scroll/contracts/scripts/foundry/DeployWeth.s.sol

// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.10;

import { Script } from "forge-std/Script.sol";
import { console } from "forge-std/console.sol";

import { WETH9 } from "../../src/L2/predeploys/WETH9.sol";

contract DeployWeth is Script {
  address L1_WETH_ADDR = vm.envAddress("L1_WETH_ADDR");
  address L2_WETH_ADDR = vm.envAddress("L2_WETH_ADDR");

  function run() external {
    // deploy weth only if we're running a private L1 network
    if (L1_WETH_ADDR == address(0)) {
      uint256 L1_WETH_DEPLOYER_PRIVATE_KEY = vm.envUint("L1_WETH_DEPLOYER_PRIVATE_KEY");
      vm.startBroadcast(L1_WETH_DEPLOYER_PRIVATE_KEY);
      WETH9 weth = new WETH9();
      L1_WETH_ADDR = address(weth);
      vm.stopBroadcast();
    }

    logAddress("L1_WETH_ADDR", L1_WETH_ADDR);
    logAddress("L2_WETH_ADDR", L2_WETH_ADDR);
  }

  function logAddress(string memory name, address addr) internal view {
    console.log(string(abi.encodePacked(name, "=", vm.toString(address(addr)))));
  }
}