NEM-sdk: Read Mosaics owned of a given account (Game Credits stored as Mosaic on the NEM Blockchain)

read_credits.js

console.log("Hello, NEMber");

// Configure a Blockchain endpoint and include SDK
var NEM_HOST = "http://bob.nem.ninja"; // bob is Testnet!
var NEM_PORT = 7890;
var nem  = require("nem-sdk").default;
var node = nem.model.objects.create("endpoint")(NEM_HOST, NEM_PORT);

// Issue the Mosaics request for the given Account (insert Player XEM address here)
nem.com.requests.account.mosaics(node, "TCTIMURL5LPKNJYF3OB3ACQVAXO3GK5IU2BJMPSU")
     .then(function(response)
     {
          var countPlayerCredits = 0;

          // Each row in the `response.data` array represents a different
          // Mosaic that the Account owns.
          for (var i in response.data) {
               var mosaic = response.data[i];

               // add a human-readable name for our console output
               var slug = mosaic.mosaicId.namespaceId + ":" + mosaic.mosaicId.name;

               console.log("Player has " + mosaic.quantity + " " + slug + " Mosaics");

               if ("evias.pacnem:heart" != slug)
                    continue; // not our Game Credits Mosaic.

               countPlayerCredits = mosaic.quantity;
          }

          console.log("Player has " + countPlayerCredits + " Game Credits for PacNEM!");
     },
     function(error) { // General Error OR wrong Network for Address OR No Mosaics available });