Convert Doxxxxx commands to a payment plug-in

To convert the DoPayment, DoDeposit, or DoRefund command to a payment plug-in:

1. Create a payment plug-in following instructions in Create a payment plug-in.
2. Move the Doxxxxx command logic that you use to communicate with the payment back-end system to the appropriate payment plug-in method:
   • Move the DoPayment code to the approve payment plug-in method
   • Move the DoDeposit code to the deposit payment plug-in method
   • Move the DoRefund code to the credit payment plug-in method
3. Make the task/policy command properties available to the payment plug-in as attributes in the interface value objects or as name-value pairs inside the payment protocol data (ExtendedData).
4. Ensure that the payment plug-in does not contain business policy logic. If special business policy code is required, it should be used before the Payment Rules logic is used.
5. If special configuration data is needed (such as external account information), use the plug-in deployment descriptor to define this data.

Related concepts

• DoPayment command versus plug-ins
• Extended data in payments or credits

Related tasks

• Packaging a payment plug-in

Related reference

• Payment plug-in specification
• Plug-in deployment descriptor example
• Payment business policies for Payment Rules

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