Mux Rotate URL Signing Key

arazzo: 1.0.1
info:
  title: Mux Rotate URL Signing Key
  summary: Create a new URL signing key, read it back, list all keys, then delete the previous key to complete a rotation.
  description: >-
    Rotates the URL signing keys used to mint signed playback tokens for Mux
    Video. The workflow creates a fresh signing key, reads it back to capture its
    public key, lists the signing keys in the environment, and then deletes the
    caller supplied previous key id so only the new key remains in service. 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: muxApi
  url: ../openapi/mux-openapi.yml
  type: openapi
workflows:
- workflowId: url-signing-key-rotation
  summary: Create a new URL signing key and retire the previous one.
  description: >-
    Creates a new URL signing key, reads it back, lists keys, and deletes the
    previous key to finish the rotation.
  inputs:
    type: object
    required:
    - previousKeyId
    properties:
      previousKeyId:
        type: string
        description: The id of the existing URL signing key to retire once the new key is created.
  steps:
  - stepId: createKey
    description: >-
      Create a new URL signing key, returning its id, private key, and public
      key.
    operationId: create-url-signing-key
    successCriteria:
    - condition: $statusCode == 201
    outputs:
      keyId: $response.body#/data/id
      privateKey: $response.body#/data/private_key
  - stepId: getKey
    description: >-
      Read the newly created signing key back to capture its public key for
      distribution to verifiers.
    operationId: get-url-signing-key
    parameters:
    - name: SIGNING_KEY_ID
      in: path
      value: $steps.createKey.outputs.keyId
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      keyId: $response.body#/data/id
      createdAt: $response.body#/data/created_at
  - stepId: listKeys
    description: >-
      List the URL signing keys in the environment to confirm both the new and
      previous keys are present before retiring the old one.
    operationId: list-url-signing-keys
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      keys: $response.body#/data
  - stepId: deletePreviousKey
    description: >-
      Delete the previous signing key so signed playback tokens must be minted
      with the new key going forward.
    operationId: delete-url-signing-key
    parameters:
    - name: SIGNING_KEY_ID
      in: path
      value: $inputs.previousKeyId
    successCriteria:
    - condition: $statusCode == 204
    outputs:
      statusCode: $statusCode
  outputs:
    newKeyId: $steps.createKey.outputs.keyId
    keys: $steps.listKeys.outputs.keys