DLOB Server for Drift Protocol v2

DLOB Server

This is the backend server that provides a REST API for the drift DLOB.

Run the server

Setup

First set the necessary environment variables:

cp .env.example .env

Environment Configuration

To properly configure the DLOB server, set the following environment variables in your .env file:

Variable	Description	Example Value
ENDPOINT	The Solana RPC node http endpoint.	https://your-private-rpc-node.com
WS_ENDPOINT	The Solana RPC node websocket endpoint.	wss://your-private-rpc-node.com
USE_WEBSOCKET	Flag to enable WebSocket connection.	true
USE_ORDER_SUBSCRIBER	Flag to enable order subscriber DLOB source.	true
DISABLE_GPA_REFRESH	Flag to disable periodic refresh using getProgramAccounts.	true
ENV	The network environment the server is connecting to.	mainnet-beta
PORT	The port number the HTTP server listens on.	6969
METRICS_PORT	The port number for Prometheus metrics.	9465
PRIVATE_KEY	Path to the Solana private key file.	/path/to/keypair.json
RATE_LIMIT_CALLS_PER_SECOND	Maximum number of API calls per second.	100
PERP_MARKETS_TO_LOAD	Number of perpetual markets to load at startup.	0
SPOT_MARKETS_TO_LOAD	Number of spot markets to load at startup.	5
ELASTICACHE_HOST	(for websocket server) Redis host endpoint.	localhost
ELASTICACHE_PORT	(for websocket server) Redis port.	6379
REDIS_CLIENT	(for websocket server) Redis client type (DLOB/DLOB_HELIUS).	DLOB
WS_PORT	(for websocket server) The port to run the websocket server on.	3000

Note: multiple Redis hosts can be provided by providing a comma separated string.

HTTP mode

The HTTP server as documented here can be run with, and by default accessible on http://127.0.0.1:6969:

yarn run dev

Websocket mode

The websocket server has 2 components, the dlob-publisher that takes frequent snapshots of the DLOB and publishes them to Redis, and ws-manager listens for new connections and sends the latest DLOB to ws clients, the two components communicate through Redis pub-sub.

To run the websocket server, a Redis cache is required, and the following environment variables must be set:

• REDIS_HOSTS
• REDIS_PASSWORDS
• REDIS_PORTS

In one terminal, run:

yarn run dlob-publisher

In a second terminal, run:

yarn run ws-manager

Then connect to the ws server at ws://127.0.0.1:3000

Run the example client

Documentation for connecting to the dlob server are available here

TODO: complete client examples.