상황
Illustrates how a bidder pays for a won auction item, including normal payment, retry on decline, refund processing by seller, and dispute handling.
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01
Use «include» from View Won Auctions to Make Payment to enforce payment as an integral step after winning.
02
Model retry on payment decline as an «extend» use case to keep the base payment flow clean.
03
Separate refund and dispute as seller-initiated use cases, with the payment gateway externalized as a system actor.
When modeling online marketplace or auction platforms that involve bidding, winning, and payment settlement with external payment services.