truffle.js

const HDWalletProvider = require("truffle-hdwallet-provider");
const LoomTruffleProvider = require("loom-truffle-provider");

const mnemonic = "YOUR MNEMONIC HERE";

module.exports = {
  networks: {
    development: {
      host: "127.0.0.1",
      port: 7545,
      network_id: "*",
      gas: 9500000,
    },

    mainnet: {
      provider: function () {
        return new HDWalletProvider(
          mnemonic,
          "https://mainnet.infura.io/v3/<YOUR_INFURA_API_KEY>"
        );
      },
      network_id: "1",
    },

    rinkeby: {
      provider: function () {
        return new HDWalletProvider(
          mnemonic,
          "https://rinkeby.infura.io/v3/<YOUR_INFURA_API_KEY>"
        );
      },
      network_id: 4,
    },

    loom_testnet: {
      provider: function () {
        const privateKey = "YOUR_PRIVATE_KEY";
        const chainId = "extdev-plasma-us1";
        const writeUrl = "wss://extdev-basechain-us1.dappchains.com/websocket";
        const readUrl = "wss://extdev-basechain-us1.dappchains.com/queryws";
        const loomTruffleProvider = new LoomTruffleProvider(
          chainId,
          writeUrl,
          readUrl,
          privateKey
        );
        loomTruffleProvider.createExtraAccountsFromMnemonic(mnemonic, 10);
        return loomTruffleProvider;
      },
      network_id: "9545242630824",
    },
  },
  compilers: {
    solc: {
      version: "0.4.25",
    },
  },
};