def _verify_input(self, input_index, sub_script, partial_multisig=False):
p2sh = sub_script.is_p2sh()
sig_script = self.inputs[input_index].script
si = ScriptInterpreter(txn=self,
input_index=input_index,
sub_script=sub_script)
try:
si.run_script(sig_script)
except ScriptInterpreterError:
return False
# This copy_stack and the restore_stack emulate the behavior
# found in bitcoin core for evaluating P2SH scripts. See:
# https://github.com/bitcoin/bitcoin/blob/master/src/script/interpreter.cpp#L1170
if p2sh:
si.copy_stack()
try:
si.run_script(sub_script)
except ScriptInterpreterError:
return False
rv = si.valid
if p2sh:
si.restore_stack()
redeem_script = Script(si.stack.pop())
si._sub_script = redeem_script
try:
if sig_script.is_multisig_sig() and partial_multisig:
# This is a hack for partial verification
partial_script = copy.deepcopy(redeem_script)
partial_script.ast[-1] = 'OP_CHECKPARTIALMULTISIG'
sig_info = sig_script.extract_multisig_sig_info()
si.run_script(partial_script)
rv &= si.match_count > 0 and si.match_count <= len(sig_info['signatures'])
else:
si.run_script(redeem_script)
rv &= si.valid
except:
rv = False
return rv
def _verify_input(self, input_index, sub_script, partial_multisig=False):
p2sh = sub_script.is_p2sh()
sig_script = self.inputs[input_index].script
si = ScriptInterpreter(txn=self,
input_index=input_index,
sub_script=sub_script)
try:
si.run_script(sig_script)
except ScriptInterpreterError:
return False
# This copy_stack and the restore_stack emulate the behavior
# found in bitcoin core for evaluating P2SH scripts. See:
# https://github.com/bitcoin/bitcoin/blob/master/src/script/interpreter.cpp#L1170
if p2sh:
si.copy_stack()
try:
si.run_script(sub_script)
except ScriptInterpreterError:
return False
rv = si.valid
if p2sh:
si.restore_stack()
redeem_script = Script(si.stack.pop())
si._sub_script = redeem_script
try:
if sig_script.is_multisig_sig() and partial_multisig:
# This is a hack for partial verification
partial_script = copy.deepcopy(redeem_script)
partial_script.ast[-1] = 'OP_CHECKPARTIALMULTISIG'
sig_info = sig_script.extract_multisig_sig_info()
si.run_script(partial_script)
rv &= si.match_count > 0 and si.match_count <= len(sig_info['signatures'])
else:
si.run_script(redeem_script)
rv &= si.valid
except:
rv = False
return rv
