hardhat.config.ts

import '@nomiclabs/hardhat-waffle';
import '@typechain/hardhat';
import 'hardhat-gas-reporter';
import 'solidity-coverage';
import './tasks/accounts';
import './tasks/deploy';

import { config as dotenvConfig } from 'dotenv';
import { HardhatUserConfig } from 'hardhat/config';
import { NetworkUserConfig } from 'hardhat/types';
import { resolve } from 'path';

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

const chainIds = {
  goerli: 5,
  hardhat: 31337,
  kovan: 42,
  mainnet: 1,
  rinkeby: 4,
  ropsten: 3,
};

// Ensure that we have all the environment variables we need.
const mnemonic: string | undefined = process.env.MNEMONIC;
if (!mnemonic) {
  throw new Error('Please set your MNEMONIC in a .env file');
}

const infuraApiKey: string | undefined = process.env.INFURA_API_KEY;
if (!infuraApiKey) {
  throw new Error('Please set your INFURA_API_KEY in a .env file');
}

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

const config: HardhatUserConfig = {
  defaultNetwork: 'hardhat',
  gasReporter: {
    currency: 'USD',
    enabled: process.env.REPORT_GAS ? true : false,
    excludeContracts: [],
    src: './contracts',
  },
  networks: {
    hardhat: {
      accounts: {
        mnemonic,
      },
      chainId: chainIds.hardhat,
    },
    goerli: getChainConfig('goerli'),
    kovan: getChainConfig('kovan'),
    rinkeby: getChainConfig('rinkeby'),
    ropsten: getChainConfig('ropsten'),
  },
  paths: {
    artifacts: './artifacts',
    cache: './cache',
    sources: './contracts',
    tests: './test',
  },
  solidity: {
    version: '0.8.9',
    settings: {
      metadata: {
        // Not including the metadata hash
        // https://github.com/paulrberg/solidity-template/issues/31
        bytecodeHash: 'none',
      },
      // Disable the optimizer when debugging
      // https://hardhat.org/hardhat-network/#solidity-optimizer-support
      optimizer: {
        enabled: true,
        runs: 800,
      },
    },
  },
  typechain: {
    outDir: 'types',
    target: 'ethers-v5',
  },
};

export default config;