get ticker working with ccxt

ExchangeAPI.js

@@ -1,8 +1,9 @@
-exports.newExchangeAPI = function newExchangeAPI(logger, exchangeName) {
+exports.newExchangeAPI = function newExchangeAPI(logger, BOT) {
   
     let MODULE_NAME = "Exchange API";
     let LOG_INFO = true;
     let apiClient;
+    let bot = BOT
 
     let thisObject = {
         initialize: initialize,
@@ -14,11 +15,41 @@
         getMaxDecimalPositions: getMaxDecimalPositions
     };
 
+    let exchangeId
+    let options = {}
+    let exchange
+    const symbol = bot.market.baseAsset + '/' + bot.market.quotedAsset
+    const ccxt = require('ccxt')
+
     return thisObject;
 
     function initialize(callBackFunction) {
+        try { 
+        exchangeId = bot.exchange.toLowerCase()
 
-        callBackFunction(global.DEFAULT_OK_RESPONSE);
+        let key = process.env.KEY
+        let secret = process.env.SECRET
+
+        if (key === "undefined") { key = undefined }
+        if (secret === "undefined") { secret = undefined }
+
+        const exchangeClass = ccxt[exchangeId]
+        const exchangeConstructorParams = {
+            'apiKey': key,
+            'secret': secret,
+            'timeout': 30000,
+            'enableRateLimit': true,
+            verbose: false,
+            options: options
+        }
+
+        exchange = new exchangeClass(exchangeConstructorParams)
+
+        callBackFunction(global.DEFAULT_OK_RESPONSE)
+    } catch (err) {
+            logError("initialize -> err = " + err.message);
+        callBackFunction(global.DEFAULT_FAIL_RESPONSE);
+    }
     }
 
     function getMaxDecimalPositions() {
@@ -34,13 +65,22 @@
      *           last Number
      *       };
      */
-    function getTicker(pMarket, callBack) {
+    async function getTicker(pMarket, callBackFunction) {
         try {
             logInfo("getTicker -> Entering function.");
-            apiClient.getTicker(pMarket, callBack);
+            let ticker
+
+            if (exchange.has['fetchTicker']) {
+                ticker = await (exchange.fetchTicker(symbol)) 
+                callBackFunction(global.DEFAULT_OK_RESPONSE, ticker)
+            } else {
+                logError("getTicker -> Exchange does not support fetchTicker command.");
+                callBackFunction(global.DEFAULT_FAIL_RESPONSE);
+            }
+            
         } catch (err) {
             logError("getTicker -> err = " + err.message);
-            callBack(global.DEFAULT_FAIL_RESPONSE);
+            callBackFunction(global.DEFAULT_FAIL_RESPONSE);
         }
     }