remove redundancy

lib/wsapp.js

@@ -18,37 +18,31 @@ var subscriptions = {};
 
 var WsApp = function() {};
 
+WsApp._unauthorized = function() {
+  socket.emit('unauthorized');
+  socket.disconnect();
+};
+
 WsApp.start = function(server) {
   var self = this;
 
   var io = require('socket.io')(server);
 
   WalletService.onNotification(function(serviceInstance, args) {
-    var walletId = serviceInstance.walletId;
-    var copayerId = serviceInstance.copayerId;
-
-    io.to(walletId).emit('notification', args);
+    io.to(serviceInstance.walletId).emit('notification', args);
   });
 
-
   io.on('connection', function(socket) {
     socket.nonce = Uuid.v4();
     socket.emit('challenge', socket.nonce);
 
     socket.on('authorize', function(data) {
-      if (data.message != socket.nonce) {
-        socket.emit('unauthorized');
-        socket.disconnect();
-        return;
-      }
+      if (data.message != socket.nonce) return WsApp.unauthorized();
+
       WalletService.getInstanceWithAuth(data, function(err, res) {
-        var room = res.walletId;
-        if (err) {
-          socket.emit('unauthorized');
-          socket.disconnect();
-          return;
-        }
-        socket.join(room);
+        if (err) return WsApp.unauthorized();
+
+        socket.join(res.walletId);
         socket.emit('authorized');
       });
     });