web3py ValueError: {'code': -32000, 'message': 'unknown account'}

Question

I want to send parameter to smart contract using transact method(web3py) but it wasn't working

Error code is below "ValueError: {'code': -32000, 'message': 'unknown account'}"

Owner address is same definitely (Owner address deployed by remix == web3py owner address(wal_address)) Has anyone experienced the same issue as me?

Here is my Solidity code

// SPDX-License-Identifier: MIT
pragma solidity ^0.8;

contract StakingRewards {
    IERC20 public immutable stakingToken;
    IERC20 public immutable rewardsToken;

    address public owner;

    uint public duration;
    uint public finishAt;
    uint public updatedAt;
    uint public rewardRate;
    uint public rewardPerTokenStored;
    uint public totalSupply;
    mapping(address => uint) public userRewardPerTokenPaid;
    mapping(address => uint) public rewards;
    mapping(address => uint) public balanceOf;

    constructor(address _stakingToken, address _rewardToken) {
        owner = msg.sender;
        stakingToken = IERC20(_stakingToken);
        rewardsToken = IERC20(_rewardToken);
    }

    modifier onlyOwner() {
        require(msg.sender == owner, "not authorized");
        _;
    }

    modifier updateReward(address _account) {
        rewardPerTokenStored = rewardPerToken();
        updatedAt = lastTimeRewardApplicable();

        if (_account != address(0)) {
            rewards[_account] = earned(_account);
            userRewardPerTokenPaid[_account] = rewardPerTokenStored;
        }
        _;
    }

    function lastTimeRewardApplicable() public view returns (uint) {
        return _min(finishAt, block.timestamp);
    }

    function rewardPerToken() public view returns (uint) {
        if (totalSupply == 0) {
            return rewardPerTokenStored;
        }
        return
            rewardPerTokenStored +
            (rewardRate * (lastTimeRewardApplicable() - updatedAt) * 1e18) /
            totalSupply;
    }

    function stake(uint _amount) external updateReward(msg.sender) {
        require(_amount > 0, "amount = 0");
        stakingToken.transferFrom(msg.sender, address(this), _amount);
        balanceOf[msg.sender] += _amount;
        totalSupply += _amount;
    }

    function withdraw(uint _amount) external updateReward(msg.sender) {
        require(_amount > 0, "amount = 0");
        balanceOf[msg.sender] -= _amount;
        totalSupply -= _amount;
        stakingToken.transfer(msg.sender, _amount);
    }

    function earned(address _account) public view returns (uint) {
        return
            ((balanceOf[_account] *
                (rewardPerToken() - userRewardPerTokenPaid[_account])) / 1e18) +
            rewards[_account];
    }

    function getReward() external updateReward(msg.sender) {
        uint reward = rewards[msg.sender];
        if (reward > 0) {
            rewards[msg.sender] = 0;
            rewardsToken.transfer(msg.sender, reward);
        }
    }

    function setRewardsDuration(uint _duration) external onlyOwner {
        require(finishAt < block.timestamp, "reward duration not finished");
        duration = _duration;
    }

    function notifyRewardAmount(uint _amount)
        external
        onlyOwner
        updateReward(address(0))
    {
        if (block.timestamp >= finishAt) {
            rewardRate = _amount / duration;
        } else {
            uint remainingRewards = (finishAt - block.timestamp) * rewardRate;
            rewardRate = (_amount + remainingRewards) / duration;
        }

        require(rewardRate > 0, "reward rate = 0");
        require(
            rewardRate * duration <= rewardsToken.balanceOf(address(this)),
            "reward amount > balance"
        );

        finishAt = block.timestamp + duration;
        updatedAt = block.timestamp;
    }

    function _min(uint x, uint y) private pure returns (uint) {
        return x <= y ? x : y;
    }
}

interface IERC20 {
    function totalSupply() external view returns (uint);
    function balanceOf(address account) external view returns (uint);
    function transfer(address recipient, uint amount) external returns (bool);
    function allowance(address owner, address spender) external view returns (uint);
    function approve(address spender, uint amount) external returns (bool);
    function transferFrom(
        address sender,
        address recipient,
        uint amount
    ) external returns (bool);
    event Transfer(address indexed from, address indexed to, uint value);
    event Approval(address indexed owner, address indexed spender, uint value);
}

Here is web3 py code

from web3 import Web3
import json
from web3.middleware import geth_poa_middleware

rpc_url = 'http://...................' ## Custom testnet
web3 = Web3(Web3.HTTPProvider(rpc_url))
web3.middleware_onion.inject(geth_poa_middleware, layer=0)  #  Inject poa middleware 


