> For the complete documentation index, see [llms.txt](https://docs.ethstorage.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ethstorage.io/readme.md). # Overview ## What is EthStorage EthStorage is a modular and decentralized storage Layer 2 that offers programmable key-value storage powered by DA. It enables long-term DA solutions for Rollups and opens up new possibilities for fully on-chain applications like games, social networks, AI, etc. ## Motivation The main motivation behind EthStorage is to provide a long-term DA based on Ethereum. EIP-4844 introduces data blobs that enhance the throughput and efficiency of L2 scaling solutions like rollups. However, the blob data is only available temporarily, meaning it will be discarded in a few weeks. This has generated a significant impact: the inability of L2 to unconditionally derive the latest state from L1. If a certain piece of data can no longer be retrieved from L1, a rollup may not be possible to sync the chain. With EthStorage as a long-term DA solution, L2s can derive from their DA layer (Ethereum DA, Celestia, EigenDA, etc. + EthStorage) any time they want. EthStorage also opens up new possibilities for fully on-chain applications like games, social networks, AI, etc.