PayPal Adaptive Payments - 2012 Guide de l'utilisateur Page 24

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Introducing Adaptive Payments
Explicit Approval Payment Flow
24 August 7, 2012 Adaptive Payments Developer Guide
The following diagram shows the basic flow of control for a payment (such as payment for
items in a shopping cart at a web store) that requires the sender to log in to paypal.com to
approve the payment:
The following items correspond to the circled numbers in the diagram:
1. Your site or device sends a Pay request to PayPal on behalf of a sender.
2. PayPal responds with a key that you use when you direct the sender to PayPal.
3. You redirect your senders browser to paypal.com.
4. After the sender authorizes the transfer of funds, PayPal redirects your senders browser to
the location you specify.
NOTE: The cancel operation is not shown in the diagram. Cancellation is handled by a
separate cancellation URL to which PayPal redirects the senders browser any time
the sender cancels while on paypal.com.
In addition to these steps, PayPal notifies you and the sender of the payment.
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