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

# Changelog

> Version history for ChainStream API and SDKs

## 2026

### 2026-02-04

<Note>
  **SDK v0.2.6 / v0.1.3** - Multi-language SDK Sync Update
</Note>

**SDK Updates**

* TypeScript SDK v0.2.6
  * WebSocket connection stability improvements
  * Fixed subscription reconnection issues
* Python SDK v0.1.3
  * Async client performance optimization
  * Enhanced type hints
* Go SDK v0.1.3
  * Error handling improvements
  * Memory usage optimization
* Rust SDK v0.1.3
  * First stable release
  * Complete API coverage

***

### 2026-02-03

<Note>
  **SDK v0.2.0** - Multi-language SDK Official Release
</Note>

**Major Updates**

* 🎉 Python SDK v0.1.0 officially released
* 🎉 Go SDK v0.1.0 officially released
* 🎉 Rust SDK v0.1.0 officially released
* TypeScript SDK upgraded to v0.2.x series

**New Features**

* Unified multi-language SDK architecture
* Complete OpenAPI client support
* WebSocket real-time data subscription

**SDK Versions**

| Language   | Version | Status |
| ---------- | ------- | ------ |
| TypeScript | v0.2.4  | Stable |
| Python     | v0.1.1  | Stable |
| Go         | v0.1.1  | Stable |
| Rust       | v0.1.1  | Stable |

***

### 2026-01-29

**SDK Updates**

* TypeScript SDK v0.1.26
  * Full KYT API support
  * Webhook endpoint management API

**Improvements**

* KYT transaction risk assessment response time improved
* Webhook signature verification documentation updated

***

### 2026-01-20

**New Features**

* Token liquidity snapshots API (`/v1/token/{chain}/{address}/liquiditysnapshots`)
* Token traders tag API (`/v1/token/{chain}/{address}/traders/tag`)

**SDK Updates**

* TypeScript SDK v0.1.22
  * Added liquidity snapshot methods
  * Type definitions optimized

***

### 2026-01-15

**New Features**

* Webhook system officially released
  * Token creation notifications (`sol.token.created`)
  * Token migration notifications (`sol.token.migrated`)
* Webhook secret rotation API

**SDK Updates**

* TypeScript SDK v0.1.20
  * Webhook endpoint management
  * Secret rotation methods

***

### 2026-01-04

<Note>
  **API v1.4.0** - New Year Update
</Note>

**New Features**

* KYA (Know Your Address) API
* Address risk assessment endpoints
* Batch address queries

**SDK Updates**

* TypeScript SDK v0.1.19
  * Complete KYA API support
  * Batch query optimization

**Improvements**

* Average API response time reduced by 30%
* More detailed error messages

***

## 2025

### 2025-12-23

**Improvements**

* Improved Solana data coverage
* WebSocket heartbeat mechanism optimization
* Token metadata caching strategy improvements

**SDK Updates**

* TypeScript SDK v0.1.15
  * WebSocket reconnection logic optimization
  * Heartbeat timeout configuration

***

### 2025-12-01

<Note>
  **API v1.3.0** - KYT Official Release
</Note>

**New Features**

* 🎉 KYT (Know Your Transaction) API officially released
  * Transaction risk assessment
  * Fund source tracing
  * Risk alert generation
* Token developer info API (`/v1/token/{chain}/dev/{devAddress}/tokens`)

**SDK Updates**

* TypeScript SDK v0.1.14
  * Complete KYT API support
  * Risk assessment methods

**Improvements**

* DEX quote aggregation supports more protocols
* Optimized routing algorithm for large trades

***

### 2025-10-15

**New Features**

* Token security check API (`/v1/token/{chain}/{address}/security`)
* Token mint/burn history API (`/v1/token/{chain}/{address}/mintandburn`)
* Token creation info query (`/v1/token/{chain}/{address}/creation`)

