tornado-contracts/scripts/permit2.ts

import path from 'path';
import { readFile } from 'fs/promises';

import { ethers } from 'hardhat';
import { parseEther } from 'ethers';

import * as constants from './constants';

const { permit2Address } = constants;

/**
 * Deploy Deterministic Deployment Proxy and Permit2
 *
 * https://github.com/Arachnid/deterministic-deployment-proxy
 * https://github.com/Uniswap/permit2
 */
export async function deployPermit2() {
    const [owner] = await ethers.getSigners();

    const { provider } = owner;

    const { deterministicProxy, deterministicSigner, deterministicSignerCost } = constants;

    const deterministicSignedTx = await readFile(path.join(__dirname, './deterministicTx.txt'), { encoding: 'utf-8' });

    // Send deployment cost for deterministicProxyDeploy contract
    (await owner.sendTransaction({ to: deterministicSigner, value: parseEther(deterministicSignerCost) })).wait();

    (await provider.broadcastTransaction(deterministicSignedTx)).wait();

    console.log(`Deterministic Deployment Proxy code: ${await provider.getCode(deterministicProxy)}`);

    // Send Permit2 tx
    const data = await readFile(path.join(__dirname, './permit2tx.txt'), { encoding: 'utf-8' });

    (await owner.sendTransaction({ to: deterministicProxy, data })).wait();

    const permit2code = await provider.getCode(permit2Address);

    console.log(`Permit2 code: ${permit2code ? permit2code.slice(0, 20) : ''}`);
}