{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "#/components/schemas/Addon",
  "title": "Addon",
  "description": "Array consisting of add-ons selected by the consumer, may be empty",
  "properties": {
    "external_id": {
      "description": "The ID provided by the TMS",
      "type": "string"
    },
    "price": {
      "description": "The price of the add-on",
      "enum": [
        null
      ],
      "format": "int64",
      "minimum": 0,
      "type": "integer"
    },
    "type": {
      "description": "The type of the add-on, e.g. sms or entry-code",
      "type": "string"
    },
    "user_input": {
      "description": "The text provided by the user",
      "type": "string"
    }
  },
  "required": [
    "price",
    "type"
  ],
  "type": "object"
}