Acceptance criteria:

• The payment bounded context has a new use case that allows to capture a one-time payment.

Implementation Details
This needs a number of changes, building on each other:

• Change configuration T361100: Adapt PayPal configuration to have two return URLS
• Add method to load Orders to PayPalPaymentIdentifierRepository T361102: Add a database method to find Orders by Order ID
• Add a captureOrder API method to the PaypalAPI interface and implementation. It should receive an order id (string) and call the "capture order" Paypal endpoint (see https://developer.paypal.com/docs/api/orders/v2/#orders_capture ) . It should return the id string from the purchase_units.payments.capture section of the response. This is the Transaction ID.
• Create use case (e.g. CapturePayPalPaymentUseCase or CapturePayPalOrderUseCase) in the payment bounded context. It should:
  • Receive an OrderID (string) as parameter
  • load the Order with the OrderId
  • call the CaptureOrder method of the API. This will return the transaction ID
  • add the transaction id to the order
  • store the order
  • If everything went well, return a success result object with the payment id and transaction id
  • If the API call failed, or something was not found in the database, return an error result object