{
  "type": "object",
  "properties": {
    "cart_id": {
      "type": "string"
    },
    "order_id": {
      "type": "string"
    }
  },
  "required": ["cart_id", "order_id"],
  "additionalProperties": true,
  "errorMessage": {
    "properties": {
      "cart_id": "Cart is invalid",
      "order_id": "Order is invalid"
    }
  }
}