Comments on: Smart Contracts in Python: Complete Guide

By: Syed Umar Bukhari

Syed Umar Bukhari — Sat, 18 Jun 2022 22:45:22 +0000

In reply to Hamid. I am glad to hear that.

By: Syed Umar Bukhari

Syed Umar Bukhari — Sat, 18 Jun 2022 22:45:00 +0000

In reply to Hamid. In that case if it still didn't fix your python smart contract issue, I think entering the full path might help you.

By: Hamid

Hamid — Sat, 18 Jun 2022 11:36:34 +0000

In reply to Syed Umar Bukhari.

I solved this problem and made an article in medium, maybe help someone else.
https://athamidn.medium.com/deploy-multi-file-smart-contracts-with-python-798a5d7cfa13

By: Hamid

Hamid — Fri, 17 Jun 2022 14:24:53 +0000

In reply to Syed Umar Bukhari. This is my py file:

import json
from solcx import compile_standard, install_solc
import os

install_solc("0.8.0")

with open('./SC.sol', 'r') as smartContract:
    currentSC = smartContract.read()


compiled_sol = compile_standard(
    {
        "language": "Solidity",
        "sources": {"SC.sol": {"content": currentSC}},

        "settings": {
            "outputSelection": {
                "*": {"*": ["abi", "metadata", "evm.bytecode", "evm.sourceMap"]}
            },
        },
    },
    solc_version="0.8.0",
)
print(compiled_sol)

---------- this is my SC.sol :

pragma solidity ^0.8.0;

import "./SafeERC20.sol";

contract ChildContract {
    address private owner;
    address private mainContractAddress;
    using SafeERC20 for IERC20;

    constructor(address _owner) {
        owner = _owner;
        mainContractAddress = msg.sender;
    }


    modifier onlyOwner() {
        require( msg.sender == mainContractAddress || msg.sender == owner , "Access denied!" );
        _;
    }
.....

----- and this is my SafeErc20.sol:

pragma solidity ^0.8.0;

import "./IERC20.sol";
import "./Address.sol";

/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
    using Address for addr

...

are are same directory, but still I have that error message :(

By: Syed Umar Bukhari

Syed Umar Bukhari — Fri, 17 Jun 2022 01:32:32 +0000

In reply to Hamid. Hi, Hamid. From what I understand of the problem you face in python smart contracts code is an import error. Did you try this to fix the python smart contract error? When you import something in the same directory, you should start with "./" so basically do "./bxyz" instead of just the name because then it treats it as an absolute path which won't work. Hope it helps. Let me know if solved the smart contracts python error, thanks.

By: Hamid

Hamid — Thu, 16 Jun 2022 14:12:24 +0000

I have a problem my smart contract has an import other contract a.sol import b.sol these are in the same folder but when I compile it , I get an error:

{"errors":[{"component":"general","errorCode":"6275","formattedMessage":"ParserError: Source \"SafeERC20.sol\" not found: File outside of allowed directories.\n -->