hardhat.config.js

/**
 * @type import('hardhat/config').HardhatUserConfig
 */
require("@nomiclabs/hardhat-waffle");
require("@nomiclabs/hardhat-ethers");
require("@nomiclabs/hardhat-truffle5");
require("@nomiclabs/hardhat-etherscan");
require("hardhat-deploy");

require("dotenv").config();

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 KOVAN_RPC_URL =
  process.env.KOVAN_RPC_URL ||
  "https://eth-kovan.alchemyapi.io/v2/your-api-key";
const MNEMONIC = process.env.MNEMONIC || "your mnemonic";
const ETHERSCAN_API_KEY =
  process.env.ETHERSCAN_API_KEY || "Your etherscan API key";
// optional
const PRIVATE_KEY = process.env.PRIVATE_KEY || "your private key";

module.exports = {
  defaultNetwork: "hardhat",
  networks: {
    hardhat: {
      // // If you want to do some forking, uncomment this
      // forking: {
      //   url: MAINNET_RPC_URL
      // }
    },
    localhost: {},
    kovan: {
      url: KOVAN_RPC_URL,
      // accounts: [PRIVATE_KEY],
      accounts: {
        mnemonic: MNEMONIC,
      },
      saveDeployments: true,
    },
    rinkeby: {
      url: RINKEBY_RPC_URL,
      // accounts: [PRIVATE_KEY],
      accounts: {
        mnemonic: MNEMONIC,
      },
      saveDeployments: true,
    },
    ganache: {
      url: "http://localhost:8545",
      accounts: {
        mnemonic: MNEMONIC,
      },
    },
    mainnet: {
      url: MAINNET_RPC_URL,
      // accounts: [PRIVATE_KEY],
      accounts: {
        mnemonic: MNEMONIC,
      },
      saveDeployments: true,
    },
    polygon: {
      url: "https://rpc-mainnet.maticvigil.com/",
      // accounts: [PRIVATE_KEY],
      accounts: {
        mnemonic: MNEMONIC,
      },
      saveDeployments: true,
    },
    mumbai: {
      url: "https://rpc-mumbai.maticvigil.com/",
      // accounts: [PRIVATE_KEY],
      accounts: {
        mnemonic: MNEMONIC,
      },
      saveDeployments: true,
    },
  },
  etherscan: {
    // Your API key for Etherscan
    // Obtain one at https://etherscan.io/
    apiKey: ETHERSCAN_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
    },
    feeCollector: {
      default: 1,
    },
  },
  solidity: {
    compilers: [
      {
        version: "0.8.13",
      },
      {
        version: "0.8.12",
      },
      {
        version: "0.8.11",
      },
      {
        version: "0.7.0",
      },
      {
        version: "0.6.6",
      },
      {
        version: "0.4.24",
      },
    ],
  },
  mocha: {
    timeout: 100000,
  },
};