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결제 전환 목표 아키텍처 정의 (2/2) (iss-5a912ed79baf)
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```mermaid
sequenceDiagram
participant User as 유저
participant PaymentService as 결제 서비스
participant PaymentGateway as 결제 게이트웨이
participant Database as 데이터베이스
User->>PaymentService: 결제 요청
PaymentService->>Database: 결제 정보 저장
activate Database
Database-->>PaymentService: 저장 완료
deactivate Database
alt 정상 흐름
PaymentService->>PaymentGateway: 결제 요청
activate PaymentGateway
PaymentGateway-->>PaymentService: 결제 성공
deactivate PaymentGateway
PaymentService->>User: 결제 완료
else 외부 실패
PaymentService->>PaymentGateway: 결제 요청
activate PaymentGateway
PaymentGateway-->>PaymentService: 결제 실패
deactivate PaymentGateway
PaymentService->>Database: 롤백
activate Database
Database-->>PaymentService: 롤백 완료
deactivate Database
PaymentService->>User: 결제 실패
end
else DB 실패
PaymentService->>Database: 결제 정보 저장
activate Database
Database-->>PaymentService: 저장 실패
deactivate Database
PaymentService->>User: 저장 실패
end
```