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Tap, Tap, Charged Twice: The Idempotency-Key Pattern
A friend once messaged me, mildly furious, with a screenshot from his bank: the same $500 payment, twice, two seconds apart. He'd tapped "Pay," the app spun for a moment, nothing happened, so he tappe
yasir323.hashnode.dev13 min read
#idempotency#python#deduplication#api#api-design#distributed-systems#distributedsystems#payments#payment#payment-gateway#fintech#fintech-software-development#fastapi#postgresql#postgres#concurrency
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