eth-brownie

# 1. First, set up a Brownie project and a simple contract: # $ brownie init simple_project # $ cd simple_project # $ mkdir contracts # $ echo '// SPDX-License-Identifier: MIT\npragma solidity ^0.8.0;\ncontract SimpleStorage {\n uint256 public number;\n function store(uint256 _number) public { number = _number; }\n function retrieve() public view returns (uint256) { return number; }\n}' > contracts/SimpleStorage.sol # $ mkdir scripts # 2. Then, create scripts/deploy_and_interact.py with the following content: from brownie import SimpleStorage, accounts, network def main(): # Connect to a local development network (e.g., Ganache, Hardhat) # If not already connected, Brownie will attempt to launch a local 'ganache-cli' fork if not network.is_connected(): network.connect('development') print(f"Active network: {network.show_active()}") # Get the first available account for deployment deployer = accounts[0] print(f"Deploying from account: {deployer.address}") # Deploy the SimpleStorage contract print("Deploying SimpleStorage...") simple_storage = SimpleStorage.deploy({"from": deployer}) print(f"SimpleStorage deployed at: {simple_storage.address}") # Interact with the contract initial_value = simple_storage.retrieve() print(f"Initial stored value: {initial_value}") new_value = 777 print(f"Storing new value: {new_value}") tx = simple_storage.store(new_value, {"from": deployer}) tx.wait(1) # Wait for the transaction to be mined updated_value = simple_storage.retrieve() print(f"Updated stored value: {updated_value}") # 3. Finally, run the script from your project root: # $ brownie run scripts/deploy_and_interact.py --network development