Deserialising to error object if success object fails

[hubertgrzeskowiak]

In case of errors, most APIs will return an error JSON object describing details of what happened.
How would you go about getting that? My attempt looks very clunky (slightly rewritten to show the problem).

private fun parseResponse(response: ResponseBody): Either<FailureResponse, SuccessResponse> {
        return try {
            success(serializer.parse<SuccessResponse>(response))
        } catch (e1: KlaxonException) {
            // if planned success parsing failed, try parsing to a FailureResponse
            return try {
                failure(serializer.parse<FailureResponse>(response)))
            } catch (e2: KlaxonException) {
                failure(SerialisationFailure.fromException(e1))
            }
        } catch (e: IllegalArgumentException) {
            // Likely caused by Enum.valueOf() when deserializing to enums. Make sure enum is complete.
            failure(SerialisationFailure.fromException(e))
        }
    }