Stripe API: Double-Charging & The Concurrent Idempotency Race Condition
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Public Syllabus OverviewPayments & Concurrency · undefined
Stripe API: Double-Charging & The Concurrent Idempotency Race Condition: During mobile network drops, customers tapped "Pay $499" twice within 3 milliseconds. Both requests carried identical Idempotency Keys, yet both transactions settled successfully with Visa, double-charging the customer and costing $1.2M in merchant chargebacks.