marked/DeviceReachabilityStatus/code/API_definitions/device-reachability-status-subscriptions/raw.md

# device-reachability-status-subscriptions

```yaml
openapi: 3.0.3
info:
  title: Device Reachability Status Subscriptions
  description: |
    This API provides the API consumer with the ability to subscribe to Reachability status events.

    # Introduction

    ## Reachability Status
    API consumer is able to be notified whether the reachability status of a certain user device has changed to either data- or sms-usage.
    This capability is provided via a subscription  request - in this case the reachability situation is part of the event notification, which is sent back to the event subscriber when reachability situation has changed.

    # Relevant terms and definitions

    * **Device**: A device refers to any physical entity that can connect to a network and participate in network communication.

        At least one identifier for the device out of four options must be provided: IPv4 address, IPv6 address, Phone number, or Network Access Identifier assigned by the mobile network operator for the device. Where more than one device identifier is provided, only one identifier will be selected by the implementation and this choice indicated to the API consumer in the session creation response.

        Note: Network Access Identifier is defined for future use and will not be supported with this version of the API.

    # API Functionality

    The API exposes following capability:

    ## Device reachability status subscription

    These endpoints allow to manage event subscription on reachability device status event.
    The CAMARA subscription model is detailed in the CAMARA API design guideline document and follows CloudEvents specification.

    When subscribing, it is mandatory to provide the event `types` you are subscribing to, as multiple subscription-types are managed by this API.

    Following event ``types`` are managed for this API:
      - ``org.camaraproject.device-reachability-status-subscriptions.v0.reachability-data``: Event triggered when the device is connected to the network for Data usage (regardless of the SMS reachability).

      - ``org.camaraproject.device-reachability-status-subscriptions.v0.reachability-sms``: Event triggered when the device is connected to the network only for SMS usage

      - ``org.camaraproject.device-reachability-status-subscriptions.v0.reachability-disconnected``: Event triggered when the device is not connected.

    Note: Additionally, the following events could be sent, which do not require a dedicated subscription:
      - `org.camaraproject.device-reachability-status-subscriptions.v0.subscription-started` is sent when the subscription starts.
      - `org.camaraproject.device-reachability-status-subscriptions.v0.subscription-updated` is sent when the subscription is updated.
      - `org.camaraproject.device-reachability-status-subscriptions.v0.subscription-ended` is sent when the subscription ends.

    It is used in following cases:
      - the subscription expire time (optionally set by the requester) has been reached
      - the maximum number of subscription events (optionally set by the requester) has been reached
      - the subscription was deleted by the requester
      - the Access Token `sinkCredential` (optionally set by the requester) expiration time has been reached
      - the API server has to stop sending notification prematurely

    **Note on combined usage of ``initialEvent`` and ``subscriptionMaxEvents``**:

    If an event is triggered following ``initialEvent`` set to true,
    this event will be counted towards ``subscriptionMaxEvents`` (if provided).

    **Clarification on ``initialEvent`` & ``event-type`` behaviour:**

    Following table illustrate behaviour regarding event triggering depending on **initial** reachability state of the device:

    | subscribed event-type | device reachability status at subscription time | event sent if ``initialEvent`` set to true | Explanation |
    | ----------------------| ------------- | --------------- | ---------------|
    | reachability-data  | Device can use data |   Yes | The device is reachable for data, so the event is triggered. |
    | reachability-data  | Device is disconnected or SMS-only | No | The device cannot use data, so no event is sent. |
    | reachability-sms  | Device can use data | No | The device can use data, but for thids event is only for SMS. |
    | reachability-sms  |  Device is SMS-only | Yes | The device supports SMS, so the event is triggered. |
    | reachability-sms  | Device is disconnected | No | The device cannot send SMS, so no event is send. |
    | reachability-disconnected  | Device can use data or SMS usage | No | The device is reachable, so no "disconnected" event is sent. |
    | reachability-disconnected  | Device is disconnected | Yes | The device is disconnected, so the event is triggered. |

    ### Notifications callback

    This endpoint describes the event notification received on subscription listener side when the event occurred.
    As for subscription, detailed description of the event notification is provided in the CAMARA API design guideline document.

    _**WARNING**: This callback endpoint must be exposed on the consumer side as `POST /{$request.body#/sink}`.
      Developers may provide a callback URL on which notifications regarding reachability-status can be received from the service provider.
      If an event occurs the application will send events to the provided webhook - `sink`._

    # Further info and support

    ## Authorization and authentication

    The "Camara Security and Interoperability Profile" provides details of how an API consumer requests an access token. Please refer to Identity and Consent Management (https://github.com/camaraproject/IdentityAndConsentManagement/) for the released version of the profile.

    The specific authorization flows to be used will be agreed upon during the onboarding process, happening between the API consumer and the API provider, taking into account the declared purpose for accessing the API, whilst also being subject to the prevailing legal framework dictated by local legislation.

    In cases where personal data is processed by the API and users can exercise their rights through mechanisms such as opt-in and/or opt-out, the use of three-legged access tokens is mandatory. This ensures that the API remains in compliance with privacy regulations, upholding the principles of transparency and user-centric privacy-by-design.

    ## Identifying the device from the access token

    This API requires the API consumer to identify a device as the subject of the API as follows:
    - When the API is invoked using a two-legged access token, the subject will be identified from the optional `device` object, which therefore MUST be provided.

    - When a three-legged access token is used however, this optional identifier MUST NOT be provided, as the subject will be uniquely identified from the access token.

    This approach simplifies API usage for API consumers using a three-legged access token to invoke the API by relying on the information that is associated with the access token and was identified during the authentication process.

    ### Error handling:
    - If the subject cannot be identified from the access token and the optional `device` object is not included in the request, then the server will return an error with the `422 MISSING_IDENTIFIER` error code.

    - If the subject can be identified from the access token and the optional `device` object is also included in the request, then the server will return an error with the `422 UNNECESSARY_IDENTIFIER` error code. This will be the case even if the same device is identified by these two methods, as the server is unable to make this comparison.

    ## Multi-SIM scenario handling

    In multi-SIM scenarios where more than one mobile device is associated with a phone number (e.g. a smartphone with an associated smartwatch), it might not be possible to uniquely identify from that phone number the device for which reachability status notifications should be provided. If the phone number is used as the device identifier when creating a subscription for a multi-SIM scenario, the API may:
    - respond with an error, or
    - provide reachability status update notifications for the multi-SIM group as a whole, or
    - provide reachability status update notifications only for a single device in the multi-SIM group, which may not be the intended device.

    Possible solutions in such a scenario include:
    - Using the authorisation code flow to obtain an access token, which will automatically identify the intended device
    - Identifying the intended device from a unique identifier for that device, such as its source IP address and port
    - Check with the SIM provider whether a unique "secondary" phone number is already associated with each device, and use the secondary phone number to identify the intended device if available.

    ## Additional CAMARA error responses

    The list of error codes in this API specification is not exhaustive. Therefore the API specification may not document some non-mandatory error statuses as indicated in `CAMARA API Design Guide`.

    Please refer to the `CAMARA_common.yaml` of the Commonalities Release associated to this API version for a complete list of error responses. The applicable Commonalities Release can be identified in the `API Readiness Checklist` document associated to this API version.

    As a specific rule, error `501 - NOT_IMPLEMENTED` can be only a possible error response if it is explicitly documented in the API.

  license:
    name: Apache 2.0
    url: https://www.apache.org/licenses/LICENSE-2.0.html
  version: wip
  x-camara-commonalities: 0.6
externalDocs:
  description: Product documentation at CAMARA
  url: https://github.com/camaraproject/DeviceReachabilityStatus

servers:
  - url: "{apiRoot}/device-reachability-status-subscriptions/vwip"
    variables:
      apiRoot:
        default: http://localhost:9091
        description: API root, defined by the service provider, e.g. api.example.com or api.example.com/somepath

tags:
  - name: Device reachability status subscription
    description: Operation to manage event subscription on device reachability status event.

