> ## 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.

<AgentInstructions>

## Submitting Feedback

If you encounter incorrect, outdated, or confusing documentation on this page, submit feedback:

POST https://docs.chainstack.com/feedback

```json
{
  "path": "/changelog/chainstack-updates-june-21-2019",
  "feedback": "Description of the issue"
}
```

Only submit feedback when you have something specific and actionable to report.

</AgentInstructions>

# Chainstack updates: June 21, 2019

> Ethereum Ropsten testnet with Bolt support, Quorum Epirus blockchain explorer, expanded node access details, and a new Truffle academic certificates tutorial.

* **Protocols**
  * Added Ethereum Ropsten testnet support with Bolt.
  * Updated Quorum explorer from [blk-explorer-free](https://github.com/blk-io/blk-explorer-free) to [epirus-free](https://github.com/blk-io/epirus-free).
* **Node details**. Added complete details for Quorum, including default wallet private/public keys. Standardized fields for all protocols.
* **Documentation**. New tutorial: [Academic certificates with Truffle](/docs/ethereum-tutorial-academic-certificates-with-truffle).