ethereum / web3.py

A python interface for interacting with the Ethereum blockchain and ecosystem.
http://web3py.readthedocs.io
MIT License
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processReceipt() returns "Tried to read 96 bytes. Only got 68 bytes" #1441

Open natonamco opened 4 years ago

natonamco commented 4 years ago

### What was wrong?

I am trying to obtain event logs of the MakerDAO Tub Contract (Contract 1 etherscan) using getTransactionReceipt() and processReceipt(). The problem seems to be in LogNote() events, because all the other events work. Here is the code: 

Tub_Contract = Web3.toChecksumAddress('0x448a5065aeBB8E423F0896E6c5D525C040f59af3') ABI_TubContract = 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contract = w3.eth.contract(Tub_Contract , abi= ABI_Tub_Contract) tx_receipt = w3.eth.getTransactionReceipt('0x32f9c2d22ef47cd589a21514ae83aa3c03372e57e8d6a4b4236f9a292c46434c') event_logs = contract.events.LogNote().processReceipt(tx_receipt) print(event_logs)


The output is the following: 

File "CDP_events.py", line 9, in event_logs = contract.events.LogNote().processReceipt(tx_receipt) File "/anaconda3/lib/python3.7/site-packages/web3/utils/decorators.py", line 14, in _wrapper return self.method(obj, *args, kwargs) File "/anaconda3/lib/python3.7/site-packages/web3/contract.py", line 1279, in processReceipt return self._parse_logs(txn_receipt) File "/anaconda3/lib/python3.7/site-packages/eth_utils/functional.py", line 45, in inner return callback(fn(*args, *kwargs)) File "/anaconda3/lib/python3.7/site-packages/web3/contract.py", line 1285, in _parse_logs decoded_log = get_event_data(self.abi, log) File "/anaconda3/lib/python3.7/site-packages/web3/utils/events.py", line 188, in get_event_data decoded_log_data = decode_abi(log_data_types, log_data) File "/anaconda3/lib/python3.7/site-packages/eth_abi/abi.py", line 96, in decode_abi return decoder(stream) File "/anaconda3/lib/python3.7/site-packages/eth_abi/decoding.py", line 118, in call return self.decode(stream) File "/anaconda3/lib/python3.7/site-packages/eth_utils/functional.py", line 45, in inner return callback(fn(args, kwargs)) File "/anaconda3/lib/python3.7/site-packages/eth_abi/decoding.py", line 164, in decode yield decoder(stream) File "/anaconda3/lib/python3.7/site-packages/eth_abi/decoding.py", line 118, in call return self.decode(stream) File "/anaconda3/lib/python3.7/site-packages/eth_abi/decoding.py", line 136, in decode value = self.tail_decoder(stream) File "/anaconda3/lib/python3.7/site-packages/eth_abi/decoding.py", line 118, in call return self.decode(stream) File "/anaconda3/lib/python3.7/site-packages/eth_abi/decoding.py", line 186, in decode raw_data = self.read_data_from_stream(stream) File "/anaconda3/lib/python3.7/site-packages/eth_abi/decoding.py", line 589, in read_data_from_stream len(data), eth_abi.exceptions.InsufficientDataBytes: Tried to read 96 bytes. Only got 68 bytes

kclowes commented 4 years ago

Hmm, I think this is a bug. Assuming you have the error flag set as the default WARN option, InsufficientDataBytes should get caught with the other errors. Thanks for the report!