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Separate event receipt, durable processing, and business effects so interruptions can be investigated safely.
A webhook endpoint that returns a healthy response can still leave business records out of date. The real job is to receive an event, establish whether it is trustworthy, preserve enough information to process it, and apply the intended effect without repeating that effect unnecessarily. Treat those as separate responsibilities.
Use events as observations
Moov’s webhook overview describes notifications for platform state changes and links to setup and signature-checking guidance. Review those current instructions for the actual implementation. Do not assume that knowing an endpoint URL proves that a request originated from Moov.
The architecture below is an editorial reliability pattern, not a claim about a particular delivery guarantee or retry schedule. Keep a durable event inbox with a provider event reference when supplied, receipt time, processing state, related object reference, and sanitized diagnostic information. Restrict access to payload content and apply an appropriate retention policy.
Separate receipt from business effects
A receiver should establish the event’s authenticity using the documented procedure before treating it as trusted input. The system then needs a durable handoff appropriate to its architecture. Acknowledgment must correspond to the current provider contract; do not copy an arbitrary response code or timeout from another service.
Downstream processing should have its own observable status. An event can be received successfully while a ledger update, customer notification, or internal projection fails. If all three operations are hidden inside one endpoint handler, an interrupted attempt becomes difficult to classify. Separate work records make it possible to retry the failed part without repeating every earlier effect.
Fictional worked example: the email service is down
Imagine Ash Bookings, a fictional platform that updates an order and sends an email when it observes a relevant payment change. During a tabletop exercise, the order update succeeds but the email service is unavailable. The original design marks the entire event failed and repeats the order update on every retry.
The revised plan gives the event-processing job and notification job separate records. The order projection can show that it already applied the relevant observation, while the email job remains pending investigation or retry under the application’s policy. An operator can tell which part is incomplete without guessing from the customer’s inbox.
The team also considers a repeated event and an older observation arriving after a newer one. It defines rules for deduplication and current-state recovery instead of assuming arrival order always matches business order. These are design scenarios, not assertions that Moov delivered those events in a test we performed.
Design an operator recovery view
Show received time, last processing attempt, related object, result category, and next permitted action. An operator should be able to distinguish an untrusted request, an unsupported event type, a transient processing failure, and a business-rule conflict. Each case needs a different response. A single red “webhook failed” badge is insufficient.
Make replay a controlled operation with an audit trail. Before replaying, identify which effects are safe to repeat and how the application recognizes work already completed. Avoid a button that blindly resubmits a financial action just because the original event handler encountered an unrelated error. Event recovery should normally recover state, not invent a new payment intent.
Webhook recovery checklist
- Implement the current official authenticity checks.
- Record receipt separately from downstream completion.
- Deduplicate meaningful business effects.
- Handle unexpected event types without corrupting state.
- Define stale-observation and current-state recovery rules.
- Keep sensitive payload data out of ordinary logs.
- Provide an audited recovery path with clear operator permissions.
Measure the gap that matters
Monitor the age of unprocessed work and the difference between observed provider state and application state, rather than celebrating only endpoint uptime. A system can accept every request while its worker queue is stalled. This playbook does not replace Moov’s delivery, authentication, or setup requirements; it helps your team ask whether an interruption leaves enough evidence to resume the intended work safely and explain what happened.