getWeb3.js

import Web3 from "web3";

export default function getWeb3() {
  console.log("getweb3 called");
  const web3 = new Web3(window.ethereum);
  return window.ethereum
    .enable()
    .then(() => {
      if (window.web3) {
        // Use Mist/MetaMask's provider.
        const web3 = window.web3;
        console.log("Injected web3 detected.");
        return web3;
      }
      // Fallback to localhost; use dev console port by default...
      const provider = new Web3.providers.HttpProvider("http://127.0.0.1:7545");
      const web3 = new Web3(provider);
      console.log("No web3 instance injected, using Local web3.");
      return web3;
    })

    .catch((err) => {
      console.log(err);
    });
}