Changelog

Release history

v0.1.0

December 2024

Initial release of Havklo SDK.

Features

Core SDK

• KrakenClient with builder pattern
• L2 orderbook (10, 25, 100, 500, 1000 depth)
• CRC32 checksum validation
• Automatic reconnection with exponential backoff
• Circuit breaker pattern
• Event-driven architecture

L3 Orderbook

• Order-level tracking
• Queue position calculation
• VWAP computation
• Fill probability estimation

WebSocket Trading

• Place, amend, cancel orders
• Batch operations
• Order lifecycle tracking

WASM Support

• kraken-wasm for browser integration
• apply_and_get() API
• Same validation as native

Futures

• kraken-futures-ws for perpetuals
• Funding rates, mark prices

Performance

Operation	Latency
Best bid/ask	1 ns
Spread	3.5 ns
Apply delta	~100 ns
L3 queue position	~30 ns

Crate Versions

Crate	Version
kraken-sdk	0.1.0
kraken-ws	0.1.0
kraken-book	0.1.0
kraken-types	0.1.0
kraken-auth	0.1.0
kraken-futures-ws	0.1.0
kraken-wasm	0.1.0

Live Demos

• Havsyn - Orderbook Visualizer
• Havdepth - Depth Chart
• Havflow - Order Flow
• Havnet - Multi-Symbol Dashboard