Error Handling and Exception Strategies with OneKhusa

When integrating with OneKhusa, it helps to distinguish what is an error from what is an exception. Here: an error is a structured response from the OneKhusa API, a non‑success HTTP status plus a body with codes, messages, and often correlation identifiers. An exception is something that happens before or around the API call: network failure, timeout, TLS error, or a failure to obtain an OAuth 2.0 access token. The distinction drives whether to retry, fix the request, or fix the configuration OneKhusa docs.

API errors come from OneKhusa endpoints. They are described under Errors and Responses in the docs. You get an HTTP status and a response body with structured error details. Parse the status and body, map them to your own error or exception types, and decide user correction, config change, or a controlled retry. Inspecting and handling each API error avoids “unknown” failures and wrong retry behaviour OneKhusa docs.

Exceptions are failures that occur before you get a normal API response. Examples: you cannot reach the API (DNS, network, TLS); the request times out; or the OAuth 2.0 token request fails. These are exceptions in the integration: handle them explicitly (e.g. throw or return a specific type), log them with context, and fix the cause before retrying, especially for auth failures. Updating configuration in the OneKhusa portal and then retrying is the right approach OneKhusa docs.

Idempotency matters when you retry after an exception. If you resubmit without reusing the same idempotency key, you risk duplicate payments or disbursements. OneKhusa supports idempotent operations: send a unique key per logical operation and reuse it for retries. Associating retries with the same key keeps “retry” from creating a second transaction OneKhusa docs.

Summary; 

1. Recognise - For each call, determine whether the result was an API error (parse status + body) or an exception (no response / token failure). 
2. Map - Map API errors and exceptions to your own types (e.g. validation error, declined, gateway unavailable, timeout, auth failure) so the app can branch appropriately. 
3. Log - Log errors and exceptions with enough context (and no secrets) to debug; the OneKhusa portal can be used alongside your logs. 
4. Surface to users -Present clear, actionable messages to users; keep raw error codes and stack traces in logs.

By treating OneKhusa’s errors and your integration’s exceptions as distinct, recognisable events, you can build reliable payment flows and avoid duplicate or incorrect handling.