hardhat.config.js

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

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

/**
 * @type import('hardhat/config').HardhatUserConfig
 */

const ETHERSCAN_API_KEY = process.env.ETHERSCAN_API_KEY || "Your etherscan API key"
const POLYGONSCAN_API_KEY = process.env.POLYGONSCAN_API_KEY || "Your polygonscan API key"
const FORKING_BLOCK_NUMBER = process.env.FORKING_BLOCK_NUMBER
const MAINNET_RPC_URL =
    process.env.MAINNET_RPC_URL ||
    process.env.ALCHEMY_MAINNET_RPC_URL ||
    "https://eth-mainnet.alchemyapi.io/v2/your-api-key"
const RINKEBY_RPC_URL =
    process.env.RINKEBY_RPC_URL || "https://eth-rinkeby.alchemyapi.io/v2/your-api-key"
const PRIVATE_KEY = process.env.PRIVATE_KEY
const REPORT_GAS = process.env.REPORT_GAS || false

module.exports = {
    networks: {
        hardhat: {
            // If you want to do some forking set `enabled` to true
            forking: {
                url: MAINNET_RPC_URL,
                blockNumber: FORKING_BLOCK_NUMBER,
                enabled: false,
            },
            chainId: 31337,
        },
        localhost: {
            chainId: 31337,
        },
        rinkeby: {
            url: RINKEBY_RPC_URL,
            accounts: PRIVATE_KEY !== undefined ? [PRIVATE_KEY] : [],
            saveDeployments: true,
            chainId: 4,
        },
        mainnet: {
            url: MAINNET_RPC_URL,
            accounts: PRIVATE_KEY !== undefined ? [PRIVATE_KEY] : [],
            saveDeployments: true,
            chainId: 1,
        },
    },
    etherscan: {
        // yarn hardhat verify --network <NETWORK> <CONTRACT_ADDRESS> <CONSTRUCTOR_PARAMETERS>
        apiKey: {
            rinkeby: ETHERSCAN_API_KEY,
            kovan: ETHERSCAN_API_KEY,
            polygon: POLYGONSCAN_API_KEY,
        },
    },
    gasReporter: {
        enabled: REPORT_GAS,
        currency: "USD",
        outputFile: "gas-report.txt",
        noColors: true,
        // coinmarketcap: process.env.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
        },
    },
    solidity: {
        compilers: [
            {
                version: "0.8.7",
            },
            {
                version: "0.6.6",
            },
        ],
    },
    mocha: {
        timeout: 200000, // 200 seconds max for running tests
    },
}