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# device-visit-location

```yaml
---
openapi: 3.0.3
info:
  title: Device Visit Location
  description: >
    The Device Visit Location API provides customers with the ability
    to query the visit locations of a device during a certain time period.

    # Introduction

    This API can return the visited location of a device at a certain time, and the visited location is returned as a list of geoCode objects.

    This API can be used in the following scenarios.\

    **Anti fraud**: for some scenarios involving high-risk financial operations (such as cross-border transfers, large investments, etc.), by monitoring changes in the location visited by mobile phone numbers, potential fraudulent behavior can be detected in advance. For example, when a user usually only operates in a few provinces within the country, but suddenly has access records from overseas or unfamiliar high-risk provinces, and there are also signs of abnormal fund flow, preventive measures can be taken quickly.\

    **Identity verification**: In the financial field, when users perform high-risk operations such as large transfers or changing important account information, in addition to conventional verification methods such as passwords and verification codes, identity verification can also be carried out by combining their phone number with the province they recently visited.\

    **Remote abnormal operation detection**: For the account security management of e-commerce platforms, when users perform login, password modification, payment and other operations, they can use this api to detect whether there are abnormal operations in remote locations.

    # 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 (user equipment) out of four options: IPv4 address, IPv6 address, Phone number, or Network Access Identifier (not supported for this API version) assigned by the mobile network operator for the device.
    * **geoCode**: An object with the following attributes:
      - **countryCode**: The code of the country.Following the `ISO 3166 ALPHA-2` standard.
      - **codeType**: The type of code, such as "PostlCode".
      - **codeValue**: The actual value of the code.
    # API Functionality

    Once the API Consumer provides the device infomation and specifies the time window, the API queries the relevant data. The data is retrieved from the stored information within the selected time window. The result is returned as a list of geoCode objects representing the visited locations.

    ## Detailed Explanation of GeoCode Object

    **CountyCode**: This is a string type field used to specify the country code where the location is located. Following the `ISO 3166 ALPHA-2` standard, for example, "CN" represents China, "US" represents the United States, etc. On a global scale, this code ensures accurate differentiation of different countries and is an important foundational information for positioning, helping to quickly filter and identify location data for specific countries in cross-border business or data analysis.\

    **codeType**: String type, used to specify the geographic encoding type used, with a fixed value of `PostlCode` in the current version. This field is designed to facilitate future expansion for different geographic coding systems, allowing capability providers to select the appropriate coding type for return based on actual situations.\

    **codeValue**: String type, representing the specific encoding value of the corresponding codeType. For example, when codeType is `Postal Code`, codeValue may be a postal code similar to "100000". It, together with the countryCode and codeType, forms a complete location identifier that accurately points to a specific geographic area.

    # Identifying a device from the access token

    This specification defines the `device` object field as optional in API requests, specifically in cases where the API is accessed using a 3-legged access token, and the device can be uniquely identified by the token. This approach simplifies API usage for API consumers by relying on the device information associated with the access token used to invoke the API.

    ## Handling of device information:

    ### Optional device object for 3-legged tokens:

    - When using a 3-legged access token, the device associated with the access token must be considered as the device for the API request. This means that the device object is not required in the request, and if included it must identify the same device, therefore **it is recommended NOT to include it in these scenarios** to simplify the API usage and avoid additional validations.

    ### Validation mechanism:

    - The server will extract the device identification from the access token, if available.

    - If the API request additionally includes a `device` object when using a 3-legged access token, the API will validate that the device identifier provided matches the one associated with the access token.

    - If there is a mismatch, the API will respond with a `403 - INVALID_TOKEN_CONTEXT` error, indicating that the device information in the request does not match the token.

    ### Error handling for unidentifiable devices:

    - If the `device` object is not included in the request and the device information cannot be derived from the 3-legged access token, the server will return a 422 `UNIDENTIFIABLE_DEVICE` error.

