Bitfinex include sequence IDs

[evan-coygo]

Bitfinex updates don't include a sequence ID so we can't be sure our book is valid. Bitfinex docs mention a config flag you can set to enable sequences and timestamps on each event

• see docs for "conf" flags. https://docs.bitfinex.com/docs/ws-general#configuration
  • 65536 adds a sequence ID
  • 32768 adds a timestamp
• event payload docs https://docs.bitfinex.com/reference#ws-public-books
• they provide an example using sequence here https://gist.github.com/prdn/b8c067c758aab7fa3bf715101086b47c
• this might require the /v2 websocket endpoint
• example config message this._wss.send(JSON.stringify({ event: 'conf', flags: 65536 + 32768 }))