[testnet] Add AssetHubRococo <-> AssetHubWestend asset bridging s…

…upport (paritytech#1967)

## Summary

Asset bridging support for AssetHub**Rococo** <-> AssetHub**Wococo** was
added [here](paritytech#1215), so
now we aim to bridge AssetHub**Rococo** and AssetHub**Westend**. (And
perhaps retire AssetHubWococo and the Wococo chains).

## Solution

**bridge-hub-westend-runtime**
- added new runtime as a copy of `bridge-hub-rococo-runtime`
- added support for bridging to `BridgeHubRococo`
- added tests and benchmarks

**bridge-hub-rococo-runtime**
- added support for bridging to `BridgeHubWestend`
- added tests and benchmarks
- internal refactoring by splitting bridge configuration per network,
e.g., `bridge_to_whatevernetwork_config.rs`.

**asset-hub-rococo-runtime**
- added support for asset bridging to `AssetHubWestend` (allows to
receive only WNDs)
- added new xcm router for `Westend`
- added tests and benchmarks

**asset-hub-westend-runtime**
- added support for asset bridging to `AssetHubRococo` (allows to
receive only ROCs)
- added new xcm router for `Rococo`
- added tests and benchmarks

## Deployment

All changes will be deployed as a part of
paritytech#1988.

## TODO

- [x] benchmarks for all pallet instances
- [x] integration tests
- [x] local run scripts


Relates to:
paritytech/parity-bridges-common#2602
Relates to: paritytech#1988

---------

Co-authored-by: command-bot <>
Co-authored-by: Adrian Catangiu <[email protected]>
Co-authored-by: joe petrowski <[email protected]>

Cargo.toml

@@ -17,16 +17,19 @@ members = [
 	"bridges/primitives/chain-asset-hub-kusama",
 	"bridges/primitives/chain-asset-hub-polkadot",
 	"bridges/primitives/chain-asset-hub-rococo",
+	"bridges/primitives/chain-asset-hub-westend",
 	"bridges/primitives/chain-asset-hub-wococo",
 	"bridges/primitives/chain-bridge-hub-cumulus",
 	"bridges/primitives/chain-bridge-hub-kusama",
 	"bridges/primitives/chain-bridge-hub-polkadot",
 	"bridges/primitives/chain-bridge-hub-rococo",
+	"bridges/primitives/chain-bridge-hub-westend",
 	"bridges/primitives/chain-bridge-hub-wococo",
 	"bridges/primitives/chain-kusama",
 	"bridges/primitives/chain-polkadot",
 	"bridges/primitives/chain-polkadot-bulletin",
 	"bridges/primitives/chain-rococo",
+	"bridges/primitives/chain-westend",
 	"bridges/primitives/chain-wococo",
 	"bridges/primitives/header-chain",
 	"bridges/primitives/messages",
@@ -78,6 +81,7 @@ members = [
 	"cumulus/parachains/runtimes/bridge-hubs/bridge-hub-kusama",
 	"cumulus/parachains/runtimes/bridge-hubs/bridge-hub-polkadot",
 	"cumulus/parachains/runtimes/bridge-hubs/bridge-hub-rococo",
+	"cumulus/parachains/runtimes/bridge-hubs/bridge-hub-westend",
 	"cumulus/parachains/runtimes/bridge-hubs/test-utils",
 	"cumulus/parachains/runtimes/collectives/collectives-polkadot",
 	"cumulus/parachains/runtimes/contracts/contracts-rococo",

bridges/modules/relayers/src/lib.rs

@@ -325,6 +325,12 @@ pub mod pallet {
 						rewards_account_params,
 						new_reward,
 					);
+
+					Self::deposit_event(Event::<T>::RewardRegistered {
+						relayer: relayer.clone(),
+						rewards_account_params,
+						reward,
+					});
 				},
 			);
 		}
@@ -369,6 +375,15 @@ pub mod pallet {
 	#[pallet::event]
 	#[pallet::generate_deposit(pub(super) fn deposit_event)]
 	pub enum Event<T: Config> {
+		/// Relayer reward has been registered and may be claimed later.
+		RewardRegistered {
+			/// Relayer account that can claim reward.
+			relayer: T::AccountId,
+			/// Relayer can claim reward from this account.
+			rewards_account_params: RewardsAccountParams,
+			/// Reward amount.
+			reward: T::Reward,
+		},
 		/// Reward has been paid to the relayer.
 		RewardPaid {
 			/// Relayer account that has been rewarded.
@@ -455,7 +470,7 @@ mod tests {
 	use super::*;
 	use mock::{RuntimeEvent as TestEvent, *};
 
