| Function | Description | |----------|-------------| | | Convert diverse client payloads (REST, gRPC, SOAP, GraphQL) into a canonical internal transaction model. | | Validation & Enrichment | Schema validation, business rule checks, and data enrichment (e.g., geolocation, customer tier). | | Idempotency Enforcement | Use client-provided idempotency keys to prevent duplicate processing of the same transaction. | | Routing & Load Balancing | Send transaction to appropriate service instance based on type, amount, region, or other attributes. | | Transaction Lifecycle Tracking | Maintain states: PENDING , PROCESSING , COMMITTED , FAILED , ROLLBACK , COMPENSATED . | | Retry & Dead-Letter Handling | Exponential backoff retries for transient failures; dead-letter queue for manual intervention. | | Observability | Emit traces, metrics (latency, success/fail rates), and structured logs per transaction. | | Security | Authentication (OAuth2, mTLS), authorization (RBAC/ABAC), encryption in transit and at rest. |
If you are looking at code, logs, or infrastructure diagrams, a tx gateway is the specific entry point or "door" through which valid transactions leave your system and enter the broader network (be it a blockchain, a bank, or a communication network). tx gateway