    ### Restrictions for tokens without an associated authenticated identifier:

    - For scenarios which do not have a single device identifier associated to the token during the authentication flow, e.g. 2-legged access tokens, the `device` object MUST be provided in the API request. This ensures that the device identification is explicit and valid for each API call made with these tokens.
  termsOfService: http://swagger.io/terms/
  contact:
    email: sp-location-insights@lists.camaraproject.org
  license:
    name: Apache 2.0
    url: https://www.apache.org/licenses/LICENSE-2.0.html
  version: wip
  x-camara-commonalities: 0.5
externalDocs:
  description: Product documentation at CAMARA
  url: https://github.com/camaraproject/
servers:
  - url: "{apiRoot}/device-visit-location/vwip"
    variables:
      apiRoot:
        default: http://localhost:9091
        description: API root
tags:
  - name: DeviceVisitLocation
    description: Operations to retrieve device visit location information.
paths:
  /retrieve:
    post:
      security:
        - openId:
            - device-visit-location:retrieve
      tags:
        - DeviceVisitLocation
      summary: Retrieves device visit location information
      description: Retrieves the latest visit locations of a device within a given
        time window.
      operationId: retrieveDeviceVisitLocation
      parameters:
        - $ref: "#/components/parameters/x-correlator"
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: "#/components/schemas/RetrieveVisitLocationRequest"
            example:
              device:
                phoneNumber: "+123456789"
              startTime: 2024-04-23T14:44:18.165Z
              endTime: 2024-04-30T14:44:18.165Z
      responses:
        "200":
          description: Device Visit Location query result
          content:
            application/json:
              schema:
                $ref: "#/components/schemas/RetrieveVisitLocationResponse"
              example:
                geoCodeList:
                  - countryCode: CN
                    codeType: PostalCode
                    codeValue: "110000"
                  - countryCode: CN
                    codeType: PostalCode
                    codeValue: "310000"
          headers:
            x-correlator:
              $ref: "#/components/headers/x-correlator"
        "400":
          $ref: "#/components/responses/RetrieveVisitLocationBadRequest400"
        "401":
          $ref: "#/components/responses/Generic401"
        "403":
          $ref: "#/components/responses/Generic403"
        "404":
          $ref: "#/components/responses/RetrieveVisitLocationNotFound404"
        "422":
          $ref: "#/components/responses/Generic422"
        "500":
          $ref: "#/components/responses/Generic500"
        "503":
          $ref: "#/components/responses/Generic503"
        "504":
          $ref: "#/components/responses/Generic504"
components:
  securitySchemes:
    openId:
      type: openIdConnect
      description: to support Consent Management
      openIdConnectUrl: https://example.com/.well-known/openid-configuration
  parameters:
    x-correlator:
      name: x-correlator
      in: header
      description: Correlation id for the different services
      schema:
        type: string
        pattern: ^[a-zA-Z0-9-]{1,55}$
  headers:
    x-correlator:
      description: Correlation id for the different services
      schema:
        type: string
        pattern: ^[a-zA-Z0-9-]{1,55}$
  schemas:
    RetrieveVisitLocationRequest:
      type: object
      description: Request with a device as identifier,starttime and endtime
      required:
        - startTime
        - endTime
      properties:
        device:
          $ref: "#/components/schemas/Device"
        startTime:
          type: string
          format: date-time
          description: Start date time of the time window. If not provided, the default is
            the past seven days from the request time. 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.
        endTime:
          type: string
          format: date-time
          description: End date time of the time window. If not provided, the default is
            the past seven days from the request time. 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.
    RetrieveVisitLocationResponse:
      type: object
      description: Contains the list of geoCode objects representing the visited locations.
      required:
        - geoCodeList
      properties:
        geoCodeList:
          type: array
          items:
            $ref: "#/components/schemas/geoCode"
          minItems: 1
    geoCode:
      type: object
      properties:
        countryCode:
          type: string
          description: Code for the country where the location is is located. Following
            the `ISO 3166 ALPHA-2` standard, for example, "CN" represents China,
            "US" represents the United States, etc.
        codeType:
          type: string
          description: The type of code.This field is used to specify the geographic
            encoding type used, with a fixed value of `PostlCode` in the current
            version.
        codeValue:
          type: string
          description: The actual value of the code,representing the specific encoding
            value of the corresponding codeType.
      required:
        - countryCode
        - codeType
        - codeValue
    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`

        NOTE1: 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.

