fix: make payment event reduction monotonic

2026-08-23 21:34:59 +05:30
parent 98e0813061
commit fe44bc2091
11 changed files with 458 additions and 16 deletions
@@ -3,3 +3,5 @@
 Gateway-neutral, webhook-authoritative payments for WrNexus. Amounts are integer minor units. Every initialize and refund operation requires an idempotency key. The package never accepts or stores card numbers, CVVs, or expiry input; its components navigate to provider-hosted checkout.

 Built-in adapters: offline `sandbox`, Stripe, Razorpay, and PayPal. Applications may add adapters with `defineGateway`. Capabilities are explicit, unsupported operations are refused, signed webhooks are mandatory in production, and package-owned migrations provision the append-only event ledger.
+
+Webhook events are deduplicated by the provider's event ID and reduced in provider occurrence/sequence order. Captured and refund states are monotonic, so a delayed retry of an older event cannot regress a terminal payment.