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btc: grind for low-r value signatures to match core

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This commit is contained in:
tecnovert
2025-10-03 10:36:29 +02:00
parent 071675d359
commit a6c2251146
2 changed files with 16 additions and 1 deletions
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4
tests/basicswap/test_xmr.py
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@@ -1249,6 +1249,10 @@ class Test(BaseTest):
ci.signTx(b, lock_spend_tx, 0, lock_tx_script, amount),
lock_tx_script,
]
assert (
len(witness_stack[1]) <= 71
) # Test for low-r, sig size is <= 70 + sighash_type
assert len(witness_stack[2]) <= 71
lock_spend_tx = ci.setTxSignature(lock_spend_tx, witness_stack)
tx_decoded = ci.rpc("decoderawtransaction", [lock_spend_tx.hex()])
vsize_actual: int = tx_decoded["vsize"]