diff --git a/Client/Client.cs b/Client/Client.cs
index 17551de..5152afe 100644
--- a/Client/Client.cs
+++ b/Client/Client.cs
@@ -72,10 +72,10 @@ namespace Client
             Array.Copy(message, 1, payload, 0, message.Length - 1);
             switch (id)
             {
-                case 0x01:
+                case JSONConvert.LOGIN:
                     // json log in username data
                     break;
-                case 0x02:
+                case JSONConvert.MESSAGE:
                     // json message data
                     (string, string) combo = JSONConvert.GetUsernameAndMessage(payload);
                     string textUsername = combo.Item1;
@@ -84,11 +84,11 @@ namespace Client
 
                     break;
 
-                case 0x03:
+                case JSONConvert.LOBBY:
                     // lobby data
                     //TODO fill lobby with the data received
                     break;
-                case 0x04:
+                case JSONConvert.CANVAS:
                     // canvas data
                     break;
                 default:
diff --git a/Server/Models/ServerClient.cs b/Server/Models/ServerClient.cs
index b82e4f4..7544baf 100644
--- a/Server/Models/ServerClient.cs
+++ b/Server/Models/ServerClient.cs
@@ -91,7 +91,7 @@ namespace Server.Models
             switch(id)
             {
                 
-                case 0x01:
+                case JSONConvert.LOGIN:
                     // json log in username data
                     string uName = JSONConvert.GetUsernameLogin(message);
                     if (uName != null)
@@ -102,7 +102,7 @@ namespace Server.Models
                         
                     }
                     break;
-                case 0x02:
+                case JSONConvert.MESSAGE:
                     // json message data
                     (string, string) combo = JSONConvert.GetUsernameAndMessage(payload);
                     string textUsername = combo.Item1;
@@ -111,10 +111,10 @@ namespace Server.Models
                     // todo handle sending to all except this user the username and message to display in chat
                     break;
 
-                case 0x03:
+                case JSONConvert.LOBBY:
                     // lobby data
                     break;
-                case 0x04:
+                case JSONConvert.CANVAS:
                     // canvas data
                     // todo send canvas data to all other serverclients in lobby
                     break;
diff --git a/SharedClientServer/JSONConvert.cs b/SharedClientServer/JSONConvert.cs
index 1eb5c04..de853eb 100644
--- a/SharedClientServer/JSONConvert.cs
+++ b/SharedClientServer/JSONConvert.cs
@@ -7,6 +7,10 @@ namespace SharedClientServer
 {
     class JSONConvert
     {
+        public const byte LOGIN = 0x01;
+        public const byte MESSAGE = 0x02;
+        public const byte LOBBY = 0x03;
+        public const byte CANVAS = 0x04;
         public static (string,string) GetUsernameAndMessage(byte[] json)
         {
             string msg = Encoding.ASCII.GetString(json);
@@ -21,6 +25,11 @@ namespace SharedClientServer
             return payload.username;
         }
 
+        public static byte[] GetUsernameMessage(string username)
+        {
+
+        }
+
         /// <summary>
         /// constructs a message that can be sent to the clients or server
         /// </summary>