hardhat.config.js

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

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

    const SEPOLIA_RPC_URL =
        process.env.SEPOLIA_RPC_URL || "https://eth-sepolia.g.alchemy.com/v2/YOUR-API-KEY"
    const PRIVATE_KEY = process.env.PRIVATE_KEY || "0x"

    module.exports = {
        defaultNetwork: "hardhat",
        networks: {
            hardhat: {
                // // If you want to do some forking, uncomment this
                // forking: {
                //   url: MAINNET_RPC_URL
                // }
                chainId: 31337,
            },
            localhost: {
                chainId: 31337,
            },
            sepolia: {
                url: SEPOLIA_RPC_URL,
                accounts: PRIVATE_KEY !== undefined ? [PRIVATE_KEY] : [],
                //   accounts: {
                //     mnemonic: MNEMONIC,
                //   },
                saveDeployments: true,
                chainId: 11155111,
            },
        },
        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,
            },
        },
        solidity: {
            compilers: [
                {
                    version: "0.8.7",
                },
                {
                    version: "0.8.10",
                },
            ],
        },
        mocha: {
            timeout: 500000, // 500 seconds max for running tests
        },
    }