payment lines in payment facade

[Javier Marcon]

Hello, I'm trying to create a new payment gatewoy for Django-oscar to
pay using the mercadopago.com.ar But I'm not getting the best way to get
the lines when I implement the facade class. Should I pass to facade
self.request.user.id and retrieve the all_lines method from basket model
(from basket app) filtering by owner_id=self.user ? or there is a better
way to do it?

Thanks,

Javier.