "eZIL", "Bridged ZIL", 18);
+        console.log(
+            "    address public constant bscBridgedZILAddress = %s", address(bridgedZIL));
+  }
+}
diff --git a/smart-contracts/script/bsc-testnet/pauseBridge.s.sol b/smart-contracts/script/bsc-testnet/pauseBridge.s.sol
index f448c33..bed91d3 100644
--- a/smart-contracts/script/bsc-testnet/pauseBridge.s.sol
+++ b/smart-contracts/script/bsc-testnet/pauseBridge.s.sol
@@ -3,18 +3,22 @@ pragma solidity ^0.8.20;
 
 import {Script} from "forge-std/Script.sol";
 import {MintAndBurnTokenManagerUpgradeableV3} from "contracts/periphery/TokenManagerV3/MintAndBurnTokenManagerUpgradeableV3.sol";
+import {LockProxyTokenManagerUpgradeableV3} from "contracts/periphery/TokenManagerV3/LockProxyTokenManagerUpgradeableV3.sol";
+import { TestnetConfig } from "script/testnetConfig.s.sol";
 import "forge-std/console.sol";
 
-contract Pause is Script {
+
+contract Pause is Script, TestnetConfig {
     function run() external {
         uint256 deployerPrivateKey = vm.envUint("PRIVATE_KEY_TESTNET");
         address owner = vm.addr(deployerPrivateKey);
         console.log("Deployer is %s", owner);
 
-        address tokenManagerAddress = 0xA6D73210AF20a59832F264fbD991D2abf28401d0;
+        address tokenManagerAddress = bscMintAndBurnTokenManagerAddress;
 
         vm.startBroadcast(deployerPrivateKey);
-        MintAndBurnTokenManagerUpgradeableV3 tokenManager = MintAndBurnTokenManagerUpgradeableV3(
+        {
+          MintAndBurnTokenManagerUpgradeableV3 tokenManager = MintAndBurnTokenManagerUpgradeableV3(
                 tokenManagerAddress
             );
         tokenManager.pause();
@@ -23,6 +27,18 @@ contract Pause is Script {
             tokenManagerAddress,
             tokenManager.paused()
         );
+        }
+        {
+          LockProxyTokenManagerUpgradeableV3 tokenManager = LockProxyTokenManagerUpgradeableV3(
+              bscLockProxyTokenManagerAddress
+            );
+          tokenManager.pause();
+          console.log(
+              "TokenManager %s, paused: %s",
+              tokenManagerAddress,
+              tokenManager.paused()
+                      );
+        }
         vm.stopBroadcast();
     }
 }
diff --git a/smart-contracts/script/bsc-testnet/setChainGatewayOnTokenManager.s.sol b/smart-contracts/script/bsc-testnet/setChainGatewayOnTokenManager.s.sol
index 2341657..3f446ab 100644
--- a/smart-contracts/script/bsc-testnet/setChainGatewayOnTokenManager.s.sol
+++ b/smart-contracts/script/bsc-testnet/setChainGatewayOnTokenManager.s.sol
@@ -3,16 +3,17 @@ pragma solidity ^0.8.20;
 
 import {Script} from "forge-std/Script.sol";
 import {MintAndBurnTokenManagerUpgradeableV3} from "contracts/periphery/TokenManagerV3/MintAndBurnTokenManagerUpgradeableV3.sol";
+import { TestnetConfig } from "script/testnetConfig.s.sol";
 import "forge-std/console.sol";
 
-contract Update is Script {
+contract Update is Script, TestnetConfig {
     function run() external {
         uint256 deployerPrivateKey = vm.envUint("PRIVATE_KEY_TESTNET");
         address owner = vm.addr(deployerPrivateKey);
         console.log("Deployer is %s", owner);
 
-        address newChainGateway = 0xa9A14C90e53EdCD89dFd201A3bF94D867f8098fE; // UPDATE;
-        address tokenManagerAddress = 0xA6D73210AF20a59832F264fbD991D2abf28401d0;
+        address newChainGateway = bscChainGatewayAddress;
+        address tokenManagerAddress = bscMintAndBurnTokenManagerAddress;
 
         vm.startBroadcast(deployerPrivateKey);
         MintAndBurnTokenManagerUpgradeableV3 tokenManager = MintAndBurnTokenManagerUpgradeableV3(
diff --git a/smart-contracts/script/bsc-testnet/setZilBridgeRouting.s.sol b/smart-contracts/script/bsc-testnet/setZilBridgeRouting.s.sol
new file mode 100644
index 0000000..e5d2d87
--- /dev/null
+++ b/smart-contracts/script/bsc-testnet/setZilBridgeRouting.s.sol
@@ -0,0 +1,58 @@
+// SPDX-License-Identifier: MIT OR Apache-2.0
+pragma solidity ^0.8.20;
+
+import {Script} from "forge-std/Script.sol";
+import {MintAndBurnTokenManagerUpgradeable} from "contracts/periphery/MintAndBurnTokenManagerUpgradeable.sol";
+import {ITokenManagerStructs} from "contracts/periphery/TokenManagerUpgradeable.sol";
+import {BridgedToken} from "contracts/periphery/BridgedToken.sol";
+import { ERC20 } from "openzeppelin-contracts/contracts/token/ERC20/ERC20.sol";
+import { SwitcheoToken } from "test/zilbridge/tokens/switcheo/tokens/SwitcheoTokenETH.sol";
+import "forge-std/console.sol";
+import {LockProxyTokenManagerUpgradeable} from "contracts/periphery/LockProxyTokenManagerUpgradeable.sol";
+import {LockAndReleaseTokenManagerUpgradeable} from "contracts/periphery/LockAndReleaseTokenManagerUpgradeable.sol";
+import { TestnetConfig } from "script/testnetConfig.s.sol";
+
+/*** @title Route tokens from the BSC side.
+ */
+contract Deployment is Script, TestnetConfig {
+  function run() external {
+        uint256 validatorPrivateKey = vm.envUint("PRIVATE_KEY_TESTNET");
+        address owner = vm.addr(validatorPrivateKey);
+        console.log("Owner is %s", owner);
+
+        vm.startBroadcast(validatorPrivateKey);
+        LockAndReleaseTokenManagerUpgradeable zilliqaTokenManager = LockAndReleaseTokenManagerUpgradeable(zqLockAndReleaseOrNativeTokenManagerAddress);
+        LockProxyTokenManagerUpgradeable bscTokenManager = LockProxyTokenManagerUpgradeable(bscLockProxyTokenManagerAddress);
+
+        // OK. Now set up the routing ..
+
+        // When bscERC20 arrives at bscTokenManager, send it to zilliqaBridgedERC20 on zilliqaTokenManager
+        ITokenManagerStructs.RemoteToken memory sourceBscERC20GasStruct = ITokenManagerStructs.RemoteToken({
+         token: address(zqBridgedERC20EVMAddress),
+         tokenManager: address(zilliqaTokenManager),
+         chainId: zqChainId});
+        bscTokenManager.registerToken(address(bscERC20Address), sourceBscERC20GasStruct);
+
+        // When bscBridgedZRC2FromZilliqa arrives at bscTokenManager, send it to zilliqaZRC2 on zilliqaTokenManager
+        ITokenManagerStructs.RemoteToken memory bridgedZRC2 = ITokenManagerStructs.RemoteToken({
+         token: address(zqZRC2EVMAddress),
+         tokenManager: address(zilliqaTokenManager),
+         chainId: zqChainId});
+        bscTokenManager.registerToken(address(bscBridgedZRC2Address), bridgedZRC2);
+
+        // When bscBridgedZIL arrives at bscTokenManager, send it to 0 on zilliqaTokenManager
+        ITokenManagerStructs.RemoteToken memory bridgedZIL = ITokenManagerStructs.RemoteToken({
+         token: address(0),
+         tokenManager: address(zilliqaTokenManager),
+         chainId: zqChainId});
+        bscTokenManager.registerToken(address(bscBridgedZILAddress), bridgedZIL);
+
+        // When BNB arrives at bscTokenManager, sent it to zilliqaBridgedBNB on zilliqaTokenManager
+        ITokenManagerStructs.RemoteToken memory bridgedBNB = ITokenManagerStructs.RemoteToken({
+         token: address(zqBridgedBNBEVMAddress),
+         tokenManager: address(zilliqaTokenManager),
+         chainId: zqChainId});
+        bscTokenManager.registerToken(address(0), bridgedBNB);
+  }
+}
+
diff --git a/smart-contracts/script/bsc-testnet/unpauseBridge.s.sol b/smart-contracts/script/bsc-testnet/unpauseBridge.s.sol
index 20d95a5..5403e35 100644
--- a/smart-contracts/script/bsc-testnet/unpauseBridge.s.sol
+++ b/smart-contracts/script/bsc-testnet/unpauseBridge.s.sol
@@ -3,26 +3,41 @@ pragma solidity ^0.8.20;
 
 import {Script} from "forge-std/Script.sol";
 import {MintAndBurnTokenManagerUpgradeableV3} from "contracts/periphery/TokenManagerV3/MintAndBurnTokenManagerUpgradeableV3.sol";
+import {LockProxyTokenManagerUpgradeableV3} from "contracts/periphery/TokenManagerV3/LockProxyTokenManagerUpgradeableV3.sol";
+import { TestnetConfig } from "script/testnetConfig.s.sol";
 import "forge-std/console.sol";
 
-contract Unpause is Script {
+contract Unpause is Script, TestnetConfig {
     function run() external {
         uint256 deployerPrivateKey = vm.envUint("PRIVATE_KEY_TESTNET");
         address owner = vm.addr(deployerPrivateKey);
         console.log("Deployer is %s", owner);
 
-        address tokenManagerAddress = 0xA6D73210AF20a59832F264fbD991D2abf28401d0;
+        address tokenManagerAddress = bscMintAndBurnTokenManagerAddress;
 
         vm.startBroadcast(deployerPrivateKey);
-        MintAndBurnTokenManagerUpgradeableV3 tokenManager = MintAndBurnTokenManagerUpgradeableV3(
+        {
+          MintAndBurnTokenManagerUpgradeableV3 tokenManager = MintAndBurnTokenManagerUpgradeableV3(
                 tokenManagerAddress
+                                                                                                   );
+          tokenManager.unpause();
+          console.log(
+              "TokenManager %s, paused: %s",
+              tokenManagerAddress,
+              tokenManager.paused()
+                      );
+        }
+        {
+          LockProxyTokenManagerUpgradeableV3 tokenManager = LockProxyTokenManagerUpgradeableV3(
+                bscLockProxyTokenManagerAddress
             );
-        tokenManager.unpause();
-        console.log(
-            "TokenManager %s, paused: %s",
-            tokenManagerAddress,
-            tokenManager.paused()
-        );
+          tokenManager.unpause();
+          console.log(
+              "TokenManager %s, paused: %s",
+              tokenManagerAddress,
+              tokenManager.paused()
+                      );
+        }
         vm.stopBroadcast();
     }
 }
diff --git a/smart-contracts/script/bsc-testnet/upgradeTokenManagerV2.s.sol b/smart-contracts/script/bsc-testnet/upgradeTokenManagerV2.s.sol
index d0f32f6..dc86626 100644
--- a/smart-contracts/script/bsc-testnet/upgradeTokenManagerV2.s.sol
+++ b/smart-contracts/script/bsc-testnet/upgradeTokenManagerV2.s.sol
@@ -4,16 +4,17 @@ pragma solidity ^0.8.20;
 import {Script} from "forge-std/Script.sol";
 import {TokenManagerUpgradeable} from "contracts/periphery/TokenManagerUpgradeable.sol";
 import {MintAndBurnTokenManagerUpgradeableV2} from "contracts/periphery/TokenManagerV2/MintAndBurnTokenManagerUpgradeableV2.sol";
+import { TestnetConfig } from "script/testnetConfig.s.sol";
 import "forge-std/console.sol";
 
-contract Upgrade is Script {
+contract Upgrade is Script, TestnetConfig {
     function run() external {
         uint256 deployerPrivateKey = vm.envUint("PRIVATE_KEY_TESTNET");
         address owner = vm.addr(deployerPrivateKey);
         console.log("Signer is %s", owner);
 
         // Constants
-        address tokenManagerAddress = 0xA6D73210AF20a59832F264fbD991D2abf28401d0;
+        address tokenManagerAddress = bscMintAndBurnTokenManagerAddress;
         uint fees = 0.00025 ether; // 0.00025 BNB
 
         TokenManagerUpgradeable tokenManager = TokenManagerUpgradeable(
diff --git a/smart-contracts/script/bsc-testnet/upgradeTokenManagerV3.s.sol b/smart-contracts/script/bsc-testnet/upgradeTokenManagerV3.s.sol
index af5a764..09a156c 100644
--- a/smart-contracts/script/bsc-testnet/upgradeTokenManagerV3.s.sol
+++ b/smart-contracts/script/bsc-testnet/upgradeTokenManagerV3.s.sol
@@ -4,16 +4,17 @@ pragma solidity ^0.8.20;
 import {Script} from "forge-std/Script.sol";
 import {TokenManagerUpgradeable} from "contracts/periphery/TokenManagerUpgradeable.sol";
 import {MintAndBurnTokenManagerUpgradeableV3} from "contracts/periphery/TokenManagerV3/MintAndBurnTokenManagerUpgradeableV3.sol";
+import { TestnetConfig } from "script/testnetConfig.s.sol";
 import "forge-std/console.sol";
 
-contract Upgrade is Script {
+contract Upgrade is Script, TestnetConfig {
     function run() external {
         uint256 deployerPrivateKey = vm.envUint("PRIVATE_KEY_TESTNET");
         address owner = vm.addr(deployerPrivateKey);
         console.log("Signer is %s", owner);
 
         // Constants
-        address tokenManagerAddress = 0xA6D73210AF20a59832F264fbD991D2abf28401d0;
+        address tokenManagerAddress = bscMintAndBurnTokenManagerAddress;
 
         TokenManagerUpgradeable tokenManager = TokenManagerUpgradeable(
             tokenManagerAddress
diff --git a/smart-contracts/script/bsc-testnet/zilBridgeTransferERC20.s.sol b/smart-contracts/script/bsc-testnet/zilBridgeTransferERC20.s.sol
new file mode 100644
index 0000000..caae2cf
--- /dev/null
+++ b/smart-contracts/script/bsc-testnet/zilBridgeTransferERC20.s.sol
@@ -0,0 +1,24 @@
+pragma solidity ^0.8.20;
+
+import {Script} from "forge-std/Script.sol";
+import {LockAndReleaseTokenManagerUpgradeable} from "contracts/periphery/LockAndReleaseTokenManagerUpgradeable.sol";
+import {ITokenManagerStructs} from "contracts/periphery/TokenManagerUpgradeable.sol";
+import {ERC20} from "@openzeppelin/contracts/token/ERC20/ERC20.sol";
+import { TestnetConfig } from "script/testnetConfig.s.sol";
+import "forge-std/console.sol";
+
+
+contract Deployment is Script, TestnetConfig {
+  function run() external {
+        uint256 validatorPrivateKey = vm.envUint("PRIVATE_KEY_TESTNET");
+        address validator = vm.addr(validatorPrivateKey);
+        address recipient = vm.envAddress("ZILBRIDGE_TEST_ADDRESS");
+        uint256 amount = vm.envUint("ZILBRIDGE_TEST_AMOUNT");
+        console.log("Owner is %s", validator);
+        vm.startBroadcast(validatorPrivateKey);
+        ERC20 theContract = ERC20(bscERC20Address);
+        // rrw's address for testing.
+        theContract.transfer( recipient, amount );
+  }
+
+}
diff --git a/smart-contracts/script/config.ts b/smart-contracts/script/config.ts
index 47e0337..93269ae 100644
--- a/smart-contracts/script/config.ts
+++ b/smart-contracts/script/config.ts
@@ -1,5 +1,7 @@
 import { parseUnits } from "ethers";
 
+// These turn out to be testnet addresses.
+
 export const config = {
   zq: {
     tokenManager: "0x6D61eFb60C17979816E4cE12CD5D29054E755948",
@@ -7,6 +9,7 @@ export const config = {
     token: "0x241c677D9969419800402521ae87C411897A029f",
     remoteToken: "0x351dA1E7500aBA1d168b9435DCE73415718d212F",
     remoteTokenManager: "0xF391A1Ee7b3ccad9a9451D2B7460Ac646F899f23",
+    remoteZilBridgeTokenManager: "0x103617938D41f7bea62F0B5b4E8e50585083048F",
     remoteChainId: 56,
     remoteRecipient: "0xb34b88220Fa1EAeDba5d50b271AF8c3eE14A24Dd",
     amount: parseUnits("1000000", 12),
@@ -18,6 +21,7 @@ export const config = {
     token: "0x351dA1E7500aBA1d168b9435DCE73415718d212F",
     remoteToken: "0x241c677D9969419800402521ae87C411897A029f",
     remoteTokenManager: "0x6D61eFb60C17979816E4cE12CD5D29054E755948",
+    remoteZilBridgeTokenManager: "",
     remoteChainId: 32769,
     remoteRecipient: "0xb34b88220Fa1EAeDba5d50b271AF8c3eE14A24Dd",
     amount: parseUnits("1000000", 12),
diff --git a/smart-contracts/script/testnetConfig.s.sol b/smart-contracts/script/testnetConfig.s.sol
new file mode 100644
index 0000000..dac53ac
--- /dev/null
+++ b/smart-contracts/script/testnetConfig.s.sol
@@ -0,0 +1,52 @@
+pragma solidity ^0.8.20;
+
+/*** @dev Inherit from this contract to get constants that tells you where other testnet contracts are.
+ * I did consider structuring this a bit more closely, but there is sufficient diversity between
+ * chains that I haven't,  yet.
+ */
+abstract contract TestnetConfig {
+  // bsc testnet
+  address public constant bscEthCrossChainDataAddress = 0xd77a160f954AbF8154f80EA53378ACa55bcAD548;
+
+  uint public constant bscChainId = 97;
+  // Can't be verified.
+  address public constant bscCCMAddress = 0x0EDb0830a5a28E60Bc28BCce3f4e1EC23b5E5783;
+  address public constant bscCCMProxyAddress = 0xE19738378c75cf2b3D704472bE81d7e036F4Ee04;
+  address public constant bscLockProxyAddress = 0x5B51e17837fc8F01b3C3ef29E882981e9414C159;
+  // Can't be verified.
+  address public constant bscExtendCCMAddress = 0x32ffa2C4c670A0fd0e94CF6457ac2FA7Ef007d55;
+  address public constant bscLockProxyTokenManagerAddress =  0x36b8A9cd6Bf9bfA5984093005cf81CAfB1Bf06F7;
+  // BSC zilbridge tokens.
+  address public constant bscERC20Address =  0xa1a47FA4D26137329BB08aC2E5F9a6C32D180fE3;
+  address public constant bscBridgedZRC2Address = 0x201eDd0521cF4B577399F789e22E05405D500163;
+  address public constant bscBridgedZILAddress = 0xfA3cF3BBa7f0fA1E8FECeE532512434A7d275d41;
+
+  /// Deployed by the original XBridge testnet deployment (prior to zilBridge)
+  address public constant bscChainGatewayAddress = 0xa9A14C90e53EdCD89dFd201A3bF94D867f8098fE;
+  address public constant bscMintAndBurnTokenManagerAddress = 0xd10077bCE4A9D19068965dE519CED8a2fC1B096C;
+  address public constant bscTestTokenAddress = 0x6d78c86D66DfE5Be5F55FBAA8B1d3FD28edfF396;
+
+  /// Zilliqa testnet
+
+  uint public constant zqChainId = 33101;
+  address public constant zqChainGatewayAddress = 0x7370e69565BB2313C4dA12F9062C282513919230;
+  address public constant zqLockAndReleaseTokenManagerAddress =  0x1509988c41f02014aA59d455c6a0D67b5b50f129;
+  address public constant zqLockAndReleaseOrNativeTokenManagerAddress = 0x41823941D00f47Ea1a98D75586915BF828F4a038;
+
+  // Scilla contracts.
+  address public constant zqBridgedERC20Address = address(0x009892a6E972B46Bca767ed552Fb06E25A35a49ebF);
+  address public constant zqBridgedBNBAddress = address(0x008fe819662a7Db7e03943877BA771E7A0902Ef96d);
+  address public constant zqZRC2Address = address(0x005dD38E64DA8F7d541d8af45fE00Bf37F6A2C6195);
+
+  // ERC20 fascias for Scilla contracts
+  address public constant zqBridgedERC20EVMAddress = 0x9Be4DCfB335A263c65a8A763d55710718bbdb416;
+  address public constant zqBridgedBNBEVMAddress = 0x40647A0C0024755Ef48Bc7C26a979ED833Eb6a15;
+  address public constant zqZRC2EVMAddress = 0xd3750B930ED52C26584C18B4f5eeAb986D7f3b36;
+
+  // Deployed back in the depths of time; recorded here so we can use them in scripts
+  address public constant zqLegacyTestTokenAddress = 0x63B6ebD476C84bFDd5DcaCB3f974794FC6C2e721;
+
+  /// ZilBridge constants that we use whilst testing the zilbridge/xbridge integration
+  uint64 public constant zbZilliqaChainId = 18;
+  uint64 public constant zbBscChainId = 6;
+}
diff --git a/smart-contracts/script/zq-testnet/bridgeTokens.s.sol b/smart-contracts/script/zq-testnet/bridgeTokens.s.sol
index 746b429..2051292 100644
--- a/smart-contracts/script/zq-testnet/bridgeTokens.s.sol
+++ b/smart-contracts/script/zq-testnet/bridgeTokens.s.sol
@@ -6,17 +6,18 @@ import {LockAndReleaseTokenManagerUpgradeable} from "contracts/periphery/LockAnd
 import {ITokenManagerStructs} from "contracts/periphery/TokenManagerUpgradeable.sol";
 import {ERC20} from "@openzeppelin/contracts/token/ERC20/ERC20.sol";
 import "forge-std/console.sol";
+import { TestnetConfig } from "script/testnetConfig.s.sol";
 
-contract Transfer is Script {
+contract Transfer is Script, TestnetConfig {
     function run() external {
         uint256 deployerPrivateKey = vm.envUint("PRIVATE_KEY_TESTNET");
         address owner = vm.addr(deployerPrivateKey);
         console.log("Owner is %s", owner);
 
-        address tokenManagerAddress = 0xd10077bCE4A9D19068965dE519CED8a2fC1B096C;
-        address tokenAddress = 0x63B6ebD476C84bFDd5DcaCB3f974794FC6C2e721;
+        address tokenManagerAddress = zqLockAndReleaseTokenManagerAddress;
+        address tokenAddress = zqLegacyTestTokenAddress;
 
-        uint remoteChainId = 97;
+        uint remoteChainId = bscChainId;
         address remoteRecipient = owner;
         uint amount = 10;
 
diff --git a/smart-contracts/script/zq-testnet/deployChainGateway.s.sol b/smart-contracts/script/zq-testnet/deployChainGateway.s.sol
index a93ed4f..8b32d8d 100644
--- a/smart-contracts/script/zq-testnet/deployChainGateway.s.sol
+++ b/smart-contracts/script/zq-testnet/deployChainGateway.s.sol
@@ -6,8 +6,9 @@ import {Relayer} from "contracts/core/Relayer.sol";
 import {ValidatorManager} from "contracts/core/ValidatorManager.sol";
 import {ChainGateway} from "contracts/core/ChainGateway.sol";
 import "forge-std/console.sol";
+import { TestnetConfig } from "script/testnetConfig.s.sol";
 
-contract Deployment is Script {
+contract Deployment is Script, TestnetConfig {
     function run() external {
         uint256 deployerPrivateKey = vm.envUint("PRIVATE_KEY_TESTNET");
         address owner = vm.addr(deployerPrivateKey);
@@ -40,6 +41,10 @@ contract Deployment is Script {
             address(chainGateway),
             address(chainGateway.validatorManager())
         );
+        console.log(
+            "    address public constant zqChainGatewayAddress = %s", address(chainGateway));
+        console.log(
+            "    address public constant zqValidatorManagerAddress = %s", address(chainGateway.validatorManager()));
 
         vm.stopBroadcast();
     }
diff --git a/smart-contracts/script/zq-testnet/deployCoreUpgradeable.s.sol b/smart-contracts/script/zq-testnet/deployCoreUpgradeable.s.sol
index ef641e7..260cb05 100644
--- a/smart-contracts/script/zq-testnet/deployCoreUpgradeable.s.sol
+++ b/smart-contracts/script/zq-testnet/deployCoreUpgradeable.s.sol
@@ -5,16 +5,17 @@ import {Script} from "forge-std/Script.sol";
 import {ValidatorManagerUpgradeable} from "contracts/core-upgradeable/ValidatorManagerUpgradeable.sol";
 import {ChainGatewayUpgradeable} from "contracts/core-upgradeable/ChainGatewayUpgradeable.sol";
 import {ERC1967Proxy} from "@openzeppelin/contracts/proxy/ERC1967/ERC1967Proxy.sol";
+import { TestnetConfig } from "script/testnetConfig.s.sol";
 import "forge-std/console.sol";
 
-contract Deployment is Script {
+contract Deployment is Script, TestnetConfig {
     function run() external {
         uint256 deployerPrivateKey = vm.envUint("PRIVATE_KEY_TESTNET");
         address owner = vm.addr(deployerPrivateKey);
         console.log("Owner is %s", owner);
 
         address[] memory validators = new address[](1);
-        address tokenManager = 0x1509988c41f02014aA59d455c6a0D67b5b50f129;
+        address tokenManager = zqLockAndReleaseTokenManagerAddress;
         validators[0] = owner;
 
         vm.startBroadcast(deployerPrivateKey);
@@ -38,6 +39,8 @@ contract Deployment is Script {
             validatorManager.isValidator(validators[0]),
             validatorManager.validatorsSize()
         );
+        console.log(
+            "    address public constant zqValidatorManagerAddress = %s", address(validatorManager));
 
         // Deploy Chain Gateway
         address cgImplementation = address(new ChainGatewayUpgradeable());
@@ -55,6 +58,8 @@ contract Deployment is Script {
             address(chainGateway),
             address(chainGateway.validatorManager())
         );
+        console.log(
+            "    address public constant zqChainGatewayAddress = %s", address(chainGateway));
 
         // Register TokenManager to ChainGateway
         chainGateway.register(tokenManager);
@@ -64,6 +69,8 @@ contract Deployment is Script {
             address(chainGateway),
             chainGateway.registered(tokenManager)
         );
+        console.log(
+            "    address public constant zqLockAndReleaseTokenManagerAddress = %s", address(tokenManager));
 
         vm.stopBroadcast();
     }
diff --git a/smart-contracts/script/zq-testnet/deployNativeTokenManagerV3.s.sol b/smart-contracts/script/zq-testnet/deployNativeTokenManagerV3.s.sol
new file mode 100644
index 0000000..24c4577
--- /dev/null
+++ b/smart-contracts/script/zq-testnet/deployNativeTokenManagerV3.s.sol
@@ -0,0 +1,42 @@
+// SPDX-License-Identifier: MIT OR Apache-2.0
+pragma solidity ^0.8.20;
+
+import {Script} from "forge-std/Script.sol";
+import {LockAndReleaseOrNativeTokenManagerUpgradeableV3} from "contracts/periphery/TokenManagerV3/LockAndReleaseOrNativeTokenManagerUpgradeableV3.sol";
+import {ERC1967Proxy} from "@openzeppelin/contracts/proxy/ERC1967/ERC1967Proxy.sol";
+import {ChainGateway} from "contracts/core/ChainGateway.sol";
+import {LockAndReleaseOrNativeTokenManagerDeployer} from "test/periphery/TokenManagerDeployers/LockAndReleaseOrNativeTokenManagerDeployer.sol";
+import { TestnetConfig } from "script/testnetConfig.s.sol";
+import "forge-std/console.sol";
+
+contract Deployment is Script, LockAndReleaseOrNativeTokenManagerDeployer,TestnetConfig {
+    function run() external {
+        uint256 deployerPrivateKey = vm.envUint("PRIVATE_KEY_TESTNET");
+        address chainGatewayAddress = zqChainGatewayAddress;
+        uint fees = 60 ether; // 60 ZIL
+
+        vm.startBroadcast(deployerPrivateKey);
+        LockAndReleaseOrNativeTokenManagerUpgradeableV3 tokenManager =
+            deployLatestLockAndReleaseOrNativeTokenManager(chainGatewayAddress, fees);
+        console.log(
+            "LockAndReleaseOrNativeTokenManager Proxy deployed to %s, with owner %s and gateway %s",
+            address(tokenManager),
+            tokenManager.owner(),
+            tokenManager.getGateway()
+        );
+        console.log(
+            "    address public constant zqLockAndReleaseOrNativeTokenManagerAddress = %s", address(tokenManager));
+
+        ChainGateway chainGateway = ChainGateway(chainGatewayAddress);
+        chainGateway.register(address(tokenManager));
+
+        console.log(
+            "TokenManager %s registered to %s ChainGateway: %s",
+            address(tokenManager),
+            address(chainGateway),
+            chainGateway.registered(address(tokenManager))
+        );
+
+        vm.stopBroadcast();
+    }
+}
diff --git a/smart-contracts/script/zq-testnet/deployTokenManager.s.sol b/smart-contracts/script/zq-testnet/deployTokenManager.s.sol
index 147b995..025b2c9 100644
--- a/smart-contracts/script/zq-testnet/deployTokenManager.s.sol
+++ b/smart-contracts/script/zq-testnet/deployTokenManager.s.sol
@@ -5,12 +5,14 @@ import {Script} from "forge-std/Script.sol";
 import {LockAndReleaseTokenManagerUpgradeable} from "contracts/periphery/LockAndReleaseTokenManagerUpgradeable.sol";
 import {ERC1967Proxy} from "@openzeppelin/contracts/proxy/ERC1967/ERC1967Proxy.sol";
 import {ChainGateway} from "contracts/core/ChainGateway.sol";
+import { TestnetConfig } from "script/testnetConfig.s.sol";
 import "forge-std/console.sol";
 
-contract Deployment is Script {
+
+contract Deployment is Script, TestnetConfig {
     function run() external {
         uint256 deployerPrivateKey = vm.envUint("PRIVATE_KEY_TESTNET");
-        address chainGatewayAddress = 0x10917A34FE60eE8364a401a6b1d3adaf80D84eb6;
+        address chainGatewayAddress = zqChainGatewayAddress;
 
         vm.startBroadcast(deployerPrivateKey);
 
@@ -37,6 +39,8 @@ contract Deployment is Script {
             tokenManager.owner(),
             tokenManager.getGateway()
         );
+        console.log(
+            "    address public constant zqLockAndReleaseTokenManagerAddress = %s", address(tokenManager));
 
         ChainGateway chainGateway = ChainGateway(chainGatewayAddress);
         chainGateway.register(proxy);
diff --git a/smart-contracts/script/zq-testnet/deployZRC2ERC20.s.sol b/smart-contracts/script/zq-testnet/deployZRC2ERC20.s.sol
new file mode 100644
index 0000000..350e61e
--- /dev/null
+++ b/smart-contracts/script/zq-testnet/deployZRC2ERC20.s.sol
@@ -0,0 +1,35 @@
+// SPDX-License-Identifier: MIT OR Apache-2.0
+pragma solidity ^0.8.20;
+
+import {Script} from "forge-std/Script.sol";
+import {LockAndReleaseTokenManagerUpgradeable} from "contracts/periphery/LockAndReleaseTokenManagerUpgradeable.sol";
+import {ERC1967Proxy} from "@openzeppelin/contracts/proxy/ERC1967/ERC1967Proxy.sol";
+import { ZRC2ProxyForZRC2 } from "test/zilbridge/tokens/zrc2erc20/ZRC2ProxyForZRC2.sol";
+import { TestnetConfig } from "script/testnetConfig.s.sol";
+import "forge-std/console.sol";
+
+/*** @title Deploy an ERC20 proxy for our ZRC2, so we can set routing with it.
+ */
+contract Deployment is Script, TestnetConfig {
+  function run() external {
+        uint256 validatorPrivateKey = vm.envUint("PRIVATE_KEY_TESTNET");
+        address validator = vm.addr(validatorPrivateKey);
+        console.log("Owner is %s", validator);
+        vm.startBroadcast(validatorPrivateKey);
+        {
+          ZRC2ProxyForZRC2 proxy = new ZRC2ProxyForZRC2(zqBridgedERC20Address);
+          console.log(
+              "    address public constant zqBridgedERC20EVMAddress = %s", address(proxy));
+        }
+        {
+          ZRC2ProxyForZRC2 proxy = new ZRC2ProxyForZRC2(zqBridgedBNBAddress);
+          console.log(
+              "    address public constant zqBridgedBNBEVMAddress = %s", address(proxy));
+        }
+        {
+          ZRC2ProxyForZRC2 proxy = new ZRC2ProxyForZRC2(zqZRC2Address);
+          console.log(
+              "    address public constant zqZRC2EVMAddress = %s", address(proxy));
+        }
+  }
+}
diff --git a/smart-contracts/script/zq-testnet/dispatchRelay.s.sol b/smart-contracts/script/zq-testnet/dispatchRelay.s.sol
index 4a07585..7351acb 100644
--- a/smart-contracts/script/zq-testnet/dispatchRelay.s.sol
+++ b/smart-contracts/script/zq-testnet/dispatchRelay.s.sol
@@ -5,8 +5,12 @@ import {MessageHashUtils} from "@openzeppelin/contracts/utils/cryptography/Messa
 import {Script} from "forge-std/Script.sol";
 import {ChainGateway} from "contracts/core/ChainGateway.sol";
 import {ValidatorManager} from "contracts/core/ValidatorManager.sol";
+import { TestnetConfig } from "script/testnetConfig.s.sol";
 
-contract Dispatch is Script {
+/*** @dev this script contains hardwired addresses - remember to hand-edit them to match the testnet config,
+ *   or it won't work!
+ */
+contract Dispatch is Script, TestnetConfig {
     using MessageHashUtils for bytes;
 
     function run() external {
diff --git a/smart-contracts/script/zq-testnet/pauseBridge.s.sol b/smart-contracts/script/zq-testnet/pauseBridge.s.sol
index 626dcfa..40895a2 100644
--- a/smart-contracts/script/zq-testnet/pauseBridge.s.sol
+++ b/smart-contracts/script/zq-testnet/pauseBridge.s.sol
@@ -3,26 +3,41 @@ pragma solidity ^0.8.20;
 
 import {Script} from "forge-std/Script.sol";
 import {LockAndReleaseTokenManagerUpgradeableV3} from "contracts/periphery/TokenManagerV3/LockAndReleaseTokenManagerUpgradeableV3.sol";
+import {LockAndReleaseOrNativeTokenManagerUpgradeableV3} from "contracts/periphery/TokenManagerV3/LockAndReleaseOrNativeTokenManagerUpgradeableV3.sol";
+import { TestnetConfig } from "script/testnetConfig.s.sol";
 import "forge-std/console.sol";
 
-contract Pause is Script {
+contract Pause is Script, TestnetConfig {
     function run() external {
         uint256 deployerPrivateKey = vm.envUint("PRIVATE_KEY_TESTNET");
         address owner = vm.addr(deployerPrivateKey);
         console.log("Deployer is %s", owner);
 
-        address tokenManagerAddress = 0x1509988c41f02014aA59d455c6a0D67b5b50f129;
+        address tokenManagerAddress = zqLockAndReleaseTokenManagerAddress;
 
         vm.startBroadcast(deployerPrivateKey);
-        LockAndReleaseTokenManagerUpgradeableV3 tokenManager = LockAndReleaseTokenManagerUpgradeableV3(
-                tokenManagerAddress
-            );
-        tokenManager.pause();
-        console.log(
-            "TokenManager %s, paused: %s",
-            tokenManagerAddress,
-            tokenManager.paused()
-        );
+        {
+          LockAndReleaseTokenManagerUpgradeableV3 tokenManager = LockAndReleaseTokenManagerUpgradeableV3(
+              tokenManagerAddress
+                                                                                                         );
+          tokenManager.pause();
+          console.log(
+              "TokenManager %s, paused: %s",
+              tokenManagerAddress,
+              tokenManager.paused()
+                      );
+        }
+        {
+                LockAndReleaseOrNativeTokenManagerUpgradeableV3 tokenManager = LockAndReleaseOrNativeTokenManagerUpgradeableV3(
+                    payable(zqLockAndReleaseOrNativeTokenManagerAddress)
+                                   );
+                tokenManager.pause();
+                console.log(
+                    "LockAndReleaseOrNativeTokenManager %s, paused: %s",
+                    zqLockAndReleaseOrNativeTokenManagerAddress,
+                    tokenManager.paused()
+                            );
+        }
         vm.stopBroadcast();
     }
 }
diff --git a/smart-contracts/script/zq-testnet/registerToken.s.sol b/smart-contracts/script/zq-testnet/registerToken.s.sol
index 10dbd14..9daea46 100644
--- a/smart-contracts/script/zq-testnet/registerToken.s.sol
+++ b/smart-contracts/script/zq-testnet/registerToken.s.sol
@@ -5,9 +5,12 @@ import {Script} from "forge-std/Script.sol";
 import {LockAndReleaseTokenManagerUpgradeable} from "contracts/periphery/LockAndReleaseTokenManagerUpgradeable.sol";
 import {ITokenManagerStructs} from "contracts/periphery/TokenManagerUpgradeable.sol";
 import {ERC20} from "@openzeppelin/contracts/token/ERC20/ERC20.sol";
+import { TestnetConfig } from "script/testnetConfig.s.sol";
 import "forge-std/console.sol";
 
-contract Deployment is Script {
+/*** @dev uses hardwired addresses; I've left these alone ..
+ */
+contract Deployment is Script, TestnetConfig {
     function run() external {
         uint256 deployerPrivateKey = vm.envUint("PRIVATE_KEY_TESTNET");
         address owner = vm.addr(deployerPrivateKey);
diff --git a/smart-contracts/script/zq-testnet/setChainGatewayOnTokenManager.s.sol b/smart-contracts/script/zq-testnet/setChainGatewayOnTokenManager.s.sol
index bbe8cae..67b284a 100644
--- a/smart-contracts/script/zq-testnet/setChainGatewayOnTokenManager.s.sol
+++ b/smart-contracts/script/zq-testnet/setChainGatewayOnTokenManager.s.sol
@@ -3,16 +3,19 @@ pragma solidity ^0.8.20;
 
 import {Script} from "forge-std/Script.sol";
 import {LockAndReleaseTokenManagerUpgradeableV3} from "contracts/periphery/TokenManagerV3/LockAndReleaseTokenManagerUpgradeableV3.sol";
+import {LockAndReleaseOrNativeTokenManagerUpgradeableV3} from "contracts/periphery/TokenManagerV3/LockAndReleaseOrNativeTokenManagerUpgradeableV3.sol";
+import { TestnetConfig } from "script/testnetConfig.s.sol";
 import "forge-std/console.sol";
 
-contract Update is Script {
+contract Update is TestnetConfig,Script {
     function run() external {
         uint256 deployerPrivateKey = vm.envUint("PRIVATE_KEY_TESTNET");
         address owner = vm.addr(deployerPrivateKey);
         console.log("Deployer is %s", owner);
 
-        address newChainGateway = 0x7370e69565BB2313C4dA12F9062C282513919230; // UPDATE;
-        address tokenManagerAddress = 0x1509988c41f02014aA59d455c6a0D67b5b50f129;
+        address newChainGateway = zqChainGatewayAddress;
+        address tokenManagerAddress = zqLockAndReleaseTokenManagerAddress;
+        address nativeTokenManagerAddress = zqLockAndReleaseOrNativeTokenManagerAddress;
 
         vm.startBroadcast(deployerPrivateKey);
         LockAndReleaseTokenManagerUpgradeableV3 tokenManager = LockAndReleaseTokenManagerUpgradeableV3(
@@ -20,10 +23,20 @@ contract Update is Script {
             );
         tokenManager.setGateway(newChainGateway);
         console.log(
-            "TokenManager %s, newChainGateway: %s",
+            "LockAndReleaseTokenManager %s, newChainGateway: %s",
             tokenManagerAddress,
             tokenManager.getGateway()
         );
+        LockAndReleaseOrNativeTokenManagerUpgradeableV3 nativeTokenManager = LockAndReleaseOrNativeTokenManagerUpgradeableV3(
+            payable(nativeTokenManagerAddress)
+            );
+        nativeTokenManager.setGateway(newChainGateway);
+        console.log(
+            "NativeLockAndReleaseTokenManager %s, newChainGateway: %s",
+            nativeTokenManagerAddress,
+            nativeTokenManager.getGateway()
+        );
+
         vm.stopBroadcast();
     }
 }
diff --git a/smart-contracts/script/zq-testnet/setZilBridgeRouting.s.sol b/smart-contracts/script/zq-testnet/setZilBridgeRouting.s.sol
new file mode 100644
index 0000000..9afd027
--- /dev/null
+++ b/smart-contracts/script/zq-testnet/setZilBridgeRouting.s.sol
@@ -0,0 +1,57 @@
+// SPDX-License-Identifier: MIT OR Apache-2.0
+pragma solidity ^0.8.20;
+
+import {Script} from "forge-std/Script.sol";
+import {MintAndBurnTokenManagerUpgradeable} from "contracts/periphery/MintAndBurnTokenManagerUpgradeable.sol";
+import {ITokenManagerStructs} from "contracts/periphery/TokenManagerUpgradeable.sol";
+import {BridgedToken} from "contracts/periphery/BridgedToken.sol";
+import { ERC20 } from "openzeppelin-contracts/contracts/token/ERC20/ERC20.sol";
+import { SwitcheoToken } from "test/zilbridge/tokens/switcheo/tokens/SwitcheoTokenETH.sol";
+import "forge-std/console.sol";
+import {LockProxyTokenManagerUpgradeable} from "contracts/periphery/LockProxyTokenManagerUpgradeable.sol";
+import {LockAndReleaseTokenManagerUpgradeable} from "contracts/periphery/LockAndReleaseTokenManagerUpgradeable.sol";
+import { TestnetConfig } from "script/testnetConfig.s.sol";
+
+/*** @title Route tokens from the BSC side.
+ */
+contract Deployment is Script, TestnetConfig {
+  function run() external {
+        uint256 validatorPrivateKey = vm.envUint("PRIVATE_KEY_TESTNET");
+        address validator = vm.addr(validatorPrivateKey);
+        console.log("Owner is %s", validator);
+
+        vm.startBroadcast(validatorPrivateKey);
+        LockAndReleaseTokenManagerUpgradeable zilliqaTokenManager = LockAndReleaseTokenManagerUpgradeable(address(zqLockAndReleaseOrNativeTokenManagerAddress));
+
+        // OK. Now set up the routing ..
+
+        // When zilliqaBridgedERC20 arrives at zilliqaTokenManager, send it to bscERC20 on bscTokenManager
+        ITokenManagerStructs.RemoteToken memory sourceBscERC20GasStruct = ITokenManagerStructs.RemoteToken({
+         token: address(bscERC20Address),
+         tokenManager: address(bscLockProxyTokenManagerAddress),
+         chainId: bscChainId});
+        zilliqaTokenManager.registerToken(address(zqBridgedERC20EVMAddress), sourceBscERC20GasStruct);
+
+        // When zilliqaZRC2 arrives at zilliqaTokenManager, send it to bscBridgedZRC2FromZilliqa on bscTokenManager
+        ITokenManagerStructs.RemoteToken memory bridgedZRC2 = ITokenManagerStructs.RemoteToken({
+         token: address(bscBridgedZRC2Address),
+         tokenManager: address(bscLockProxyTokenManagerAddress),
+         chainId: bscChainId});
+        zilliqaTokenManager.registerToken(address(zqZRC2EVMAddress), bridgedZRC2);
+
+        // When ZIL arrives at zilliqaTokenManager, send it to bscBridgedZIL on bscTokenManager
+        ITokenManagerStructs.RemoteToken memory bridgedZIL = ITokenManagerStructs.RemoteToken({
+         token: address(bscBridgedZILAddress),
+         tokenManager: address(bscLockProxyTokenManagerAddress),
+         chainId: bscChainId});
+        zilliqaTokenManager.registerToken(address(0), bridgedZIL);
+
+        // When zilliqaBridgedBNB arrives at zilliqaTokenManager, send it to 0 on bscTokenManager
+        ITokenManagerStructs.RemoteToken memory bridgedBNB = ITokenManagerStructs.RemoteToken({
+         token: address(0),
+         tokenManager: address(bscLockProxyTokenManagerAddress),
+         chainId: bscChainId});
+        zilliqaTokenManager.registerToken(address(zqBridgedBNBEVMAddress), bridgedBNB);
+  }
+}
+
diff --git a/smart-contracts/script/zq-testnet/unpauseBridge.s.sol b/smart-contracts/script/zq-testnet/unpauseBridge.s.sol
index 7f4c3e0..9ee21f2 100644
--- a/smart-contracts/script/zq-testnet/unpauseBridge.s.sol
+++ b/smart-contracts/script/zq-testnet/unpauseBridge.s.sol
@@ -3,26 +3,40 @@ pragma solidity ^0.8.20;
 
 import {Script} from "forge-std/Script.sol";
 import {LockAndReleaseTokenManagerUpgradeableV3} from "contracts/periphery/TokenManagerV3/LockAndReleaseTokenManagerUpgradeableV3.sol";
+import { TestnetConfig } from "script/testnetConfig.s.sol";
 import "forge-std/console.sol";
 
-contract Unpause is Script {
+contract Unpause is Script, TestnetConfig {
     function run() external {
         uint256 deployerPrivateKey = vm.envUint("PRIVATE_KEY_TESTNET");
         address owner = vm.addr(deployerPrivateKey);
         console.log("Deployer is %s", owner);
 
-        address tokenManagerAddress = 0x1509988c41f02014aA59d455c6a0D67b5b50f129;
+        address tokenManagerAddress = zqLockAndReleaseTokenManagerAddress;
 
         vm.startBroadcast(deployerPrivateKey);
-        LockAndReleaseTokenManagerUpgradeableV3 tokenManager = LockAndReleaseTokenManagerUpgradeableV3(
+        {
+          LockAndReleaseTokenManagerUpgradeableV3 tokenManager = LockAndReleaseTokenManagerUpgradeableV3(
                 tokenManagerAddress
-            );
-        tokenManager.unpause();
-        console.log(
-            "TokenManager %s, paused: %s",
-            tokenManagerAddress,
-            tokenManager.paused()
-        );
+                                                                                                         );
+          tokenManager.unpause();
+          console.log(
+              "TokenManager %s, paused: %s",
+              tokenManagerAddress,
+              tokenManager.paused()
+                      );
+        }
+        {
+          LockAndReleaseTokenManagerUpgradeableV3 tokenManager = LockAndReleaseTokenManagerUpgradeableV3(
+              zqLockAndReleaseOrNativeTokenManagerAddress
+                                                                                                         );
+          tokenManager.unpause();
+          console.log(
+              "TokenManager %s, paused: %s",
+              address(tokenManager),
+              tokenManager.paused()
+                      );
+        }
         vm.stopBroadcast();
     }
 }
diff --git a/smart-contracts/script/zq-testnet/upgradeTokenManagerV2.s.sol b/smart-contracts/script/zq-testnet/upgradeTokenManagerV2.s.sol
index 11756de..e80ac05 100644
--- a/smart-contracts/script/zq-testnet/upgradeTokenManagerV2.s.sol
+++ b/smart-contracts/script/zq-testnet/upgradeTokenManagerV2.s.sol
@@ -4,16 +4,17 @@ pragma solidity ^0.8.20;
 import {Script} from "forge-std/Script.sol";
 import {TokenManagerUpgradeable} from "contracts/periphery/TokenManagerUpgradeable.sol";
 import {LockAndReleaseTokenManagerUpgradeableV2} from "contracts/periphery/TokenManagerV2/LockAndReleaseTokenManagerUpgradeableV2.sol";
+import { TestnetConfig } from "script/testnetConfig.s.sol";
 import "forge-std/console.sol";
 
