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

# Dens

### Dens: Asset Wrappers

<figure><img src="/files/gWY5KwDNSO6XhyvmjZps" alt=""><figcaption></figcaption></figure>

Each Den is an `ERC-20 TOKEN` smart contract vault that can hold a single or multiple assets weighted according to specified ratios.

* **Immutable Fees:**\
  Each Den has a set fee structure that cannot be changed once established. A special liquidity pair (Den LP) is also created on Kodiak for each Den.
* **Fee Conversion:**\
  All fees generated within the Den are converted into `ARBERA` and distributed to LP Stakers.
* **ERC20 Tokens:**\
  Dens are represented as programmable `ERC-20` receipt tokens, known as `brTOKEN`.

### Example: **Kodiak’s KDK token**:

* A Den was explicitly created for the `KDK` token, denoted as `brKDK`.
* A corresponding liquidity pair, `brKDK-HONEY` LP was also established on Kodiak DEX. This pair will trade against all available `KDK` liquidity on the chain. &#x20;

<figure><img src="/files/oPPXtDDYScZ8tRPNnrHq" alt=""><figcaption></figcaption></figure>

In this setup, users can engage with the Den by wrapping their KDK tokens into `brKDK` and providing liquidity to the `brKDK-HONEY` LP, earning `ARBERA` buyback rewards, `BGT`, and more by contributing to the ecosystem.

<figure><img src="/files/m4PIUc6qV6y1ojdu0U73" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/zJl4vKOx9mBsGr2QgVg2" alt=""><figcaption></figcaption></figure>