Re: [webpayments] [Architecture] Payment App is a term used in EMV to describe the applet stored in SC (#31)

Also worth mentioning is that in my view a "Payment App" is *not* a PSP or a Bank -- and it seems like there has been some conflation here or there with those concepts. A Payment App is just a piece of software that helps users register payment instruments/funding sources and then use them (eg: send them/specify them to a PSP) to make a payment. A Payment App specifies the payment schemes/methods it supports and then this can be matched against payment requests by the payment mediator to simplify user selection.

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https://github.com/w3c/webpayments/issues/31#issuecomment-163368287