In modern API integrations, it is important not only to send or receive data, but to ensure that all events are processed once, correctly and reliably. We implement an architecture with preserving intermediate states, retries mechanisms and message deduplication to eliminate losses and duplicates in working with external services and queues.
This is especially important when working with transactions, payment gateways, webhook events and background tasks, where one-time and completion are critical.
What is implemented
| Mechanism | Purpose and benefits |
|---|---|
| Save state | Ability to continue from the fault location or track processing progress |
| Automatic retries | Retry in case of error, with exponential delay |
| Deduplication | Protection against double processing of identical requests or events |
| Event IDs | Support for 'event _ id', 'message _ id', hash tracking |
| Deferred tasks | Try again later if external service is temporarily unavailable |
How does it work
1. An incoming request or event receives a unique identifier
2. The entry is added to the processing log (DB, Redis or Kafka)
3. In case of error, the task is queued for retry (with limit and control)
4. If the same event is received again, the system checks its ID and rejects the duplicate
5. All event history and processing status available for audit
API and Platform Benefits
Eliminates duplicates for network failures, repeated webhooks, or client errors
Reliable delivery even for temporary problems
Minimizing load on external APIs and databases
Accurate logging, auditing, and recovery
Scalability and flexibility for different scenarios (payments, bonuses, events)
Where especially important
Financial transactions, billing, deposits
Gaming events: bets, wins, settlements
Integrations with webhooks and slow APIs
Heavy load architectures with background tasks
States, retries, and deduplication are what make API integrations sustainable. We design logic so that even in conditions of failures and unstable connections, your data is safe, and processes are complete and without duplicates.