Cellulant Checkout, Poll, and Acknowledge

arazzo: 1.0.1
info:
  title: Cellulant Checkout, Poll, and Acknowledge
  summary: Raise an Express Checkout, poll status until paid, then acknowledge delivery back to the platform.
  description: >-
    Closes the loop on a Tingg checkout. The workflow authenticates, creates an
    Express Checkout, polls query-status until a payment is reported, and then
    sends an acknowledgement (Full or Partial) back to the platform with the
    settlement status code so the funds can be released. The acknowledgement
    status_code follows the documented convention — 183 successful, 180
    rejected, 188 received and acknowledged later. Each step inlines its bearer
    token and merchant apikey header.
  version: 1.0.0
sourceDescriptions:
- name: checkoutApi
  url: ../openapi/cellulant-checkout-api-openapi.yml
  type: openapi
workflows:
- workflowId: checkout-poll-and-acknowledge
  summary: Create a checkout, wait for payment, then acknowledge it back to Tingg.
  description: >-
    Authenticates, raises an Express Checkout, polls until a payment settles,
    and acknowledges the delivered status to the platform.
  inputs:
    type: object
    required:
    - clientId
    - clientSecret
    - apiKey
    - merchantTransactionId
    - serviceCode
    - countryCode
    - currencyCode
    - requestAmount
    - callbackUrl
    - acknowledgementType
    - acknowledgmentReference
    - statusCode
    properties:
      clientId:
        type: string
        description: OAuth client id issued in the Tingg dashboard.
      clientSecret:
        type: string
        description: OAuth client secret issued in the Tingg dashboard.
      apiKey:
        type: string
        description: Merchant apikey header value issued in the Tingg dashboard.
      merchantTransactionId:
        type: string
        description: Unique merchant transaction id for this checkout.
      serviceCode:
        type: string
        description: Tingg service code identifying the merchant product line.
      countryCode:
        type: string
        description: ISO 3166-1 alpha-2 country code.
      currencyCode:
        type: string
        description: ISO 4217 currency code.
      requestAmount:
        type: number
        description: Amount to charge the customer.
      callbackUrl:
        type: string
        description: IPN callback URL Tingg posts the payment result to.
      acknowledgementType:
        type: string
        description: Acknowledgement type — Full or Partial.
      acknowledgementAmount:
        type: number
        description: Required when acknowledgementType is Partial.
      acknowledgementNarration:
        type: string
        description: Free-text narration for the acknowledgement.
      acknowledgmentReference:
        type: string
        description: Merchant reference for the acknowledgement.
      statusCode:
        type: integer
        description: Settlement status code — 183 successful, 180 rejected, 188 received.
  steps:
  - stepId: authenticate
    description: >-
      Exchange the client credentials for a bearer access token used to
      authorize the subsequent calls.
    operationId: requestAccessToken
    requestBody:
      contentType: application/json
      payload:
        grant_type: client_credentials
        client_id: $inputs.clientId
        client_secret: $inputs.clientSecret
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      accessToken: $response.body#/access_token
  - stepId: createCheckout
    description: >-
      Create a hosted Express Checkout session for the customer to pay.
    operationId: createExpressCheckout
    parameters:
    - name: apikey
      in: header
      value: $inputs.apiKey
    - name: Authorization
      in: header
      value: "Bearer $steps.authenticate.outputs.accessToken"
    requestBody:
      contentType: application/json
      payload:
        merchant_transaction_id: $inputs.merchantTransactionId
        service_code: $inputs.serviceCode
        country_code: $inputs.countryCode
        currency_code: $inputs.currencyCode
        request_amount: $inputs.requestAmount
        callback_url: $inputs.callbackUrl
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      checkoutRequestId: $response.body#/checkout_request_id
      shortUrl: $response.body#/short_url
  - stepId: pollStatus
    description: >-
      Query the request status by merchant_transaction_id, repeating while the
      request is in flight, until a payment is reported.
    operationId: queryRequestStatus
    parameters:
    - name: apikey
      in: header
      value: $inputs.apiKey
    - name: Authorization
      in: header
      value: "Bearer $steps.authenticate.outputs.accessToken"
    - name: merchant_transaction_id
      in: query
      value: $inputs.merchantTransactionId
    - name: service_code
      in: query
      value: $inputs.serviceCode
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      requestStatusCode: $response.body#/request_status_code
      payments: $response.body#/payments
    onSuccess:
    - name: paymentSettled
      type: goto
      stepId: acknowledge
      criteria:
      - context: $response.body
        condition: $.payments.length > 0
        type: jsonpath
    - name: stillPending
      type: goto
      stepId: pollStatus
      criteria:
      - context: $response.body
        condition: $.payments.length == 0
        type: jsonpath
  - stepId: acknowledge
    description: >-
      Send the delivered status back to the platform so settlement can proceed.
      Use status_code 183 for a successful delivery.
    operationId: acknowledgePayment
    parameters:
    - name: apikey
      in: header
      value: $inputs.apiKey
    - name: Authorization
      in: header
      value: "Bearer $steps.authenticate.outputs.accessToken"
    requestBody:
      contentType: application/json
      payload:
        acknowledgement_type: $inputs.acknowledgementType
        acknowledgement_amount: $inputs.acknowledgementAmount
        acknowledgement_narration: $inputs.acknowledgementNarration
        acknowledgment_reference: $inputs.acknowledgmentReference
        merchant_transaction_id: $inputs.merchantTransactionId
        service_code: $inputs.serviceCode
        status_code: $inputs.statusCode
        currency_code: $inputs.currencyCode
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      acknowledgementStatusCode: $response.body#/status_code
      acknowledgementStatusDescription: $response.body#/status_description
  outputs:
    checkoutRequestId: $steps.createCheckout.outputs.checkoutRequestId
    payments: $steps.pollStatus.outputs.payments
    acknowledgementStatusCode: $steps.acknowledge.outputs.acknowledgementStatusCode