> For the complete documentation index, see [llms.txt](https://docs.bunzz.dev/product-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.bunzz.dev/product-docs/introduction/faq.md).

# FAQ

## Q: What "only one root contract is allowed" error?

Ans: Currently **Bunzz** supports smart contracts which does have only one root contract.

## Q: Why I'm getting compiling error?

Ans: Your uploaded smart contract's solidity version must be `0.8.1`

## Q: Can I use external modules?

Ans: Yes, but only `openzeppelin(v4.3.2)` is supported for external modules.

For any questions or feedback you may have, please feel free to contact us on [Bunzz Discord Server](https://discord.gg/XPh4QHuKYE).