Contract.functions "not found" in Web3.py

Question

Testing this python code on UBUNTU :

import requests
import json
from eth_account import Account
from web3 import Web3, HTTPProvider
 
caller = "0xb9****f832860DBD"
private_key = "1d7bb4b13a48b54********5336726f"
 
url = 'https://sepolia.infura.io/v3/8afa5e30c******14b5d'
 
w3 = Web3(HTTPProvider(url))
#nonce = w3.eth.getTransactionCount(caller)
 
abi= '[{"constant": false,"inputs": [{"***************************": [{"name": "","type": "bool"}],"payable": false,"stateMutability": "view","type": "function"},{"constant": true,"inputs": [],"name": "Owner","outputs": [{"name": "","type": "address"}],"payable": false,"stateMutability": "view","type": "function"}]'
  
nonce=w3.eth.get_transaction_count(caller)
chainId = w3.eth.chain_id
 
contract_address = "0x*******9B78"
 
contract = w3.eth.contract(address=contract_address, abi=abi)

result = contract.functions.CheckMoneyOnTheContract({"chainId": chainId, "from": caller, "nonce": nonce })

 

When I try to continue my editor doesn'found contract.functions .....

Trace expl 1

web3.exceptions.Web3ValidationError: Could not identify the intended function with name CheckMoneyOnTheContract, positional arguments with type(s) dict and keyword arguments with type(s) {}. Found 1 function(s) with the name CheckMoneyOnTheContract: ['CheckMoneyOnTheContract()'] Function invocation failed due to improper number of arguments. has context menu

(For me the abi is correct)

Trace expl 2

Web3 version: Traceback (most recent call last): File "/home/**************epolia.py", line 7, in print(Web3.version) AttributeError: type object 'Web3' has no attribute 'version'

ABI portion:

{ "constant": true, "inputs": [], "name": "CheckMoneyOnTheContract", "outputs": [ { "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" }

Can somebody tell me my ??

Answer 1

I managed to fix the problem. The issue came mainly from the fact that the required number of arguments were not send to the smart contract function.

My editor still doesn't found contract.functions .... but is not an issue, it works.

Still doesn't know how to print the Web3 library version ....

Below is an example of a working example using one smart contract function with one string parameter.

param_value = "TestHash"  

transaction = {
    'to': contract_address,
    'from': caller,
    'gas': 200000, 
    'gasPrice': w3.to_wei('50', 'gwei'),  
    'nonce': w3.eth.get_transaction_count(caller), 
    'data': contract.encodeABI(fn_name='setHash', args=[param_value]),  
}
 
signed_txn = w3.eth.account.sign_transaction(transaction, private_key)
 
tx_hash = w3.eth.send_raw_transaction(signed_txn.rawTransaction)
 
w3.eth.wait_for_transaction_receipt(tx_hash)