openapi: 3.0.3
info:
  title: Device Swap
  description: |
      This API allows to check the last time that the phone (device) - phone number association has changed

      # Introduction

        The Device Swap API performs real-time checks on the last Device Swap event, providing real-time information about whether the SIM card associated with a user's phone number has been transferred to a different physical device.

        Device Swap information can be invaluable for enhancing security, fraud detection, and ensuring compliance with regulatory requirements in various applications, apart from providing useful information of device upgrade trends in user segments.

        This API is used by an application to get information about a mobile line's latest Device Swap date. It can be easily integrated and used through this secured API and allows API consumers to get this information in an easy and secured way. The API provides management of 2 endpoints answering 2 distinct questions:

        * When did the last Device Swap occur?
        * Has a Device Swap occurred during the last n hours?

      # Relevant terms and definitions

      **Device Swap:** A Device Swap is a process in which the association between a user's mobile phone number (MSISDN) and a device (IMEI) is created for the first time or changes for any reasons.

      # API Functionality

      The Device Swap API provides a programmable interface for developers and other users (capabilities consumers) to request the last date of a device swap performed on the mobile line, or, to check whether a device swap has been performed during a past period.

      The API provides 2 operations:

      - POST retrieve-date: Provides timestamp of latest device swap, if any, for a given phone number.
          - If no swap has been performed and the network operator supports unlimited DeviceSwap monitoring timeframe, the API will return the first phone number usage in a device (the timestamp of the first time that the phone number was connected to the network, it is, the first time that the SIM is installed in a device).
          - If the latest device swap date (or the first phone number usage, if no device swap) cannot be communicated due to local regulations (or Network Operator internal privacy policies) preventing the safekeeping of the information for longer than the stated period, a `null` value will be returned. Optionally, a `monitoredPeriod` could be provided to indicate monitored time frame (in days) supported by the Network Operator. In this case the response must be treated as "there were no device swap events during 'monitoredPeriod'. Either the parameter is optional, it is recommended to support it in DeviceSwap implementations.
      - POST check: Checks if device swap has been performed during a past period (defined in the request with 'maxAge' attribute) for a given phone number, the API will return boolean response (true/false), indicating that the device has been swapped or not in the specified period. In case the phone number has never been installed in a device, or no data is available in the operators records (e.g. database error), API will return a 422 error.

      # Identifying the phone number from the access token

      This API requires the API consumer to identify a phone number as the subject of the API. There is 2 ways to retrieve it depending on the authorization flow used:
      - When the API is invoked using a two-legged access token, the phone number will be identified from the optional `phoneNumber` identifier, which therefore MUST be provided.
      - When a three-legged access token is used however, this optional `phoneNumber` identifier MUST NOT be provided, as the phone number 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 phoneNumber cannot be identified from the access token and the optional `phoneNumber` identifier is not included in the request, then the server will return an error with the `422 MISSING_IDENTIFIER` error code.

      - If the phoneNumber can be identified from the access token and the optional `phoneNumber` identifier 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.