        NOTE2: for the Commonalities release v0.4, we are enforcing that the networkAccessIdentifier is only part of the schema for future-proofing, and CAMARA does not currently allow its use. After the CAMARA meta-release work is concluded and the relevant issues are resolved, its use will need to be explicitly documented in the guidelines.
      type: object
      properties:
        phoneNumber:
          $ref: "#/components/schemas/PhoneNumber"
        networkAccessIdentifier:
          $ref: "#/components/schemas/NetworkAccessIdentifier"
        ipv4Address:
          $ref: "#/components/schemas/DeviceIpv4Addr"
        ipv6Address:
          $ref: "#/components/schemas/DeviceIpv6Address"
      minProperties: 1
    PhoneNumber:
      description: A public identifier addressing a telephone subscription. In mobile
        networks it corresponds to the MSISDN (Mobile Station International
        Subscriber Directory Number). In order to be globally unique it has to
        be formatted in international format, according to E.164 standard,
        prefixed with '+'.
      type: string
      pattern: ^\+[1-9][0-9]{4,14}$
      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@domain.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
    ErrorInfo:
      type: object
      description: Error information
      required:
        - message
        - status
        - code
      properties:
        message:
          type: string
          description: A human readable description of what the event represent
        status:
          type: integer
          description: HTTP response status code
        code:
          type: string
          description: Friendly Code to describe the error
  responses:
    RetrieveVisitLocationBadRequest400:
      description: >-
        Bad Request.

        In addition to regular scenario of `INVALID_ARGUMENT`, other scenarios may exist:

        - Indicated endTime is earlier than the startTime ("code": "DEVICE_VISIT_LOCATION.INVALID_END_DATE","message": "Indicated endTime is earlier than the startTime.")
      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
                      - DEVICE_VISIT_LOCATION.INVALID_END_DATE
          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_INVALID_END_DATE:
              value:
                status: 400
                code: DEVICE_VISIT_LOCATION.INVALID_END_DATE
                message: Indicated endTime is earlier than the startTime.
    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
                      - AUTHENTICATION_REQUIRED
          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.
            GENERIC_401_AUTHENTICATION_REQUIRED:
              description: New authentication is needed, authentication is no longer valid
              value:
                status: 401
                code: AUTHENTICATION_REQUIRED
                message: New authentication is required.
    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
                      - INVALID_TOKEN_CONTEXT
          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_INVALID_TOKEN_CONTEXT:
              description: Reflect some inconsistency between information in some field of the
                API and the related OAuth2 Token
              value:
                status: 403
                code: INVALID_TOKEN_CONTEXT
                message: "{{field}} is not consistent with access token."
    RetrieveVisitLocationNotFound404:
      description: >-
        Not found.

        In addition to regular scenario of `NOT_FOUND`, other scenarios may exist:

        - Device identifier not found ("code": "DEVICE_NOT_FOUND","message": "Device identifier not found.").

        - Unable to find the visit location information of the device within the given time window, it may be due to the device being offline ("code": "DEVICE_VISIT_LOCATION.DATA_NOT_FOUND","message": "Unable to find the visit location information of the device within the given time window").
      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
                      - DEVICE_VISIT_LOCATION.DATA_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_DEVICE_NOT_FOUND:
              description: Device identifier not found
              value:
                status: 404
                code: IDENTIFIER_NOT_FOUND
                message: Device identifier not found.
            DATA_NOT_FOUND:
              description: Unable to find the visit location information of the device within
                the given time window
              value:
                status: 404
                code: DEVICE_VISIT_LOCATION.DATA_NOT_FOUND
                message: Unable to find the visit location information of the device within the
                  given time window.
    Generic405:
      description: Method Not Allowed
      headers:
        x-correlator:
          $ref: "#/components/headers/x-correlator"
      content:
        application/json:
          schema:
            allOf:
              - $ref: "#/components/schemas/ErrorInfo"
              - type: object
                properties:
                  status:
                    enum:
                      - 405
                  code:
                    enum:
                      - METHOD_NOT_ALLOWED
          examples:
            GENERIC_405_METHOD_NOT_ALLOWED:
              description: Invalid HTTP verb used with a given endpoint
              value:
                status: 405
                code: METHOD_NOT_ALLOWED
                message: The requested method is not allowed/supported on the target resource.
    Generic406:
      description: Not Acceptable
      headers:
        x-correlator:
          $ref: "#/components/headers/x-correlator"
      content:
        application/json:
          schema:
            allOf:
              - $ref: "#/components/schemas/ErrorInfo"
              - type: object
                properties:
                  status:
                    enum:
                      - 406
                  code:
                    enum:
                      - NOT_ACCEPTABLE
          examples:
            GENERIC_406_NOT_ACCEPTABLE:
              description: API Server does not accept the media type (`Accept-*` header)
                indicated by API client
              value:
                status: 406
                code: NOT_ACCEPTABLE
                message: The server cannot produce a response matching the content requested by
                  the client through `Accept-*` headers.
