truffle-config.js

/**
 * Use this file to configure your truffle project. It's seeded with some
 * common settings for different networks and features like migrations,
 * compilation and testing. Uncomment the ones you need or modify
 * them to suit your project as necessary.
 *
 * More information about configuration can be found at:
 *
 * truffleframework.com/docs/advanced/configuration
 *
 * To deploy via Infura you'll need a wallet provider (like truffle-hdwallet-provider)
 * to sign your transactions before they're sent to a remote public node. Infura API
 * keys are available for free at: infura.io/register
 *
 * You'll also need a mnemonic - the twelve word phrase the wallet uses to generate
 * public/private key pairs. If you're publishing your code to GitHub make sure you load this
 * phrase from a file you've .gitignored so it doesn't accidentally become public.
 *
 */
const HDWalletProvider = require("@truffle/hdwallet-provider");
require("dotenv").config();

module.exports = {
  /**
   * Networks define how you connect to your ethereum client and let you set the
   * defaults web3 uses to send transactions. If you don't specify one truffle
   * will spin up a development blockchain for you on port 9545 when you
   * run `develop` or `test`. You can ask a truffle command to use a specific
   * network from the command line, e.g
   *
   * $ truffle test --network <network-name>
   */
  contracts_directory: "./contracts/",
  networks: {
    "ethereum.goerli": {
      provider: () =>
        new HDWalletProvider({
          privateKeys: [process.env.PRIVATE_KEY],
          providerOrUrl: `wss://goerli.infura.io/ws/v3/${process.env.INFURA_ID}`,
          chainId: 5
        }),
      network_id: 5,
      gas: 3000000, // Goerli has a lower block limit than mainnet
      confirmations: 1, // # of confs to wait between deployments. (default: 0)
      networkCheckTimeout: 90000, // Seems like the default value was not enough
      timeoutBlocks: 200, // # of blocks before a deployment times out  (minimum/default: 50)
      skipDryRun: true // Skip dry run before migrations? (default: false for public nets )
    }
  },

  // The `solc` compiler is set to optimize output bytecode with 200 runs, which is the standard these days
  compilers: {
    solc: {
      version: "0.8.7",
      settings: { optimizer: { enabled: true, runs: 200 } }
    }
  },

  // This plugin allows to verify the source code of your contracts on Etherscan with this command:
  // ETHERSCAN_API_KEY=<your_etherscan_api_key> truffle run verify <contract_name> --network <network_name>
  plugins: ["truffle-plugin-verify"],

  // This is just for the `truffle-plugin-verify` to catch the API key
  api_keys: {
    etherscan: process.env.ETHERSCAN_API_KEY
  }
};