Grubhub Order Cancellation Payload

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://developer.grubhub.com/schemas/grubhub/ordercancellationpayload.json",
  "title": "Grubhub Order Cancellation Payload",
  "description": "Webhook payload for an order cancellation event.",
  "type": "object",
  "properties": {
    "event_type": {
      "type": "string",
      "description": "The type of event that triggered this webhook.",
      "const": "ORDER_CANCELLED",
      "example": "STANDARD"
    },
    "order_uuid": {
      "type": "string",
      "format": "uuid",
      "description": "The unique identifier for the cancelled order.",
      "example": "3fa85f64-5717-4562-b3fc-2c963f66afa6"
    },
    "merchant_id": {
      "type": "string",
      "description": "The Grubhub merchant identifier.",
      "example": "ghm-1234567890"
    },
    "cancelled_by": {
      "type": "string",
      "description": "Who initiated the cancellation.",
      "enum": [
        "DINER",
        "MERCHANT",
        "SYSTEM"
      ],
      "example": "DINER"
    },
    "reason": {
      "type": "string",
      "description": "The reason for cancellation.",
      "example": "Out of an item."
    },
    "cancelled_at": {
      "type": "string",
      "format": "date-time",
      "description": "When the order was cancelled.",
      "example": "2026-06-02T18:30:00Z"
    }
  }
}