Blockchain webhooks notify an application when a service observes matching chain activity. Start by choosing the event and filter your feature needs, then inspect the documented payload and confirmation semantics. A notification is an observation to process. This guide introduces payload design; use the receiver implementation guide for delivery handling.
Choose the application action and source event
Start with the feature: update a balance screen, reconcile an order or create a review task. Then identify the event that can provide evidence for it. Native transfers, contract logs and transaction status observations differ. Confirm supported event types and filters for each network before treating a general webhook product as a fit.
Distinguish events from the delivery envelope
A delivery envelope can carry its own identifier, timestamp and authentication information. The observed chain activity may have transaction, block and log references. Preserve both kinds of fields. The delivery identifier supports receiving and deduplication, while chain references support later verification of the underlying activity.
Filter for the dataset your feature needs
Record the network, addresses, contracts, event signatures and asset scope required by the application. Test both matching and nonmatching examples. An overly broad filter creates unnecessary processing, while an overly narrow one can omit relevant activity. Keep filter versions with the consumer configuration so the scope of stored events is clear.
Separate observation from confirmation
A notification can describe recent activity that is still provisional. Follow the documented event semantics and the application’s confirmation policy before finalizing state. A transaction submission, a successful receipt and a confirmed payment order are different observations. Keep enough source references to check the relevant chain or API evidence.
Compare webhook delivery with application polling
Webhooks can reduce repeated requests when the application needs changes rather than continuous snapshots. Polling can still support reconciliation and a bounded backfill. Compare actual request volume, delivery behavior and recovery effort for your feature. Avoid a generic claim that one mechanism always costs less or cannot miss an observation.
Evaluate the complete event workflow
Use the Event Streams overview to confirm the documented scope. Inspect sample payloads, failure responses, retry behavior and replay coverage. Then implement the durable receiver and a recovery workflow before depending on events for application state.
Frequently Asked Questions
What is a blockchain webhook?
It is a notification delivered to an application when a service observes matching blockchain activity. The supported events, payload and confirmation semantics depend on the service and network.
Can one payload format erase differences between networks?
A normalized format can simplify application code, while chain-specific addresses, units, identifiers and finality still need clear meanings. Verify those fields for every required network.
Should I remove all RPC reads after adding webhooks?
Keep the reads needed to verify conflicting states, reconcile gaps or load snapshots. Use the event service’s documented replay capabilities together with a tested recovery path.