this post was submitted on 05 Nov 2023
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Privacy
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GrapheneOS. Everything works, except Google Pay NFC payments. Luckily, my bank has Google Pay alternative and can be used for NFC payments, so I am good.
I am happy so far. Stable as hell.
Hmm, the lack of no Google pay has been a concern/consideration as I think toward moving to an alternate ROM like graphene. I could give up pretty much anything on my pixel but I love and use the hell out of contactless payments.
Any idea why nfc payments wouldn't work with Google pay but would with a bank app? Is a 3rd party privacy focused wallet technically feasible?
Android supports multiple payment providers. Some banks implement their own payment provider (e.g. Sparkasse in Germany), most just rely on Google Pay (now Google Wallet). Google Wallet has strict requirements for the Play Integrity API. Because of the modifications to Android that GrapheneOS is implementing, it is not eligible to receive the required integrity attestation and thus, Google Wallet is refusing to work. Google could at any point reconsider and certify/whitlelist GrapheneOS, which would allow Google Wallet to work using GrapheneOS. Likelihood close to 0.
Any banking app implementing their own payment provider is completely independent of this decision unless it also relies on Play Integrity API attestation (or a similar mechanism).
out of curiosity, are you aware what changes exactly make the Play Integrity API eligibility requirements not able to be met? with Google play installed, the compatibility layer should be able to facilitate the necessary communication, I would think.
or are they just arbitrarily saying anything that's not stock isn't eligible?