paths:
  /subscriptions:
    post:
      tags:
        - Device reachability status subscription
      summary: "Create a device reachability status event subscription for a device"
      description: Create a device reachability status event subscription for a device
      operationId: createDeviceReachabilityStatusSubscription
      parameters:
        - $ref: '#/components/parameters/x-correlator'
      security:
        - openId:
            - device-reachability-status-subscriptions:org.camaraproject.device-reachability-status-subscriptions.v0.reachability-data:create
            - device-reachability-status-subscriptions:org.camaraproject.device-reachability-status-subscriptions.v0.reachability-sms:create
            - device-reachability-status-subscriptions:org.camaraproject.device-reachability-status-subscriptions.v0.reachability-disconnected:create
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: "#/components/schemas/SubscriptionRequest"
            examples:
              Create Subscription:
                $ref: "#/components/examples/CREATE_SUBSCRIPTION"
      callbacks:
        notifications:
          "{$request.body#/sink}":
            post:
              summary: "notifications callback"
              description: |
                Important: this endpoint is to be implemented by the API consumer.
                The Device status server will call this endpoint whenever any device reachability status related event occurs.
              operationId: postNotification
              parameters:
                - $ref: '#/components/parameters/x-correlator'
              requestBody:
                required: true
                content:
                  application/cloudevents+json:
                    schema:
                      $ref: "#/components/schemas/CloudEvent"
                    examples:
                      reachability-data:
                        $ref: "#/components/examples/REACHABILITY_DATA"
                      reachability-sms:
                        $ref: "#/components/examples/REACHABILITY_SMS"
                      reachability-disconnected:
                        $ref: "#/components/examples/REACHABILITY_DISCONNECTED"
                      subscription-started:
                        $ref: "#/components/examples/SUBSCRIPTION_STARTED"
                      subscription-updated:
                        $ref: "#/components/examples/SUBSCRIPTION_UPDATED"
                      subscription-ended:
                        $ref: "#/components/examples/SUBSCRIPTION_ENDED"
              responses:
                "204":
                  description: Successful notification
                  headers:
                    x-correlator:
                      $ref: '#/components/headers/x-correlator'
                "400":
                  $ref: "#/components/responses/Generic400"
                "401":
                  $ref: "#/components/responses/Generic401"
                "403":
                  $ref: "#/components/responses/Generic403"
                "410":
                  $ref: "#/components/responses/Generic410"
                "429":
                  $ref: "#/components/responses/Generic429"
              security:
                - {}
                - notificationsBearerAuth: []

      responses:
        "201":
          description: Created
          headers:
            x-correlator:
              $ref: "#/components/headers/x-correlator"
          content:
            application/json:
              schema:
                $ref: "#/components/schemas/Subscription"
              examples:
                Active Subscription:
                  $ref: "#/components/examples/ACTIVE_SUBSCRIPTION"
                Active Subscription With Device Disambiguation:
                  $ref: "#/components/examples/ACTIVE_SUBSCRIPTION_WITH_DEVICE_DISAMBIGUATION"
        "202":
          description: Request accepted to be processed. It applies for async creation process.
          headers:
            x-correlator:
              $ref: "#/components/headers/x-correlator"
          content:
            application/json:
              schema:
                $ref: "#/components/schemas/SubscriptionAsync"
        "400":
          $ref: "#/components/responses/CreateSubscriptionBadRequest400"
        "401":
          $ref: "#/components/responses/Generic401"
        "403":
          $ref: "#/components/responses/SubscriptionPermissionDenied403"
        "409":
          $ref: "#/components/responses/Generic409"
        "422":
          $ref: "#/components/responses/CreateSubscriptionUnprocessableEntity422"
        "429":
          $ref: "#/components/responses/Generic429"

    get:
      tags:
        - Device reachability status subscription
      summary: "Retrieve a list of device reachability status event subscription"
      description: Retrieve a list of device reachability status event subscription(s)
      operationId: retrieveDeviceReachabilityStatusSubscriptionList
      parameters:
        - $ref: "#/components/parameters/x-correlator"
      security:
        - openId:
            - device-reachability-status-subscriptions:read
      responses:
        "200":
          description: List of event subscription details
          headers:
            x-correlator:
              $ref: "#/components/headers/x-correlator"
          content:
            application/json:
              schema:
                type: array
                minItems: 0
                items:
                  $ref: "#/components/schemas/Subscription"
              examples:
                List of Subscriptions:
                  $ref: "#/components/examples/SUBSCRIPTION_LIST"
                Empty List of Subscriptions:
                  $ref: "#/components/examples/EMPTY_SUBSCRIPTION_LIST"
        "400":
          $ref: "#/components/responses/Generic400"
        "401":
          $ref: "#/components/responses/Generic401"
        "403":
          $ref: "#/components/responses/Generic403"

  /subscriptions/{subscriptionId}:
    get:
      tags:
        - Device reachability status subscription
      summary: "Retrieve a device reachability status event subscription for a device"
      operationId: retrieveDeviceReachabilityStatusSubscription
      description: Retrieve a given subscription by ID
      security:
        - openId:
            - device-reachability-status-subscriptions:read
      parameters:
        - $ref: "#/components/parameters/SubscriptionId"
        - $ref: '#/components/parameters/x-correlator'
      responses:
        "200":
          description: OK
          headers:
            x-correlator:
              $ref: '#/components/headers/x-correlator'
          content:
            application/json:
              schema:
                $ref: "#/components/schemas/Subscription"
              examples:
                Active Subscription:
                  $ref: "#/components/examples/ACTIVE_SUBSCRIPTION"
                Active Subscription With Device Disambiguation:
                  $ref: "#/components/examples/ACTIVE_SUBSCRIPTION_WITH_DEVICE_DISAMBIGUATION"
                Subscription Activation Requested:
                  $ref: "#/components/examples/SUBSCRIPTION_ACTIVATION_REQUESTED"
                Subscription Deleted:
                  $ref: "#/components/examples/SUBSCRIPTION_DELETED"

        "400":
          $ref: "#/components/responses/SubscriptionIdRequired400"
        "401":
          $ref: "#/components/responses/Generic401"
        "403":
          $ref: "#/components/responses/Generic403"
        "404":
          $ref: "#/components/responses/Generic404"

    delete:
      tags:
        - Device reachability status subscription
      summary: "Delete a device reachability status event subscription for a device"
      operationId: deleteDeviceReachabilityStatusSubscription
      description: Delete a given subscription by ID
      security:
        - openId:
            - device-reachability-status-subscriptions:delete
      parameters:
        - $ref: "#/components/parameters/SubscriptionId"
        - $ref: '#/components/parameters/x-correlator'
      responses:
        "204":
          description: event subscription deleted
          headers:
            x-correlator:
              $ref: '#/components/headers/x-correlator'
        "202":
          description: Request accepted to be processed. It applies for async deletion process.
