상황
Models a voucher redemption flow where users redeem vouchers, generating redemption orders that are paid through an integrated payment gateway supporting credit cards and wallets.
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01
Separating PaymentMethod as abstract class with concrete CreditCard and Wallet subclasses
02
Using enumerations for voucher, redemption, and payment statuses
03
Modeling PaymentGateway as a processor of PaymentTransaction with a dependency from RedemptionOrder
When designing or documenting the domain model for an OTT voucher redemption module with external payment processing.