> ## 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: October 17, 2019

> Corda 4.1 with network map service and notary, Quorum 2.3.0 with Tessera, in-org user invitations, hourly metered usage, and a no-ticket-scalping CorDapp.

* **Protocols**
  * Corda 4.1 support. You can now deploy a consortium network with network map service, doorman, and notary. Dynamically add and remove participant nodes. Install and remove CorDapps.
  * Quorum 2.3.0 support. Replaced Constellation transaction manager with Tessera.
* **User management**. Invite user s into the organization.
* **Billing**. View metered usage cost for the current billing period, updated hourly.
* **Documentation**
  * Corda general description and Corda operations.
  * New tutorials: [No ticket scalping CorDapp](/docs/corda-tutorial-no-ticket-scalping-cordapp) and [Trust fund account with Remix](/docs/ethereum-tutorial-trust-fund-account-with-remix).