truffle-config.js

const truffleConfig = require("@gnosis.pm/util-contracts/src/util/truffleConfig")

const argv = require("yargs").help(false).version(false).option("network", {
  type: "string",
}).argv

const DEFAULT_GAS_LIMIT = 6e6
const DEFAULT_GAS_PRICE_GWEI = 5
const DEFAULT_MNEMONIC = "candy maple cake sugar pudding cream honey rich smooth crumble sweet treat"

// Load env vars
require("dotenv").config()

// Get the mnemonic
const privateKey = process.env.PK
let mnemonic = process.env.MNEMONIC
if (!privateKey && !mnemonic) {
  mnemonic = DEFAULT_MNEMONIC
}

// Solc
let solcUseDocker = process.env.SOLC_USE_DOCKER === "true" || false
let solcVersion = "0.5.6"

// Gas price
const gasPriceGWei = process.env.GAS_PRICE_GWEI || DEFAULT_GAS_PRICE_GWEI

// Gas limit
const gas = process.env.GAS_LIMIT || DEFAULT_GAS_LIMIT

// Allow to add an additional network (useful for docker-compose setups)
//  i.e. NETWORK='{ "name": "docker", "networkId": "99999", "url": "http://rpc:8545", "gas": "6700000", "gasPrice": "25000000000"  }'
let additionalNetwork = process.env.NETWORK ? JSON.parse(process.env.NETWORK) : null

const urlDevelopment = process.env.GANACHE_HOST || "localhost"

// network key
const infuraKey = process.env.INFURA_KEY
if ((argv.network === "rinkeby" || argv.network === "mainnet") && !infuraKey) {
  console.log("Error: no Infura key found! You can create a new project key after registering an account at https://infura.io/")
  process.exit(1)
}

const { gas: gasLog } = require("minimist")(process.argv.slice(2), { alias: { gas: "g" } })

module.exports = {
  ...truffleConfig({
    mnemonic,
    privateKey,
    urlRinkeby: "https://rinkeby.infura.io/v3/".concat(infuraKey),
    urlKovan: "https://kovan.infura.io/v3/".concat(infuraKey),
    urlMainnet: "https://mainnet.infura.io/v3/".concat(infuraKey),
    urlDevelopment,
    gasPriceGWei,
    gas,
    additionalNetwork,
    optimizedEnabled: true,
    solcUseDocker,
    solcVersion,
  }),
  // https://github.com/mochajs/mocha/wiki/Using-mocha-programmatically#set-options
  mocha: {
    reporter: gasLog ? "eth-gas-reporter" : "spec",
    reporterOptions: {
      currency: "USD",
      gasPrice: 20,
      showTimeSpent: true,
    },
  },
  plugins: ["truffle-plugin-verify"],
  api_keys: {
    etherscan: process.env.MY_ETHERSCAN_API_KEY,
  },
}