Videos / System Design

Episode 6 of 9 · Stripe

Exactly-once: the outbox, the retry chain, and reconciliation

Chapters

1. The guarantee nobody sells0:00
2. Two writes, one crash0:21
3. The outbox0:41
4. The consumer contract1:01
5. Undo, not a lock1:23
6. Reconciliation, the last line1:48
7. Payoff2:13

Exactly-once: the outbox, the retry chain, and reconciliation. Last episode, one endpoint became safe to retry. But a payment is not one endpoint. It touches fraud, the ledger, balances and notifications, and every wire between them can lose a

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