          headers:
            x-correlator:
              $ref: '#/components/headers/x-correlator'
          content:
            application/json:
              schema:
                $ref: "#/components/schemas/SubscriptionAsync"
        "400":
          $ref: "#/components/responses/SubscriptionIdRequired400"
        "401":
          $ref: "#/components/responses/Generic401"
        "403":
          $ref: "#/components/responses/Generic403"
        "404":
          $ref: "#/components/responses/Generic404"

components:
  securitySchemes:
    openId:
      type: openIdConnect
      openIdConnectUrl: https://example.com/.well-known/openid-configuration
    notificationsBearerAuth:
      type: http
      scheme: bearer
      bearerFormat: "{$request.body#/sinkCredential.credentialType}"

  parameters:
    SubscriptionId:
      name: subscriptionId
      in: path
      description: Subscription identifier that was obtained from the create event subscription operation
      required: true
      schema:
        $ref: "#/components/schemas/SubscriptionId"

    x-correlator:
      name: x-correlator
      in: header
      description: Correlation id for the different services
      schema:
        $ref: "#/components/schemas/XCorrelator"

  headers:
    x-correlator:
      description: Correlation id for the different services
      schema:
        $ref: "#/components/schemas/XCorrelator"

  schemas:
    ErrorInfo:
      type: object
      required:
        - status
        - code
        - message
      properties:
        status:
          type: integer
          description: HTTP response status code
        code:
          type: string
          description: A human-readable code to describe the error
        message:
          type: string
          description: A human-readable description of what the event represents

    SubscriptionRequest:
      description: The request for creating a event-type event subscription
      type: object
      required:
        - sink
        - protocol
        - config
        - types
      properties:
        protocol:
          $ref: "#/components/schemas/Protocol"
        sink:
          type: string
          format: uri
          pattern: ^https:\/\/.+$
          description: The address to which events shall be delivered using the selected protocol.
          example: "https://endpoint.example.com/sink"
        sinkCredential:
          $ref: "#/components/schemas/SinkCredential"
        types:
          description: |
            Camara Event types eligible to be delivered by this subscription.
            Note: For the current Commonalities API design guidelines, only one event type per subscription is allowed, yet in the following releases use of array of event types SHALL be specified without changing this definition.
          type: array
          minItems: 1
          maxItems: 1
          items:
            $ref: "#/components/schemas/SubscriptionEventType"
        config:
          $ref: "#/components/schemas/Config"
      discriminator:
        propertyName: protocol
        mapping:
          HTTP: "#/components/schemas/HTTPSubscriptionRequest"
          MQTT3: "#/components/schemas/MQTTSubscriptionRequest"
          MQTT5: "#/components/schemas/MQTTSubscriptionRequest"
          AMQP: "#/components/schemas/AMQPSubscriptionRequest"
          NATS: "#/components/schemas/NATSSubscriptionRequest"
          KAFKA: "#/components/schemas/ApacheKafkaSubscriptionRequest"

    Protocol:
      type: string
      enum: ["HTTP", "MQTT3", "MQTT5", "AMQP", "NATS", "KAFKA"]
      description: Identifier of a delivery protocol. Only HTTP is allowed for now
      example: "HTTP"

    Config:
      description: |
        Implementation-specific configuration parameters needed by the subscription manager for acquiring events.
        In CAMARA we have predefined attributes like `subscriptionExpireTime`, `subscriptionMaxEvents`, `initialEvent`
        Specific event type attributes must be defined in `subscriptionDetail`
        Note: if a request is performed for several event type, all subscribed event will use same `config` parameters.
      type: object
      required:
        - subscriptionDetail
      properties:
        subscriptionDetail:
          $ref: "#/components/schemas/CreateSubscriptionDetail"
        subscriptionExpireTime:
          type: string
          format: date-time
          example: 2023-01-17T13:18:23.682Z
          description: The subscription expiration time (in date-time format) requested by the API consumer.
        subscriptionMaxEvents:
          type: integer
          description: Identifies the maximum number of event reports to be generated (>=1) requested by the API consumer - Once this number is reached, the subscription ends.
          minimum: 1
          example: 5
        initialEvent:
          type: boolean
          description: |
            Set to `true` by API consumer if consumer wants to get an event as soon as the subscription is created and current situation reflects event request.
            Example: Consumer subscribes to reachability SMS. If consumer sets initialEvent to true and device is already reachable by SMS, an event is triggered.

    SinkCredential:
      description: A sink credential provides authentication or authorization information necessary to enable delivery of events to a target.
      type: object
      properties:
        credentialType:
          type: string
          enum:
            - PLAIN
            - ACCESSTOKEN
            - REFRESHTOKEN
          description: |
            The type of the credential.
            Note: Type of the credential - MUST be set to ACCESSTOKEN for now
      discriminator:
        propertyName: credentialType
        mapping:
          PLAIN: "#/components/schemas/PlainCredential"
          ACCESSTOKEN: "#/components/schemas/AccessTokenCredential"
          REFRESHTOKEN: "#/components/schemas/RefreshTokenCredential"
      required:
        - credentialType

    PlainCredential:
      type: object
      description: A plain credential as a combination of an identifier and a secret.
      allOf:
        - $ref: "#/components/schemas/SinkCredential"
        - type: object
          required:
            - identifier
            - secret
          properties:
            identifier:
              description: The identifier might be an account or username.
              type: string
            secret:
              description: The secret might be a password or passphrase.
              type: string

    AccessTokenCredential:
      type: object
      description: An access token credential.
      allOf:
        - $ref: "#/components/schemas/SinkCredential"
        - type: object
          properties:
            accessToken:
              description: REQUIRED. An access token is a previously acquired token granting access to the target resource.
              type: string
            accessTokenExpiresUtc:
              type: string
              format: date-time
              description: |
                REQUIRED. An absolute (UTC) timestamp at which the token shall be considered expired.
                In the case of an ACCESS_TOKEN_EXPIRED termination reason, implementation should notify the client before the expiration date.
                If the access token is a JWT and registered "exp" (Expiration Time) claim is present, the two expiry times should match.
                It must follow [RFC 3339](https://datatracker.ietf.org/doc/html/rfc3339#section-5.6) and must have time zone.
                Recommended format is yyyy-MM-dd'T'HH:mm:ss.SSSZ (i.e. which allows 2023-07-03T14:27:08.312+02:00 or 2023-07-03T12:27:08.312Z)
              example: "2023-07-03T12:27:08.312Z"
            accessTokenType:
              description: REQUIRED. Type of the access token (See [OAuth 2.0](https://tools.ietf.org/html/rfc6749#section-7.1)).
              type: string
              enum:
                - bearer
          required:
            - accessToken
            - accessTokenExpiresUtc
            - accessTokenType

    RefreshTokenCredential:
      type: object
      description: An access token credential with a refresh token.
      allOf:
        - $ref: "#/components/schemas/SinkCredential"
        - type: object
          properties:
            accessToken:
              description: REQUIRED. An access token is a previously acquired token granting access to the target resource.
              type: string
            accessTokenExpiresUtc:
              type: string
              format: date-time
              description: |
                REQUIRED. An absolute (UTC) timestamp at which the token shall be considered expired.
                In the case of an ACCESS_TOKEN_EXPIRED termination reason, implementation should notify the client before the expiration date.
                If the access token is a JWT and registered "exp" (Expiration Time) claim is present, the two expiry times should match.
                It must follow [RFC 3339](https://datatracker.ietf.org/doc/html/rfc3339#section-5.6) and must have time zone.
                Recommended format is yyyy-MM-dd'T'HH:mm:ss.SSSZ (i.e. which allows 2023-07-03T14:27:08.312+02:00 or 2023-07-03T12:27:08.312Z)
              example: "2023-07-03T12:27:08.312Z"
            accessTokenType:
              description: REQUIRED. Type of the access token (See [OAuth 2.0](https://tools.ietf.org/html/rfc6749#section-7.1)).
              type: string
              enum:
                - bearer
            refreshToken:
              description: REQUIRED. An refresh token credential used to acquire access tokens.
              type: string
            refreshTokenEndpoint:
              type: string
              format: uri
              description: REQUIRED. A URL at which the refresh token can be traded for an access token.
      required:
        - accessToken
        - accessTokenExpiresUtc
        - accessTokenType
        - refreshToken
        - refreshTokenEndpoint

    CreateSubscriptionDetail:
      description: The detail of the requested event subscription.
      type: object
      properties:
        device:
          $ref: "#/components/schemas/Device"

    EventTypeNotification:
      type: string
      description: |
        reachability-data - Event triggered when the device is connected to the network for Data usage (regardless of the SMS reachability).

