From 405c445093f84860a39162ebc55cb744a51c713d Mon Sep 17 00:00:00 2001
From: Rapptz <rapptz@gmail.com>
Date: Thu, 21 Apr 2022 03:19:11 -0400
Subject: [PATCH] [commands] Unwrap transformers when considering them as
 converters

---
 discord/ext/commands/core.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/discord/ext/commands/core.py b/discord/ext/commands/core.py
index 9d253aa9c..33801732a 100644
--- a/discord/ext/commands/core.py
+++ b/discord/ext/commands/core.py
@@ -161,6 +161,9 @@ def get_signature_parameters(
         if annotation is Greedy:
             raise TypeError('Unparameterized Greedy[...] is disallowed in signature.')
 
+        if isinstance(annotation, discord.app_commands.transformers._TransformMetadata):
+            annotation = annotation.metadata
+
         params[name] = parameter.replace(annotation=annotation)
 
     return params