encode_structured_data of ethsignTypedData error. TypeError: Value of `chainId` (137) in the struct `EIP712Domain` is of the type `<class 'str'>`, but expected uint256 value

[snarflakes]

What was wrong?

signature formation for other simpler ethsignTypedData sig requests (wallet queries) are working fine with the same code.

TypeError: Value of chainId (137) in the struct EIP712Domain is of the type <class 'str'>, but expected uint256 value

Code that produced the error

                            if "eth_signTypedData" == method:

                                parameters = parameters[1]
                                print(type(parameters))

parameters = parameters[2:]

                                print(parameters)
                                print("load json")
                                parameters = json.loads(parameters)
                                print(type(parameters))
                                print(parameters)
                                print(parameters['types']['EIP712Domain'])

                                print("eth_signTypedData")
                                message = messages.encode_structured_data(primitive=parameters)
                                print(message)
                                print(type(message))
                                signed_message = Account.sign_message(message, private_key=secretkey)
                                print(signed_message)

print(parameters[0])

                                result = signed_message.signature.hex()

                                print(result)
                                print(type(result))
                                wclient.reply(id_request, result)

CODE_TO_REPRODUCE 

Full error output

<---- Received WalletConnect wallet query : (1678237973673491, 'eth_signTypedData', ['0x827d3e01191de9206ce85197d1e1f2b91ed7251d', '{"types":{"SafeTx":[{"type":"address","name":"to"},{"type":"uint256","name":"value"},{"type":"bytes","name":"data"},{"type":"uint8","name":"operation"},{"type":"uint256","name":"safeTxGas"},{"type":"uint256","name":"baseGas"},{"type":"uint256","name":"gasPrice"},{"type":"address","name":"gasToken"},{"type":"address","name":"refundReceiver"},{"type":"uint256","name":"nonce"}],"EIP712Domain":[{"name":"chainId","type":"uint256"},{"name":"verifyingContract","type":"address"}]},"domain":{"chainId":"137","verifyingContract":"0x9135a7832db16190475f409b649771532bb6fa7f"},"primaryType":"SafeTx","message":{"to":"0x9135a7832db16190475f409b649771532bb6fa7f","value":"0","data":"0x694e80c30000000000000000000000000000000000000000000000000000000000000001","operation":"0","safeTxGas":"0","baseGas":"0","gasPrice":"0","gasToken":"0x0000000000000000000000000000000000000000","refundReceiver":"0x0000000000000000000000000000000000000000","nonce":"0"}}']) 1678237973673491 <class 'tuple'> <class 'int'> 1678237973673491 eth_signTypedData <class 'list'> ['0x827d3e01191de9206ce85197d1e1f2b91ed7251d', '{"types":{"SafeTx":[{"type":"address","name":"to"},{"type":"uint256","name":"value"},{"type":"bytes","name":"data"},{"type":"uint8","name":"operation"},{"type":"uint256","name":"safeTxGas"},{"type":"uint256","name":"baseGas"},{"type":"uint256","name":"gasPrice"},{"type":"address","name":"gasToken"},{"type":"address","name":"refundReceiver"},{"type":"uint256","name":"nonce"}],"EIP712Domain":[{"name":"chainId","type":"uint256"},{"name":"verifyingContract","type":"address"}]},"domain":{"chainId":"137","verifyingContract":"0x9135a7832db16190475f409b649771532bb6fa7f"},"primaryType":"SafeTx","message":{"to":"0x9135a7832db16190475f409b649771532bb6fa7f","value":"0","data":"0x694e80c30000000000000000000000000000000000000000000000000000000000000001","operation":"0","safeTxGas":"0","baseGas":"0","gasPrice":"0","gasToken":"0x0000000000000000000000000000000000000000","refundReceiver":"0x0000000000000000000000000000000000000000","nonce":"0"}}'] <class 'str'> {"types":{"SafeTx":[{"type":"address","name":"to"},{"type":"uint256","name":"value"},{"type":"bytes","name":"data"},{"type":"uint8","name":"operation"},{"type":"uint256","name":"safeTxGas"},{"type":"uint256","name":"baseGas"},{"type":"uint256","name":"gasPrice"},{"type":"address","name":"gasToken"},{"type":"address","name":"refundReceiver"},{"type":"uint256","name":"nonce"}],"EIP712Domain":[{"name":"chainId","type":"uint256"},{"name":"verifyingContract","type":"address"}]},"domain":{"chainId":"137","verifyingContract":"0x9135a7832db16190475f409b649771532bb6fa7f"},"primaryType":"SafeTx","message":{"to":"0x9135a7832db16190475f409b649771532bb6fa7f","value":"0","data":"0x694e80c30000000000000000000000000000000000000000000000000000000000000001","operation":"0","safeTxGas":"0","baseGas":"0","gasPrice":"0","gasToken":"0x0000000000000000000000000000000000000000","refundReceiver":"0x0000000000000000000000000000000000000000","nonce":"0"}} load json <class 'dict'> {'types': {'SafeTx': [{'type': 'address', 'name': 'to'}, {'type': 'uint256', 'name': 'value'}, {'type': 'bytes', 'name': 'data'}, {'type': 'uint8', 'name': 'operation'}, {'type': 'uint256', 'name': 'safeTxGas'}, {'type': 'uint256', 'name': 'baseGas'}, {'type': 'uint256', 'name': 'gasPrice'}, {'type': 'address', 'name': 'gasToken'}, {'type': 'address', 'name': 'refundReceiver'}, {'type': 'uint256', 'name': 'nonce'}], 'EIP712Domain': [{'name': 'chainId', 'type': 'uint256'}, {'name': 'verifyingContract', 'type': 'address'}]}, 'domain': {'chainId': '137', 'verifyingContract': '0x9135a7832db16190475f409b649771532bb6fa7f'}, 'primaryType': 'SafeTx', 'message': {'to': '0x9135a7832db16190475f409b649771532bb6fa7f', 'value': '0', 'data': '0x694e80c30000000000000000000000000000000000000000000000000000000000000001', 'operation': '0', 'safeTxGas': '0', 'baseGas': '0', 'gasPrice': '0', 'gasToken': '0x0000000000000000000000000000000000000000', 'refundReceiver': '0x0000000000000000000000000000000000000000', 'nonce': '0'}} [{'name': 'chainId', 'type': 'uint256'}, {'name': 'verifyingContract', 'type': 'address'}] eth_signTypedData Traceback (most recent call last): File "imageidopen.py", line 1008, in qr_capture message = messages.encode_structured_data(primitive=parameters) File "/usr/local/lib/python3.7/dist-packages/eth_account/messages.py", line 152, in encode_structured_data hash_domain(structured_data), File "/usr/local/lib/python3.7/dist-packages/eth_account/_utils/structured_data/hashing.py", line 284, in hash_domain structured_data["domain"] File "/usr/local/lib/python3.7/dist-packages/eth_account/_utils/structured_data/hashing.py", line 267, in encode_data data_types_and_hashes = _encode_data(primaryType, types, data) File "/home/pi/.local/lib/python3.7/site-packages/eth_utils/functional.py", line 45, in inner return callback(fn(*args, **kwargs)) File "/usr/local/lib/python3.7/dist-packages/eth_account/_utils/structured_data/hashing.py", line 261, in _encode_data field["type"], TypeError: Value of chainId (137) in the struct EIP712Domain is of the type <class 'str'>, but expected uint256 value

