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Understand the data you receive from the Orderbook WebSocket, including response formats, deduplication behavior, and the difference between Standard and HFT modes.

BBO Response Format

BBO payload

{
  "channel": "bbo",
  "data": {
    "coin": "BTC",
    "time": 1702530000000,
    "bid": {"px": "100000.0", "sz": "0.5", "n": 1},
    "ask": {"px": "100001.0", "sz": "0.3", "n": 1}
  }
}

{
  "channel": "bbo",
  "data": {
    "coin": "BTC",
    "time": 1702530000000,
    "bid": {"px": "100000.0", "sz": "0.5", "n": 1},
    "ask": {"px": "100001.0", "sz": "0.3", "n": 1}
  }
}

{
  "channel": "bbo",
  "data": {
    "coin": "BTC",
    "time": 1702530000000,
    "bid": {"px": "100000.0", "sz": "0.5", "n": 1},
    "ask": {"px": "100001.0", "sz": "0.3", "n": 1}
  }
}

Order Updates Response Format

orderUpdates payload

{
  "channel": "orderUpdates",
  "data": [{
    "user": "0x...",
    "time": 1702530000000,
    "height": 12345,
    "orderStatus": {
      "status": "open",
      "order": {
        "coin": "BTC",
        "side": "B",
        "limitPx": "100000.0",
        "sz": "0.5"
      }
    }
  }]
}

{
  "channel": "orderUpdates",
  "data": [{
    "user": "0x...",
    "time": 1702530000000,
    "height": 12345,
    "orderStatus": {
      "status": "open",
      "order": {
        "coin": "BTC",
        "side": "B",
        "limitPx": "100000.0",
        "sz": "0.5"
      }
    }
  }]
}

{
  "channel": "orderUpdates",
  "data": [{
    "user": "0x...",
    "time": 1702530000000,
    "height": 12345,
    "orderStatus": {
      "status": "open",
      "order": {
        "coin": "BTC",
        "side": "B",
        "limitPx": "100000.0",
        "sz": "0.5"
      }
    }
  }]
}

Deduplication

The server automatically deduplicates data to minimize bandwidth and processing overhead.

Type	Behavior
BBO	Only sends when bid/ask price or size changes (~1μs overhead)
L2Book	Only sends when snapshot hash changes (~10μs overhead)
Trades	Only sends on fills — no empty messages

Standard vs HFT Mode

HypeRPC offers two modes. Standard mode batches updates by block, while HFT mode streams events individually for the lowest possible latency.

Feature	Standard	HFT Mode
Update frequency	~2/sec (block rate)	~100+/sec (streaming)
BBO latency	~500ms	~100ms
Processing	Block-synchronized	Event-by-event
L4Book	Full support	Streaming diffs
Compression	zlib (optional, ~80% savings)	Disabled for speed

Tip

HFT mode is recommended for market makers and algorithmic trading systems where every millisecond counts. Standard mode is ideal for dashboards, analytics, and general monitoring.

Supported Markets

Market	Description	Examples
Perpetuals	Perpetual futures contracts	BTC, ETH, SOL, HYPE
Spot	Spot trading pairs	PURR/USDC, @-prefixed coins
HIP-3	HIP-3 DEX markets	X:Y format (e.g., xyz:TSLA)

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Last upade: May 12, 2026

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