Price an order with business rules

Build the logic behind an order endpoint without touching a database. You will validate the request and reject invalid orders with a Throw Exception node, send an empty cart down its own 400 path with a Conditional, compute a subtotal with a Transform, then use a Switch to give VIP customers a discount. Test every path with the endpoint's test payload and inspect the generated backend code.

What you will build

• Validate the order and reject invalid requests
• Branch on a condition to refuse an empty cart
• Compute the subtotal with a Transform node
• Apply a VIP discount with a Switch node
• Test each path and inspect the generated code