hardhat.config.js

require("hardhat-gas-reporter");
require('solidity-coverage')
require("@nomiclabs/hardhat-waffle");
require("@nomiclabs/hardhat-etherscan");
require('hardhat-deploy');

require('dotenv').config();

const PRIVATE_KEY = process.env.PRIVATE_KEY;
const ALCHEMY_API_KEY = process.env.ALCHEMY_API_KEY;
const ALCHEMY_API_KEY_MAINNET = process.env.ALCHEMY_API_KEY_MAINNET;
const ETHERSCAN_API_KEY = process.env.ETHERSCAN_API_KEY;

module.exports = {
  defaultNetwork: "rinkeby",
  networks: {
    hardhat: {
    },
    rinkeby: {
      url: `https://eth-rinkeby.alchemyapi.io/v2/${ALCHEMY_API_KEY}`,
      accounts: [PRIVATE_KEY]
    },
    mainnet: {
      url: `https://eth-mainnet.alchemyapi.io/v2/${ALCHEMY_API_KEY_MAINNET}`,
      accounts: [PRIVATE_KEY]
    }
  },
  solidity: {
    version: "0.8.7",
    settings: {
      optimizer: {
        enabled: true,
        runs: 1000
      }
    }
  },
  paths: {
    sources: "./contracts",
    tests: "./test",
    cache: "./cache",
    artifacts: "./artifacts"
  },
  mocha: {
    timeout: 20000
  },
  namedAccounts: {
    deployer: {
        default: 0, // here this will by default take the first account as deployer
        1: 0 // similarly on mainnet it will take the first account as deployer. Note though that depending on how hardhat network are configured, the account 0 on one network can be different than on another
    },
    feeCollector: {
        default: 1
    }
  },
  etherscan: {
    apiKey: ETHERSCAN_API_KEY,
  }
}