> ## 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If you encounter incorrect, outdated, or confusing documentation on this page, submit feedback: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-august-31-2022",
  "feedback": "Description of the issue"
}
```

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

</AgentInstructions>

# Chainstack updates: August 31, 2022

> Arbitrum support, an L1-to-L2 messaging tutorial, and seven new crypto payment options including Dogecoin, Litecoin, Dai, BCH, ApeCoin, SHIB, and USDT.

* **Protocols**. [Arbitrum](/docs/protocols-networks) support.
* **Documentation**. Arbitrum operations, [simple L1 to L2 messaging tutorial](/docs/arbitrum-tutorial-l1-to-l2-messaging-smart-contract).
* **Crypto payments**. In addition to the previously available BTC, ETH, and USDC, you can now [top up your balance](/docs/manage-your-billing) with Dogecoin, Litecoin, Dai, Bitcoin Cash, ApeCoin, SHIBA INU, and USDT.