yilber_api | Stripe Developers | Page 1

neat muralBOT Nov 25, 2024, 9:53 PM

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yilber_api, 5 hours ago, 4 messages

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full galleon Nov 25, 2024, 9:53 PM

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Hi there

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Can you provide more context? How are you collecting the new card?

twin hull Nov 25, 2024, 9:55 PM

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I use the CardCvcElement,
CardExpiryElement,
CardNumberElement from react stripe

full galleon Nov 25, 2024, 9:56 PM

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And you're using these values to create a PaymentMethod? https://docs.stripe.com/js/payment_methods/create_payment_method_elements

twin hull Nov 25, 2024, 9:56 PM

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yes

full galleon Nov 25, 2024, 9:57 PM

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Got it. In that case, you should inspect the PaymentMethod server side and look at its fingerprint, then use this to compare with existing cards

twin hull Nov 25, 2024, 9:58 PM

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But is a fingerprint created before creating the payment method?

full galleon Nov 25, 2024, 9:59 PM

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No, the fingerprint only exists once the PaymentMethod is created

twin hull Nov 25, 2024, 10:00 PM

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Will the card number being added have the same fingerprint as an existing card with the same number?

full galleon Nov 25, 2024, 10:00 PM

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Yes

twin hull Nov 25, 2024, 10:02 PM

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But I still don’t fully understand. Should I add the card first and then compare? Wouldn’t that cause duplication, which is what I want to avoid?

full galleon Nov 25, 2024, 10:10 PM

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You'll need to create the PaymentMethod first before you can review the fingerprint. Creating the PaymentMethod doesn't mean you have to attach it to a customer. You should be able to compare the fingerprint of the newly-created PM with the fingerprints you have for the existing PMs then decide whether to prompt the customer for a new PM

twin hull Nov 25, 2024, 10:16 PM

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So, the payment method I just created isn’t stored anywhere if I don’t link it to a customer? Or should I perform some kind of deletion?

full galleon Nov 25, 2024, 10:19 PM

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It's on your account but can only be used once: for a single payment or to attach it to a customer. If you don't attach it to a customer, it can still be used for a payment

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There's no way to delete a PaymentMethod but you can just ignore it/not use it

#yilber_api