**SDK Updates**

* TypeScript SDK v0.1.11
  * Security check methods
  * Token history queries

**Improvements**

* Price data latency reduced to under 50ms
* K-line data supports more time periods

***

### 2025-09-27

<Note>
  **SDK v0.1.0** - TypeScript SDK Official Release
</Note>

**Major Updates**

* 🎉 TypeScript SDK v0.1.0 officially released
* Complete REST API client
* WebSocket real-time data subscription support

**Features**

* Token API full support
* Wallet API full support
* DEX API full support
* Ranking API full support
* WebSocket subscription methods

***

### 2025-09-18

**New Features**

* Wallet balance update history API
* Wallet PnL calculation API
* Batch token queries

**SDK Updates**

* TypeScript SDK v0.0.12
  * Wallet-related methods
  * Batch query support

***

### 2025-09-08

**New Features**

* WebSocket real-time data push officially released
* Supported subscription types:
  * Token candles (`dex-token-candles`)
  * Token stats (`dex-token-stats`)
  * Token holders (`token-holders`)
  * New tokens (`dex-new-token`)
  * Wallet balance (`wallet-balance`)
  * Wallet trades (`wallet-trade`)

**SDK Updates**

* TypeScript SDK v0.0.7
  * WebSocket client
  * Auto-reconnection support

***

### 2025-09-03

**New Features**

* DEX quote and routing API
* Token K-line data API
* Token market data API

**SDK Updates**

* TypeScript SDK v0.0.4
  * DEX trading methods
  * K-line queries

***

### 2025-09-01

<Note>
  **API v1.0.0** - ChainStream API Official Release
</Note>

**Initial Features**

* 🎉 ChainStream API officially released
* Full Solana chain support
* Core features:
  * Token info and price queries
  * Token holder analysis
  * DEX trading data
  * Wallet balance and stats
  * Ranking API

**SDK Updates**

* TypeScript SDK v0.0.2
  * First usable version
  * Basic API support

***

### 2025-08-31

<Note>
  **TypeScript SDK v0.0.1** - Initial Release
</Note>

* TypeScript SDK first published to npm
* Package: `@chainstream-io/sdk`

***

## SDK Version Overview

### Latest Versions

| SDK        | Version | Release Date | Package Manager                                                               |
| ---------- | ------- | ------------ | ----------------------------------------------------------------------------- |
| TypeScript | v0.2.6  | 2026-02-04   | [npm](https://www.npmjs.com/package/@chainstream-io/sdk)                      |
| Python     | v0.1.3  | 2026-02-04   | [PyPI](https://pypi.org/project/chainstream/)                                 |
| Go         | v0.1.3  | 2026-02-04   | [pkg.go.dev](https://pkg.go.dev/github.com/chainstream-io/chainstream-sdk/go) |
| Rust       | v0.1.3  | 2026-02-04   | [crates.io](https://crates.io/crates/chainstream)                             |

### TypeScript SDK Version History

| Series | Range          | Release Period     | Description                             |
| ------ | -------------- | ------------------ | --------------------------------------- |
| v0.2.x | 0.2.1 - 0.2.6  | 2026-02            | Multi-language SDK unified architecture |
| v0.1.x | 0.1.4 - 0.1.26 | 2025-09 \~ 2026-01 | Feature stable versions                 |
| v0.0.x | 0.0.1 - 0.0.12 | 2025-08 \~ 2025-09 | Early testing versions                  |

***

## Version Policy

### API Versions

* **Major** (v1, v2): Breaking changes
* **Minor** (v1.1, v1.2): New features, backward compatible
* **Patch** (v1.1.1): Bug fixes

### SDK Versions

SDKs follow Semantic Versioning (SemVer):

* **Major**: Breaking changes
* **Minor**: New features
* **Patch**: Bug fixes

### Deprecation Policy

* Deprecated endpoints retained for at least 6 months
* Deprecation warnings added to response headers
* Major changes announced 30 days in advance

***

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