fix: ensure add/del rxn ends up in the same bucket

src/Discord.Net.Rest/DiscordRestApiClient.cs

@@ -576,6 +576,7 @@ namespace Discord.API
             var ids = new BucketIds(channelId: channelId);
             return await SendJsonAsync<Message>("PATCH", () => $"channels/{channelId}/messages/{messageId}", args, ids, clientBucket: ClientBucketType.SendEdit, options: options).ConfigureAwait(false);
         }
+
         public async Task AddReactionAsync(ulong channelId, ulong messageId, string emoji, RequestOptions options = null)
         {
             Preconditions.NotEqual(channelId, 0, nameof(channelId));
@@ -587,7 +588,9 @@ namespace Discord.API
 
             var ids = new BucketIds(channelId: channelId);
 
-            await SendAsync("PUT", () => $"channels/{channelId}/messages/{messageId}/reactions/{emoji}/@me", ids, options: options).ConfigureAwait(false);
+            // @me is non-const to fool the ratelimiter, otherwise it will put add/remove in separate buckets
+            var me = "@me";
+            await SendAsync("PUT", () => $"channels/{channelId}/messages/{messageId}/reactions/{emoji}/{me}", ids, options: options).ConfigureAwait(false);
         }
         public async Task RemoveReactionAsync(ulong channelId, ulong messageId, ulong userId, string emoji, RequestOptions options = null)
         {
@@ -600,7 +603,8 @@ namespace Discord.API
 
             var ids = new BucketIds(channelId: channelId);
 
-            await SendAsync("DELETE", () => $"channels/{channelId}/messages/{messageId}/reactions/{emoji}/{userId}", ids, options: options).ConfigureAwait(false);
+            var user = CurrentUserId.HasValue ? (userId == CurrentUserId.Value ? "@me" : userId.ToString()) : userId.ToString();
+            await SendAsync("DELETE", () => $"channels/{channelId}/messages/{messageId}/reactions/{emoji}/{user}", ids, options: options).ConfigureAwait(false);
         }
         public async Task RemoveAllReactionsAsync(ulong channelId, ulong messageId, RequestOptions options = null)
         {

src/Discord.Net.Rest/Net/Queue/RequestQueue.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Concurrent;
 #if DEBUG_LIMITS
 using System.Diagnostics;