Re: [webpayments] Registration: Should we support payee knowing user has payee-controlled payment app? (#112)

I believe it will be a useful feature for payee's to be able to interrogate the browser on the status of an installed app but only get a response if the app is from the same origin as the payee's website.

Example: 

If a user is on xyzstore.com the code on the website can issue a call like `navigator.payments.isAppRegistered("xyzstore.com")` and get a true or false however if the website calls `navigator.payments.isAppRegistered("example.com")` this will throw an error.


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Reply to this email directly or view it on GitHub:
https://github.com/w3c/webpayments/issues/112#issuecomment-194244487