![]() Payment gateway - the system that processes and verifies the Customers payment information. Shopping website - the website that the Customer is using to browse and purchase products. Please give me some advice and instructions on how to do it. The diagram contains these lifelines: Customer - the individual who is making a purchase on the online shopping website. like how we draw when we have several actors. ![]() I need just a guide on how to draw a complete checkout and make a purchase sequence diagram separately. I created a sequence diagram for login, but I don't know if I have to take authentication as an actor or not. I'm trying to sketch some use cases, but for example, when it comes to completing checkout, there are many actors, and I'm not sure how to do it when there are more actors. I googled and learned about sequencial diagrams, but I didn't find anything like this. For example, when I come to the checkout sequence diagram, I can assume that the procedure is done through view items, but in the view items sequence diagram, I must clearly draw the procedure sequence. An example of a high-level sequence diagram for online bookshop is given. According to this use case diagram, I have to draw a sequence diagram for each use case except login by making an assumption. The sequence diagram represents the flow of messages in the system and is also. ![]()
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