Deepgram Balance-Gated Transcription

arazzo: 1.0.1
info:
  title: Deepgram Balance-Gated Transcription
  summary: Check a project's billing balance and only transcribe audio when sufficient credit remains.
  description: >-
    A cost-guarded transcription flow. The workflow lists the project's billing
    balances, reads the detail of the primary balance, and branches: when the
    balance amount is above zero it submits the audio for transcription, and
    when the balance is depleted it ends the workflow without spending. 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: balancesApi
  url: ../openapi/deepgram-balances-api-openapi.yml
  type: openapi
- name: preRecordedApi
  url: ../openapi/deepgram-pre-recorded-api-openapi.yml
  type: openapi
workflows:
- workflowId: balance-gated-transcription
  summary: Gate a transcription on the project having a positive billing balance.
  description: >-
    Lists balances, reads the chosen balance detail, and only transcribes the
    supplied audio when the balance amount is greater than zero.
  inputs:
    type: object
    required:
    - apiKey
    - projectId
    - balanceId
    - audioUrl
    properties:
      apiKey:
        type: string
        description: Deepgram API key used to authenticate requests.
      projectId:
        type: string
        description: The project whose balance gates the transcription.
      balanceId:
        type: string
        description: The billing balance to inspect before transcribing.
      audioUrl:
        type: string
        description: Publicly accessible URL of the audio file to transcribe.
      model:
        type: string
        description: Speech-to-text model to use for transcription.
        default: nova-3
  steps:
  - stepId: listBalances
    description: >-
      List the project's billing balances to confirm a balance exists before
      inspecting its detail.
    operationId: listProjectBalances
    parameters:
    - name: Authorization
      in: header
      value: Token $inputs.apiKey
    - name: project_id
      in: path
      value: $inputs.projectId
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      balances: $response.body#/balances
  - stepId: getBalance
    description: >-
      Read the chosen balance detail and branch on whether credit remains: a
      positive amount proceeds to transcription, a depleted balance ends the
      workflow.
    operationId: getProjectBalance
    parameters:
    - name: Authorization
      in: header
      value: Token $inputs.apiKey
    - name: project_id
      in: path
      value: $inputs.projectId
    - name: balance_id
      in: path
      value: $inputs.balanceId
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      amount: $response.body#/amount
      units: $response.body#/units
    onSuccess:
    - name: hasCredit
      type: goto
      stepId: transcribeAudio
      criteria:
      - context: $response.body
        condition: $.amount > 0
        type: jsonpath
    - name: noCredit
      type: end
      criteria:
      - context: $response.body
        condition: $.amount <= 0
        type: jsonpath
  - stepId: transcribeAudio
    description: >-
      Submit the hosted audio file for transcription now that the project has a
      positive billing balance.
    operationId: transcribePreRecordedAudio
    parameters:
    - name: Authorization
      in: header
      value: Token $inputs.apiKey
    - name: model
      in: query
      value: $inputs.model
    - name: punctuate
      in: query
      value: true
    - name: smart_format
      in: query
      value: true
    requestBody:
      contentType: application/json
      payload:
        url: $inputs.audioUrl
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      transcript: $response.body#/results/channels/0/alternatives/0/transcript
      requestId: $response.body#/metadata/request_id
  outputs:
    balanceAmount: $steps.getBalance.outputs.amount
    transcript: $steps.transcribeAudio.outputs.transcript