> For the complete documentation index, see [llms.txt](https://openx.gitbook.io/openx-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://openx.gitbook.io/openx-docs/understanding-arbitrum.md).

# Understanding Arbitrum

OpenX operates exclusively on the Arbitrum One network (Layer 2 of the Ethereum main network that uses Optimistic Rollups).

If you are unfamiliar with Arbitrum, you can find a lot of resources about the network, its ecosystem, and its mission on the Arbitrum website [https://Arbitrum.io/](https://zksync.io/)

To set up your wallet, please go to <https://chainlist.org> and search for Arbitrum One. You can use the Connect Wallet button to automatically configure your default wallet to use Arbitrum. Use the arrow down to expand for more configuration Arbitrum.<br>

![](https://2389854002-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FMz9f3YUNAPoSwF9tbVc5%2Fuploads%2FSrkX9QUANiXJBMIC36kT%2Fimage.png?alt=media\&token=bcf534f1-f4f6-4023-baac-d2c531a56cbb)