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

# DA Layer

Data Availability Layer is not only the storage of B² Network, but also the validation layer of B² Network.

DA Layer consists of three parts: [**Decentralized Storage**](https://github.com/b2network/docs/blob/main/decentralized_storage.md), [**B² Nodes**](/technical-design/da_layer/b2_nodes.md), and **Bitcoin Network**.