Add Comparing price function

 var express = require('express');
-const lineToken = require('./apiKey.json');
+const Token = require('./apiKey.json');
 const request = require('request');const TARGET_URL = 'https://api.line.me/v2/bot/message/reply'
-const TOKEN = lineToken.line_token;
+const TOKEN = Token.line_token;
+const binanceKey = Token.binance_key;
 const fs = require('fs');
 const path = require('path');
 const HTTPS = require('https');
 const fetch = require('node-fetch');
+const rp = require('request-promise');
 const domain = "2018102235.oss2021.tk"
 const sslport = 23023;
 const bodyParser = require('body-parser');
@@ -31,8 +33,6 @@ app.post('/hook', function (req, res) {
         }
     }
 
-
-    
     res.sendStatus(200);
 });
 
@@ -54,6 +54,47 @@ function kimp(replyToken,message){
       return promise;
   } 
   korean_price().then(function(upbitPrice){
+    compare_price(replyToken, message, upbitPrice);
+  }); 
+}
+
+function compare_price(replyToken, message, upbitPrice){
+  var binancePrice = 0;
+  function binance_price(){
+    var promise = new Promise(function(resolve, reject){
+      const url = 'https://api.binance.com/api/v3/ticker/price?symbol='+message+'USDT';
+      const options = {method: 'GET', headers: {Accept: 'application/json'}};
+      const requestOptions = {
+        method: 'GET',
+        uri: 'https://pro-api.coinmarketcap.com/v1/cryptocurrency/listings/latest',
+        qs: {
+          'start': '1',
+          'limit': '10',
+          'convert': 'KRW'
+        },
+        headers: {
+          'X-CMC_PRO_API_KEY': binanceKey
+        },
+        json: true,
+        gzip: true
+      };
+      fetch(url, options)
+        .then(res => res.json())
+        .then(json => 
+          rp(requestOptions).then(response =>{
+            var i=0;
+            while(response.data[i].id !== 825){
+              i = i+1;
+            }
+            binancePrice = json.price*response.data[i].quote.KRW.price;
+            resolve(binancePrice);
+          })
+         ).catch(err => console.error('error:' + err));
+    });
+    return promise;
+  }
+
+  binance_price().then(function(binancePrice){
     request.post(
       {
           url: TARGET_URL,
@@ -65,8 +106,12 @@ function kimp(replyToken,message){
               "messages":[
                   {
                       "type":"text",
-                      "text":String(upbitPrice)
+                      "text":"binance : "+String(binancePrice.toFixed())+"원"
                   },
+                  {
+                    "type":"text",
+                    "text":"Upbit : "+String(upbitPrice)+"원"
+                }
               ]
           }
       },(error, response, body) => {
@@ -76,7 +121,6 @@ function kimp(replyToken,message){
   });
 }
 
-
 try {
     const option = {
       ca: fs.readFileSync('/etc/letsencrypt/live/' + domain +'/fullchain.pem'),