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

# Introduction

Welcome to the Constant Finance **Public Beta** documentation. This guide introduces the protocol's fixed-rate lending model and the testnet deployment currently available on Ethereum Sepolia.

Constant Finance brings borrowers and suppliers together through signed Orders. Once compatible terms are matched, the protocol opens an isolated Position for the borrower and issues Constant NFTs that represent supplier claims.

Explore the protocol through the sections below:

* [Overview](/docs/introduction/overview.md) introduces the model, the participants, and the language used throughout this guide.
* [Concepts](/docs/introduction/concepts.md) follows a loan from Orders and matching through repayment, refinance, and liquidation.
* [Deployment](/docs/introduction/deployment.md) records the current Sepolia contracts, supported assets, and risk configuration.
* [FAQ](/docs/faq.md) answers common questions about the roadmap, product and protocol.

This documentation covers capabilities that are deployed, connected, and usable through the current stack. A feature is not presented as available simply because related code exists.

<table data-view="cards"><thead><tr><th></th><th data-hidden data-card-target data-type="content-ref"></th></tr></thead><tbody><tr><td><img src="https://3028039779-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FmTayVAQkA2pbUF3rUn9z%2Fuploads%2Fgit-blob-b8de9879716a5b59fb4e4a8e6737c41b492bb4cb%2Fconstant-finance_small.png?alt=media" alt="" data-size="line"> <strong>Visit</strong></td><td><a href="https://constant.finance/">https://constant.finance/</a></td></tr><tr><td><img src="https://3028039779-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FmTayVAQkA2pbUF3rUn9z%2Fuploads%2Fgit-blob-a6bd74004dfcfeeae51a164719703d2aca29f244%2Fx_small.png?alt=media" alt="" data-size="line"> <strong>Follow</strong></td><td><a href="https://x.com/constant_fi">https://x.com/constant_fi</a></td></tr><tr><td><img src="https://3028039779-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FmTayVAQkA2pbUF3rUn9z%2Fuploads%2Fgit-blob-0e0ffc2d39b678851844d1a70eee2fd1cc463fe0%2Fdiscord_small.png?alt=media" alt="" data-size="line"> <strong>Join</strong></td><td><a href="https://discord.com/invite/gCXeqHYCXC">https://discord.com/invite/gCXeqHYCXC</a></td></tr></tbody></table>