con_address = ".........................................."
wal_address = '..........................................'
                    # with open("/Users/creativelab/Desktop/Source/abi.json") as f:
                    #     info_json = json.load(f)
abi = [
    {
        "inputs": [],
        "name": "getReward",
        "outputs": [],
        "stateMutability": "nonpayable",
        "type": "function"
    },
    {
        "inputs": [
            {
                "internalType": "uint256",
                "name": "_amount",
                "type": "uint256"
            }
        ],
        "name": "notifyRewardAmount",
        "outputs": [],
        "stateMutability": "nonpayable",
        "type": "function"
    },
    {
        "inputs": [
            {
                "internalType": "uint256",
                "name": "_duration",
                "type": "uint256"
            }
        ],
        "name": "setRewardsDuration",
        "outputs": [],
        "stateMutability": "nonpayable",
        "type": "function"
    },
    {
        "inputs": [
            {
                "internalType": "uint256",
                "name": "_amount",
                "type": "uint256"
            }
        ],
        "name": "stake",
        "outputs": [],
        "stateMutability": "nonpayable",
        "type": "function"
    },
    {
        "inputs": [
            {
                "internalType": "address",
                "name": "_stakingToken",
                "type": "address"
            },
            {
                "internalType": "address",
                "name": "_rewardToken",
                "type": "address"
            }
        ],
        "stateMutability": "nonpayable",
        "type": "constructor"
    },
    {
        "inputs": [
            {
                "internalType": "uint256",
                "name": "_amount",
                "type": "uint256"
            }
        ],
        "name": "withdraw",
        "outputs": [],
        "stateMutability": "nonpayable",
        "type": "function"
    },
    {
        "inputs": [
            {
                "internalType": "address",
                "name": "",
                "type": "address"
            }
        ],
        "name": "balanceOf",
        "outputs": [
            {
                "internalType": "uint256",
                "name": "",
                "type": "uint256"
            }
        ],
        "stateMutability": "view",
        "type": "function"
    },
    {
        "inputs": [],
        "name": "duration",
        "outputs": [
            {
                "internalType": "uint256",
                "name": "",
                "type": "uint256"
            }
        ],
        "stateMutability": "view",
        "type": "function"
    },
    {
        "inputs": [
            {
                "internalType": "address",
                "name": "_account",
                "type": "address"
            }
        ],
        "name": "earned",
        "outputs": [
            {
                "internalType": "uint256",
                "name": "",
                "type": "uint256"
            }
        ],
        "stateMutability": "view",
        "type": "function"
    },
    {
        "inputs": [],
        "name": "finishAt",
        "outputs": [
            {
                "internalType": "uint256",
                "name": "",
                "type": "uint256"
            }
        ],
        "stateMutability": "view",
        "type": "function"
    },
    {
        "inputs": [],
        "name": "lastTimeRewardApplicable",
        "outputs": [
            {
                "internalType": "uint256",
                "name": "",
                "type": "uint256"
            }
        ],
        "stateMutability": "view",
        "type": "function"
    },
    {
        "inputs": [],
        "name": "owner",
        "outputs": [
            {
                "internalType": "address",
                "name": "",
                "type": "address"
            }
        ],
        "stateMutability": "view",
        "type": "function"
    },
    {
        "inputs": [],
        "name": "rewardPerToken",
        "outputs": [
            {
                "internalType": "uint256",
                "name": "",
                "type": "uint256"
            }
        ],
        "stateMutability": "view",
        "type": "function"
    },
    {
        "inputs": [],
        "name": "rewardPerTokenStored",
        "outputs": [
            {
                "internalType": "uint256",
                "name": "",
                "type": "uint256"
            }
        ],
        "stateMutability": "view",
        "type": "function"
    },
    {
        "inputs": [],
        "name": "rewardRate",
        "outputs": [
            {
                "internalType": "uint256",
                "name": "",
                "type": "uint256"
            }
        ],
        "stateMutability": "view",
        "type": "function"
    },
    {
        "inputs": [
            {
                "internalType": "address",
                "name": "",
                "type": "address"
            }
        ],
        "name": "rewards",
        "outputs": [
            {
                "internalType": "uint256",
                "name": "",
                "type": "uint256"
            }
        ],
        "stateMutability": "view",
        "type": "function"
    },
    {
        "inputs": [],
        "name": "rewardsToken",
        "outputs": [
            {
                "internalType": "contract IERC20",
                "name": "",
                "type": "address"
            }
        ],
        "stateMutability": "view",
        "type": "function"
    },
    {
        "inputs": [],
        "name": "stakingToken",
        "outputs": [
            {
                "internalType": "contract IERC20",
                "name": "",
                "type": "address"
            }
        ],
        "stateMutability": "view",
        "type": "function"
    },
    {
        "inputs": [],
        "name": "totalSupply",
        "outputs": [
            {
                "internalType": "uint256",
                "name": "",
                "type": "uint256"
            }
        ],
        "stateMutability": "view",
        "type": "function"
    },
    {
        "inputs": [],
        "name": "updatedAt",
        "outputs": [
            {
                "internalType": "uint256",
                "name": "",
                "type": "uint256"
            }
        ],
        "stateMutability": "view",
        "type": "function"
    },
    {
        "inputs": [
            {
                "internalType": "address",
                "name": "",
                "type": "address"
            }
        ],
        "name": "userRewardPerTokenPaid",
        "outputs": [
            {
                "internalType": "uint256",
                "name": "",
                "type": "uint256"
            }
        ],
        "stateMutability": "view",
        "type": "function"
    }
]


contract = web3.eth.contract(address=con_address, abi=abi)
TotalSupply = contract.functions.getReward().call() 

contract.functions.setRewardsDuration(1).transact({'from': wal_address})

Answer 1

You need to import your private key to web3.py application. Then use local signing middleware to sign the transactions.

Answer 2

i think the problem is not a account thing. i got same problem as you got before. to solve the problem you need to change function.

instead of using this code

contract.functions.setRewardsDuration(1).transact({'from': wal_address})

you have to use this kind of code

def functiontransaction(tx):

    signed_tx = w3.eth.account.signTransaction(tx, privatekey)
    
    tx_hash = w3.eth.sendRawTransaction(signed_tx.rawTransaction)
    
    return w3.eth.waitForTransactionReceipt(tx_hash)

tx = contract.functions.setRewardsDuration(1).buildTransaction(
            {
                "from" : wal_address,
            }
        )
tx_receipt = functiontransaction(tx)

it because you are using json-rpc protocol and web3, it doesnt support wallet inside protocol, but you are using sendTransaction function instead of sendRawTransaction so you have to use sendRawTransaction Difference between sendTransaction and sendRawTransaction in web3.py