biconomy sdk backend

app.ts

import Web3 from "web3";
import HDWalletProvider from "@truffle/hdwallet-provider";
import { Biconomy } from "@biconomy/mexa";

const infura = "https://goerli.infura.io/v3/f0493a02561f4419be93dde46cc584c6";
const pkey = "";

const main = async () => {
  console.log("start");
  let provider = new HDWalletProvider(pkey, infura);
  var web3 = new Web3(provider);
  let account = (await web3.eth.getAccounts())[0];
  console.log("account", account);

  const biconomy = new Biconomy(provider, {
    apiKey: "PxLkcX2mx.b90c27cc-3659-4c3d-9246-20a206e5bc13",
    debug: true,
    contractAddresses: ["0x6025735facb2e77eabb5f3bc9d80b7587e2df9f9"],
  });
  await biconomy.init();
  // console.log("biconomy object", biconomy.interfaceMap);
};


main();

Creating new private key on the fly then using it with HDwallet to pass provider to biconomy

const ethers = require("ethers");
const HDWalletProvider = require("@truffle/hdwallet-provider");
const Biconomy = require("@biconomy/mexa").Biconomy;

const main = async () => {
  // create a new private key using ethers
  const pkey = ethers.Wallet.createRandom().mnemonic.phrase;
  // create a new HDWalletProvider using the private key
  // to get eip-1193 compatible provider
  let provider = new HDWalletProvider(pkey, "https://rpc-mumbai.maticvigil.com");
  // create a new Biconomy instance
  const biconomy = new Biconomy(provider, {
    apiKey: "PxLkcX2mx.b90c27cc-3659-4c3d-9246-20a206e5bc13",
    debug: true,
    contractAddresses: ["0x6025735facb2e77eabb5f3bc9d80b7587e2df9f9"],
  });
  await biconomy.init();
};

main();