        reachability-sms - Event triggered when the device is connected to the network only for SMS usage.

        reachability-disconnected - Event triggered when the device is not connected.

        subscription-started - Event triggered when the subscription starts.

        subscription-updated - Event triggered when the subscription is updated.

        subscription-ended - Event triggered when the subscription ends.
      enum:
        - org.camaraproject.device-reachability-status-subscriptions.v0.reachability-data
        - org.camaraproject.device-reachability-status-subscriptions.v0.reachability-sms
        - org.camaraproject.device-reachability-status-subscriptions.v0.reachability-disconnected
        - org.camaraproject.device-reachability-status-subscriptions.v0.subscription-started
        - org.camaraproject.device-reachability-status-subscriptions.v0.subscription-updated
        - org.camaraproject.device-reachability-status-subscriptions.v0.subscription-ended

    SubscriptionEventType:
      type: string
      description: |
        reachability-data - Event triggered when the device is connected to the network for Data usage (regardless of the SMS reachability).

        reachability-sms - Event triggered when the device is connected to the network only for SMS usage

        reachability-disconnected - Event triggered when the device is not connected.

      enum:
        - org.camaraproject.device-reachability-status-subscriptions.v0.reachability-data
        - org.camaraproject.device-reachability-status-subscriptions.v0.reachability-sms
        - org.camaraproject.device-reachability-status-subscriptions.v0.reachability-disconnected

    Subscription:
      description: Represents a event-type subscription.
      type: object
      required:
        - sink
        - protocol
        - config
        - types
        - id
      properties:
        protocol:
          $ref: "#/components/schemas/Protocol"
        sink:
          type: string
          format: uri
          pattern: ^https:\/\/.+$
          description: The address to which events shall be delivered using the selected protocol.
          example: "https://endpoint.example.com/sink"
        types:
          description: |
            Camara Event types eligible to be delivered by this subscription.
            Note: For the current Commonalities API design guidelines, only one event type per subscription is allowed
          type: array
          minItems: 1
          maxItems: 1
          items:
            $ref: "#/components/schemas/SubscriptionEventType"
        config:
          $ref: '#/components/schemas/Config'
        id:
          $ref: '#/components/schemas/SubscriptionId'
        startsAt:
          type: string
          format: date-time
          description: |
            Date when the event subscription will begin/began
            It must follow [RFC 3339](https://datatracker.ietf.org/doc/html/rfc3339#section-5.6) and must have time zone.
            Recommended format is yyyy-MM-dd'T'HH:mm:ss.SSSZ (i.e. which allows 2023-07-03T14:27:08.312+02:00 or 2023-07-03T12:27:08.312Z)
          example: "2023-07-03T12:27:08.312Z"
        expiresAt:
          type: string
          format: date-time
          description: |
            Date when the event subscription will expire. Only provided when `subscriptionExpireTime` is indicated by API client or Telco Operator has specific policy about that.
            It must follow [RFC 3339](https://datatracker.ietf.org/doc/html/rfc3339#section-5.6) and must have time zone.
            Recommended format is yyyy-MM-dd'T'HH:mm:ss.SSSZ (i.e. which allows 2023-07-03T14:27:08.312+02:00 or 2023-07-03T12:27:08.312Z)
          example: "2023-07-03T12:27:08.312Z"
        status:
          type: string
          description: |-
            Current status of the subscription - Management of Subscription State engine is not mandatory for now. Note not all statuses may be considered to be implemented. Details:
              - `ACTIVATION_REQUESTED`: Subscription creation (POST) is triggered but subscription creation process is not finished yet.
              - `ACTIVE`: Subscription creation process is completed. Subscription is fully operative.
              - `INACTIVE`: Subscription is temporarily inactive, but its workflow logic is not deleted.
              - `EXPIRED`: Subscription is ended (no longer active). This status applies when subscription is ended due to `SUBSCRIPTION_EXPIRED` or `ACCESS_TOKEN_EXPIRED` event.
              - `DELETED`: Subscription is ended as deleted (no longer active). This status applies when subscription information is kept (i.e. subscription workflow is no longer active but its meta-information is kept).
          enum:
            - ACTIVATION_REQUESTED
            - ACTIVE
            - EXPIRED
            - INACTIVE
            - DELETED
      discriminator:
        propertyName: protocol
        mapping:
          HTTP: "#/components/schemas/HTTPSubscriptionResponse"
          MQTT3: "#/components/schemas/MQTTSubscriptionResponse"
          MQTT5: "#/components/schemas/MQTTSubscriptionResponse"
          AMQP: "#/components/schemas/AMQPSubscriptionResponse"
          NATS: "#/components/schemas/NATSSubscriptionResponse"
          KAFKA: "#/components/schemas/ApacheKafkaSubscriptionResponse"
      example:
        id: 550e8400-e29b-41d4-a716-446655440000
        sink: https://endpoint.example.com/sink
        protocol: HTTP
        types:
          - "org.camaraproject.device-reachability-status-subscriptions.v0.reachability-data"
        config:
          subscriptionDetail:
            device:
              phoneNumber: "+123456789"
          subscriptionExpireTime: "2024-07-17T13:18:23.682Z"
          subscriptionMaxEvents: 5
          initialEvent: true
        startsAt: "2024-07-03T21:12:02.871Z"
        expiresAt: "2024-07-03T21:12:02.871Z"
        status: ACTIVE

    Device:
      description: |
        End-user equipment able to connect to a mobile network. Examples of devices include smartphones or IoT sensors/actuators.

        The developer can choose to provide the below specified device identifiers:

        * `ipv4Address`
        * `ipv6Address`
        * `phoneNumber`
        * `networkAccessIdentifier`

        NOTE: the MNO might support only a subset of these options. The API invoker can provide multiple identifiers to be compatible across different MNOs. In this case the identifiers MUST belong to the same device.
      type: object
      properties:
        phoneNumber:
          $ref: "#/components/schemas/PhoneNumber"
        networkAccessIdentifier:
          $ref: "#/components/schemas/NetworkAccessIdentifier"
        ipv4Address:
          $ref: "#/components/schemas/DeviceIpv4Addr"
        ipv6Address:
          $ref: "#/components/schemas/DeviceIpv6Address"
      minProperties: 1

    DeviceResponse:
      description: |
        An identifier for the end-user equipment able to connect to the network that the response refers to. This parameter is only returned when the API consumer includes the `device` parameter in their request (i.e. they are using a two-legged access token), and is relevant when more than one device identifier is specified, as only one of those device identifiers is allowed in the response.

        If the API consumer provides more than one device identifier in their request, the API provider must return a single identifier which is the one they are using to fulfil the request, even if the identifiers do not match the same device. API provider does not perform any logic to validate/correlate that the indicated device identifiers match the same device. No error should be returned if the identifiers are otherwise valid to prevent API consumers correlating different identifiers with a given end user.

      allOf:
        - $ref: "#/components/schemas/Device"
        - maxProperties: 1

    PhoneNumber:
      description: A public identifier addressing a telephone subscription. In mobile networks it corresponds to the MSISDN (Mobile Station International Subscriber Directory Number). In order to be globally unique it has to be formatted in international format, according to E.164 standard, prefixed with '+'.
      type: string
      pattern: '^\+[1-9][0-9]{4,14}$'
      example: "+123456789"

    NetworkAccessIdentifier:
      description: A public identifier addressing a subscription in a mobile network. In 3GPP terminology, it corresponds to the GPSI formatted with the External Identifier ({Local Identifier}@{Domain Identifier}). Unlike the telephone number, the network access identifier is not subjected to portability ruling in force, and is individually managed by each operator.
      type: string
      example: "123456789@example.com"

    DeviceIpv4Addr:
      type: object
      description: |
        The device should be identified by either the public (observed) IP address and port as seen by the application server, or the private (local) and any public (observed) IP addresses in use by the device (this information can be obtained by various means, for example from some DNS servers).

