hardhat.config.js

const {
  has,
  assoc,
} = require('ramda')
const {
  ENDPOINT_ENV_VAR_KEY,
  ETHERSCAN_ENV_VAR_KEY
} = require('./lib/constants')

require('hardhat-erc1820')
require('@nomiclabs/hardhat-web3')
require('@nomiclabs/hardhat-waffle')
require('@nomiclabs/hardhat-etherscan')
require('@openzeppelin/hardhat-upgrades')

const SUPPORTED_NETWORKS = [
  'fantom',
  'polygon',
  'rinkeby',
  'ropsten',
  'bscMainnet',
  'ambrosTestnet',
  'arbitrum',
  'ethMainnet',
  'goerli',
  'sepolia',
]

const getAllSupportedNetworks = _ => {
  if (!has(ENDPOINT_ENV_VAR_KEY, process.env)) {
    let errorMsg = `✘ No '${
      ENDPOINT_ENV_VAR_KEY
    }' environment variable found! Please provide one! (See 'README.md' for more details)`
    throw new Error(errorMsg)
  } else {
    return SUPPORTED_NETWORKS.reduce((_acc, _network) =>
      assoc(_network, { url: process.env[ENDPOINT_ENV_VAR_KEY] }, _acc), {}
    )
  }
}

const addLocalNetwork = _allSupportedNetworks =>
  assoc('localhost', { url: 'http://localhost:8545' }, _allSupportedNetworks)

const getAllNetworks = _ =>
  addLocalNetwork(getAllSupportedNetworks())

module.exports = {
  networks: getAllNetworks(),
  solidity: {
    compilers: [
      {
        version: '0.6.2',
        settings: {
          optimizer: {
            runs: 200,
            enabled: true,
          }
        }
      },
      {
        version: '0.4.18',
        settings: {
          optimizer: {
            runs: 200,
            enabled: true,
          }
        }
      },
    ],
    overrides: {
      'contracts/wEth.sol': {
        version: '0.4.18',
      }
    }
  },
  etherscan: {
    apiKey: process.env[ETHERSCAN_ENV_VAR_KEY]
  },
}