hardhat.config.js

require("@nomicfoundation/hardhat-toolbox");
require("@nomiclabs/hardhat-etherscan");
require("@nomiclabs/hardhat-ethers");
require("@nomicfoundation/hardhat-chai-matchers");
require("dotenv").config();

const chainIds = {
  ganache: 1337,
  goerli: 5,
  hardhat: 31337,
  mainnet: 1,
};

// https://eth-mainnet.alchemyapi.io/v2/<key>


const MNEMONIC = process.env.MNEMONIC || "";
const ETHERSCAN_API_KEY = process.env.ETHERSCAN_API_KEY || "";
const INFURA_API_KEY = process.env.INFURA_API_KEY || "";
const ALCHEMY_KEY = process.env.ALCHEMY_KEY || "";

function createTestnetConfig(network) {
  const url = "https://" + network + ".infura.io/v3/" + INFURA_API_KEY;
  return {
    accounts: {
      count: 10,
      initialIndex: 0,
      mnemonic: MNEMONIC,
      // m / purpose' / coin_type' / account' / change / address_index
      path: "m/44'/60'/0'/0",
    },
    chainId: chainIds[network],
    url,
  };
}

// You need to export an object to set up your config
// Go to https://hardhat.org/config/ to learn more

const fork_url = "https://eth-mainnet.alchemyapi.io/v2/" + ALCHEMY_KEY;

module.exports = {
  defaultNetwork: "hardhat",
  networks: {
    hardhat: {
      forking: {
        url: fork_url,
        blockNumber: 14003880,
      },
      accounts: {
        count: 5,
        mnemonic: MNEMONIC,
      },
      chainId: chainIds.hardhat,
      blockGasLimit: 28500000, // this is also eth mainnet current block limit
    },
    mainnet: createTestnetConfig("mainnet"),
    goerli: createTestnetConfig("goerli"),
    kovan: createTestnetConfig("kovan"),
    rinkeby: createTestnetConfig("rinkeby"),
    ropsten: createTestnetConfig("ropsten"),
  },
  solidity: {
    compilers: [
      {
        version: "0.8.10",
      },
    ],
  },
  etherscan: {
    apiKey: ETHERSCAN_API_KEY,
  },
};