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Update evaluate method in script.py to be able to handle opcodes 177 … #172

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Update evaluate method in script.py to be able to handle opcodes 177 … #172

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12 changes: 11 additions & 1 deletion code-ch13/script.py
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Original file line number Diff line number Diff line change
Expand Up @@ -153,7 +153,7 @@ def serialize(self):
# encode_varint the total length of the result and prepend
return encode_varint(total) + result

def evaluate(self, z, witness):
def evaluate(self, z, witness, version=None, locktime=None, sequence=None):
# create a copy as we may need to add to this list if we have a
# RedeemScript
cmds = self.cmds[:]
Expand All @@ -180,6 +180,16 @@ def evaluate(self, z, witness):
if not operation(stack, z):
LOGGER.info('bad op: {}'.format(OP_CODE_NAMES[cmd]))
return False
elif cmd == 177:
# 177 is OP_CHECKLOCKTIMEVERIFY. Operation requires locktime and sequence.
if not operation(stack, locktime, sequence):
LOGGER.info(f"bad op: {OP_CODE_NAMES[cmd]}")
return False
elif cmd == 178:
# 178 is OP_CHECKSEQUENCEVERIFY. Operation requires sequence and version.
if not operation(stack, version, sequence):
LOGGER.info(f"bad op: {OP_CODE_NAMES[cmd]}")
return False
else:
if not operation(stack):
LOGGER.info('bad op: {}'.format(OP_CODE_NAMES[cmd]))
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