During handling of the above exception, another exception occurred:

Traceback (most recent call last): File "/usr/local/lib/python3.7/dist-packages/gpiozero/pins/rpigpio.py", line 223, in _call_when_changed super(RPiGPIOPin, self)._call_when_changed() File "/usr/local/lib/python3.7/dist-packages/gpiozero/pins/local.py", line 130, in _call_when_changed self.state if state is None else state) File "/usr/local/lib/python3.7/dist-packages/gpiozero/pins/pi.py", line 298, in _call_when_changed method(ticks, state) File "/usr/local/lib/python3.7/dist-packages/gpiozero/input_devices.py", line 182, in _pin_changed self._fire_events(ticks, bool(self._state_to_value(state))) File "/usr/local/lib/python3.7/dist-packages/gpiozero/mixins.py", line 401, in _fire_events self._fire_activated() File "/usr/local/lib/python3.7/dist-packages/gpiozero/mixins.py", line 447, in _fire_activated super(HoldMixin, self)._fire_activated() File "/usr/local/lib/python3.7/dist-packages/gpiozero/mixins.py", line 364, in _fire_activated self.when_activated() File "imageidopen.py", line 317, in push_button2 qr_capture() File "imageidopen.py", line 1075, in qr_capture except pywalletconnect.client.WCClientException: NameError: name 'pywalletconnect' is not defined

ERROR_HERE 

Expected Result

valid signature

(valid signature is created with this walletconnect query eth_signedTypeData using same code)

{'types': {'Alias': [{'name': 'from', 'type': 'address'}, {'name': 'alias', 'type': 'address'}], 'EIP712Domain': [{'name': 'name', 'type': 'string'}, {'name': 'version', 'type': 'string'}]}, 'domain': {'name': 'snapshot', 'version': '0.1.4'}, 'primaryType': 'Alias', 'message': {'from': '0x827d3e01191de9206ce85197d1e1f2b91ed7251d', 'alias': '0xea6f8c18d8dee98346eb1328f30c6406d28dee7a'}} [{'name': 'name', 'type': 'string'}, {'name': 'version', 'type': 'string'}]

EXPECTED_RESULT

Environment

version 0.5.9

# run this:
$ python -m eth_utils

# then copy the output here:
OUTPUT_HERE

How can it be fixed?

some encoding error?

[fselmo]

This is the error

TypeError: Value of chainId (137) in the struct EIP712Domain is of the type <class 'str'>, but expected uint256 value

It is expecting a python int for the chainid.

[fselmo]

I closed this for now as it doesn't seem to be an issue with the expected behavior. If I missed something or there's a particular feature request (a request to modify the expected behavior) in here somewhere please feel free to clarify / start a conversation on that instead. Best of luck!

[snarflakes]

Thanks for the help! I got rid of that one, and a new one popped up (below) for another piece of that same dictionary. Am I missing a strategy of building most of these dapp delivered ethsignedTypedData signatures request easily? Or do I have to manually correct each of these fields for the signature to be successfully encoded for the dapp to accept? The one I've been working with here is a gnosis Safe signature, perhaps these are more complicated sigs.

new error TypeError: Value of value (0) is not encodable as type uint256. If the base type is correct, verify that the value does not exceed the specified size for the type.

[snarflakes]

actually I think this PR is solving my exact issues with ethsignedtypeddata signatures!!!

"add TypedDataConvert to message #221"