Payment / Checkout Sequence Diagram
This payment sequence diagram maps checkout from order placement through card authorization. It also shows the downstream fulfilment handoff after payment confirmation, which helps separate payment concerns from warehouse work.
Diagram source
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title: Checkout and Payment
Customer -> Store: Place order
Store ->> Payments: Charge card
Payments ->> Bank: Authorize
Bank --> Payments: Approved
Payments --> Store: Payment confirmed
Store --> Customer: Order confirmed
Store ->> Warehouse: Fulfil order