Registering transactions on website:

Hi,
we are some students trying to integrate Apple Pay on a website; in such a manner that every transactions is registered and displayed.
Simultanously an arduino should recieve the same transaction from Apple Pay. The intention is to observe stock/inventory and consumer tendencies for the retailer.
While most of the website is done, not having a software savvy student makes the project a bit challenging to integrate (we are mechatronic students).


So if anyone could lead us along the correct path of implementing the API unto website and hardware (such as resperry pi/ arduino)? Or might know of projects/examples doing so?


- Thanks in advance