Your Payment Code Can Still Charge Twice (Even With Idempotency Keys)

A double charge is the payment bug customers actually notice. Two lines on a bank statement, an angry support ticket, and if it's handled badly, a dispute — which costs you a fee whether you win or not. Most engineers reach for idempotency keys, and they should. But idempotency keys stop duplicate requests. They don't stop your own system making... Weiterlesen