aiogram/docs/dispatcher/class_based_handlers/pre_checkout_query.md

PreCheckoutQueryHandler

There is base class for callback query handlers.

Simple usage:

from aiogram.handlers import PreCheckoutQueryHandler

...

@router.pre_checkout_query()
class MyHandler(PreCheckoutQueryHandler):
    async def handle(self) -> Any: ...

Extension

This base handler is subclass of BaseHandler with some extensions:

• self.from_user is alias for self.event.from_user

Related pages

• BaseHandler
• PreCheckoutQuery
• Router.pre_checkout_query