        If the allocated and observed IP addresses are the same (i.e. NAT is not in use) then  the same address should be specified for both publicAddress and privateAddress.

        If NAT64 is in use, the device should be identified by its publicAddress and publicPort, or separately by its allocated IPv6 address (field ipv6Address of the Device object)

        In all cases, publicAddress must be specified, along with at least one of either privateAddress or publicPort, dependent upon which is known. In general, mobile devices cannot be identified by their public IPv4 address alone.
      properties:
        publicAddress:
          $ref: "#/components/schemas/SingleIpv4Addr"
        privateAddress:
          $ref: "#/components/schemas/SingleIpv4Addr"
        publicPort:
          $ref: "#/components/schemas/Port"
      anyOf:
        - required: [publicAddress, privateAddress]
        - required: [publicAddress, publicPort]
      example:
        publicAddress: "84.125.93.10"
        publicPort: 59765

    SingleIpv4Addr:
      description: A single IPv4 address with no subnet mask
      type: string
      format: ipv4
      example: "84.125.93.10"

    Port:
      description: TCP or UDP port number
      type: integer
      minimum: 0
      maximum: 65535

    DeviceIpv6Address:
      description: |
        The device should be identified by the observed IPv6 address, or by any single IPv6 address from within the subnet allocated to the device (e.g. adding ::0 to the /64 prefix).
      type: string
      format: ipv6
      example: 2001:db8:85a3:8d3:1319:8a2e:370:7344

    SubscriptionAsync:
      description: Response for a device reachability status operation managed asynchronously (Creation or Deletion)
      type: object
      required:
        - id
      properties:
        id:
          $ref: "#/components/schemas/SubscriptionId"

    SubscriptionId:
      type: string
      description: The unique identifier of the subscription in the scope of the subscription manager. When this information is contained within an event notification, this concept SHALL be referred as subscriptionId as per Commonalities Event Notification Model.
      example: qs15-h556-rt89-1298

    CloudEvent:
      description: The notification callback
      required:
        - id
        - source
        - specversion
        - type
        - time
      properties:
        id:
          type: string
          description: identifier of this event, that must be unique in the source context.
        source:
          $ref: "#/components/schemas/Source"
        type:
          $ref: "#/components/schemas/EventTypeNotification"
        specversion:
          type: string
          description: Version of the specification to which this event conforms (must be 1.0 if it conforms to cloudevents 1.0.2 version)
          enum:
            - "1.0"
        datacontenttype:
          type: string
          description: 'media-type that describes the event payload encoding, must be "application/json" for CAMARA APIs'
          enum:
            - application/json
        data:
          type: object
          description: Event details payload described in each CAMARA API and referenced by its type
        time:
          $ref: "#/components/schemas/DateTime"
      discriminator:
        propertyName: "type"
        mapping:
          org.camaraproject.device-reachability-status-subscriptions.v0.reachability-data: "#/components/schemas/EventReachabilityData"
          org.camaraproject.device-reachability-status-subscriptions.v0.reachability-sms: "#/components/schemas/EventReachabilitySms"
          org.camaraproject.device-reachability-status-subscriptions.v0.reachability-disconnected: "#/components/schemas/EventReachabilityDisconnected"
          org.camaraproject.device-reachability-status-subscriptions.v0.subscription-started: "#/components/schemas/EventSubscriptionStarted"
          org.camaraproject.device-reachability-status-subscriptions.v0.subscription-updated: "#/components/schemas/EventSubscriptionUpdated"
          org.camaraproject.device-reachability-status-subscriptions.v0.subscription-ended: "#/components/schemas/EventSubscriptionEnded"

    Source:
      type: string
      format: uri-reference
      minLength: 1
      description: |
        Identifies the context in which an event happened - be a non-empty `URI-reference` like:
        - URI with a DNS authority:
          * https://github.com/cloudevents
          * mailto:cncf-wg-serverless@lists.cncf.io
        - Universally-unique URN with a UUID:
          * urn:uuid:6e8bc430-9c3a-11d9-9669-0800200c9a66
        - Application-specific identifier:
          * /cloudevents/spec/pull/123
          * 1-555-123-4567
      example: "https://notificationSendServer12.supertelco.com"

    DateTime:
      type: string
      format: date-time
      description: |
        Timestamp of when the occurrence happened.
        If the time of the occurrence cannot be determined then this attribute MAY be set to some other time (such as the current time) by the CloudEvents producer,
        however all producers for the same source MUST be consistent in this respect. In other words,
        either they all use the actual time of the occurrence or they all use the same algorithm to determine the value used.
        It must follow [RFC 3339](https://datatracker.ietf.org/doc/html/rfc3339#section-5.6) and must have time zone.
        Recommended format is yyyy-MM-dd'T'HH:mm:ss.SSSZ (i.e. which allows 2023-07-03T14:27:08.312+02:00 or 2023-07-03T12:27:08.312Z)
      example: "2018-04-05T17:31:00Z"

    EventReachabilityData:
      description: event structure for reachability data usage
      allOf:
        - $ref: "#/components/schemas/CloudEvent"
        - type: object
          properties:
            data:
              $ref: "#/components/schemas/ReachabilityDataSmsDisconnected"

    EventReachabilitySms:
      description: event structure for reachability SMS usage
      allOf:
        - $ref: "#/components/schemas/CloudEvent"
        - type: object
          properties:
            data:
              $ref: "#/components/schemas/ReachabilityDataSmsDisconnected"

    EventReachabilityDisconnected:
      description: event structure for disconnection
      allOf:
        - $ref: "#/components/schemas/CloudEvent"
        - type: object
          properties:
            data:
              $ref: "#/components/schemas/ReachabilityDataSmsDisconnected"

    ReachabilityDataSmsDisconnected:
      required:
        - subscriptionId
      properties:
        device:
          $ref: "#/components/schemas/DeviceResponse"
        subscriptionId:
          $ref: "#/components/schemas/SubscriptionId"

    EventSubscriptionEnded:
      description: Event structure for sending subscription-ended event
      allOf:
        - $ref: "#/components/schemas/CloudEvent"
        - type: object
          properties:
            data:
              $ref: "#/components/schemas/SubscriptionEnded"

    EventSubscriptionStarted:
      description: Event structure for event subscription started
      allOf:
        - $ref: "#/components/schemas/CloudEvent"
        - type: object
          properties:
            data:
              $ref: "#/components/schemas/SubscriptionStarted"

    SubscriptionStarted:
      description: Event detail structure for subscription started event
      type: object
      required:
        - initiationReason
        - subscriptionId
      properties:
        device:
          $ref: "#/components/schemas/Device"
        initiationReason:
          $ref: "#/components/schemas/InitiationReason"
        subscriptionId:
          $ref: "#/components/schemas/SubscriptionId"
        initiationDescription:
          description: Description about the start of the subscription.
          type: string

    InitiationReason:
      type: string
      description: |
        - SUBSCRIPTION_CREATED - Subscription created by API Server
      enum:
        - SUBSCRIPTION_CREATED

    EventSubscriptionUpdated:
      description: Event structure for event subscription updated
      allOf:
        - $ref: "#/components/schemas/CloudEvent"
        - type: object
          properties:
            data:
              $ref: "#/components/schemas/SubscriptionUpdated"

    SubscriptionUpdated:
      description: Event detail structure for subscription updated event
      type: object
      required:
        - updateReason
        - subscriptionId
      properties:
        device:
          $ref: "#/components/schemas/Device"
        updateReason:
          $ref: "#/components/schemas/UpdateReason"
        subscriptionId:
          $ref: "#/components/schemas/SubscriptionId"
        updateDescription:
          description: Description about the subscription update.
