def VerifyScripts(verifiable):
"""
Verify the scripts of the provided `verifiable` object.
Args:
verifiable (neo.IO.Mixins.VerifiableMixin):
Returns:
bool: True if verification is successful. False otherwise.
"""
try:
hashes = verifiable.GetScriptHashesForVerifying()
except Exception as e:
logger.debug("couldn't get script hashes %s " % e)
return False
if len(hashes) != len(verifiable.Scripts):
return False
blockchain = GetBlockchain()
for i in range(0, len(hashes)):
verification = verifiable.Scripts[i].VerificationScript
if len(verification) == 0:
sb = ScriptBuilder()
sb.EmitAppCall(hashes[i].Data)
verification = sb.ms.getvalue()
else:
verification_hash = Crypto.ToScriptHash(verification,
unhex=False)
if hashes[i] != verification_hash:
return False
state_reader = GetStateReader()
script_table = CachedScriptTable(
DBCollection(blockchain._db, DBPrefix.ST_Contract,
ContractState))
engine = ApplicationEngine(TriggerType.Verification,
verifiable, script_table, state_reader,
Fixed8.Zero())
engine.LoadScript(verification)
invocation = verifiable.Scripts[i].InvocationScript
engine.LoadScript(invocation)
try:
success = engine.Execute()
state_reader.ExecutionCompleted(engine, success)
except Exception as e:
state_reader.ExecutionCompleted(engine, False, e)
if engine.ResultStack.Count != 1 or not engine.ResultStack.Pop(
).GetBoolean():
Helper.EmitServiceEvents(state_reader)
return False
Helper.EmitServiceEvents(state_reader)
return True
def VerifyScripts(verifiable):
try:
hashes = verifiable.GetScriptHashesForVerifying()
except Exception as e:
logger.error("couldn't get script hashes %s " % e)
return False
if len(hashes) != len(verifiable.Scripts):
return False
state_reader = GetStateReader()
blockchain = GetBlockchain()
for i in range(0, len(hashes)):
verification = verifiable.Scripts[i].VerificationScript
if len(verification) == 0:
# logger.info("VERIFICATION IS 0, EMITTING APP CALL")
sb = ScriptBuilder()
sb.EmitAppCall(hashes[i].Data)
verification = sb.ToArray()
else:
verification_hash = Crypto.ToScriptHash(verification,
unhex=False)
if hashes[i] != verification_hash:
return False
engine = ApplicationEngine(TriggerType.Verification, verifiable,
blockchain, state_reader, Fixed8.Zero())
engine.LoadScript(verification, False)
invoction = verifiable.Scripts[i].InvocationScript
engine.LoadScript(invoction, True)
try:
success = engine.Execute()
state_reader.ExecutionCompleted(engine, success)
except Exception as e:
state_reader.ExecutionCompleted(engine, False, e)
# pdb.set_trace()
if engine.EvaluationStack.Count != 1 or not engine.EvaluationStack.Pop(
).GetBoolean():
return False
return True