hardhat.config.ts

import '@typechain/hardhat';
import '@nomiclabs/hardhat-waffle';
import '@nomiclabs/hardhat-etherscan';
import 'hardhat-gas-reporter';
import 'dotenv/config';
import 'hardhat-deploy';
import 'solidity-coverage';
import { HardhatUserConfig } from 'hardhat/config';
import '@nomiclabs/hardhat-ethers';

const SEPOLIA_RPC_URL = process.env.SEPOLIA_RPC_URL || 'https://rpc.sepolia.io';
const PRIVATE_KEY = process.env.PRIVATE_KEY || '0xkey';
const ETHERSCAN_API_KEY = process.env.ETHERSCAN_API_KEY || 'key';
const COINMARKETCAP_API_KEY = process.env.COINMARKETCAP_API_KEY || 'key';

const config: HardhatUserConfig = {
  defaultNetwork: 'hardhat',
  networks: {
    sepolia: {
      url: SEPOLIA_RPC_URL,
      accounts: [PRIVATE_KEY],
      chainId: 11155111,
    },
    localhost: {
      url: 'http://127.0.0.1:8545/',
      // Hardhat autoplaces the accounts
      chainId: 31337,
    },
  },
  // If working with multiple versions, indicate them here.
  solidity: {
    compilers: [
      {
        version: '0.8.8',
      },
      {
        version: '0.6.6',
      },
    ],
  },
  etherscan: {
    apiKey: ETHERSCAN_API_KEY,
    customChains: [
      {
        network: 'sepolia',
        chainId: 11155111,
        urls: {
          apiURL: 'https://api-sepolia.etherscan.io/api',
          browserURL: 'https://sepolia.etherscan.io',
        },
      },
    ],
  },
  gasReporter: {
    enabled: true,
    outputFile: 'gas-report.txt',
    noColors: true,
    currency: 'USD',
    // coinmarketcap: COINMARKETCAP_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
    },
  },
};

export default config;