{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://raw.githubusercontent.com/api-evangelist/blockchain/refs/heads/main/json-schema/com-exchange-l2event-payload-schema.json",
  "title": "ExchangeL2EventPayload",
  "description": "ExchangeL2EventPayload schema from Blockchain.com WebSocket APIs",
  "type": "object",
  "properties": {
    "seqnum": {
      "type": "integer"
    },
    "event": {
      "type": "string",
      "enum": [
        "snapshot",
        "updated"
      ]
    },
    "channel": {
      "type": "string",
      "const": "l2"
    },
    "symbol": {
      "type": "string"
    },
    "bids": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "px",
          "qty",
          "num"
        ],
        "properties": {
          "px": {
            "type": "number"
          },
          "qty": {
            "type": "number",
            "description": "Aggregated size at this price. 0 means remove level."
          },
          "num": {
            "type": "integer",
            "description": "Number of orders at this price level."
          }
        }
      }
    },
    "asks": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "px",
          "qty",
          "num"
        ],
        "properties": {
          "px": {
            "type": "number"
          },
          "qty": {
            "type": "number"
          },
          "num": {
            "type": "integer"
          }
        }
      }
    }
  },
  "required": [
    "seqnum",
    "event",
    "channel",
    "symbol",
    "bids",
    "asks"
  ]
}