def getTransactionError(self, txhash):
if not txhash.startswith('0x'):
txhash = '0x' + txhash
trace = self.web3.manager.request_blocking('debug_traceTransaction', [
txhash, {
'disableStorage': True,
'disableMemory': True,
'disableStack': True,
}
])
if not trace.get('failed'):
logger.error(
'Transaction receipt indicates failure but trace succeeded')
return 'Transaction receipt indicates failure but trace succeeded'
# Parse out the revert error code if it exists
# See https://solidity.readthedocs.io/en/v0.4.24/control-structures.html#error-handling-assert-require-revert-and-exceptions # noqa: E501
# Encode as if a function call to `Error(string)`
rv = HexBytes(trace.get('returnValue'))
# Trim off function selector for "Error"
if not rv.startswith(HexBytes(Debug.ERROR_SELECTOR)):
logger.error(
'Expected revert encoding to begin with %s, actual is %s',
Debug.ERROR_SELECTOR, rv[:4].hex())
return 'Invalid revert encoding'
rv = rv[4:]
error = decode_abi(['string'], rv)[0]
return error.decode('utf-8')
def to_string(value):
'''Convert a value to a string'''
if type(value) in (bytes, HexBytes):
value = HexBytes(value).hex()
value = str(value)
if value.startswith("0x") and eth_utils.is_hex(value):
try:
return eth_utils.to_text(hexstr=value)
except UnicodeDecodeError as e:
raise ValueError(e)
return value
def get_clean_address_or_throw(address):
"""Get a clean 42 character address with leading '0x' throw
Keyword argument:
address: hex-like address
"""
if not isinstance(address, str):
address = HexBytes(address).rjust(10, b"\0").hex()
if not RE_ADDRESS.match(address.lower()):
raise TypeError("address looks invalid: '{}'".format(address))
if not address.startswith("0x"):
address = "0x" + address
return address
