From 4f0299083768a7080c53d0783c32d02408614c37 Mon Sep 17 00:00:00 2001
From: Paul Dann <paul@eiger.co>
Date: Fri, 6 Dec 2024 16:38:24 +0000
Subject: [PATCH] sighash: move burn_amount into header_digest

---
 zcash_test_vectors/zip_0244.py |  1 +
 zcash_test_vectors/zip_nsm.py  | 59 ----------------------------------
 2 files changed, 1 insertion(+), 59 deletions(-)

diff --git a/zcash_test_vectors/zip_0244.py b/zcash_test_vectors/zip_0244.py
index dbf41e9..3b08059 100755
--- a/zcash_test_vectors/zip_0244.py
+++ b/zcash_test_vectors/zip_0244.py
@@ -188,6 +188,7 @@ def header_digest(tx):
     digest.update(struct.pack('<I', tx.nConsensusBranchId))
     digest.update(struct.pack('<I', tx.nLockTime))
     digest.update(struct.pack('<I', tx.nExpiryHeight))
+    digest.update(struct.pack('<Q', tx.burnAmount))
 
     return digest.digest()
 
diff --git a/zcash_test_vectors/zip_nsm.py b/zcash_test_vectors/zip_nsm.py
index cbf4a49..d0af90f 100755
--- a/zcash_test_vectors/zip_nsm.py
+++ b/zcash_test_vectors/zip_nsm.py
@@ -19,65 +19,6 @@
 
 from .zip_0244 import *
 
-def auth_digest(tx):
-    digest = blake2b(
-        digest_size=32,
-        person=b'ZTxAuthHash_' + struct.pack('<I', tx.nConsensusBranchId),
-    )
-
-    digest.update(transparent_scripts_digest(tx))
-    digest.update(sapling_auth_digest(tx))
-    digest.update(orchard_auth_digest(tx))
-    digest.update(burn_amount_digest(tx))
-
-    return digest.digest()
-
-# NSM
-def burn_amount_digest(tx):
-    digest = blake2b(digest_size=32, person=b'ZTxBurnAmnt_Hash')
-
-    digest.update(struct.pack('<Q', tx.burnAmount))
-
-    return digest.digest()
-
-def txid_digest(tx):
-    digest = blake2b(
-        digest_size=32,
-        person=b'ZcashTxHash_' + struct.pack('<I', tx.nConsensusBranchId),
-    )
-
-    digest.update(header_digest(tx))
-    digest.update(transparent_digest(tx))
-    digest.update(sapling_digest(tx))
-    digest.update(orchard_digest(tx))
-    digest.update(burn_amount_digest(tx))
-
-    return digest.digest()
-
-def signature_digest(tx, t_inputs, nHashType, txin):
-    digest = blake2b(
-        digest_size=32,
-        person=b'ZcashTxHash_' + struct.pack('<I', tx.nConsensusBranchId),
-    )
-
-    digest.update(header_digest(tx))
-    digest.update(transparent_sig_digest(tx, t_inputs, nHashType, txin))
-    digest.update(sapling_digest(tx))
-    digest.update(orchard_digest(tx))
-    digest.update(burn_amount_digest(tx))
-
-    return digest.digest()
-
-def txin_sig_digest(tx, txin):
-    digest = blake2b(digest_size=32, person=b'Zcash___TxInHash')
-    if txin is not None:
-        digest.update(bytes(tx.vin[txin.nIn].prevout))
-        digest.update(struct.pack('<Q', txin.amount))
-        digest.update(bytes(txin.scriptPubKey))
-        digest.update(struct.pack('<I', tx.vin[txin.nIn].nSequence))
-    return digest.digest()
-
-
 def main():
     args = render_args()