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

# SDK

> Additions and updates to the LI.FI SDK

<Update label="April 2026">
  ## Major Release

  * **v4 released** — new major version of the SDK, now adopted by Jumper
</Update>

<Update label="February 2026">
  ## Improvements

  * Improved error handling and reliability in the Intents stack
  * Better fee handling and fallback logic for solver-based routes
</Update>

<Update label="January 2026">
  ## Features

  * **Smart slippage selection** for major and stable assets
  * Improved Bitcoin address support including xpub and better UTXO handling
</Update>

<Update label="December 2025">
  ## Changes

  * Updated Chainflip integration
</Update>

<Update label="November 2025">
  ## Features

  * **Permit2 refactor** for improved token approval flows
  * Fixes for multi-step route estimation, slippage handling, and approvals
</Update>

<Update label="October 2025">
  ## Features

  * Support for **all Bitcoin address types** including nested SegWit
  * Updated **OKX v6** integration
</Update>