> For the complete documentation index, see [llms.txt](https://docs.unitindex.org/theunit/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.unitindex.org/theunit/unit-etf/contracts.md).

# Contracts

Welcome to the documentation of the UNIT ETF contracts.

UNIT enables any human to generate TINU, crypto’s first indexed flatcoin backed by crypto collateral, providing both market growth potential and security. Explore how the system works.

## The UNIT Smart Contract Modules System

<figure><picture><source srcset="/files/drz3bHSsHDLWU6dfMiYE" media="(prefers-color-scheme: dark)"><img src="https://1941831380-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-MgADBdMI31_KnGzYflT%2Fuploads%2FYGpsUrgdaw6ro8hQ5n9Y%2FUNIT%20diagram%20white%20mode.png?alt=media&amp;token=e03a32d5-0976-4f64-bdcb-9658c623839f" alt=""></picture><figcaption><p>UNIT System Diagram</p></figcaption></figure>