requested changes

aiogram/dispatcher/dispatcher.py

@@ -188,7 +188,8 @@ class Dispatcher(Router):
         :return:
         """
         try:
-            update_type, event = update.content()
+            update_type = update.event_type
+            event = update.event
         except UpdateTypeLookupError:
             warnings.warn(
                 "Detected unknown update type.\n"

aiogram/types/update.py

@@ -1,6 +1,7 @@
 from __future__ import annotations
 
-from typing import TYPE_CHECKING, Optional, Tuple
+import functools
+from typing import TYPE_CHECKING, Callable, Optional, TypeVar, cast
 
 from .base import TelegramObject
 
@@ -15,6 +16,12 @@ if TYPE_CHECKING:  # pragma: no cover
     from .pre_checkout_query import PreCheckoutQuery
     from .shipping_query import ShippingQuery
 
+T = TypeVar("T")
+
+
+def lru_cache(func: Callable[..., T]) -> T:
+    return functools.lru_cache()(func)  # type: ignore
+
 
 class Update(TelegramObject):
     """
@@ -54,44 +61,51 @@ class Update(TelegramObject):
     chat_member: Optional[ChatMemberUpdated] = None
     """*Optional*. A chat member's status was updated in a chat. The bot must be an administrator in the chat and must explicitly specify 'chat_member' in the list of *allowed_updates* to receive these updates."""
 
-    def content(self) -> Tuple[str, TelegramObject]:
-        """
-        Detect content type
+    def __hash__(self) -> int:
+        return hash((type(self), self.update_id))
 
-        Return update type and content
+    @property  # type: ignore
+    @lru_cache
+    def event_type(self) -> str:
+        """
+        Detect update type
         If update type is unknown, raise UpdateTypeLookupError
 
         :return:
         """
         if self.message:
-            return "message", self.message
+            return "message"
         if self.edited_message:
-            return "edited_message", self.edited_message
+            return "edited_message"
         if self.channel_post:
-            return "channel_post", self.channel_post
+            return "channel_post"
         if self.edited_channel_post:
-            return "edited_channel_post", self.edited_channel_post
+            return "edited_channel_post"
         if self.inline_query:
-            return "inline_query", self.inline_query
+            return "inline_query"
         if self.chosen_inline_result:
-            return "chosen_inline_result", self.chosen_inline_result
+            return "chosen_inline_result"
         if self.callback_query:
-            return "callback_query", self.callback_query
+            return "callback_query"
         if self.shipping_query:
-            return "shipping_query", self.shipping_query
+            return "shipping_query"
         if self.pre_checkout_query:
-            return "pre_checkout_query", self.pre_checkout_query
+            return "pre_checkout_query"
         if self.poll:
-            return "poll", self.poll
+            return "poll"
         if self.poll_answer:
-            return "poll_answer", self.poll_answer
+            return "poll_answer"
         if self.my_chat_member:
-            return "my_chat_member", self.my_chat_member
+            return "my_chat_member"
         if self.chat_member:
-            return "chat_member", self.chat_member
+            return "chat_member"
 
         raise UpdateTypeLookupError("Unknown update type")
 
+    @property
+    def event(self) -> TelegramObject:
+        return cast(TelegramObject, getattr(self, self.event_type))
+
 
 class UpdateTypeLookupError(LookupError):
     pass