v1.8.0 - 2025-08-30

Added

WebSocket orderbook subscription filtering by maker address
- New capability: Filter orderbook events (post_order, cancel_order, trade) by specific market maker address
- Benefits: Reduces bandwidth usage by receiving only relevant orderbook updates, enables tracking specific market makers
- Channels affected: orderbook_options, orderbook_perps
Example:
```
// Subscribe to orderbook events from a specific maker only
const subscription = {
  channel: 'orderbook_options',
  query: {
    pair: 'BTC_USDC',
    maker: '0x1234567890abcdef1234567890abcdef12345678'
  }
};
```
WebSocket orderbook snapshot skipping option
- New capability: Skip initial orderbook snapshot when subscribing to orderbook channels
- Benefits: Faster subscription initialization, reduced initial data transfer for clients that only need incremental updates
- Use case: Ideal for applications that maintain their own orderbook state or only need real-time updates
Example:
```
// Subscribe without receiving initial orderbook state
const subscription = {
  channel: 'orderbook_perps',
  query: {
    instrument_name: 'BTC_USDC-PERPETUAL',
    options: {
      skip_snapshot: true  // Only receive incremental updates
    }
  }
};
```

Changed

WebSocket orderbook subscriptions now support optional pair parameter

Breaking Change: The pair parameter is now optional for orderbook_options and orderbook_perps channels
Benefits: Subscribe to all instruments across all markets in a single subscription, simplified market-wide monitoring

Before:

// Previously required to specify a pair
const subscription = {
  channel: 'orderbook_options',
  query: {
    pair: 'BTC_USDC',  // Was required
    maturity: '29AUG25'
  }
};

After:

// Now can subscribe to all markets at once
const subscription = {
  channel: 'orderbook_options',
  query: {
    // pair is now optional - omit to receive all markets
    maturity: '29AUG25'  // Can filter by maturity across all pairs
  }
};

// Or subscribe to absolutely everything
const subscribeToAll = {
  channel: 'orderbook_perps',
  query: {}  // Receives all perpetual orderbook events
};

Migration Guide:

Existing subscriptions with pair specified will continue to work unchanged
To subscribe to all markets, simply omit the pair parameter
Consider using the new maker filter or skip_snapshot option to manage data volume when subscribing broadly