      # 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.

      # 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/DeviceSwap

servers:
  - url: '{apiRoot}/device-swap/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: Retrieve Device Swap Date
    description: Receive the last date in which the device of the end-user was swapped
  - name: Check Device Swap
    description: Validate if the SIM of the end-user has been installed in a different device during a past period
paths:
  /retrieve-date:
    post:
      tags:
        - Retrieve Device Swap Date
      summary: Get last device swap date
      description: Get timestamp of last device swap for a mobile user account provided with phone number.
      operationId: retrieveDeviceSwapDate
      security:
        - openId:
            - device-swap
        - openId:
            - device-swap:retrieve-date
      parameters:
        - $ref: '#/components/parameters/x-correlator'
      requestBody:
        description: |
          Create a device swap date request for a phone number.
        content:
          application/json:
            schema:
              $ref: "#/components/schemas/CreateDeviceSwapDate"
            examples:
              RETRIEVE_3LEGS:
                $ref: "#/components/examples/RETRIEVE_3LEGS"
              RETRIEVE_2LEGS:
                $ref: "#/components/examples/RETRIEVE_2LEGS"
        required: true
      responses:
        "200":
          description: Contains information about Device swap change
          headers:
            x-correlator:
              $ref: '#/components/headers/x-correlator'
          content:
            application/json:
              schema:
                $ref: "#/components/schemas/DeviceSwapInfo"
              examples:
                RETRIEVE_DATE:
                  $ref: "#/components/examples/RETRIEVE_DATE"
                RETRIEVE_MONITORED_PERIOD:
                  $ref: "#/components/examples/RETRIEVE_MONITORED_PERIOD"
                RETRIEVE_MONITORED_NULL:
                  $ref: "#/components/examples/RETRIEVE_MONITORED_NULL"
        "400":
          $ref: "#/components/responses/Generic400"
        "401":
          $ref: "#/components/responses/Generic401"
        "403":
          $ref: "#/components/responses/Generic403"
        "404":
          $ref: "#/components/responses/Generic404"
        "422":
          $ref: "#/components/responses/Generic422"
  /check:
    post:
      tags:
        - Check Device Swap
      summary: Check last device swap date
      description: Check if device swap has been performed during a past period
      operationId: checkDeviceSwap
      security:
        - openId:
            - device-swap
        - openId:
            - device-swap:check
      parameters:
        - $ref: '#/components/parameters/x-correlator'
      requestBody:
        required: true
        description: |
          Create a check device swap request for a phone number.
        content:
          application/json:
            schema:
              $ref: "#/components/schemas/CreateCheckDeviceSwap"
            examples:
              CHECK_3LEGS:
                $ref: "#/components/examples/CHECK_3LEGS"
              CHECK_2LEGS:
                $ref: "#/components/examples/CHECK_2LEGS"
      responses:
        "200":
          description: Returns whether a device swap has been performed during a past period
          headers:
            x-correlator:
              $ref: '#/components/headers/x-correlator'
          content:
            application/json:
              schema:
                $ref: "#/components/schemas/CheckDeviceSwapInfo"
        "400":
          $ref: "#/components/responses/Generic400Check"
        "401":
          $ref: "#/components/responses/Generic401"
        "403":
          $ref: "#/components/responses/Generic403"
        "404":
          $ref: "#/components/responses/Generic404"
        "422":
          $ref: "#/components/responses/Generic422"
components:
  securitySchemes:
    openId:
      type: openIdConnect
      openIdConnectUrl: https://example.com/.well-known/openid-configuration
  parameters:
    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:
        $ref: "#/components/schemas/XCorrelator"
  schemas:
    XCorrelator:
      type: string
      pattern: ^[a-zA-Z0-9-_:;.\/<>{}]{0,256}$
      example: "b4333c46-49c0-4f62-80d7-f0ef930f1c46"
    DeviceSwapInfo:
      type: object
      required:
        - latestDeviceChange
      properties:
        latestDeviceChange:
          type: string
          format: date-time
          description: Timestamp of latest device swap performed. It must follow [RFC 3339](https://datatracker.ietf.org/doc/html/rfc3339#section-5.6) and must have time zone.
          nullable: true
          example: "2023-07-03T14:27:08.312+02:00"
        monitoredPeriod:
          type: integer
          description: Timeframe in days for device change supervision for the phone number. It could be valued in the response if the latest Device swap occurred before this monitored period.
          example: 120
    CreateDeviceSwapDate:
      type: object
      properties:
        phoneNumber:
          $ref: "#/components/schemas/PhoneNumber"
    CreateCheckDeviceSwap:
      type: object
      properties:
        phoneNumber:
          $ref: "#/components/schemas/PhoneNumber"
        maxAge:
          type: integer
          example: 240
          description: |
            Period in hours to be checked for device swap.
          format: int32
          minimum: 1
          maximum: 2400
          default: 240
    PhoneNumber:
      type: string
      pattern: '^\+[1-9][0-9]{4,14}$'
      example: '+34666111333'
      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 '+'.
    CheckDeviceSwapInfo:
      type: object
      required:
        - swapped
      properties:
        swapped:
          type: boolean
          description: Indicates whether the device has been swapped during the period within the provided age.
    ErrorInfo:
      type: object
      required:
        - status
        - code
        - message
      properties:
        message:
          type: string
          description: A human-readable description of what the event represents
        status:
          type: integer
          description: HTTP response status code
        code:
          type: string
          description: A human-readable code to describe the error
  responses:
    Generic400:
      description: Bad 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.
    Generic400Check:
      description: Bad 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
          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.
    Generic401:
      description: Unauthorized
      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
              value:
                status: 401
                code: UNAUTHENTICATED
                message: Request not authenticated due to missing, invalid, or expired credentials.
    Generic403:
      description: Forbidden
      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.
    Generic404:
      description: 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
                      - IDENTIFIER_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.
            GENERIC_404_IDENTIFIER_NOT_FOUND:
              description: Some identifier cannot be matched to a device
              value:
                status: 404
                code: IDENTIFIER_NOT_FOUND
                message: Device identifier not found.
    Generic422:
      description: Unprocessable Content
      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
                      - UNNECESSARY_IDENTIFIER
          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: phone number is not included in the request (in case of 2-legged) or the phone number identification cannot be derived from access token (in 3-legged)
              value:
                status: 422
                code: MISSING_IDENTIFIER
                message: The device cannot be identified.
            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.
    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: Rejected due to exceeding a business quota limit.
            GENERIC_429_TOO_MANY_REQUESTS:
              description: API Server request limit is overpassed
              value:
                status: 429
                code: TOO_MANY_REQUESTS
                message: Rejected due to request rate limit overpassed.
  examples:
    RETRIEVE_DATE:
      summary: Lastest Device swap date is send back
      value:
        latestDeviceChange: 2024-09-18T07:37:53.471829447Z
    RETRIEVE_MONITORED_NULL:
      summary: Only null value is retrieved
      value:
        latestDeviceChange: null
    RETRIEVE_MONITORED_PERIOD:
      summary: null is send back for the date but a monitoredPeriod is provided
      value:
        latestDeviceChange: null
        monitoredPeriod: 120
    CHECK_2LEGS:
      summary: Check request without 3-legged access tokens
      value:
        phoneNumber: "+346661113334"
        maxAge: 120
    CHECK_3LEGS:
      summary: Check request with 3-legged access tokens
      value:
        maxAge: 120
    RETRIEVE_2LEGS:
      summary: Retrieve request without 3-legged access tokens
      value:
        phoneNumber: "+346661113334"
    RETRIEVE_3LEGS:
      summary: Retrieve request with 3-legged access tokens
      value:
        {}