Using Paypal iOS SDK with a Unity App

Is it possible to use the brand new Paypal iOS SDK with Unity?

I found it here: https://github.com/paypal/PayPal-iOS-SDK

It's pretty neat. It allows a user to make in app purchases via paypal, without leaving the app to go to a safari web page. The code for this is written in objective-c, so I'm wondering how I would make use of this cool paypal feature in a Unity app. Please let me know if you have any ideas.