finished the protocol

client/Message.cs

@@ -1,5 +1,3 @@
-
-
 using System;
 using System.Collections.Generic;
 using System.Security.Cryptography;
@@ -54,16 +52,17 @@ public class Message
 
     public byte[] Bytes()
     {
+        // initialize a list
         List<byte> msg = [];
-        // 0..4
+        // 0..4 - message id
         msg.AddRange(BitConverter.GetBytes(Id));
-        // 4..12
+        // 4..12 - sender's phone number
         msg.AddRange(Utils.NumberToBytes(Sender));
-        // 12
+        // 12 - is this message an acknowledgement or a normal message
         msg.Add((byte)(IsAck ? 1 : 0));
-        // 13..(len - 32)
+        // 13.. the message itself (should be empty for an acknowledgement) 
         msg.AddRange(Encoding.UTF8.GetBytes(Content));
-
+        // Turn into array, prepending the version byte
         return [0, .. msg];
     }
 }