ThingSpeak Write Update and Read Last Entry

arazzo: 1.0.1
info:
  title: ThingSpeak Write Update and Read Last Entry
  summary: Post a new feed entry via the form-encoded update endpoint, then read the last entry back.
  description: >-
    A read-after-write confirmation loop for a single device update. The flow
    posts a multi-field reading to the channel using the form-encoded update
    endpoint so the write API key never appears in a URL, then reads the most
    recent entry on the channel to confirm the values were ingested. 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: channelsApi
  url: ../openapi/thingspeak-channels-api-openapi.yml
  type: openapi
- name: updateApi
  url: ../openapi/thingspeak-update-api-openapi.yml
  type: openapi
workflows:
- workflowId: write-update-and-read-last-entry
  summary: Post a reading with the update endpoint and verify it as the last entry.
  description: >-
    Posts a form-encoded update with up to three field values, then reads the
    channel's last entry to confirm the write.
  inputs:
    type: object
    required:
    - channelId
    - writeApiKey
    - readApiKey
    - field1Value
    properties:
      channelId:
        type: integer
        description: Numeric id of the channel being written to and read from.
      writeApiKey:
        type: string
        description: Channel Write API Key used to authorize the update.
      readApiKey:
        type: string
        description: Channel Read API Key used to read the last entry back.
      field1Value:
        type: string
        description: Value to write into field1.
      field2Value:
        type: string
        description: Optional value to write into field2.
      status:
        type: string
        description: Optional status message to attach to the entry.
  steps:
  - stepId: postUpdate
    description: >-
      Write a single entry to the channel via the form-encoded update endpoint.
    operationId: updateChannelFeedPost
    requestBody:
      contentType: application/x-www-form-urlencoded
      payload:
        api_key: $inputs.writeApiKey
        field1: $inputs.field1Value
        field2: $inputs.field2Value
        status: $inputs.status
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      entryId: $response.body#/entry_id
      createdAt: $response.body#/created_at
  - stepId: readLastEntry
    description: >-
      Read the most recent entry on the channel to confirm the posted values.
    operationId: readLastEntry
    parameters:
    - name: channel_id
      in: path
      value: $inputs.channelId
    - name: api_key
      in: query
      value: $inputs.readApiKey
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      entryId: $response.body#/entry_id
      field1: $response.body#/field1
      field2: $response.body#/field2
  outputs:
    writtenEntryId: $steps.postUpdate.outputs.entryId
    confirmedEntryId: $steps.readLastEntry.outputs.entryId