https://taskfused.com/tags/payments/ Recent content in Payments on TaskFused.com Hugo en-us Sun, 18 Oct 2026 00:00:00 +0000 https://taskfused.com/payments-and-emails-with-taskfused-using-the-operation-id-as-the-idempotency-key/ Sun, 18 Oct 2026 00:00:00 +0000 https://taskfused.com/payments-and-emails-with-taskfused-using-the-operation-id-as-the-idempotency-key/ <p>A shop charges a customer&rsquo;s card when they confirm an order, then sends the receipt. The confirm button gets double-clicked, the request gets retried, and a worker might crash at any point. Two charges for one order is the one outcome that must never happen, and a second receipt is embarrassing.</p> <p>TaskFused already stops the double click and the retry from doing anything twice: they join the same operation. But it runs each operation at least once, and that leaves one gap. A worker can charge the card and then die before it saves &ldquo;done&rdquo;. The lease runs out, another worker takes the operation over, and that worker charges again. This post is about closing that gap.</p>