Is there a way to validate Firebase registration tokens on my server without making a round trip to Firebase servers? I just want to know if they are valid, not necessarily active.
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Why do you need to know? – Doug Stevenson Dec 09 '18 at 23:44
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As crazy as it may sound, it's part of the authentication strategy. – Raj Chaudhary Dec 10 '18 at 04:54
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Anonymous authentication to be more precise. – Raj Chaudhary Dec 10 '18 at 04:55
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Possible duplicate of [Firebase Cloud Messaging - How to validate Tokens?](https://stackoverflow.com/questions/38442434/firebase-cloud-messaging-how-to-validate-tokens) – Cisco Dec 10 '18 at 11:52
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@FranciscoMateo - not a duplicate as I want to validate it without making network calls to Firebase servers – Raj Chaudhary Dec 10 '18 at 13:10
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Retracted vote to close. – Cisco Dec 10 '18 at 14:06
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There is currently no way to validate tokens on your own.
I presume that you intend to validate it by checking the format, which would be unadvisable. Token formats have the tendency to change as Google wants it too.
AL.
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