Merge branch 'v4' into v5

src/Nadeko.Medusa/Attributes/bot_owner_onlyAttribute.cs

@@ -0,0 +1,7 @@
+namespace Nadeko.Snake;
+
+[AttributeUsage(AttributeTargets.Method)]
+public sealed class bot_owner_onlyAttribute : MedusaPermAttribute
+{
+    
+}

src/NadekoBot/Common/Medusa/MedusaLoaderService.cs

@@ -434,6 +434,10 @@ public sealed class MedusaLoaderService : IMedusaLoaderService, IReadyExecutor,
                     else if (bp.ChannelPerm is { } cp)
                         cb.AddPrecondition(new BotPermAttribute(cp));
                 }
+                else if (ubp is bot_owner_onlyAttribute)
+                {
+                    cb.AddPrecondition(new OwnerOnlyAttribute());
+                }
             }
 
             cb.WithPriority(cmd.Priority);

src/NadekoBot/Services/Currency/CurrencyService.cs

@@ -88,6 +88,9 @@ public sealed class CurrencyService : ICurrencyService, INService
         long amount,
         TxData txData)
     {
+        if (amount == 0)
+            return true;
+        
         var wallet = await GetWalletAsync(userId);
         var result = await wallet.Take(amount, txData);
         if(result) 

src/NadekoBot/Services/Impl/StatsService.cs

@@ -7,7 +7,7 @@ namespace NadekoBot.Services;
 
 public sealed class StatsService : IStatsService, IReadyExecutor, INService
 {
-    public const string BOT_VERSION = "4.3.10";
+    public const string BOT_VERSION = "4.3.11";
 
     public string Author
         => "Kwoth#2452";