hardhat.config.js

require("dotenv").config();
require("@nomiclabs/hardhat-ethers")
require("@nomicfoundation/hardhat-toolbox");
require('hardhat-deploy');

// 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
 */

let accounts = [];

if (process.env.PRIVATE_KEY) {
  accounts = [`0x${process.env.PRIVATE_KEY}`, ...accounts];
} else {
  accounts = [`0x${process.env.DEV_PRIVATE_KEY}`, ...accounts];
}

module.exports = {
  solidity: {
    version: "0.8.17",
    settings: {
      optimizer: {
        enabled: true,
        runs: 9999,
      },
    },
  },
  networks: {
    localhost: {
      url: "http://127.0.0.1:8545",
    },
    mainnet: {
      url: process.env.MAINNET_RPC || "https://mainnet.infura.io/v3/",
      accounts,
    },
    goerli: {
      url: process.env.GOERLI_RPC || "https://goerli.infura.io/v3/",
      accounts,
      gasPrice: 10000000000,
    },
    polygon: {
      url: process.env.POLYGON_RPC || "https://polygon-rpc.com",
      accounts,
    },
    mumbai: {
      url: process.env.MUMBAI_RPC || "https://rpc-mumbai.maticvigil.com",
      accounts,
    },
  },
  etherscan: {
    apiKey: {
      mainnet: process.env.ETHERSCAN_API_KEY,
      goerli: process.env.ETHERSCAN_API_KEY,
      polygon: process.env.POLYGONSCAN_API_KEY,
      polygonMumbai: process.env.POLYGONSCAN_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
    },
  },
};