Get Cryptocurrency Prices from Binance

app.js

const express = require("express");
const app = express();
const axios = require("axios");

app.get("/", async (req, res) => {
  let BTC = "https://api.binance.com/api/v3/ticker/price?symbol=BTCUSDT";
  let ETH = "https://api.binance.com/api/v3/ticker/price?symbol=ETHUSDT";
  let LTC = "https://api.binance.com/api/v3/ticker/price?symbol=LTCUSDT";
  let XRP = "https://api.binance.com/api/v3/ticker/price?symbol=XRPUSDT";

  const promise1 = axios.get(BTC);
  const promise2 = axios.get(ETH);
  const promise3 = axios.get(LTC);
  const promise4 = axios.get(XRP);

  const responses = await axios.all([promise1, promise2, promise3, promise4]);
  let prices = {
    Bitcoin: responses[0].data.price,
    Ethereum: responses[1].data.price,
    Litecoin: responses[2].data.price,
    Ripple: responses[3].data.price
  };
  console.log(prices);
});

const listener = app.listen(process.env.PORT, () => {
  console.log("Your app is listening on port " + listener.address().port);
});