Infura not working on Contract Contructor() include eth.send_raw_transaction suggestion?

[Gresliebear]

• Version: x.x.x
• Python: 3.9
• OS: Windows 10
• pip freeze output

[2021-09-18 23:10:53,398] ERROR in app: Exception on / [GET]
Traceback (most recent call last):
  File "e:\openvesselfin\jubilant-market\pythonserver\vessel_env\lib\site-packages\flask\app.py", line 2070, in wsgi_app
    response = self.full_dispatch_request()
  File "e:\openvesselfin\jubilant-market\pythonserver\vessel_env\lib\site-packages\flask\app.py", line 1515, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "e:\openvesselfin\jubilant-market\pythonserver\vessel_env\lib\site-packages\flask\app.py", line 1513, in full_dispatch_request
    rv = self.dispatch_request()
  File "e:\openvesselfin\jubilant-market\pythonserver\vessel_env\lib\site-packages\flask\app.py", line 1499, in dispatch_request
    return self.ensure_sync(self.view_functions[rule.endpoint])(**req.view_args)
  File "E:\OpenVesselFin\jubilant-market\PythonServer\wsgi.py", line 92, in index
    tx_hash = Greeter.constructor().transact()
  File "e:\openvesselfin\jubilant-market\pythonserver\vessel_env\lib\site-packages\eth_utils\decorators.py", line 18, in _wrapper
    return self.method(obj, *args, **kwargs)
  File "e:\openvesselfin\jubilant-market\pythonserver\vessel_env\lib\site-packages\web3\contract.py", line 663, in transact
    return self.web3.eth.send_transaction(transact_transaction)
  File "e:\openvesselfin\jubilant-market\pythonserver\vessel_env\lib\site-packages\web3\eth.py", line 686, in send_transaction
    return self._send_transaction(transaction)
  File "e:\openvesselfin\jubilant-market\pythonserver\vessel_env\lib\site-packages\web3\module.py", line 57, in caller
    result = w3.manager.request_blocking(method_str,
  File "e:\openvesselfin\jubilant-market\pythonserver\vessel_env\lib\site-packages\web3\manager.py", line 187, in request_blocking
    return self.formatted_response(response,
  File "e:\openvesselfin\jubilant-market\pythonserver\vessel_env\lib\site-packages\web3\manager.py", line 168, in formatted_response
    raise ValueError(response["error"])
ValueError: {'code': -32601, 'message': 'The method eth_sendTransaction does not exist/is not available'}```

What was wrong?

I am calling the infura API and would like to use the Contract.constructor().transact() but it uses eth.send_transaction(transact_transaction) which for infurai doesn't work instead I have to use Eth,send_raw_transaction(raw_transaction). I am going to change to local host solution but I don't know how to implement a pull request for including eth.send_raw_transaction to the constructor() decorator

How can it be fixed?

Fill this section in if you know how this could or should be fixed.

I think including the if statement passes the key to check if was signed, or just past the transaction object after it has been signed. or write a new function to check that transaction has been signed or not. I don't know the code base well enough to implement this. However I need to move on in a hackathon so I have to figure out local host. because the only reason I am using Contract Contructor is to access Solidity code through python.

I know you have no reason to follow through on this but I think this will be essential for multi-key signs so know not depending on a single person to local host or sign transactions off

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[CaixiangFan]

I found this also happens to Besu when trying to send a transaction through deployed smart contract. In my case, the following value error happened when calling the contract.functions.set(1).transact() function in SimpleStorage.

ValueError: {'code': -32604, 'message': 'The method eth_sendTransaction is not supported. Use eth_sendRawTransaction to send a signed transaction to Besu.'}

Besu: 21.10
web3: 5.23.0

[kclowes]

This isn't a bug, but the docs could be clearer so I'll leave this open. See here for an example of how to build the transaction, sign it, and then send it using sendRawTransaction using a node that doesn't handle your private key.

[Gresliebear]

I have read that in the docs but the reason I brought this up is that I enjoy the contract functionality where sol compile translate solidity code into python Object calls but this is not possible with Infura and besu API. I have proceeded to set up Geth but its failed to sync and errors.

Mabye I am using it wrong

[B3nac]

So the main action item here is to clear up the documentation about using eth.send_transaction and how Infura and Besu are not compatible with this call? I believe only local nodes would be compatible with this function call.

[kclowes]

So the main action item here is to clear up the documentation about using eth.send_transaction and how Infura and Besu are not compatible with this call?

It's been so long that I'm not sure what I was thinking initially, but it would be nice to find a place to highlight that you can add the construct_sign_and_send_raw_middleware. Maybe in the troubleshooting section? Docs for the middleware are here. I haven't looked at Besu at all, but I believe that middleware should work on Infura at least.

[B3nac]

So the main action item here is to clear up the documentation about using eth.send_transaction and how Infura and Besu are not compatible with this call?

It's been so long that I'm not sure what I was thinking initially, but it would be nice to find a place to highlight that you can add the construct_sign_and_send_raw_middleware. Maybe in the troubleshooting section? Docs for the middleware are here. I haven't looked at Besu at all, but I believe that middleware should work on Infura at least.

Thanks for the additional context! I have an idea, I'll send in a pull request for review.

[B3nac]

Hi @kclowes I added an example. Let me know if I should change the wording or anything. In the snippet I used os.environ.get() because importing the data from an environment variable is generally more secure than hard coding the private key. The example has been tested and works like a charm. Cheers!

[kclowes]

Closed via #2410. Thanks @B3nac!