We are using a mobile payment with a money transfer allowed between two banks as the scenario for this chapter. With the money transfer, the business logic is easy to understand. So, we do not need to worry about this part. Let's focus on the complexity of the architecture.
Money transfer between two different banks with different underlying implementations is hard. This is because we cannot directly apply the concept of traditional transactions to cope with external systems. The system is presented in the following diagram:
What are we not covering in this chapter?
The UI parts are out beyond scope of this book, so they are not available. The Receipt Generator and the Receipt Storage are optional. They are left for you to implement, if interested.
What do we implement and demonstrate...
