{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "https://synacl.com/protocol/v1/schemas/macro-step.json",
  "title": "Macro backend-step request",
  "description": "Published on `<prefix>/macro/step` when a running macro reaches a CALL instruction: the gateway asks the backend to run backend step `stepId` of the macro — a saved action (webhook or MQTT publish) that only the cloud can perform, charged against the account's action quota. The gateway does not wait for an answer.",
  "type": "object",
  "required": [
    "runId",
    "macroId",
    "stepId"
  ],
  "properties": {
    "runId": {
      "type": "string"
    },
    "macroId": {
      "type": "string"
    },
    "stepId": {
      "description": "The `stepId` operand of the CALL instruction.",
      "type": "integer",
      "minimum": 0
    },
    "ts": {
      "description": "Epoch milliseconds.",
      "type": "integer",
      "minimum": 0
    }
  },
  "additionalProperties": false
}