-contract Upgrade is Script {
+contract Upgrade is Script, TestnetConfig {
     function run() external {
         uint256 deployerPrivateKey = vm.envUint("PRIVATE_KEY_TESTNET");
         address owner = vm.addr(deployerPrivateKey);
         console.log("Signer is %s", owner);
 
         // Constants
-        address tokenManagerAddress = 0x1509988c41f02014aA59d455c6a0D67b5b50f129;
+        address tokenManagerAddress = zqLockAndReleaseTokenManagerAddress;
         uint fees = 60 ether; // 60 ZIL
 
         TokenManagerUpgradeable tokenManager = TokenManagerUpgradeable(
diff --git a/smart-contracts/script/zq-testnet/upgradeTokenManagerV3.s.sol b/smart-contracts/script/zq-testnet/upgradeTokenManagerV3.s.sol
index 1a1bc76..6a96f8e 100644
--- a/smart-contracts/script/zq-testnet/upgradeTokenManagerV3.s.sol
+++ b/smart-contracts/script/zq-testnet/upgradeTokenManagerV3.s.sol
@@ -4,16 +4,17 @@ pragma solidity ^0.8.20;
 import {Script} from "forge-std/Script.sol";
 import {TokenManagerUpgradeable} from "contracts/periphery/TokenManagerUpgradeable.sol";
 import {LockAndReleaseTokenManagerUpgradeableV3} from "contracts/periphery/TokenManagerV3/LockAndReleaseTokenManagerUpgradeableV3.sol";
+import { TestnetConfig } from "script/testnetConfig.s.sol";
 import "forge-std/console.sol";
 
-contract Upgrade is Script {
+contract Upgrade is Script,TestnetConfig {
     function run() external {
         uint256 deployerPrivateKey = vm.envUint("PRIVATE_KEY_TESTNET");
         address owner = vm.addr(deployerPrivateKey);
         console.log("Signer is %s", owner);
 
         // Constants
-        address tokenManagerAddress = 0x1509988c41f02014aA59d455c6a0D67b5b50f129;
+        address tokenManagerAddress = zqLockAndReleaseTokenManagerAddress;
 
