hardhat.config.ts

import * as dotenv from "dotenv";

import { HardhatUserConfig, task } from "hardhat/config";
import "@nomiclabs/hardhat-etherscan";
import "@nomiclabs/hardhat-waffle";
import "@typechain/hardhat";
import "hardhat-gas-reporter";
import "solidity-coverage";
import "@openzeppelin/hardhat-upgrades";
import "hardhat-storage-layout";

dotenv.config();

// This is a sample Hardhat task. To learn how to create your own go to
// https://hardhat.org/guides/create-task.html
task("accounts", "Prints the list of accounts", async (taskArgs, hre) => {
  const accounts = await hre.ethers.getSigners();

  for (const account of accounts) {
    console.log(account.address);
  }
});

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

const accounts =
  process.env.PRIVATE_KEY !== undefined ? [process.env.PRIVATE_KEY] : [];

const config: HardhatUserConfig = {
  solidity: {
    version: "0.8.9",
    settings: {
      optimizer: {
        enabled: true,
        runs: 10,
      },
    },
  },
  networks: {
    mainnet: {
      accounts,
      url: process.env.MAINNET_URL || "",
    },
    goerli: {
      accounts,
      url: process.env.GOERLI_URL || "",
    },
    sepolia: {
      accounts,
      url: process.env.SEPOLIA_URL || "",
    },
    polygon: {
      accounts,
      url: process.env.POLYGON_URL || "",
    },
    polygonMumbai: {
      accounts,
      url: process.env.MUMBAI_URL || "",
    },
  },
  gasReporter: {
    enabled: process.env.REPORT_GAS !== undefined,
    currency: "USD",
  },
  etherscan: {
    apiKey: {
      mainnet: process.env.ETHERSCAN_API_KEY || "",
      goerli: process.env.ETHERSCAN_API_KEY || "",
      sepolia: process.env.ETHERSCAN_API_KEY || "",
      polygon: process.env.POLYGONSCAN_API_KEY || "",
      polygonMumbai: process.env.POLYGONSCAN_API_KEY || "",
    },
  },
};

export default config;