    Generic412:
      description: Failed precondition
      headers:
        x-correlator:
          $ref: "#/components/headers/x-correlator"
      content:
        application/json:
          schema:
            allOf:
              - $ref: "#/components/schemas/ErrorInfo"
              - type: object
                properties:
                  status:
                    enum:
                      - 412
                  code:
                    enum:
                      - FAILED_PRECONDITION
          examples:
            GENERIC_412_FAILED_PRECONDITION:
              description: Indication by the API Server that the request cannot be processed
                in current system state
              value:
                status: 412
                code: FAILED_PRECONDITION
                message: Request cannot be executed in the current system state.
    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:
                      - IDENTIFIER_MISMATCH
                      - SERVICE_NOT_APPLICABLE
                      - MISSING_IDENTIFIER
                      - UNSUPPORTED_IDENTIFIER
                      - UNNECESSARY_IDENTIFIER
          examples:
            GENERIC_422_IDENTIFIER_MISMATCH:
              description: Inconsistency between identifiers not pointing to the same device
              value:
                status: 422
                code: IDENTIFIER_MISMATCH
                message: Provided identifiers are not consistent.
            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.
    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: Either out of resource quota or reaching rate limiting.
            GENERIC_429_TOO_MANY_REQUESTS:
              description: API Server request limit is overpassed
              value:
                status: 429
                code: TOO_MANY_REQUESTS
                message: Either out of resource quota or reaching rate limiting.
    Generic500:
      description: Internal Server Error
      headers:
        x-correlator:
          $ref: "#/components/headers/x-correlator"
      content:
        application/json:
          schema:
            $ref: "#/components/schemas/ErrorInfo"
          examples:
            GENERIC_500_INTERNAL:
              description: Problem in Server side. Regular Server Exception
              value:
                status: 500
                code: INTERNAL
                message: Unknown server error. Typically a server bug.
    Generic501:
      description: Not Implemented
      headers:
        x-correlator:
          $ref: "#/components/headers/x-correlator"
      content:
        application/json:
          schema:
            allOf:
              - $ref: "#/components/schemas/ErrorInfo"
              - type: object
                properties:
                  status:
                    enum:
                      - 501
                  code:
                    enum:
                      - NOT_IMPLEMENTED
          examples:
            GENERIC_501_NOT_IMPLEMENTED:
              description: Service not implemented. The use of this code should be avoided as
                far as possible to get the objective to reach aligned
                implementations
              value:
                status: 501
                code: NOT_IMPLEMENTED
                message: This functionality is not implemented yet.
    Generic502:
      description: Bad Gateway
      headers:
        x-correlator:
          $ref: "#/components/headers/x-correlator"
      content:
        application/json:
          schema:
            allOf:
              - $ref: "#/components/schemas/ErrorInfo"
              - type: object
                properties:
                  status:
                    enum:
                      - 502
                  code:
                    enum:
                      - BAD_GATEWAY
          examples:
            GENERIC_502_BAD_GATEWAY:
              description: Internal routing problem in the Server side that blocks to manage
                the service properly
              value:
                status: 502
                code: BAD_GATEWAY
                message: An upstream internal service cannot be reached.
    Generic503:
      description: Service Unavailable
      headers:
        x-correlator:
          $ref: "#/components/headers/x-correlator"
      content:
        application/json:
          schema:
            allOf:
              - $ref: "#/components/schemas/ErrorInfo"
              - type: object
                properties:
                  status:
                    enum:
                      - 503
                  code:
                    enum:
                      - UNAVAILABLE
          examples:
            GENERIC_503_UNAVAILABLE:
              description: Service is not available. Temporary situation usually related to
                maintenance process in the server side
              value:
                status: 503
                code: UNAVAILABLE
                message: Service Unavailable.
    Generic504:
      description: Gateway Timeout
      headers:
        x-correlator:
          $ref: "#/components/headers/x-correlator"
      content:
        application/json:
          schema:
            allOf:
              - $ref: "#/components/schemas/ErrorInfo"
              - type: object
                properties:
                  status:
                    enum:
                      - 504
                  code:
                    enum:
                      - TIMEOUT
          examples:
            GENERIC_504_TIMEOUT:
              description: API Server Timeout
              value:
                status: 504
                code: TIMEOUT
                message: Request timeout exceeded.
```