          type: string

    UpdateReason:
      type: string
      description: |
        - SUBSCRIPTION_ACTIVE - API server transitioned susbcription status to `ACTIVE`
        - SUBSCRIPTION_INACTIVE - API server transitioned susbcription status to `INACTIVE`
      enum:
        - SUBSCRIPTION_ACTIVE
        - SUBSCRIPTION_INACTIVE

    SubscriptionEnded:
      description: Event detail structure for org.camaraproject.device-reachability-status-subscriptions.v0.subscription-ended event
      type: object
      required:
        - terminationReason
        - subscriptionId
      properties:
        device:
          $ref: "#/components/schemas/DeviceResponse"
        terminationReason:
          $ref: "#/components/schemas/TerminationReason"
        subscriptionId:
          $ref: "#/components/schemas/SubscriptionId"
        terminationDescription:
          type: string

    TerminationReason:
      type: string
      description: |
        - NETWORK_TERMINATED - API server stopped sending notification
        - SUBSCRIPTION_EXPIRED - Subscription expire time (optionally set by the requester) has been reached
        - MAX_EVENTS_REACHED - Maximum number of events (optionally set by the requester) has been reached
        - ACCESS_TOKEN_EXPIRED - Access Token sinkCredential (optionally set by the requester) expiration time has been reached
        - SUBSCRIPTION_DELETED - Subscription was deleted by the requester
      enum:
        - MAX_EVENTS_REACHED
        - NETWORK_TERMINATED
        - SUBSCRIPTION_EXPIRED
        - ACCESS_TOKEN_EXPIRED
        - SUBSCRIPTION_DELETED

    HTTPSubscriptionRequest:
      allOf:
        - $ref: "#/components/schemas/SubscriptionRequest"
        - type: object
          properties:
            protocolSettings:
              $ref: "#/components/schemas/HTTPSettings"

    HTTPSubscriptionResponse:
      allOf:
        - $ref: "#/components/schemas/Subscription"
        - type: object
          properties:
            protocolSettings:
              $ref: "#/components/schemas/HTTPSettings"

    HTTPSettings:
      type: object
      properties:
        headers:
          type: object
          description: |-
            A set of key/value pairs that is copied into the HTTP request as custom headers.

            NOTE: Use/Applicability of this concept has not been discussed in Commonalities under the scope of Meta Release v0.4. When required by an API project as an option to meet a UC/Requirement, please generate an issue for Commonalities discussion about it.
          additionalProperties:
            type: string
        method:
          type: string
          description: The HTTP method to use for sending the message.
          enum:
            - POST

    MQTTSubscriptionRequest:
      allOf:
        - $ref: "#/components/schemas/SubscriptionRequest"
        - type: object
          properties:
            protocolSettings:
              $ref: "#/components/schemas/MQTTSettings"

    MQTTSubscriptionResponse:
      allOf:
        - $ref: "#/components/schemas/Subscription"
        - type: object
          properties:
            protocolSettings:
              $ref: "#/components/schemas/MQTTSettings"

    MQTTSettings:
      type: object
      properties:
        topicName:
          type: string
        qos:
          type: integer
          format: int32
        retain:
          type: boolean
        expiry:
          type: integer
          format: int32
        userProperties:
          type: object
      required:
        - topicName

    AMQPSubscriptionRequest:
      allOf:
        - $ref: "#/components/schemas/SubscriptionRequest"
        - type: object
          properties:
            protocolSettings:
              $ref: "#/components/schemas/AMQPSettings"

    AMQPSubscriptionResponse:
      allOf:
        - $ref: "#/components/schemas/Subscription"
        - type: object
          properties:
            protocolSettings:
              $ref: "#/components/schemas/AMQPSettings"

    AMQPSettings:
      type: object
      properties:
        address:
          type: string
        linkName:
          type: string
        senderSettlementMode:
          type: string
          enum: ["settled", "unsettled"]
        linkProperties:
          type: object
          additionalProperties:
            type: string

    ApacheKafkaSubscriptionRequest:
      allOf:
        - $ref: "#/components/schemas/SubscriptionRequest"
        - type: object
          properties:
            protocolSettings:
              $ref: "#/components/schemas/ApacheKafkaSettings"

    ApacheKafkaSubscriptionResponse:
      allOf:
        - $ref: "#/components/schemas/Subscription"
        - type: object
          properties:
            protocolSettings:
              $ref: "#/components/schemas/ApacheKafkaSettings"

    ApacheKafkaSettings:
      type: object
      properties:
        topicName:
          type: string
        partitionKeyExtractor:
          type: string
        clientId:
          type: string
        ackMode:
          type: integer
      required:
        - topicName

    NATSSubscriptionRequest:
      allOf:
        - $ref: "#/components/schemas/SubscriptionRequest"
        - type: object
          properties:
            protocolSettings:
              $ref: "#/components/schemas/NATSSettings"

    NATSSubscriptionResponse:
      allOf:
        - $ref: "#/components/schemas/Subscription"
        - type: object
          properties:
            protocolSettings:
              $ref: "#/components/schemas/NATSSettings"

    NATSSettings:
      type: object
      properties:
        subject:
          type: string
      required:
        - subject

    XCorrelator:
      type: string
      pattern: ^[a-zA-Z0-9-_:;.\/<>{}]{0,256}$
      example: "b4333c46-49c0-4f62-80d7-f0ef930f1c46"

  responses:
    CreateSubscriptionBadRequest400:
      description: Problem with the client request
      headers:
        x-correlator:
          $ref: "#/components/headers/x-correlator"
      content:
        application/json:
          schema:
            allOf:
              - $ref: "#/components/schemas/ErrorInfo"
              - type: object
                properties:
                  status:
                    enum:
                      - 400
                  code:
                    enum:
                      - INVALID_ARGUMENT
                      - OUT_OF_RANGE
                      - INVALID_PROTOCOL
                      - INVALID_CREDENTIAL
                      - INVALID_TOKEN
                      - INVALID_SINK
          examples:
            GENERIC_400_INVALID_ARGUMENT:
              description: Invalid Argument. Generic Syntax Exception
              value:
                status: 400
                code: INVALID_ARGUMENT
                message: Client specified an invalid argument, request body or query param.
            GENERIC_400_OUT_OF_RANGE:
              description: Out of Range. Specific Syntax Exception used when a given field has a pre-defined range or a invalid filter criteria combination is requested
              value:
                status: 400
                code: OUT_OF_RANGE
                message: Client specified an invalid range.
            GENERIC_400_INVALID_PROTOCOL:
              description: Invalid protocol for events subscription management
              value:
                status: 400
                code: INVALID_PROTOCOL
                message: Only HTTP is supported
            GENERIC_400_INVALID_CREDENTIAL:
              description: Invalid sink credential type
              value:
                status: 400
                code: INVALID_CREDENTIAL
                message: Only Access token is supported
            GENERIC_400_INVALID_TOKEN:
              description: Invalid token type for sink credential of type ACCESSTOKEN
              value:
                status: 400
                code: INVALID_TOKEN
                message: Only bearer token is supported
            GENERIC_400_INVALID_SINK:
              description: Invalid sink value
              value:
                status: 400
                code: INVALID_SINK
                message: sink not valid for the specified protocol
    Generic400:
      description: Problem with the client request
      headers:
        x-correlator:
          $ref: "#/components/headers/x-correlator"
      content:
        application/json:
          schema:
            allOf:
              - $ref: "#/components/schemas/ErrorInfo"
              - type: object
                properties:
                  status:
                    enum:
                      - 400
                  code:
                    enum:
                      - INVALID_ARGUMENT
          examples:
            GENERIC_400_INVALID_ARGUMENT:
              description: Invalid Argument. Generic Syntax Exception
              value:
                status: 400
                code: INVALID_ARGUMENT
                message: Client specified an invalid argument, request body or query param.

