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

# Chainstack updates: December 31, 2019

> Corda 4.3 with single-JAR CorDapps, Quorum 2.4.0 with learner nodes and Tessera 0.10.2, MultiChain 2.0.3, and Bitcoin 0.19.0.1 with txindex enabled.

* **Protocols**
  * Corda 4.3 support. You can also now install CorDapps containing workflows and contracts in a single JAR file.
  * Quorum 2.4.0 support. Learner node role support. [Tessera](https://docs.tessera.consensys.net/) 0.10.2 support.
  * MultiChain 2.0.3 support.
  * Bitcoin 0.19.0.1 support. Bitcoin nodes now run with the `txindex` flag allowing to query any transaction on the blockchain.
* **Documentation**. Context-sensitive documentation links in the platform UI.