truffle-config.js

require("dotenv").config();

var HDWalletProvider = require("truffle-hdwallet-provider");
/**
 * 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:
 * 
 * https://trufflesuite.com/docs/truffle/reference/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 fs = require('fs');
// const mnemonic = fs.readFileSync(".secret").toString().trim();

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, 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)
      // },
      // Another network with more advanced options...
      // advanced: {
      // port: 8777,             // Custom port
      // network_id: 1342,       // Custom network
      // gas: 8500000,           // Gas sent with each transaction (default: ~6700000)
      // gasPrice: 20000000000,  // 20 gwei (in wei) (default: 100 gwei)
      // from: <address>,        // Account to send txs from (default: accounts[0])
      // websocket: true        // Enable EventEmitter interface for web3 (default: false)
      // },
      // Useful for deploying to a public network.
      // NB: It's important to wrap the provider as a function.
      // ropsten: {
      // provider: () => new HDWalletProvider(mnemonic, `https://ropsten.infura.io/v3/YOUR-PROJECT-ID`),
      // network_id: 3,       // Ropsten's id
      // gas: 5500000,        // 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)
      // skipDryRun: true     // Skip dry run before migrations? (default: false for public nets )
      // },
      // Useful for private networks
      // private: {
      // provider: () => new HDWalletProvider(mnemonic, `https://network.io`),
      // network_id: 2111,   // This network is yours, in the cloud.
      // production: true    // Treats this network as if it was a public net. (default: false)
      // }
    },
  
    // Set default mocha options here, use special reporters etc.
    mocha: {
      // timeout: 100000
    },
  
    // Configure your compilers
    compilers: {
      solc: {
        version: "0.8.13",      // 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"
        // }
      }
    },
    networks: { 
      development : {
        host: "127.0.0.1",
        port: "7545",
        network_id :"*" //match any network id
      },
      ropsten: {
        provider: function() {
          return new HDWalletProvider(process.env.PRIVATE_KEY, `https://ropsten.infura.io/v3/${process.env.INFURA_API_KEY}`)
        },
        network_id: 3,
        gas: 4000000 ,     //make sure this gas allocation isn't over 4M, which is the max
        networkCheckTimeout: 999999
    }
      
    },
  
  
    // Truffle DB is currently disabled by default; to enable it, change enabled:
    // false to enabled: true. The default storage location can also be
    // overridden by specifying the adapter settings, as shown in the commented code below.
    //
    // NOTE: It is not possible to migrate your contracts to truffle DB and you should
    // make a backup of your artifacts to a safe location before enabling this feature.
    //
    // After you backed up your artifacts you can utilize db by running migrate as follows:
    // $ truffle migrate --reset --compile-all
    //
    // db: {
      // enabled: false,
      // host: "127.0.0.1",
      // adapter: {
      //   name: "sqlite",
      //   settings: {
      //     directory: ".db"
      //   }
      // }
    // }
  };