    SubscriptionIdRequired400:
      description: Problem with the client request
      headers:
        x-correlator:
          $ref: "#/components/headers/x-correlator"
      content:
        application/json:
          schema:
            allOf:
              - $ref: "#/components/schemas/ErrorInfo"
              - type: object
                properties:
                  status:
                    enum:
                      - 400
                  code:
                    enum:
                      - INVALID_ARGUMENT
          examples:
            GENERIC_400_INVALID_ARGUMENT:
              description: Invalid Argument. Generic Syntax Exception
              value:
                status: 400
                code: INVALID_ARGUMENT
                message: Client specified an invalid argument, request body or query param.
            GENERIC_400_SUBSCRIPTION_ID_REQUIRED:
              description: subscription id is required
              value:
                status: 400
                code: INVALID_ARGUMENT
                message: "Expected property is missing: subscriptionId"

    Generic401:
      description: Authentication problem with the client request
      headers:
        x-correlator:
          $ref: "#/components/headers/x-correlator"
      content:
        application/json:
          schema:
            allOf:
              - $ref: "#/components/schemas/ErrorInfo"
              - type: object
                properties:
                  status:
                    enum:
                      - 401
                  code:
                    enum:
                      - UNAUTHENTICATED
          examples:
            GENERIC_401_UNAUTHENTICATED:
              description: Request cannot be authenticated and a new authentication is required
              value:
                status: 401
                code: UNAUTHENTICATED
                message: Request not authenticated due to missing, invalid, or expired credentials. A new authentication is required.

    Generic403:
      description: Client does not have sufficient permission
      headers:
        x-correlator:
          $ref: "#/components/headers/x-correlator"
      content:
        application/json:
          schema:
            allOf:
              - $ref: "#/components/schemas/ErrorInfo"
              - type: object
                properties:
                  status:
                    enum:
                      - 403
                  code:
                    enum:
                      - PERMISSION_DENIED
          examples:
            GENERIC_403_PERMISSION_DENIED:
              description: Permission denied. OAuth2 token access does not have the required scope or when the user fails operational security
              value:
                status: 403
                code: PERMISSION_DENIED
                message: Client does not have sufficient permissions to perform this action.

    SubscriptionPermissionDenied403:
      description: Client does not have sufficient permission
      headers:
        x-correlator:
          $ref: "#/components/headers/x-correlator"
      content:
        application/json:
          schema:
            allOf:
              - $ref: "#/components/schemas/ErrorInfo"
              - type: object
                properties:
                  status:
                    enum:
                      - 403
                  code:
                    enum:
                      - PERMISSION_DENIED
                      - SUBSCRIPTION_MISMATCH
          examples:
            GENERIC_403_PERMISSION_DENIED:
              description: Permission denied. OAuth2 token access does not have the required scope or when the user fails operational security
              value:
                status: 403
                code: PERMISSION_DENIED
                message: Client does not have sufficient permissions to perform this action.
            GENERIC_403_SUBSCRIPTION_MISMATCH:
              description: Inconsistent access token for requested subscription
              value:
                status: 403
                code: "SUBSCRIPTION_MISMATCH"
                message: "Inconsistent access token for requested events subscription"

    Generic404:
      description: Resource Not Found
      headers:
        x-correlator:
          $ref: "#/components/headers/x-correlator"
      content:
        application/json:
          schema:
            allOf:
              - $ref: "#/components/schemas/ErrorInfo"
              - type: object
                properties:
                  status:
                    enum:
                      - 404
                  code:
                    enum:
                      - NOT_FOUND
          examples:
            GENERIC_404_NOT_FOUND:
              description: Resource is not found
              value:
                status: 404
                code: NOT_FOUND
                message: The specified resource is not found.

    Generic409:
      description: Conflict
      headers:
        x-correlator:
          $ref: "#/components/headers/x-correlator"
      content:
        application/json:
          schema:
            allOf:
              - $ref: "#/components/schemas/ErrorInfo"
              - type: object
                properties:
                  status:
                    enum:
                      - 409
                  code:
                    enum:
                      - ABORTED
                      - ALREADY_EXISTS
          examples:
            GENERIC_409_ABORTED:
              description: Concurreny of processes of the same nature/scope
              value:
                status: 409
                code: ABORTED
                message: Concurrency conflict.
            GENERIC_409_ALREADY_EXISTS:
              description: Trying to create an existing resource
              value:
                status: 409
                code: ALREADY_EXISTS
                message: The resource that a client tried to create already exists.

    Generic410:
      description: Gone
      headers:
        x-correlator:
          $ref: "#/components/headers/x-correlator"
      content:
        application/json:
          schema:
            allOf:
              - $ref: "#/components/schemas/ErrorInfo"
              - type: object
                properties:
                  status:
                    enum:
                      - 410
                  code:
                    enum:
                      - GONE
          examples:
            GENERIC_410_GONE:
              description: Use in notifications flow to allow API Consumer to indicate that its callback is no longer available
              value:
                status: 410
                code: GONE
                message: Access to the target resource is no longer available.

    CreateSubscriptionUnprocessableEntity422:
      description: Unprocessable Entity
      headers:
        x-correlator:
          $ref: "#/components/headers/x-correlator"
      content:
        application/json:
          schema:
            allOf:
              - $ref: "#/components/schemas/ErrorInfo"
              - type: object
                properties:
                  status:
                    enum:
                      - 422
                  code:
                    enum:
                      - SERVICE_NOT_APPLICABLE
                      - MISSING_IDENTIFIER
                      - UNSUPPORTED_IDENTIFIER
                      - UNNECESSARY_IDENTIFIER
                      - MULTIEVENT_SUBSCRIPTION_NOT_SUPPORTED
          examples:
            GENERIC_422_SERVICE_NOT_APPLICABLE:
              description: Service not applicable for the provided identifier
              value:
                status: 422
                code: SERVICE_NOT_APPLICABLE
                message: The service is not available for the provided identifier.
            GENERIC_422_MISSING_IDENTIFIER:
              description: An identifier is not included in the request and the device or phone number identification cannot be derived from the 3-legged access token
              value:
                status: 422
                code: MISSING_IDENTIFIER
                message: The device cannot be identified.
            GENERIC_422_UNSUPPORTED_IDENTIFIER:
              description: None of the provided identifiers is supported by the implementation
              value:
                status: 422
                code: UNSUPPORTED_IDENTIFIER
                message: The identifier provided is not supported.
            GENERIC_422_UNNECESSARY_IDENTIFIER:
              description: An explicit identifier is provided when a device or phone number has already been identified from the access token
              value:
                status: 422
                code: UNNECESSARY_IDENTIFIER
                message: The device is already identified by the access token.
            GENERIC_422_MULTIEVENT_SUBSCRIPTION_NOT_SUPPORTED:
              description: Multi event types subscription is not supported
              value:
                status: 422
                code: MULTIEVENT_SUBSCRIPTION_NOT_SUPPORTED
                message: Multi event types subscription not managed

    Generic429:
      description: Too Many Requests
      headers:
        x-correlator:
          $ref: "#/components/headers/x-correlator"
      content:
        application/json:
          schema:
            allOf:
              - $ref: "#/components/schemas/ErrorInfo"
              - type: object
                properties:
                  status:
                    enum:
                      - 429
                  code:
                    enum:
                      - QUOTA_EXCEEDED
                      - TOO_MANY_REQUESTS
          examples:
            GENERIC_429_QUOTA_EXCEEDED:
              description: Request is rejected due to exceeding a business quota limit
              value:
                status: 429
                code: QUOTA_EXCEEDED
                message: Out of resource quota.
