Book Message

Emitted When:

• First subscribed to a market
• When there is a trade that affects the book

Structure

Name	Type	Description
event_type	string	"book"
asset_id	string	asset ID (token ID)
market	string	condition ID of market
timestamp	string	unix timestamp the current book generation in milliseconds (1/1,000 second)
hash	string	hash summary of the orderbook content
buys	OrderSummary[]	list of type (size, price) aggregate book levels for buys
sells	OrderSummary[]	list of type (size, price) aggregate book levels for sells

Where a OrderSummary object is of the form:

Name	Type	Description
price	string	size available at that price level
size	string	price of the orderbook level

{
  "event_type": "book",
  "asset_id": "65818619657568813474341868652308942079804919287380422192892211131408793125422",
  "market": "0xbd31dc8a20211944f6b70f31557f1001557b59905b7738480ca09bd4532f84af",
  "bids": [
    { "price": ".48", "size": "30" },
    { "price": ".49", "size": "20" },
    { "price": ".50", "size": "15" }
  ],
  "asks": [
    { "price": ".52", "size": "25" },
    { "price": ".53", "size": "60" },
    { "price": ".54", "size": "10" }
  ],
  "timestamp": "123456789000",
  "hash": "0x0...."
}