         TokenManagerUpgradeable tokenManager = TokenManagerUpgradeable(
             tokenManagerAddress
diff --git a/smart-contracts/script/zq-testnet/zilBridgeDebug.s.sol b/smart-contracts/script/zq-testnet/zilBridgeDebug.s.sol
new file mode 100644
index 0000000..aedde88
--- /dev/null
+++ b/smart-contracts/script/zq-testnet/zilBridgeDebug.s.sol
@@ -0,0 +1,39 @@
+pragma solidity ^0.8.20;
+
+import {Script} from "forge-std/Script.sol";
+import {LockAndReleaseTokenManagerUpgradeable} from "contracts/periphery/LockAndReleaseTokenManagerUpgradeable.sol";
+import {LockAndReleaseOrNativeTokenManagerUpgradeableV3} from "contracts/periphery/TokenManagerV3/LockAndReleaseOrNativeTokenManagerUpgradeableV3.sol";
+import {ITokenManagerStructs, ITokenManager} from "contracts/periphery/TokenManagerUpgradeable.sol";
+import {ERC20} from "@openzeppelin/contracts/token/ERC20/ERC20.sol";
+import {ZRC2ProxyForZRC2} from "test/zilbridge/tokens/zrc2erc20/ZRC2ProxyForZRC2.sol";
+import "forge-std/console.sol";
+import { TestnetConfig } from "script/testnetConfig.s.sol";
+import {IERC20} from "contracts/periphery/LockAndReleaseTokenManagerUpgradeable.sol";
+import {IRelayer, Relayer, CallMetadata} from "contracts/core/Relayer.sol";
+import {Registry} from "contracts/core/Registry.sol";
+import {ChainGateway} from "contracts/core/ChainGateway.sol";
+
+contract Deployment is Script, TestnetConfig {
+  function run() external {
+    //        uint256 validatorPrivateKey = vm.envUint("PRIVATE_KEY_ZILBRIDGE");
+    uint256 validatorPrivateKey = vm.envUint("PRIVATE_KEY_TESTNET");
+
+        address validator = vm.addr(validatorPrivateKey);
+        vm.startBroadcast(validatorPrivateKey);
+        console.log("I am %s", validator);
+        console.log("Token manager at %s", zqLockAndReleaseOrNativeTokenManagerAddress);
+        console.log("ChainGateway %s", zqChainGatewayAddress);
+        ChainGateway chainGateway = ChainGateway(zqChainGatewayAddress);
+        chainGateway.register(address(zqLockAndReleaseOrNativeTokenManagerAddress));
+        console.log(
+            "TokenManager %s registered to %s ChainGateway: %s",
+            address(zqLockAndReleaseOrNativeTokenManagerAddress),
+            address(chainGateway),
+            chainGateway.registered(address(zqLockAndReleaseOrNativeTokenManagerAddress))
+        );
+
+        Relayer relayer = Relayer(zqChainGatewayAddress);
+        bool amRegistered = relayer.registered(zqLockAndReleaseOrNativeTokenManagerAddress);
+        console.log("isRegistered %d", amRegistered);
+  }
+}
diff --git a/smart-contracts/script/zq-testnet/zilBridgeTransferERC20.s.sol b/smart-contracts/script/zq-testnet/zilBridgeTransferERC20.s.sol
new file mode 100644
index 0000000..af1c391
--- /dev/null
+++ b/smart-contracts/script/zq-testnet/zilBridgeTransferERC20.s.sol
@@ -0,0 +1,22 @@
+pragma solidity ^0.8.20;
+
+import {Script} from "forge-std/Script.sol";
+import {LockAndReleaseTokenManagerUpgradeable} from "contracts/periphery/LockAndReleaseTokenManagerUpgradeable.sol";
+import {ITokenManagerStructs} from "contracts/periphery/TokenManagerUpgradeable.sol";
+import {ERC20} from "@openzeppelin/contracts/token/ERC20/ERC20.sol";
+import { TestnetConfig } from "script/testnetConfig.s.sol";
+import "forge-std/console.sol";
+
+contract Deployment is Script, TestnetConfig {
+  function run() external {
+        uint256 validatorPrivateKey = vm.envUint("PRIVATE_KEY_ZILBRIDGE");
+        address validator = vm.addr(validatorPrivateKey);
+        address recipient = vm.envAddress("ZILBRIDGE_TEST_ADDRESS");
+        uint256 amount = vm.envUint("ZILBRIDGE_TEST_AMOUNT");
+        console.log("Owner is %s", validator);
+        vm.startBroadcast(validatorPrivateKey);
+        ERC20 theContract = ERC20(zqZRC2EVMAddress);
+        theContract.transfer( recipient, amount );
+  }
+
+}
diff --git a/smart-contracts/test/periphery/TokenBridge.native.t.sol b/smart-contracts/test/periphery/TokenBridge.native.t.sol
new file mode 100644
index 0000000..8f29ca7
--- /dev/null
+++ b/smart-contracts/test/periphery/TokenBridge.native.t.sol
@@ -0,0 +1,225 @@
+// SPDX-License-Identifier: MIT OR Apache-2.0
+pragma solidity 0.8.20;
+
+import {Tester, Vm} from "test/Tester.sol";
+import {ITokenManagerStructs, TokenManagerUpgradeable} from "contracts/periphery/TokenManagerUpgradeable.sol";
+import {LockAndReleaseOrNativeTokenManagerUpgradeableV3} from "contracts/periphery/TokenManagerV3/LockAndReleaseOrNativeTokenManagerUpgradeableV3.sol";
+import {MintAndBurnTokenManagerUpgradeableV3} from "contracts/periphery/TokenManagerV3/MintAndBurnTokenManagerUpgradeableV3.sol";
+import {BridgedToken} from "contracts/periphery/BridgedToken.sol";
+import {CallMetadata, IRelayerEvents} from "contracts/core/Relayer.sol";
+import {ValidatorManager} from "contracts/core/ValidatorManager.sol";
+import {ChainGateway} from "contracts/core/ChainGateway.sol";
+import {MessageHashUtils} from "@openzeppelin/contracts/utils/cryptography/MessageHashUtils.sol";
+import {TestToken} from "test/Helpers.sol";
+import {LockAndReleaseOrNativeTokenManagerDeployer} from "test/periphery/TokenManagerDeployers/LockAndReleaseOrNativeTokenManagerDeployer.sol";
+import {MintAndBurnTokenManagerDeployer} from "test/periphery/TokenManagerDeployers/MintAndBurnTokenManagerDeployer.sol";
+
+// Integration Tests combining the TokenManagers and ChainGateway
+contract TokenBridgeNativeTests is
+    Tester,
+    IRelayerEvents,
+    LockAndReleaseOrNativeTokenManagerDeployer,
+    MintAndBurnTokenManagerDeployer
+{
+    using MessageHashUtils for bytes;
+
+    // Gateway shared between the two chains
+    Vm.Wallet validatorWallet = vm.createWallet(1);
+    address validator = validatorWallet.addr;
+    address[] validators = [validator];
+    address sourceUser = vm.addr(2);
+    address remoteUser = vm.addr(3);
+    uint originalTokenSupply = 1000 ether;
+    uint fees = 0.1 ether;
+
+    LockAndReleaseOrNativeTokenManagerUpgradeableV3 sourceTokenManager;
+    TestToken originalToken;
+    ChainGateway sourceChainGateway;
+    ValidatorManager sourceValidatorManager;
+
+    MintAndBurnTokenManagerUpgradeableV3 remoteTokenManager;
+    BridgedToken bridgedToken;
+    ChainGateway remoteChainGateway;
+    ValidatorManager remoteValidatorManager;
+
+    function setUp() external {
+        vm.startPrank(validator);
+        // Deploy Source Infra
+        sourceValidatorManager = new ValidatorManager(validator);
+        sourceValidatorManager.initialize(validators);
+        sourceChainGateway = new ChainGateway(
+            address(sourceValidatorManager),
+            validator
+        );
+
+        // Deploy Target Infra
+        remoteValidatorManager = new ValidatorManager(validator);
+        remoteValidatorManager.initialize(validators);
+        remoteChainGateway = new ChainGateway(
+            address(remoteValidatorManager),
+            validator
+        );
+
+        // Deploy LockAndReleaseTokenManagerUpgradeable
+        sourceTokenManager = deployLatestLockAndReleaseOrNativeTokenManager(
+            address(sourceChainGateway),
+            fees
+        );
+
+        // Deploy MintAndBurnTokenManagerUpgradeable
+        remoteTokenManager = deployLatestMintAndBurnTokenManager(
+            address(remoteChainGateway),
+            fees
+        );
+
+        // Register contracts to chaingateway
+        sourceChainGateway.register(address(sourceTokenManager));
+        remoteChainGateway.register(address(remoteTokenManager));
+
+        // Deploy bridged ERC20
+        bridgedToken = remoteTokenManager.deployToken(
+            "GASZ",
+            "Zilliqa GAS",
+            address(0),
+            address(sourceTokenManager),
+            block.chainid
+        );
+
+        ITokenManagerStructs.RemoteToken
+            memory remoteToken = ITokenManagerStructs.RemoteToken({
+                token: address(bridgedToken),
+                tokenManager: address(remoteTokenManager),
+                chainId: block.chainid
+            });
+
+        // Register bridged token with original token
+        sourceTokenManager.registerToken(address(0), remoteToken);
+
+        vm.stopPrank();
+    }
+
+    function test_happyPath() external {
+      /* Give the source user some gas to play with. Redundant, as it
+       * happens, since foundry will make them have all the gas in the
+       * world anyway, but I feel better including it.
+       */
+      uint amount = originalTokenSupply;
+      vm.deal(sourceUser, amount);
+      startHoax(sourceUser);
+      uint sourceChainId = block.chainid;
+      uint remoteChainId = block.chainid;
+      uint sourceUserOriginalBalance = sourceUser.balance;
+      assertGe(sourceUser.balance, amount);
+
+      bytes memory data = abi.encodeWithSelector(
+          TokenManagerUpgradeable.accept.selector,
+          CallMetadata(sourceChainId, address(sourceTokenManager)), // From
+            abi.encode(
+                ITokenManagerStructs.AcceptArgs(
+                    address(bridgedToken),
+                    remoteUser,
+                    amount
+                )
+            ) // To
+        );
+
+        // Transfer.
+        vm.expectEmit(address(sourceChainGateway));
+        emit IRelayerEvents.Relayed(
+            remoteChainId,
+            address(remoteTokenManager),
+            data,
+            1_000_000,
+            0
+        );
+        sourceTokenManager.transfer{value: amount + fees}(
+            address(0),
+            remoteChainId,
+            remoteUser,
+            amount
+        );
+
+        // Make the bridge txn
+        vm.startPrank(validator);
+        bytes[] memory signatures = new bytes[](1);
+        signatures[0] = sign(
+            validatorWallet,
+            abi
+                .encode(
+                    sourceChainId,
+                    remoteChainId,
+                    address(remoteTokenManager),
+                    data,
+                    1_000_000,
+                    0
+                )
+                .toEthSignedMessageHash()
+        );
+        remoteChainGateway.dispatch(
+            sourceChainId,
+            address(remoteTokenManager),
+            data,
+            1_000_000,
+            0,
+            signatures
+        );
+
+        // Check balances
+        assertEq(bridgedToken.balanceOf(remoteUser), amount);
+        assertEq(bridgedToken.totalSupply(), amount);
+        assertLe(sourceUser.balance, sourceUserOriginalBalance - amount);
+        uint sourceUserIntermediateBalance = sourceUser.balance;
+        
+        // Now sending it back
+        startHoax(remoteUser);
+        bridgedToken.approve(address(remoteTokenManager), amount);
+        remoteTokenManager.transfer{value: fees}(
+            address(bridgedToken),
+            sourceChainId,
+            sourceUser,
+            amount
+        );
+
+        //Mock Call
+        // Make the bridge txn
+        vm.startPrank(validator);
+        data = abi.encodeWithSelector(
+            TokenManagerUpgradeable.accept.selector,
+            CallMetadata(remoteChainId, address(remoteTokenManager)), // From
+            abi.encode(
+                ITokenManagerStructs.AcceptArgs(
+                    address(originalToken),
+                    sourceUser,
+                    amount
+                )
+            ) // To
+        );
+        signatures[0] = sign(
+            validatorWallet,
+            abi
+                .encode(
+                    remoteChainId,
+                    sourceChainId,
+                    address(sourceTokenManager),
+                    data,
+                    1_000_000,
+                    0
+                )
+                .toEthSignedMessageHash()
+        );
+        sourceChainGateway.dispatch(
+            remoteChainId,
+            address(sourceTokenManager),
+            data,
+            1_000_000,
+            0,
+            signatures
+        );
+
+        // Check balances back to normal
+        // Make an allowance for the gas fee.
+        uint est_gas_fee = 0.001 ether;
+        assertEq(bridgedToken.balanceOf(remoteUser), 0);
+        assertGe(sourceUser.balance, sourceUserIntermediateBalance + amount - est_gas_fee);
+    }
+}
diff --git a/smart-contracts/test/periphery/TokenManagerDeployers/LockAndReleaseOrNativeTokenManagerDeployer.sol b/smart-contracts/test/periphery/TokenManagerDeployers/LockAndReleaseOrNativeTokenManagerDeployer.sol
new file mode 100644
index 0000000..2f7b48b
--- /dev/null
+++ b/smart-contracts/test/periphery/TokenManagerDeployers/LockAndReleaseOrNativeTokenManagerDeployer.sol
@@ -0,0 +1,36 @@
+// SPDX-License-Identifier: MIT OR Apache-2.0
+pragma solidity 0.8.20;
+
+import {ERC1967Proxy} from "@openzeppelin/contracts/proxy/ERC1967/ERC1967Proxy.sol";
+import {LockAndReleaseTokenManagerUpgradeable} from "contracts/periphery/LockAndReleaseTokenManagerUpgradeable.sol";
+import {LockAndReleaseTokenManagerUpgradeableV2} from "contracts/periphery/TokenManagerV2/LockAndReleaseTokenManagerUpgradeableV2.sol";
+import {LockAndReleaseOrNativeTokenManagerUpgradeableV3} from "contracts/periphery/TokenManagerV3/LockAndReleaseOrNativeTokenManagerUpgradeableV3.sol";
+import {LockAndReleaseTokenManagerDeployer} from "./LockAndReleaseTokenManagerDeployer.sol";
+
+abstract contract LockAndReleaseOrNativeTokenManagerDeployer is
+    LockAndReleaseTokenManagerDeployer {
+    function deployLockAndReleaseOrNativeTokenManagerV3(
+        address chainGateway,
+        uint fees
+    ) public returns (LockAndReleaseOrNativeTokenManagerUpgradeableV3) {
+        LockAndReleaseTokenManagerUpgradeableV2 proxy = deployLockAndReleaseTokenManagerV2(
+                chainGateway,
+                fees
+            );
+
+        address newImplementation = address(
+            new LockAndReleaseOrNativeTokenManagerUpgradeableV3()
+        );
+
+        proxy.upgradeToAndCall(newImplementation, "");
+
+        return LockAndReleaseOrNativeTokenManagerUpgradeableV3(payable(address(proxy)));
+    }
+
+    function deployLatestLockAndReleaseOrNativeTokenManager(
+        address chainGateway,
+        uint fees
+    ) public returns (LockAndReleaseOrNativeTokenManagerUpgradeableV3) {
+        return deployLockAndReleaseOrNativeTokenManagerV3(chainGateway, fees);
+    }
+}
diff --git a/smart-contracts/test/zilbridge/DeployZilBridge.t.sol b/smart-contracts/test/zilbridge/DeployZilBridge.t.sol
new file mode 100644
index 0000000..f8c2910
--- /dev/null
+++ b/smart-contracts/test/zilbridge/DeployZilBridge.t.sol
@@ -0,0 +1,124 @@
+// SPDX-License-Identifier: MIT OR Apache-2.0
+pragma solidity 0.8.20;
+
+import "forge-std/console.sol";
+import {Tester} from "test/Tester.sol";
+import {TestToken} from "test/Helpers.sol";
+import { LockProxy } from "test/zilbridge/infrastructure/lockProxy.sol";
+import { TestingLockProxy } from "./TestingLockProxy.sol";
+import { EthCrossChainManagerProxy } from "test/zilbridge/infrastructure/ccmProxy.sol";
+import { EthCrossChainManager } from "test/zilbridge/infrastructure/ccmCrossChainManager.sol";
+import { EthCrossChainData } from "test/zilbridge/infrastructure/ethCrossChainData.sol";
+import { EthExtendCrossChainManager } from "contracts/periphery/ZilBridge/ccmExtendCrossChainManager.sol";
+import { LockProxyTokenManagerUpgradeableV3 } from "contracts/periphery/TokenManagerV3/LockProxyTokenManagerUpgradeableV3.sol";
+import { LockProxyTokenManagerDeployer } from "test/zilbridge/TokenManagerDeployers/LockProxyTokenManagerDeployer.sol";
+
+abstract contract ZilBridgeFixture is Tester, LockProxyTokenManagerDeployer {
+  address owner = vm.createWallet("owner").addr;
+  address tokenDeployer = vm.createWallet("tokenDeployer").addr;
+  address other = vm.createWallet("other").addr;
+  address third = vm.createWallet("third").addr;
+  uint64 constant COUNTERPART_CHAIN_ID = 5;
+  uint64 constant CHAIN_ID = 2;
+ 
+  EthCrossChainManager ccm;
+  EthCrossChainManagerProxy ccmProxy;
+  EthCrossChainData eccd;
+  TestingLockProxy lockProxy;
+  EthExtendCrossChainManager extendCCM;
+
+  
+  function deployOriginalContracts() internal {
+    vm.startPrank(owner);
+    address[] memory a = new address[](0);
+    bytes[] memory b = new bytes[](0);
+    console.log("deploy_as = %s", owner);
+    eccd = new EthCrossChainData();
+    ccm = new EthCrossChainManager(address(eccd), CHAIN_ID, a,b);
+    ccmProxy = new EthCrossChainManagerProxy(address(ccm));
+    // Now give the ccm to the ccmProxy
+    ccm.transferOwnership(address(ccmProxy));
+    // and give the data to the ccm.
+    eccd.transferOwnership(address(ccm));
+    lockProxy = new TestingLockProxy(address(ccmProxy), COUNTERPART_CHAIN_ID);
+    vm.stopPrank();
+  }
+
+  function installExtendCrossChainManager(address act_as) internal {
+    vm.startPrank(act_as);
+    console.log("act_as = %s", act_as);
+    address[] memory a = new address[](0);
+    bytes[] memory b = new bytes[](0);
+    extendCCM = new EthExtendCrossChainManager(address(eccd), 2, a, b);
+    console.log("ccmProxy owner  = %s", ccmProxy.owner());
+    console.log("ccmProxy ccm = %s", ccmProxy.getEthCrossChainManager());
+    console.log("eccm owner = %s", ccm.owner());
+    console.log("eccd owner = %s", eccd.owner());
+    console.log("ccm = %s", address(ccm));
+    ccmProxy.pauseEthCrossChainManager();
+    extendCCM.transferOwnership(address(ccmProxy));
+    require(ccmProxy.upgradeEthCrossChainManager(address(extendCCM)));
+    ccmProxy.unpauseEthCrossChainManager();
+    vm.stopPrank();
+ }
+
+  function setUpZilBridgeForTesting() internal {
+    deployOriginalContracts();
+    installExtendCrossChainManager(owner);
+  }
+
+  function installTokenManager(address lpTokenManager) internal {
+    // Make it an extension
+    vm.startPrank(owner);
+    extendCCM.forciblyAddExtension(address(lockProxy), address(lpTokenManager), COUNTERPART_CHAIN_ID);
+    vm.stopPrank();
+  }
+
+  function getLockProxy() public view returns (TestingLockProxy) {
+    return lockProxy;
+  }
+
+}
+
+contract DeployZilBridgeTest is ZilBridgeFixture {
+  function test_ZilBridgeDeploy() external {
+    deployOriginalContracts();
+    // The owner of the proxy is us
+    require(ccmProxy.owner() == owner);
+    // The ccmProxy's ccm is the ccm we installed.
+    require(ccmProxy.getEthCrossChainManager() == address(ccm));
+    // The owner of the ccm is the ccmProxy
+    require(ccm.owner() == address(ccmProxy));
+    // the eccd is installed
+    require(ccm.EthCrossChainDataAddress() == address(eccd));
+    // the eccd's owner is the ccm
+    require(eccd.owner() == address(ccm));
+  }
+
+  function test_ZilBridgeUpgrade() external {
+    deployOriginalContracts();
+    installExtendCrossChainManager(owner);
+
+    // The owner of the proxy is us
+    require(ccmProxy.owner() == owner);
+    // The ccmProxy's ccm is the new CCM
+    require(ccmProxy.getEthCrossChainManager() == address(extendCCM));
+    // The ccm's owner is the ccm Proxy
+    require(extendCCM.owner() == address(ccmProxy));
+    // The ccm's eccd is intact
+    require(extendCCM.EthCrossChainDataAddress() == address(eccd));
+    // The eccd's owner is the ccm.
+    require(eccd.owner() == address(extendCCM));
+
+    // We're unpaused
+    require(!extendCCM.paused());
+    require(!ccmProxy.paused());
+  }
+
+
+
+  function test_installTokenManager() external {
+    deployOriginalContracts();
+    installExtendCrossChainManager(owner);
+  }
+}
diff --git a/smart-contracts/test/zilbridge/MockLockProxy.sol b/smart-contracts/test/zilbridge/MockLockProxy.sol
new file mode 100644
index 0000000..a8777bb
--- /dev/null
+++ b/smart-contracts/test/zilbridge/MockLockProxy.sol
@@ -0,0 +1,311 @@
+// SPDX-License-Identifier: MIT
+pragma solidity 0.8.20;
+
+// This is a mock lock proxy - it looks like a LockProxy, but has the CCM stuff removed so that it can be
+// deployed fairly easily. We use it to test the remote side of transfers, because otherwise we would have to
+// generate a lot of complex spurious mechanism.
+
+interface ERC20 {
+    function approve(address spender, uint256 amount) external returns (bool);
+    function transfer(address recipient, uint256 amount) external returns (bool);
+    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
+    function balanceOf(address account) external view returns (uint256);
+}
+
+
+/**
+ * @dev Wrappers over Solidity's arithmetic operations with added overflow
+ * checks.
+ *
+ * Arithmetic operations in Solidity wrap on overflow. This can easily result
+ * in bugs, because programmers usually assume that an overflow raises an
+ * error, which is the standard behavior in high level programming languages.
+ * `SafeMath` restores this intuition by reverting the transaction when an
+ * operation overflows.
+ *
+ * Using this library instead of the unchecked operations eliminates an entire
+ * class of bugs, so it's recommended to use it always.
+ */
+library SafeMath {
+    /**
+     * @dev Returns the addition of two unsigned integers, reverting on
+     * overflow.
+     *
+     * Counterpart to Solidity's `+` operator.
+     *
+     * Requirements:
+     * - Addition cannot overflow.
+     */
+    function add(uint256 a, uint256 b) internal pure returns (uint256) {
+        uint256 c = a + b;
+        require(c >= a, "SafeMath: addition overflow");
+
+        return c;
+    }
+
+    /**
+     * @dev Returns the subtraction of two unsigned integers, reverting on
+     * overflow (when the result is negative).
+     *
+     * Counterpart to Solidity's `-` operator.
+     *
+     * Requirements:
+     * - Subtraction cannot overflow.
+     */
+    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
+        return sub(a, b, "SafeMath: subtraction overflow");
+    }
+
+    /**
+     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
+     * overflow (when the result is negative).
+     *
+     * Counterpart to Solidity's `-` operator.
+     *
+     * Requirements:
+     * - Subtraction cannot overflow.
+     */
+    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
+        require(b <= a, errorMessage);
+        uint256 c = a - b;
+
+        return c;
+    }
+
+    /**
+     * @dev Returns the multiplication of two unsigned integers, reverting on
+     * overflow.
+     *
+     * Counterpart to Solidity's `*` operator.
+     *
+     * Requirements:
+     * - Multiplication cannot overflow.
+     */
+    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
+        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
+        // benefit is lost if 'b' is also tested.
+        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
+        if (a == 0) {
+            return 0;
+        }
+
+        uint256 c = a * b;
+        require(c / a == b, "SafeMath: multiplication overflow");
+
+        return c;
+    }
+
+    /**
+     * @dev Returns the integer division of two unsigned integers. Reverts on
+     * division by zero. The result is rounded towards zero.
+     *
+     * Counterpart to Solidity's `/` operator. Note: this function uses a
+     * `revert` opcode (which leaves remaining gas untouched) while Solidity
+     * uses an invalid opcode to revert (consuming all remaining gas).
+     *
+     * Requirements:
+     * - The divisor cannot be zero.
+     */
+    function div(uint256 a, uint256 b) internal pure returns (uint256) {
+        return div(a, b, "SafeMath: division by zero");
+    }
+
+    /**
+     * @dev Returns the integer division of two unsigned integers. Reverts with custom message on
+     * division by zero. The result is rounded towards zero.
+     *
+     * Counterpart to Solidity's `/` operator. Note: this function uses a
+     * `revert` opcode (which leaves remaining gas untouched) while Solidity
+     * uses an invalid opcode to revert (consuming all remaining gas).
+     *
+     * Requirements:
+     * - The divisor cannot be zero.
+     */
+    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
+        // Solidity only automatically asserts when dividing by 0
+        require(b > 0, errorMessage);
+        uint256 c = a / b;
+        // assert(a == b * c + a % b); // There is no case in which this doesn't hold
+
+        return c;
+    }
+
+    /**
+     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
+     * Reverts when dividing by zero.
+     *
+     * Counterpart to Solidity's `%` operator. This function uses a `revert`
+     * opcode (which leaves remaining gas untouched) while Solidity uses an
+     * invalid opcode to revert (consuming all remaining gas).
+     *
+     * Requirements:
+     * - The divisor cannot be zero.
+     */
+    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
+        return mod(a, b, "SafeMath: modulo by zero");
+    }
+
+    /**
+     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
+     * Reverts with custom message when dividing by zero.
+     *
+     * Counterpart to Solidity's `%` operator. This function uses a `revert`
+     * opcode (which leaves remaining gas untouched) while Solidity uses an
+     * invalid opcode to revert (consuming all remaining gas).
+     *
+     * Requirements:
+     * - The divisor cannot be zero.
+     */
+    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
+        require(b != 0, errorMessage);
+        return a % b;
+    }
+}
+
+
+// THIS CONTRACT IS WOEFULLY INSECURE AND ONLY TO BE USED FOR TESTING!
+contract MockLockProxy {
+  using SafeMath for uint256;
+  address public constant ETH_ASSET_HASH = address(0);
+
+  constructor() { }
+
+  /// @dev Allow this contract to receive Ethereum
+  receive() external payable {}
+
+  function extensionTransfer(address _receivingAddress, address _assetHash, uint256 _amount) external returns (bool) {
+    if (_assetHash == ETH_ASSET_HASH) {
+            // we use `call` here since the _receivingAddress could be a contract
+            // see https://diligence.consensys.net/blog/2019/09/stop-using-soliditys-transfer-now/
+            // for more info
+            (bool success,  ) = _receivingAddress.call{value: _amount}("");
+            require(success, "Transfer failed");
+            return true;
+        }
+
+        ERC20 token = ERC20(_assetHash);
+        _callOptionalReturn(
+            token,
+            abi.encodeWithSelector(
+                token.approve.selector,
+                _receivingAddress,
+                _amount
+            )
+        );
+
+        return true;
+    }
+
+
+  function mock_transferIn(
+      address _assetHash,
+      uint256 _amount,
+      uint256 _callAmount
+    )
+      public payable
+    {
+        if (_assetHash == ETH_ASSET_HASH) {
+          require(msg.value == _amount, "ETH transferred does not match the expected amount");
+          return;
+        }
+
+        ERC20 token = ERC20(_assetHash);
+        uint256 before = token.balanceOf(address(this));
+        _callOptionalReturn(
+            token,
+            abi.encodeWithSelector(
+                token.transferFrom.selector,
+                msg.sender,
+                address(this),
+                _callAmount
+            )
+        );
+        uint256 transferred = token.balanceOf(address(this)).sub(before);
+        require(transferred == _amount, "Tokens transferred does not match the expected amount");
+    }
+
+    /// @dev transfers funds from this contract to the _toAddress
+    function mock_transferOut(
+        address _toAddress,
+        address _assetHash,
+        uint256 _amount
+    )
+        public
+    {
+        if (_assetHash == ETH_ASSET_HASH) {
+            // we use `call` here since the _receivingAddress could be a contract
+            // see https://diligence.consensys.net/blog/2019/09/stop-using-soliditys-transfer-now/
+            // for more info
+            (bool success,  ) = _toAddress.call{value: _amount}("");
+            require(success, "Transfer failed");
+            return;
+        }
+
+        ERC20 token = ERC20(_assetHash);
+        _callOptionalReturn(
+            token,
+            abi.encodeWithSelector(
+                token.transfer.selector,
+                _toAddress,
+                _amount
+            )
+        );
+    }
+
+        /**
+     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
+     * on the return value: the return value is optional (but if data is returned, it must not be false).
+     * @param token The token targeted by the call.
+     * @param data The call data (encoded using abi.encode or one of its variants).
+     */
+    function _callOptionalReturn(ERC20 token, bytes memory data) private {
+        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
+        // we're implementing it ourselves.
+
+        // A Solidity high level call has three parts:
+        //  1. The target address is checked to verify it contains contract code
+        //  2. The call itself is made, and success asserted
+        //  3. The return value is decoded, which in turn checks the size of the returned data.
+        // solhint-disable-next-line max-line-length
+        require(_isContract(address(token)), "SafeERC20: call to non-contract");
+
+        // solhint-disable-next-line avoid-low-level-calls
+        (bool success, bytes memory returndata) = address(token).call(data);
+        require(success, "SafeERC20: low-level call failed");
+
+        if (returndata.length > 0) { // Return data is optional
+            // solhint-disable-next-line max-line-length
+            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
+        }
+    }
+
+        /**
+     * @dev Returns true if `account` is a contract.
+     *
+     * [IMPORTANT]
+     * ====
+     * It is unsafe to assume that an address for which this function returns
+     * false is an externally-owned account (EOA) and not a contract.
+     *
+     * Among others, `_isContract` will return false for the following
+     * types of addresses:
+     *
+     *  - an externally-owned account
+     *  - a contract in construction
+     *  - an address where a contract will be created
+     *  - an address where a contract lived, but was destroyed
+     * ====
+     */
+    function _isContract(address account) private view returns (bool) {
+        // According to EIP-1052, 0x0 is the value returned for not-yet created accounts
+        // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
+        // for accounts without code, i.e. `keccak256('')`
+        bytes32 codehash;
+        bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
+        // solhint-disable-next-line no-inline-assembly
+        assembly { codehash := extcodehash(account) }
+        return (codehash != accountHash && codehash != 0x0);
+    }
+
+
+}
diff --git a/smart-contracts/test/zilbridge/TestingLockProxy.sol b/smart-contracts/test/zilbridge/TestingLockProxy.sol
new file mode 100644
index 0000000..6debfc9
--- /dev/null
+++ b/smart-contracts/test/zilbridge/TestingLockProxy.sol
@@ -0,0 +1,1896 @@
+// SPDX-License-Identifier: MIT
+pragma solidity 0.8.20;
+
+// This is a real LockProxy extended with methods for testing which are
+// WOEFULLY INSECURE - they allow you to synthetically lock and unlock funds
+// so we can test the cases where we bridge tokens over XBridge that were
+// previously bridged on ZilBridge.
+
+/**
+ *Submitted for verification at Etherscan.io on 2020-11-09
+*/
+
+// File: contracts/libs/common/ZeroCopySource.sol
+
+/**
+ * @dev Wrappers over decoding and deserialization operation from bytes into bassic types in Solidity for PolyNetwork cross chain utility.
+ *
+ * Decode into basic types in Solidity from bytes easily. It's designed to be used
+ * for PolyNetwork cross chain application, and the decoding rules on Ethereum chain
+ * and the encoding rule on other chains should be consistent, and . Here we
+ * follow the underlying deserialization rule with implementation found here:
+ * https://github.com/polynetwork/poly/blob/master/common/zero_copy_source.go
+ *
+ * Using this library instead of the unchecked serialization method can help reduce
+ * the risk of serious bugs and handfule, so it's recommended to use it.
+ *
+ * Please note that risk can be minimized, yet not eliminated.
+ */
+library ZeroCopySource {
+    /* @notice              Read next byte as boolean type starting at offset from buff
+    *  @param buff          Source bytes array
+    *  @param offset        The position from where we read the boolean value
+    *  @return              The the read boolean value and new offset
+    */
+    function NextBool(bytes memory buff, uint256 offset) internal pure returns(bool, uint256) {
+        require(offset + 1 <= buff.length && offset < offset + 1, "Offset exceeds limit");
+        // byte === bytes1
+        bytes1 v;
+        assembly{
+            v := mload(add(add(buff, 0x20), offset))
+        }
+        bool value;
+        if (v == 0x01) {
+		    value = true;
+    	} else if (v == 0x00) {
+            value = false;
+        } else {
+            revert("NextBool value error");
+        }
+        return (value, offset + 1);
+    }
+
+    /* @notice              Read next byte starting at offset from buff
+    *  @param buff          Source bytes array
+    *  @param offset        The position from where we read the byte value
+    *  @return              The read byte value and new offset
+    */
+    function NextByte(bytes memory buff, uint256 offset) internal pure returns (bytes1, uint256) {
+        require(offset + 1 <= buff.length && offset < offset + 1, "NextByte, Offset exceeds maximum");
+        bytes1 v;
+        assembly{
+            v := mload(add(add(buff, 0x20), offset))
+        }
+        return (v, offset + 1);
+    }
+
+    /* @notice              Read next byte as uint8 starting at offset from buff
+    *  @param buff          Source bytes array
+    *  @param offset        The position from where we read the byte value
+    *  @return              The read uint8 value and new offset
+    */
+    function NextUint8(bytes memory buff, uint256 offset) internal pure returns (uint8, uint256) {
+        require(offset + 1 <= buff.length && offset < offset + 1, "NextUint8, Offset exceeds maximum");
+        uint8 v;
+        assembly{
+            let tmpbytes := mload(0x40)
+            let bvalue := mload(add(add(buff, 0x20), offset))
+            mstore8(tmpbytes, byte(0, bvalue))
+            mstore(0x40, add(tmpbytes, 0x01))
+            v := mload(sub(tmpbytes, 0x1f))
+        }
+        return (v, offset + 1);
+    }
+
+    /* @notice              Read next two bytes as uint16 type starting from offset
+    *  @param buff          Source bytes array
+    *  @param offset        The position from where we read the uint16 value
+    *  @return              The read uint16 value and updated offset
+    */
+    function NextUint16(bytes memory buff, uint256 offset) internal pure returns (uint16, uint256) {
+        require(offset + 2 <= buff.length && offset < offset + 2, "NextUint16, offset exceeds maximum");
+
+        uint16 v;
+        assembly {
+            let tmpbytes := mload(0x40)
+            let bvalue := mload(add(add(buff, 0x20), offset))
+            mstore8(tmpbytes, byte(0x01, bvalue))
+            mstore8(add(tmpbytes, 0x01), byte(0, bvalue))
+            mstore(0x40, add(tmpbytes, 0x02))
+            v := mload(sub(tmpbytes, 0x1e))
+        }
+        return (v, offset + 2);
+    }
+
+
+    /* @notice              Read next four bytes as uint32 type starting from offset
+    *  @param buff          Source bytes array
+    *  @param offset        The position from where we read the uint32 value
+    *  @return              The read uint32 value and updated offset
+    */
+    function NextUint32(bytes memory buff, uint256 offset) internal pure returns (uint32, uint256) {
+        require(offset + 4 <= buff.length && offset < offset + 4, "NextUint32, offset exceeds maximum");
+        uint32 v;
+        assembly {
+            let tmpbytes := mload(0x40)
+            let byteLen := 0x04
+            for {
+                let tindex := 0x00
+                let bindex := sub(byteLen, 0x01)
+                let bvalue := mload(add(add(buff, 0x20), offset))
+            } lt(tindex, byteLen) {
+                tindex := add(tindex, 0x01)
+                bindex := sub(bindex, 0x01)
+            }{
+                mstore8(add(tmpbytes, tindex), byte(bindex, bvalue))
+            }
+            mstore(0x40, add(tmpbytes, byteLen))
+            v := mload(sub(tmpbytes, sub(0x20, byteLen)))
+        }
+        return (v, offset + 4);
+    }
+
+    /* @notice              Read next eight bytes as uint64 type starting from offset
+    *  @param buff          Source bytes array
+    *  @param offset        The position from where we read the uint64 value
+    *  @return              The read uint64 value and updated offset
+    */
+    function NextUint64(bytes memory buff, uint256 offset) internal pure returns (uint64, uint256) {
+        require(offset + 8 <= buff.length && offset < offset + 8, "NextUint64, offset exceeds maximum");
+        uint64 v;
+        assembly {
+            let tmpbytes := mload(0x40)
+            let byteLen := 0x08
+            for {
+                let tindex := 0x00
+                let bindex := sub(byteLen, 0x01)
+                let bvalue := mload(add(add(buff, 0x20), offset))
+            } lt(tindex, byteLen) {
+                tindex := add(tindex, 0x01)
+                bindex := sub(bindex, 0x01)
+            }{
+                mstore8(add(tmpbytes, tindex), byte(bindex, bvalue))
+            }
+            mstore(0x40, add(tmpbytes, byteLen))
+            v := mload(sub(tmpbytes, sub(0x20, byteLen)))
+        }
+        return (v, offset + 8);
+    }
+
+    /* @notice              Read next 32 bytes as uint256 type starting from offset,
+                            there are limits considering the numerical limits in multi-chain
+    *  @param buff          Source bytes array
+    *  @param offset        The position from where we read the uint256 value
+    *  @return              The read uint256 value and updated offset
+    */
+    function NextUint255(bytes memory buff, uint256 offset) internal pure returns (uint256, uint256) {
+        require(offset + 32 <= buff.length && offset < offset + 32, "NextUint255, offset exceeds maximum");
+        uint256 v;
+        assembly {
+            let tmpbytes := mload(0x40)
+            let byteLen := 0x20
+            for {
+                let tindex := 0x00
+                let bindex := sub(byteLen, 0x01)
+                let bvalue := mload(add(add(buff, 0x20), offset))
+            } lt(tindex, byteLen) {
+                tindex := add(tindex, 0x01)
+                bindex := sub(bindex, 0x01)
+            }{
+                mstore8(add(tmpbytes, tindex), byte(bindex, bvalue))
+            }
+            mstore(0x40, add(tmpbytes, byteLen))
+            v := mload(tmpbytes)
+        }
+        require(v <= 0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff, "Value exceeds the range");
+        return (v, offset + 32);
+    }
+    /* @notice              Read next variable bytes starting from offset,
+                            the decoding rule coming from multi-chain
+    *  @param buff          Source bytes array
+    *  @param offset        The position from where we read the bytes value
+    *  @return              The read variable bytes array value and updated offset
+    */
+    function NextVarBytes(bytes memory buff, uint256 offset) internal pure returns(bytes memory, uint256) {
+        uint len;
+        (len, offset) = NextVarUint(buff, offset);
+        require(offset + len <= buff.length && offset < offset + len, "NextVarBytes, offset exceeds maximum");
+        bytes memory tempBytes;
+        assembly{
+            switch iszero(len)
+            case 0 {
+                // Get a location of some free memory and store it in tempBytes as
+                // Solidity does for memory variables.
+                tempBytes := mload(0x40)
+
+                // The first word of the slice result is potentially a partial
+                // word read from the original array. To read it, we calculate
+                // the length of that partial word and start copying that many
+                // bytes into the array. The first word we copy will start with
+                // data we don't care about, but the last `lengthmod` bytes will
+                // land at the beginning of the contents of the new array. When
+                // we're done copying, we overwrite the full first word with
+                // the actual length of the slice.
+                let lengthmod := and(len, 31)
+
+                // The multiplication in the next line is necessary
+                // because when slicing multiples of 32 bytes (lengthmod == 0)
+                // the following copy loop was copying the origin's length
+                // and then ending prematurely not copying everything it should.
+                let mc := add(add(tempBytes, lengthmod), mul(0x20, iszero(lengthmod)))
+                let end := add(mc, len)
+
+                for {
+                    // The multiplication in the next line has the same exact purpose
+                    // as the one above.
+                    let cc := add(add(add(buff, lengthmod), mul(0x20, iszero(lengthmod))), offset)
+                } lt(mc, end) {
+                    mc := add(mc, 0x20)
+                    cc := add(cc, 0x20)
+                } {
+                    mstore(mc, mload(cc))
+                }
+
+                mstore(tempBytes, len)
+
+                //update free-memory pointer
+                //allocating the array padded to 32 bytes like the compiler does now
+                mstore(0x40, and(add(mc, 31), not(31)))
+            }
+            //if we want a zero-length slice let's just return a zero-length array
+            default {
+                tempBytes := mload(0x40)
+
+                mstore(0x40, add(tempBytes, 0x20))
+            }
+        }
+
+        return (tempBytes, offset + len);
+    }
+    /* @notice              Read next 32 bytes starting from offset,
+    *  @param buff          Source bytes array
+    *  @param offset        The position from where we read the bytes value
+    *  @return              The read bytes32 value and updated offset
+    */
+    function NextHash(bytes memory buff, uint256 offset) internal pure returns (bytes32 , uint256) {
+        require(offset + 32 <= buff.length && offset < offset + 32, "NextHash, offset exceeds maximum");
+        bytes32 v;
+        assembly {
+            v := mload(add(buff, add(offset, 0x20)))
+        }
+        return (v, offset + 32);
+    }
+
+    /* @notice              Read next 20 bytes starting from offset,
+    *  @param buff          Source bytes array
+    *  @param offset        The position from where we read the bytes value
+    *  @return              The read bytes20 value and updated offset
+    */
+    function NextBytes20(bytes memory buff, uint256 offset) internal pure returns (bytes20 , uint256) {
+        require(offset + 20 <= buff.length && offset < offset + 20, "NextBytes20, offset exceeds maximum");
+        bytes20 v;
+        assembly {
+            v := mload(add(buff, add(offset, 0x20)))
+        }
+        return (v, offset + 20);
+    }
+
+    function NextVarUint(bytes memory buff, uint256 offset) internal pure returns(uint, uint256) {
+        bytes1 v;
+        (v, offset) = NextByte(buff, offset);
+
+        uint value;
+        if (v == 0xFD) {
+            // return NextUint16(buff, offset);
+            (value, offset) = NextUint16(buff, offset);
+            require(value >= 0xFD && value <= 0xFFFF, "NextUint16, value outside range");
+            return (value, offset);
+        } else if (v == 0xFE) {
+            // return NextUint32(buff, offset);
+            (value, offset) = NextUint32(buff, offset);
+            require(value > 0xFFFF && value <= 0xFFFFFFFF, "NextVarUint, value outside range");
+            return (value, offset);
+        } else if (v == 0xFF) {
+            // return NextUint64(buff, offset);
+            (value, offset) = NextUint64(buff, offset);
+            require(value > 0xFFFFFFFF, "NextVarUint, value outside range");
+            return (value, offset);
+        } else{
+            // return (uint8(v), offset);
+            value = uint8(v);
+            require(value < 0xFD, "NextVarUint, value outside range");
+            return (value, offset);
+        }
+    }
+}
+
+// File: contracts/libs/common/ZeroCopySink.sol
+
+
+/**
+ * @dev Wrappers over encoding and serialization operation into bytes from bassic types in Solidity for PolyNetwork cross chain utility.
+ *
+ * Encode basic types in Solidity into bytes easily. It's designed to be used
+ * for PolyNetwork cross chain application, and the encoding rules on Ethereum chain
+ * and the decoding rules on other chains should be consistent. Here we
+ * follow the underlying serialization rule with implementation found here:
+ * https://github.com/polynetwork/poly/blob/master/common/zero_copy_sink.go
+ *
+ * Using this library instead of the unchecked serialization method can help reduce
+ * the risk of serious bugs and handfule, so it's recommended to use it.
+ *
+ * Please note that risk can be minimized, yet not eliminated.
+ */
+library ZeroCopySink {
+    /* @notice          Convert boolean value into bytes
+    *  @param b         The boolean value
+    *  @return          Converted bytes array
+    */
+    function WriteBool(bool b) internal pure returns (bytes memory) {
+        bytes memory buff;
+        assembly{
+            buff := mload(0x40)
+            mstore(buff, 1)
+            switch iszero(b)
+            case 1 {
+                mstore(add(buff, 0x20), shl(248, 0x00))
+                // mstore8(add(buff, 0x20), 0x00)
+            }
+            default {
+                mstore(add(buff, 0x20), shl(248, 0x01))
+                // mstore8(add(buff, 0x20), 0x01)
+            }
+            mstore(0x40, add(buff, 0x21))
+        }
+        return buff;
+    }
+
+    /* @notice          Convert byte value into bytes
+    *  @param b         The byte value
+    *  @return          Converted bytes array
+    */
+    function WriteByte(bytes1 b) internal pure returns (bytes memory) {
+        return WriteUint8(uint8(b));
+    }
+
+    /* @notice          Convert uint8 value into bytes
+    *  @param v         The uint8 value
+    *  @return          Converted bytes array
+    */
+    function WriteUint8(uint8 v) internal pure returns (bytes memory) {
+        bytes memory buff;
+        assembly{
+            buff := mload(0x40)
+            mstore(buff, 1)
+            mstore(add(buff, 0x20), shl(248, v))
+            // mstore(add(buff, 0x20), byte(0x1f, v))
+            mstore(0x40, add(buff, 0x21))
+        }
+        return buff;
+    }
+
+    /* @notice          Convert uint16 value into bytes
+    *  @param v         The uint16 value
+    *  @return          Converted bytes array
+    */
+    function WriteUint16(uint16 v) internal pure returns (bytes memory) {
+        bytes memory buff;
+
+        assembly{
+            buff := mload(0x40)
+            let byteLen := 0x02
+            mstore(buff, byteLen)
+            for {
+                let mindex := 0x00
+                let vindex := 0x1f
+            } lt(mindex, byteLen) {
+                mindex := add(mindex, 0x01)
+                vindex := sub(vindex, 0x01)
+            }{
+                mstore8(add(add(buff, 0x20), mindex), byte(vindex, v))
+            }
+            mstore(0x40, add(buff, 0x22))
+        }
+        return buff;
+    }
+
+    /* @notice          Convert uint32 value into bytes
+    *  @param v         The uint32 value
+    *  @return          Converted bytes array
+    */
+    function WriteUint32(uint32 v) internal pure returns(bytes memory) {
+        bytes memory buff;
+        assembly{
+            buff := mload(0x40)
+            let byteLen := 0x04
+            mstore(buff, byteLen)
+            for {
+                let mindex := 0x00
+                let vindex := 0x1f
+            } lt(mindex, byteLen) {
+                mindex := add(mindex, 0x01)
+                vindex := sub(vindex, 0x01)
+            }{
+                mstore8(add(add(buff, 0x20), mindex), byte(vindex, v))
+            }
+            mstore(0x40, add(buff, 0x24))
+        }
+        return buff;
+    }
+
+    /* @notice          Convert uint64 value into bytes
+    *  @param v         The uint64 value
+    *  @return          Converted bytes array
+    */
+    function WriteUint64(uint64 v) internal pure returns(bytes memory) {
+        bytes memory buff;
+
+        assembly{
+            buff := mload(0x40)
+            let byteLen := 0x08
+            mstore(buff, byteLen)
+            for {
+                let mindex := 0x00
+                let vindex := 0x1f
+            } lt(mindex, byteLen) {
+                mindex := add(mindex, 0x01)
+                vindex := sub(vindex, 0x01)
+            }{
+                mstore8(add(add(buff, 0x20), mindex), byte(vindex, v))
+            }
+            mstore(0x40, add(buff, 0x28))
+        }
+        return buff;
+    }
+
+    /* @notice          Convert limited uint256 value into bytes
+    *  @param v         The uint256 value
+    *  @return          Converted bytes array
+    */
+    function WriteUint255(uint256 v) internal pure returns (bytes memory) {
+        require(v <= 0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff, "Value exceeds uint255 range");
+        bytes memory buff;
+
+        assembly{
+            buff := mload(0x40)
+            let byteLen := 0x20
+            mstore(buff, byteLen)
+            for {
+                let mindex := 0x00
+                let vindex := 0x1f
+            } lt(mindex, byteLen) {
+                mindex := add(mindex, 0x01)
+                vindex := sub(vindex, 0x01)
+            }{
+                mstore8(add(add(buff, 0x20), mindex), byte(vindex, v))
+            }
+            mstore(0x40, add(buff, 0x40))
+        }
+        return buff;
+    }
+
+    /* @notice          Encode bytes format data into bytes
+    *  @param data      The bytes array data
+    *  @return          Encoded bytes array
+    */
+    function WriteVarBytes(bytes memory data) internal pure returns (bytes memory) {
+        uint64 l = uint64(data.length);
+        return abi.encodePacked(WriteVarUint(l), data);
+    }
+
+    function WriteVarUint(uint64 v) internal pure returns (bytes memory) {
+        if (v < 0xFD){
+    		return WriteUint8(uint8(v));
+    	} else if (v <= 0xFFFF) {
+    		return abi.encodePacked(WriteByte(0xFD), WriteUint16(uint16(v)));
+    	} else if (v <= 0xFFFFFFFF) {
+            return abi.encodePacked(WriteByte(0xFE), WriteUint32(uint32(v)));
+    	} else {
+    		return abi.encodePacked(WriteByte(0xFF), WriteUint64(uint64(v)));
+    	}
+    }
+}
+
+// File: contracts/libs/utils/ReentrancyGuard.sol
+
+
+/**
+ * @dev Contract module that helps prevent reentrant calls to a function.
+ *
+ * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
+ * available, which can be applied to functions to make sure there are no nested
+ * (reentrant) calls to them.
+ *
+ * Note that because there is a single `nonReentrant` guard, functions marked as
+ * `nonReentrant` may not call one another. This can be worked around by making
+ * those functions `private`, and then adding `external` `nonReentrant` entry
+ * points to them.
+ *
+ * TIP: If you would like to learn more about reentrancy and alternative ways
+ * to protect against it, check out our blog post
+ * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
+ */
+abstract contract ReentrancyGuard {
+    bool private _notEntered;
+
+    constructor () {
+        // Storing an initial non-zero value makes deployment a bit more
+        // expensive, but in exchange the refund on every call to nonReentrant
+        // will be lower in amount. Since refunds are capped to a percetange of
+        // the total transaction's gas, it is best to keep them low in cases
+        // like this one, to increase the likelihood of the full refund coming
+        // into effect.
+        _notEntered = true;
+    }
+
+    /**
+     * @dev Prevents a contract from calling itself, directly or indirectly.
+     * Calling a `nonReentrant` function from another `nonReentrant`
+     * function is not supported. It is possible to prevent this from happening
+     * by making the `nonReentrant` function external, and make it call a
+     * `private` function that does the actual work.
+     */
+    modifier nonReentrant() {
+        // On the first call to nonReentrant, _notEntered will be true
+        require(_notEntered, "ReentrancyGuard: reentrant call");
+
+        // Any calls to nonReentrant after this point will fail
+        _notEntered = false;
+
+        _;
+
+        // By storing the original value once again, a refund is triggered (see
+        // https://eips.ethereum.org/EIPS/eip-2200)
+        _notEntered = true;
+    }
+}
+
+// File: contracts/libs/utils/Utils.sol
+
+
+library Utils {
+
+    /* @notice      Convert the bytes array to bytes32 type, the bytes array length must be 32
+    *  @param _bs   Source bytes array
+    *  @return      bytes32
+    */
+    function bytesToBytes32(bytes memory _bs) internal pure returns (bytes32 value) {
+        require(_bs.length == 32, "bytes length is not 32.");
+        assembly {
+            // load 32 bytes from memory starting from position _bs + 0x20 since the first 0x20 bytes stores _bs length
+            value := mload(add(_bs, 0x20))
+        }
+    }
+
+    /* @notice      Convert bytes to uint256
+    *  @param _b    Source bytes should have length of 32
+    *  @return      uint256
+    */
+    function bytesToUint256(bytes memory _bs) internal pure returns (uint256 value) {
+        require(_bs.length == 32, "bytes length is not 32.");
+        assembly {
+            // load 32 bytes from memory starting from position _bs + 32
+            value := mload(add(_bs, 0x20))
+        }
+        require(value <= 0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff, "Value exceeds the range");
+    }
+
+    /* @notice      Convert uint256 to bytes
+    *  @param _b    uint256 that needs to be converted
+    *  @return      bytes
+    */
+    function uint256ToBytes(uint256 _value) internal pure returns (bytes memory bs) {
+        require(_value <= 0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff, "Value exceeds the range");
+        assembly {
+            // Get a location of some free memory and store it in result as
+            // Solidity does for memory variables.
+            bs := mload(0x40)
+            // Put 0x20 at the first word, the length of bytes for uint256 value
+            mstore(bs, 0x20)
+            //In the next word, put value in bytes format to the next 32 bytes
+            mstore(add(bs, 0x20), _value)
+            // Update the free-memory pointer by padding our last write location to 32 bytes
+            mstore(0x40, add(bs, 0x40))
+        }
+    }
+
+    /* @notice      Convert bytes to address
+    *  @param _bs   Source bytes: bytes length must be 20
+    *  @return      Converted address from source bytes
+    */
+    function bytesToAddress(bytes memory _bs) internal pure returns (address addr)
+    {
+        require(_bs.length == 20, "bytes length does not match address");
+        assembly {
+            // for _bs, first word store _bs.length, second word store _bs.value
+            // load 32 bytes from mem[_bs+20], convert it into Uint160, meaning we take last 20 bytes as addr (address).
+            addr := mload(add(_bs, 0x14))
+        }
+
+    }
+
+    /* @notice      Convert address to bytes
+    *  @param _addr Address need to be converted
+    *  @return      Converted bytes from address
+    */
+    function addressToBytes(address _addr) internal pure returns (bytes memory bs){
+        assembly {
+            // Get a location of some free memory and store it in result as
+            // Solidity does for memory variables.
+            bs := mload(0x40)
+            // Put 20 (address byte length) at the first word, the length of bytes for uint256 value
+            mstore(bs, 0x14)
+            // logical shift left _a by 12 bytes, change _a from right-aligned to left-aligned
+            mstore(add(bs, 0x20), shl(96, _addr))
+            // Update the free-memory pointer by padding our last write location to 32 bytes
+            mstore(0x40, add(bs, 0x40))
+       }
+    }
+
+    /* @notice          Do hash leaf as the multi-chain does
+    *  @param _data     Data in bytes format
+    *  @return          Hashed value in bytes32 format
+    */
+    function hashLeaf(bytes memory _data) internal pure returns (bytes32 result)  {
+        result = sha256(abi.encodePacked(bytes1(0x0), _data));
+    }
+
+    /* @notice          Do hash children as the multi-chain does
+    *  @param _l        Left node
+    *  @param _r        Right node
+    *  @return          Hashed value in bytes32 format
+    */
+    function hashChildren(bytes32 _l, bytes32  _r) internal pure returns (bytes32 result)  {
+        result = sha256(abi.encodePacked(bytes1(0x01), _l, _r));
+    }
+
+    /* @notice              Compare if two bytes are equal, which are in storage and memory, seperately
+                            Refer from https://github.com/summa-tx/bitcoin-spv/blob/master/solidity/contracts/BytesLib.sol#L368
+    *  @param _preBytes     The bytes stored in storage
+    *  @param _postBytes    The bytes stored in memory
+    *  @return              Bool type indicating if they are equal
+    */
+    function equalStorage(bytes storage _preBytes, bytes memory _postBytes) internal view returns (bool) {
+        bool success = true;
+
+        assembly {
+            // we know _preBytes_offset is 0
+            let fslot := sload(_preBytes.slot)
+            // Arrays of 31 bytes or less have an even value in their slot,
+            // while longer arrays have an odd value. The actual length is
+            // the slot divided by two for odd values, and the lowest order
+            // byte divided by two for even values.
+            // If the slot is even, bitwise and the slot with 255 and divide by
+            // two to get the length. If the slot is odd, bitwise and the slot
+            // with -1 and divide by two.
+            let slength := div(and(fslot, sub(mul(0x100, iszero(and(fslot, 1))), 1)), 2)
+            let mlength := mload(_postBytes)
+
+            // if lengths don't match the arrays are not equal
+            switch eq(slength, mlength)
+            case 1 {
+                // fslot can contain both the length and contents of the array
+                // if slength < 32 bytes so let's prepare for that
+                // v. http://solidity.readthedocs.io/en/latest/miscellaneous.html#layout-of-state-variables-in-storage
+                // slength != 0
+                if iszero(iszero(slength)) {
+                    switch lt(slength, 32)
+                    case 1 {
+                        // blank the last byte which is the length
+                        fslot := mul(div(fslot, 0x100), 0x100)
+
+                        if iszero(eq(fslot, mload(add(_postBytes, 0x20)))) {
+                            // unsuccess:
+                            success := 0
+                        }
+                    }
+                    default {
+                        // cb is a circuit breaker in the for loop since there's
+                        //  no said feature for inline assembly loops
+                        // cb = 1 - don't breaker
+                        // cb = 0 - break
+                        let cb := 1
+
+                        // get the keccak hash to get the contents of the array
+                        mstore(0x0, _preBytes.slot)
+                        let sc := keccak256(0x0, 0x20)
+
+                        let mc := add(_postBytes, 0x20)
+                        let end := add(mc, mlength)
+
+                        // the next line is the loop condition:
+                        // while(uint(mc < end) + cb == 2)
+                        for {} eq(add(lt(mc, end), cb), 2) {
+                            sc := add(sc, 1)
+                            mc := add(mc, 0x20)
+                        } {
+                            if iszero(eq(sload(sc), mload(mc))) {
+                                // unsuccess:
+                                success := 0
+                                cb := 0
+                            }
+                        }
+                    }
+                }
+            }
+            default {
+                // unsuccess:
+                success := 0
+            }
+        }
+
+        return success;
+    }
+
+    /* @notice              Slice the _bytes from _start index till the result has length of _length
+                            Refer from https://github.com/summa-tx/bitcoin-spv/blob/master/solidity/contracts/BytesLib.sol#L246
+    *  @param _bytes        The original bytes needs to be sliced
+    *  @param _start        The index of _bytes for the start of sliced bytes
+    *  @param _length       The index of _bytes for the end of sliced bytes
+    *  @return              The sliced bytes
+    */
+    function slice(
+        bytes memory _bytes,
+        uint _start,
+        uint _length
+    )
+        internal
+        pure
+        returns (bytes memory)
+    {
+        require(_bytes.length >= (_start + _length));
+
+        bytes memory tempBytes;
+
+        assembly {
+            switch iszero(_length)
+            case 0 {
+                // Get a location of some free memory and store it in tempBytes as
+                // Solidity does for memory variables.
+                tempBytes := mload(0x40)
+
+                // The first word of the slice result is potentially a partial
+                // word read from the original array. To read it, we calculate
+                // the length of that partial word and start copying that many
+                // bytes into the array. The first word we copy will start with
+                // data we don't care about, but the last `lengthmod` bytes will
+                // land at the beginning of the contents of the new array. When
+                // we're done copying, we overwrite the full first word with
+                // the actual length of the slice.
+                // lengthmod <= _length % 32
+                let lengthmod := and(_length, 31)
+
+                // The multiplication in the next line is necessary
+                // because when slicing multiples of 32 bytes (lengthmod == 0)
+                // the following copy loop was copying the origin's length
+                // and then ending prematurely not copying everything it should.
+                let mc := add(add(tempBytes, lengthmod), mul(0x20, iszero(lengthmod)))
+                let end := add(mc, _length)
+
+                for {
+                    // The multiplication in the next line has the same exact purpose
+                    // as the one above.
+                    let cc := add(add(add(_bytes, lengthmod), mul(0x20, iszero(lengthmod))), _start)
+                } lt(mc, end) {
+                    mc := add(mc, 0x20)
+                    cc := add(cc, 0x20)
+                } {
+                    mstore(mc, mload(cc))
+                }
+
+                mstore(tempBytes, _length)
+
+                //update free-memory pointer
+                //allocating the array padded to 32 bytes like the compiler does now
+                mstore(0x40, and(add(mc, 31), not(31)))
+            }
+            //if we want a zero-length slice let's just return a zero-length array
+            default {
+                tempBytes := mload(0x40)
+
+                mstore(0x40, add(tempBytes, 0x20))
+            }
+        }
+
+        return tempBytes;
+    }
+    /* @notice              Check if the elements number of _signers within _keepers array is no less than _m
+    *  @param _keepers      The array consists of serveral address
+    *  @param _signers      Some specific addresses to be looked into
+    *  @param _m            The number requirement paramter
+    *  @return              True means containment, false meansdo do not contain.
+    */
+    function containMAddresses(address[] memory _keepers, address[] memory _signers, uint _m) internal pure returns (bool){
+        uint m = 0;
+        for(uint i = 0; i < _signers.length; i++){
+            for (uint j = 0; j < _keepers.length; j++) {
+                if (_signers[i] == _keepers[j]) {
+                    m++;
+                    delete _keepers[j];
+                }
+            }
+        }
+        return m >= _m;
+    }
+
+    /* @notice              TODO
+    *  @param key
+    *  @return
+    */
+    function compressMCPubKey(bytes memory key) internal pure returns (bytes memory newkey) {
+         require(key.length >= 67, "key lenggh is too short");
+         newkey = slice(key, 0, 35);
+         if (uint8(key[66]) % 2 == 0){
+             newkey[2] = bytes1(0x02);
+         } else {
+             newkey[2] = bytes1(0x03);
+         }
+         return newkey;
+    }
+
+    /**
+     * @dev Returns true if `account` is a contract.
+     *      Refer from https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/Address.sol#L18
+     *
+     * This test is non-exhaustive, and there may be false-negatives: during the
+     * execution of a contract's constructor, its address will be reported as
+     * not containing a contract.
+     *
+     * IMPORTANT: It is unsafe to assume that an address for which this
+     * function returns false is an externally-owned account (EOA) and not a
+     * contract.
+     */
+    function isContract(address account) internal view returns (bool) {
+        // This method relies in extcodesize, which returns 0 for contracts in
+        // construction, since the code is only stored at the end of the
+        // constructor execution.
+
+        // According to EIP-1052, 0x0 is the value returned for not-yet created accounts
+        // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
+        // for accounts without code, i.e. `keccak256('')`
+        bytes32 codehash;
+        bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
+        // solhint-disable-next-line no-inline-assembly
+        assembly { codehash := extcodehash(account) }
+        return (codehash != 0x0 && codehash != accountHash);
+    }
+}
+
+// File: contracts/libs/math/SafeMath.sol
+
+
+
+/**
+ * @dev Wrappers over Solidity's arithmetic operations with added overflow
+ * checks.
+ *
+ * Arithmetic operations in Solidity wrap on overflow. This can easily result
+ * in bugs, because programmers usually assume that an overflow raises an
+ * error, which is the standard behavior in high level programming languages.
+ * `SafeMath` restores this intuition by reverting the transaction when an
+ * operation overflows.
+ *
+ * Using this library instead of the unchecked operations eliminates an entire
+ * class of bugs, so it's recommended to use it always.
+ */
+library SafeMath {
+    /**
+     * @dev Returns the addition of two unsigned integers, reverting on
+     * overflow.
+     *
+     * Counterpart to Solidity's `+` operator.
+     *
+     * Requirements:
+     * - Addition cannot overflow.
+     */
+    function add(uint256 a, uint256 b) internal pure returns (uint256) {
+        uint256 c = a + b;
+        require(c >= a, "SafeMath: addition overflow");
+
+        return c;
+    }
+
+    /**
+     * @dev Returns the subtraction of two unsigned integers, reverting on
+     * overflow (when the result is negative).
+     *
+     * Counterpart to Solidity's `-` operator.
+     *
+     * Requirements:
+     * - Subtraction cannot overflow.
+     */
+    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
+        return sub(a, b, "SafeMath: subtraction overflow");
+    }
+
+    /**
+     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
+     * overflow (when the result is negative).
+     *
+     * Counterpart to Solidity's `-` operator.
+     *
+     * Requirements:
+     * - Subtraction cannot overflow.
+     */
+    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
+        require(b <= a, errorMessage);
+        uint256 c = a - b;
+
+        return c;
+    }
+
+    /**
+     * @dev Returns the multiplication of two unsigned integers, reverting on
+     * overflow.
+     *
+     * Counterpart to Solidity's `*` operator.
+     *
+     * Requirements:
+     * - Multiplication cannot overflow.
+     */
+    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
+        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
+        // benefit is lost if 'b' is also tested.
+        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
+        if (a == 0) {
+            return 0;
+        }
+
+        uint256 c = a * b;
+        require(c / a == b, "SafeMath: multiplication overflow");
+
+        return c;
+    }
+
+    /**
+     * @dev Returns the integer division of two unsigned integers. Reverts on
+     * division by zero. The result is rounded towards zero.
+     *
+     * Counterpart to Solidity's `/` operator. Note: this function uses a
+     * `revert` opcode (which leaves remaining gas untouched) while Solidity
+     * uses an invalid opcode to revert (consuming all remaining gas).
+     *
+     * Requirements:
+     * - The divisor cannot be zero.
+     */
+    function div(uint256 a, uint256 b) internal pure returns (uint256) {
+        return div(a, b, "SafeMath: division by zero");
+    }
+
+    /**
+     * @dev Returns the integer division of two unsigned integers. Reverts with custom message on
+     * division by zero. The result is rounded towards zero.
+     *
+     * Counterpart to Solidity's `/` operator. Note: this function uses a
+     * `revert` opcode (which leaves remaining gas untouched) while Solidity
+     * uses an invalid opcode to revert (consuming all remaining gas).
+     *
+     * Requirements:
+     * - The divisor cannot be zero.
+     */
+    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
+        // Solidity only automatically asserts when dividing by 0
+        require(b > 0, errorMessage);
+        uint256 c = a / b;
+        // assert(a == b * c + a % b); // There is no case in which this doesn't hold
+
+        return c;
+    }
+
+    /**
+     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
+     * Reverts when dividing by zero.
+     *
+     * Counterpart to Solidity's `%` operator. This function uses a `revert`
+     * opcode (which leaves remaining gas untouched) while Solidity uses an
+     * invalid opcode to revert (consuming all remaining gas).
+     *
+     * Requirements:
+     * - The divisor cannot be zero.
+     */
+    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
+        return mod(a, b, "SafeMath: modulo by zero");
+    }
+
+    /**
+     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
+     * Reverts with custom message when dividing by zero.
+     *
+     * Counterpart to Solidity's `%` operator. This function uses a `revert`
+     * opcode (which leaves remaining gas untouched) while Solidity uses an
+     * invalid opcode to revert (consuming all remaining gas).
+     *
+     * Requirements:
+     * - The divisor cannot be zero.
+     */
+    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
+        require(b != 0, errorMessage);
+        return a % b;
+    }
+}
+
+// File: contracts/Wallet.sol
+
+
+
+interface ERC20 {
+    function approve(address spender, uint256 amount) external returns (bool);
+    function transfer(address recipient, uint256 amount) external returns (bool);
+    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
+    function balanceOf(address account) external view returns (uint256);
+}
+
+/// @title The Wallet contract for Switcheo TradeHub
+/// @author Switcheo Network
+/// @notice This contract faciliates deposits for Switcheo TradeHub.
+/// @dev This contract is used together with the LockProxy contract to allow users
+/// to deposit funds without requiring them to have ETH
+contract Wallet {
+    bool public isInitialized;
+    address public creator;
+    address public owner;
+    bytes public swthAddress;
+
+    function initialize(address _owner, bytes calldata _swthAddress) external {
+        require(isInitialized == false, "Contract already initialized");
+        isInitialized = true;
+        creator = msg.sender;
+        owner = _owner;
+        swthAddress = _swthAddress;
+    }
+
+    /// @dev Allow this contract to receive Ethereum
+    receive() external payable {}
+
+    /// @dev Allow this contract to receive ERC223 tokens
+    // An empty implementation is required so that the ERC223 token will not
+    // throw an error on transfer
+    function tokenFallback(address, uint, bytes calldata) external {}
+
+    /// @dev send ETH from this contract to its creator
+    function sendETHToCreator(uint256 _amount) external {
+        require(msg.sender == creator, "Sender must be creator");
+        // we use `call` here following the recommendation from
+        // https://diligence.consensys.net/blog/2019/09/stop-using-soliditys-transfer-now/
+        (bool success,  ) = creator.call{value: _amount}("");
+        require(success, "Transfer failed");
+    }
+
+    /// @dev send tokens from this contract to its creator
+    function sendERC20ToCreator(address _assetId, uint256 _amount) external {
+        require(msg.sender == creator, "Sender must be creator");
+
+        ERC20 token = ERC20(_assetId);
+        _callOptionalReturn(
+            token,
+            abi.encodeWithSelector(
+                token.transfer.selector,
+                creator,
+                _amount
+            )
+        );
+    }
+
+    /**
+     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
+     * on the return value: the return value is optional (but if data is returned, it must not be false).
+     * @param token The token targeted by the call.
+     * @param data The call data (encoded using abi.encode or one of its variants).
+     */
+    function _callOptionalReturn(ERC20 token, bytes memory data) private {
+        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
+        // we're implementing it ourselves.
+
+        // A Solidity high level call has three parts:
+        //  1. The target address is checked to verify it contains contract code
+        //  2. The call itself is made, and success asserted
+        //  3. The return value is decoded, which in turn checks the size of the returned data.
+        // solhint-disable-next-line max-line-length
+        require(_isContract(address(token)), "SafeERC20: call to non-contract");
+
+        // solhint-disable-next-line avoid-low-level-calls
+        (bool success, bytes memory returndata) = address(token).call(data);
+        require(success, "SafeERC20: low-level call failed");
+
+        if (returndata.length > 0) { // Return data is optional
+            // solhint-disable-next-line max-line-length
+            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
+        }
+    }
+
+    /**
+     * @dev Returns true if `account` is a contract.
+     *
+     * [IMPORTANT]
+     * ====
+     * It is unsafe to assume that an address for which this function returns
+     * false is an externally-owned account (EOA) and not a contract.
+     *
+     * Among others, `_isContract` will return false for the following
+     * types of addresses:
+     *
+     *  - an externally-owned account
+     *  - a contract in construction
+     *  - an address where a contract will be created
+     *  - an address where a contract lived, but was destroyed
+     * ====
+     */
+    function _isContract(address account) private view returns (bool) {
+        // According to EIP-1052, 0x0 is the value returned for not-yet created accounts
+        // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
+        // for accounts without code, i.e. `keccak256('')`
+        bytes32 codehash;
+        bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
+        // solhint-disable-next-line no-inline-assembly
+        assembly { codehash := extcodehash(account) }
+        return (codehash != accountHash && codehash != 0x0);
+    }
+}
+
+// File: contracts/LockProxy.sol
+
+
+interface CCM {
+    function crossChain(uint64 _toChainId, bytes calldata _toContract, bytes calldata _method, bytes calldata _txData) external returns (bool);
+}
+
+interface CCMProxy {
+    function getEthCrossChainManager() external view returns (address);
+}
+
+/// @title The LockProxy contract for Switcheo TradeHub
+/// @author Switcheo Network
+/// @notice This contract faciliates deposits and withdrawals to Switcheo TradeHub.
+/// @dev The contract also allows for additional features in the future through "extension" contracts.
+contract TestingLockProxy is ReentrancyGuard {
+    using SafeMath for uint256;
+
+    // used for cross-chain addExtension and removeExtension methods
+    struct ExtensionTxArgs {
+        bytes extensionAddress;
+    }
+
+    // used for cross-chain registerAsset method
+    struct RegisterAssetTxArgs {
+        bytes assetHash;
+        bytes nativeAssetHash;
+    }
+
+    // used for cross-chain lock and unlock methods
+    struct TransferTxArgs {
+        bytes fromAssetHash;
+        bytes toAssetHash;
+        bytes toAddress;
+        uint256 amount;
+        uint256 feeAmount;
+        bytes feeAddress;
+        bytes fromAddress;
+        uint256 nonce;
+    }
+
+    // used to create a unique salt for wallet creation
+    bytes public constant SALT_PREFIX = "switcheo-eth-wallet-factory-v1";
+    address public constant ETH_ASSET_HASH = address(0);
+
+    CCMProxy public ccmProxy;
+    uint64 public counterpartChainId;
+    uint256 public currentNonce = 0;
+
+    // a mapping of assetHashes to the hash of
+    // (associated proxy address on Switcheo TradeHub, associated asset hash on Switcheo TradeHub)
+    mapping(address => bytes32) public registry;
+
+    // a record of signed messages to prevent replay attacks
+    mapping(bytes32 => bool) public seenMessages;
+
+    // a mapping of extension contracts
+    mapping(address => bool) public extensions;
+
+    // a record of created wallets
+    mapping(address => bool) public wallets;
+
+    event LockEvent(
+        address fromAssetHash,
+        address fromAddress,
+        uint64 toChainId,
+        bytes toAssetHash,
+        bytes toAddress,
+        bytes txArgs
+    );
+
+    event UnlockEvent(
+        address toAssetHash,
+        address toAddress,
+        uint256 amount,
+        bytes txArgs
+    );
+
+    constructor(address _ccmProxyAddress, uint64 _counterpartChainId) {
+        require(_counterpartChainId > 0, "counterpartChainId cannot be zero");
+        require(_ccmProxyAddress != address(0), "ccmProxyAddress cannot be empty");
+        counterpartChainId = _counterpartChainId;
+        ccmProxy = CCMProxy(_ccmProxyAddress);
+    }
+
+    modifier onlyManagerContract() {
+        require(
+            msg.sender == ccmProxy.getEthCrossChainManager(),
+            "msg.sender is not CCM"
+        );
+        _;
+    }
+
+    /// @dev Allow this contract to receive Ethereum
+    receive() external payable {}
+
+    /// @dev Allow this contract to receive ERC223 tokens
+    /// An empty implementation is required so that the ERC223 token will not
+    /// throw an error on transfer, this is specific to ERC223 tokens which
+    /// require this implementation, e.g. DGTX
+    function tokenFallback(address, uint, bytes calldata) external {}
+
+    /// @dev Calculate the wallet address for the given owner and Switcheo TradeHub address
+    /// @param _ownerAddress the Ethereum address which the user has control over, i.e. can sign msgs with
+    /// @param _swthAddress the hex value of the user's Switcheo TradeHub address
+    /// @param _bytecodeHash the hash of the wallet contract's bytecode
+    /// @return the wallet address
+    function getWalletAddress(
+        address _ownerAddress,
+        bytes calldata _swthAddress,
+        bytes32 _bytecodeHash
+    )
+        external
+        view
+        returns (address)
+    {
+        bytes32 salt = _getSalt(
+            _ownerAddress,
+            _swthAddress
+        );
+
+        bytes32 data = keccak256(
+            abi.encodePacked(bytes1(0xff), address(this), salt, _bytecodeHash)
+        );
+
+        return address(bytes20(data << 96));
+    }
+
+    /// @dev Create the wallet for the given owner and Switcheo TradeHub address
+    /// @param _ownerAddress the Ethereum address which the user has control over, i.e. can sign msgs with
+    /// @param _swthAddress the hex value of the user's Switcheo TradeHub address
+    /// @return true if success
+    function createWallet(
+        address _ownerAddress,
+        bytes calldata _swthAddress
+    )
+        external
+        nonReentrant
+        returns (bool)
+    {
+        require(_ownerAddress != address(0), "Empty ownerAddress");
+        require(_swthAddress.length != 0, "Empty swthAddress");
+
+        bytes32 salt = _getSalt(
+            _ownerAddress,
+            _swthAddress
+        );
+
+        Wallet wallet = new Wallet{salt: salt}();
+        wallet.initialize(_ownerAddress, _swthAddress);
+        wallets[address(wallet)] = true;
+
+        return true;
+    }
+
+    /// @dev Add a contract as an extension
+    /// @param _argsBz the serialized ExtensionTxArgs
+    /// @param _fromChainId the originating chainId
+    /// @return true if success
+    function addExtension(
+        bytes calldata _argsBz,
+        bytes calldata /* _fromContractAddr */,
+        uint64 _fromChainId
+    )
+        external
+        onlyManagerContract
+        nonReentrant
+        returns (bool)
+    {
+        require(_fromChainId == counterpartChainId, "Invalid chain ID");
+
+        ExtensionTxArgs memory args = _deserializeExtensionTxArgs(_argsBz);
+        address extensionAddress = Utils.bytesToAddress(args.extensionAddress);
+        extensions[extensionAddress] = true;
+
+        return true;
+    }
+
+    /// @dev Remove a contract from the extensions mapping
+    /// @param _argsBz the serialized ExtensionTxArgs
+    /// @param _fromChainId the originating chainId
+    /// @return true if success
+    function removeExtension(
+        bytes calldata _argsBz,
+        bytes calldata /* _fromContractAddr */,
+        uint64 _fromChainId
+    )
+        external
+        onlyManagerContract
+        nonReentrant
+        returns (bool)
+    {
+        require(_fromChainId == counterpartChainId, "Invalid chain ID");
+
+        ExtensionTxArgs memory args = _deserializeExtensionTxArgs(_argsBz);
+        address extensionAddress = Utils.bytesToAddress(args.extensionAddress);
+        extensions[extensionAddress] = false;
+
+        return true;
+    }
+
+    /// @dev Marks an asset as registered by mapping the asset's address to
+    /// the specified _fromContractAddr and assetHash on Switcheo TradeHub
+    /// @param _argsBz the serialized RegisterAssetTxArgs
+    /// @param _fromContractAddr the associated contract address on Switcheo TradeHub
+    /// @param _fromChainId the originating chainId
+    /// @return true if success
+    function registerAsset(
+        bytes calldata _argsBz,
+        bytes calldata _fromContractAddr,
+        uint64 _fromChainId
+    )
+        external
+        onlyManagerContract
+        nonReentrant
+        returns (bool)
+    {
+        require(_fromChainId == counterpartChainId, "Invalid chain ID");
+
+        RegisterAssetTxArgs memory args = _deserializeRegisterAssetTxArgs(_argsBz);
+        _markAssetAsRegistered(
+            Utils.bytesToAddress(args.nativeAssetHash),
+            _fromContractAddr,
+            args.assetHash
+        );
+
+        return true;
+    }
+
+    /// @dev Performs a deposit from a Wallet contract
+    /// @param _walletAddress address of the wallet contract, the wallet contract
+    /// does not receive ETH in this call, but _walletAddress still needs to be payable
+    /// since the wallet contract can receive ETH, there would be compile errors otherwise
+    /// @param _assetHash the asset to deposit
+    /// @param _targetProxyHash the associated proxy hash on Switcheo TradeHub
+    /// @param _toAssetHash the associated asset hash on Switcheo TradeHub
+    /// @param _feeAddress the hex version of the Switcheo TradeHub address to send the fee to
+    /// @param _values[0]: amount, the number of tokens to deposit
