hardhat.config.ts

import { config as dotenvConfig } from "dotenv";
import { resolve } from "path";
import { HardhatUserConfig } from "hardhat/config";
import { NetworkUserConfig } from "hardhat/types";
import '@openzeppelin/hardhat-upgrades';
import "@typechain/hardhat";
import "@nomiclabs/hardhat-ethers";
import "@nomiclabs/hardhat-waffle";
import "@nomiclabs/hardhat-etherscan";
import "hardhat-gas-reporter";

dotenvConfig({ path: resolve(__dirname, "./.env") });

const MNEMONIC = process.env.MNEMONIC || "";
const ETHERSCAN_API_KEY = process.env.ETHERSCAN_API_KEY || "";
const INFURA_API_KEY = process.env.INFURA_API_KEY || "";

const chainIds = {
  ganache: 1337,
  goerli: 5,
  hardhat: 31337,
  mainnet: 1,
  mantleTestnet: 5001
};

function createTestnetConfig(network: keyof typeof chainIds): NetworkUserConfig {
  const url: string = "https://" + network + ".infura.io/v3/" + INFURA_API_KEY;
  return {
    accounts: {
      count: 10,
      initialIndex: 0,
      mnemonic: MNEMONIC,
      path: "m/44'/60'/0'/0",
    },
    chainId: chainIds[network],
    url,
  };
}

const config: HardhatUserConfig = {
  defaultNetwork: "hardhat",
  solidity: {
    compilers: [
      {
        version: "0.8.9",
      },
      {
        version: "0.8.15",
      }
    ],
  },
  networks: {
    hardhat: {
      accounts: {
        mnemonic: MNEMONIC,
      },
      chainId: chainIds.hardhat,
    },
    mainnet: createTestnetConfig("mainnet"),
    goerli: createTestnetConfig("goerli"),
    mantleTestnet: {
      accounts: {
        count: 10,
        initialIndex: 0,
        mnemonic: MNEMONIC,
        path: "m/44'/60'/0'/0",
      },
      chainId: chainIds.mantleTestnet,
      url: 'https://rpc.testnet.mantle.xyz',
    },
  },
  etherscan: {
    apiKey: {
      goerli: ETHERSCAN_API_KEY,
    }
  },
  gasReporter: {
    enabled: process.env.REPORT_GAS ? true : false,
  },
  typechain: {
    outDir: "typechain",
    target: "ethers-v5",
  },
};

export default config;