web3.js

const Web3 = require("web3");


let web3;
const apiLink = "https://rinkeby.infura.io/v3/4b6cf47f5f6e4aca850c45c04a58cf0d";

if (typeof window !== 'undefined' && typeof window.web3 !== 'undefined') {
    // we are in the browser and metamask is running
    web3 = new Web3(window.web3.currentProvider);
  } else {
    // we are on the server or user is not running metamask
    // set up our own provider that works through infura
    const provider = new Web3.providers.HttpProvider(apiLink
      // pass url of remote node
      // 'https://mainnet.infura.io/v3/4b6cf47f5f6e4aca850c45c04a58cf0d'
    );
    web3 = new Web3(provider);
  }


  module.exports = web3;