Invalid Field in signTransaction while trying to deploy a contract

[robinportigliatti]

• Version: 5.24.0
• Python: 3.9.7
• OS: Docker (from python)
• pip freeze output

aiohttp==3.7.4.post0
aiosignal==1.2.0
asgiref==3.4.1
asttokens==2.0.4
async-timeout==3.0.1
attrs==21.2.0
backports.entry-points-selectable==1.1.1
base58==2.1.0
bitarray==1.2.2
bitly-api-py3==0.3
black==21.9b0
certifi==2021.10.8
cffi==1.15.0
cfgv==3.3.1
chardet==4.0.0
charset-normalizer==2.0.7
click==8.0.3
cryptography==35.0.0
cytoolz==0.11.0
dataclassy==0.11.1
distlib==0.3.3
dj-database-url==0.5.0
Django==3.2.9
django-cors-headers==3.10.0
django-crispy-forms==1.13.0
django-debug-toolbar==3.2.2
django-dirtyfields==1.7.0
django-docutils==0.5.1
django-extensions==2.2.9
django-heroku==0.3.1
django-mirage-field==1.2.2
django-qr-code==2.3.0
django-randomslugfield==0.3.0
django-slugify-processor==0.11.0
djangorestframework==3.12.4
docutils==0.18
eip712==0.1.0
eth-abi==2.1.1
eth-account==0.5.6
eth-brownie==1.17.1
eth-event==1.2.3
eth-hash==0.3.2
eth-keyfile==0.5.1
eth-keys==0.3.3
eth-rlp==0.2.1
eth-typing==2.2.2
eth-utils==1.10.0
execnet==1.9.0
filelock==3.4.0
frozenlist==1.2.0
gunicorn==20.1.0
hexbytes==0.2.2
hypothesis==6.24.0
identify==2.4.0
idna==3.3
inflection==0.5.0
iniconfig==1.1.1
ipfshttpclient==0.8.0a2
jsonschema==3.2.0
lazy-object-proxy==1.6.0
lru-dict==1.1.7
lxml==4.6.4
multiaddr==0.0.9
multidict==5.2.0
mypy-extensions==0.4.3
mythx-models==1.9.1
netaddr==0.8.0
nodeenv==1.6.0
packaging==21.0
parsimonious==0.8.1
pathspec==0.9.0
Pillow==8.4.0
platformdirs==2.4.0
pluggy==1.0.0
pre-commit==2.15.0
prompt-toolkit==3.0.21
protobuf==3.19.0
psutil==5.8.0
psycopg2==2.9.2
psycopg2-binary==2.9.2
py==1.10.0
py-solc-ast==1.2.9
py-solc-x==1.1.1
pycparser==2.21
pycryptodome==3.11.0
Pygments==2.10.0
pygments-lexer-solidity==0.7.0
PyJWT==1.7.1
pyparsing==3.0.3
pyrsistent==0.18.0
pytest==6.2.5
pytest-forked==1.3.0
pytest-xdist==1.34.0
python-dateutil==2.8.1
python-dotenv==0.16.0
pythx==1.6.1
pytz==2021.3
PyYAML==5.4.1
regex==2021.10.23
requests==2.26.0
rlp==2.0.1
segno==1.4.0
semantic-version==2.8.5
six==1.16.0
sortedcontainers==2.4.0
sqlparse==0.4.2
toml==0.10.2
tomli==1.2.2
toolz==0.11.1
tqdm==4.62.3
typing-extensions==3.10.0.2
urllib3==1.26.7
varint==1.0.2
virtualenv==20.10.0
vvm==0.1.0
vyper==0.3.0
wcwidth==0.2.5
web3==5.24.0
websockets==9.1
whitenoise==5.3.0
wrapt==1.13.2
yarl==1.7.0

What was wrong?

Hello,

Juste made my first NFT today as a POC :D. But my application is in python (Django) and the migration and mint process are in NodeJs... So I tried your solution but I found some difficulty by deploying my first contract.

When I run the following code I get the following error : Transaction had invalid fields: {'gas': '3000000', 'gasPrice': '70000000000'} But when I remove the invalid fields I get these error : Transaction must include these fields: {'gasPrice', 'gas'}

Do you think it is due to the fact I used arbitrary value ?

