The requirement is to implement a flexible mechanism for fraud checks where the rules can change frequently. The Kyma runtime's Serverless component is the ideal choice for this use case. It allows developers to create and deploy functions, which are small, independent, and event-driven pieces of code. This decouples the fraud check logic from the core application. When business rules for fraud detection change, only the specific function needs to be updated and redeployed, providing the required flexibility without impacting the entire order placement process.

A. BAPI: A BAPI (Business Application Programming Interface) is a standardized interface for SAP business objects, typically within an ABAP system, not a native Kyma runtime component for implementing custom logic.

B. Service catalog: The service catalog in Kyma is used to discover, provision, and bind to backing services (like databases or messaging systems), not for executing custom, flexible business logic.

C. Application connector: The application connector is responsible for establishing a secure connection between the Kyma runtime and an external SAP system, enabling eventing and API consumption, but it does not execute the business logic itself.

1. SAP Help Portal

SAP Business Technology Platform: In the section on the Kyma environment

Serverless is described as the component for building event-driven applications using Functions. It states

"With Serverless in Kyma

you can build event-driven and serverless applications. You can create Functions which are stateless

and you can trigger them with Events or HTTP calls." This directly supports implementing a flexible

event-triggered fraud check. (SAP Help Portal

Kyma Environment -> Develop -> Serverless).

2. Kyma Project Documentation: The official open-source documentation for Kyma

which is the foundation of the SAP BTP

Kyma runtime

describes Functions as a way to "extend your applications with custom logic." This aligns with the use case of adding a custom fraud check. (kyma-project.io

Documentation -> Components -> Serverless).

3. SAP Help Portal

SAP Business Technology Platform: The documentation for the Application Connector explains its purpose: "The Application Connector is a component that allows you to connect applications and expose their APIs and Events in the Kyma runtime." This clarifies its role is connectivity

not logic execution. (SAP Help Portal

Kyma Environment -> Extend -> Application Connector).