A modified version of the Facebook Messenger has revealed that person-to-person payment interfaces and other elements are already integrated into the app. The discovery was made by iOS developer Andre Aude.
Just like sending a message or sending a photo, Facebook’s payments implementation is integrated into the chat window. The idea being, that if you talk to a friend about getting coffee, you can pay your half of the bill in the same place. A history of payments appears in the settings pages.
Facebook has not confirmed that the feature is coming any time soon. Zuckerberg has floated the idea of Facebook tying mobile payments before, but warned it was a long way off.