+    /// @param _values[1]: feeAmount, the number of tokens to be used as fees
+    /// @param _values[2]: nonce, to prevent replay attacks
+    /// @param _values[3]: callAmount, some tokens may burn an amount before transfer
+    /// so we allow a callAmount to support these tokens
+    /// @param _v: the v value of the wallet owner's signature
+    /// @param _rs: the r, s values of the wallet owner's signature
+    function lockFromWallet(
+        address payable _walletAddress,
+        address _assetHash,
+        bytes calldata _targetProxyHash,
+        bytes calldata _toAssetHash,
+        bytes calldata _feeAddress,
+        uint256[] calldata _values,
+        uint8 _v,
+        bytes32[] calldata _rs
+    )
+        external
+        nonReentrant
+        returns (bool)
+    {
+        require(wallets[_walletAddress], "Invalid wallet address");
+
+        Wallet wallet = Wallet(_walletAddress);
+        _validateLockFromWallet(
+            wallet.owner(),
+            _assetHash,
+            _targetProxyHash,
+            _toAssetHash,
+            _feeAddress,
+            _values,
+            _v,
+            _rs
+        );
+
+        // it is very important that this function validates the success of a transfer correctly
+        // since, once this line is passed, the deposit is assumed to be successful
+        // which will eventually result in the specified amount of tokens being minted for the
+        // wallet.swthAddress on Switcheo TradeHub
+        _transferInFromWallet(_walletAddress, _assetHash, _values[0], _values[3]);
+
+        _lock(
+            _assetHash,
+            _targetProxyHash,
+            _toAssetHash,
+            wallet.swthAddress(),
+            _values[0],
+            _values[1],
+            _feeAddress
+        );
+
+        return true;
+    }
+
+    /// @dev Performs a deposit
+    /// @param _assetHash the asset to deposit
+    /// @param _targetProxyHash the associated proxy hash on Switcheo TradeHub
+    /// @param _toAddress the hex version of the Switcheo TradeHub address to deposit to
+    /// @param _toAssetHash the associated asset hash on Switcheo TradeHub
+    /// @param _feeAddress the hex version of the Switcheo TradeHub address to send the fee to
+    /// @param _values[0]: amount, the number of tokens to deposit
+    /// @param _values[1]: feeAmount, the number of tokens to be used as fees
+    /// @param _values[2]: callAmount, some tokens may burn an amount before transfer
+    /// so we allow a callAmount to support these tokens
+    function lock(
+        address _assetHash,
+        bytes calldata _targetProxyHash,
+        bytes calldata _toAddress,
+        bytes calldata _toAssetHash,
+        bytes calldata _feeAddress,
+        uint256[] calldata _values
+    )
+        external
+        payable
+        nonReentrant
+        returns (bool)
+    {
+
+        // it is very important that this function validates the success of a transfer correctly
+        // since, once this line is passed, the deposit is assumed to be successful
+        // which will eventually result in the specified amount of tokens being minted for the
+        // _toAddress on Switcheo TradeHub
+        _transferIn(_assetHash, _values[0], _values[2]);
+
+        _lock(
+            _assetHash,
+            _targetProxyHash,
+            _toAssetHash,
+            _toAddress,
+            _values[0],
+            _values[1],
+            _feeAddress
+        );
+
+        return true;
+    }
+
+    /// @dev Performs a withdrawal that was initiated on Switcheo TradeHub
+    /// @param _argsBz the serialized TransferTxArgs
+    /// @param _fromContractAddr the associated contract address on Switcheo TradeHub
+    /// @param _fromChainId the originating chainId
+    /// @return true if success
+    function unlock(
+        bytes calldata _argsBz,
+        bytes calldata _fromContractAddr,
+        uint64 _fromChainId
+    )
+        external
+        onlyManagerContract
+        nonReentrant
+        returns (bool)
+    {
+        require(_fromChainId == counterpartChainId, "Invalid chain ID");
+
+        TransferTxArgs memory args = _deserializeTransferTxArgs(_argsBz);
+        require(args.fromAssetHash.length > 0, "Invalid fromAssetHash");
+        require(args.toAssetHash.length == 20, "Invalid toAssetHash");
+
+        address toAssetHash = Utils.bytesToAddress(args.toAssetHash);
+        address toAddress = Utils.bytesToAddress(args.toAddress);
+
+        _validateAssetRegistration(toAssetHash, _fromContractAddr, args.fromAssetHash);
+        _transferOut(toAddress, toAssetHash, args.amount);
+
+        emit UnlockEvent(toAssetHash, toAddress, args.amount, _argsBz);
+        return true;
+    }
+
+    /// @dev Performs a transfer of funds, this is only callable by approved extension contracts
+    /// the `nonReentrant` guard is intentionally not added to this function, to allow for more flexibility.
+    /// The calling contract should be secure and have its own `nonReentrant` guard as needed.
+    /// @param _receivingAddress the address to transfer to
+    /// @param _assetHash the asset to transfer
+    /// @param _amount the amount to transfer
+    /// @return true if success
+    function extensionTransfer(
+        address _receivingAddress,
+        address _assetHash,
+        uint256 _amount
+    )
+        external
+        returns (bool)
+    {
+        require(
+            extensions[msg.sender] == true,
+            "Invalid extension"
+        );
+
+        if (_assetHash == ETH_ASSET_HASH) {
+            // we use `call` here since the _receivingAddress could be a contract
+            // see https://diligence.consensys.net/blog/2019/09/stop-using-soliditys-transfer-now/
+            // for more info
+            (bool success,  ) = _receivingAddress.call{value: _amount}("");
+            require(success, "Transfer failed");
+            return true;
+        }
+
+        ERC20 token = ERC20(_assetHash);
+        _callOptionalReturn(
+            token,
+            abi.encodeWithSelector(
+                token.approve.selector,
+                _receivingAddress,
+                _amount
+            )
+        );
+
+        return true;
+    }
+
+    /// @dev Marks an asset as registered by associating it to a specified Switcheo TradeHub proxy and asset hash
+    /// @param _assetHash the address of the asset to mark
+    /// @param _proxyAddress the associated proxy address on Switcheo TradeHub
+    /// @param _toAssetHash the associated asset hash on Switcheo TradeHub
+    function _markAssetAsRegistered(
+        address _assetHash,
+        bytes memory _proxyAddress,
+        bytes memory _toAssetHash
+    )
+        private
+    {
+        require(_proxyAddress.length == 20, "Invalid proxyAddress");
+        require(
+            registry[_assetHash] == bytes32(0),
+            "Asset already registered"
+        );
+
+        bytes32 value = keccak256(abi.encodePacked(
+            _proxyAddress,
+            _toAssetHash
+        ));
+
+        registry[_assetHash] = value;
+    }
+
+    /// @dev Validates that an asset's registration matches the given params
+    /// @param _assetHash the address of the asset to check
+    /// @param _proxyAddress the expected proxy address on Switcheo TradeHub
+    /// @param _toAssetHash the expected asset hash on Switcheo TradeHub
+    function _validateAssetRegistration(
+        address _assetHash,
+        bytes memory _proxyAddress,
+        bytes memory _toAssetHash
+    )
+        private
+        view
+    {
+        require(_proxyAddress.length == 20, "Invalid proxyAddress");
+        bytes32 value = keccak256(abi.encodePacked(
+            _proxyAddress,
+            _toAssetHash
+        ));
+        require(registry[_assetHash] == value, "Asset not registered");
+    }
+
+    /// @dev validates the asset registration and calls the CCM contract
+    function _lock(
+        address _fromAssetHash,
+        bytes memory _targetProxyHash,
+        bytes memory _toAssetHash,
+        bytes memory _toAddress,
+        uint256 _amount,
+        uint256 _feeAmount,
+        bytes memory _feeAddress
+    )
+        private
+    {
+        require(_targetProxyHash.length == 20, "Invalid targetProxyHash");
+        require(_toAssetHash.length > 0, "Empty toAssetHash");
+        require(_toAddress.length > 0, "Empty toAddress");
+        require(_amount > 0, "Amount must be more than zero");
+        require(_feeAmount < _amount, "Fee amount cannot be greater than amount");
+
+        _validateAssetRegistration(_fromAssetHash, _targetProxyHash, _toAssetHash);
+
+        TransferTxArgs memory txArgs = TransferTxArgs({
+            fromAssetHash: Utils.addressToBytes(_fromAssetHash),
+            toAssetHash: _toAssetHash,
+            toAddress: _toAddress,
+            amount: _amount,
+            feeAmount: _feeAmount,
+            feeAddress: _feeAddress,
+            fromAddress: abi.encodePacked(msg.sender),
+            nonce: _getNextNonce()
+        });
+
+        bytes memory txData = _serializeTransferTxArgs(txArgs);
+        CCM ccm = _getCcm();
+        require(
+            ccm.crossChain(counterpartChainId, _targetProxyHash, "unlock", txData),
+            "EthCrossChainManager crossChain executed error!"
+        );
+
+        emit LockEvent(_fromAssetHash, msg.sender, counterpartChainId, _toAssetHash, _toAddress, txData);
+    }
+
+    /// @dev validate the signature for lockFromWallet
+    function _validateLockFromWallet(
+        address _walletOwner,
+        address _assetHash,
+        bytes memory _targetProxyHash,
+        bytes memory _toAssetHash,
+        bytes memory _feeAddress,
+        uint256[] memory _values,
+        uint8 _v,
+        bytes32[] memory _rs
+    )
+        private
+    {
+        bytes32 message = keccak256(abi.encodePacked(
+            "sendTokens",
+            _assetHash,
+            _targetProxyHash,
+            _toAssetHash,
+            _feeAddress,
+            _values[0],
+            _values[1],
+            _values[2]
+        ));
+
+        require(seenMessages[message] == false, "Message already seen");
+        seenMessages[message] = true;
+        _validateSignature(message, _walletOwner, _v, _rs[0], _rs[1]);
+    }
+
+    /// @dev transfers funds from a Wallet contract into this contract
+    /// the difference between this contract's before and after balance must equal _amount
+    /// this is assumed to be sufficient in ensuring that the expected amount
+    /// of funds were transferred in
+    function _transferInFromWallet(
+        address payable _walletAddress,
+        address _assetHash,
+        uint256 _amount,
+        uint256 _callAmount
+    )
+        private
+    {
+        Wallet wallet = Wallet(_walletAddress);
+        if (_assetHash == ETH_ASSET_HASH) {
+            uint256 before = address(this).balance;
+
+            wallet.sendETHToCreator(_callAmount);
+
+            uint256 transferred = address(this).balance.sub(before);
+            require(transferred == _amount, "ETH transferred does not match the expected amount");
+            return;
+        }
+
+        ERC20 token = ERC20(_assetHash);
+        {
+          uint256 before = token.balanceOf(address(this));
+
+          wallet.sendERC20ToCreator(_assetHash, _callAmount);
+
+          uint256 transferred = token.balanceOf(address(this)).sub(before);
+          require(transferred == _amount, "Tokens transferred does not match the expected amount");
+        }
+    }
+
+    /// @dev transfers funds from an address into this contract
+    /// for ETH transfers, we only check that msg.value == _amount, and _callAmount is ignored
+    /// for token transfers, the difference between this contract's before and after balance must equal _amount
+    /// these checks are assumed to be sufficient in ensuring that the expected amount
+    /// of funds were transferred in
+    function _transferIn(
+        address _assetHash,
+        uint256 _amount,
+        uint256 _callAmount
+    )
+        private
+    {
+        if (_assetHash == ETH_ASSET_HASH) {
+            require(msg.value == _amount, "ETH transferred does not match the expected amount");
+            return;
+        }
+
+        ERC20 token = ERC20(_assetHash);
+        uint256 before = token.balanceOf(address(this));
+        _callOptionalReturn(
+            token,
+            abi.encodeWithSelector(
+                token.transferFrom.selector,
+                msg.sender,
+                address(this),
+                _callAmount
+            )
+        );
+        uint256 transferred = token.balanceOf(address(this)).sub(before);
+        require(transferred == _amount, "Tokens transferred does not match the expected amount");
+    }
+
+    /// @dev transfers funds from this contract to the _toAddress
+    function _transferOut(
+        address _toAddress,
+        address _assetHash,
+        uint256 _amount
+    )
+        private
+    {
+        if (_assetHash == ETH_ASSET_HASH) {
+            // we use `call` here since the _receivingAddress could be a contract
+            // see https://diligence.consensys.net/blog/2019/09/stop-using-soliditys-transfer-now/
+            // for more info
+            (bool success,  ) = _toAddress.call{value: _amount}("");
+            require(success, "Transfer failed");
+            return;
+        }
+
+        ERC20 token = ERC20(_assetHash);
+        _callOptionalReturn(
+            token,
+            abi.encodeWithSelector(
+                token.transfer.selector,
+                _toAddress,
+                _amount
+            )
+        );
+    }
+
+    /// @dev validates a signature against the specified user address
+    function _validateSignature(
+        bytes32 _message,
+        address _user,
+        uint8 _v,
+        bytes32 _r,
+        bytes32 _s
+    )
+        private
+        pure
+    {
+        bytes32 prefixedMessage = keccak256(abi.encodePacked(
+            "\x19Ethereum Signed Message:\n32",
+            _message
+        ));
+
+        require(
+            _user == ecrecover(prefixedMessage, _v, _r, _s),
+            "Invalid signature"
+        );
+    }
+
+    function _serializeTransferTxArgs(TransferTxArgs memory args) private pure returns (bytes memory) {
+        bytes memory buff;
+        buff = abi.encodePacked(
+            ZeroCopySink.WriteVarBytes(args.fromAssetHash),
+            ZeroCopySink.WriteVarBytes(args.toAssetHash),
+            ZeroCopySink.WriteVarBytes(args.toAddress),
+            ZeroCopySink.WriteUint255(args.amount),
+            ZeroCopySink.WriteUint255(args.feeAmount),
+            ZeroCopySink.WriteVarBytes(args.feeAddress),
+            ZeroCopySink.WriteVarBytes(args.fromAddress),
+            ZeroCopySink.WriteUint255(args.nonce)
+        );
+        return buff;
+    }
+
+    function _deserializeTransferTxArgs(bytes memory valueBz) private pure returns (TransferTxArgs memory) {
+        TransferTxArgs memory args;
+        uint256 off = 0;
+        (args.fromAssetHash, off) = ZeroCopySource.NextVarBytes(valueBz, off);
+        (args.toAssetHash, off) = ZeroCopySource.NextVarBytes(valueBz, off);
+        (args.toAddress, off) = ZeroCopySource.NextVarBytes(valueBz, off);
+        (args.amount, off) = ZeroCopySource.NextUint255(valueBz, off);
+        return args;
+    }
+
+    function _deserializeRegisterAssetTxArgs(bytes memory valueBz) private pure returns (RegisterAssetTxArgs memory) {
+        RegisterAssetTxArgs memory args;
+        uint256 off = 0;
+        (args.assetHash, off) = ZeroCopySource.NextVarBytes(valueBz, off);
+        (args.nativeAssetHash, off) = ZeroCopySource.NextVarBytes(valueBz, off);
+        return args;
+    }
+
+    function _deserializeExtensionTxArgs(bytes memory valueBz) private pure returns (ExtensionTxArgs memory) {
+        ExtensionTxArgs memory args;
+        uint256 off = 0;
+        (args.extensionAddress, off) = ZeroCopySource.NextVarBytes(valueBz, off);
+        return args;
+    }
+
+    function _getCcm() private view returns (CCM) {
+      CCM ccm = CCM(ccmProxy.getEthCrossChainManager());
+      return ccm;
+    }
+
+    function _getNextNonce() private returns (uint256) {
+      currentNonce = currentNonce.add(1);
+      return currentNonce;
+    }
+
+    function _getSalt(
+        address _ownerAddress,
+        bytes memory _swthAddress
+    )
+        private
+        pure
+        returns (bytes32)
+    {
+        return keccak256(abi.encodePacked(
+            SALT_PREFIX,
+            _ownerAddress,
+            _swthAddress
+        ));
+    }
+
+
+    /**
+     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
+     * on the return value: the return value is optional (but if data is returned, it must not be false).
+     * @param token The token targeted by the call.
+     * @param data The call data (encoded using abi.encode or one of its variants).
+     */
+    function _callOptionalReturn(ERC20 token, bytes memory data) private {
+        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
+        // we're implementing it ourselves.
+
+        // A Solidity high level call has three parts:
+        //  1. The target address is checked to verify it contains contract code
+        //  2. The call itself is made, and success asserted
+        //  3. The return value is decoded, which in turn checks the size of the returned data.
+        // solhint-disable-next-line max-line-length
+        require(_isContract(address(token)), "SafeERC20: call to non-contract");
+
+        // solhint-disable-next-line avoid-low-level-calls
+        (bool success, bytes memory returndata) = address(token).call(data);
+        require(success, "SafeERC20: low-level call failed");
+
+        if (returndata.length > 0) { // Return data is optional
+            // solhint-disable-next-line max-line-length
+            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
+        }
+    }
+
+    /**
+     * @dev Returns true if `account` is a contract.
+     *
+     * [IMPORTANT]
+     * ====
+     * It is unsafe to assume that an address for which this function returns
+     * false is an externally-owned account (EOA) and not a contract.
+     *
+     * Among others, `_isContract` will return false for the following
+     * types of addresses:
+     *
+     *  - an externally-owned account
+     *  - a contract in construction
+     *  - an address where a contract will be created
+     *  - an address where a contract lived, but was destroyed
+     * ====
+     */
+    function _isContract(address account) private view returns (bool) {
+        // According to EIP-1052, 0x0 is the value returned for not-yet created accounts
+        // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
+        // for accounts without code, i.e. `keccak256('')`
+        bytes32 codehash;
+        bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
+        // solhint-disable-next-line no-inline-assembly
+        assembly { codehash := extcodehash(account) }
+        return (codehash != accountHash && codehash != 0x0);
+    }
+
+  function mock_transferIn(address assetHash, uint256 amount, uint callAmount) public payable {
+    _transferIn(assetHash, amount, callAmount);
+  }
+
+  function mock_transferOut(address toAddress, address assetHash, uint amount) public {
+    _transferOut(toAddress, assetHash, amount);
+  }
+}
diff --git a/smart-contracts/test/zilbridge/TokenManagerDeployers/LockProxyTokenManagerDeployer.sol b/smart-contracts/test/zilbridge/TokenManagerDeployers/LockProxyTokenManagerDeployer.sol
new file mode 100644
index 0000000..ac3c784
--- /dev/null
+++ b/smart-contracts/test/zilbridge/TokenManagerDeployers/LockProxyTokenManagerDeployer.sol
@@ -0,0 +1,34 @@
+// SPDX-License-Identifier: MIT OR Apache-2.0
+pragma solidity 0.8.20;
+
+import {ERC1967Proxy} from "@openzeppelin/contracts/proxy/ERC1967/ERC1967Proxy.sol";
+import {LockProxyTokenManagerUpgradeableV3} from "contracts/periphery/TokenManagerV3/LockProxyTokenManagerUpgradeableV3.sol";
+import {LockProxyTokenManagerUpgradeable} from "contracts/periphery/LockProxyTokenManagerUpgradeable.sol";
+
+abstract contract LockProxyTokenManagerDeployer {
+
+  // This is rather spurious, but serves to prove (albeit lightly!) that we could upgrade if we wanted to.
+  function deployLockProxyTokenManagerUpgradeable(address chainGateway, address lockProxyAddress) public returns (LockProxyTokenManagerUpgradeable) {
+    address implementation = address(new LockProxyTokenManagerUpgradeable());
+    // Deploy proxy and attach our initial implementation.
+    address proxy = address(
+        new ERC1967Proxy(implementation, abi.encodeCall(LockProxyTokenManagerUpgradeable.initialize, (chainGateway, lockProxyAddress))));
+    return LockProxyTokenManagerUpgradeable(proxy);
+  }
+
+  function deployLockProxyTokenManagerV3(
+      address chainGateway,
+      address lockProxyAddress,
+      uint fees) public returns (LockProxyTokenManagerUpgradeableV3) {
+    LockProxyTokenManagerUpgradeable proxy = deployLockProxyTokenManagerUpgradeable(chainGateway, lockProxyAddress);
+    address newImplementation = address(new LockProxyTokenManagerUpgradeableV3());
+    bytes memory encodedInitializerCall = abi.encodeCall(
+        LockProxyTokenManagerUpgradeableV3.reinitialize, fees);
+    proxy.upgradeToAndCall(newImplementation, encodedInitializerCall);
+    return LockProxyTokenManagerUpgradeableV3(address(proxy));
+  }
+
+  function deployLatestLockProxyTokenManager(address chainGateway, address lockProxy, uint fees) public returns (LockProxyTokenManagerUpgradeableV3) {
+    return deployLockProxyTokenManagerV3(chainGateway, lockProxy, fees);
+  }
+}
diff --git a/smart-contracts/test/zilbridge/ZilBridgeTokenBridge.compat.t.sol b/smart-contracts/test/zilbridge/ZilBridgeTokenBridge.compat.t.sol
new file mode 100644
index 0000000..8657cfb
--- /dev/null
+++ b/smart-contracts/test/zilbridge/ZilBridgeTokenBridge.compat.t.sol
@@ -0,0 +1,224 @@
+// SPDX-License-Identifier: MIT OR Apache-2.0
+pragma solidity 0.8.20;
+
+import "forge-std/console.sol";
+import {Tester, Vm} from "test/Tester.sol";
+import {ITokenManagerStructs, TokenManagerUpgradeable} from "contracts/periphery/TokenManagerUpgradeable.sol";
+import {LockAndReleaseTokenManagerUpgradeableV3} from "contracts/periphery/TokenManagerV3/LockAndReleaseTokenManagerUpgradeableV3.sol";
+import {MintAndBurnTokenManagerUpgradeableV3} from "contracts/periphery/TokenManagerV3/MintAndBurnTokenManagerUpgradeableV3.sol";
+import {BridgedToken} from "contracts/periphery/BridgedToken.sol";
+import {CallMetadata, IRelayerEvents} from "contracts/core/Relayer.sol";
+import {ValidatorManager} from "contracts/core/ValidatorManager.sol";
+import {ChainGateway} from "contracts/core/ChainGateway.sol";
+import {MessageHashUtils} from "@openzeppelin/contracts/utils/cryptography/MessageHashUtils.sol";
+import {TestToken} from "test/Helpers.sol";
+import {LockProxyTokenManagerUpgradeableV3} from "contracts/periphery/TokenManagerV3/LockProxyTokenManagerUpgradeableV3.sol";
+import {LockProxyTokenManagerDeployer} from "test/zilbridge/TokenManagerDeployers/LockProxyTokenManagerDeployer.sol";
+import {MintAndBurnTokenManagerDeployer} from "test/periphery/TokenManagerDeployers/MintAndBurnTokenManagerDeployer.sol";
+import {LockAndReleaseTokenManagerDeployer} from "test/periphery/TokenManagerDeployers/LockAndReleaseTokenManagerDeployer.sol";
+import { SwitcheoToken } from "test/zilbridge/tokens/switcheo/tokens/SwitcheoTokenETH.sol";
+import { ZilBridgeFixture } from "test/zilbridge/DeployZilBridge.t.sol";
+import { MockLockProxy } from "./MockLockProxy.sol";
+import { ZilBridgeTokenBridgeIntegrationFixture } from "./ZilBridgeTokenIntegrationFixture.t.sol";
+import { IERC20 } from "openzeppelin-contracts/contracts/interfaces/IERC20.sol";
+
+/*** @notice provides utility routines for the compatibility tests. These are very similar to the
+ * orutines in the integration tests.
+ */
+contract ZilBridgeTokenBridgeCompatibilityFixture is ZilBridgeTokenBridgeIntegrationFixture {
+  using MessageHashUtils for bytes;
+
+  /// @notice send amount wrapped tokens to the remote user.
+  function transferToRemoteUser(address sourceToken_, address remoteToken_,
+                                            address sourceUser_, address remoteUser_, uint256 amount_) public {
+    startHoax(sourceUser_);
+    uint sourceChainId_ = block.chainid;
+    uint remoteChainId_ = block.chainid;
+    uint valueToSend = fees;
+    uint sourceBalance;
+    if (sourceToken_ == address(0)) {
+      // Check for native
+      assertGe(sourceUser_.balance, amount_);
+      sourceBalance = sourceUser_.balance;
+      valueToSend += amount_;
+    } else {
+      // Check that the source user has the funds.
+      sourceBalance = IERC20(sourceToken_).balanceOf(sourceUser_);
+      assertGe(sourceBalance, amount_);
+      // Set up an allowance
+      IERC20(sourceToken_).approve(address(sourceTokenManager), amount_);
+    }
+    uint remoteBalance;
+    if (remoteToken_ == address(0)) {
+      remoteBalance = remoteUser_.balance;
+    } else {
+      remoteBalance = IERC20(remoteToken_).balanceOf(remoteUser_);
+    }
+
+    bytes memory data = abi.encodeWithSelector(
+        TokenManagerUpgradeable.accept.selector,
+        // From
+        CallMetadata(sourceChainId_, address(sourceTokenManager)),
+        // To
+        abi.encode(ITokenManagerStructs.AcceptArgs(address(remoteToken_), remoteUser_, amount_)));
+
+    vm.expectEmit(address(sourceChainGateway));
+    emit IRelayerEvents.Relayed(remoteChainId_,
+                                address(remoteTokenManager), data, 1_000_000, 0);
+    sourceTokenManager.transfer{value: valueToSend} (
+        address(sourceToken_), remoteChainId_, remoteUser_, amount_);
+    vm.startPrank(validator);
+    bytes[] memory signatures = new bytes[](1);
+    signatures[0] = sign(validatorWallet, abi.encode(sourceChainId_, remoteChainId_,
+                                                     address(remoteTokenManager), data,
+                                                     1_000_000, 0)
+                         .toEthSignedMessageHash());
+    remoteChainGateway.dispatch(sourceChainId_,
+                                address(remoteTokenManager),
+                                data, 1_000_000, 0, signatures);
+    if (remoteToken_ == address(0)) {
+      assertGe(remoteUser_.balance, remoteBalance + amount_);
+    } else {
+      assertEq(IERC20(remoteToken_).balanceOf(remoteUser_), remoteBalance + amount_);
+    }
+    if (sourceToken_ == address(0)) {
+      assertLe(sourceUser_.balance, sourceBalance - amount_);
+    } else {
+      assertEq(IERC20(sourceToken_).balanceOf(sourceUser_), sourceBalance - amount_);
+    }
+  }
+
+  /// @notice send amount wrapped tokens to a source user.
+  function transferFromRemoteUser(address sourceToken_, address remoteToken_,
+                                            address sourceUser_, address remoteUser_, uint256 amount_) public {
+    startHoax(remoteUser_);
+    uint sourceChainId_ = block.chainid;
+    uint remoteChainId_ = block.chainid;
+    uint valueToSend = fees;
+    uint remoteBalance;
+    if (remoteToken_ == address(0)) {
+      // Check for native
+      assertGe(remoteUser_.balance, amount_);
+      remoteBalance = remoteUser_.balance;
+      valueToSend += amount_;
+    } else {
+      // Check that the source user has the funds.
+      remoteBalance = IERC20(remoteToken_).balanceOf(remoteUser_);
+      assertGe(remoteBalance, amount_);
+      // Set up an allowance
+      IERC20(remoteToken_).approve(address(remoteTokenManager), amount_);
+    }
+    uint sourceBalance;
+    if (sourceToken_ == address(0)) {
+      sourceBalance = sourceUser_.balance;
+    } else {
+      sourceBalance = IERC20(sourceToken_).balanceOf(sourceUser_);
+    }
+
+    bytes memory data = abi.encodeWithSelector(
+        TokenManagerUpgradeable.accept.selector,
+        // From
+        CallMetadata(remoteChainId_, address(remoteTokenManager)),
+        // To
+        abi.encode(ITokenManagerStructs.AcceptArgs(address(sourceToken_), sourceUser_, amount_)));
+
+    vm.expectEmit(address(remoteChainGateway));
+    emit IRelayerEvents.Relayed(sourceChainId_,
+                                address(sourceTokenManager), data, 1_000_000, 0);
+    remoteTokenManager.transfer{value: valueToSend} (
+        address(remoteToken_), sourceChainId_, sourceUser_, amount_);
+    vm.startPrank(validator);
+    bytes[] memory signatures = new bytes[](1);
+    signatures[0] = sign(validatorWallet, abi.encode(remoteChainId_, sourceChainId_,
+                                                     address(sourceTokenManager), data,
+                                                     1_000_000, 0)
+                         .toEthSignedMessageHash());
+    sourceChainGateway.dispatch(remoteChainId_,
+                                address(sourceTokenManager),
+                                data, 1_000_000, 0, signatures);
+    if (sourceToken_ == address(0)) {
+      assertGe(sourceUser_.balance, sourceBalance + amount_);
+    } else {
+      assertEq(IERC20(sourceToken_).balanceOf(sourceUser_), sourceBalance + amount_);
+    }
+    if (remoteToken_ == address(0)) {
+      assertLe(remoteUser_.balance, remoteBalance - amount_);
+    } else {
+      assertEq(IERC20(remoteToken_).balanceOf(remoteUser_), remoteBalance - amount_);
+    }
+  }
+
+}
+
+/// @title Test that assets bridged via ZilBridge can be recovered via XBridge
+/// @author rrw
+/*** @notice This test is a replica of ZilBridgeTokenBridgeIntegrationTest which bridges assets that we fake up
+ * ( via MockLockProxy ) to have been locked by the original zilBridge, to prove that we can recover
+ * them via XBridge.
+ */
+contract ZilBridgeTokenBridgeCompatibilityTest is ZilBridgeTokenBridgeCompatibilityFixture {
+  using MessageHashUtils for bytes;
+
+  function setUp() external {
+    installContracts();
+  }
+
+  function test_wrappedCompatibilityForward() external {
+    // Get an amount
+    uint256 amount = originalTokenSupply;
+    // Transfer it synthetically to the lock proxy at the source end.
+    startHoax(sourceUser);
+    nativelyOnSource.approve(address(lockProxy), amount);
+    lockProxy.mock_transferIn(address(nativelyOnSource), amount, amount);
+
+    // Use the mock lock proxy to simulate transferring that to the remote user.
+    mockRemoteLockProxy.mock_transferOut(remoteUser, address(remoteNativelyOnSource), amount);
+
+    assertEq(remoteNativelyOnSource.balanceOf(remoteUser), amount);
+    assertEq(nativelyOnSource.balanceOf(sourceUser), 0);
+    assertEq(nativelyOnSource.balanceOf(address(lockProxy)), amount);
+
+    // OK. Now transfer it back again.
+    transferFromRemoteUser(address(nativelyOnSource), address(remoteNativelyOnSource),
+                           sourceUser, remoteUser, amount);
+  }
+
+  function test_wrappedCompatibilityNative() external {
+    // Get am amount
+    uint256 amount = originalTokenSupply; 
+    startHoax(sourceUser);
+    uint256 gas = 1 ether;
+    vm.deal(sourceUser, amount + gas);
+
+    uint256 sourceBalance = sourceUser.balance;
+    uint256 lockBalance = address(lockProxy).balance;
+    lockProxy.mock_transferIn{value: originalTokenSupply}(address(0), amount, amount);
+    mockRemoteLockProxy.mock_transferOut(remoteUser, address(remoteBridgedGasToken), amount);
+
+    assertEq(remoteBridgedGasToken.balanceOf(remoteUser), amount);
+    assertLe(sourceUser.balance, sourceBalance - amount);
+    assertEq(address(lockProxy).balance, lockBalance + amount);
+
+    // OK. Now transfer it back again.
+    transferFromRemoteUser(address(0), address(remoteBridgedGasToken),
+                           sourceUser, remoteUser, amount);
+  }
+
+  function test_wrappedCompatibilityBackward() external {
+    // Get an amount
+    uint256 amount = originalTokenSupply;
+    // Transfer it synthetically to the lock proxy at the remote
+    startHoax(remoteUser);
+    nativelyOnRemote.approve(address(mockRemoteLockProxy), amount);
+    mockRemoteLockProxy.mock_transferIn(address(nativelyOnRemote), amount, amount);
+    lockProxy.mock_transferOut(sourceUser, address(sourceNativelyOnRemote), amount);
+
+    assertEq(sourceNativelyOnRemote.balanceOf(sourceUser), amount);
+    assertEq(nativelyOnRemote.balanceOf(remoteUser), 0);
+    assertEq(nativelyOnRemote.balanceOf(address(mockRemoteLockProxy)), amount);
+
+    // Now transfer it back again
+    transferToRemoteUser(address(sourceNativelyOnRemote), address(nativelyOnRemote),
+                         sourceUser, remoteUser, originalTokenSupply);
+  }
+}
diff --git a/smart-contracts/test/zilbridge/ZilBridgeTokenBridge.integration.t.sol b/smart-contracts/test/zilbridge/ZilBridgeTokenBridge.integration.t.sol
new file mode 100644
index 0000000..2c821da
--- /dev/null
+++ b/smart-contracts/test/zilbridge/ZilBridgeTokenBridge.integration.t.sol
@@ -0,0 +1,240 @@
+// SPDX-License-Identifier: MIT OR Apache-2.0
+pragma solidity 0.8.20;
+
+import "forge-std/console.sol";
+import {Tester, Vm} from "test/Tester.sol";
+import {ITokenManagerStructs, TokenManagerUpgradeable} from "contracts/periphery/TokenManagerUpgradeable.sol";
+import {LockAndReleaseTokenManagerUpgradeableV3} from "contracts/periphery/TokenManagerV3/LockAndReleaseTokenManagerUpgradeableV3.sol";
+import {MintAndBurnTokenManagerUpgradeableV3} from "contracts/periphery/TokenManagerV3/MintAndBurnTokenManagerUpgradeableV3.sol";
+import {BridgedToken} from "contracts/periphery/BridgedToken.sol";
+import {CallMetadata, IRelayerEvents} from "contracts/core/Relayer.sol";
+import {ValidatorManager} from "contracts/core/ValidatorManager.sol";
+import {ChainGateway} from "contracts/core/ChainGateway.sol";
+import {MessageHashUtils} from "@openzeppelin/contracts/utils/cryptography/MessageHashUtils.sol";
+import {TestToken} from "test/Helpers.sol";
+import {LockProxyTokenManagerUpgradeableV3} from "contracts/periphery/TokenManagerV3/LockProxyTokenManagerUpgradeableV3.sol";
+import {LockProxyTokenManagerDeployer} from "test/zilbridge/TokenManagerDeployers/LockProxyTokenManagerDeployer.sol";
+import {MintAndBurnTokenManagerDeployer} from "test/periphery/TokenManagerDeployers/MintAndBurnTokenManagerDeployer.sol";
+import {LockAndReleaseTokenManagerDeployer} from "test/periphery/TokenManagerDeployers/LockAndReleaseTokenManagerDeployer.sol";
+import { SwitcheoToken } from "test/zilbridge/tokens/switcheo/tokens/SwitcheoTokenETH.sol";
+import { ZilBridgeFixture } from "test/zilbridge/DeployZilBridge.t.sol";
+import { MockLockProxy } from "./MockLockProxy.sol";
+import { ZilBridgeTokenBridgeIntegrationFixture } from "./ZilBridgeTokenIntegrationFixture.t.sol";
+
+/// @title A general integration test for ZilBridge.
+/// @author rrw
+/*** @notice Tests some of the basic transfer routes: TestToken -> SwitcheoToken and back,
+ *  and native token -> SwitcheoToken and back. Testing SwitcheoToken -> nativetoken is
+ *  skipped, partly because it is symmetric and partly because it's not possible in zq1
+ *  anyway.
+ */
+contract ZilBridgeTokenBridgeIntegrationTest is ZilBridgeTokenBridgeIntegrationFixture {
+  using MessageHashUtils for bytes;
+
+
+  function setUp() external {
+    installContracts();
+  }
+
+  /// @notice test the happy path for a wrapped token to wrapped token exchange from TestToken to SwitcheoToken and back.
+  function test_happyPathWrappedToRemote() external {
+    startHoax(sourceUser);
+    uint amount = originalTokenSupply;
+    uint sourceChainId = block.chainid;
+    uint remoteChainId = block.chainid;
+    assertEq(nativelyOnSource.balanceOf(sourceUser), amount);
+
+    bytes memory data = abi.encodeWithSelector(
+        TokenManagerUpgradeable.accept.selector,
+        // From
+        CallMetadata(sourceChainId, address(sourceTokenManager)), 
+        // To
+        abi.encode(ITokenManagerStructs.AcceptArgs(address(remoteNativelyOnSource), remoteUser, amount)));
+
+    // approval goes to the token manager, which will transfer value to/from the lock proxy for you.
+    nativelyOnSource.approve(address(sourceTokenManager), amount);
+
+    // Ask the source token manager to take the source tokens and emit a relayed event
+    // (this should transfer the tokens to the lock proxy)
+    // TBD: Check this.
+    vm.expectEmit(address(sourceChainGateway));
+    emit IRelayerEvents.Relayed(remoteChainId,
+                                address(remoteTokenManager), data, 1_000_000, 0);
+    sourceTokenManager.transfer{value: fees}(
+        address(nativelyOnSource), remoteChainId, remoteUser, amount);
+
+    // Now bridge ..
+    vm.startPrank(validator);
+    bytes[] memory signatures = new bytes[](1);
+    signatures[0] = sign(validatorWallet, abi.encode(sourceChainId, remoteChainId,
+                                                     address(remoteTokenManager),
+                                                     data,
+                                                     1_000_000, 0)
+                         .toEthSignedMessageHash()
+                         );
+    remoteChainGateway.dispatch(sourceChainId,
+                                address(remoteTokenManager),
+                                data,
+                                1_000_000,
+                                0,
+                                signatures);
+
+    // OK. Now ..
+    assertEq(remoteNativelyOnSource.balanceOf(remoteUser), amount);
+    assertEq(remoteNativelyOnSource.totalSupply(), amount);
+    assertEq(nativelyOnSource.totalSupply(), amount);
+    assertEq(nativelyOnSource.balanceOf(sourceUser), 0);
+
+    // Send it back again.
+    startHoax(remoteUser);
+    remoteNativelyOnSource.approve(address(remoteTokenManager), amount);
+    remoteTokenManager.transfer{value: fees}(
+         address(remoteNativelyOnSource), sourceChainId, sourceUser, amount);
+
+    vm.startPrank(validator);
+    data = abi.encodeWithSelector(
+        TokenManagerUpgradeable.accept.selector,
+        // From
+        CallMetadata(remoteChainId, address(remoteTokenManager)),
+        // To
+        abi.encode(
+            ITokenManagerStructs.AcceptArgs(address(nativelyOnSource), sourceUser, amount)
+                   ));
+    signatures[0] = sign(
+        validatorWallet,
+        abi.encode(remoteChainId, sourceChainId,
+                   address(sourceTokenManager),
+                   data,
+                   1_000_000,
+                   0).toEthSignedMessageHash());
+    sourceChainGateway.dispatch(remoteChainId,
+                                address(sourceTokenManager),
+                                data,
+                                1_000_000,
+                                0,
+                                signatures);
+    // Check balances are back ..
+    assertEq(remoteNativelyOnSource.balanceOf(remoteUser), 0);
+    assertEq(nativelyOnSource.balanceOf(sourceUser), amount);
+  }
+
+
+  /// @notice Test native token to SwitcheoToken and back.
+  function test_happyPathNativeToken() external {
+    startHoax(sourceUser);
+    uint256 amount = originalTokenSupply;
+
+    // add some to account for gas.
+    uint accountForGas = 1 ether;
+    vm.deal(sourceUser, amount + accountForGas);
+    vm.deal(remoteUser, accountForGas);
+    uint256 initialSourceBalance = sourceUser.balance;
+    uint sourceChainId = block.chainid;
+    uint remoteChainId = block.chainid;
+    assertGt(sourceUser.balance, originalTokenSupply);
+
+    bytes memory data = abi.encodeWithSelector(
+        TokenManagerUpgradeable.accept.selector,
+        // From
+        CallMetadata(sourceChainId, address(sourceTokenManager)),
+        // To
+        abi.encode(ITokenManagerStructs.AcceptArgs(address(remoteBridgedGasToken), remoteUser, amount)));
+    vm.expectEmit(address(sourceChainGateway));
+    emit IRelayerEvents.Relayed(remoteChainId,
+                                address(remoteTokenManager), data, 1_000_000, 0);
+    sourceTokenManager.transfer{ value: fees + originalTokenSupply }(
+        address(0), remoteChainId, remoteUser, amount);
+
+    // Bridge!
+    vm.startPrank(validator);
+    bytes[] memory signatures = new bytes[](1);
+    signatures[0] = sign(validatorWallet, abi.encode(sourceChainId, remoteChainId,
+                                                     address(remoteTokenManager),
+                                                     data,
+                                                     1_000_000, 0)
+                         .toEthSignedMessageHash());
+
+    remoteChainGateway.dispatch(sourceChainId, address(remoteTokenManager), data, 1_000_000, 0, signatures);
+
+    // The source user should now have less balance then accountForGas
+    assertLe(sourceUser.balance, initialSourceBalance - amount);
+    uint256 sourceUserBalanceAfterTransfer = sourceUser.balance;
+    // The lock proxy should have the balance.
+    assertEq(address(lockProxy).balance, amount);
+    // The remote user should have the right number of wrapped tokens
+    assertEq(remoteBridgedGasToken.balanceOf(sourceUser), 0);
+    assertEq(remoteBridgedGasToken.balanceOf(remoteUser), amount);
+    assertEq(remoteBridgedGasToken.totalSupply(), amount);
+
+    // ..aaand send them all back again
+    vm.startPrank(remoteUser);
+    remoteBridgedGasToken.approve(address(remoteTokenManager), amount);
+    remoteTokenManager.transfer{value: fees}(
+        address(remoteBridgedGasToken), sourceChainId, sourceUser, amount);
+    vm.startPrank(validator);
+    data = abi.encodeWithSelector(
+        TokenManagerUpgradeable.accept.selector,
+        // From
+        CallMetadata(remoteChainId, address(remoteTokenManager)),
+        // To
+        abi.encode(
+            ITokenManagerStructs.AcceptArgs(address(0), sourceUser, amount)));
+    signatures[0] = sign(
+        validatorWallet,
+        abi.encode(remoteChainId, sourceChainId,
+                   address(sourceTokenManager),
+                   data,
+                   1_000_000, 0).toEthSignedMessageHash());
+    sourceChainGateway.dispatch(remoteChainId,
+                                address(sourceTokenManager),
+                                data,
+                                1_000_000,
+                                0,
+                                signatures);
+    // Balances should now be back
+    assertEq(sourceUser.balance, sourceUserBalanceAfterTransfer + amount);
+    assertEq(remoteBridgedGasToken.balanceOf(remoteUser), 0);
+    // Weirdly, the supply is nondecreasing - this seems to be intentional in SwitcheoToken...
+    assertEq(remoteBridgedGasToken.totalSupply(), amount);
+  }
+
+  /// @notice test the happy path for a remote wrapped token back to the source. 
+  function test_happyPathFromRemote() external {
+    startHoax(remoteUser);
+    uint amount = originalTokenSupply;
+    uint sourceChainId = block.chainid;
+    uint remoteChainId = block.chainid;
+    assertEq(nativelyOnRemote.balanceOf(remoteUser), amount);
+
+    bytes memory data = abi.encodeWithSelector(
+        TokenManagerUpgradeable.accept.selector,
+        // From
+        CallMetadata(remoteChainId, address(remoteTokenManager)),
+        // To
+        abi.encode(ITokenManagerStructs.AcceptArgs(address(sourceNativelyOnRemote), sourceUser, amount)));
+
+    nativelyOnRemote.approve(address(remoteTokenManager), amount);
+
+    vm.expectEmit(address(remoteChainGateway));
+    emit IRelayerEvents.Relayed(sourceChainId,
+                                address(sourceTokenManager), data, 1_000_000, 0);
+    remoteTokenManager.transfer{value: fees} (
+        address(nativelyOnRemote), sourceChainId, sourceUser, amount);
+
+    vm.startPrank(validator);
+    bytes[] memory signatures = new bytes[](1);
+    signatures[0] = sign(validatorWallet, abi.encode(remoteChainId, sourceChainId,
+                                                     address(sourceTokenManager),
+                                                     data,
+                                                     1_000_000, 0).toEthSignedMessageHash());
+    sourceChainGateway.dispatch(remoteChainId,
+                                address(sourceTokenManager),
+                                data,
+                                1_000_000, 0, signatures);
+    // OK. Now ...
+    assertEq(sourceNativelyOnRemote.balanceOf(sourceUser), amount);
+    assertEq(sourceNativelyOnRemote.totalSupply(), amount);
+    assertEq(nativelyOnRemote.totalSupply(), amount);
+    assertEq(nativelyOnRemote.balanceOf(remoteUser), 0);
+  }
+}
diff --git a/smart-contracts/test/zilbridge/ZilBridgeTokenIntegrationFixture.t.sol b/smart-contracts/test/zilbridge/ZilBridgeTokenIntegrationFixture.t.sol
new file mode 100644
index 0000000..4efb78c
--- /dev/null
+++ b/smart-contracts/test/zilbridge/ZilBridgeTokenIntegrationFixture.t.sol
@@ -0,0 +1,152 @@
+// SPDX-License-Identifier: MIT OR Apache-2.0
+pragma solidity 0.8.20;
+
+import "forge-std/console.sol";
+import {Tester, Vm} from "test/Tester.sol";
+import {ITokenManagerStructs, TokenManagerUpgradeable} from "contracts/periphery/TokenManagerUpgradeable.sol";
+import {LockAndReleaseTokenManagerUpgradeableV3} from "contracts/periphery/TokenManagerV3/LockAndReleaseTokenManagerUpgradeableV3.sol";
+import {MintAndBurnTokenManagerUpgradeableV3} from "contracts/periphery/TokenManagerV3/MintAndBurnTokenManagerUpgradeableV3.sol";
+import {BridgedToken} from "contracts/periphery/BridgedToken.sol";
+import {CallMetadata, IRelayerEvents} from "contracts/core/Relayer.sol";
+import {ValidatorManager} from "contracts/core/ValidatorManager.sol";
+import {ChainGateway} from "contracts/core/ChainGateway.sol";
+import {MessageHashUtils} from "@openzeppelin/contracts/utils/cryptography/MessageHashUtils.sol";
+import {TestToken} from "test/Helpers.sol";
+import {LockProxyTokenManagerUpgradeableV3} from "contracts/periphery/TokenManagerV3/LockProxyTokenManagerUpgradeableV3.sol";
+import {LockProxyTokenManagerDeployer} from "test/zilbridge/TokenManagerDeployers/LockProxyTokenManagerDeployer.sol";
+import {MintAndBurnTokenManagerDeployer} from "test/periphery/TokenManagerDeployers/MintAndBurnTokenManagerDeployer.sol";
+import {LockAndReleaseTokenManagerDeployer} from "test/periphery/TokenManagerDeployers/LockAndReleaseTokenManagerDeployer.sol";
+import { SwitcheoToken } from "test/zilbridge/tokens/switcheo/tokens/SwitcheoTokenETH.sol";
+import { ZilBridgeFixture } from "test/zilbridge/DeployZilBridge.t.sol";
+import { MockLockProxy } from "./MockLockProxy.sol";
+
+
+/*** @notice This deploys a bridge that is ZilBridge token manager on one side and lock-and-release on the other.
+ * We do this so we can test ZilBridge integration end to end, though in fact the "other side" of the bridge will be provided
+ * by the code in the Scilla half of this repo.
+ *
+ * Since the word "native" is quite heavily overloaded, we use "gas" to describe the gas token - ETH on ethereum, for example.
+ */
+contract ZilBridgeTokenBridgeIntegrationFixture is
+Tester, IRelayerEvents, LockAndReleaseTokenManagerDeployer, LockProxyTokenManagerDeployer, ZilBridgeFixture {
+  using MessageHashUtils for bytes;
+
+  // Gateway shared between the two chains
+  Vm.Wallet validatorWallet = vm.createWallet(1);
+  address validator = validatorWallet.addr;
+  address[] validators = [ validator ];
+  address sourceUser = vm.addr(2);
+  address remoteUser = vm.addr(3);
+  uint originalTokenSupply = 1000 ether;
+  uint fees = 0.1 ether;
+
+  LockProxyTokenManagerUpgradeableV3 sourceTokenManager;
+  // There are "actually" three of these - native (which is lock/release), a mint/burn token and a conventional token.
+  // This means we need a remote lock manager and a remote mint burn manager.
+  TestToken nativelyOnSource;
+  SwitcheoToken sourceNativelyOnRemote;
+  ChainGateway sourceChainGateway;
+  ValidatorManager sourceValidatorManager;
+
+  // see doc/zilbridge.md
+  MockLockProxy mockRemoteLockProxy;
+  LockProxyTokenManagerUpgradeableV3 remoteTokenManager;
+  SwitcheoToken remoteNativelyOnSource;
+  SwitcheoToken remoteBridgedGasToken;
+  TestToken nativelyOnRemote;
+
+  ChainGateway remoteChainGateway;
+  ValidatorManager remoteValidatorManager;
+
+  function installContracts() public {
+    setUpZilBridgeForTesting();
+
+    vm.startPrank(validator);
+    // Deploy source infra
+    sourceValidatorManager = new ValidatorManager(validator);
+    sourceValidatorManager.initialize(validators);
+    sourceChainGateway = new ChainGateway(address(sourceValidatorManager), validator);
+
+    // Deploy target infra
+    remoteValidatorManager = new ValidatorManager(validator);
+    remoteValidatorManager.initialize(validators);
+    remoteChainGateway = new ChainGateway(address(remoteValidatorManager), validator);
+
+    // Deploy the token managers
+    sourceTokenManager = deployLatestLockProxyTokenManager(address(sourceChainGateway), address(lockProxy), fees);
+    mockRemoteLockProxy = new MockLockProxy();
+    remoteTokenManager = deployLatestLockProxyTokenManager(address(remoteChainGateway), address(mockRemoteLockProxy), fees);
+
+    vm.stopPrank();
+    // Make the token manager an extension.
+    installTokenManager(address(sourceTokenManager));
+
+    // That involved a prank, so we need to reset our caller to the validator.
+    vm.startPrank(validator);
+
+    // Register contracts to chaingateway
+    sourceChainGateway.register(address(sourceTokenManager));
+    remoteChainGateway.register(address(remoteTokenManager));
+
+    // Deploy the test tokens.
+    nativelyOnSource = new TestToken(originalTokenSupply);
+    nativelyOnSource.transfer(sourceUser, originalTokenSupply);
+
+    remoteNativelyOnSource = new SwitcheoToken(address(mockRemoteLockProxy), "Bridged testToken", "eTST", 18);
+    // When coins arrive at the remote token manager for remoteNativelyOnSource, send them to nativelyOnSource's
+    // manager at sourceTokenManager.
+    ITokenManagerStructs.RemoteToken memory sourceNOSStruct = ITokenManagerStructs.RemoteToken({
+     token: address(nativelyOnSource),
+     tokenManager: address(sourceTokenManager),
+     chainId: block.chainid });
+    remoteTokenManager.registerToken(address(remoteNativelyOnSource), sourceNOSStruct);
+
+    // When coins arrive at nativelyOnSource, send them to remoteNativelyOnSource's manager at remoteTokenManager
+    ITokenManagerStructs.RemoteToken memory remoteNOSStruct = ITokenManagerStructs.RemoteToken({
+     token: address(remoteNativelyOnSource),
+     tokenManager: address(remoteTokenManager),
+     chainId: block.chainid });
+    sourceTokenManager.registerToken(address(nativelyOnSource), remoteNOSStruct);
+
+    // Now, we'll do the gas token. This has to be a switcheo token, because
+    // the other side can hardly be mint & burn.
+    remoteBridgedGasToken = new SwitcheoToken(address(mockRemoteLockProxy), "Bridged gas", "eGAS", 18);
+    console.log("remoteBridgedGasToken = %s", address(remoteBridgedGasToken));
+    console.log("mockLockProxy = %s", address(mockRemoteLockProxy));
+    // When coins arrive at the remote token manager, send them to 0 on the source token manager.
+    ITokenManagerStructs.RemoteToken memory sourceGasStruct = ITokenManagerStructs.RemoteToken({
+     token: address(0),
+     tokenManager: address(sourceTokenManager),
+     chainId: block.chainid });
+    remoteTokenManager.registerToken(address(remoteBridgedGasToken), sourceGasStruct);
+
+    // When coins arrive at 0 on the source token manager, send them to remoteridgedGasToken on the remote
+    ITokenManagerStructs.RemoteToken memory remoteGasStruct = ITokenManagerStructs.RemoteToken({
+     token: address(remoteBridgedGasToken),
+     tokenManager: address(remoteTokenManager),
+     chainId: block.chainid });
+    sourceTokenManager.registerToken(address(0), remoteGasStruct);
+
+    nativelyOnRemote = new TestToken(originalTokenSupply);
+    sourceNativelyOnRemote = new SwitcheoToken(address(lockProxy), "Back-ported test token", "bTST", 18);
+    nativelyOnRemote.transfer(remoteUser, originalTokenSupply);
+    
+    // When tokens arrive at the remote token manager, send them to the source
+    ITokenManagerStructs.RemoteToken memory sourceBackStruct = ITokenManagerStructs.RemoteToken({
+     token: address(sourceNativelyOnRemote),
+     tokenManager: address(sourceTokenManager),
+     chainId: block.chainid });
+    remoteTokenManager.registerToken(address(nativelyOnRemote), sourceBackStruct);
+
+    // When tokens arrive at the source token manager, send them to the remote
+    ITokenManagerStructs.RemoteToken memory remoteBackStruct = ITokenManagerStructs.RemoteToken({
+     token: address(nativelyOnRemote),
+     tokenManager: address(remoteTokenManager),
+     chainId: block.chainid });
+    sourceTokenManager.registerToken(address(sourceNativelyOnRemote), remoteBackStruct);
+
+    vm.stopPrank();
+  }
+
+}
+
diff --git a/smart-contracts/test/zilbridge/ZilBridgeTransfer.t.sol b/smart-contracts/test/zilbridge/ZilBridgeTransfer.t.sol
new file mode 100644
index 0000000..bcc99a3
--- /dev/null
+++ b/smart-contracts/test/zilbridge/ZilBridgeTransfer.t.sol
@@ -0,0 +1,19 @@
+// SPDX-License-Identifier: MIT OR Apache-2.0
+pragma solidity 0.8.20;
+
+import "forge-std/console.sol";
+import {Tester} from "test/Tester.sol";
+import {TestToken} from "test/Helpers.sol";
+import { LockProxy } from "test/zilbridge/infrastructure/lockProxy.sol";
+import { EthCrossChainManagerProxy } from "test/zilbridge/infrastructure/ccmProxy.sol";
+import { EthCrossChainManager } from "test/zilbridge/infrastructure//ccmCrossChainManager.sol";
+import { EthCrossChainData } from "test/zilbridge/infrastructure/ethCrossChainData.sol";
+import { EthExtendCrossChainManager } from "contracts/periphery/ZilBridge/ccmExtendCrossChainManager.sol";
+import { ZilBridgeFixture } from "./DeployZilBridge.t.sol";
+
+contract ZilBridgeTransferTest is ZilBridgeFixture {
+  function test_installNativeTokenBridge() external {
+    //setUpZilBridgeForTesting();
+    //installTokenManager();
+  }
+}
diff --git a/smart-contracts/test/zilbridge/ccmExtendCrossChainManager.t.sol b/smart-contracts/test/zilbridge/ccmExtendCrossChainManager.t.sol
new file mode 100644
index 0000000..14ac4b4
--- /dev/null
+++ b/smart-contracts/test/zilbridge/ccmExtendCrossChainManager.t.sol
@@ -0,0 +1,79 @@
+// SPDX-License-Identifier: MIT OR Apache-2.0
+pragma solidity 0.8.20;
+
+import "forge-std/console.sol";
+import {Tester} from "test/Tester.sol";
+import {TestToken} from "test/Helpers.sol";
+import { EthExtendCrossChainManager } from "contracts/periphery/ZilBridge/ccmExtendCrossChainManager.sol";
+import { Utils, ZeroCopySink, ZeroCopySource } from "test/zilbridge/infrastructure/ccmCrossChainManager.sol";
+import { EthCrossChainData } from "test/zilbridge/infrastructure/ethCrossChainData.sol";
+import { ZilBridgeFixture } from "./DeployZilBridge.t.sol";
+import { LockProxyTokenManagerUpgradeableV3 } from "contracts/periphery/TokenManagerV3/LockProxyTokenManagerUpgradeableV3.sol";
+
+contract ccmExtendCrossChainManager is ZilBridgeFixture {
+
+  function test_extensionManagerValue() external {
+    setUpZilBridgeForTesting();
+    require(extendCCM._extensionManager() == owner);
+    require(extendCCM.extensionManager() == owner);
+  }
+
+  function testFail_invalidRenounce() external {
+    setUpZilBridgeForTesting();
+    vm.startPrank(other);
+    extendCCM.renounceExtensionManagement();
+    vm.stopPrank();
+  }
+
+  function testFail_invalidTransfer() external {
+    setUpZilBridgeForTesting();
+    vm.startPrank(other);
+    extendCCM.transferExtensionManagement(third);
+    vm.stopPrank();
+  }
+
+  function test_transferExtensionManager() external {
+    setUpZilBridgeForTesting();
+    vm.startPrank(owner);
+    extendCCM.transferExtensionManagement(other);
+    vm.stopPrank();
+    vm.startPrank(other);
+    extendCCM.transferExtensionManagement(third);
+    vm.stopPrank();
+  }
+
+  // TODO: remainder of the authorisation tests for transferExtensionManager.
+
+  function test_addExtension() external {
+    setUpZilBridgeForTesting();
+    uint fees = 0.1 ether;
+    // Create a lock proxy token manager - fake out the source chain gateway
+    LockProxyTokenManagerUpgradeableV3 lpTokenManager = deployLatestLockProxyTokenManager(address(0), address(lockProxy), fees);
+    installTokenManager(address(lpTokenManager));
+    require(lockProxy.extensions(address(lpTokenManager))==true);
+  }
+
+  function test_Pickle() view external {
+    console.log("owner = %s", owner);
+    bytes memory payload = ZeroCopySink.WriteVarBytes(Utils.addressToBytes(owner));
+    console.logBytes(payload);
+    uint256 off = 0;
+    bytes memory result;
+    {
+      bytes1 v;
+      uint256 offset = 0;
+      (v,offset) = ZeroCopySource.NextByte(payload, offset);
+      console.log("F");
+      console.logBytes1(v);
+    }
+    {
+      uint len;
+      uint256 offset = 0;
+      (len,offset) = ZeroCopySource.NextVarUint(payload, offset);
+      console.log("len = %d offset = %d payload = %d", len, offset, payload.length);
+    }
+    (result, off) = ZeroCopySource.NextVarBytes(payload, off);
+    console.logBytes(result);
+  }
+}
+
diff --git a/smart-contracts/test/zilbridge/infrastructure/ccmCrossChainManager.sol b/smart-contracts/test/zilbridge/infrastructure/ccmCrossChainManager.sol
new file mode 100644
index 0000000..cbbffd1
--- /dev/null
+++ b/smart-contracts/test/zilbridge/infrastructure/ccmCrossChainManager.sol
@@ -0,0 +1,1618 @@
+/**
+ *Submitted for verification at Etherscan.io on 2021-10-19
+*/
+
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.2;
+
+abstract contract Context {
+    // Empty internal constructor, to prevent people from mistakenly deploying
+    // an instance of this contract, which should be used via inheritance.
+    constructor () { }
+    // solhint-disable-previous-line no-empty-blocks
+
+    function _msgSender() internal view returns (address payable) {
+      return payable(msg.sender);
+    }
+
+    function _msgData() internal view returns (bytes memory) {
+        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
+        return msg.data;
+    }
+}
+
+interface IOwnable {
+      function isOwner() external view returns (bool);
+}
+
+abstract contract Ownable is Context, IOwnable {
+    address private _owner;
+
+    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
+
+    /**
+     * @dev Initializes the contract setting the deployer as the initial owner.
+     */
+    constructor () {
+        address msgSender = _msgSender();
+        _owner = msgSender;
+        emit OwnershipTransferred(address(0), msgSender);
+    }
+
+    /**
+     * @dev Returns the address of the current owner.
+     */
+    function owner() public view returns (address) {
+        return _owner;
+    }
+
+    /**
+     * @dev Throws if called by any account other than the owner.
+     */
+    modifier onlyOwner() {
+        require(isOwner(), "Ownable: caller is not the owner");
+        _;
+    }
+
+    /**
+     * @dev Returns true if the caller is the current owner.
+     */
+    function isOwner() public view returns (bool) {
+        return _msgSender() == _owner;
+    }
+
+    /**
+     * @dev Leaves the contract without owner. It will not be possible to call
+     * `onlyOwner` functions anymore. Can only be called by the current owner.
+     *
+     * NOTE: Renouncing ownership will leave the contract without an owner,
+     * thereby removing any functionality that is only available to the owner.
+     */
+    function renounceOwnership() public onlyOwner {
+        emit OwnershipTransferred(_owner, address(0));
+        _owner = address(0);
+    }
+
+    /**
+     * @dev Transfers ownership of the contract to a new account (`newOwner`).
+     * Can only be called by the current owner.
+     */
+    function transferOwnership(address newOwner) public  onlyOwner {
+        _transferOwnership(newOwner);
+    }
+
+    /**
+     * @dev Transfers ownership of the contract to a new account (`newOwner`).
+     */
+    function _transferOwnership(address newOwner) internal {
+        require(newOwner != address(0), "Ownable: new owner is the zero address");
+        emit OwnershipTransferred(_owner, newOwner);
+        _owner = newOwner;
+    }
+}
+
+interface IPausable {
+    function paused() external view returns (bool);
+}
+
+abstract contract Pausable is Context, IPausable {
+    /**
+     * @dev Emitted when the pause is triggered by a pauser (`account`).
+     */
+    event Paused(address account);
+
+    /**
+     * @dev Emitted when the pause is lifted by a pauser (`account`).
+     */
+    event Unpaused(address account);
+
+    bool private _paused;
+
+    /**
+     * @dev Initializes the contract in unpaused state.
+     */
+    constructor () {
+        _paused = false;
+    }
+
+    /**
+     * @dev Returns true if the contract is paused, and false otherwise.
+     */
+    function paused() public view returns (bool) {
+        return _paused;
+    }
+
+    /**
+     * @dev Modifier to make a function callable only when the contract is not paused.
+     */
+    modifier whenNotPaused() {
+        require(!_paused, "Pausable: paused");
+        _;
+    }
+
+    /**
+     * @dev Modifier to make a function callable only when the contract is paused.
+     */
+    modifier whenPaused() {
+        require(_paused, "Pausable: not paused");
+        _;
+    }
+
+    /**
+     * @dev Called to pause, triggers stopped state.
+     */
+    function _pause() internal whenNotPaused {
+        _paused = true;
+        emit Paused(_msgSender());
+    }
+
+    /**
+     * @dev Called to unpause, returns to normal state.
+     */
+    function _unpause() internal whenPaused {
+        _paused = false;
+        emit Unpaused(_msgSender());
+    }
+}
+
+library ZeroCopySink {
+    /* @notice          Convert boolean value into bytes
+    *  @param b         The boolean value
+    *  @return          Converted bytes array
+    */
+    function WriteBool(bool b) internal pure returns (bytes memory) {
+        bytes memory buff;
+        assembly{
+            buff := mload(0x40)
+            mstore(buff, 1)
+            switch iszero(b)
+            case 1 {
+                mstore(add(buff, 0x20), shl(248, 0x00))
+                // mstore8(add(buff, 0x20), 0x00)
+            }
+            default {
+                mstore(add(buff, 0x20), shl(248, 0x01))
+                // mstore8(add(buff, 0x20), 0x01)
+            }
+            mstore(0x40, add(buff, 0x21))
+        }
+        return buff;
+    }
+
+    /* @notice          Convert byte value into bytes
+    *  @param b         The byte value
+    *  @return          Converted bytes array
+    */
+    function WriteByte(bytes1 b) internal pure returns (bytes memory) {
+        return WriteUint8(uint8(b));
+    }
+
+    /* @notice          Convert uint8 value into bytes
+    *  @param v         The uint8 value
+    *  @return          Converted bytes array
+    */
+    function WriteUint8(uint8 v) internal pure returns (bytes memory) {
+        bytes memory buff;
+        assembly{
+            buff := mload(0x40)
+            mstore(buff, 1)
+            mstore(add(buff, 0x20), shl(248, v))
+            // mstore(add(buff, 0x20), byte(0x1f, v))
+            mstore(0x40, add(buff, 0x21))
+        }
+        return buff;
+    }
+
+    /* @notice          Convert uint16 value into bytes
+    *  @param v         The uint16 value
+    *  @return          Converted bytes array
+    */
+    function WriteUint16(uint16 v) internal pure returns (bytes memory) {
+        bytes memory buff;
+
+        assembly{
+            buff := mload(0x40)
+            let byteLen := 0x02
+            mstore(buff, byteLen)
+            for {
+                let mindex := 0x00
+                let vindex := 0x1f
+            } lt(mindex, byteLen) {
+                mindex := add(mindex, 0x01)
+                vindex := sub(vindex, 0x01)
+            }{
+                mstore8(add(add(buff, 0x20), mindex), byte(vindex, v))
+            }
+            mstore(0x40, add(buff, 0x22))
+        }
+        return buff;
+    }
+    
+    /* @notice          Convert uint32 value into bytes
+    *  @param v         The uint32 value
+    *  @return          Converted bytes array
+    */
+    function WriteUint32(uint32 v) internal pure returns(bytes memory) {
+        bytes memory buff;
+        assembly{
+            buff := mload(0x40)
+            let byteLen := 0x04
+            mstore(buff, byteLen)
+            for {
+                let mindex := 0x00
+                let vindex := 0x1f
+            } lt(mindex, byteLen) {
+                mindex := add(mindex, 0x01)
+                vindex := sub(vindex, 0x01)
+            }{
+                mstore8(add(add(buff, 0x20), mindex), byte(vindex, v))
+            }
+            mstore(0x40, add(buff, 0x24))
+        }
+        return buff;
+    }
+
+    /* @notice          Convert uint64 value into bytes
+    *  @param v         The uint64 value
+    *  @return          Converted bytes array
+    */
+    function WriteUint64(uint64 v) internal pure returns(bytes memory) {
+        bytes memory buff;
+
+        assembly{
+            buff := mload(0x40)
+            let byteLen := 0x08
+            mstore(buff, byteLen)
+            for {
+                let mindex := 0x00
+                let vindex := 0x1f
+            } lt(mindex, byteLen) {
+                mindex := add(mindex, 0x01)
+                vindex := sub(vindex, 0x01)
+            }{
+                mstore8(add(add(buff, 0x20), mindex), byte(vindex, v))
+            }
+            mstore(0x40, add(buff, 0x28))
+        }
+        return buff;
+    }
+
+    /* @notice          Convert limited uint256 value into bytes
+    *  @param v         The uint256 value
+    *  @return          Converted bytes array
+    */
+    function WriteUint255(uint256 v) internal pure returns (bytes memory) {
+        require(v <= 0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff, "Value exceeds uint255 range");
+        bytes memory buff;
+
+        assembly{
+            buff := mload(0x40)
+            let byteLen := 0x20
+            mstore(buff, byteLen)
+            for {
+                let mindex := 0x00
+                let vindex := 0x1f
+            } lt(mindex, byteLen) {
+                mindex := add(mindex, 0x01)
+                vindex := sub(vindex, 0x01)
+            }{
+                mstore8(add(add(buff, 0x20), mindex), byte(vindex, v))
+            }
+            mstore(0x40, add(buff, 0x40))
+        }
+        return buff;
+    }
+
+    /* @notice          Encode bytes format data into bytes
+    *  @param data      The bytes array data
+    *  @return          Encoded bytes array
+    */
+    function WriteVarBytes(bytes memory data) internal pure returns (bytes memory) {
+        uint64 l = uint64(data.length);
+        return abi.encodePacked(WriteVarUint(l), data);
+    }
+
+    function WriteVarUint(uint64 v) internal pure returns (bytes memory) {
+        if (v < 0xFD){
+    		return WriteUint8(uint8(v));
+    	} else if (v <= 0xFFFF) {
+    		return abi.encodePacked(WriteByte(0xFD), WriteUint16(uint16(v)));
+    	} else if (v <= 0xFFFFFFFF) {
+            return abi.encodePacked(WriteByte(0xFE), WriteUint32(uint32(v)));
+    	} else {
+    		return abi.encodePacked(WriteByte(0xFF), WriteUint64(uint64(v)));
+    	}
+    }
+}
+
+library ZeroCopySource {
+    /* @notice              Read next byte as boolean type starting at offset from buff
+    *  @param buff          Source bytes array
+    *  @param offset        The position from where we read the boolean value
+    *  @return              The the read boolean value and new offset
+    */
+    function NextBool(bytes memory buff, uint256 offset) internal pure returns(bool, uint256) {
+        require(offset + 1 <= buff.length && offset < offset + 1, "Offset exceeds limit");
+        // byte === bytes1
+        bytes1 v;
+        assembly{
+            v := mload(add(add(buff, 0x20), offset))
+        }
+        bool value;
+        if (v == 0x01) {
+		    value = true;
+    	} else if (v == 0x00) {
+            value = false;
+        } else {
+            revert("NextBool value error");
+        }
+        return (value, offset + 1);
+    }
+
+    /* @notice              Read next byte starting at offset from buff
+    *  @param buff          Source bytes array
+    *  @param offset        The position from where we read the byte value
+    *  @return              The read byte value and new offset
+    */
+    function NextByte(bytes memory buff, uint256 offset) internal pure returns (bytes1, uint256) {
+        require(offset + 1 <= buff.length && offset < offset + 1, "NextByte, Offset exceeds maximum");
+        bytes1 v;
+        assembly{
+            v := mload(add(add(buff, 0x20), offset))
+        }
+        return (v, offset + 1);
+    }
+
+    /* @notice              Read next byte as uint8 starting at offset from buff
+    *  @param buff          Source bytes array
+    *  @param offset        The position from where we read the byte value
+    *  @return              The read uint8 value and new offset
+    */
+    function NextUint8(bytes memory buff, uint256 offset) internal pure returns (uint8, uint256) {
+        require(offset + 1 <= buff.length && offset < offset + 1, "NextUint8, Offset exceeds maximum");
+        uint8 v;
+        assembly{
+            let tmpbytes := mload(0x40)
+            let bvalue := mload(add(add(buff, 0x20), offset))
+            mstore8(tmpbytes, byte(0, bvalue))
+            mstore(0x40, add(tmpbytes, 0x01))
+            v := mload(sub(tmpbytes, 0x1f))
+        }
+        return (v, offset + 1);
+    }
+
+    /* @notice              Read next two bytes as uint16 type starting from offset
+    *  @param buff          Source bytes array
+    *  @param offset        The position from where we read the uint16 value
+    *  @return              The read uint16 value and updated offset
+    */
+    function NextUint16(bytes memory buff, uint256 offset) internal pure returns (uint16, uint256) {
+        require(offset + 2 <= buff.length && offset < offset + 2, "NextUint16, offset exceeds maximum");
+        
+        uint16 v;
+        assembly {
+            let tmpbytes := mload(0x40)
+            let bvalue := mload(add(add(buff, 0x20), offset))
+            mstore8(tmpbytes, byte(0x01, bvalue))
+            mstore8(add(tmpbytes, 0x01), byte(0, bvalue))
+            mstore(0x40, add(tmpbytes, 0x02))
+            v := mload(sub(tmpbytes, 0x1e))
+        }
+        return (v, offset + 2);
+    }
+
+
+    /* @notice              Read next four bytes as uint32 type starting from offset
+    *  @param buff          Source bytes array
+    *  @param offset        The position from where we read the uint32 value
+    *  @return              The read uint32 value and updated offset
+    */
+    function NextUint32(bytes memory buff, uint256 offset) internal pure returns (uint32, uint256) {
+        require(offset + 4 <= buff.length && offset < offset + 4, "NextUint32, offset exceeds maximum");
+        uint32 v;
+        assembly {
+            let tmpbytes := mload(0x40)
+            let byteLen := 0x04
+            for {
+                let tindex := 0x00
+                let bindex := sub(byteLen, 0x01)
+                let bvalue := mload(add(add(buff, 0x20), offset))
+            } lt(tindex, byteLen) {
+                tindex := add(tindex, 0x01)
+                bindex := sub(bindex, 0x01)
+            }{
+                mstore8(add(tmpbytes, tindex), byte(bindex, bvalue))
+            }
+            mstore(0x40, add(tmpbytes, byteLen))
+            v := mload(sub(tmpbytes, sub(0x20, byteLen)))
+        }
+        return (v, offset + 4);
+    }
+
+    /* @notice              Read next eight bytes as uint64 type starting from offset
+    *  @param buff          Source bytes array
+    *  @param offset        The position from where we read the uint64 value
+    *  @return              The read uint64 value and updated offset
+    */
+    function NextUint64(bytes memory buff, uint256 offset) internal pure returns (uint64, uint256) {
+        require(offset + 8 <= buff.length && offset < offset + 8, "NextUint64, offset exceeds maximum");
+        uint64 v;
+        assembly {
+            let tmpbytes := mload(0x40)
+            let byteLen := 0x08
+            for {
+                let tindex := 0x00
+                let bindex := sub(byteLen, 0x01)
+                let bvalue := mload(add(add(buff, 0x20), offset))
+            } lt(tindex, byteLen) {
+                tindex := add(tindex, 0x01)
+                bindex := sub(bindex, 0x01)
+            }{
+                mstore8(add(tmpbytes, tindex), byte(bindex, bvalue))
+            }
+            mstore(0x40, add(tmpbytes, byteLen))
+            v := mload(sub(tmpbytes, sub(0x20, byteLen)))
+        }
+        return (v, offset + 8);
+    }
+
+    /* @notice              Read next 32 bytes as uint256 type starting from offset,
+                            there are limits considering the numerical limits in multi-chain
+    *  @param buff          Source bytes array
+    *  @param offset        The position from where we read the uint256 value
+    *  @return              The read uint256 value and updated offset
+    */
+    function NextUint255(bytes memory buff, uint256 offset) internal pure returns (uint256, uint256) {
+        require(offset + 32 <= buff.length && offset < offset + 32, "NextUint255, offset exceeds maximum");
+        uint256 v;
+        assembly {
+            let tmpbytes := mload(0x40)
+            let byteLen := 0x20
+            for {
+                let tindex := 0x00
+                let bindex := sub(byteLen, 0x01)
+                let bvalue := mload(add(add(buff, 0x20), offset))
+            } lt(tindex, byteLen) {
+                tindex := add(tindex, 0x01)
+                bindex := sub(bindex, 0x01)
+            }{
+                mstore8(add(tmpbytes, tindex), byte(bindex, bvalue))
+            }
+            mstore(0x40, add(tmpbytes, byteLen))
+            v := mload(tmpbytes)
+        }
+        require(v <= 0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff, "Value exceeds the range");
+        return (v, offset + 32);
+    }
+    /* @notice              Read next variable bytes starting from offset,
+                            the decoding rule coming from multi-chain
+    *  @param buff          Source bytes array
+    *  @param offset        The position from where we read the bytes value
+    *  @return              The read variable bytes array value and updated offset
+    */
+    function NextVarBytes(bytes memory buff, uint256 offset) internal pure returns(bytes memory, uint256) {
+        uint len;
+        (len, offset) = NextVarUint(buff, offset);
+        require(offset + len <= buff.length && offset < offset + len, "NextVarBytes, offset exceeds maximum");
+        bytes memory tempBytes;
+        assembly{
+            switch iszero(len)
+            case 0 {
+                // Get a location of some free memory and store it in tempBytes as
+                // Solidity does for memory variables.
+                tempBytes := mload(0x40)
+
+                // The first word of the slice result is potentially a partial
+                // word read from the original array. To read it, we calculate
+                // the length of that partial word and start copying that many
+                // bytes into the array. The first word we copy will start with
+                // data we don't care about, but the last `lengthmod` bytes will
+                // land at the beginning of the contents of the new array. When
+                // we're done copying, we overwrite the full first word with
+                // the actual length of the slice.
+                let lengthmod := and(len, 31)
+
+                // The multiplication in the next line is necessary
+                // because when slicing multiples of 32 bytes (lengthmod == 0)
+                // the following copy loop was copying the origin's length
+                // and then ending prematurely not copying everything it should.
+                let mc := add(add(tempBytes, lengthmod), mul(0x20, iszero(lengthmod)))
+                let end := add(mc, len)
+
+                for {
+                    // The multiplication in the next line has the same exact purpose
+                    // as the one above.
+                    let cc := add(add(add(buff, lengthmod), mul(0x20, iszero(lengthmod))), offset)
+                } lt(mc, end) {
+                    mc := add(mc, 0x20)
+                    cc := add(cc, 0x20)
+                } {
+                    mstore(mc, mload(cc))
+                }
+
+                mstore(tempBytes, len)
+
+                //update free-memory pointer
+                //allocating the array padded to 32 bytes like the compiler does now
+                mstore(0x40, and(add(mc, 31), not(31)))
+            }
+            //if we want a zero-length slice let's just return a zero-length array
+            default {
+                tempBytes := mload(0x40)
+
+                mstore(0x40, add(tempBytes, 0x20))
+            }
+        }
+
+        return (tempBytes, offset + len);
+    }
+    /* @notice              Read next 32 bytes starting from offset,
+    *  @param buff          Source bytes array
+    *  @param offset        The position from where we read the bytes value
+    *  @return              The read bytes32 value and updated offset
+    */
+    function NextHash(bytes memory buff, uint256 offset) internal pure returns (bytes32 , uint256) {
+        require(offset + 32 <= buff.length && offset < offset + 32, "NextHash, offset exceeds maximum");
+        bytes32 v;
+        assembly {
+            v := mload(add(buff, add(offset, 0x20)))
+        }
+        return (v, offset + 32);
+    }
+
+    /* @notice              Read next 20 bytes starting from offset,
+    *  @param buff          Source bytes array
+    *  @param offset        The position from where we read the bytes value
+    *  @return              The read bytes20 value and updated offset
+    */
+    function NextBytes20(bytes memory buff, uint256 offset) internal pure returns (bytes20 , uint256) {
+        require(offset + 20 <= buff.length && offset < offset + 20, "NextBytes20, offset exceeds maximum");
+        bytes20 v;
+        assembly {
+            v := mload(add(buff, add(offset, 0x20)))
+        }
+        return (v, offset + 20);
+    }
+    
+    function NextVarUint(bytes memory buff, uint256 offset) internal pure returns(uint, uint256) {
+        bytes1 v;
+        (v, offset) = NextByte(buff, offset);
+
+        uint value;
+        if (v == 0xFD) {
+            // return NextUint16(buff, offset);
+            (value, offset) = NextUint16(buff, offset);
+            require(value >= 0xFD && value <= 0xFFFF, "NextUint16, value outside range");
+            return (value, offset);
+        } else if (v == 0xFE) {
+            // return NextUint32(buff, offset);
+            (value, offset) = NextUint32(buff, offset);
+            require(value > 0xFFFF && value <= 0xFFFFFFFF, "NextVarUint, value outside range");
+            return (value, offset);
+        } else if (v == 0xFF) {
+            // return NextUint64(buff, offset);
+            (value, offset) = NextUint64(buff, offset);
+            require(value > 0xFFFFFFFF, "NextVarUint, value outside range");
+            return (value, offset);
+        } else{
+            // return (uint8(v), offset);
+            value = uint8(v);
+            require(value < 0xFD, "NextVarUint, value outside range");
+            return (value, offset);
+        }
+    }
+}
+
+library SafeMath {
+    /**
+     * @dev Returns the addition of two unsigned integers, reverting on
+     * overflow.
+     *
+     * Counterpart to Solidity's `+` operator.
+     *
+     * Requirements:
+     * - Addition cannot overflow.
+     */
+    function add(uint256 a, uint256 b) internal pure returns (uint256) {
+        uint256 c = a + b;
+        require(c >= a, "SafeMath: addition overflow");
+
+        return c;
+    }
+
+    /**
+     * @dev Returns the subtraction of two unsigned integers, reverting on
+     * overflow (when the result is negative).
+     *
+     * Counterpart to Solidity's `-` operator.
+     *
+     * Requirements:
+     * - Subtraction cannot overflow.
+     */
+    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
+        return sub(a, b, "SafeMath: subtraction overflow");
+    }
+
+    /**
+     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
+     * overflow (when the result is negative).
+     *
+     * Counterpart to Solidity's `-` operator.
+     *
+     * Requirements:
+     * - Subtraction cannot overflow.
+     *
+     * _Available since v2.4.0._
+     */
+    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
+        require(b <= a, errorMessage);
+        uint256 c = a - b;
+
+        return c;
+    }
+
+    /**
+     * @dev Returns the multiplication of two unsigned integers, reverting on
+     * overflow.
+     *
+     * Counterpart to Solidity's `*` operator.
+     *
+     * Requirements:
+     * - Multiplication cannot overflow.
+     */
+    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
+        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
+        // benefit is lost if 'b' is also tested.
+        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
+        if (a == 0) {
+            return 0;
+        }
+
+        uint256 c = a * b;
+        require(c / a == b, "SafeMath: multiplication overflow");
+
+        return c;
+    }
+
+    /**
+     * @dev Returns the integer division of two unsigned integers. Reverts on
+     * division by zero. The result is rounded towards zero.
+     *
+     * Counterpart to Solidity's `/` operator. Note: this function uses a
+     * `revert` opcode (which leaves remaining gas untouched) while Solidity
+     * uses an invalid opcode to revert (consuming all remaining gas).
+     *
+     * Requirements:
+     * - The divisor cannot be zero.
+     */
+    function div(uint256 a, uint256 b) internal pure returns (uint256) {
+        return div(a, b, "SafeMath: division by zero");
+    }
+
+    /**
+     * @dev Returns the integer division of two unsigned integers. Reverts with custom message on
+     * division by zero. The result is rounded towards zero.
+     *
+     * Counterpart to Solidity's `/` operator. Note: this function uses a
+     * `revert` opcode (which leaves remaining gas untouched) while Solidity
+     * uses an invalid opcode to revert (consuming all remaining gas).
+     *
+     * Requirements:
+     * - The divisor cannot be zero.
+     *
+     * _Available since v2.4.0._
+     */
+    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
+        // Solidity only automatically asserts when dividing by 0
+        require(b != 0, errorMessage);
+        uint256 c = a / b;
+        // assert(a == b * c + a % b); // There is no case in which this doesn't hold
+
+        return c;
+    }
+
+    /**
+     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
+     * Reverts when dividing by zero.
+     *
+     * Counterpart to Solidity's `%` operator. This function uses a `revert`
+     * opcode (which leaves remaining gas untouched) while Solidity uses an
+     * invalid opcode to revert (consuming all remaining gas).
+     *
+     * Requirements:
+     * - The divisor cannot be zero.
+     */
+    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
+        return mod(a, b, "SafeMath: modulo by zero");
+    }
+
+    /**
+     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
+     * Reverts with custom message when dividing by zero.
+     *
+     * Counterpart to Solidity's `%` operator. This function uses a `revert`
+     * opcode (which leaves remaining gas untouched) while Solidity uses an
+     * invalid opcode to revert (consuming all remaining gas).
+     *
+     * Requirements:
+     * - The divisor cannot be zero.
+     *
+     * _Available since v2.4.0._
+     */
+    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
+        require(b != 0, errorMessage);
+        return a % b;
+    }
+}
+
+
+library Utils {
+
+    /* @notice      Convert the bytes array to bytes32 type, the bytes array length must be 32
+    *  @param _bs   Source bytes array
+    *  @return      bytes32
+    */
+    function bytesToBytes32(bytes memory _bs) internal pure returns (bytes32 value) {
+        require(_bs.length == 32, "bytes length is not 32.");
+        assembly {
