How close is Apple Pay? Is there anything in an Apple Pay transaction identifying the customer (that can be correlated across purchases)? I've heard good thing

How close is Apple Pay? Is there anything in an Apple Pay transaction identifying the customer (that can be correlated across purchases)? I've heard good things but I have no idea about the details. Edit: https://www.engadget.com/2014/10/02/apple-pay-an-in-depth-look-at-whats-behind-the-secure-payment/ https://www.engadget.com/2014/10/02/apple-pay-an-in-depth-lo... merchant sees NO account information but has the final four digits of the PAN [CC number] as an account identifier to use as a mechanism for tracking volume/activity per account