Changelog - Havklo

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