+            // load 32 bytes from memory starting from position _bs + 0x20 since the first 0x20 bytes stores _bs length
+            value := mload(add(_bs, 0x20))
+        }
+    }
+
+    /* @notice      Convert bytes to uint256
+    *  @param _b    Source bytes should have length of 32
+    *  @return      uint256
+    */
+    function bytesToUint256(bytes memory _bs) internal pure returns (uint256 value) {
+        require(_bs.length == 32, "bytes length is not 32.");
+        assembly {
+            // load 32 bytes from memory starting from position _bs + 32
+            value := mload(add(_bs, 0x20))
+        }
+        require(value <= 0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff, "Value exceeds the range");
+    }
+
+    /* @notice      Convert uint256 to bytes
+    *  @param _b    uint256 that needs to be converted
+    *  @return      bytes
+    */
+    function uint256ToBytes(uint256 _value) internal pure returns (bytes memory bs) {
+        require(_value <= 0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff, "Value exceeds the range");
+        assembly {
+            // Get a location of some free memory and store it in result as
+            // Solidity does for memory variables.
+            bs := mload(0x40)
+            // Put 0x20 at the first word, the length of bytes for uint256 value
+            mstore(bs, 0x20)
+            //In the next word, put value in bytes format to the next 32 bytes
+            mstore(add(bs, 0x20), _value)
+            // Update the free-memory pointer by padding our last write location to 32 bytes
+            mstore(0x40, add(bs, 0x40))
+        }
+    }
+
+    /* @notice      Convert bytes to address
+    *  @param _bs   Source bytes: bytes length must be 20
+    *  @return      Converted address from source bytes
+    */
+    function bytesToAddress(bytes memory _bs) internal pure returns (address addr)
+    {
+        require(_bs.length == 20, "bytes length does not match address");
+        assembly {
+            // for _bs, first word store _bs.length, second word store _bs.value
+            // load 32 bytes from mem[_bs+20], convert it into Uint160, meaning we take last 20 bytes as addr (address).
+            addr := mload(add(_bs, 0x14))
+        }
+
+    }
+    
+    /* @notice      Convert address to bytes
+    *  @param _addr Address need to be converted
+    *  @return      Converted bytes from address
+    */
+    function addressToBytes(address _addr) internal pure returns (bytes memory bs){
+        assembly {
+            // Get a location of some free memory and store it in result as
+            // Solidity does for memory variables.
+            bs := mload(0x40)
+            // Put 20 (address byte length) at the first word, the length of bytes for uint256 value
+            mstore(bs, 0x14)
+            // logical shift left _a by 12 bytes, change _a from right-aligned to left-aligned
+            mstore(add(bs, 0x20), shl(96, _addr))
+            // Update the free-memory pointer by padding our last write location to 32 bytes
+            mstore(0x40, add(bs, 0x40))
+       }
+    }
+
+    /* @notice          Do hash leaf as the multi-chain does
+    *  @param _data     Data in bytes format
+    *  @return          Hashed value in bytes32 format
+    */
+    function hashLeaf(bytes memory _data) internal pure returns (bytes32 result)  {
+        result = sha256(abi.encodePacked(bytes1(0x0), _data));
+    }
+
+    /* @notice          Do hash children as the multi-chain does
+    *  @param _l        Left node
+    *  @param _r        Right node
+    *  @return          Hashed value in bytes32 format
+    */
+    function hashChildren(bytes32 _l, bytes32  _r) internal pure returns (bytes32 result)  {
+        result = sha256(abi.encodePacked(bytes1(0x01), _l, _r));
+    }
+
+    /* @notice              Compare if two bytes are equal, which are in storage and memory, seperately
+                            Refer from https://github.com/summa-tx/bitcoin-spv/blob/master/solidity/contracts/BytesLib.sol#L368
+    *  @param _preBytes     The bytes stored in storage
+    *  @param _postBytes    The bytes stored in memory
+    *  @return              Bool type indicating if they are equal
+    */
+    function equalStorage(bytes storage _preBytes, bytes memory _postBytes) internal view returns (bool) {
+        bool success = true;
+
+        assembly {
+            // we know _preBytes_offset is 0
+            let fslot := sload(_preBytes.slot)
+            // Arrays of 31 bytes or less have an even value in their slot,
+            // while longer arrays have an odd value. The actual length is
+            // the slot divided by two for odd values, and the lowest order
+            // byte divided by two for even values.
+            // If the slot is even, bitwise and the slot with 255 and divide by
+            // two to get the length. If the slot is odd, bitwise and the slot
+            // with -1 and divide by two.
+            let slength := div(and(fslot, sub(mul(0x100, iszero(and(fslot, 1))), 1)), 2)
+            let mlength := mload(_postBytes)
+
+            // if lengths don't match the arrays are not equal
+            switch eq(slength, mlength)
+            case 1 {
+                // fslot can contain both the length and contents of the array
+                // if slength < 32 bytes so let's prepare for that
+                // v. http://solidity.readthedocs.io/en/latest/miscellaneous.html#layout-of-state-variables-in-storage
+                // slength != 0
+                if iszero(iszero(slength)) {
+                    switch lt(slength, 32)
+                    case 1 {
+                        // blank the last byte which is the length
+                        fslot := mul(div(fslot, 0x100), 0x100)
+
+                        if iszero(eq(fslot, mload(add(_postBytes, 0x20)))) {
+                            // unsuccess:
+                            success := 0
+                        }
+                    }
+                    default {
+                        // cb is a circuit breaker in the for loop since there's
+                        //  no said feature for inline assembly loops
+                        // cb = 1 - don't breaker
+                        // cb = 0 - break
+                        let cb := 1
+
+                        // get the keccak hash to get the contents of the array
+                        mstore(0x0, _preBytes.slot)
+                        let sc := keccak256(0x0, 0x20)
+
+                        let mc := add(_postBytes, 0x20)
+                        let end := add(mc, mlength)
+
+                        // the next line is the loop condition:
+                        // while(uint(mc < end) + cb == 2)
+                        for {} eq(add(lt(mc, end), cb), 2) {
+                            sc := add(sc, 1)
+                            mc := add(mc, 0x20)
+                        } {
+                            if iszero(eq(sload(sc), mload(mc))) {
+                                // unsuccess:
+                                success := 0
+                                cb := 0
+                            }
+                        }
+                    }
+                }
+            }
+            default {
+                // unsuccess:
+                success := 0
+            }
+        }
+
+        return success;
+    }
+
+    /* @notice              Slice the _bytes from _start index till the result has length of _length
+                            Refer from https://github.com/summa-tx/bitcoin-spv/blob/master/solidity/contracts/BytesLib.sol#L246
+    *  @param _bytes        The original bytes needs to be sliced
+    *  @param _start        The index of _bytes for the start of sliced bytes
+    *  @param _length       The index of _bytes for the end of sliced bytes
+    *  @return              The sliced bytes
+    */
+    function slice(
+        bytes memory _bytes,
+        uint _start,
+        uint _length
+    )
+        internal
+        pure
+        returns (bytes memory)
+    {
+        require(_bytes.length >= (_start + _length));
+
+        bytes memory tempBytes;
+
+        assembly {
+            switch iszero(_length)
+            case 0 {
+                // Get a location of some free memory and store it in tempBytes as
+                // Solidity does for memory variables.
+                tempBytes := mload(0x40)
+
+                // The first word of the slice result is potentially a partial
+                // word read from the original array. To read it, we calculate
+                // the length of that partial word and start copying that many
+                // bytes into the array. The first word we copy will start with
+                // data we don't care about, but the last `lengthmod` bytes will
+                // land at the beginning of the contents of the new array. When
+                // we're done copying, we overwrite the full first word with
+                // the actual length of the slice.
+                // lengthmod <= _length % 32
+                let lengthmod := and(_length, 31)
+
+                // The multiplication in the next line is necessary
+                // because when slicing multiples of 32 bytes (lengthmod == 0)
+                // the following copy loop was copying the origin's length
+                // and then ending prematurely not copying everything it should.
+                let mc := add(add(tempBytes, lengthmod), mul(0x20, iszero(lengthmod)))
+                let end := add(mc, _length)
+
+                for {
+                    // The multiplication in the next line has the same exact purpose
+                    // as the one above.
+                    let cc := add(add(add(_bytes, lengthmod), mul(0x20, iszero(lengthmod))), _start)
+                } lt(mc, end) {
+                    mc := add(mc, 0x20)
+                    cc := add(cc, 0x20)
+                } {
+                    mstore(mc, mload(cc))
+                }
+
+                mstore(tempBytes, _length)
+
+                //update free-memory pointer
+                //allocating the array padded to 32 bytes like the compiler does now
+                mstore(0x40, and(add(mc, 31), not(31)))
+            }
+            //if we want a zero-length slice let's just return a zero-length array
+            default {
+                tempBytes := mload(0x40)
+
+                mstore(0x40, add(tempBytes, 0x20))
+            }
+        }
+
+        return tempBytes;
+    }
+    /* @notice              Check if the elements number of _signers within _keepers array is no less than _m
+    *  @param _keepers      The array consists of serveral address
+    *  @param _signers      Some specific addresses to be looked into
+    *  @param _m            The number requirement paramter
+    *  @return              True means containment, false meansdo do not contain.
+    */
+    function containMAddresses(address[] memory _keepers, address[] memory _signers, uint _m) internal pure returns (bool){
+        uint m = 0;
+        for(uint i = 0; i < _signers.length; i++){
+            for (uint j = 0; j < _keepers.length; j++) {
+                if (_signers[i] == _keepers[j]) {
+                    m++;
+                    delete _keepers[j];
+                }
+            }
+        }
+        return m >= _m;
+    }
+
+    /* @notice              TODO
+    *  @param key
+    *  @return
+    */
+    function compressMCPubKey(bytes memory key) internal pure returns (bytes memory newkey) {
+         require(key.length >= 67, "key lenggh is too short");
+         newkey = slice(key, 0, 35);
+         if (uint8(key[66]) % 2 == 0){
+             newkey[2] = bytes1(0x02);
+         } else {
+             newkey[2] = bytes1(0x03);
+         }
+         return newkey;
+    }
+    
+    /**
+     * @dev Returns true if `account` is a contract.
+     *      Refer from https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/Address.sol#L18
+     *
+     * This test is non-exhaustive, and there may be false-negatives: during the
+     * execution of a contract's constructor, its address will be reported as
+     * not containing a contract.
+     *
+     * IMPORTANT: It is unsafe to assume that an address for which this
+     * function returns false is an externally-owned account (EOA) and not a
+     * contract.
+     */
+    function isContract(address account) internal view returns (bool) {
+        // This method relies in extcodesize, which returns 0 for contracts in
+        // construction, since the code is only stored at the end of the
+        // constructor execution.
+
+        // According to EIP-1052, 0x0 is the value returned for not-yet created accounts
+        // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
+        // for accounts without code, i.e. `keccak256('')`
+        bytes32 codehash;
+        bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
+        // solhint-disable-next-line no-inline-assembly
+        assembly { codehash := extcodehash(account) }
+        return (codehash != 0x0 && codehash != accountHash);
+    }
+}
+
+library ECCUtils {
+    using SafeMath for uint256;
+    
+    struct Header {
+        uint32 version;
+        uint64 chainId;
+        uint32 timestamp;
+        uint32 height;
+        uint64 consensusData;
+        bytes32 prevBlockHash;
+        bytes32 transactionsRoot;
+        bytes32 crossStatesRoot;
+        bytes32 blockRoot;
+        bytes consensusPayload;
+        bytes20 nextBookkeeper;
+    }
+
+    struct ToMerkleValue {
+        bytes  txHash;  // cross chain txhash
+        uint64 fromChainID;
+        TxParam makeTxParam;
+    }
+
+    struct TxParam {
+        bytes txHash; //  source chain txhash
+        bytes crossChainId;
+        bytes fromContract;
+        uint64 toChainId;
+        bytes toContract;
+        bytes method;
+        bytes args;
+    }
+
+    uint constant POLYCHAIN_PUBKEY_LEN = 67;
+    uint constant POLYCHAIN_SIGNATURE_LEN = 65;
+
+    /* @notice                  Verify Poly chain transaction whether exist or not
+    *  @param _auditPath        Poly chain merkle proof
+    *  @param _root             Poly chain root
+    *  @return                  The verified value included in _auditPath
+    */
+    function merkleProve(bytes memory _auditPath, bytes32 _root) internal pure returns (bytes memory) {
+        uint256 off = 0;
+        bytes memory value;
+        (value, off)  = ZeroCopySource.NextVarBytes(_auditPath, off);
+
+        bytes32 hash = Utils.hashLeaf(value);
+        uint size = _auditPath.length.sub(off).div(33);
+        bytes32 nodeHash;
+        bytes1 pos;
+        for (uint i = 0; i < size; i++) {
+            (pos, off) = ZeroCopySource.NextByte(_auditPath, off);
+            (nodeHash, off) = ZeroCopySource.NextHash(_auditPath, off);
+            if (pos == 0x00) {
+                hash = Utils.hashChildren(nodeHash, hash);
+            } else if (pos == 0x01) {
+                hash = Utils.hashChildren(hash, nodeHash);
+            } else {
+                revert("merkleProve, NextByte for position info failed");
+            }
+        }
+        require(hash == _root, "merkleProve, expect root is not equal actual root");
+        return value;
+    }
+
+    /* @notice              calculate next book keeper according to public key list
+    *  @param _keyLen       consensus node number
+    *  @param _m            minimum signature number
+    *  @param _pubKeyList   consensus node public key list
+    *  @return              two element: next book keeper, consensus node signer addresses
+    */
+    function _getBookKeeper(uint _keyLen, uint _m, bytes memory _pubKeyList) internal pure returns (bytes20, address[] memory){
+         bytes memory buff;
+         buff = ZeroCopySink.WriteUint16(uint16(_keyLen));
+         address[] memory keepers = new address[](_keyLen);
+         bytes32 hash;
+         bytes memory publicKey;
+         for(uint i = 0; i < _keyLen; i++){
+             publicKey = Utils.slice(_pubKeyList, i*POLYCHAIN_PUBKEY_LEN, POLYCHAIN_PUBKEY_LEN);
+             buff =  abi.encodePacked(buff, ZeroCopySink.WriteVarBytes(Utils.compressMCPubKey(publicKey)));
+             hash = keccak256(Utils.slice(publicKey, 3, 64));
+             keepers[i] = address(uint160(uint256(hash)));
+         }
+
+         buff = abi.encodePacked(buff, ZeroCopySink.WriteUint16(uint16(_m)));
+         bytes20  nextBookKeeper = ripemd160(abi.encodePacked(sha256(buff)));
+         return (nextBookKeeper, keepers);
+    }
+
+    /* @notice              Verify public key derived from Poly chain
+    *  @param _pubKeyList   serialized consensus node public key list
+    *  @param _sigList      consensus node signature list
+    *  @return              return two element: next book keeper, consensus node signer addresses
+    */
+    function verifyPubkey(bytes memory _pubKeyList) internal pure returns (bytes20, address[] memory) {
+        require(_pubKeyList.length % POLYCHAIN_PUBKEY_LEN == 0, "_pubKeyList length illegal!");
+        uint n = _pubKeyList.length / POLYCHAIN_PUBKEY_LEN;
+        require(n >= 1, "too short _pubKeyList!");
+        return _getBookKeeper(n, n - (n - 1) / 3, _pubKeyList);
+    }
+
+    /* @notice              Verify Poly chain consensus node signature
+    *  @param _rawHeader    Poly chain block header raw bytes
+    *  @param _sigList      consensus node signature list
+    *  @param _keepers      addresses corresponding with Poly chain book keepers' public keys
+    *  @param _m            minimum signature number
+    *  @return              true or false
+    */
+    function verifySig(bytes memory _rawHeader, bytes memory _sigList, address[] memory _keepers, uint _m) internal pure returns (bool){
+        bytes32 hash = getHeaderHash(_rawHeader);
+
+        uint sigCount = _sigList.length.div(POLYCHAIN_SIGNATURE_LEN);
+        address[] memory signers = new address[](sigCount);
+        bytes32 r;
+        bytes32 s;
+        uint8 v;
+        for(uint j = 0; j  < sigCount; j++){
+            r = Utils.bytesToBytes32(Utils.slice(_sigList, j*POLYCHAIN_SIGNATURE_LEN, 32));
+            s =  Utils.bytesToBytes32(Utils.slice(_sigList, j*POLYCHAIN_SIGNATURE_LEN + 32, 32));
+            v =  uint8(_sigList[j*POLYCHAIN_SIGNATURE_LEN + 64]) + 27;
+            signers[j] =  ecrecover(sha256(abi.encodePacked(hash)), v, r, s);
+            if (signers[j] == address(0)) return false;
+        }
+        return Utils.containMAddresses(_keepers, signers, _m);
+    }
+    
+
+    /* @notice               Serialize Poly chain book keepers' info in Ethereum addresses format into raw bytes
+    *  @param keepersBytes   The serialized addresses
+    *  @return               serialized bytes result
+    */
+    function serializeKeepers(address[] memory keepers) internal pure returns (bytes memory) {
+        uint256 keeperLen = keepers.length;
+        bytes memory keepersBytes = ZeroCopySink.WriteUint64(uint64(keeperLen));
+        for(uint i = 0; i < keeperLen; i++) {
+            keepersBytes = abi.encodePacked(keepersBytes, ZeroCopySink.WriteVarBytes(Utils.addressToBytes(keepers[i])));
+        }
+        return keepersBytes;
+    }
+
+    /* @notice               Deserialize bytes into Ethereum addresses
+    *  @param keepersBytes   The serialized addresses derived from Poly chain book keepers in bytes format
+    *  @return               addresses
+    */
+    function deserializeKeepers(bytes memory keepersBytes) internal pure returns (address[] memory) {
+        uint256 off = 0;
+        uint64 keeperLen;
+        (keeperLen, off) = ZeroCopySource.NextUint64(keepersBytes, off);
+        address[] memory keepers = new address[](keeperLen);
+        bytes memory keeperBytes;
+        for(uint i = 0; i < keeperLen; i++) {
+            (keeperBytes, off) = ZeroCopySource.NextVarBytes(keepersBytes, off);
+            keepers[i] = Utils.bytesToAddress(keeperBytes);
+        }
+        return keepers;
+    }
+
+    /* @notice               Deserialize Poly chain transaction raw value
+    *  @param _valueBs       Poly chain transaction raw bytes
+    *  @return               ToMerkleValue struct
+    */
+    function deserializeMerkleValue(bytes memory _valueBs) internal pure returns (ToMerkleValue memory) {
+        ToMerkleValue memory toMerkleValue;
+        uint256 off = 0;
+
+        (toMerkleValue.txHash, off) = ZeroCopySource.NextVarBytes(_valueBs, off);
+
+        (toMerkleValue.fromChainID, off) = ZeroCopySource.NextUint64(_valueBs, off);
+
+        TxParam memory txParam;
+
+        (txParam.txHash, off) = ZeroCopySource.NextVarBytes(_valueBs, off);
+        
+        (txParam.crossChainId, off) = ZeroCopySource.NextVarBytes(_valueBs, off);
+
+        (txParam.fromContract, off) = ZeroCopySource.NextVarBytes(_valueBs, off);
+
+        (txParam.toChainId, off) = ZeroCopySource.NextUint64(_valueBs, off);
+
+        (txParam.toContract, off) = ZeroCopySource.NextVarBytes(_valueBs, off);
+
+        (txParam.method, off) = ZeroCopySource.NextVarBytes(_valueBs, off);
+
+        (txParam.args, off) = ZeroCopySource.NextVarBytes(_valueBs, off);
+        toMerkleValue.makeTxParam = txParam;
+
+        return toMerkleValue;
+    }
+
+    /* @notice            Deserialize Poly chain block header raw bytes
+    *  @param _valueBs    Poly chain block header raw bytes
+    *  @return            Header struct
+    */
+    function deserializeHeader(bytes memory _headerBs) internal pure returns (Header memory) {
+        Header memory header;
+        uint256 off = 0;
+        (header.version, off)  = ZeroCopySource.NextUint32(_headerBs, off);
+
+        (header.chainId, off) = ZeroCopySource.NextUint64(_headerBs, off);
+
+        (header.prevBlockHash, off) = ZeroCopySource.NextHash(_headerBs, off);
+
+        (header.transactionsRoot, off) = ZeroCopySource.NextHash(_headerBs, off);
+
+        (header.crossStatesRoot, off) = ZeroCopySource.NextHash(_headerBs, off);
+
+        (header.blockRoot, off) = ZeroCopySource.NextHash(_headerBs, off);
+
+        (header.timestamp, off) = ZeroCopySource.NextUint32(_headerBs, off);
+
+        (header.height, off) = ZeroCopySource.NextUint32(_headerBs, off);
+
+        (header.consensusData, off) = ZeroCopySource.NextUint64(_headerBs, off);
+
+        (header.consensusPayload, off) = ZeroCopySource.NextVarBytes(_headerBs, off);
+
+        (header.nextBookkeeper, off) = ZeroCopySource.NextBytes20(_headerBs, off);
+
+        return header;
+    }
+
+    /* @notice            Deserialize Poly chain block header raw bytes
+    *  @param rawHeader   Poly chain block header raw bytes
+    *  @return            header hash same as Poly chain
+    */
+    function getHeaderHash(bytes memory rawHeader) internal pure returns (bytes32) {
+        return sha256(abi.encodePacked(sha256(rawHeader)));
+    }
+}
+
+interface IEthCrossChainData {
+    function putCurEpochStartHeight(uint32 curEpochStartHeight) external returns (bool);
+    function getCurEpochStartHeight() external view returns (uint32);
+    function putCurEpochConPubKeyBytes(bytes calldata curEpochPkBytes) external returns (bool);
+    function getCurEpochConPubKeyBytes() external view returns (bytes memory);
+    function markFromChainTxExist(uint64 fromChainId, bytes32 fromChainTx) external returns (bool);
+    function checkIfFromChainTxExist(uint64 fromChainId, bytes32 fromChainTx) external view returns (bool);
+    function getEthTxHashIndex() external view returns (uint256);
+    function putEthTxHash(bytes32 ethTxHash) external returns (bool);
+    function putExtraData(bytes32 key1, bytes32 key2, bytes calldata value) external returns (bool);
+    function getExtraData(bytes32 key1, bytes32 key2) external view returns (bytes memory);
+    function transferOwnership(address newOwner) external;
+    function pause() external returns (bool);
+    function unpause() external returns (bool);
+    function paused() external view returns (bool);
+    // Not used currently by ECCM
+    function getEthTxHash(uint256 ethTxHashIndex) external view returns (bytes32);
+}
+
+interface IUpgradableECCM is IOwnable, IPausable {
+    function pause() external returns (bool);
+    function unpause() external returns (bool);
+    function upgradeToNew(address) external returns (bool);
+    function setChainId(uint64 _newChainId) external returns (bool);
+}
+
+
+interface IEthCrossChainManager {
+    function crossChain(uint64 _toChainId, bytes calldata _toContract, bytes calldata _method, bytes calldata _txData) external returns (bool);
+}
+
+contract UpgradableECCM is IUpgradableECCM, Ownable, Pausable {
+    address public EthCrossChainDataAddress;
+    uint64 public chainId;
+
+    constructor (address ethCrossChainDataAddr, uint64 _chainId) Pausable() Ownable() {
+        EthCrossChainDataAddress = ethCrossChainDataAddr;
+        chainId = _chainId;
+    }
+    function pause() onlyOwner public returns (bool) {
+        if (!paused()) {
+            _pause();
+        }
+        IEthCrossChainData eccd = IEthCrossChainData(EthCrossChainDataAddress);
+        if (!eccd.paused()) {
+            require(eccd.pause(), "pause EthCrossChainData contract failed");
+        }
+        return true;
+    }
+
+    function unpause() onlyOwner public returns (bool) {
+        if (paused()) {
+            _unpause();
+        }
+        IEthCrossChainData eccd = IEthCrossChainData(EthCrossChainDataAddress);
+        if (eccd.paused()) {
+            require(eccd.unpause(), "unpause EthCrossChainData contract failed");
+        }
+        return true;
+    }
+
+    // if we want to upgrade this contract, we need to invoke this method 
+    function upgradeToNew(address newEthCrossChainManagerAddress) whenPaused onlyOwner public returns (bool) {
+        IEthCrossChainData eccd = IEthCrossChainData(EthCrossChainDataAddress);
+        eccd.transferOwnership(newEthCrossChainManagerAddress);
+        return true;
+    }
+    
+    function setChainId(uint64 _newChainId) whenPaused onlyOwner public returns (bool) {
+        chainId = _newChainId;
+        return true;
+    }
+}
+
+contract EthCrossChainManager is IEthCrossChainManager, UpgradableECCM {
+    using SafeMath for uint256;
+    
+    address public whiteLister;
+    mapping(address => bool) public whiteListFromContract;
+    mapping(address => mapping(bytes => bool)) public whiteListContractMethodMap;
+
+    event InitGenesisBlockEvent(uint256 height, bytes rawHeader);
+    event ChangeBookKeeperEvent(uint256 height, bytes rawHeader);
+    event CrossChainEvent(address indexed sender, bytes txId, address proxyOrAssetContract, uint64 toChainId, bytes toContract, bytes rawdata);
+    event VerifyHeaderAndExecuteTxEvent(uint64 fromChainID, bytes toContract, bytes crossChainTxHash, bytes fromChainTxHash);
+    constructor(
+        address _eccd, 
+        uint64 _chainId, 
+        address[] memory fromContractWhiteList, 
+        bytes[] memory contractMethodWhiteList
+    ) UpgradableECCM(_eccd,_chainId)  {
+        whiteLister = msg.sender;
+        for (uint i=0;i<fromContractWhiteList.length;i++) {
+            whiteListFromContract[fromContractWhiteList[i]] = true;
+        }
+        for (uint i=0;i<contractMethodWhiteList.length;i++) {
+            (address toContract,bytes[] memory methods) = abi.decode(contractMethodWhiteList[i],(address,bytes[]));
+            for (uint j=0;j<methods.length;j++) {
+                whiteListContractMethodMap[toContract][methods[j]] = true;
+            }
+        }
+    }
+    
+    modifier onlyWhiteLister() {
+        require(msg.sender == whiteLister, "Not whiteLister");
+        _;
+    }
+
+    function setWhiteLister(address newWL) public onlyWhiteLister {
+        require(newWL!=address(0), "Can not transfer to address(0)");
+        whiteLister = newWL;
+    }
+    
+    function setFromContractWhiteList(address[] memory fromContractWhiteList) public onlyWhiteLister {
+        for (uint i=0;i<fromContractWhiteList.length;i++) {
+            whiteListFromContract[fromContractWhiteList[i]] = true;
+        }
+    }
+    
+    function removeFromContractWhiteList(address[] memory fromContractWhiteList) public onlyWhiteLister {
+        for (uint i=0;i<fromContractWhiteList.length;i++) {
+            whiteListFromContract[fromContractWhiteList[i]] = false;
+        }
+    }
+    
+    function setContractMethodWhiteList(bytes[] memory contractMethodWhiteList) public onlyWhiteLister {
+        for (uint i=0;i<contractMethodWhiteList.length;i++) {
+            (address toContract,bytes[] memory methods) = abi.decode(contractMethodWhiteList[i],(address,bytes[]));
+            for (uint j=0;j<methods.length;j++) {
+                whiteListContractMethodMap[toContract][methods[j]] = true;
+            }
+        }
+    }
+    
+    function removeContractMethodWhiteList(bytes[] memory contractMethodWhiteList) public onlyWhiteLister {
+        for (uint i=0;i<contractMethodWhiteList.length;i++) {
+            (address toContract,bytes[] memory methods) = abi.decode(contractMethodWhiteList[i],(address,bytes[]));
+            for (uint j=0;j<methods.length;j++) {
+                whiteListContractMethodMap[toContract][methods[j]] = false;
+            }
+        }
+    }
+
+    /* @notice              sync Poly chain genesis block header to smart contrat
+    *  @dev                 this function can only be called once, nextbookkeeper of rawHeader can't be empty
+    *  @param rawHeader     Poly chain genesis block raw header or raw Header including switching consensus peers info
+    *  @return              true or false
+    */
+    function initGenesisBlock(bytes memory rawHeader, bytes memory pubKeyList) whenNotPaused public returns(bool) {
+        // Load Ethereum cross chain data contract
+        IEthCrossChainData eccd = IEthCrossChainData(EthCrossChainDataAddress);
+        
+        // Make sure the contract has not been initialized before
+        require(eccd.getCurEpochConPubKeyBytes().length == 0, "EthCrossChainData contract has already been initialized!");
+        
+        // Parse header and convit the public keys into nextBookKeeper and compare it with header.nextBookKeeper to verify the validity of signature
+        ECCUtils.Header memory header = ECCUtils.deserializeHeader(rawHeader);
+        (bytes20 nextBookKeeper, address[] memory keepers) = ECCUtils.verifyPubkey(pubKeyList);
+        require(header.nextBookkeeper == nextBookKeeper, "NextBookers illegal");
+        
+        // Record current epoch start height and public keys (by storing them in address format)
+        require(eccd.putCurEpochStartHeight(header.height), "Save Poly chain current epoch start height to Data contract failed!");
+        require(eccd.putCurEpochConPubKeyBytes(ECCUtils.serializeKeepers(keepers)), "Save Poly chain current epoch book keepers to Data contract failed!");
+        
+        // Fire the event
+        emit InitGenesisBlockEvent(header.height, rawHeader);
+        return true;
+    }
+    
+    /* @notice              change Poly chain consensus book keeper
+    *  @param rawHeader     Poly chain change book keeper block raw header
+    *  @param pubKeyList    Poly chain consensus nodes public key list
+    *  @param sigList       Poly chain consensus nodes signature list
+    *  @return              true or false
+    */
+    function changeBookKeeper(bytes memory rawHeader, bytes memory pubKeyList, bytes memory sigList) whenNotPaused public returns(bool) {
+        // Load Ethereum cross chain data contract
+        ECCUtils.Header memory header = ECCUtils.deserializeHeader(rawHeader);
+        IEthCrossChainData eccd = IEthCrossChainData(EthCrossChainDataAddress);
+        
+        // Make sure rawHeader.height is higher than recorded current epoch start height
+        uint64 curEpochStartHeight = eccd.getCurEpochStartHeight();
+        require(header.height > curEpochStartHeight, "The height of header is lower than current epoch start height!");
+        
+        // Ensure the rawHeader is the key header including info of switching consensus peers by containing non-empty nextBookKeeper field
+        require(header.nextBookkeeper != bytes20(0), "The nextBookKeeper of header is empty");
+        
+        // Verify signature of rawHeader comes from pubKeyList
+        address[] memory polyChainBKs = ECCUtils.deserializeKeepers(eccd.getCurEpochConPubKeyBytes());
+        uint n = polyChainBKs.length;
+        require(ECCUtils.verifySig(rawHeader, sigList, polyChainBKs, n - (n - 1) / 3), "Verify signature failed!");
+        
+        // Convert pubKeyList into ethereum address format and make sure the compound address from the converted ethereum addresses
+        // equals passed in header.nextBooker
+        (bytes20 nextBookKeeper, address[] memory keepers) = ECCUtils.verifyPubkey(pubKeyList);
+        require(header.nextBookkeeper == nextBookKeeper, "NextBookers illegal");
+        
+        // update current epoch start height of Poly chain and current epoch consensus peers book keepers addresses
+        require(eccd.putCurEpochStartHeight(header.height), "Save MC LatestHeight to Data contract failed!");
+        require(eccd.putCurEpochConPubKeyBytes(ECCUtils.serializeKeepers(keepers)), "Save Poly chain book keepers bytes to Data contract failed!");
+        
+        // Fire the change book keeper event
+        emit ChangeBookKeeperEvent(header.height, rawHeader);
+        return true;
+    }
+
+
+    /* @notice              ERC20 token cross chain to other blockchain.
+    *                       this function push tx event to blockchain
+    *  @param toChainId     Target chain id
+    *  @param toContract    Target smart contract address in target block chain
+    *  @param txData        Transaction data for target chain, include to_address, amount
+    *  @return              true or false
+    */
+    function crossChain(uint64 toChainId, bytes calldata toContract, bytes calldata method, bytes calldata txData) whenNotPaused external returns (bool) {
+        // Only allow whitelist contract to call
+        require(whiteListFromContract[msg.sender],"Invalid from contract");
+        
+        // Load Ethereum cross chain data contract
+        IEthCrossChainData eccd = IEthCrossChainData(EthCrossChainDataAddress);
+        
+        // To help differentiate two txs, the ethTxHashIndex is increasing automatically
+        uint256 txHashIndex = eccd.getEthTxHashIndex();
+        
+        // Convert the uint256 into bytes
+        bytes memory paramTxHash = Utils.uint256ToBytes(txHashIndex);
+        
+        // Construct the makeTxParam, and put the hash info storage, to help provide proof of tx existence
+        bytes memory rawParam = abi.encodePacked(ZeroCopySink.WriteVarBytes(paramTxHash),
+            ZeroCopySink.WriteVarBytes(abi.encodePacked(sha256(abi.encodePacked(address(this), paramTxHash)))),
+            ZeroCopySink.WriteVarBytes(Utils.addressToBytes(msg.sender)),
+            ZeroCopySink.WriteUint64(toChainId),
+            ZeroCopySink.WriteVarBytes(toContract),
+            ZeroCopySink.WriteVarBytes(method),
+            ZeroCopySink.WriteVarBytes(txData)
+        );
+        
+        // Must save it in the storage to be included in the proof to be verified.
+        require(eccd.putEthTxHash(keccak256(rawParam)), "Save ethTxHash by index to Data contract failed!");
+        
+        // Fire the cross chain event denoting there is a cross chain request from Ethereum network to other public chains through Poly chain network
+        emit CrossChainEvent(tx.origin, paramTxHash, msg.sender, toChainId, toContract, rawParam);
+        return true;
+    }
+    /* @notice              Verify Poly chain header and proof, execute the cross chain tx from Poly chain to Ethereum
+    *  @param proof         Poly chain tx merkle proof
+    *  @param rawHeader     The header containing crossStateRoot to verify the above tx merkle proof
+    *  @param headerProof   The header merkle proof used to verify rawHeader
+    *  @param curRawHeader  Any header in current epoch consensus of Poly chain
+    *  @param headerSig     The coverted signature veriable for solidity derived from Poly chain consensus nodes' signature
+    *                       used to verify the validity of curRawHeader
+    *  @return              true or false
+    */
+    function verifyHeaderAndExecuteTx(bytes memory proof, bytes memory rawHeader, bytes memory headerProof, bytes memory curRawHeader,bytes memory headerSig) whenNotPaused public returns (bool){
+        ECCUtils.Header memory header = ECCUtils.deserializeHeader(rawHeader);
+        // Load ehereum cross chain data contract
+        IEthCrossChainData eccd = IEthCrossChainData(EthCrossChainDataAddress);
+        
+        // Get stored consensus public key bytes of current poly chain epoch and deserialize Poly chain consensus public key bytes to address[]
+        address[] memory polyChainBKs = ECCUtils.deserializeKeepers(eccd.getCurEpochConPubKeyBytes());
+
+        uint256 curEpochStartHeight = eccd.getCurEpochStartHeight();
+
+        uint n = polyChainBKs.length;
+        if (header.height >= curEpochStartHeight) {
+            // It's enough to verify rawHeader signature
+            require(ECCUtils.verifySig(rawHeader, headerSig, polyChainBKs, n - ( n - 1) / 3), "Verify poly chain header signature failed!");
+        } else {
+            // We need to verify the signature of curHeader 
+            require(ECCUtils.verifySig(curRawHeader, headerSig, polyChainBKs, n - ( n - 1) / 3), "Verify poly chain current epoch header signature failed!");
+
+            // Then use curHeader.StateRoot and headerProof to verify rawHeader.CrossStateRoot
+            ECCUtils.Header memory curHeader = ECCUtils.deserializeHeader(curRawHeader);
+            bytes memory proveValue = ECCUtils.merkleProve(headerProof, curHeader.blockRoot);
+            require(ECCUtils.getHeaderHash(rawHeader) == Utils.bytesToBytes32(proveValue), "verify header proof failed!");
+        }
+        
+        // Through rawHeader.CrossStatesRoot, the toMerkleValue or cross chain msg can be verified and parsed from proof
+        bytes memory toMerkleValueBs = ECCUtils.merkleProve(proof, header.crossStatesRoot);
+        
+        // Parse the toMerkleValue struct and make sure the tx has not been processed, then mark this tx as processed
+        ECCUtils.ToMerkleValue memory toMerkleValue = ECCUtils.deserializeMerkleValue(toMerkleValueBs);
+        require(!eccd.checkIfFromChainTxExist(toMerkleValue.fromChainID, Utils.bytesToBytes32(toMerkleValue.txHash)), "the transaction has been executed!");
+        require(eccd.markFromChainTxExist(toMerkleValue.fromChainID, Utils.bytesToBytes32(toMerkleValue.txHash)), "Save crosschain tx exist failed!");
+        
+        // Ethereum ChainId is 2, we need to check the transaction is for Ethereum network
+        require(toMerkleValue.makeTxParam.toChainId == chainId, "This Tx is not aiming at this network!");
+        
+        // Obtain the targeting contract, so that Ethereum cross chain manager contract can trigger the executation of cross chain tx on Ethereum side
+        address toContract = Utils.bytesToAddress(toMerkleValue.makeTxParam.toContract);
+        
+        // only invoke PreWhiteListed Contract and method For Now
+        require(whiteListContractMethodMap[toContract][toMerkleValue.makeTxParam.method],"Invalid to contract or method");
+
+        //TODO: check this part to make sure we commit the next line when doing local net UT test
+        require(_executeCrossChainTx(toContract, toMerkleValue.makeTxParam.method, toMerkleValue.makeTxParam.args, toMerkleValue.makeTxParam.fromContract, toMerkleValue.fromChainID), "Execute CrossChain Tx failed!");
+
+        // Fire the cross chain event denoting the executation of cross chain tx is successful,
+        // and this tx is coming from other public chains to current Ethereum network
+        emit VerifyHeaderAndExecuteTxEvent(toMerkleValue.fromChainID, toMerkleValue.makeTxParam.toContract, toMerkleValue.txHash, toMerkleValue.makeTxParam.txHash);
+
+        return true;
+    }
+    
+    /* @notice                  Dynamically invoke the targeting contract, and trigger executation of cross chain tx on Ethereum side
+    *  @param _toContract       The targeting contract that will be invoked by the Ethereum Cross Chain Manager contract
+    *  @param _method           At which method will be invoked within the targeting contract
+    *  @param _args             The parameter that will be passed into the targeting contract
+    *  @param _fromContractAddr From chain smart contract address
+    *  @param _fromChainId      Indicate from which chain current cross chain tx comes 
+    *  @return                  true or false
+    */
+    function _executeCrossChainTx(address _toContract, bytes memory _method, bytes memory _args, bytes memory _fromContractAddr, uint64 _fromChainId) internal returns (bool){
+        // Ensure the targeting contract gonna be invoked is indeed a contract rather than a normal account address
+        require(Utils.isContract(_toContract), "The passed in address is not a contract!");
+        bytes memory returnData;
+        bool success;
+        
+        // The returnData will be bytes32, the last byte must be 01;
+        (success, returnData) = _toContract.call(abi.encodePacked(bytes4(keccak256(abi.encodePacked(_method, "(bytes,bytes,uint64)"))), abi.encode(_args, _fromContractAddr, _fromChainId)));
+        
+        // Ensure the executation is successful
+        require(success == true, "EthCrossChain call business contract failed");
+        
+        // Ensure the returned value is true
+        require(returnData.length != 0, "No return value from business contract!");
+        (bool res,) = ZeroCopySource.NextBool(returnData, 31);
+        require(res == true, "EthCrossChain call business contract return is not true");
+        
+        return true;
+    }
+}
diff --git a/smart-contracts/test/zilbridge/infrastructure/ccmProxy.sol b/smart-contracts/test/zilbridge/infrastructure/ccmProxy.sol
new file mode 100644
index 0000000..08a27f6
--- /dev/null
+++ b/smart-contracts/test/zilbridge/infrastructure/ccmProxy.sol
@@ -0,0 +1,265 @@
+/**
+ *Submitted for verification at Etherscan.io on 2023-02-06
+*/
+
+// File: eth-contracts/contracts/core/cross_chain_manager/interface/IEthCrossChainManagerProxy.sol
+
+//pragma solidity ^0.5.0;
+pragma solidity ^0.8.20;
+
+/**
+ * @dev Interface of the EthCrossChainManagerProxy for business contract like LockProxy to obtain the reliable EthCrossChainManager contract hash.
+ */
+interface IEthCrossChainManagerProxy {
+    function getEthCrossChainManager() external view returns (address);
+}
+
+// File: eth-contracts/contracts/core/cross_chain_manager/interface/IUpgradableECCM.sol
+
+/**
+ * @dev Interface of upgradableECCM to make ECCM be upgradable, the implementation is in UpgradableECCM.sol
+ */
+interface IUpgradableECCM {
+    function pause() external returns (bool);
+    function unpause() external returns (bool);
+    function paused() external view returns (bool);
+    function upgradeToNew(address) external returns (bool);
+    function isOwner() external view returns (bool);
+    function setChainId(uint64 _newChainId) external returns (bool);
+}
+
+// File: eth-contracts/contracts/libs/GSN/Context.sol
+
+
+/*
+ * @dev Provides information about the current execution context, including the
+ * sender of the transaction and its data. While these are generally available
+ * via msg.sender and msg.data, they should not be accessed in such a direct
+ * manner, since when dealing with GSN meta-transactions the account sending and
+ * paying for execution may not be the actual sender (as far as an application
+ * is concerned).
+ *
+ * This contract is only required for intermediate, library-like contracts.
+ * Refer from https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/GSN/Context.sol
+ */
+abstract contract Context {
+    // Empty internal constructor, to prevent people from mistakenly deploying
+    // an instance of this contract, which should be used via inheritance.
+    constructor ()  { }
+    // solhint-disable-previous-line no-empty-blocks
+
+    function _msgSender() internal view returns (address payable) {
+      return payable(msg.sender);
+    }
+
+    function _msgData() internal view returns (bytes memory) {
+        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
+        return msg.data;
+    }
+}
+
+// File: eth-contracts/contracts/libs/lifecycle/Pausable.sol
+
+
+/**
+ * @dev Contract module which allows children to implement an emergency stop
+ * mechanism that can be triggered by an authorized account.
+ *
+ * This module is used through inheritance. It will make available the
+ * modifiers `whenNotPaused` and `whenPaused`, which can be applied to
+ * the functions of your contract. Note that they will not be pausable by
+ * simply including this module, only once the modifiers are put in place.
+ */
+abstract contract Pausable is Context {
+    /**
+     * @dev Emitted when the pause is triggered by a pauser (`account`).
+     */
+    event Paused(address account);
+
+    /**
+     * @dev Emitted when the pause is lifted by a pauser (`account`).
+     */
+    event Unpaused(address account);
+
+    bool private _paused;
+
+    /**
+     * @dev Initializes the contract in unpaused state.
+     */
+    constructor () {
+        _paused = false;
+    }
+
+    /**
+     * @dev Returns true if the contract is paused, and false otherwise.
+     */
+    function paused() public view returns (bool) {
+        return _paused;
+    }
+
+    /**
+     * @dev Modifier to make a function callable only when the contract is not paused.
+     */
+    modifier whenNotPaused() {
+        require(!_paused, "Pausable: paused");
+        _;
+    }
+
+    /**
+     * @dev Modifier to make a function callable only when the contract is paused.
+     */
+    modifier whenPaused() {
+        require(_paused, "Pausable: not paused");
+        _;
+    }
+
+    /**
+     * @dev Called to pause, triggers stopped state.
+     */
+    function _pause() internal whenNotPaused {
+        _paused = true;
+        emit Paused(_msgSender());
+    }
+
+    /**
+     * @dev Called to unpause, returns to normal state.
+     */
+    function _unpause() internal whenPaused {
+        _paused = false;
+        emit Unpaused(_msgSender());
+    }
+}
+
+// File: eth-contracts/contracts/libs/ownership/Ownable.sol
+
+
+/**
+ * @dev Contract module which provides a basic access control mechanism, where
+ * there is an account (an owner) that can be granted exclusive access to
+ * specific functions.
+ *
+ * This module is used through inheritance. It will make available the modifier
+ * `onlyOwner`, which can be applied to your functions to restrict their use to
+ * the owner.
+ */
+abstract contract Ownable is Context {
+    address private _owner;
+
+    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
+
+    /**
+     * @dev Initializes the contract setting the deployer as the initial owner.
+     */
+    constructor () {
+        address msgSender = _msgSender();
+        _owner = msgSender;
+        emit OwnershipTransferred(address(0), msgSender);
+    }
+
+    /**
+     * @dev Returns the address of the current owner.
+     */
+    function owner() public view returns (address) {
+        return _owner;
+    }
+
+    /**
+     * @dev Throws if called by any account other than the owner.
+     */
+    modifier onlyOwner() {
+        require(isOwner(), "Ownable: caller is not the owner");
+        _;
+    }
+
+    /**
+     * @dev Returns true if the caller is the current owner.
+     */
+    function isOwner() public view returns (bool) {
+        return _msgSender() == _owner;
+    }
+
+    /**
+     * @dev Leaves the contract without owner. It will not be possible to call
+     * `onlyOwner` functions anymore. Can only be called by the current owner.
+     *
+     * NOTE: Renouncing ownership will leave the contract without an owner,
+     * thereby removing any functionality that is only available to the owner.
+     */
+    function renounceOwnership() public onlyOwner {
+        emit OwnershipTransferred(_owner, address(0));
+        _owner = address(0);
+    }
+
+    /**
+     * @dev Transfers ownership of the contract to a new account (`newOwner`).
+     * Can only be called by the current owner.
+     */
+    function transferOwnership(address newOwner) public  onlyOwner {
+        _transferOwnership(newOwner);
+    }
+
+    /**
+     * @dev Transfers ownership of the contract to a new account (`newOwner`).
+     */
+    function _transferOwnership(address newOwner) internal {
+        require(newOwner != address(0), "Ownable: new owner is the zero address");
+        emit OwnershipTransferred(_owner, newOwner);
+        _owner = newOwner;
+    }
+}
+
+// File: eth-contracts/contracts/core/cross_chain_manager/upgrade/EthCrossChainManagerProxy.sol
+
+
+
+
+
+
+contract EthCrossChainManagerProxy is IEthCrossChainManagerProxy, Ownable, Pausable {
+    address private EthCrossChainManagerAddr_;
+    
+    constructor(address _ethCrossChainManagerAddr) {
+        EthCrossChainManagerAddr_ = _ethCrossChainManagerAddr;
+    }
+    
+    function pause() onlyOwner public returns (bool) {
+        if (paused()) {
+            return true;
+        }
+        _pause();
+        return true;
+    }
+    function unpause() onlyOwner public returns (bool) {
+        if (!paused()) {
+            return true;
+        }
+        _unpause();
+        return true;
+    }
+    function pauseEthCrossChainManager() onlyOwner whenNotPaused public returns (bool) {
+        IUpgradableECCM eccm = IUpgradableECCM(EthCrossChainManagerAddr_);
+        require(pause(), "pause EthCrossChainManagerProxy contract failed!");
+        require(eccm.pause(), "pause EthCrossChainManager contract failed!");
+        return true;
+    }
+    function upgradeEthCrossChainManager(address _newEthCrossChainManagerAddr) onlyOwner whenPaused public returns (bool) {
+        IUpgradableECCM eccm = IUpgradableECCM(EthCrossChainManagerAddr_);
+        if (!eccm.paused()) {
+            require(eccm.pause(), "Pause old EthCrossChainManager contract failed!");
+        }
+        require(eccm.upgradeToNew(_newEthCrossChainManagerAddr), "EthCrossChainManager upgradeToNew failed!");
+        IUpgradableECCM neweccm = IUpgradableECCM(_newEthCrossChainManagerAddr);
+        require(neweccm.isOwner(), "EthCrossChainManagerProxy is not owner of new EthCrossChainManager contract");
+        EthCrossChainManagerAddr_ = _newEthCrossChainManagerAddr;
+        return true;
+    }
+    function unpauseEthCrossChainManager() onlyOwner whenPaused public returns (bool) {
+        IUpgradableECCM eccm = IUpgradableECCM(EthCrossChainManagerAddr_);
+        require(eccm.unpause(), "unpause EthCrossChainManager contract failed!");
+        require(unpause(), "unpause EthCrossChainManagerProxy contract failed!");
+        return true;
+    }
+    function getEthCrossChainManager() whenNotPaused public view returns (address) {
+        return EthCrossChainManagerAddr_;
+    }
+}
diff --git a/smart-contracts/test/zilbridge/infrastructure/ethCrossChainData.sol b/smart-contracts/test/zilbridge/infrastructure/ethCrossChainData.sol
new file mode 100644
index 0000000..0c71567
--- /dev/null
+++ b/smart-contracts/test/zilbridge/infrastructure/ethCrossChainData.sol
@@ -0,0 +1,316 @@
+/**
+ *Submitted for verification at Etherscan.io on 2023-02-06
+*/
+
+// File: eth-contracts/contracts/core/cross_chain_manager/interface/IEthCrossChainData.sol
+
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.2;
+
+
+interface IPausable {
+  function paused() external view returns (bool);
+  function pause() external returns (bool);
+  function unpause() external returns (bool);
+}
+
+interface IOwnable {
+  function isOwner() external view returns (bool);
+  function transferOwnership(address newOwner) external;
+}
+
+
+/**
+ * @dev Interface of the EthCrossChainData contract, the implementation is in EthCrossChainData.sol
+ */
+interface IEthCrossChainData is IPausable {
+    function putCurEpochStartHeight(uint32 curEpochStartHeight) external returns (bool);
+    function getCurEpochStartHeight() external view returns (uint32);
+    function putCurEpochConPubKeyBytes(bytes calldata curEpochPkBytes) external returns (bool);
+    function getCurEpochConPubKeyBytes() external view returns (bytes memory);
+    function markFromChainTxExist(uint64 fromChainId, bytes32 fromChainTx) external returns (bool);
+    function checkIfFromChainTxExist(uint64 fromChainId, bytes32 fromChainTx) external view returns (bool);
+    function getEthTxHashIndex() external view returns (uint256);
+    function putEthTxHash(bytes32 ethTxHash) external returns (bool);
+    function putExtraData(bytes32 key1, bytes32 key2, bytes calldata value) external returns (bool);
+    function getExtraData(bytes32 key1, bytes32 key2) external view returns (bytes memory);
+    // function transferOwnership(address newOwner) external;
+    // Not used currently by ECCM
+    function getEthTxHash(uint256 ethTxHashIndex) external view returns (bytes32);
+}
+// File: eth-contracts/contracts/libs/GSN/Context.sol
+
+/*
+ * @dev Provides information about the current execution context, including the
+ * sender of the transaction and its data. While these are generally available
+ * via msg.sender and msg.data, they should not be accessed in such a direct
+ * manner, since when dealing with GSN meta-transactions the account sending and
+ * paying for execution may not be the actual sender (as far as an application
+ * is concerned).
+ *
+ * This contract is only required for intermediate, library-like contracts.
+ * Refer from https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/GSN/Context.sol
+ */
+abstract contract Context {
+    // solhint-disable-previous-line no-empty-blocks
+
+    function _msgSender() internal view returns (address payable) {
+      return payable(msg.sender);
+    }
+
+    function _msgData() internal view returns (bytes memory) {
+        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
+        return msg.data;
+    }
+}
+
+// File: eth-contracts/contracts/libs/lifecycle/Pausable.sol
+
+/**
+ * @dev Contract module which allows children to implement an emergency stop
+ * mechanism that can be triggered by an authorized account.
+ *
+ * This module is used through inheritance. It will make available the
+ * modifiers `whenNotPaused` and `whenPaused`, which can be applied to
+ * the functions of your contract. Note that they will not be pausable by
+ * simply including this module, only once the modifiers are put in place.
+ */
+abstract contract Pausable is Context, IPausable {
+    /**
+     * @dev Emitted when the pause is triggered by a pauser (`account`).
+     */
+    event Paused(address account);
+
+  function paused() public view returns (bool) {
+        return _paused;
+    }
+    /**
+     * @dev Emitted when the pause is lifted by a pauser (`account`).
+     */
+    event Unpaused(address account);
+
+    bool private _paused;
+
+    /**
+     * @dev Initializes the contract in unpaused state.
+     */
+    constructor () {
+        _paused = false;
+    }
+
+    /**
+     * @dev Modifier to make a function callable only when the contract is not paused.
+     */
+    modifier whenNotPaused() {
+        require(!_paused, "Pausable: paused");
+        _;
+    }
+
+    /**
+     * @dev Modifier to make a function callable only when the contract is paused.
+     */
+    modifier whenPaused() {
+        require(_paused, "Pausable: not paused");
+        _;
+    }
+
+    /**
+     * @dev Called to pause, triggers stopped state.
+     */
+    function _pause() internal whenNotPaused {
+        _paused = true;
+        emit Paused(_msgSender());
+    }
+
+    /**
+     * @dev Called to unpause, returns to normal state.
+     */
+    function _unpause() internal whenPaused {
+        _paused = false;
+        emit Unpaused(_msgSender());
+    }
+}
+
+// File: eth-contracts/contracts/libs/ownership/Ownable.sol
+
+
+
+/**
+ * @dev Contract module which provides a basic access control mechanism, where
+ * there is an account (an owner) that can be granted exclusive access to
+ * specific functions.
+ *
+ * This module is used through inheritance. It will make available the modifier
+ * `onlyOwner`, which can be applied to your functions to restrict their use to
+ * the owner.
+ */
+abstract contract Ownable is Context, IOwnable {
+    address private _owner;
+
+    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
+
+    /**
+     * @dev Initializes the contract setting the deployer as the initial owner.
+     */
+    constructor () {
+        address msgSender = _msgSender();
+        _owner = msgSender;
+        emit OwnershipTransferred(address(0), msgSender);
+    }
+
+    /**
+     * @dev Returns the address of the current owner.
+     */
+    function owner() public view returns (address) {
+        return _owner;
+    }
+
+    /**
+     * @dev Throws if called by any account other than the owner.
+     */
+    modifier onlyOwner() {
+        require(isOwner(), "Ownable: caller is not the owner");
+        _;
+    }
+
+    /**
+     * @dev Returns true if the caller is the current owner.
+     */
+    function isOwner() public view returns (bool) {
+        return _msgSender() == _owner;
+    }
+
+    /**
+     * @dev Leaves the contract without owner. It will not be possible to call
+     * `onlyOwner` functions anymore. Can only be called by the current owner.
+     *
+     * NOTE: Renouncing ownership will leave the contract without an owner,
+     * thereby removing any functionality that is only available to the owner.
+     */
+    function renounceOwnership() public onlyOwner {
+        emit OwnershipTransferred(_owner, address(0));
+        _owner = address(0);
+    }
+
+    /**
+     * @dev Transfers ownership of the contract to a new account (`newOwner`).
+     * Can only be called by the current owner.
+     */
+    function transferOwnership(address newOwner) public  onlyOwner {
+        _transferOwnership(newOwner);
+    }
+
+    /**
+     * @dev Transfers ownership of the contract to a new account (`newOwner`).
+     */
+    function _transferOwnership(address newOwner) internal {
+        require(newOwner != address(0), "Ownable: new owner is the zero address");
+        emit OwnershipTransferred(_owner, newOwner);
+        _owner = newOwner;
+    }
+}
+
+// File: eth-contracts/contracts/core/cross_chain_manager/data/EthCrossChainData.sol
+
+
+
+
+
+contract EthCrossChainData is IEthCrossChainData, Ownable, Pausable {
+    /*
+     Ethereum cross chain tx hash indexed by the automatically increased index.
+     This map exists for the reason that Poly chain can verify the existence of 
+     cross chain request tx coming from Ethereum
+    */
+    mapping(uint256 => bytes32) public EthToPolyTxHashMap;
+    // This index records the current Map length
+    uint256 public EthToPolyTxHashIndex;
+
+    /* 
+     When Poly chain switches the consensus epoch book keepers, the consensus peers public keys of Poly chain should be 
+     changed into no-compressed version so that solidity smart contract can convert it to address type and 
+     verify the signature derived from Poly chain account signature.
+     ConKeepersPkBytes means Consensus book Keepers Public Key Bytes
+    */
+    bytes public ConKeepersPkBytes;
+    
+    // CurEpochStartHeight means Current Epoch Start Height of Poly chain block
+    uint32 public CurEpochStartHeight;
+    
+    // Record the from chain txs that have been processed
+    mapping(uint64 => mapping(bytes32 => bool)) FromChainTxExist;
+    
+    // Extra map for the usage of future potentially
+    mapping(bytes32 => mapping(bytes32 => bytes)) public ExtraData;
+    
+    // Store Current Epoch Start Height of Poly chain block
+    function putCurEpochStartHeight(uint32 curEpochStartHeight) public whenNotPaused onlyOwner returns (bool) {
+        CurEpochStartHeight = curEpochStartHeight;
+        return true;
+    }
+
+    // Get Current Epoch Start Height of Poly chain block
+    function getCurEpochStartHeight() public view returns (uint32) {
+        return CurEpochStartHeight;
+    }
+
+    // Store Consensus book Keepers Public Key Bytes
+    function putCurEpochConPubKeyBytes(bytes memory curEpochPkBytes) public whenNotPaused onlyOwner returns (bool) {
+        ConKeepersPkBytes = curEpochPkBytes;
+        return true;
+    }
+
+    // Get Consensus book Keepers Public Key Bytes
+    function getCurEpochConPubKeyBytes() public view returns (bytes memory) {
+        return ConKeepersPkBytes;
+    }
+
+    // Mark from chain tx fromChainTx as exist or processed
+    function markFromChainTxExist(uint64 fromChainId, bytes32 fromChainTx) public whenNotPaused onlyOwner returns (bool) {
+        FromChainTxExist[fromChainId][fromChainTx] = true;
+        return true;
+    }
+
+    // Check if from chain tx fromChainTx has been processed before
+    function checkIfFromChainTxExist(uint64 fromChainId, bytes32 fromChainTx) public view returns (bool) {
+        return FromChainTxExist[fromChainId][fromChainTx];
+    }
+
+    // Get current recorded index of cross chain txs requesting from Ethereum to other public chains
+    // in order to help cross chain manager contract differenciate two cross chain tx requests
+    function getEthTxHashIndex() public view returns (uint256) {
+        return EthToPolyTxHashIndex;
+    }
+
+    // Store Ethereum cross chain tx hash, increase the index record by 1
+    function putEthTxHash(bytes32 ethTxHash) public whenNotPaused onlyOwner returns (bool) {
+        EthToPolyTxHashMap[EthToPolyTxHashIndex] = ethTxHash;
+        EthToPolyTxHashIndex = EthToPolyTxHashIndex + 1;
+        return true;
+    }
+
+    // Get Ethereum cross chain tx hash indexed by ethTxHashIndex
+    function getEthTxHash(uint256 ethTxHashIndex) public view returns (bytes32) {
+        return EthToPolyTxHashMap[ethTxHashIndex];
+    }
+
+    // Store extra data, which may be used in the future
+    function putExtraData(bytes32 key1, bytes32 key2, bytes memory value) public whenNotPaused onlyOwner returns (bool) {
+        ExtraData[key1][key2] = value;
+        return true;
+    }
+    // Get extra data, which may be used in the future
+    function getExtraData(bytes32 key1, bytes32 key2) public view returns (bytes memory) {
+        return ExtraData[key1][key2];
+    }
+    
+    function pause() onlyOwner whenNotPaused public returns (bool) {
+        _pause();
+        return true;
+    }
+    
+    function unpause() onlyOwner whenPaused public returns (bool) {
+        _unpause();
+        return true;
+    }
+}
diff --git a/smart-contracts/test/zilbridge/infrastructure/lockProxy.sol b/smart-contracts/test/zilbridge/infrastructure/lockProxy.sol
new file mode 100644
index 0000000..27609c0
--- /dev/null
+++ b/smart-contracts/test/zilbridge/infrastructure/lockProxy.sol
@@ -0,0 +1,1884 @@
+/**
+ *Submitted for verification at Etherscan.io on 2020-11-09
+*/
+
+// File: contracts/libs/common/ZeroCopySource.sol
+
+// SPDX-License-Identifier: MIT
+
+pragma solidity 0.8.20;
+
+/**
+ * @dev Wrappers over decoding and deserialization operation from bytes into bassic types in Solidity for PolyNetwork cross chain utility.
+ *
+ * Decode into basic types in Solidity from bytes easily. It's designed to be used
+ * for PolyNetwork cross chain application, and the decoding rules on Ethereum chain
+ * and the encoding rule on other chains should be consistent, and . Here we
+ * follow the underlying deserialization rule with implementation found here:
+ * https://github.com/polynetwork/poly/blob/master/common/zero_copy_source.go
+ *
+ * Using this library instead of the unchecked serialization method can help reduce
+ * the risk of serious bugs and handfule, so it's recommended to use it.
+ *
+ * Please note that risk can be minimized, yet not eliminated.
+ */
+library ZeroCopySource {
+    /* @notice              Read next byte as boolean type starting at offset from buff
+    *  @param buff          Source bytes array
+    *  @param offset        The position from where we read the boolean value
+    *  @return              The the read boolean value and new offset
+    */
+    function NextBool(bytes memory buff, uint256 offset) internal pure returns(bool, uint256) {
+        require(offset + 1 <= buff.length && offset < offset + 1, "Offset exceeds limit");
+        // byte === bytes1
+        bytes1 v;
+        assembly{
+            v := mload(add(add(buff, 0x20), offset))
+        }
+        bool value;
+        if (v == 0x01) {
+		    value = true;
+    	} else if (v == 0x00) {
+            value = false;
+        } else {
+            revert("NextBool value error");
+        }
+        return (value, offset + 1);
+    }
+
+    /* @notice              Read next byte starting at offset from buff
+    *  @param buff          Source bytes array
+    *  @param offset        The position from where we read the byte value
+    *  @return              The read byte value and new offset
+    */
+    function NextByte(bytes memory buff, uint256 offset) internal pure returns (bytes1, uint256) {
+        require(offset + 1 <= buff.length && offset < offset + 1, "NextByte, Offset exceeds maximum");
+        bytes1 v;
+        assembly{
+            v := mload(add(add(buff, 0x20), offset))
+        }
+        return (v, offset + 1);
+    }
+
+    /* @notice              Read next byte as uint8 starting at offset from buff
+    *  @param buff          Source bytes array
+    *  @param offset        The position from where we read the byte value
+    *  @return              The read uint8 value and new offset
+    */
+    function NextUint8(bytes memory buff, uint256 offset) internal pure returns (uint8, uint256) {
+        require(offset + 1 <= buff.length && offset < offset + 1, "NextUint8, Offset exceeds maximum");
+        uint8 v;
+        assembly{
+            let tmpbytes := mload(0x40)
+            let bvalue := mload(add(add(buff, 0x20), offset))
+            mstore8(tmpbytes, byte(0, bvalue))
+            mstore(0x40, add(tmpbytes, 0x01))
+            v := mload(sub(tmpbytes, 0x1f))
+        }
+        return (v, offset + 1);
+    }
+
+    /* @notice              Read next two bytes as uint16 type starting from offset
+    *  @param buff          Source bytes array
+    *  @param offset        The position from where we read the uint16 value
+    *  @return              The read uint16 value and updated offset
+    */
+    function NextUint16(bytes memory buff, uint256 offset) internal pure returns (uint16, uint256) {
+        require(offset + 2 <= buff.length && offset < offset + 2, "NextUint16, offset exceeds maximum");
+
+        uint16 v;
+        assembly {
+            let tmpbytes := mload(0x40)
+            let bvalue := mload(add(add(buff, 0x20), offset))
+            mstore8(tmpbytes, byte(0x01, bvalue))
+            mstore8(add(tmpbytes, 0x01), byte(0, bvalue))
+            mstore(0x40, add(tmpbytes, 0x02))
+            v := mload(sub(tmpbytes, 0x1e))
+        }
+        return (v, offset + 2);
+    }
+
+
+    /* @notice              Read next four bytes as uint32 type starting from offset
+    *  @param buff          Source bytes array
+    *  @param offset        The position from where we read the uint32 value
+    *  @return              The read uint32 value and updated offset
+    */
+    function NextUint32(bytes memory buff, uint256 offset) internal pure returns (uint32, uint256) {
+        require(offset + 4 <= buff.length && offset < offset + 4, "NextUint32, offset exceeds maximum");
+        uint32 v;
+        assembly {
+            let tmpbytes := mload(0x40)
+            let byteLen := 0x04
+            for {
+                let tindex := 0x00
+                let bindex := sub(byteLen, 0x01)
+                let bvalue := mload(add(add(buff, 0x20), offset))
+            } lt(tindex, byteLen) {
+                tindex := add(tindex, 0x01)
+                bindex := sub(bindex, 0x01)
+            }{
+                mstore8(add(tmpbytes, tindex), byte(bindex, bvalue))
+            }
+            mstore(0x40, add(tmpbytes, byteLen))
+            v := mload(sub(tmpbytes, sub(0x20, byteLen)))
+        }
+        return (v, offset + 4);
+    }
+
+    /* @notice              Read next eight bytes as uint64 type starting from offset
+    *  @param buff          Source bytes array
+    *  @param offset        The position from where we read the uint64 value
+    *  @return              The read uint64 value and updated offset
+    */
+    function NextUint64(bytes memory buff, uint256 offset) internal pure returns (uint64, uint256) {
+        require(offset + 8 <= buff.length && offset < offset + 8, "NextUint64, offset exceeds maximum");
+        uint64 v;
+        assembly {
+            let tmpbytes := mload(0x40)
+            let byteLen := 0x08
+            for {
+                let tindex := 0x00
+                let bindex := sub(byteLen, 0x01)
+                let bvalue := mload(add(add(buff, 0x20), offset))
+            } lt(tindex, byteLen) {
+                tindex := add(tindex, 0x01)
+                bindex := sub(bindex, 0x01)
+            }{
+                mstore8(add(tmpbytes, tindex), byte(bindex, bvalue))
+            }
+            mstore(0x40, add(tmpbytes, byteLen))
+            v := mload(sub(tmpbytes, sub(0x20, byteLen)))
+        }
+        return (v, offset + 8);
+    }
+
+    /* @notice              Read next 32 bytes as uint256 type starting from offset,
+                            there are limits considering the numerical limits in multi-chain
+    *  @param buff          Source bytes array
+    *  @param offset        The position from where we read the uint256 value
+    *  @return              The read uint256 value and updated offset
+    */
+    function NextUint255(bytes memory buff, uint256 offset) internal pure returns (uint256, uint256) {
+        require(offset + 32 <= buff.length && offset < offset + 32, "NextUint255, offset exceeds maximum");
+        uint256 v;
+        assembly {
+            let tmpbytes := mload(0x40)
+            let byteLen := 0x20
+            for {
+                let tindex := 0x00
+                let bindex := sub(byteLen, 0x01)
+                let bvalue := mload(add(add(buff, 0x20), offset))
+            } lt(tindex, byteLen) {
+                tindex := add(tindex, 0x01)
+                bindex := sub(bindex, 0x01)
+            }{
+                mstore8(add(tmpbytes, tindex), byte(bindex, bvalue))
+            }
+            mstore(0x40, add(tmpbytes, byteLen))
+            v := mload(tmpbytes)
+        }
+        require(v <= 0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff, "Value exceeds the range");
+        return (v, offset + 32);
+    }
+    /* @notice              Read next variable bytes starting from offset,
+                            the decoding rule coming from multi-chain
+    *  @param buff          Source bytes array
+    *  @param offset        The position from where we read the bytes value
+    *  @return              The read variable bytes array value and updated offset
+    */
+    function NextVarBytes(bytes memory buff, uint256 offset) internal pure returns(bytes memory, uint256) {
+        uint len;
+        (len, offset) = NextVarUint(buff, offset);
+        require(offset + len <= buff.length && offset < offset + len, "NextVarBytes, offset exceeds maximum");
+        bytes memory tempBytes;
+        assembly{
+            switch iszero(len)
+            case 0 {
+                // Get a location of some free memory and store it in tempBytes as
+                // Solidity does for memory variables.
+                tempBytes := mload(0x40)
+
+                // The first word of the slice result is potentially a partial
+                // word read from the original array. To read it, we calculate
+                // the length of that partial word and start copying that many
+                // bytes into the array. The first word we copy will start with
+                // data we don't care about, but the last `lengthmod` bytes will
+                // land at the beginning of the contents of the new array. When
+                // we're done copying, we overwrite the full first word with
+                // the actual length of the slice.
+                let lengthmod := and(len, 31)
+
+                // The multiplication in the next line is necessary
+                // because when slicing multiples of 32 bytes (lengthmod == 0)
+                // the following copy loop was copying the origin's length
+                // and then ending prematurely not copying everything it should.
+                let mc := add(add(tempBytes, lengthmod), mul(0x20, iszero(lengthmod)))
+                let end := add(mc, len)
+
+                for {
+                    // The multiplication in the next line has the same exact purpose
+                    // as the one above.
+                    let cc := add(add(add(buff, lengthmod), mul(0x20, iszero(lengthmod))), offset)
+                } lt(mc, end) {
+                    mc := add(mc, 0x20)
+                    cc := add(cc, 0x20)
+                } {
+                    mstore(mc, mload(cc))
+                }
+
+                mstore(tempBytes, len)
+
+                //update free-memory pointer
+                //allocating the array padded to 32 bytes like the compiler does now
+                mstore(0x40, and(add(mc, 31), not(31)))
+            }
+            //if we want a zero-length slice let's just return a zero-length array
+            default {
+                tempBytes := mload(0x40)
+
+                mstore(0x40, add(tempBytes, 0x20))
+            }
+        }
+
+        return (tempBytes, offset + len);
+    }
+    /* @notice              Read next 32 bytes starting from offset,
+    *  @param buff          Source bytes array
+    *  @param offset        The position from where we read the bytes value
+    *  @return              The read bytes32 value and updated offset
+    */
+    function NextHash(bytes memory buff, uint256 offset) internal pure returns (bytes32 , uint256) {
+        require(offset + 32 <= buff.length && offset < offset + 32, "NextHash, offset exceeds maximum");
+        bytes32 v;
+        assembly {
+            v := mload(add(buff, add(offset, 0x20)))
+        }
+        return (v, offset + 32);
+    }
+
+    /* @notice              Read next 20 bytes starting from offset,
+    *  @param buff          Source bytes array
+    *  @param offset        The position from where we read the bytes value
+    *  @return              The read bytes20 value and updated offset
+    */
+    function NextBytes20(bytes memory buff, uint256 offset) internal pure returns (bytes20 , uint256) {
+        require(offset + 20 <= buff.length && offset < offset + 20, "NextBytes20, offset exceeds maximum");
+        bytes20 v;
+        assembly {
+            v := mload(add(buff, add(offset, 0x20)))
+        }
+        return (v, offset + 20);
+    }
+
+    function NextVarUint(bytes memory buff, uint256 offset) internal pure returns(uint, uint256) {
+        bytes1 v;
+        (v, offset) = NextByte(buff, offset);
+
+        uint value;
+        if (v == 0xFD) {
+            // return NextUint16(buff, offset);
+            (value, offset) = NextUint16(buff, offset);
+            require(value >= 0xFD && value <= 0xFFFF, "NextUint16, value outside range");
+            return (value, offset);
+        } else if (v == 0xFE) {
+            // return NextUint32(buff, offset);
+            (value, offset) = NextUint32(buff, offset);
+            require(value > 0xFFFF && value <= 0xFFFFFFFF, "NextVarUint, value outside range");
+            return (value, offset);
+        } else if (v == 0xFF) {
+            // return NextUint64(buff, offset);
+            (value, offset) = NextUint64(buff, offset);
+            require(value > 0xFFFFFFFF, "NextVarUint, value outside range");
+            return (value, offset);
+        } else{
+            // return (uint8(v), offset);
+            value = uint8(v);
+            require(value < 0xFD, "NextVarUint, value outside range");
+            return (value, offset);
+        }
+    }
+}
+
+// File: contracts/libs/common/ZeroCopySink.sol
+
+
+/**
+ * @dev Wrappers over encoding and serialization operation into bytes from bassic types in Solidity for PolyNetwork cross chain utility.
+ *
+ * Encode basic types in Solidity into bytes easily. It's designed to be used
+ * for PolyNetwork cross chain application, and the encoding rules on Ethereum chain
+ * and the decoding rules on other chains should be consistent. Here we
+ * follow the underlying serialization rule with implementation found here:
+ * https://github.com/polynetwork/poly/blob/master/common/zero_copy_sink.go
+ *
+ * Using this library instead of the unchecked serialization method can help reduce
+ * the risk of serious bugs and handfule, so it's recommended to use it.
+ *
+ * Please note that risk can be minimized, yet not eliminated.
+ */
+library ZeroCopySink {
+    /* @notice          Convert boolean value into bytes
+    *  @param b         The boolean value
+    *  @return          Converted bytes array
+    */
+    function WriteBool(bool b) internal pure returns (bytes memory) {
+        bytes memory buff;
+        assembly{
+            buff := mload(0x40)
+            mstore(buff, 1)
+            switch iszero(b)
+            case 1 {
+                mstore(add(buff, 0x20), shl(248, 0x00))
+                // mstore8(add(buff, 0x20), 0x00)
+            }
+            default {
+                mstore(add(buff, 0x20), shl(248, 0x01))
+                // mstore8(add(buff, 0x20), 0x01)
+            }
+            mstore(0x40, add(buff, 0x21))
+        }
+        return buff;
+    }
+
+    /* @notice          Convert byte value into bytes
+    *  @param b         The byte value
+    *  @return          Converted bytes array
+    */
+    function WriteByte(bytes1 b) internal pure returns (bytes memory) {
+        return WriteUint8(uint8(b));
+    }
+
+    /* @notice          Convert uint8 value into bytes
+    *  @param v         The uint8 value
+    *  @return          Converted bytes array
+    */
+    function WriteUint8(uint8 v) internal pure returns (bytes memory) {
+        bytes memory buff;
+        assembly{
+            buff := mload(0x40)
+            mstore(buff, 1)
+            mstore(add(buff, 0x20), shl(248, v))
+            // mstore(add(buff, 0x20), byte(0x1f, v))
+            mstore(0x40, add(buff, 0x21))
+        }
+        return buff;
+    }
+
+    /* @notice          Convert uint16 value into bytes
+    *  @param v         The uint16 value
+    *  @return          Converted bytes array
+    */
+    function WriteUint16(uint16 v) internal pure returns (bytes memory) {
+        bytes memory buff;
+
+        assembly{
+            buff := mload(0x40)
+            let byteLen := 0x02
+            mstore(buff, byteLen)
+            for {
+                let mindex := 0x00
+                let vindex := 0x1f
+            } lt(mindex, byteLen) {
+                mindex := add(mindex, 0x01)
+                vindex := sub(vindex, 0x01)
+            }{
+                mstore8(add(add(buff, 0x20), mindex), byte(vindex, v))
+            }
+            mstore(0x40, add(buff, 0x22))
+        }
+        return buff;
+    }
+
+    /* @notice          Convert uint32 value into bytes
+    *  @param v         The uint32 value
+    *  @return          Converted bytes array
+    */
+    function WriteUint32(uint32 v) internal pure returns(bytes memory) {
+        bytes memory buff;
+        assembly{
+            buff := mload(0x40)
+            let byteLen := 0x04
+            mstore(buff, byteLen)
+            for {
+                let mindex := 0x00
+                let vindex := 0x1f
+            } lt(mindex, byteLen) {
+                mindex := add(mindex, 0x01)
+                vindex := sub(vindex, 0x01)
+            }{
+                mstore8(add(add(buff, 0x20), mindex), byte(vindex, v))
+            }
+            mstore(0x40, add(buff, 0x24))
+        }
+        return buff;
+    }
+
+    /* @notice          Convert uint64 value into bytes
+    *  @param v         The uint64 value
+    *  @return          Converted bytes array
+    */
+    function WriteUint64(uint64 v) internal pure returns(bytes memory) {
+        bytes memory buff;
+
+        assembly{
+            buff := mload(0x40)
+            let byteLen := 0x08
+            mstore(buff, byteLen)
+            for {
+                let mindex := 0x00
+                let vindex := 0x1f
+            } lt(mindex, byteLen) {
+                mindex := add(mindex, 0x01)
+                vindex := sub(vindex, 0x01)
+            }{
+                mstore8(add(add(buff, 0x20), mindex), byte(vindex, v))
+            }
+            mstore(0x40, add(buff, 0x28))
+        }
+        return buff;
+    }
+
+    /* @notice          Convert limited uint256 value into bytes
+    *  @param v         The uint256 value
+    *  @return          Converted bytes array
+    */
+    function WriteUint255(uint256 v) internal pure returns (bytes memory) {
+        require(v <= 0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff, "Value exceeds uint255 range");
+        bytes memory buff;
+
+        assembly{
+            buff := mload(0x40)
+            let byteLen := 0x20
+            mstore(buff, byteLen)
+            for {
+                let mindex := 0x00
+                let vindex := 0x1f
+            } lt(mindex, byteLen) {
+                mindex := add(mindex, 0x01)
+                vindex := sub(vindex, 0x01)
+            }{
+                mstore8(add(add(buff, 0x20), mindex), byte(vindex, v))
+            }
+            mstore(0x40, add(buff, 0x40))
+        }
+        return buff;
+    }
+
+    /* @notice          Encode bytes format data into bytes
+    *  @param data      The bytes array data
+    *  @return          Encoded bytes array
+    */
+    function WriteVarBytes(bytes memory data) internal pure returns (bytes memory) {
+        uint64 l = uint64(data.length);
+        return abi.encodePacked(WriteVarUint(l), data);
+    }
+
+    function WriteVarUint(uint64 v) internal pure returns (bytes memory) {
+        if (v < 0xFD){
+    		return WriteUint8(uint8(v));
+    	} else if (v <= 0xFFFF) {
+    		return abi.encodePacked(WriteByte(0xFD), WriteUint16(uint16(v)));
+    	} else if (v <= 0xFFFFFFFF) {
+            return abi.encodePacked(WriteByte(0xFE), WriteUint32(uint32(v)));
+    	} else {
+    		return abi.encodePacked(WriteByte(0xFF), WriteUint64(uint64(v)));
+    	}
+    }
+}
+
+// File: contracts/libs/utils/ReentrancyGuard.sol
+
+
+/**
+ * @dev Contract module that helps prevent reentrant calls to a function.
+ *
+ * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
+ * available, which can be applied to functions to make sure there are no nested
+ * (reentrant) calls to them.
+ *
+ * Note that because there is a single `nonReentrant` guard, functions marked as
+ * `nonReentrant` may not call one another. This can be worked around by making
+ * those functions `private`, and then adding `external` `nonReentrant` entry
+ * points to them.
+ *
+ * TIP: If you would like to learn more about reentrancy and alternative ways
+ * to protect against it, check out our blog post
+ * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
+ */
+abstract contract ReentrancyGuard {
+    bool private _notEntered;
+
+    constructor () {
+        // Storing an initial non-zero value makes deployment a bit more
+        // expensive, but in exchange the refund on every call to nonReentrant
+        // will be lower in amount. Since refunds are capped to a percetange of
+        // the total transaction's gas, it is best to keep them low in cases
+        // like this one, to increase the likelihood of the full refund coming
+        // into effect.
+        _notEntered = true;
+    }
+
+    /**
+     * @dev Prevents a contract from calling itself, directly or indirectly.
+     * Calling a `nonReentrant` function from another `nonReentrant`
+     * function is not supported. It is possible to prevent this from happening
+     * by making the `nonReentrant` function external, and make it call a
+     * `private` function that does the actual work.
