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Signature form correct for non-std SIGHASH values #123

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Signature form correct for non-std SIGHASH values #123

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2 changes: 1 addition & 1 deletion bitcoin/transaction.py
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Original file line number Diff line number Diff line change
Expand Up @@ -197,7 +197,7 @@ def is_bip66(sig):
def txhash(tx, hashcode=None):
if isinstance(tx, str) and re.match('^[0-9a-fA-F]*$', tx):
tx = changebase(tx, 16, 256)
if hashcode:
if hashcode is not None:
return dbl_sha256(from_string_to_bytes(tx) + encode(int(hashcode), 256, 4)[::-1])
else:
return safe_hexlify(bin_dbl_sha256(tx)[::-1])
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