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

# Yona Architecture

### Architecture

Yona Network is Bitcoin's fastest Layer 2, powered by the Solana Virtual Machine (SVM). Yona Network utilizes modular architecture, combiningthe best pieces of the stack:

* **Settlement: Bitcoin** - Yona settles to Bitcoin and uses BTC as its gas token.
* **Execution: Solana Virtual Machine (SVM)** - Yona runs the highly performant SVM as its execution environment.
* **Data Availability** - Yona Network posts its data to DA for scalable data availability (DA).
* **Proving: RISC Zero** - Yona uses RISC Zero to implement ZK Bitcoin Light client and verify ZKPs for the light node proofs.

### Components

There are three classes of actors in the Yona rollup architecture: 

1. Execution nodes.
2. Historical nodes.
3. Bridge nodes (information about this type of node - in the section ‘Yona BTC Canonical Bridge).
4. Prover nodes.
5. Spreading module.
6. Proofs aggregation and comparison module.

<figure><img src="/files/EpFr5JhC5M7TPttlit0p" alt=""><figcaption></figcaption></figure>