-	use crate::Event::RewardPaid;
+	use crate::Event::{RewardPaid, RewardRegistered};
 	use bp_messages::LaneId;
 	use bp_relayers::RewardsAccountOwner;
 	use frame_support::{
@@ -470,6 +485,33 @@ mod tests {
 		System::<TestRuntime>::reset_events();
 	}
 
+	#[test]
+	fn register_relayer_reward_emit_event() {
+		run_test(|| {
+			get_ready_for_events();
+
+			Pallet::<TestRuntime>::register_relayer_reward(
+				TEST_REWARDS_ACCOUNT_PARAMS,
+				&REGULAR_RELAYER,
+				100,
+			);
+
+			// Check if the `RewardRegistered` event was emitted.
+			assert_eq!(
+				System::<TestRuntime>::events().last(),
+				Some(&EventRecord {
+					phase: Phase::Initialization,
+					event: TestEvent::Relayers(RewardRegistered {
+						relayer: REGULAR_RELAYER,
+						rewards_account_params: TEST_REWARDS_ACCOUNT_PARAMS,
+						reward: 100
+					}),
+					topics: vec![],
+				}),
+			);
+		});
+	}
+
 	#[test]
 	fn root_cant_claim_anything() {
 		run_test(|| {

bridges/modules/xcm-bridge-hub-router/src/lib.rs

@@ -335,7 +335,7 @@ impl<T: Config<I>, I: 'static> SendXcm for Pallet<T, I> {
 		// just use exporter to validate destination and insert instructions to pay message fee
 		// at the sibling/child bridge hub
 		//
-		// the cost will include both cost of: (1) to-sibling bridg hub delivery (returned by
+		// the cost will include both cost of: (1) to-sibling bridge hub delivery (returned by
 		// the `Config::ToBridgeHubSender`) and (2) to-bridged bridge hub delivery (returned by
 		// `Self::exporter_for`)
 		ViaBridgeHubExporter::<T, I>::validate(dest, xcm)

bridges/primitives/chain-asset-hub-rococo/src/lib.rs

@@ -37,15 +37,18 @@ pub enum Call {
 	/// `ToWococoXcmRouter` bridge pallet.
 	#[codec(index = 43)]
 	ToWococoXcmRouter(XcmBridgeHubRouterCall),
+	/// `ToWestendXcmRouter` bridge pallet.
+	#[codec(index = 45)]
+	ToWestendXcmRouter(XcmBridgeHubRouterCall),
 }
 
 frame_support::parameter_types! {
 	/// Some sane weight to execute `xcm::Transact(pallet-xcm-bridge-hub-router::Call::report_bridge_status)`.
 	pub const XcmBridgeHubRouterTransactCallMaxWeight: frame_support::weights::Weight = frame_support::weights::Weight::from_parts(200_000_000, 6144);
 
 	/// Base delivery fee to `BridgeHubRococo`.
-	/// (initially was calculated by test `BridgeHubRococo::can_calculate_weight_for_paid_export_message_with_reserve_transfer`)
-	pub const BridgeHubRococoBaseFeeInRocs: u128 = 1214739988;
+	/// (initially was calculated by test `BridgeHubRococo::can_calculate_weight_for_paid_export_message_with_reserve_transfer` + `33%`)
+	pub const BridgeHubRococoBaseFeeInRocs: u128 = 1624803349;
 }
 
 /// Identifier of AssetHubRococo in the Rococo relay chain.

bridges/primitives/chain-asset-hub-westend/Cargo.toml

@@ -0,0 +1,26 @@
+[package]
+name = "bp-asset-hub-westend"
+description = "Primitives of AssetHubWestend parachain runtime."
+version = "0.1.0"
+authors.workspace = true
+edition.workspace = true
+license = "GPL-3.0-or-later WITH Classpath-exception-2.0"
+
+[dependencies]
+codec = { package = "parity-scale-codec", version = "3.1.5", default-features = false }
+scale-info = { version = "2.10.0", default-features = false, features = ["derive"] }
+
+# Substrate Dependencies
+frame-support = { path = "../../../substrate/frame/support", default-features = false }
+
+# Bridge Dependencies
+bp-xcm-bridge-hub-router = { path = "../xcm-bridge-hub-router", default-features = false }
+
+[features]
+default = [ "std" ]
+std = [
+	"bp-xcm-bridge-hub-router/std",
+	"codec/std",
+	"frame-support/std",
+	"scale-info/std",
+]