hardhat.config.ts

import { config as dotenvConfig } from "dotenv";
import { resolve } from "path";
dotenvConfig({ path: resolve(__dirname, "./.env") });

import "@nomiclabs/hardhat-waffle";
import "hardhat-typechain";
import "@nomiclabs/hardhat-ganache";
import "solidity-coverage";


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

function createLocalHostConfig() {
  const url: string = "http://localhost:8545";
  return {
    accounts: {
      count: 10,
      initialIndex: 0,
      mnemonic,
      path: "m/44'/60'/0'/0",
    },
    url,
  };
}

const config = {
  defaultNetwork: "localhost",
  networks: {
    localhost: createLocalHostConfig()
  },
  solidity: {
    version: "0.5.16",
    settings: {
      // https://hardhat.org/hardhat-network/#solidity-optimizer-support
      optimizer: {
        enabled: true,
        runs: 200,
      },
    },
  }
};

export default config;