#livermorebill_api
keen fogBOT
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cold grotto
hi
balmy tangle
hi! it can be possible to implement, you'd need to check the fingerprint of the PaymentMethod the user enters and compare it to a list of other fingerprints you've saved.
https://support.stripe.com/questions/how-can-i-detect-duplicate-cards-or-bank-accounts
cold grotto
I guess what I need is to intercept the payment before it's made.
Can fingerprints do it?
balmy tangle
yes, it's possible, it really depends how exactly you've integrated and the means and API calls you use to collect the customer's card details.
cold grotto
I found a new feature rule https://docs.stripe.com/radar/rules/supported-attributes#customers in the official docs, is there any way to implement it through that?
balmy tangle
I don't think that's really the same concept no
cold grotto
For example, my rule is that after a certain bank card has purchased a subscription with a trial more than 10 times, the next time he purchases it he is not allowed to purchase it anymore
balmy tangle
makes sense, but that's not something that's possible to express in Radar rules as far as I'm aware.
cold grotto
For example, my rule is that after a certain bank card has purchased a subscript...
Can fingerprints do it?
balmy tangle
yep
cold grotto
Create User -> Create Subscription -> Get Payment Connection -> Connection Provided to User
This is the processing flow in my project
So what part of the process do I need to add fingerprinting judgments to
balmy tangle
possibly the "Get payment connection" part? I'm not sure, that's super highlevel.
do you have some specific details like exact code you wrote and API calls you make and how you frontend collects the payment details?
balmy tangle
are you using Checkout in mode:"subscription"?
cold grotto
yes
balmy tangle
then unfortunately it's not really possible to easily implement this sort of thing since you don't have a way to see the fingerprint during the Checkout page; you could only act on it after (for example cancel the user's subscription and contact them to explain why, when handling the Checkout completed webhook if you detect the card fingerprint they entered was one you know already).
Alternativel you'd need to use a more custom flow using Elements where you can more directly interact with the payment flow but that's a lot of work
cold grotto
What does a customized process look like
balmy tangle
along the lines of https://docs.stripe.com/payments/accept-a-payment-deferred?platform=web&type=subscription but there's more to it which is not really documented well, for example you'd need to call https://docs.stripe.com/js/payment_methods/create_payment_method on the frontend so you can get the card object and look at its details like fingerprint before using it
keen fogBOT