Tango Place Order with Balance Check

arazzo: 1.0.1
info:
  title: Tango Place Order with Balance Check
  summary: Check an account balance, then branch to place a reward order only when funds are sufficient.
  description: >-
    A guarded reward-sending pattern. The workflow reads the funding account to
    learn its current balance, then branches: when the balance covers the reward
    amount it places the order and confirms it, and when the balance is too low
    it stops without placing an order. Every step spells out its request inline
    so the flow can be read and executed without opening the underlying OpenAPI
    description. Authentication uses the platform's HTTP Basic credentials
    declared by the basicAuth security scheme; those credentials are applied at
    the transport layer and are not request parameters.
  version: 1.0.0
sourceDescriptions:
- name: tangoRaasApi
  url: ../openapi/tango-raas-api-openapi.yml
  type: openapi
workflows:
- workflowId: place-order-with-balance-check
  summary: Verify the account balance covers the reward, then place and confirm the order.
  description: >-
    Reads the account balance and only places the reward order when there are
    sufficient funds, confirming the order afterward.
  inputs:
    type: object
    required:
    - customerIdentifier
    - accountIdentifier
    - amount
    - utid
    - recipientName
    - recipientEmail
    - senderName
    - senderEmail
    properties:
      customerIdentifier:
        type: string
        description: Customer that owns the funding account.
      accountIdentifier:
        type: string
        description: Account whose balance funds the reward.
      amount:
        type: number
        description: Value of the reward in the account currency.
      utid:
        type: string
        description: Universal Token ID of the reward product to send.
      recipientName:
        type: string
        description: Name of the reward recipient.
      recipientEmail:
        type: string
        description: Email address of the reward recipient.
      senderName:
        type: string
        description: Name of the reward sender.
      senderEmail:
        type: string
        description: Email address of the reward sender.
  steps:
  - stepId: checkBalance
    description: >-
      Read the funding account to capture its current balance before deciding
      whether to place the order.
    operationId: getAccount
    parameters:
    - name: customerIdentifier
      in: path
      value: $inputs.customerIdentifier
    - name: accountIdentifier
      in: path
      value: $inputs.accountIdentifier
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      currentBalance: $response.body#/currentBalance
    onSuccess:
    - name: fundsAvailable
      type: goto
      stepId: placeOrder
      criteria:
      - context: $response.body
        condition: $.currentBalance >= $inputs.amount
        type: jsonpath
    - name: insufficientFunds
      type: end
      criteria:
      - context: $response.body
        condition: $.currentBalance < $inputs.amount
        type: jsonpath
  - stepId: placeOrder
    description: >-
      Place the reward order now that the account balance has been confirmed to
      cover the reward amount.
    operationId: createOrder
    requestBody:
      contentType: application/json
      payload:
        customerIdentifier: $inputs.customerIdentifier
        accountIdentifier: $inputs.accountIdentifier
        amount: $inputs.amount
        utid: $inputs.utid
        recipient:
          name: $inputs.recipientName
          email: $inputs.recipientEmail
        sender:
          name: $inputs.senderName
          email: $inputs.senderEmail
        sendEmail: true
    successCriteria:
    - condition: $statusCode == 201
    outputs:
      referenceOrderID: $response.body#/referenceOrderID
      orderStatus: $response.body#/status
  - stepId: confirmOrder
    description: >-
      Read the order back by reference id to confirm its status.
    operationId: getOrder
    parameters:
    - name: referenceOrderID
      in: path
      value: $steps.placeOrder.outputs.referenceOrderID
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      referenceOrderID: $response.body#/referenceOrderID
      orderStatus: $response.body#/status
  outputs:
    currentBalance: $steps.checkBalance.outputs.currentBalance
    referenceOrderID: $steps.confirmOrder.outputs.referenceOrderID
    orderStatus: $steps.confirmOrder.outputs.orderStatus