+     */
+    modifier nonReentrant() {
+        // On the first call to nonReentrant, _notEntered will be true
+        require(_notEntered, "ReentrancyGuard: reentrant call");
+
+        // Any calls to nonReentrant after this point will fail
+        _notEntered = false;
+
+        _;
+
+        // By storing the original value once again, a refund is triggered (see
+        // https://eips.ethereum.org/EIPS/eip-2200)
+        _notEntered = true;
+    }
+}
+
+// File: contracts/libs/utils/Utils.sol
+
+
+library Utils {
+
+    /* @notice      Convert the bytes array to bytes32 type, the bytes array length must be 32
+    *  @param _bs   Source bytes array
+    *  @return      bytes32
+    */
+    function bytesToBytes32(bytes memory _bs) internal pure returns (bytes32 value) {
+        require(_bs.length == 32, "bytes length is not 32.");
+        assembly {
+            // load 32 bytes from memory starting from position _bs + 0x20 since the first 0x20 bytes stores _bs length
+            value := mload(add(_bs, 0x20))
+        }
+    }
+
+    /* @notice      Convert bytes to uint256
+    *  @param _b    Source bytes should have length of 32
+    *  @return      uint256
+    */
+    function bytesToUint256(bytes memory _bs) internal pure returns (uint256 value) {
+        require(_bs.length == 32, "bytes length is not 32.");
+        assembly {
+            // load 32 bytes from memory starting from position _bs + 32
+            value := mload(add(_bs, 0x20))
+        }
+        require(value <= 0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff, "Value exceeds the range");
+    }
+
+    /* @notice      Convert uint256 to bytes
+    *  @param _b    uint256 that needs to be converted
+    *  @return      bytes
+    */
+    function uint256ToBytes(uint256 _value) internal pure returns (bytes memory bs) {
+        require(_value <= 0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff, "Value exceeds the range");
+        assembly {
+            // Get a location of some free memory and store it in result as
+            // Solidity does for memory variables.
+            bs := mload(0x40)
+            // Put 0x20 at the first word, the length of bytes for uint256 value
+            mstore(bs, 0x20)
+            //In the next word, put value in bytes format to the next 32 bytes
+            mstore(add(bs, 0x20), _value)
+            // Update the free-memory pointer by padding our last write location to 32 bytes
+            mstore(0x40, add(bs, 0x40))
+        }
+    }
+
+    /* @notice      Convert bytes to address
+    *  @param _bs   Source bytes: bytes length must be 20
+    *  @return      Converted address from source bytes
+    */
+    function bytesToAddress(bytes memory _bs) internal pure returns (address addr)
+    {
+        require(_bs.length == 20, "bytes length does not match address");
+        assembly {
+            // for _bs, first word store _bs.length, second word store _bs.value
+            // load 32 bytes from mem[_bs+20], convert it into Uint160, meaning we take last 20 bytes as addr (address).
+            addr := mload(add(_bs, 0x14))
+        }
+
+    }
+
+    /* @notice      Convert address to bytes
+    *  @param _addr Address need to be converted
+    *  @return      Converted bytes from address
+    */
+    function addressToBytes(address _addr) internal pure returns (bytes memory bs){
+        assembly {
+            // Get a location of some free memory and store it in result as
+            // Solidity does for memory variables.
+            bs := mload(0x40)
+            // Put 20 (address byte length) at the first word, the length of bytes for uint256 value
+            mstore(bs, 0x14)
+            // logical shift left _a by 12 bytes, change _a from right-aligned to left-aligned
+            mstore(add(bs, 0x20), shl(96, _addr))
+            // Update the free-memory pointer by padding our last write location to 32 bytes
+            mstore(0x40, add(bs, 0x40))
+       }
+    }
+
+    /* @notice          Do hash leaf as the multi-chain does
+    *  @param _data     Data in bytes format
+    *  @return          Hashed value in bytes32 format
+    */
+    function hashLeaf(bytes memory _data) internal pure returns (bytes32 result)  {
+        result = sha256(abi.encodePacked(bytes1(0x0), _data));
+    }
+
+    /* @notice          Do hash children as the multi-chain does
+    *  @param _l        Left node
+    *  @param _r        Right node
+    *  @return          Hashed value in bytes32 format
+    */
+    function hashChildren(bytes32 _l, bytes32  _r) internal pure returns (bytes32 result)  {
+        result = sha256(abi.encodePacked(bytes1(0x01), _l, _r));
+    }
+
+    /* @notice              Compare if two bytes are equal, which are in storage and memory, seperately
+                            Refer from https://github.com/summa-tx/bitcoin-spv/blob/master/solidity/contracts/BytesLib.sol#L368
+    *  @param _preBytes     The bytes stored in storage
+    *  @param _postBytes    The bytes stored in memory
+    *  @return              Bool type indicating if they are equal
+    */
+    function equalStorage(bytes storage _preBytes, bytes memory _postBytes) internal view returns (bool) {
+        bool success = true;
+
+        assembly {
+            // we know _preBytes_offset is 0
+            let fslot := sload(_preBytes.slot)
+            // Arrays of 31 bytes or less have an even value in their slot,
+            // while longer arrays have an odd value. The actual length is
+            // the slot divided by two for odd values, and the lowest order
+            // byte divided by two for even values.
+            // If the slot is even, bitwise and the slot with 255 and divide by
+            // two to get the length. If the slot is odd, bitwise and the slot
+            // with -1 and divide by two.
+            let slength := div(and(fslot, sub(mul(0x100, iszero(and(fslot, 1))), 1)), 2)
+            let mlength := mload(_postBytes)
+
+            // if lengths don't match the arrays are not equal
+            switch eq(slength, mlength)
+            case 1 {
+                // fslot can contain both the length and contents of the array
+                // if slength < 32 bytes so let's prepare for that
+                // v. http://solidity.readthedocs.io/en/latest/miscellaneous.html#layout-of-state-variables-in-storage
+                // slength != 0
+                if iszero(iszero(slength)) {
+                    switch lt(slength, 32)
+                    case 1 {
+                        // blank the last byte which is the length
+                        fslot := mul(div(fslot, 0x100), 0x100)
+
+                        if iszero(eq(fslot, mload(add(_postBytes, 0x20)))) {
+                            // unsuccess:
+                            success := 0
+                        }
+                    }
+                    default {
+                        // cb is a circuit breaker in the for loop since there's
+                        //  no said feature for inline assembly loops
+                        // cb = 1 - don't breaker
+                        // cb = 0 - break
+                        let cb := 1
+
+                        // get the keccak hash to get the contents of the array
+                        mstore(0x0, _preBytes.slot)
+                        let sc := keccak256(0x0, 0x20)
+
+                        let mc := add(_postBytes, 0x20)
+                        let end := add(mc, mlength)
+
+                        // the next line is the loop condition:
+                        // while(uint(mc < end) + cb == 2)
+                        for {} eq(add(lt(mc, end), cb), 2) {
+                            sc := add(sc, 1)
+                            mc := add(mc, 0x20)
+                        } {
+                            if iszero(eq(sload(sc), mload(mc))) {
+                                // unsuccess:
+                                success := 0
+                                cb := 0
+                            }
+                        }
+                    }
+                }
+            }
+            default {
+                // unsuccess:
+                success := 0
+            }
+        }
+
+        return success;
+    }
+
+    /* @notice              Slice the _bytes from _start index till the result has length of _length
+                            Refer from https://github.com/summa-tx/bitcoin-spv/blob/master/solidity/contracts/BytesLib.sol#L246
+    *  @param _bytes        The original bytes needs to be sliced
+    *  @param _start        The index of _bytes for the start of sliced bytes
+    *  @param _length       The index of _bytes for the end of sliced bytes
+    *  @return              The sliced bytes
+    */
+    function slice(
+        bytes memory _bytes,
+        uint _start,
+        uint _length
+    )
+        internal
+        pure
+        returns (bytes memory)
+    {
+        require(_bytes.length >= (_start + _length));
+
+        bytes memory tempBytes;
+
+        assembly {
+            switch iszero(_length)
+            case 0 {
+                // Get a location of some free memory and store it in tempBytes as
+                // Solidity does for memory variables.
+                tempBytes := mload(0x40)
+
+                // The first word of the slice result is potentially a partial
+                // word read from the original array. To read it, we calculate
+                // the length of that partial word and start copying that many
+                // bytes into the array. The first word we copy will start with
+                // data we don't care about, but the last `lengthmod` bytes will
+                // land at the beginning of the contents of the new array. When
+                // we're done copying, we overwrite the full first word with
+                // the actual length of the slice.
+                // lengthmod <= _length % 32
+                let lengthmod := and(_length, 31)
+
+                // The multiplication in the next line is necessary
+                // because when slicing multiples of 32 bytes (lengthmod == 0)
+                // the following copy loop was copying the origin's length
+                // and then ending prematurely not copying everything it should.
+                let mc := add(add(tempBytes, lengthmod), mul(0x20, iszero(lengthmod)))
+                let end := add(mc, _length)
+
+                for {
+                    // The multiplication in the next line has the same exact purpose
+                    // as the one above.
+                    let cc := add(add(add(_bytes, lengthmod), mul(0x20, iszero(lengthmod))), _start)
+                } lt(mc, end) {
+                    mc := add(mc, 0x20)
+                    cc := add(cc, 0x20)
+                } {
+                    mstore(mc, mload(cc))
+                }
+
+                mstore(tempBytes, _length)
+
+                //update free-memory pointer
+                //allocating the array padded to 32 bytes like the compiler does now
+                mstore(0x40, and(add(mc, 31), not(31)))
+            }
+            //if we want a zero-length slice let's just return a zero-length array
+            default {
+                tempBytes := mload(0x40)
+
+                mstore(0x40, add(tempBytes, 0x20))
+            }
+        }
+
+        return tempBytes;
+    }
+    /* @notice              Check if the elements number of _signers within _keepers array is no less than _m
+    *  @param _keepers      The array consists of serveral address
+    *  @param _signers      Some specific addresses to be looked into
+    *  @param _m            The number requirement paramter
+    *  @return              True means containment, false meansdo do not contain.
+    */
+    function containMAddresses(address[] memory _keepers, address[] memory _signers, uint _m) internal pure returns (bool){
+        uint m = 0;
+        for(uint i = 0; i < _signers.length; i++){
+            for (uint j = 0; j < _keepers.length; j++) {
+                if (_signers[i] == _keepers[j]) {
+                    m++;
+                    delete _keepers[j];
+                }
+            }
+        }
+        return m >= _m;
+    }
+
+    /* @notice              TODO
+    *  @param key
+    *  @return
+    */
+    function compressMCPubKey(bytes memory key) internal pure returns (bytes memory newkey) {
+         require(key.length >= 67, "key lenggh is too short");
+         newkey = slice(key, 0, 35);
+         if (uint8(key[66]) % 2 == 0){
+             newkey[2] = bytes1(0x02);
+         } else {
+             newkey[2] = bytes1(0x03);
+         }
+         return newkey;
+    }
+
+    /**
+     * @dev Returns true if `account` is a contract.
+     *      Refer from https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/Address.sol#L18
+     *
+     * This test is non-exhaustive, and there may be false-negatives: during the
+     * execution of a contract's constructor, its address will be reported as
+     * not containing a contract.
+     *
+     * IMPORTANT: It is unsafe to assume that an address for which this
+     * function returns false is an externally-owned account (EOA) and not a
+     * contract.
+     */
+    function isContract(address account) internal view returns (bool) {
+        // This method relies in extcodesize, which returns 0 for contracts in
+        // construction, since the code is only stored at the end of the
+        // constructor execution.
+
+        // According to EIP-1052, 0x0 is the value returned for not-yet created accounts
+        // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
+        // for accounts without code, i.e. `keccak256('')`
+        bytes32 codehash;
+        bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
+        // solhint-disable-next-line no-inline-assembly
+        assembly { codehash := extcodehash(account) }
+        return (codehash != 0x0 && codehash != accountHash);
+    }
+}
+
+// File: contracts/libs/math/SafeMath.sol
+
+
+
+/**
+ * @dev Wrappers over Solidity's arithmetic operations with added overflow
+ * checks.
+ *
+ * Arithmetic operations in Solidity wrap on overflow. This can easily result
+ * in bugs, because programmers usually assume that an overflow raises an
+ * error, which is the standard behavior in high level programming languages.
+ * `SafeMath` restores this intuition by reverting the transaction when an
+ * operation overflows.
+ *
+ * Using this library instead of the unchecked operations eliminates an entire
+ * class of bugs, so it's recommended to use it always.
+ */
+library SafeMath {
+    /**
+     * @dev Returns the addition of two unsigned integers, reverting on
+     * overflow.
+     *
+     * Counterpart to Solidity's `+` operator.
+     *
+     * Requirements:
+     * - Addition cannot overflow.
+     */
+    function add(uint256 a, uint256 b) internal pure returns (uint256) {
+        uint256 c = a + b;
+        require(c >= a, "SafeMath: addition overflow");
+
+        return c;
+    }
+
+    /**
+     * @dev Returns the subtraction of two unsigned integers, reverting on
+     * overflow (when the result is negative).
+     *
+     * Counterpart to Solidity's `-` operator.
+     *
+     * Requirements:
+     * - Subtraction cannot overflow.
+     */
+    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
+        return sub(a, b, "SafeMath: subtraction overflow");
+    }
+
+    /**
+     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
+     * overflow (when the result is negative).
+     *
+     * Counterpart to Solidity's `-` operator.
+     *
+     * Requirements:
+     * - Subtraction cannot overflow.
+     */
+    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
+        require(b <= a, errorMessage);
+        uint256 c = a - b;
+
+        return c;
+    }
+
+    /**
+     * @dev Returns the multiplication of two unsigned integers, reverting on
+     * overflow.
+     *
+     * Counterpart to Solidity's `*` operator.
+     *
+     * Requirements:
+     * - Multiplication cannot overflow.
+     */
+    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
+        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
+        // benefit is lost if 'b' is also tested.
+        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
+        if (a == 0) {
+            return 0;
+        }
+
+        uint256 c = a * b;
+        require(c / a == b, "SafeMath: multiplication overflow");
+
+        return c;
+    }
+
+    /**
+     * @dev Returns the integer division of two unsigned integers. Reverts on
+     * division by zero. The result is rounded towards zero.
+     *
+     * Counterpart to Solidity's `/` operator. Note: this function uses a
+     * `revert` opcode (which leaves remaining gas untouched) while Solidity
+     * uses an invalid opcode to revert (consuming all remaining gas).
+     *
+     * Requirements:
+     * - The divisor cannot be zero.
+     */
+    function div(uint256 a, uint256 b) internal pure returns (uint256) {
+        return div(a, b, "SafeMath: division by zero");
+    }
+
+    /**
+     * @dev Returns the integer division of two unsigned integers. Reverts with custom message on
+     * division by zero. The result is rounded towards zero.
+     *
+     * Counterpart to Solidity's `/` operator. Note: this function uses a
+     * `revert` opcode (which leaves remaining gas untouched) while Solidity
+     * uses an invalid opcode to revert (consuming all remaining gas).
+     *
+     * Requirements:
+     * - The divisor cannot be zero.
+     */
+    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
+        // Solidity only automatically asserts when dividing by 0
+        require(b > 0, errorMessage);
+        uint256 c = a / b;
+        // assert(a == b * c + a % b); // There is no case in which this doesn't hold
+
+        return c;
+    }
+
+    /**
+     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
+     * Reverts when dividing by zero.
+     *
+     * Counterpart to Solidity's `%` operator. This function uses a `revert`
+     * opcode (which leaves remaining gas untouched) while Solidity uses an
+     * invalid opcode to revert (consuming all remaining gas).
+     *
+     * Requirements:
+     * - The divisor cannot be zero.
+     */
+    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
+        return mod(a, b, "SafeMath: modulo by zero");
+    }
+
+    /**
+     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
+     * Reverts with custom message when dividing by zero.
+     *
+     * Counterpart to Solidity's `%` operator. This function uses a `revert`
+     * opcode (which leaves remaining gas untouched) while Solidity uses an
+     * invalid opcode to revert (consuming all remaining gas).
+     *
+     * Requirements:
+     * - The divisor cannot be zero.
+     */
+    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
+        require(b != 0, errorMessage);
+        return a % b;
+    }
+}
+
+// File: contracts/Wallet.sol
+
+
+
+interface ERC20 {
+    function approve(address spender, uint256 amount) external returns (bool);
+    function transfer(address recipient, uint256 amount) external returns (bool);
+    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
+    function balanceOf(address account) external view returns (uint256);
+}
+
+/// @title The Wallet contract for Switcheo TradeHub
+/// @author Switcheo Network
+/// @notice This contract faciliates deposits for Switcheo TradeHub.
+/// @dev This contract is used together with the LockProxy contract to allow users
+/// to deposit funds without requiring them to have ETH
+contract Wallet {
+    bool public isInitialized;
+    address public creator;
+    address public owner;
+    bytes public swthAddress;
+
+    function initialize(address _owner, bytes calldata _swthAddress) external {
+        require(isInitialized == false, "Contract already initialized");
+        isInitialized = true;
+        creator = msg.sender;
+        owner = _owner;
+        swthAddress = _swthAddress;
+    }
+
+    /// @dev Allow this contract to receive Ethereum
+    receive() external payable {}
+
+    /// @dev Allow this contract to receive ERC223 tokens
+    // An empty implementation is required so that the ERC223 token will not
+    // throw an error on transfer
+    function tokenFallback(address, uint, bytes calldata) external {}
+
+    /// @dev send ETH from this contract to its creator
+    function sendETHToCreator(uint256 _amount) external {
+        require(msg.sender == creator, "Sender must be creator");
+        // we use `call` here following the recommendation from
+        // https://diligence.consensys.net/blog/2019/09/stop-using-soliditys-transfer-now/
+        (bool success,  ) = creator.call{value: _amount}("");
+        require(success, "Transfer failed");
+    }
+
+    /// @dev send tokens from this contract to its creator
+    function sendERC20ToCreator(address _assetId, uint256 _amount) external {
+        require(msg.sender == creator, "Sender must be creator");
+
+        ERC20 token = ERC20(_assetId);
+        _callOptionalReturn(
+            token,
+            abi.encodeWithSelector(
+                token.transfer.selector,
+                creator,
+                _amount
+            )
+        );
+    }
+
+    /**
+     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
+     * on the return value: the return value is optional (but if data is returned, it must not be false).
+     * @param token The token targeted by the call.
+     * @param data The call data (encoded using abi.encode or one of its variants).
+     */
+    function _callOptionalReturn(ERC20 token, bytes memory data) private {
+        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
+        // we're implementing it ourselves.
+
+        // A Solidity high level call has three parts:
+        //  1. The target address is checked to verify it contains contract code
+        //  2. The call itself is made, and success asserted
+        //  3. The return value is decoded, which in turn checks the size of the returned data.
+        // solhint-disable-next-line max-line-length
+        require(_isContract(address(token)), "SafeERC20: call to non-contract");
+
+        // solhint-disable-next-line avoid-low-level-calls
+        (bool success, bytes memory returndata) = address(token).call(data);
+        require(success, "SafeERC20: low-level call failed");
+
+        if (returndata.length > 0) { // Return data is optional
+            // solhint-disable-next-line max-line-length
+            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
+        }
+    }
+
+    /**
+     * @dev Returns true if `account` is a contract.
+     *
+     * [IMPORTANT]
+     * ====
+     * It is unsafe to assume that an address for which this function returns
+     * false is an externally-owned account (EOA) and not a contract.
+     *
+     * Among others, `_isContract` will return false for the following
+     * types of addresses:
+     *
+     *  - an externally-owned account
+     *  - a contract in construction
+     *  - an address where a contract will be created
+     *  - an address where a contract lived, but was destroyed
+     * ====
+     */
+    function _isContract(address account) private view returns (bool) {
+        // According to EIP-1052, 0x0 is the value returned for not-yet created accounts
+        // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
+        // for accounts without code, i.e. `keccak256('')`
+        bytes32 codehash;
+        bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
+        // solhint-disable-next-line no-inline-assembly
+        assembly { codehash := extcodehash(account) }
+        return (codehash != accountHash && codehash != 0x0);
+    }
+}
+
+// File: contracts/LockProxy.sol
+
+
+interface CCM {
+    function crossChain(uint64 _toChainId, bytes calldata _toContract, bytes calldata _method, bytes calldata _txData) external returns (bool);
+}
+
+interface CCMProxy {
+    function getEthCrossChainManager() external view returns (address);
+}
+
+/// @title The LockProxy contract for Switcheo TradeHub
+/// @author Switcheo Network
+/// @notice This contract faciliates deposits and withdrawals to Switcheo TradeHub.
+/// @dev The contract also allows for additional features in the future through "extension" contracts.
+contract LockProxy is ReentrancyGuard {
+    using SafeMath for uint256;
+
+    // used for cross-chain addExtension and removeExtension methods
+    struct ExtensionTxArgs {
+        bytes extensionAddress;
+    }
+
+    // used for cross-chain registerAsset method
+    struct RegisterAssetTxArgs {
+        bytes assetHash;
+        bytes nativeAssetHash;
+    }
+
+    // used for cross-chain lock and unlock methods
+    struct TransferTxArgs {
+        bytes fromAssetHash;
+        bytes toAssetHash;
+        bytes toAddress;
+        uint256 amount;
+        uint256 feeAmount;
+        bytes feeAddress;
+        bytes fromAddress;
+        uint256 nonce;
+    }
+
+    // used to create a unique salt for wallet creation
+    bytes public constant SALT_PREFIX = "switcheo-eth-wallet-factory-v1";
+    address public constant ETH_ASSET_HASH = address(0);
+
+    CCMProxy public ccmProxy;
+    uint64 public counterpartChainId;
+    uint256 public currentNonce = 0;
+
+    // a mapping of assetHashes to the hash of
+    // (associated proxy address on Switcheo TradeHub, associated asset hash on Switcheo TradeHub)
+    mapping(address => bytes32) public registry;
+
+    // a record of signed messages to prevent replay attacks
+    mapping(bytes32 => bool) public seenMessages;
+
+    // a mapping of extension contracts
+    mapping(address => bool) public extensions;
+
+    // a record of created wallets
+    mapping(address => bool) public wallets;
+
+    event LockEvent(
+        address fromAssetHash,
+        address fromAddress,
+        uint64 toChainId,
+        bytes toAssetHash,
+        bytes toAddress,
+        bytes txArgs
+    );
+
+    event UnlockEvent(
+        address toAssetHash,
+        address toAddress,
+        uint256 amount,
+        bytes txArgs
+    );
+
+    constructor(address _ccmProxyAddress, uint64 _counterpartChainId) {
+        require(_counterpartChainId > 0, "counterpartChainId cannot be zero");
+        require(_ccmProxyAddress != address(0), "ccmProxyAddress cannot be empty");
+        counterpartChainId = _counterpartChainId;
+        ccmProxy = CCMProxy(_ccmProxyAddress);
+    }
+
+    modifier onlyManagerContract() {
+        require(
+            msg.sender == ccmProxy.getEthCrossChainManager(),
+            "msg.sender is not CCM"
+        );
+        _;
+    }
+
+    /// @dev Allow this contract to receive Ethereum
+    receive() external payable {}
+
+    /// @dev Allow this contract to receive ERC223 tokens
+    /// An empty implementation is required so that the ERC223 token will not
+    /// throw an error on transfer, this is specific to ERC223 tokens which
+    /// require this implementation, e.g. DGTX
+    function tokenFallback(address, uint, bytes calldata) external {}
+
+    /// @dev Calculate the wallet address for the given owner and Switcheo TradeHub address
+    /// @param _ownerAddress the Ethereum address which the user has control over, i.e. can sign msgs with
+    /// @param _swthAddress the hex value of the user's Switcheo TradeHub address
+    /// @param _bytecodeHash the hash of the wallet contract's bytecode
+    /// @return the wallet address
+    function getWalletAddress(
+        address _ownerAddress,
+        bytes calldata _swthAddress,
+        bytes32 _bytecodeHash
+    )
+        external
+        view
+        returns (address)
+    {
+        bytes32 salt = _getSalt(
+            _ownerAddress,
+            _swthAddress
+        );
+
+        bytes32 data = keccak256(
+            abi.encodePacked(bytes1(0xff), address(this), salt, _bytecodeHash)
+        );
+
+        return address(bytes20(data << 96));
+    }
+
+    /// @dev Create the wallet for the given owner and Switcheo TradeHub address
+    /// @param _ownerAddress the Ethereum address which the user has control over, i.e. can sign msgs with
+    /// @param _swthAddress the hex value of the user's Switcheo TradeHub address
+    /// @return true if success
+    function createWallet(
+        address _ownerAddress,
+        bytes calldata _swthAddress
+    )
+        external
+        nonReentrant
+        returns (bool)
+    {
+        require(_ownerAddress != address(0), "Empty ownerAddress");
+        require(_swthAddress.length != 0, "Empty swthAddress");
+
+        bytes32 salt = _getSalt(
+            _ownerAddress,
+            _swthAddress
+        );
+
+        Wallet wallet = new Wallet{salt: salt}();
+        wallet.initialize(_ownerAddress, _swthAddress);
+        wallets[address(wallet)] = true;
+
+        return true;
+    }
+
+    /// @dev Add a contract as an extension
+    /// @param _argsBz the serialized ExtensionTxArgs
+    /// @param _fromChainId the originating chainId
+    /// @return true if success
+    function addExtension(
+        bytes calldata _argsBz,
+        bytes calldata /* _fromContractAddr */,
+        uint64 _fromChainId
+    )
+        external
+        onlyManagerContract
+        nonReentrant
+        returns (bool)
+    {
+        require(_fromChainId == counterpartChainId, "Invalid chain ID");
+
+        ExtensionTxArgs memory args = _deserializeExtensionTxArgs(_argsBz);
+        address extensionAddress = Utils.bytesToAddress(args.extensionAddress);
+        extensions[extensionAddress] = true;
+
+        return true;
+    }
+
+    /// @dev Remove a contract from the extensions mapping
+    /// @param _argsBz the serialized ExtensionTxArgs
+    /// @param _fromChainId the originating chainId
+    /// @return true if success
+    function removeExtension(
+        bytes calldata _argsBz,
+        bytes calldata /* _fromContractAddr */,
+        uint64 _fromChainId
+    )
+        external
+        onlyManagerContract
+        nonReentrant
+        returns (bool)
+    {
+        require(_fromChainId == counterpartChainId, "Invalid chain ID");
+
+        ExtensionTxArgs memory args = _deserializeExtensionTxArgs(_argsBz);
+        address extensionAddress = Utils.bytesToAddress(args.extensionAddress);
+        extensions[extensionAddress] = false;
+
+        return true;
+    }
+
+    /// @dev Marks an asset as registered by mapping the asset's address to
+    /// the specified _fromContractAddr and assetHash on Switcheo TradeHub
+    /// @param _argsBz the serialized RegisterAssetTxArgs
+    /// @param _fromContractAddr the associated contract address on Switcheo TradeHub
+    /// @param _fromChainId the originating chainId
+    /// @return true if success
+    function registerAsset(
+        bytes calldata _argsBz,
+        bytes calldata _fromContractAddr,
+        uint64 _fromChainId
+    )
+        external
+        onlyManagerContract
+        nonReentrant
+        returns (bool)
+    {
+        require(_fromChainId == counterpartChainId, "Invalid chain ID");
+
+        RegisterAssetTxArgs memory args = _deserializeRegisterAssetTxArgs(_argsBz);
+        _markAssetAsRegistered(
+            Utils.bytesToAddress(args.nativeAssetHash),
+            _fromContractAddr,
+            args.assetHash
+        );
+
+        return true;
+    }
+
+    /// @dev Performs a deposit from a Wallet contract
+    /// @param _walletAddress address of the wallet contract, the wallet contract
+    /// does not receive ETH in this call, but _walletAddress still needs to be payable
+    /// since the wallet contract can receive ETH, there would be compile errors otherwise
+    /// @param _assetHash the asset to deposit
+    /// @param _targetProxyHash the associated proxy hash on Switcheo TradeHub
+    /// @param _toAssetHash the associated asset hash on Switcheo TradeHub
+    /// @param _feeAddress the hex version of the Switcheo TradeHub address to send the fee to
+    /// @param _values[0]: amount, the number of tokens to deposit
+    /// @param _values[1]: feeAmount, the number of tokens to be used as fees
+    /// @param _values[2]: nonce, to prevent replay attacks
+    /// @param _values[3]: callAmount, some tokens may burn an amount before transfer
+    /// so we allow a callAmount to support these tokens
+    /// @param _v: the v value of the wallet owner's signature
+    /// @param _rs: the r, s values of the wallet owner's signature
+    function lockFromWallet(
+        address payable _walletAddress,
+        address _assetHash,
+        bytes calldata _targetProxyHash,
+        bytes calldata _toAssetHash,
+        bytes calldata _feeAddress,
+        uint256[] calldata _values,
+        uint8 _v,
+        bytes32[] calldata _rs
+    )
+        external
+        nonReentrant
+        returns (bool)
+    {
+        require(wallets[_walletAddress], "Invalid wallet address");
+
+        Wallet wallet = Wallet(_walletAddress);
+        _validateLockFromWallet(
+            wallet.owner(),
+            _assetHash,
+            _targetProxyHash,
+            _toAssetHash,
+            _feeAddress,
+            _values,
+            _v,
+            _rs
+        );
+
+        // it is very important that this function validates the success of a transfer correctly
+        // since, once this line is passed, the deposit is assumed to be successful
+        // which will eventually result in the specified amount of tokens being minted for the
+        // wallet.swthAddress on Switcheo TradeHub
+        _transferInFromWallet(_walletAddress, _assetHash, _values[0], _values[3]);
+
+        _lock(
+            _assetHash,
+            _targetProxyHash,
+            _toAssetHash,
+            wallet.swthAddress(),
+            _values[0],
+            _values[1],
+            _feeAddress
+        );
+
+        return true;
+    }
+
+    /// @dev Performs a deposit
+    /// @param _assetHash the asset to deposit
+    /// @param _targetProxyHash the associated proxy hash on Switcheo TradeHub
+    /// @param _toAddress the hex version of the Switcheo TradeHub address to deposit to
+    /// @param _toAssetHash the associated asset hash on Switcheo TradeHub
+    /// @param _feeAddress the hex version of the Switcheo TradeHub address to send the fee to
+    /// @param _values[0]: amount, the number of tokens to deposit
+    /// @param _values[1]: feeAmount, the number of tokens to be used as fees
+    /// @param _values[2]: callAmount, some tokens may burn an amount before transfer
+    /// so we allow a callAmount to support these tokens
+    function lock(
+        address _assetHash,
+        bytes calldata _targetProxyHash,
+        bytes calldata _toAddress,
+        bytes calldata _toAssetHash,
+        bytes calldata _feeAddress,
+        uint256[] calldata _values
+    )
+        external
+        payable
+        nonReentrant
+        returns (bool)
+    {
+
+        // it is very important that this function validates the success of a transfer correctly
+        // since, once this line is passed, the deposit is assumed to be successful
+        // which will eventually result in the specified amount of tokens being minted for the
+        // _toAddress on Switcheo TradeHub
+        _transferIn(_assetHash, _values[0], _values[2]);
+
+        _lock(
+            _assetHash,
+            _targetProxyHash,
+            _toAssetHash,
+            _toAddress,
+            _values[0],
+            _values[1],
+            _feeAddress
+        );
+
+        return true;
+    }
+
+    /// @dev Performs a withdrawal that was initiated on Switcheo TradeHub
+    /// @param _argsBz the serialized TransferTxArgs
+    /// @param _fromContractAddr the associated contract address on Switcheo TradeHub
+    /// @param _fromChainId the originating chainId
+    /// @return true if success
+    function unlock(
+        bytes calldata _argsBz,
+        bytes calldata _fromContractAddr,
+        uint64 _fromChainId
+    )
+        external
+        onlyManagerContract
+        nonReentrant
+        returns (bool)
+    {
+        require(_fromChainId == counterpartChainId, "Invalid chain ID");
+
+        TransferTxArgs memory args = _deserializeTransferTxArgs(_argsBz);
+        require(args.fromAssetHash.length > 0, "Invalid fromAssetHash");
+        require(args.toAssetHash.length == 20, "Invalid toAssetHash");
+
+        address toAssetHash = Utils.bytesToAddress(args.toAssetHash);
+        address toAddress = Utils.bytesToAddress(args.toAddress);
+
+        _validateAssetRegistration(toAssetHash, _fromContractAddr, args.fromAssetHash);
+        _transferOut(toAddress, toAssetHash, args.amount);
+
+        emit UnlockEvent(toAssetHash, toAddress, args.amount, _argsBz);
+        return true;
+    }
+
+    /// @dev Performs a transfer of funds, this is only callable by approved extension contracts
+    /// the `nonReentrant` guard is intentionally not added to this function, to allow for more flexibility.
+    /// The calling contract should be secure and have its own `nonReentrant` guard as needed.
+    /// @param _receivingAddress the address to transfer to
+    /// @param _assetHash the asset to transfer
+    /// @param _amount the amount to transfer
+    /// @return true if success
+    function extensionTransfer(
+        address _receivingAddress,
+        address _assetHash,
+        uint256 _amount
+    )
+        external
+        returns (bool)
+    {
+        require(
+            extensions[msg.sender] == true,
+            "Invalid extension"
+        );
+
+        if (_assetHash == ETH_ASSET_HASH) {
+            // we use `call` here since the _receivingAddress could be a contract
+            // see https://diligence.consensys.net/blog/2019/09/stop-using-soliditys-transfer-now/
+            // for more info
+            (bool success,  ) = _receivingAddress.call{value: _amount}("");
+            require(success, "Transfer failed");
+            return true;
+        }
+
+        ERC20 token = ERC20(_assetHash);
+        _callOptionalReturn(
+            token,
+            abi.encodeWithSelector(
+                token.approve.selector,
+                _receivingAddress,
+                _amount
+            )
+        );
+
+        return true;
+    }
+
+    /// @dev Marks an asset as registered by associating it to a specified Switcheo TradeHub proxy and asset hash
+    /// @param _assetHash the address of the asset to mark
+    /// @param _proxyAddress the associated proxy address on Switcheo TradeHub
+    /// @param _toAssetHash the associated asset hash on Switcheo TradeHub
+    function _markAssetAsRegistered(
+        address _assetHash,
+        bytes memory _proxyAddress,
+        bytes memory _toAssetHash
+    )
+        private
+    {
+        require(_proxyAddress.length == 20, "Invalid proxyAddress");
+        require(
+            registry[_assetHash] == bytes32(0),
+            "Asset already registered"
+        );
+
+        bytes32 value = keccak256(abi.encodePacked(
+            _proxyAddress,
+            _toAssetHash
+        ));
+
+        registry[_assetHash] = value;
+    }
+
+    /// @dev Validates that an asset's registration matches the given params
+    /// @param _assetHash the address of the asset to check
+    /// @param _proxyAddress the expected proxy address on Switcheo TradeHub
+    /// @param _toAssetHash the expected asset hash on Switcheo TradeHub
+    function _validateAssetRegistration(
+        address _assetHash,
+        bytes memory _proxyAddress,
+        bytes memory _toAssetHash
+    )
+        private
+        view
+    {
+        require(_proxyAddress.length == 20, "Invalid proxyAddress");
+        bytes32 value = keccak256(abi.encodePacked(
+            _proxyAddress,
+            _toAssetHash
+        ));
+        require(registry[_assetHash] == value, "Asset not registered");
+    }
+
+    /// @dev validates the asset registration and calls the CCM contract
+    function _lock(
+        address _fromAssetHash,
+        bytes memory _targetProxyHash,
+        bytes memory _toAssetHash,
+        bytes memory _toAddress,
+        uint256 _amount,
+        uint256 _feeAmount,
+        bytes memory _feeAddress
+    )
+        private
+    {
+        require(_targetProxyHash.length == 20, "Invalid targetProxyHash");
+        require(_toAssetHash.length > 0, "Empty toAssetHash");
+        require(_toAddress.length > 0, "Empty toAddress");
+        require(_amount > 0, "Amount must be more than zero");
+        require(_feeAmount < _amount, "Fee amount cannot be greater than amount");
+
+        _validateAssetRegistration(_fromAssetHash, _targetProxyHash, _toAssetHash);
+
+        TransferTxArgs memory txArgs = TransferTxArgs({
+            fromAssetHash: Utils.addressToBytes(_fromAssetHash),
+            toAssetHash: _toAssetHash,
+            toAddress: _toAddress,
+            amount: _amount,
+            feeAmount: _feeAmount,
+            feeAddress: _feeAddress,
+            fromAddress: abi.encodePacked(msg.sender),
+            nonce: _getNextNonce()
+        });
+
+        bytes memory txData = _serializeTransferTxArgs(txArgs);
+        CCM ccm = _getCcm();
+        require(
+            ccm.crossChain(counterpartChainId, _targetProxyHash, "unlock", txData),
+            "EthCrossChainManager crossChain executed error!"
+        );
+
+        emit LockEvent(_fromAssetHash, msg.sender, counterpartChainId, _toAssetHash, _toAddress, txData);
+    }
+
+    /// @dev validate the signature for lockFromWallet
+    function _validateLockFromWallet(
+        address _walletOwner,
+        address _assetHash,
+        bytes memory _targetProxyHash,
+        bytes memory _toAssetHash,
+        bytes memory _feeAddress,
+        uint256[] memory _values,
+        uint8 _v,
+        bytes32[] memory _rs
+    )
+        private
+    {
+        bytes32 message = keccak256(abi.encodePacked(
+            "sendTokens",
+            _assetHash,
+            _targetProxyHash,
+            _toAssetHash,
+            _feeAddress,
+            _values[0],
+            _values[1],
+            _values[2]
+        ));
+
+        require(seenMessages[message] == false, "Message already seen");
+        seenMessages[message] = true;
+        _validateSignature(message, _walletOwner, _v, _rs[0], _rs[1]);
+    }
+
+    /// @dev transfers funds from a Wallet contract into this contract
+    /// the difference between this contract's before and after balance must equal _amount
+    /// this is assumed to be sufficient in ensuring that the expected amount
+    /// of funds were transferred in
+    function _transferInFromWallet(
+        address payable _walletAddress,
+        address _assetHash,
+        uint256 _amount,
+        uint256 _callAmount
+    )
+        private
+    {
+        Wallet wallet = Wallet(_walletAddress);
+        if (_assetHash == ETH_ASSET_HASH) {
+            uint256 before = address(this).balance;
+
+            wallet.sendETHToCreator(_callAmount);
+
+            uint256 transferred = address(this).balance.sub(before);
+            require(transferred == _amount, "ETH transferred does not match the expected amount");
+            return;
+        }
+
+        ERC20 token = ERC20(_assetHash);
+        {
+          uint256 before = token.balanceOf(address(this));
+
+          wallet.sendERC20ToCreator(_assetHash, _callAmount);
+
+          uint256 transferred = token.balanceOf(address(this)).sub(before);
+          require(transferred == _amount, "Tokens transferred does not match the expected amount");
+        }
+    }
+
+    /// @dev transfers funds from an address into this contract
+    /// for ETH transfers, we only check that msg.value == _amount, and _callAmount is ignored
+    /// for token transfers, the difference between this contract's before and after balance must equal _amount
+    /// these checks are assumed to be sufficient in ensuring that the expected amount
+    /// of funds were transferred in
+    function _transferIn(
+        address _assetHash,
+        uint256 _amount,
+        uint256 _callAmount
+    )
+        private
+    {
+        if (_assetHash == ETH_ASSET_HASH) {
+            require(msg.value == _amount, "ETH transferred does not match the expected amount");
+            return;
+        }
+
+        ERC20 token = ERC20(_assetHash);
+        uint256 before = token.balanceOf(address(this));
+        _callOptionalReturn(
+            token,
+            abi.encodeWithSelector(
+                token.transferFrom.selector,
+                msg.sender,
+                address(this),
+                _callAmount
+            )
+        );
+        uint256 transferred = token.balanceOf(address(this)).sub(before);
+        require(transferred == _amount, "Tokens transferred does not match the expected amount");
+    }
+
+    /// @dev transfers funds from this contract to the _toAddress
+    function _transferOut(
+        address _toAddress,
+        address _assetHash,
+        uint256 _amount
+    )
+        private
+    {
+        if (_assetHash == ETH_ASSET_HASH) {
+            // we use `call` here since the _receivingAddress could be a contract
+            // see https://diligence.consensys.net/blog/2019/09/stop-using-soliditys-transfer-now/
+            // for more info
+            (bool success,  ) = _toAddress.call{value: _amount}("");
+            require(success, "Transfer failed");
+            return;
+        }
+
+        ERC20 token = ERC20(_assetHash);
+        _callOptionalReturn(
+            token,
+            abi.encodeWithSelector(
+                token.transfer.selector,
+                _toAddress,
+                _amount
+            )
+        );
+    }
+
+    /// @dev validates a signature against the specified user address
+    function _validateSignature(
+        bytes32 _message,
+        address _user,
+        uint8 _v,
+        bytes32 _r,
+        bytes32 _s
+    )
+        private
+        pure
+    {
+        bytes32 prefixedMessage = keccak256(abi.encodePacked(
+            "\x19Ethereum Signed Message:\n32",
+            _message
+        ));
+
+        require(
+            _user == ecrecover(prefixedMessage, _v, _r, _s),
+            "Invalid signature"
+        );
+    }
+
+    function _serializeTransferTxArgs(TransferTxArgs memory args) private pure returns (bytes memory) {
+        bytes memory buff;
+        buff = abi.encodePacked(
+            ZeroCopySink.WriteVarBytes(args.fromAssetHash),
+            ZeroCopySink.WriteVarBytes(args.toAssetHash),
+            ZeroCopySink.WriteVarBytes(args.toAddress),
+            ZeroCopySink.WriteUint255(args.amount),
+            ZeroCopySink.WriteUint255(args.feeAmount),
+            ZeroCopySink.WriteVarBytes(args.feeAddress),
+            ZeroCopySink.WriteVarBytes(args.fromAddress),
+            ZeroCopySink.WriteUint255(args.nonce)
+        );
+        return buff;
+    }
+
+    function _deserializeTransferTxArgs(bytes memory valueBz) private pure returns (TransferTxArgs memory) {
+        TransferTxArgs memory args;
+        uint256 off = 0;
+        (args.fromAssetHash, off) = ZeroCopySource.NextVarBytes(valueBz, off);
+        (args.toAssetHash, off) = ZeroCopySource.NextVarBytes(valueBz, off);
+        (args.toAddress, off) = ZeroCopySource.NextVarBytes(valueBz, off);
+        (args.amount, off) = ZeroCopySource.NextUint255(valueBz, off);
+        return args;
+    }
+
+    function _deserializeRegisterAssetTxArgs(bytes memory valueBz) private pure returns (RegisterAssetTxArgs memory) {
+        RegisterAssetTxArgs memory args;
+        uint256 off = 0;
+        (args.assetHash, off) = ZeroCopySource.NextVarBytes(valueBz, off);
+        (args.nativeAssetHash, off) = ZeroCopySource.NextVarBytes(valueBz, off);
+        return args;
+    }
+
+    function _deserializeExtensionTxArgs(bytes memory valueBz) private pure returns (ExtensionTxArgs memory) {
+        ExtensionTxArgs memory args;
+        uint256 off = 0;
+        (args.extensionAddress, off) = ZeroCopySource.NextVarBytes(valueBz, off);
+        return args;
+    }
+
+    function _getCcm() private view returns (CCM) {
+      CCM ccm = CCM(ccmProxy.getEthCrossChainManager());
+      return ccm;
+    }
+
+    function _getNextNonce() private returns (uint256) {
+      currentNonce = currentNonce.add(1);
+      return currentNonce;
+    }
+
+    function _getSalt(
+        address _ownerAddress,
+        bytes memory _swthAddress
+    )
+        private
+        pure
+        returns (bytes32)
+    {
+        return keccak256(abi.encodePacked(
+            SALT_PREFIX,
+            _ownerAddress,
+            _swthAddress
+        ));
+    }
+
+
+    /**
+     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
+     * on the return value: the return value is optional (but if data is returned, it must not be false).
+     * @param token The token targeted by the call.
+     * @param data The call data (encoded using abi.encode or one of its variants).
+     */
+    function _callOptionalReturn(ERC20 token, bytes memory data) private {
+        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
+        // we're implementing it ourselves.
+
+        // A Solidity high level call has three parts:
+        //  1. The target address is checked to verify it contains contract code
+        //  2. The call itself is made, and success asserted
+        //  3. The return value is decoded, which in turn checks the size of the returned data.
+        // solhint-disable-next-line max-line-length
+        require(_isContract(address(token)), "SafeERC20: call to non-contract");
+
+        // solhint-disable-next-line avoid-low-level-calls
+        (bool success, bytes memory returndata) = address(token).call(data);
+        require(success, "SafeERC20: low-level call failed");
+
+        if (returndata.length > 0) { // Return data is optional
+            // solhint-disable-next-line max-line-length
+            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
+        }
+    }
+
+    /**
+     * @dev Returns true if `account` is a contract.
+     *
+     * [IMPORTANT]
+     * ====
+     * It is unsafe to assume that an address for which this function returns
+     * false is an externally-owned account (EOA) and not a contract.
+     *
+     * Among others, `_isContract` will return false for the following
+     * types of addresses:
+     *
+     *  - an externally-owned account
+     *  - a contract in construction
+     *  - an address where a contract will be created
+     *  - an address where a contract lived, but was destroyed
+     * ====
+     */
+    function _isContract(address account) private view returns (bool) {
+        // According to EIP-1052, 0x0 is the value returned for not-yet created accounts
+        // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
+        // for accounts without code, i.e. `keccak256('')`
+        bytes32 codehash;
+        bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
+        // solhint-disable-next-line no-inline-assembly
+        assembly { codehash := extcodehash(account) }
+        return (codehash != accountHash && codehash != 0x0);
+    }
+}
diff --git a/smart-contracts/test/zilbridge/tokens/switcheo/libs/LICENSE b/smart-contracts/test/zilbridge/tokens/switcheo/libs/LICENSE
new file mode 100644
index 0000000..98dd89c
--- /dev/null
+++ b/smart-contracts/test/zilbridge/tokens/switcheo/libs/LICENSE
@@ -0,0 +1,22 @@
+The MIT License (MIT)
+
+Copyright (c) 2016 Smart Contract Solutions, Inc.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be included
+in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/smart-contracts/test/zilbridge/tokens/switcheo/libs/README.md b/smart-contracts/test/zilbridge/tokens/switcheo/libs/README.md
new file mode 100644
index 0000000..8827bd1
--- /dev/null
+++ b/smart-contracts/test/zilbridge/tokens/switcheo/libs/README.md
@@ -0,0 +1,3 @@
+# Lib Contracts
+
+The contracts in this folder were copied from the OpenZeppelin repository at https://github.com/OpenZeppelin/openzeppelin-contracts for ease of reference.
diff --git a/smart-contracts/test/zilbridge/tokens/switcheo/libs/math/SafeMath.sol b/smart-contracts/test/zilbridge/tokens/switcheo/libs/math/SafeMath.sol
new file mode 100644
index 0000000..92592c1
--- /dev/null
+++ b/smart-contracts/test/zilbridge/tokens/switcheo/libs/math/SafeMath.sol
@@ -0,0 +1,152 @@
+// SPDX-License-Identifier: MIT
+
+pragma solidity 0.8.20;
+
+/**
+ * @dev Wrappers over Solidity's arithmetic operations with added overflow
+ * checks.
+ *
+ * Arithmetic operations in Solidity wrap on overflow. This can easily result
+ * in bugs, because programmers usually assume that an overflow raises an
+ * error, which is the standard behavior in high level programming languages.
+ * `SafeMath` restores this intuition by reverting the transaction when an
+ * operation overflows.
+ *
+ * Using this library instead of the unchecked operations eliminates an entire
+ * class of bugs, so it's recommended to use it always.
+ */
+library SafeMath {
+    /**
+     * @dev Returns the addition of two unsigned integers, reverting on
+     * overflow.
+     *
+     * Counterpart to Solidity's `+` operator.
+     *
+     * Requirements:
+     * - Addition cannot overflow.
+     */
+    function add(uint256 a, uint256 b) internal pure returns (uint256) {
+        uint256 c = a + b;
+        require(c >= a, "SafeMath: addition overflow");
+
+        return c;
+    }
+
+    /**
+     * @dev Returns the subtraction of two unsigned integers, reverting on
+     * overflow (when the result is negative).
+     *
+     * Counterpart to Solidity's `-` operator.
+     *
+     * Requirements:
+     * - Subtraction cannot overflow.
+     */
+    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
+        return sub(a, b, "SafeMath: subtraction overflow");
+    }
+
+    /**
+     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
+     * overflow (when the result is negative).
+     *
+     * Counterpart to Solidity's `-` operator.
+     *
+     * Requirements:
+     * - Subtraction cannot overflow.
+     */
+    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
+        require(b <= a, errorMessage);
+        uint256 c = a - b;
+
+        return c;
+    }
+
+    /**
+     * @dev Returns the multiplication of two unsigned integers, reverting on
+     * overflow.
+     *
+     * Counterpart to Solidity's `*` operator.
+     *
+     * Requirements:
+     * - Multiplication cannot overflow.
+     */
+    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
+        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
+        // benefit is lost if 'b' is also tested.
+        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
+        if (a == 0) {
+            return 0;
+        }
+
+        uint256 c = a * b;
+        require(c / a == b, "SafeMath: multiplication overflow");
+
+        return c;
+    }
+
+    /**
+     * @dev Returns the integer division of two unsigned integers. Reverts on
+     * division by zero. The result is rounded towards zero.
+     *
+     * Counterpart to Solidity's `/` operator. Note: this function uses a
+     * `revert` opcode (which leaves remaining gas untouched) while Solidity
+     * uses an invalid opcode to revert (consuming all remaining gas).
+     *
+     * Requirements:
+     * - The divisor cannot be zero.
+     */
+    function div(uint256 a, uint256 b) internal pure returns (uint256) {
+        return div(a, b, "SafeMath: division by zero");
+    }
+
+    /**
+     * @dev Returns the integer division of two unsigned integers. Reverts with custom message on
+     * division by zero. The result is rounded towards zero.
+     *
+     * Counterpart to Solidity's `/` operator. Note: this function uses a
+     * `revert` opcode (which leaves remaining gas untouched) while Solidity
+     * uses an invalid opcode to revert (consuming all remaining gas).
+     *
+     * Requirements:
+     * - The divisor cannot be zero.
+     */
+    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
+        // Solidity only automatically asserts when dividing by 0
+        require(b > 0, errorMessage);
+        uint256 c = a / b;
+        // assert(a == b * c + a % b); // There is no case in which this doesn't hold
+
+        return c;
+    }
+
+    /**
+     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
+     * Reverts when dividing by zero.
+     *
+     * Counterpart to Solidity's `%` operator. This function uses a `revert`
+     * opcode (which leaves remaining gas untouched) while Solidity uses an
+     * invalid opcode to revert (consuming all remaining gas).
+     *
+     * Requirements:
+     * - The divisor cannot be zero.
+     */
+    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
+        return mod(a, b, "SafeMath: modulo by zero");
+    }
+
+    /**
+     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
+     * Reverts with custom message when dividing by zero.
+     *
+     * Counterpart to Solidity's `%` operator. This function uses a `revert`
+     * opcode (which leaves remaining gas untouched) while Solidity uses an
+     * invalid opcode to revert (consuming all remaining gas).
+     *
+     * Requirements:
+     * - The divisor cannot be zero.
+     */
+    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
+        require(b != 0, errorMessage);
+        return a % b;
+    }
+}
diff --git a/smart-contracts/test/zilbridge/tokens/switcheo/libs/token/ERC20/ERC20.sol b/smart-contracts/test/zilbridge/tokens/switcheo/libs/token/ERC20/ERC20.sol
new file mode 100644
index 0000000..7b41cd0
--- /dev/null
+++ b/smart-contracts/test/zilbridge/tokens/switcheo/libs/token/ERC20/ERC20.sol
@@ -0,0 +1,230 @@
+// SPDX-License-Identifier: MIT
+
+pragma solidity 0.8.20;
+
+import "./IERC20.sol";
+import "../../math/SafeMath.sol";
+
+/**
+ * @dev Implementation of the `IERC20` interface.
+ *
+ * This implementation is agnostic to the way tokens are created. This means
+ * that a supply mechanism has to be added in a derived contract using `_mint`.
+ * For a generic mechanism see `ERC20Mintable`.
+ *
+ * *For a detailed writeup see our guide [How to implement supply
+ * mechanisms](https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226).*
+ *
+ * We have followed general OpenZeppelin guidelines: functions revert instead
+ * of returning `false` on failure. This behavior is nonetheless conventional
+ * and does not conflict with the expectations of ERC20 applications.
+ *
+ * Additionally, an `Approval` event is emitted on calls to `transferFrom`.
+ * This allows applications to reconstruct the allowance for all accounts just
+ * by listening to said events. Other implementations of the EIP may not emit
+ * these events, as it isn't required by the specification.
+ *
+ * Finally, the non-standard `decreaseAllowance` and `increaseAllowance`
+ * functions have been added to mitigate the well-known issues around setting
+ * allowances. See `IERC20.approve`.
+ */
+contract ERC20 is IERC20 {
+    using SafeMath for uint256;
+
+    mapping (address => uint256) private _balances;
+
+    mapping (address => mapping (address => uint256)) private _allowances;
+
+    uint256 private _totalSupply;
+
+    /**
+     * @dev See `IERC20.totalSupply`.
+     */
+    function totalSupply() public view override returns (uint256) {
+        return _totalSupply;
+    }
+
+    /**
+     * @dev See `IERC20.balanceOf`.
+     */
+    function balanceOf(address account) public view override returns (uint256) {
+        return _balances[account];
+    }
+
+    /**
+     * @dev See `IERC20.transfer`.
+     *
+     * Requirements:
+     *
+     * - `recipient` cannot be the zero address.
+     * - the caller must have a balance of at least `amount`.
+     */
+    function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
+        _transfer(msg.sender, recipient, amount);
+        return true;
+    }
+
+    /**
+     * @dev See `IERC20.allowance`.
+     */
+    function allowance(address owner, address spender) public virtual override view returns (uint256) {
+        return _allowances[owner][spender];
+    }
+
+    /**
+     * @dev See `IERC20.approve`.
+     *
+     * Requirements:
+     *
+     * - `spender` cannot be the zero address.
+     */
+    function approve(address spender, uint256 value) public virtual override returns (bool) {
+        _approve(msg.sender, spender, value);
+        return true;
+    }
+
+    /**
+     * @dev See `IERC20.transferFrom`.
+     *
+     * Emits an `Approval` event indicating the updated allowance. This is not
+     * required by the EIP. See the note at the beginning of `ERC20`;
+     *
+     * Requirements:
+     * - `sender` and `recipient` cannot be the zero address.
+     * - `sender` must have a balance of at least `value`.
+     * - the caller must have allowance for `sender`'s tokens of at least
+     * `amount`.
+     */
+    function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
+        _transfer(sender, recipient, amount);
+        _approve(sender, msg.sender, _allowances[sender][msg.sender].sub(amount));
+        return true;
+    }
+
+    /**
+     * @dev Atomically increases the allowance granted to `spender` by the caller.
+     *
+     * This is an alternative to `approve` that can be used as a mitigation for
+     * problems described in `IERC20.approve`.
+     *
+     * Emits an `Approval` event indicating the updated allowance.
+     *
+     * Requirements:
+     *
+     * - `spender` cannot be the zero address.
+     */
+    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
+        _approve(msg.sender, spender, _allowances[msg.sender][spender].add(addedValue));
+        return true;
+    }
+
+    /**
+     * @dev Atomically decreases the allowance granted to `spender` by the caller.
+     *
+     * This is an alternative to `approve` that can be used as a mitigation for
+     * problems described in `IERC20.approve`.
+     *
+     * Emits an `Approval` event indicating the updated allowance.
+     *
+     * Requirements:
+     *
+     * - `spender` cannot be the zero address.
+     * - `spender` must have allowance for the caller of at least
+     * `subtractedValue`.
+     */
+    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
+        _approve(msg.sender, spender, _allowances[msg.sender][spender].sub(subtractedValue));
+        return true;
+    }
+
+    /**
+     * @dev Moves tokens `amount` from `sender` to `recipient`.
+     *
+     * This is internal function is equivalent to `transfer`, and can be used to
+     * e.g. implement automatic token fees, slashing mechanisms, etc.
+     *
+     * Emits a `Transfer` event.
+     *
+     * Requirements:
+     *
+     * - `sender` cannot be the zero address.
+     * - `recipient` cannot be the zero address.
+     * - `sender` must have a balance of at least `amount`.
+     */
+    function _transfer(address sender, address recipient, uint256 amount) internal virtual {
+        require(sender != address(0), "ERC20: transfer from the zero address");
+        require(recipient != address(0), "ERC20: transfer to the zero address");
+
+        _balances[sender] = _balances[sender].sub(amount);
+        _balances[recipient] = _balances[recipient].add(amount);
+        emit Transfer(sender, recipient, amount);
+    }
+
+    /** @dev Creates `amount` tokens and assigns them to `account`, increasing
+     * the total supply.
+     *
+     * Emits a `Transfer` event with `from` set to the zero address.
+     *
+     * Requirements
+     *
+     * - `to` cannot be the zero address.
+     */
+    function _mint(address account, uint256 amount) internal virtual {
+        require(account != address(0), "ERC20: mint to the zero address");
+
+        _totalSupply = _totalSupply.add(amount);
+        _balances[account] = _balances[account].add(amount);
+        emit Transfer(address(0), account, amount);
+    }
+
+     /**
+     * @dev Destoys `amount` tokens from `account`, reducing the
+     * total supply.
+     *
+     * Emits a `Transfer` event with `to` set to the zero address.
+     *
+     * Requirements
+     *
+     * - `account` cannot be the zero address.
+     * - `account` must have at least `amount` tokens.
+     */
+    function _burn(address account, uint256 value) internal virtual {
+        require(account != address(0), "ERC20: burn from the zero address");
+
+        _totalSupply = _totalSupply.sub(value);
+        _balances[account] = _balances[account].sub(value);
+        emit Transfer(account, address(0), value);
+    }
+
+    /**
+     * @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.
+     *
+     * This is internal function is equivalent to `approve`, and can be used to
+     * e.g. set automatic allowances for certain subsystems, etc.
+     *
+     * Emits an `Approval` event.
+     *
+     * Requirements:
+     *
+     * - `owner` cannot be the zero address.
+     * - `spender` cannot be the zero address.
+     */
+    function _approve(address owner, address spender, uint256 value) internal virtual {
+        require(owner != address(0), "ERC20: approve from the zero address");
+        require(spender != address(0), "ERC20: approve to the zero address");
+
+        _allowances[owner][spender] = value;
+        emit Approval(owner, spender, value);
+    }
+
+    /**
+     * @dev Destoys `amount` tokens from `account`.`amount` is then deducted
+     * from the caller's allowance.
+     *
+     * See `_burn` and `_approve`.
+     */
+    function _burnFrom(address account, uint256 amount) internal {
+        _burn(account, amount);
+        _approve(account, msg.sender, _allowances[account][msg.sender].sub(amount));
+    }
+}
diff --git a/smart-contracts/test/zilbridge/tokens/switcheo/libs/token/ERC20/ERC20Detailed.sol b/smart-contracts/test/zilbridge/tokens/switcheo/libs/token/ERC20/ERC20Detailed.sol
new file mode 100644
index 0000000..9a356fb
--- /dev/null
+++ b/smart-contracts/test/zilbridge/tokens/switcheo/libs/token/ERC20/ERC20Detailed.sol
@@ -0,0 +1,54 @@
+// SPDX-License-Identifier: MIT
+
+pragma solidity 0.8.20;
+
+/**
+ * @dev Optional functions from the ERC20 standard.
+ */
+contract ERC20Detailed {
+    string private _name;
+    string private _symbol;
+    uint8 private _decimals;
+
+    /**
+     * @dev Sets the values for `name`, `symbol`, and `decimals`. All three of
+     * these values are immutable: they can only be set once during
+     * construction.
+     */
+    constructor (string memory name_, string memory symbol_, uint8 decimals_) {
+        _name = name_;
+        _symbol = symbol_;
+        _decimals = decimals_;
+    }
+
+    /**
+     * @dev Returns the name of the token.
+     */
+    function name() public view returns (string memory) {
+        return _name;
+    }
+
+    /**
+     * @dev Returns the symbol of the token, usually a shorter version of the
+     * name.
+     */
+    function symbol() public view returns (string memory) {
+        return _symbol;
+    }
+
+    /**
+     * @dev Returns the number of decimals used to get its user representation.
+     * For example, if `decimals` equals `2`, a balance of `505` tokens should
+     * be displayed to a user as `5,05` (`505 / 10 ** 2`).
+     *
+     * Tokens usually opt for a value of 18, imitating the relationship between
+     * Ether and Wei.
+     *
+     * > Note that this information is only used for _display_ purposes: it in
+     * no way affects any of the arithmetic of the contract, including
+     * `IERC20.balanceOf` and `IERC20.transfer`.
+     */
+    function decimals() public view returns (uint8) {
+        return _decimals;
+    }
+}
diff --git a/smart-contracts/test/zilbridge/tokens/switcheo/libs/token/ERC20/IERC20.sol b/smart-contracts/test/zilbridge/tokens/switcheo/libs/token/ERC20/IERC20.sol
new file mode 100644
index 0000000..a9a1319
--- /dev/null
+++ b/smart-contracts/test/zilbridge/tokens/switcheo/libs/token/ERC20/IERC20.sol
@@ -0,0 +1,77 @@
+// SPDX-License-Identifier: MIT
+
+pragma solidity 0.8.20;
+
+/**
+ * @dev Interface of the ERC20 standard as defined in the EIP.
+ */
+interface IERC20 {
+    /**
+     * @dev Returns the amount of tokens in existence.
+     */
+    function totalSupply() external view returns (uint256);
+
+    /**
+     * @dev Returns the amount of tokens owned by `account`.
+     */
+    function balanceOf(address account) external view returns (uint256);
+
+    /**
+     * @dev Moves `amount` tokens from the caller's account to `recipient`.
+     *
+     * Returns a boolean value indicating whether the operation succeeded.
+     *
+     * Emits a {Transfer} event.
+     */
+    function transfer(address recipient, uint256 amount) external returns (bool);
+
+    /**
+     * @dev Returns the remaining number of tokens that `spender` will be
+     * allowed to spend on behalf of `owner` through {transferFrom}. This is
+     * zero by default.
+     *
+     * This value changes when {approve} or {transferFrom} are called.
+     */
+    function allowance(address owner, address spender) external view returns (uint256);
+
+    /**
+     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
+     *
+     * Returns a boolean value indicating whether the operation succeeded.
+     *
+     * IMPORTANT: Beware that changing an allowance with this method brings the risk
+     * that someone may use both the old and the new allowance by unfortunate
+     * transaction ordering. One possible solution to mitigate this race
+     * condition is to first reduce the spender's allowance to 0 and set the
+     * desired value afterwards:
+     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
+     *
+     * Emits an {Approval} event.
+     */
+    function approve(address spender, uint256 amount) external returns (bool);
+
+    /**
+     * @dev Moves `amount` tokens from `sender` to `recipient` using the
+     * allowance mechanism. `amount` is then deducted from the caller's
+     * allowance.
+     *
+     * Returns a boolean value indicating whether the operation succeeded.
+     *
+     * Emits a {Transfer} event.
+     */
+    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
+
+    /**
+     * @dev Emitted when `value` tokens are moved from one account (`from`) to
+     * another (`to`).
+     *
+     * Note that `value` may be zero.
+     */
+    event Transfer(address indexed from, address indexed to, uint256 value);
+
+    /**
+     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
+     * a call to {approve}. `value` is the new allowance.
+     */
+    event Approval(address indexed owner, address indexed spender, uint256 value);
+}
diff --git a/smart-contracts/test/zilbridge/tokens/switcheo/tokens/SwitcheoTokenETH.sol b/smart-contracts/test/zilbridge/tokens/switcheo/tokens/SwitcheoTokenETH.sol
new file mode 100644
index 0000000..960f454
--- /dev/null
+++ b/smart-contracts/test/zilbridge/tokens/switcheo/tokens/SwitcheoTokenETH.sol
@@ -0,0 +1,48 @@
+// SPDX-License-Identifier: MIT
+
+pragma solidity 0.8.20;
+
+import "../libs/token/ERC20/ERC20.sol";
+import "../libs/token/ERC20/ERC20Detailed.sol";
+import "../libs/math/SafeMath.sol";
+
+/**
+* @title SwitcheoToken - Switcheo Token for Ethereum.
+*
+* @dev Standard ERC20 that mints from the PoS lock
+* contract. Does not burn after transferring to the lock contract
+* as the lock contract checks for balance after deposits.
+* https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20.md
+*/
+contract SwitcheoToken is ERC20, ERC20Detailed {
+  using SafeMath for uint256;
+
+  address public lockProxyAddress;
+
+  /// Added by rrw to make testing easier.
+  constructor(address _lockProxyAddress, string memory tokenName, string memory tokenSymbol, uint8 decimals)
+      ERC20Detailed(tokenName, tokenSymbol, decimals) {
+    lockProxyAddress = _lockProxyAddress;
+  }
+
+  //constructor(address _lockProxyAddress) ERC20Detailed("ZilBridge_Test_ETH_Bridged", "ZTEB", 8) {
+  //lockProxyAddress = _lockProxyAddress;
+      // }
+
+  function _transfer(address sender, address recipient, uint256 amount) internal override {
+      if (sender == lockProxyAddress) {
+          require(recipient != lockProxyAddress, "SwitcheoToken: lockProxy should not call transfer to self");
+          // lockProxy is the primary minter - so mint whenever required.
+          uint256 balance = balanceOf(lockProxyAddress);
+          if (balance < amount) {
+            _mint(lockProxyAddress, amount.sub(balance));
+          }
+      }
+
+      super._transfer(sender, recipient, amount);
+  }
+
+  function circulatingSupply() external view returns (uint256 amount) {
+      return totalSupply().sub(balanceOf(lockProxyAddress));
+  }
+}
diff --git a/smart-contracts/test/zilbridge/tokens/zrc2erc20/ScillaConnector.sol b/smart-contracts/test/zilbridge/tokens/zrc2erc20/ScillaConnector.sol
new file mode 100644
index 0000000..63f86ca
--- /dev/null
+++ b/smart-contracts/test/zilbridge/tokens/zrc2erc20/ScillaConnector.sol
@@ -0,0 +1,238 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+pragma solidity ^0.8.20;
+
+library ScillaConnector {
+    uint private constant CALL_SCILLA_WITH_THE_SAME_SENDER = 1;
+    uint private constant SCILLA_CALL_PRECOMPILE_ADDRESS = 0x5a494c53;
+    uint private constant SCILLA_STATE_READ_PRECOMPILE_ADDRESS = 0x5a494c92;
+
+    /**
+     * @dev Calls a ZRC2 contract function with two arguments
+     * @param target The address of the ZRC2 contract
+     * @param tran_name The name of the function to call
+     * @param arg1 The first argument to the function
+     * @param arg2 The second argument to the function
+     */
+    function call(
+        address target,
+        string memory tran_name,
+        address arg1,
+        uint128 arg2
+    ) internal {
+        bytes memory encodedArgs = abi.encode(
+            target,
+            tran_name,
+            CALL_SCILLA_WITH_THE_SAME_SENDER,
+            arg1,
+            arg2
+        );
+        uint256 argsLength = encodedArgs.length;
+
+        assembly {
+            let alwaysSuccessForThisPrecompile := call(
+                21000,
+                SCILLA_CALL_PRECOMPILE_ADDRESS,
+                0,
+                add(encodedArgs, 0x20),
+                argsLength,
+                0x20,
+                0
+            )
+        }
+    }
+
+    /**
+     * @dev Calls a ZRC2 contract function with three arguments
+     * @param target The address of the ZRC2 contract
+     * @param tran_name The name of the function to call on the ZRC2 contract
+     * @param arg1 The first argument to the function
+     * @param arg2 The second argument to the function
+     * @param arg3 The third argument to the function
+     */
+    function call(
+        address target,
+        string memory tran_name,
+        address arg1,
+        address arg2,
+        uint128 arg3
+    ) internal {
+        bytes memory encodedArgs = abi.encode(
+            target,
+            tran_name,
+            CALL_SCILLA_WITH_THE_SAME_SENDER,
+            arg1,
+            arg2,
+            arg3
+        );
+        uint256 argsLength = encodedArgs.length;
+
+        assembly {
+            let alwaysSuccessForThisPrecompile := call(
+                21000,
+                SCILLA_CALL_PRECOMPILE_ADDRESS,
+                0,
+                add(encodedArgs, 0x20),
+                argsLength,
+                0x20,
+                0
+            )
+        }
+    }
+
+    /**
+     * @dev Reads a 128 bit integer from a ZRC2 contract
+     * @param target The address of the ZRC2 contract
+     * @param variable_name The name of the variable to read from the ZRC2 contract
+     * @return The value of the variable
+     */
+    function readUint128(
+        address target,
+        string memory variable_name
+    ) internal view returns (uint128) {
+        bytes memory encodedArgs = abi.encode(target, variable_name);
+        uint256 argsLength = encodedArgs.length;
+        bytes memory output = new bytes(36);
+
+        assembly {
+            let alwaysSuccessForThisPrecompile := staticcall(
+                21000,
+                SCILLA_STATE_READ_PRECOMPILE_ADDRESS,
+                add(encodedArgs, 0x20),
+                argsLength,
+                add(output, 0x20),
+                32
+            )
+        }
+
+        return abi.decode(output, (uint128));
+    }
+
+    /**
+     * @dev Reads a 32 bit integer from a ZRC2 contract
+     * @param target The address of the ZRC2 contract
+     * @param variable_name The name of the variable to read from the ZRC2 contract
+     * @return The value of the variable
+     */
+    function readUint32(
+        address target,
+        string memory variable_name
+    ) internal view returns (uint32) {
+        bytes memory encodedArgs = abi.encode(target, variable_name);
+        uint256 argsLength = encodedArgs.length;
+        bytes memory output = new bytes(36);
+
+        assembly {
+            let alwaysSuccessForThisPrecompile := staticcall(
+                21000,
+                SCILLA_STATE_READ_PRECOMPILE_ADDRESS,
+                add(encodedArgs, 0x20),
+                argsLength,
+                add(output, 0x20),
+                32
+            )
+        }
+
+        return abi.decode(output, (uint32));
+    }
+
+    /**
+     * @dev Reads a string from a ZRC2 contract
+     * @param target The address of the ZRC2 contract
+     * @param variable_name The name of the variable to read from the ZRC2 contract
+     * @return retVal The value of the variable
+     */
+    function readString(
+        address target,
+        string memory variable_name
+    ) internal view returns (string memory retVal) {
+        bytes memory encodedArgs = abi.encode(target, variable_name);
+        uint256 argsLength = encodedArgs.length;
+        bool success;
+        bytes memory output = new bytes(128);
+        uint256 output_len = output.length - 4;
+        assembly {
+            success := staticcall(
+                21000,
+                SCILLA_STATE_READ_PRECOMPILE_ADDRESS,
+                add(encodedArgs, 0x20),
+                argsLength,
+                add(output, 0x20),
+                output_len
+            )
+        }
+        require(success);
+
+        (retVal) = abi.decode(output, (string));
+        return retVal;
+    }
+
+    /**
+     * @dev Reads a 128 bit integer from a map in a ZRC2 contract
+     * @param variable_name The name of the map in the ZRC2 contract
+     * @param addressMapKey The key to the map
+     * @return The value associated with the key in the map
+     */
+    function readMapUint128(
+        address target,
+        string memory variable_name,
+        address addressMapKey
+    ) internal view returns (uint128) {
+        bytes memory encodedArgs = abi.encode(
+            target,
+            variable_name,
+            addressMapKey
+        );
+        uint256 argsLength = encodedArgs.length;
+        bytes memory output = new bytes(36);
+
+        assembly {
+            let alwaysSuccessForThisPrecompile := staticcall(
+                21000,
+                SCILLA_STATE_READ_PRECOMPILE_ADDRESS,
+                add(encodedArgs, 0x20),
+                argsLength,
+                add(output, 0x20),
+                32
+            )
+        }
+
+        return abi.decode(output, (uint128));
+    }
+
+    /**
+     * @dev Reads a 128 bit integer from a nested map in a ZRC2 contract
+     * @param target The address of the ZRC2 contract
+     * @param variable_name The name of the map in the ZRC2 contract
+     * @param firstMapKey The first key to the map
+     * @param secondMapKey The second key to the map
+     * @return The value associated with the keys in the map
+     */
+    function readNestedMapUint128(
+        address target,
+        string memory variable_name,
+        address firstMapKey,
+        address secondMapKey
+    ) internal view returns (uint128) {
+        bytes memory encodedArgs = abi.encode(
+            target,
+            variable_name,
+            firstMapKey,
+            secondMapKey
+        );
+        uint256 argsLength = encodedArgs.length;
+        bytes memory output = new bytes(36);
+
+        assembly {
+            let alwaysSuccessForThisPrecompile := staticcall(
+                21000,
+                SCILLA_STATE_READ_PRECOMPILE_ADDRESS,
+                add(encodedArgs, 0x20),
+                argsLength,
+                add(output, 0x20),
+                32
+            )
+        }
+
+        return abi.decode(output, (uint128));
+    }
+}
diff --git a/smart-contracts/test/zilbridge/tokens/zrc2erc20/ZRC2ProxyForZRC2.sol b/smart-contracts/test/zilbridge/tokens/zrc2erc20/ZRC2ProxyForZRC2.sol
new file mode 100644
index 0000000..4332aeb
--- /dev/null
+++ b/smart-contracts/test/zilbridge/tokens/zrc2erc20/ZRC2ProxyForZRC2.sol
@@ -0,0 +1,116 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+pragma solidity ^0.8.20;
+
+import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
+import {SafeCast} from "@openzeppelin/contracts/utils/math/SafeCast.sol";
+import {ScillaConnector} from "./ScillaConnector.sol";
+
+contract ZRC2ProxyForZRC2 is IERC20 {
+    using ScillaConnector for address;
+    using SafeCast for uint256;
+
+    address public zrc2_proxy;
+
+    // Additional variables useful for wallets
+    uint8 public decimals;
+    string public symbol;
+    string public name;
+
+    /**
+     * @notice Constructs a new ZRC2Proxy contract
+     * @param zrc2_address The address of the underlying ZRC2 contract
+     */
+    constructor(address zrc2_address) {
+        zrc2_proxy = zrc2_address;
+
+        symbol = zrc2_proxy.readString("symbol");
+        decimals = uint256(zrc2_proxy.readUint32("decimals")).toUint8();
+        name = zrc2_proxy.readString("name");
+    }
+
+    /**
+     * @notice Get the total supply of tokens
+     * @return The total supply of tokens
+     */
+    function totalSupply() external view returns (uint256) {
+        return zrc2_proxy.readUint128("total_supply");
+    }
+
+    /**
+     * @notice Get the token balance for a specific account
+     * @param tokenOwner The address of the account
+     * @return The balance of the account
+     */
+    function balanceOf(address tokenOwner) external view returns (uint256) {
+        return zrc2_proxy.readMapUint128("balances", tokenOwner);
+    }
+
+    /**
+     * @notice Transfer tokens to a specified address
+     * @param to The address to transfer to
+     * @param tokens The amount of tokens to transfer
+     * @return true if transfer was successful
+     */
+    function transfer(address to, uint256 tokens) external returns (bool) {
+        zrc2_proxy.call("Transfer", to, tokens.toUint128());
+        return true;
+    }
+
+    /**
+     * @notice Transfer tokens from one address to another
+     * @param from The address to transfer from
+     * @param to The address to transfer to
+     * @param tokens The amount of tokens to transfer
+     * @return true if transfer was successful
+     */
+    function transferFrom(
+        address from,
+        address to,
+        uint256 tokens
+    ) external returns (bool) {
+        zrc2_proxy.call("TransferFrom", from, to, tokens.toUint128());
+        return true;
+    }
+
+    /**
+     * @notice Check the amount of tokens that an owner has allowed a spender to use
+     * @param tokenOwner The address of the token owner
+     * @param spender The address of the spender
+     * @return The amount of tokens remaining for the spender
+     */
+    function allowance(
+        address tokenOwner,
+        address spender
+    ) external view returns (uint256) {
+        return
+            zrc2_proxy.readNestedMapUint128("allowances", tokenOwner, spender);
+    }
+
+    /**
+     * @notice Approve a spender to spend a certain amount of tokens
+     * @param spender The address of the spender
+     * @param new_allowance The new allowance for the spender
+     * @return true if approval was successful
+     */
+    function approve(
+        address spender,
+        uint256 new_allowance
+    ) external returns (bool) {
+        uint256 current_allowance = this.allowance(msg.sender, spender);
+
+        if (current_allowance >= new_allowance) {
+            zrc2_proxy.call(
+                "DecreaseAllowance",
+                spender,
+                (current_allowance - new_allowance).toUint128()
+            );
+        } else {
+            zrc2_proxy.call(
+                "IncreaseAllowance",
+                spender,
+                (new_allowance - current_allowance).toUint128()
+            );
+        }
+        return true;
+    }
+}

