hardhat.config.ts

import { HardhatUserConfig, task } from "hardhat/config";
import type { NetworkUserConfig } from "hardhat/types";
import "@nomicfoundation/hardhat-toolbox";

import * as dotenv from "dotenv";
import { resolve } from "path";

const dotenvConfigPath: string = process.env.DOTENV_CONFIG_PATH || "./.env";
dotenv.config({ path: resolve(__dirname, dotenvConfigPath) });

// Ensure that we have all the environment variables we need.
const mnemonic: string | undefined = process.env.MNEMONIC;
if (!mnemonic) {
  throw new Error("Please set your MNEMONIC in a .env file");
}

const privateKey1: string | undefined = process.env.PRIVATE_KEY_1;
if (!privateKey1) {
  throw new Error("Please set your PRIVATE_KEY_1 in a .env file");
}

const privateKey2: string | undefined = process.env.PRIVATE_KEY_2;
if (!privateKey2) {
  throw new Error("Please set your PRIVATE_KEY_2 in a .env file");
}

const infuraApiKey: string | undefined = process.env.INFURA_API_KEY;
if (!infuraApiKey) {
  throw new Error("Please set your INFURA_API_KEY in a .env file");
}

const chainIds = {
  goerli: 5,
  hardhat: 31337,
  mainnet: 1,
};

function getChainConfig(chain: keyof typeof chainIds): NetworkUserConfig {
  let jsonRpcUrl: string;
  switch (chain) {
    default:
      jsonRpcUrl = "https://" + chain + ".infura.io/v3/" + infuraApiKey;
  }
  return {
    accounts: {
      count: 10,
      mnemonic,
      path: "m/44'/60'/0'/0",
    },
    chainId: chainIds[chain],
    url: jsonRpcUrl,
  };
}

const config: HardhatUserConfig = {
  defaultNetwork: "hardhat",
  networks: {
    hardhat: {
      accounts: {
        mnemonic,
      },
      chainId: chainIds.hardhat,
    },
    goerli: getChainConfig("goerli"),
  },
  solidity: "0.8.17",
  paths: { tests: "./tests" },
};

//hardhat.org/hardhat-runner/docs/guides/tasks-and-scripts#writing-hardhat-tasks
task("accounts", "Prints the list of accounts", async (taskArgs, hre) => {
  const accounts = await hre.ethers.getSigners();

  for (const account of accounts) {
    console.log(account.address);
  }
});

export default config;