hardhat.config.js

require("@nomiclabs/hardhat-waffle");
require("@nomiclabs/hardhat-etherscan");
require("hardhat-deploy");
require("hardhat-contract-sizer");
require("dotenv").config();

const MAINNET_RPC_URL = process.env.MAINNET_RPC_URL;
const GOERLI_RPC_URL = process.env.GOERLI_RPC_URL;
const PRIVATE_KEY = process.env.PRIVATE_KEY;
const ETHERSCAN_API_KEY = process.env.ETHERSCAN_API_KEY;

/** @type import('hardhat/config').HardhatUserConfig */
module.exports = {
    solidity: "0.8.7",
    defaultNetwork: "hardhat",
    networks: {
        hardhat: {
            chainId: 31337,
        },
        localhost: {
            chainId: 31337,
        },
        mainnet: {
            url: MAINNET_RPC_URL,
            accounts: PRIVATE_KEY !== undefined ? [PRIVATE_KEY] : [],
            saveDeployments: true,
            chainId: 1,
        },
        goerli: {
            url: GOERLI_RPC_URL,
            accounts: PRIVATE_KEY !== undefined ? [PRIVATE_KEY] : [],
            saveDeployments: true,
            chainId: 5,
        },
    },
    mocha: {
        timeout: 200000, // 200 seconds max for running tests
    },
    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
        },
        player: {
            default: 1,
        },
    },
    etherscan: {
        apiKey: {
            goerli: ETHERSCAN_API_KEY,
        },
    },
};