https://learn.tanhdev.com/tags/payments/Recent content in Payments on Engineering Playbookhttps://learn.tanhdev.com/vesviet.pnghttps://learn.tanhdev.com/vesviet.pngHugoviSun, 16 Aug 2026 12:00:00 +0700https://learn.tanhdev.com/series/high-concurrency-systems/idempotency-api-design-payments/Tue, 09 Jun 2026 10:30:00 +0700https://learn.tanhdev.com/series/high-concurrency-systems/idempotency-api-design-payments/Ngăn chặn triệt để thảm họa trừ tiền khách hàng hai lần bằng cách cấy mã Idempotency Keys và Atomic Redis locks cho các giao dịch HTTP POST.