feat: add GIF sticker format

CHANGELOG.md

@@ -29,6 +29,8 @@ These changes are available on the `master` branch, but have not yet been releas
   ([#1859](https://github.com/Pycord-Development/pycord/pull/1859))
 - Added new `suppress_notifications` to `MessageFlags`.
   ([#1912](https://github.com/Pycord-Development/pycord/pull/1912))
+- Added GIF sticker format type to the `StickerFormatType` enum.
+  ([#1915](https://github.com/Pycord-Development/pycord/pull/1915))
 
 ### Changed
 
@@ -41,6 +43,8 @@ These changes are available on the `master` branch, but have not yet been releas
   `AttributeError`, and `io.BytesIO` files didn't send properly more than once.
   ([#1869](https://github.com/Pycord-Development/pycord/pull/1869) &
   [#1881](https://github.com/Pycord-Development/pycord/pull/1881))
+- Fixed an unhandled `KeyError` exception when receiving GIF stickers.
+  ([#1915](https://github.com/Pycord-Development/pycord/pull/1915))
 
 ## [2.3.2] - 2022-12-03
 

discord/enums.py

@@ -616,15 +616,18 @@ class StickerFormatType(Enum):
     png = 1
     apng = 2
     lottie = 3
+    gif = 4
 
     @property
     def file_extension(self) -> str:
         lookup: dict[StickerFormatType, str] = {
             StickerFormatType.png: "png",
             StickerFormatType.apng: "png",
             StickerFormatType.lottie: "json",
+            StickerFormatType.gif: "gif",
         }
-        return lookup[self]
+        # TODO: Improve handling of unknown sticker format types if possible
+        return lookup.get(self, "png")
 
 
 class InviteTarget(Enum):

docs/api/enums.rst

@@ -1643,6 +1643,12 @@ of :class:`enum.Enum`.
 
         Represents a sticker with a lottie image.
 
+    .. attribute:: gif
+
+        Represents a sticker with a gif image.
+
+        .. versionadded:: 2.4
+
 .. class:: InviteTarget
 
     Represents the invite type for voice channel invites.