truffle-config.js

// This enables us to use TypeScript in the unit tests.
require('ts-node/register');
const mnemonic = require('./secret.js');

var secrets = {
  secret: '',
  api_key: ''
}

const HDWalletProvider = require('truffle-hdwallet-provider');
//
// const fs = require('fs');
// const mnemonic = fs.readFileSync(".secret").toString().trim();
// if (process.env.NODE_ENV !== 'test') {
//   secrets = require("./secrets.json");
// }

module.exports = {
  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.
    //

    // 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])
      // websockets: 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.
    rinkeby: {
      provider: () => new HDWalletProvider(mnemonic, "https://rinkeby.infura.io/v3/ae145ebad7c8499db7901246fd1271f7"),
      network_id: 4,       // Rinkeby's id
      gas: 10000000,        // Rinkeby has a lower block limit than mainnet
      confirmations: 2,    // # of confs to wait between deployments. (default: 0)
      timeoutBlocks: 2000,  // # of blocks before a deployment times out  (minimum/default: 50)
      skipDryRun: true,    // Skip dry run before migrations? (default: false for public nets )
      gasPrice: 7000000000  // 7 gwei (in wei) (default: 100 gwei)
    },

    mainnet: {
      provider: () => new HDWalletProvider(mnemonic, "https://mainnet.infura.io/v3/ae145ebad7c8499db7901246fd1271f7"),
      network_id: 1,       // Mainnet id
      chain_id: 1,
      gas: 8000000,        // Ropsten has a lower block limit than mainnet
      confirmations: 2,    // # of confs to wait between deployments. (default: 0)
      timeoutBlocks: 2000,  // # of blocks before a deployment times out  (minimum/default: 50)
      skipDryRun: true,    // Skip dry run before migrations? (default: false for public nets )
      gasPrice: 7000000000  // 7 gwei (in wei) (default: 100 gwei)
    },
    // 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)
    // }
    kovan: {
      provider: () => {
        return new HDWalletProvider(mnemonic, "https://kovan.infura.io/v3/ae145ebad7c8499db7901246fd1271f7");
      },
      network_id: 42,
      gas: 6700000,
      gasPrice: 10000000000
    },
    ropsten: {
      provider: () => {
        return new HDWalletProvider(mnemonic, "https://ropsten.infura.io/v3/ae145ebad7c8499db7901246fd1271f7");
      },
      network_id: 3,
      gas: 6700000,
      gasPrice: 10000000000
    }
  },

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

  // Configure your compilers
  compilers: {
    solc: {
      version: "0.5.10",    // 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"
      }
    }
  }
}