Deploy multi files smart contract with Python

The easiest way of deploy your smart contract is Remix. But if you want to deploy your smart contracts with Python, I hope this guide will help you.

Assume we have a smart contract man.sol, and it contains two contract in a file, like this:

pragma solidity ^0.8.0;
import "./SafeERC20.sol";
contract mainContract {
  ... (Any code can be here ...)
}
contract childContract {
 ... (Other code here)
}

So we have a directory like this:

• main.sol
  -SafeERC20.sol
  -deploy.py

it doesn’t matter what is SafeERC20.sol, it can be any contract and our main.sol can import any other contract.

Know we need a python file to compile our smart contracts. Deploy.py is here:

import json
import os

import web3.eth
from web3 import Web3, HTTPProvider

from solcx import install_solc, set_solc_version,compile_standard
from dotenv import load_dotenv
#here install solidity version
install_solc('v0.8.0')
set_solc_version('v0.8.0')


file_path = "."
name = "main.sol"
input = {
    'language': 'Solidity',
    'sources': {
        name: {'urls': [file_path + "/" + name]}},
    'settings': {
        'outputSelection': {
            '*': {
                '*': ["abi", "metadata", "evm.bytecode", "evm.bytecode.sourceMap"],
            },
            'def': {name: ["abi", "evm.bytecode.opcodes"]},
        }
    }
}

output = compile_standard(input, allow_paths=file_path)

contracts = output["contracts"]

with open('compiled_code.json', "w") as file:
    json.dump(output, file)

bytecode = contracts["SC-.sol"]["mainContract"]["evm"]["bytecode"]["object"]

abi = contracts["main.sol"]["mainContract"]["abi"]


# Deploy on local ganache
# w3 = Web3(Web3.HTTPProvider("HTTP://127.0.0.1:7545"))
# chainId = 1337
# myAddress = "0x6235207DE426B0E3739529F1c53c14aaA271D..."
# privateKey = "0xdbe7f5a9c95ea2df023ad9......."

#Deploy on rinkeby infura rinkeby
w3 = Web3(Web3.HTTPProvider("https://rinkeby.infura.io/v3/......"))
chainId = 4

myAddress = "0xBa842323C4747609CeCEd164d61896d2Cf4..."
privateKey ="0x99de2de028a52668d3e94a00d47c4500db0afed3fe8e40..."

SCOnline = w3.eth.contract(abi=abi, bytecode=bytecode)

nonce = w3.eth.getTransactionCount(myAddress)

transaction = SCOnline.constructor().buildTransaction({
    "gasPrice": w3.eth.gas_price, "chainId": chainId, "from": myAddress, "nonce": nonce
})

signedTrx = w3.eth.account.sign_transaction(transaction, private_key= privateKey)



txHash = w3.eth.send_raw_transaction(signedTrx.rawTransaction)

txReceipt = w3.eth.wait_for_transaction_receipt(txHash)

Done!
If there was a function in our main smart contract(getAddress(uint id)), we can use it in our python code like this:

deployedSC =w3.eth.contract(address=txReceipt.contractAddress, abi=abi)

newAddress = deployedSC.functions.getAddress(1).call()