hardhat.config.js

require("@nomiclabs/hardhat-waffle")
require("hardhat-gas-reporter")
require("@nomiclabs/hardhat-etherscan")
require("dotenv").config()
require("solidity-coverage")
require("hardhat-deploy")
require("hardhat-gas-reporter")

/** @type import('hardhat/config').HardhatUserConfig */
const RINKEBY_RPC_URL = process.env.RINKEBY_RPC_URL || ""
const PRIVATE_KEY = process.env.PRIVATE_KEY || ""
const ETHERSCAN_API_KEY = process.env.ETHERSCAN_API_KEY || ""
const COINMARKETCAP_API_KEY = process.env.COINMARKETCAP_API_KEY || ""

module.exports = {
    defaultNetwork: "hardhat",
    networks: {
        hardhat: {
            chainId: 31337,
            // gasPrice: 130000000000,
        },
        // kovan: {
        //     url: KOVAN_RPC_URL,
        //     accounts: [PRIVATE_KEY],
        //     chainId: 42,
        //     blockConfirmations: 6,
        //     gas: 6000000,
        // },
        rinkeby: {
            url: RINKEBY_RPC_URL,
            accounts: [PRIVATE_KEY],
            chainId: 4,
            blockConfirmations: 6,
        },
    },
    solidity: {
        compilers: [
            {
                version: "0.8.8",
            },
            {
                version: "0.6.6",
            },
        ],
    },
    etherscan: {
        apiKey: ETHERSCAN_API_KEY,
    },
    gasReporter: {
        enabled: true,
        currency: "USD",
        outputFile: "gas-report.txt",
        noColors: true,
        coinmarketcap: COINMARKETCAP_API_KEY,
    },
    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
        },
    },
    mocha: {
        timeout: 500000,
    },
}