billing-integration-safety

To handle duplicate Stripe webhooks, apply idempotent event processing with deduplication. This validates webhook signatures and ensures each billing event processes exactly once, preventing double activations or charges during out-of-order deliveries.

Webhook signature verification validates secure delivery to prevent tampered events. By cryptographically checking event payloads, it ensures billing updates and subscription state changes originate from the actual provider.

To sync subscription state between Stripe and your database, use transactional DB updates alongside an immutable billing audit trail. This applies atomic, audutable updates to local state and performs end-to-end reconciliation with periodic checks.

Yes, this billing integration approach supports grace-period dunning workflows. It manages failed payments without abrupt access loss by integrating dunning logic directly into the subscription state synchronization process.

State drift occurs between your billing provider and local database due to out-of-order webhook events and duplicate deliveries. Without idempotent processing and end-to-end reconciliation, local subscription state fails to match the provider.