Aave FlashLoan.sol sample for Ropsten network truffle.js

truffle.js

var HDWalletProvider = require("truffle-hdwallet-provider");
var mnemonic = "mnemonic"
var ropsten = "https://ropsten.infura.io/v3/xxxxxxxxxxxx"

module.exports = {
  networks: {
    ropsten: {
      provider: function() {
        return new HDWalletProvider(
          mnemonic,
          ropsten
        );
      },
      network_id: 3,
      from: "0",
      gas: 470000
    }
  }
}