From d9dae63c0181490724986ea4f652cf87fa618571 Mon Sep 17 00:00:00 2001
From: Richard Watts <richard@zilliqa.com>
Date: Fri, 30 Aug 2024 18:31:00 +0100
Subject: [PATCH 3/4] (feat) Update trunk in an attempt to get it to obey the
 configuration file.

---
 .trunk/trunk.yaml | 51 ++++++++++++++++++++++++-----------------------
 1 file changed, 26 insertions(+), 25 deletions(-)

diff --git a/.trunk/trunk.yaml b/.trunk/trunk.yaml
index d510944..b63321c 100644
--- a/.trunk/trunk.yaml
+++ b/.trunk/trunk.yaml
@@ -1,36 +1,39 @@
+# This file controls the behavior of Trunk: https://docs.trunk.io/cli
+# To learn more about the format of this file, see https://docs.trunk.io/reference/trunk-yaml
 version: 0.1
 cli:
-  version: 1.22.3
+  version: 1.22.4
+# Trunk provides extensibility via plugins. (https://docs.trunk.io/plugins)
 plugins:
   sources:
     - id: trunk
       ref: v1.6.2
       uri: https://github.com/trunk-io/plugins
-
+# Many linters and tools depend on runtimes - configure them here. (https://docs.trunk.io/runtimes)
+runtimes:
+  enabled:
+    - node@18.12.1
+    - python@3.10.8
+# This is the section where you manage your linters. (https://docs.trunk.io/check/configuration)
 lint:
   enabled:
-    - clippy@1.79.0
-    - gofmt@1.20.4
-    - golangci-lint@1.60.2
-    - oxipng@9.1.2
-    - shellcheck@0.10.0
-    - taplo@0.9.3
     - actionlint@1.7.1
-    - hadolint@2.12.0
-    - eslint@9.9.0
-    - buildifier@7.1.2
+    - checkov@3.2.239
+    - clippy@1.79.0
     - git-diff-check
+    - hadolint@2.12.0
     - markdownlint@0.41.0
+    - osv-scanner@1.8.4
+    - oxipng@9.1.2
     - prettier@3.3.3
-    - shfmt@3.6.0
-    - svgo@3.3.2
-    - gitleaks@8.18.4
-    - flake8@7.1.1
-    - isort@5.13.2
-    - black@24.8.0
-    - rustfmt@1.79.0
-    # - shellcheck@0.9.0 - removed for being over-prissy and wanting tab indents - rrw 2023-04-25
+    - rustfmt@1.65.0
+    - taplo@0.9.3
+    - trufflehog@3.81.10
+    - yamllint@1.35.1
   ignore:
+    - linters: [osv-scanner]
+      paths:
+        - scilla-contracts/**
     - linters: [gitleaks]
       paths:
         - smart-contracts/script/config.ts
@@ -39,6 +42,7 @@ lint:
     - linters: [eslint]
       paths:
         - bridge-web
+        - scilla-contracts
     - linters: [ALL]
       paths:
         - .devcontainer/*
@@ -57,15 +61,12 @@ lint:
         - "**/templates/*"
         - "templates/**"
         - "**/templates/**"
+        - smart-contracts/test/zilbridge/tokens/switcheo/**
 
