New customer purchases Sky subscription using Direct Debit payment method

This guide details the journey for a new customer subscribing to Sky using Direct Debit. You'll find both the customer-facing flow and system-level sequence, complete with API endpoint paths and CRM/contract event mappings. Use it to align the UX journey with backend specifications — and contact us if you’d like enhanced Postman or Swagger definitions for integration testing.

Customer perspective

%%{init: {
"theme": "neutral",
"look": "classic"
}}%%
flowchart TD
    A([Start]) --> B{Username exists}
    B -- Yes --> C[Route to existing login]
    B -- No --> D[Register customer]

    D --> E[Validate VCN]
    E --> F[View catalogue by country and itemType Subscription]
    F --> G[Create Direct Debit payment method]
    G --> H[Add items to cart]
    H --> I[Checkout cart]
    I --> J([End])

System perspective

%%{init: {
"theme": "neutral",
"look": "classic"
}}%%
sequenceDiagram
    participant C as Customer
    participant W as Web
    participant CRS as CustomerRegistrationService
    participant CAS as ConditionalAccessService
    participant Cat as CatalogueService
    participant Pay as PaymentService
    participant Cart as CartService

    C->>W: Start
    W->>CRS: queryIfUserNameExists
    alt Username exists
        W-->>C: Route to existing customer log in
    else Username not found
        W->>CRS: registerCustomer
        CRS-->>W: success

        W->>CAS: Validate VCN
        Note right of CAS: Capture first line of address,<br/>postcode and viewing card number<br/>for Sky validation
        CAS-->>W: VCN validated

        W->>Cat: getCatalogue
        Cat-->>W: catalogue items (filtered by country and itemType)

        W->>Pay: createPaymentMethod
        Pay-->>W: Direct Debit payment method created

        W->>Cart: addItemsToCart
        Note right of Cart: VCN must be provided
        Cart-->>W: items added

        W->>Cart: checkoutCart
        Cart-->>W: checkout complete
    end

    W-->>C: End