Kraken Preflight and Place Spot Order

arazzo: 1.0.1
info:
  title: Kraken Preflight and Place Spot Order
  summary: Check system status and live ticker, place a spot order, then confirm it.
  description: >-
    A defensive order-entry flow for the Kraken Spot REST API. Before committing
    capital the workflow confirms the exchange is online, reads the live ticker
    for the target pair so the caller can price against the current bid/ask, then
    submits the order and immediately queries it back by transaction id to
    confirm acceptance. 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: krakenSpotApi
  url: ../openapi/kraken-spot-rest-openapi.yml
  type: openapi
workflows:
- workflowId: preflight-place-spot-order
  summary: Verify the exchange is online and priced, place a spot order, and confirm it.
  description: >-
    Reads system status and the current ticker for the pair, submits a single
    order via AddOrder, and queries the resulting transaction id to confirm the
    order was accepted.
  inputs:
    type: object
    required:
    - nonce
    - pair
    - ordertype
    - type
    - volume
    properties:
      nonce:
        type: string
        description: Ever-increasing nonce (typically a millisecond timestamp) for the signed request.
      otp:
        type: string
        description: One-time password if two-factor is enabled on the API key.
      pair:
        type: string
        description: The asset pair to trade (e.g. XBTUSD).
      ordertype:
        type: string
        description: Order type (market, limit, stop-loss, take-profit, etc.).
      type:
        type: string
        description: Order direction, buy or sell.
      volume:
        type: string
        description: Order volume in base-asset terms.
      price:
        type: string
        description: Limit price; required for limit and stop order types.
  steps:
  - stepId: checkStatus
    description: >-
      Confirm the exchange is operational before trading. A status other than
      online (maintenance, cancel_only, post_only) is a signal to abort.
    operationId: getSystemStatus
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      status: $response.body#/result/status
  - stepId: readTicker
    description: >-
      Read the live ticker for the pair so the caller can price the order against
      the current best bid and ask.
    operationId: getTickerInformation
    parameters:
    - name: pair
      in: query
      value: $inputs.pair
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      ticker: $response.body#/result
  - stepId: placeOrder
    description: >-
      Submit the order. Private Spot endpoints are signed and accept
      application/x-www-form-urlencoded bodies; the nonce must increase on every
      call.
    operationId: addOrder
    requestBody:
      contentType: application/x-www-form-urlencoded
      payload:
        nonce: $inputs.nonce
        otp: $inputs.otp
        pair: $inputs.pair
        ordertype: $inputs.ordertype
        type: $inputs.type
        volume: $inputs.volume
        price: $inputs.price
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      txid: $response.body#/result/txid
      descr: $response.body#/result/descr
  - stepId: confirmOrder
    description: >-
      Query the freshly created order by its transaction id to confirm it was
      accepted and read back its current status.
    operationId: queryOrdersInfo
    requestBody:
      contentType: application/x-www-form-urlencoded
      payload:
        nonce: $inputs.nonce
        otp: $inputs.otp
        txid: $steps.placeOrder.outputs.txid
        trades: true
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      orders: $response.body#/result
  outputs:
    systemStatus: $steps.checkStatus.outputs.status
    txid: $steps.placeOrder.outputs.txid
    orders: $steps.confirmOrder.outputs.orders