truffle.js

// For working with INFURA
const HDWalletProvider = require("truffle-hdwallet-provider")
const fs = require("fs")

// First read in the secrets.json to get our mnemonic
let secrets
let mnemonic
if(fs.existsSync("secrets.json")) {
  secrets = JSON.parse(fs.readFileSync("secrets.json", "utf8"))
  mnemonic = secrets.mnemonic
} else {
  console.log("No secrets.json found. If you are trying to publish EPM " +
              "this will fail. Otherwise, you can ignore this message!")
  mnemonic = ""
}



module.exports = {
  networks: {
    development: {
      host: "localhost",
      port: 8545,
      network_id: "*", // Match any network id

    },
    ropsten: {
      provider: new HDWalletProvider(mnemonic, "https://ropsten.infura.io/"),
      host: "localhost",
      port: 8545,
      network_id: 3,
    //  from: "0x0073a284FE9C6f9ad578F23E2397BF2fe6De59A1"

    },
    kovan: {
      host: "localhost",
      port: 8545,
      network_id: 42,
      from: "0x00C0d8F90F2c982A66d764aD025C0992F9B8d9c1"
    },
    mainnet: {
      host: "localhost",
      port: 8545,
      network_id: 1
    }
  }
};