1{
2  "$schema": "http://json-schema.org/draft-07/schema#",
3  "title": "CheckoutCart",
4  "description": "Command to check out a shopping cart",
5  "type": "object",
6  "properties": {
7    "cartId": {
8      "description": "Unique identifier of the cart to check out",
9      "type": "string",
10      "format": "uuid"
11    },
12    "customerId": {
13      "description": "Identifier of the customer checking out",
14      "type": "string",
15      "format": "uuid"
16    },
17    "promotionCode": {
18      "description": "Optional promotion code to apply at checkout",
19      "type": "string"
20    }
21  },
22  "required": ["cartId", "customerId"]
23}
24