spring-architecture-converge-1783828654/docs/architecture/transaction-sequence.md

sequenceDiagram participant User participant Payment Gateway participant Database participant Service

User->>Service: Initiate Payment
Service->>Payment Gateway: Send Payment Request
alt Successful Payment
    Payment Gateway-->>Service: Confirm Payment
    Service->>Database: Record Payment
    Database-->>Service: Payment Recorded
    Service-->>User: Payment Success
else External Payment Failed
    Payment Gateway-->>Service: Payment Failed
    Service-->>User: Payment Failed
else Database Failure
    Service->>Database: Attempt to Record Payment
    Database-->>Service: Database Error
    Service-->>User: Unable to process payment
end
Service->>Database: Commit
alt Rollback Required
    Database->>Database: Rollback Changes
end