Robin,

• The code which produced the error

  from solcx import compile_source
  from web3 import Account, Web3, HTTPProvider
  
  compiled_sol = compile_source(
    collection.get_erc721_contract,
    output_values=["abi", "bin-runtime"],
  )
  contract_id, contract_interface = compiled_sol.popitem()
  project_id = ""
  private_key = ""
  w3 = Web3(HTTPProvider("https://rinkeby.infura.io/v3/{project_id}".format(project_id=project_id)))
  acct = Account.from_key(private_key)
  contract = w3.eth.contract(abi=contract_interface['abi'], bytecode=contract_interface['bin-runtime'])
  print(acct.address)
  data = contract._encode_constructor_data()
  count = w3.eth.getTransactionCount(acct.address)
  transaction = {
    'data': data,
    'gas': '3000000',
    'gasPrice': '70000000000',
    'nonce': count
  }
  signed = acct.signTransaction(transaction)
  acct.sendRawTransaction(signed.rawTransaction)

• The full output of the error

  Internal Server Error: /fr/collection/74fa66c4-8b33-4966-a15a-8890230194de/generate
  Traceback (most recent call last):
  File "/usr/local/lib/python3.9/site-packages/django/core/handlers/exception.py", line 47, in inner
  response = get_response(request)
  File "/usr/local/lib/python3.9/site-packages/django/core/handlers/base.py", line 181, in _get_response
  response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/usr/local/lib/python3.9/site-packages/django/views/generic/base.py", line 70, in view
  return self.dispatch(request, *args, **kwargs)
  File "/app/generator/views/collection.py", line 42, in dispatch
  generate(self.collection)
  File "/app/generator/utils/collection.py", line 53, in generate
  signed = acct.signTransaction(transaction)
  File "/usr/local/lib/python3.9/site-packages/eth_account/signers/local.py", line 96, in signTransaction
  return self.sign_transaction(transaction_dict)
  File "/usr/local/lib/python3.9/site-packages/eth_account/signers/local.py", line 99, in sign_transaction
  return self._publicapi.sign_transaction(transaction_dict, self.key)
  File "/usr/local/lib/python3.9/site-packages/eth_utils/decorators.py", line 20, in _wrapper
  return self.method(objtype, *args, **kwargs)
  File "/usr/local/lib/python3.9/site-packages/eth_account/account.py", line 747, in sign_transaction
  ) = sign_transaction_dict(account._key_obj, sanitized_transaction)
  File "/usr/local/lib/python3.9/site-packages/eth_account/_utils/signing.py", line 32, in sign_transaction_dict
  unsigned_transaction = serializable_unsigned_transaction_from_dict(transaction_dict)
  File "/usr/local/lib/python3.9/site-packages/eth_account/_utils/legacy_transactions.py", line 44, in serializable_unsigned_transaction_from_dict
  assert_valid_fields(transaction_dict)
  File "/usr/local/lib/python3.9/site-packages/eth_account/_utils/legacy_transactions.py", line 109, in assert_valid_fields
  raise TypeError("Transaction had invalid fields: %r" % invalid)
  TypeError: Transaction had invalid fields: {'gas': '3000000', 'gasPrice': '70000000000'}
  [26/Nov/2021 15:08:05] "GET /fr/collection/74fa66c4-8b33-4966-a15a-8890230194de/generate HTTP/1.1" 500 150383

• What type of node you were connecting to. https://rinkeby.infura.io/v3/{project_id}

[fselmo]

@robinportigliatti Thanks for reaching out. I think I can help you debug here. It looks like in this case the message isn't entirely clear. It is the value of your fields that are problematic, not the fields themselves. You are passing them in as string but they need to be int.

Give it a shot with int values instead:

transaction = {
      'data': data,
      'gas': 3000000,
      'gasPrice': 70000000000,
      'nonce': count
  }

I believe this is the error here. I'm going to close this but feel free to re-open if that did not resolve your issue. I'd encourage you to join the discord if you have any usage questions or anything else. We have a great supportive community over there happy to answer and ask questions as things pop up. Good luck!

[robinportigliatti]

@fselmo thank you, it worked, now I have to find why my contract creation is in error

I will join the discord, it might be better you are right