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Idempotency, retries & failure handlingMediumSDE-2

You receive payment webhooks from a provider. You see the same event delivered several times, and sometimes 'payment.failed' arrives after 'payment.captured'. How do you handle this?

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CREDPhonePeRazorpayStripe

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Answer out loud as you would in the room — clarify, give numbers, name the trade-off — then compare with the model answer.

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Design incoming webhook processing and reconciliation Lesson: Webhooks: sending and receiving reliably

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