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');
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>
  */
 
 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: 7545,            // Standard Ethereum port (default: none)
     network_id: "5777",       // Any network (default: none)
   },
   rinkeby: {
     provider: function() {
       return new HDWalletProvider(`${process.env.MNEMONIC}`, `https://rinkeby.infura.io/v3/${process.env.INFURA_ID}`)
     },
     network_id: 4
   },
   ropsten: {
     provider: function() {
       return new HDWalletProvider(`${process.env.MNEMONIC}`, `https://ropsten.infura.io/v3/${process.env.INFURA_ID}`)
     },
     network_id: 3
   }
 },
 
 // Set default mocha options here, use special reporters etc.
 mocha: {
   // timeout: 100000
 },
 
 // Configure your compilers
 compilers: {
   solc: {
     version: "0.6.11",    // 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: false,
       runs: 200
       },
     evmVersion: "byzantium"
     }
   },
 }
};