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docs/dispatcher/class_based_handlers/message.rst

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+==============
+MessageHandler
+==============
+
+There is base class for message handlers.
+
+Simple usage
+============
+
+.. code-block:: python
+
+    from aiogram.handlers import MessageHandler
+
+    ...
+
+    @router.message()
+    class MyHandler(MessageHandler):
+        async def handle(self) -> Any:
+            return SendMessage(chat_id=self.chat.id, text="PASS")
+
+Extension
+=========
+
+This base handler is subclass of [BaseHandler](basics.md#basehandler) with some extensions:
+
+- :code:`self.chat` is alias for :code:`self.event.chat`
+- :code:`self.from_user` is alias for :code:`self.event.from_user`