            GENERIC_429_TOO_MANY_REQUESTS:
              description: Access to the API has been temporarily blocked due to rate or spike arrest limits being reached
              value:
                status: 429
                code: TOO_MANY_REQUESTS
                message: Rate limit reached.

  examples:
    REACHABILITY_DATA:
      value:
        id: "123656"
        source: https://notificationSendServer12.supertelco.com
        type: org.camaraproject.device-reachability-status-subscriptions.v0.reachability-data
        specversion: "1.0"
        datacontenttype: application/json
        data:
          device:
            phoneNumber: "+123456789"
          subscriptionId: qs15-h556-rt89-1298
        time: "2023-01-19T13:18:23.682Z"

    REACHABILITY_SMS:
      value:
        id: "123656"
        source: https://notificationSendServer12.supertelco.com
        type: org.camaraproject.device-reachability-status-subscriptions.v0.reachability-sms
        specversion: "1.0"
        datacontenttype: application/json
        data:
          device:
            phoneNumber: "+123456789"
          subscriptionId: qs15-h556-rt89-1298
        time: "2023-01-19T13:18:23.682Z"

    REACHABILITY_DISCONNECTED:
      value:
        id: "123656"
        source: https://notificationSendServer12.supertelco.com
        type: org.camaraproject.device-reachability-status-subscriptions.v0.reachability-disconnected
        specversion: "1.0"
        datacontenttype: application/json
        data:
          device:
            phoneNumber: "+123456789"
          subscriptionId: qs15-h556-rt89-1298
        time: "2023-01-19T13:18:23.682Z"

    SUBSCRIPTION_ENDED:
      description: The cloud event when a device reachability status subscription ends.
      value:
        id: "123658"
        source: https://notificationSendServer12.supertelco.com
        type: org.camaraproject.device-reachability-status-subscriptions.v0.subscription-ended
        specversion: "1.0"
        datacontenttype: application/json
        data:
          device:
            phoneNumber: "+123456789"
          terminationReason: SUBSCRIPTION_EXPIRED
          subscriptionId: qs15-h556-rt89-1298
          terminationDescription: Subscription expiry time has been reached
        time: "2024-03-22T05:40:23.682Z"

    SUBSCRIPTION_STARTED:
      description: The cloud event when a device reachability status subscription was started.
      value:
        id: "124003"
        source: https://notificationSendServer12.supertelco.com
        type: org.camaraproject.device-reachability-status-subscriptions.v0.subscription-started
        specversion: "1.0"
        datacontenttype: application/json
        data:
          initiationReason: SUBSCRIPTION_CREATED
          subscriptionId: qs15-h556-rt89-1298
          device:
            phoneNumber: "+123456789"
        time: "2024-03-05T15:00:23.682Z"

    SUBSCRIPTION_UPDATED:
      description: The cloud event when a device reachability status subscription was updated.
      value:
        id: "124773"
        source: https://notificationSendServer12.supertelco.com
        type: org.camaraproject.device-reachability-status-subscriptions.v0.subscription-updated
        specversion: "1.0"
        datacontenttype: application/json
        data:
          updateReason: SUBSCRIPTION_ACTIVE
          subscriptionId: qs15-h556-rt89-1298
          device:
            phoneNumber: "+123456789"
        time: "2024-03-05T15:00:23.682Z"

    ACTIVE_SUBSCRIPTION:
      value:
        id: 550e8400-e29b-41d4-a716-446655440000
        sink: https://endpoint.example.com/sink
        protocol: HTTP
        types:
          - "org.camaraproject.device-reachability-status-subscriptions.v0.reachability-data"
        config:
          subscriptionDetail: {}
          subscriptionExpireTime: "2024-07-17T13:18:23.682Z"
          subscriptionMaxEvents: 5
          initialEvent: true
        startsAt: "2024-07-03T21:12:02.871Z"
        expiresAt: "2024-07-03T21:12:02.871Z"
        status: ACTIVE

    ACTIVE_SUBSCRIPTION_WITH_DEVICE_DISAMBIGUATION:
      value:
        id: 550e8400-e29b-41d4-a716-446655440000
        sink: https://endpoint.example.com/sink
        protocol: HTTP
        types:
          - "org.camaraproject.device-reachability-status-subscriptions.v0.reachability-data"
        config:
          subscriptionDetail:
            device:
              phoneNumber: "+123456789"
          subscriptionExpireTime: "2024-07-17T13:18:23.682Z"
          subscriptionMaxEvents: 5
          initialEvent: true
        startsAt: "2024-07-03T21:12:02.871Z"
        expiresAt: "2024-07-03T21:12:02.871Z"
        status: ACTIVE

    SUBSCRIPTION_ACTIVATION_REQUESTED:
      value:
        id: 550e8400-e29b-41d4-a716-446655440000
        sink: https://endpoint.example.com/sink
        protocol: HTTP
        types:
          - "org.camaraproject.device-reachability-status-subscriptions.v0.reachability-data"
        config:
          subscriptionDetail: {}
          subscriptionExpireTime: "2024-07-17T13:18:23.682Z"
          subscriptionMaxEvents: 5
          initialEvent: true
        startsAt: "2024-07-03T21:12:02.871Z"
        expiresAt: "2024-07-03T21:12:02.871Z"
        status: ACTIVATION_REQUESTED

    SUBSCRIPTION_DELETED:
      value:
        id: 550e8400-e29b-41d4-a716-446655440000
        sink: https://endpoint.example.com/sink
        protocol: HTTP
        types:
          - "org.camaraproject.device-reachability-status-subscriptions.v0.reachability-data"
        config:
          subscriptionDetail: {}
          subscriptionExpireTime: "2024-07-17T13:18:23.682Z"
          subscriptionMaxEvents: 5
          initialEvent: true
        startsAt: "2024-07-03T21:12:02.871Z"
        expiresAt: "2024-07-03T21:12:02.871Z"
        status: DELETED

    CREATE_SUBSCRIPTION:
      value:
        sink: "https://endpoint.example.com/sink"
        sinkCredential: {
          "credentialType": "ACCESSTOKEN",
          "accessToken": "xxx",
          "accessTokenExpiresUtc": "2024-02-17T16:23:45Z",
          "accessTokenType": "bearer"
        }
        protocol: HTTP
        types: [
          "org.camaraproject.device-reachability-status-subscriptions.v0.reachability-data"
        ]
        config: {
          "subscriptionDetail": {
            "device": {
              "phoneNumber": "+123456789",
            }
          },
          "subscriptionExpireTime": "2023-01-17T13:18:23.682Z",
          "subscriptionMaxEvents": 5,
          "initialEvent": true
        }

    SUBSCRIPTION_LIST:
      description: A list of API consumer subscriptions. If a 3-legged access token is used, the list is specific to the device associated with that token.
      value:
        - id: 550e8400-e29b-41d4-a716-446655440000
          sink: https://endpoint.example.com/sink
          protocol: HTTP
          types:
            - "org.camaraproject.device-reachability-status-subscriptions.v0.reachability-data"
          config:
            subscriptionDetail: {}
            subscriptionExpireTime: "2024-07-17T13:18:23.682Z"
            subscriptionMaxEvents: 5
            initialEvent: true
          startsAt: "2024-07-03T21:12:02.871Z"
          expiresAt: "2024-07-03T21:12:02.871Z"
          status: ACTIVE

    EMPTY_SUBSCRIPTION_LIST:
      description: The API consumer either has no subscriptions or, if a 3-legged access token is used, has none for the device associated with that token.
      value: []
```