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:
 *
 * trufflesuite.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.....";
//
const fs = require('fs'); 
let secrets; 
if (fs.existsSync('secrets.json')) { secrets = JSON.parse(fs.readFileSync('secrets.json', 'utf8')); }

module.exports = {
  networks: {
    rinkeby: {
      // Special function to setup the provider
      provider: function () {
        // Setting the provider with the Infura Rinkeby address and Token
        return new HDWalletProvider(secrets.mnemonic, "https://rinkeby.infura.io/v3/7c42497e624448fcb7deb88e2afc2d04")
      },
      // Network id is 4 for Rinkeby
      network_id: 4
    }
    /*ropsten: {
      provider: () => new HDWalletProvider('total april swamp rebuild shiver sheriff oyster omit dish nominee open belt', 'https://ropsten.infura.io/v3/3bf69fe7dcf84d9ba59ea542e94ee035'),
      network_id: 3,       // Ropsten's id
      gas: 1900000,        // Ropsten has a lower block limit than mainnet
      confirmations: 2,    // # of confs to wait between deployments. (default: 0)
      timeoutBlocks: 200,  // # of blocks before a deployment times out  (minimum/default: 50)
   // Skip dry run before migrations? (default: false for public nets )
    },*/
    /*
    ropsten: {
      provider: function() {
        return new HDWalletProvider('total april swamp rebuild shiver sheriff oyster omit dish nominee open belt', 'https://ropsten.infura.io/v3/3bf69fe7dcf84d9ba59ea542e94ee035');
      },
      network_id: 3,
      host: "localhost",
      port:  8545,
      gas: 1000000
    }*/
    
  },


  mocha: {
  },

  // Configure your compilers
  compilers: {
    solc: {

    },
  },
};