## Account Abstraction Lesson 8: Deploy Ethereum This is an exciting time in our learning journey. We have finished our **minimal contract**. Now it is time to write some **deploy scripts**. We will be setting up a lot of code in this lesson. **We won't be going too deep into explanations here**. However, you are encouraged to do so on your own. --- Let's start by naming our first script in the `script` folder. Name it `DeployMinimal.s.sol`. Let's also go ahead and another script - `HelperConfig.s.sol`. We will need a HelperConfig because the EntryPoint contract will vary on different chains. And we will also need a `SendPackedUserOp.s.sol` This will be a vital piece for us and we will be doing a lot of work in this script. Let's get started in `DeployMinimal.s.sol`. **<span style="color:red">DeployMinimal.s.sol</span>** ```js // SPDX-License-Identifier: MIT pragma solidity 0.8.24; import {Script} from "forge-std/Script.sol"; import {MinimalAccount} from "src/ethereum/MinimalAccount.sol"; contract DeployMinimal is Script { function run() public {} function deployMinimalAccount() public {} } ``` If you remember(or go back) to our MinimalAccount, the constructor passes `address entrypoint`. **<span style="color:red">MinimalAccount.sol</span>** ```js constructor(address entrypoint) ``` Let's set this up in our `HelperConfig.s.sol`. > ❗ **NOTE** This is a large block of code below. Please be sure to follow along with the video. **<span style="color:red">HelperConfig.s.sol</span>** ```js // SPDX-License-Identifier: MIT pragma solidity 0.8.24; import {Script} from "forge-std/Script.sol"; contract HelperConfig is Script { error HelperConfig__InvalidChainId(); struct NetworkConfig { address entryPoint; address account; } uint256 constant ETH_SEPOLIA_CHAIN_ID = 11155111; uint256 constant ZKSYNC_SEPOLIA_CHAIN_ID = 300; uint256 constant LOCAL_CHAIN_ID = 31337; address constant BURNER_WALLET = 0X; //Your burner testnet wallet address here NetworkConfig public localNetworkConfig; mapping(uint256 chainId => NetworkConfig) public networkConfigs; constructor() { networkConfigs[ETH_SEPOLIA_CHAIN_ID] = getEthSepoliaConfig(); } function getConfig() public returns (NetworkConfig memory) { return getConfigByChainId(block.chainid); } function getConfigByChainId(uint256 chainId) public returns (NetworkConfig memory) { if (chainId == LOCAL_CHAIN_ID) { return getOrCreateAnvilEthConfig(); } else if (networkConfigs[chainId].account != address(0)) { return networkConfigs[chainId]; } else { revert HelperConfig__InvalidChainId(); } } function getEthSepoliaConfig() public pure returns (NetworkConfig memory) { return NetworkConfig({ entryPoint: 0x5FF137D4b0FDCD49DcA30c7CF57E578a026d2789, account: BURNER_WALLET }); } function getZkSyncSepoliaConfig() public pure returns (NetworkConfig memory) { return NetworkConfig({ entryPoint: address(0), // There is no entryPoint in zkSync! account: BURNER_WALLET }); } function getOrCreateAnvilEthConfig() public returns (NetworkConfig memory) { if (localNetworkConfig.account != address(0)) { return localNetworkConfig; } } } ``` Now that we have our `HelperConfig`, let's import it in `DeployMinimal.s.sol`. **<span style="color:red">DeployMinimal.s.sol</span>** ```js import { HelperConfig } from "script/HelperConfig.s.sol"; ``` Then we need to add it to our `deployMinimalAccount` function. ```js function deployMinimalAccount() public returns (HelperConfig, MinimalAccount) { HelperConfig helperConfig = new HelperConfig(); HelperConfig.NetworkConfig memory config = helperConfig.getConfig(); vm.startBroadcast(); MinimalAccount minimalAccount = new MinimalAccount(config.account); minimalAccount.transferOwnership(msg.sender); vm.stopBroadcast(); return (helperConfig, minimalAccount); } ``` Let's run `forge build` in our terminal to check that everything is compiling. > ❗ **NOTE** You may see some yellow warnings, but that is not concerning at this point. As long as there aren't any red errors, you are good. We did a lot of coding in this lesson. However, we've still go a way to go. Take a minute to reflect on the code that we have written so far. When you are ready, move on to the next lesson.