Adding RPC endpoint support (Client.fetch_application) (#1536)

* Implement app_commands_badge in flags.py

* Update discord/flags.py

Co-authored-by: Dorukyum <53639936+Dorukyum@users.noreply.github.com>

* Fetch_application

* RPC endpoint

* Update discord/http.py

* Update discord/flags.py

* Fix

* move

* Update discord/client.py

* Update client.py

Co-authored-by: Dorukyum <53639936+Dorukyum@users.noreply.github.com>
Co-authored-by: Lala Sabathil <aiko@aitsys.dev>
Co-authored-by: Lala Sabathil <lala@pycord.dev>

discord/client.py

@@ -49,7 +49,7 @@
 
 from . import utils
 from .activity import ActivityTypes, BaseActivity, create_activity
-from .appinfo import AppInfo
+from .appinfo import AppInfo, PartialAppInfo
 from .backoff import ExponentialBackoff
 from .channel import PartialMessageable, _threaded_channel_factory
 from .emoji import Emoji
@@ -790,6 +790,30 @@ def users(self) -> List[User]:
         """List[:class:`~discord.User`]: Returns a list of all the users the bot can see."""
         return list(self._connection._users.values())
 
+    async def fetch_application(self, application_id: int, /) -> PartialAppInfo:
+        """|coro|
+        Retrieves a :class:`.PartialAppInfo` from an application ID.
+
+        Parameters
+        -----------
+        application_id: :class:`int`
+            The application ID to retrieve information from.
+
+        Raises
+        -------
+        NotFound
+            An application with this ID does not exist.
+        HTTPException
+            Retrieving the application failed.
+
+        Returns
+        --------
+        :class:`.PartialAppInfo`
+            The application information.
+        """
+        data = await self.http.get_application(application_id)
+        return PartialAppInfo(state=self._connection, data=data)
+
     def get_channel(self, id: int, /) -> Optional[Union[GuildChannel, Thread, PrivateChannel]]:
         """Returns a channel or thread with the given ID.
 

discord/http.py

@@ -2612,6 +2612,9 @@ def bulk_edit_guild_application_command_permissions(
     def application_info(self) -> Response[appinfo.AppInfo]:
         return self.request(Route("GET", "/oauth2/applications/@me"))
 
+    def get_application(self, application_id: Snowflake, /) -> Response[appinfo.PartialAppInfo]:
+        return self.request(Route('GET', '/applications/{application_id}/rpc', application_id=application_id))
+
     async def get_gateway(self, *, encoding: str = "json", zlib: bool = True) -> str:
         try:
             data = await self.request(Route("GET", "/gateway"))