> ## Documentation Index
> Fetch the complete documentation index at: https://miny.mintlify.app/llms.txt
> Use this file to discover all available pages before exploring further.

# 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](https://havsyn.vercel.app) - Orderbook Visualizer
* [Havdepth](https://havdepth.vercel.app) - Depth Chart
* [Havflow](https://havflow.vercel.app) - Order Flow
* [Havnet](https://havnet.vercel.app) - Multi-Symbol Dashboard