{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://raw.githubusercontent.com/api-evangelist/kraken/refs/heads/main/json-schema/kraken-book-envelope-schema.json",
  "title": "BookEnvelope",
  "description": "BookEnvelope schema from Kraken Spot WebSocket API v2",
  "type": "object",
  "properties": {
    "channel": {
      "type": "string",
      "enum": [
        "book"
      ],
      "example": "book"
    },
    "type": {
      "type": "string",
      "enum": [
        "snapshot",
        "update"
      ],
      "example": "snapshot"
    },
    "data": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "symbol": {
            "type": "string",
            "example": "PI_XBTUSD"
          },
          "bids": {
            "type": "array",
            "items": {
              "$ref": "#/components/schemas/PriceLevel"
            },
            "example": []
          },
          "asks": {
            "type": "array",
            "items": {
              "$ref": "#/components/schemas/PriceLevel"
            },
            "example": []
          },
          "checksum": {
            "type": "integer",
            "format": "int64",
            "description": "CRC32 checksum of the top 10 bids and asks.",
            "example": 1
          },
          "timestamp": {
            "type": "string",
            "format": "date-time",
            "example": "2026-05-30T00:00:00Z"
          }
        }
      },
      "example": []
    }
  },
  "required": [
    "channel",
    "type",
    "data"
  ]
}