Tink Initiate A Payment And Poll Its Status

arazzo: 1.0.1
info:
  title: Tink Initiate A Payment And Poll Its Status
  summary: Initiate a Pay by Bank payment, then poll the payment until it reaches a terminal status.
  description: >-
    The core Tink Payments (PIS) flow. It initiates an account-to-account
    payment to one or more beneficiaries and returns the Tink Link redirect URL
    the customer follows to authenticate and authorize at their bank, then
    polls the payment by id until it settles into a terminal status (EXECUTED,
    REJECTED, CANCELLED, or FAILED). Every step spells out its request inline so
    the flow can be read and executed without opening the underlying OpenAPI
    description.
  version: 1.0.0
sourceDescriptions:
- name: paymentsApi
  url: ../openapi/tink-payments-api-openapi.yml
  type: openapi
workflows:
- workflowId: initiate-payment-and-poll
  summary: Initiate a payment and poll until it reaches a terminal status.
  description: >-
    Initiates a payment, surfaces the Tink Link redirect URL, then re-checks
    the payment until it is EXECUTED, REJECTED, CANCELLED, or FAILED.
  inputs:
    type: object
    required:
    - accessToken
    - amount
    - currency
    - market
    - destinationName
    - destinationAccountType
    - destinationAccountValue
    properties:
      accessToken:
        type: string
        description: An access token authorized for payment initiation.
      amount:
        type: string
        description: The payment amount as a decimal string (e.g. 100.00).
      currency:
        type: string
        description: ISO 4217 currency code (e.g. EUR).
      market:
        type: string
        description: ISO 3166-1 alpha-2 market code (e.g. GB).
      destinationName:
        type: string
        description: The beneficiary account holder name.
      destinationAccountType:
        type: string
        description: The destination account identifier type (IBAN, SORT_CODE, BBAN, or ACCOUNT_NUMBER).
      destinationAccountValue:
        type: string
        description: The destination account identifier value.
      remittanceValue:
        type: string
        description: Optional unstructured remittance information shown on the payment.
  steps:
  - stepId: initiatePayment
    description: >-
      Initiate the payment to the supplied beneficiary and capture the payment
      id and the Tink Link redirect URL the customer must follow.
    operationId: initiatePayment
    parameters:
    - name: Authorization
      in: header
      value: "Bearer $inputs.accessToken"
    requestBody:
      contentType: application/json
      payload:
        amount: $inputs.amount
        currency: $inputs.currency
        market: $inputs.market
        remittanceInformation:
          type: UNSTRUCTURED
          value: $inputs.remittanceValue
        destinations:
        - name: $inputs.destinationName
          accountNumber:
            type: $inputs.destinationAccountType
            value: $inputs.destinationAccountValue
    successCriteria:
    - condition: $statusCode == 201
    outputs:
      paymentId: $response.body#/id
      status: $response.body#/status
      redirectUrl: $response.body#/redirectUrl
  - stepId: pollPayment
    description: >-
      Retrieve the payment status. If the payment is still in a non-terminal
      state, loop back and check again; otherwise finish.
    operationId: getPayment
    parameters:
    - name: Authorization
      in: header
      value: "Bearer $inputs.accessToken"
    - name: paymentId
      in: path
      value: $steps.initiatePayment.outputs.paymentId
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      status: $response.body#/status
    onSuccess:
    - name: stillPending
      type: goto
      stepId: pollPayment
      criteria:
      - context: $response.body
        condition: $.status == "CREATED" || $.status == "AUTHORIZED"
        type: jsonpath
    - name: settled
      type: end
      criteria:
      - context: $response.body
        condition: $.status == "EXECUTED" || $.status == "REJECTED" || $.status == "CANCELLED" || $.status == "FAILED"
        type: jsonpath
  outputs:
    paymentId: $steps.initiatePayment.outputs.paymentId
    redirectUrl: $steps.initiatePayment.outputs.redirectUrl
    finalStatus: $steps.pollPayment.outputs.status