openapi: 3.2.0
info:
  version: v1.0
  title: MTN Customer Management Link Accounts API
  description: An API to register MoMo on Tier 0 for BSS. Please refer to the reference guides https://developers.mtn.com/API-Reference-Guides and Response and Error Codes documents https://developers.mtn.com/ResponseCodes
servers:
- url: https://api.mtn.com/v1/customerManagement
tags:
- name: Link Accounts
paths:
  /momo/tier0/{id}/link/account:
    post:
      description: Link a newly created account to an existing one
      summary: Link a newly created wallet to an existing extended account holder data
      tags:
      - Link Accounts
      parameters:
      - name: X-Authorization
        in: header
        description: An authorization key to be provided
        schema:
          type: string
      - name: id
        in: path
        required: true
        description: ID of an already existing extended account holder. ie. MSISDN
        schema:
          type: string
      - name: transactionId
        in: header
        x-example: xxxxxxx
        schema:
          type: string
      - name: targetSystem
        in: header
        x-example: ECW
        required: false
        schema:
          type: string
      responses:
        200:
          description: Registration Response. For a successful request, it will contain the transaction id and status of Registration.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/MomoRegistrationResponse'
        400:
          description: Bad Request
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/APIError'
        409:
          description: Conflict. ID already exists as a subscriber
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/APIError'
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/LinkAccountData'
components:
  schemas:
    AccountHolderRegistrationData:
      type: object
      required:
      - msisdn
      - username
      - email
      properties:
        accountHolderId:
          type: string
          description: A uniquie identifier or an account number of the accounts to be linked
          example: 0100002009300
        profileName:
          type: string
          description: A description of the account to be registered and linked, profile details
        timeout:
          type: number
          description: A timeout in seconds
          default: 30
        bankDomainName:
          type: string
          description: Name of the bank eg. EcoBank
          example: EcoBank, AccessBank
    APIError:
      type: object
      required:
      - statusMessage
      - supportMessage
      - transactionId
      - timestamp
      - path
      - method
      properties:
        statusMessage:
          type: string
        supportMessage:
          type: string
        transactionId:
          type: string
        timestamp:
          type: string
          example: '2020-08-19 09:09:09'
        path:
          type: string
          description: endpoint path used to make request
        method:
          type: string
          description: HTTP Method used to make request
          example: GET
    MomoRegistrationResponse:
      type: object
      required:
      - accountHolderIdentity
      - accountHolderIdentityType
      - statusCode
      - transactionId
      properties:
        accountHolderIdentity:
          type: string
          description: The ID of resource created
          example: '9230088'
        accountHolderIdentityType:
          type: string
          description: The type of ID for the resource created
          example: ID
        statusCode:
          type: string
          description: The status code for operation
          example: '0000'
        transactionId:
          type: string
          description: The transaction Id created for the request
          example: A3344098765456
    DocumentReferenceInformationListData:
      type: object
      properties:
        documentReferenceNumber:
          type: string
        documentName:
          type: string
    LinkAccountData:
      type: object
      required:
      - registrationDetails
      properties:
        registrationDetails:
          type: object
          description: Information of the account holder's secondary account to be created and linked to an existing account
          $ref: '#/components/schemas/AccountHolderRegistrationData'
        languageCode:
          type: string
          description: An optional valid language code
        quoteId:
          type: string
          description: ID of the quote to use
        additionInformationList:
          type: array
          items:
            $ref: '#/components/schemas/AdditionalInformationListData'
        docReferenceInformationList:
          type: array
          description: Contains reference information about a KYC document stored on an external document system
          items:
            $ref: '#/components/schemas/DocumentReferenceInformationListData'
    AdditionalInformationListData:
      type: object
      description: Any other information of the account holder
      properties:
        firstName:
          type: string
        lastName:
          type: string
        contactNumber:
          type: string
        otherName:
          type: string
          description: Other name of the account holder
        residentialAddress:
          type: string
  securitySchemes:
    ApiKeyAuth:
      type: apiKey
      name: X-API-Key
      in: header