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 accounts
 * 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");
// const infuraKey = "fj4jll3k.....";
//
require("dotenv").config();
const fs = require("fs");

const mnemonic = fs.readFileSync(".secret").toString().trim();
const infuraKey = process.env.INFURA_KEY;

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>
   */

  networks: {
    // Useful for testing. The `development` name is special - truffle uses it by default
    // if it's defined here and no other network is specified at the command line.
    // You should run a client (like ganache-cli, geth or parity) in a separate terminal
    // tab if you use this network and you must also set the `host`, `port` and `network_id`
    // options below to some value.
    //
    development: {
      host: "127.0.0.1", // Localhost (default: none)
      port: 8545, // Standard Ethereum port (default: none)
      network_id: "*", // Any network (default: none)
      gasPrice: 100000000000,
      skipDryRun: true,
    },
    kovan: {
      provider: function () {
        return new HDWalletProvider(
          mnemonic,
          "https://kovan.infura.io/v3/" + infuraKey
        );
      },
      network_id: "42",
      // gas: 8000000,
      gasPrice: 55000000000,
      timeoutBlocks: 200,
      skipDryRun: true,
    },
    mainnet: {
      provider: function () {
        return new HDWalletProvider(
          mnemonic,
          "https://mainnet.infura.io/v3/" + infuraKey
        );
      },
      network_id: 1,
      // gas: 8000000,
      gasPrice: 79000000000,
      timeoutBlocks: 300,
      skipDryRun: true,
    },
  },

  // Set default mocha options here, use special reporters etc.
  mocha: {
    // timeout: 100000
  },

  // Configure your compilers
  compilers: {
    solc: {
      version: "0.6.12", // Fetch exact version from solc-bin (default: truffle's version)
      // docker: true,        // Use "0.5.1" you've installed locally with docker (default: false)
      settings: {
        // See the solidity docs for advice about optimization and evmVersion
        optimizer: {
          enabled: true,
          runs: 200,
        },
        //  evmVersion: "byzantium"
      },
    },
  },
};