From d0a0fe43e8c2354ee84782d6c425b6193fe9a5dd Mon Sep 17 00:00:00 2001
From: Chris Johnston <chris@thejohnstons.net>
Date: Fri, 30 Nov 2018 16:50:54 -0800
Subject: [PATCH] fix userid conversion

---
 src/Discord.Net.Core/Utils/TokenUtils.cs   | 9 +++++----
 test/Discord.Net.Tests/Tests.TokenUtils.cs | 1 +
 2 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/src/Discord.Net.Core/Utils/TokenUtils.cs b/src/Discord.Net.Core/Utils/TokenUtils.cs
index 8e533bcfa..f57a3ccac 100644
--- a/src/Discord.Net.Core/Utils/TokenUtils.cs
+++ b/src/Discord.Net.Core/Utils/TokenUtils.cs
@@ -1,4 +1,5 @@
 using System;
+using System.Text;
 
 namespace Discord
 {
@@ -41,10 +42,10 @@ namespace Discord
             try
             {
                 // decode the first segment as base64
-                var v = Convert.FromBase64String(segments[0]);
-                BitConverter.ToUInt64(v, 0);
-                // if no exception thrown, token is valid
-                return true;
+                var bytes = Convert.FromBase64String(segments[0]);
+                var idStr = Encoding.UTF8.GetString(bytes);
+                // discard id
+                return ulong.TryParse(idStr, out var id);
             }
             catch (FormatException)
             {
diff --git a/test/Discord.Net.Tests/Tests.TokenUtils.cs b/test/Discord.Net.Tests/Tests.TokenUtils.cs
index 1348b7744..317b8c719 100644
--- a/test/Discord.Net.Tests/Tests.TokenUtils.cs
+++ b/test/Discord.Net.Tests/Tests.TokenUtils.cs
@@ -138,6 +138,7 @@ namespace Discord
         [InlineData("MTk4NjIyNDgzNDcxOTI1MjQ4. this part is invalid. this part is also invalid", true)]
         [InlineData("MTk4NjIyNDgzNDcxOTI1MjQ4.", false)]
         [InlineData("MTk4NjIyNDgzNDcxOTI1MjQ4", false)]
+        [InlineData("NDI4NDc3OTQ0MDA5MTk1NTIw.xxxx.xxxxx", true)]
         // should not throw an unexpected exception
         [InlineData("", false)]
         [InlineData(null, false)]