hardhat.config.js

require('dotenv').config()

require('@nomiclabs/hardhat-ethers')
require('@nomiclabs/hardhat-waffle')
require('@nomiclabs/hardhat-etherscan')
require('@nomiclabs/hardhat-solhint')
require('solidity-coverage')

/**
 * @type import('hardhat/config').HardhatUserConfig
 */
module.exports = {
  solidity: '0.8.4',
  paths: {
    artifacts: './artifacts',
    sources: './contracts',
    cache: './cache',
    tests: './__tests__'
  },
  networks: {
    mainnet: {
      url: process.env.MAINNET_URL || '',
      accounts:
        process.env.PRIVATE_KEY !== undefined ? [process.env.PRIVATE_KEY] : []
    },
    ropsten: {
      url: process.env.ROPSTEN_URL || '',
      accounts:
        process.env.PRIVATE_KEY !== undefined ? [process.env.PRIVATE_KEY] : []
    },
    rinkeby: {
      url: process.env.RINKEBY_URL || '',
      accounts:
        process.env.PRIVATE_KEY !== undefined ? [process.env.PRIVATE_KEY] : []
    },
    kovan: {
      url: process.env.KOVAN_URL || '',
      accounts:
        process.env.PRIVATE_KEY !== undefined ? [process.env.PRIVATE_KEY] : []
    },
    hardhat: {
      chainId: 1337
    }
  },
  gasReporter: {
    enabled: process.env.REPORT_GAS !== undefined,
    currency: 'USD'
  },
  etherscan: {
    apiKey: process.env.ETHERSCAN_API_KEY
  }
}