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

# How Arenas uses Atomica

Arenas does not have its own credit or liquidity contracts. It uses **Atomica** (Base) as the credit engine and **Aave v3** (Base) as an optional liquidity source, and adds a single contract — the **Credit Delegation Module (CDM)** — to connect them.

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### Who owns what

| System      | Provides                                                                                    | Contracts              |
| ----------- | ------------------------------------------------------------------------------------------- | ---------------------- |
| **Atomica** | Financing markets, pools, obligations, the request → approve → draw-down → repay lifecycle. | Atomica’s own (Base)   |
| **Aave v3** | Overcollateralized supply/borrow and credit delegation.                                     | Aave’s own (Base)      |
| **Arenas**  | The **CDM**, which delegates Aave borrowing power into Atomica pools.                       | One contract — the CDM |

***

### What Atomica handles

Every Arenas financing market **is** an Atomica market. Atomica enforces:

* The shared **request → approve → draw down → repay** lifecycle.
* Fee and permission **limits**.
* One standardized engine for liquidity, disbursement, repayment and accounting.

See [**Atomica → Key Concepts**](/atomica/key-concepts.md) and [**Atomica Protocol**](/atomica/atomica-protocol.md).

***

### What Arenas adds

Arenas’ contribution is the **CDM** and the product around it:

* **Boosted yield** — the CDM lets a supplier keep collateral on Aave, delegate its borrowing power, and route the borrowed liquidity into Atomica pools to earn the spread. See [**Credit Delegation Module**](/arenas/credit-delegation.md) and the [**Aave Market**](/arenas/aave-market.md) strategy.
* **Distribution** — the app ([app.arenas.fi](https://app.arenas.fi)), lending experience ([arenas.fi](https://arenas.fi)), and the API/SDK/CLI in [**Build with Arenas**](/build-with-arenas/build.md).

In short: **Atomica is the credit engine, Aave is optional liquidity, and Arenas is the CDM that connects them plus the product experience on top.**