-runtimes:
-  enabled:
-    - go@1.21.0
-    - node@18.12.1
-    - python@3.10.8
 actions:
-  enabled:
+  disabled:
     - trunk-announce
     - trunk-check-pre-push
     - trunk-fmt-pre-commit
+  enabled:
     - trunk-upgrade-available

From 4485678acb576db04984c813e21bcd58dc765686 Mon Sep 17 00:00:00 2001
From: Richard Watts <richard@zilliqa.com>
Date: Fri, 30 Aug 2024 18:39:34 +0100
Subject: [PATCH 4/4] (fix) Trunk now complains about its own auto-generated
 default config file.

---
 .trunk/trunk.yaml | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/.trunk/trunk.yaml b/.trunk/trunk.yaml
index b63321c..4cf4be8 100644
--- a/.trunk/trunk.yaml
+++ b/.trunk/trunk.yaml
@@ -1,20 +1,24 @@
 # This file controls the behavior of Trunk: https://docs.trunk.io/cli
-# To learn more about the format of this file, see https://docs.trunk.io/reference/trunk-yaml
+# To learn more about the format of this file,
+# see https://docs.trunk.io/reference/trunk-yaml
 version: 0.1
 cli:
   version: 1.22.4
-# Trunk provides extensibility via plugins. (https://docs.trunk.io/plugins)
+# Trunk provides extensibility via plugins.
+# (https://docs.trunk.io/plugins)
 plugins:
   sources:
     - id: trunk
       ref: v1.6.2
       uri: https://github.com/trunk-io/plugins
-# Many linters and tools depend on runtimes - configure them here. (https://docs.trunk.io/runtimes)
+# Many linters and tools depend on runtimes -
+# configure them here. (https://docs.trunk.io/runtimes)
 runtimes:
   enabled:
     - node@18.12.1
     - python@3.10.8
-# This is the section where you manage your linters. (https://docs.trunk.io/check/configuration)
+# This is the section where you manage your linters.
+# (https://docs.trunk.io/check/configuration)
 lint:
   enabled:
     - actionlint@1.7.1