Idempotency Not Properly Enforced

[ob22a]

Summary

All post operations currently lack idempotency and this is more crucial in payment related operations. Payment-related operations currently lack properly enforced idempotency guarantees.

For financial operations, idempotency is critical to prevent duplicate charges, inconsistent application states, and reconciliation issues.

Problem

• Repeated requests (due to retries, network timeouts, or frontend resubmissions) may trigger unintended duplicate operations.
• Payment operations are not reliably protected by idempotency keys.
• There is no consistent validation of previously processed transactions before executing a new one.

Expected Behavior

• All payment requests should require and validate a unique idempotency key.
• Repeated requests with the same key should return the original response without reprocessing the transaction.
• The system should ensure atomicity between payment processing and state updates.

Impact

• Risk of duplicate charges
• Data inconsistency
• Financial reconciliation issues
• Increased operational and support burden