# EthStorage - Building a Modular Storage Layer for Ethereum on EIP-4844

- Channel: [EthPrague](https://streameth.org/ethprague)
- Date: 2024-06-01
- Duration: 25:40
- Watch: https://streameth.org/watch/665833d3036a981493b0bfab
- Download: https://vod-cdn.lp-playback.studio/raw/jxf4iblf6wlsyor6526t4tcmtmqa/catalyst-vod-com/hls/dda0jp8vxfe35p2f/1080p0.mp4

## Description

EIP-4844 is the much anticipated native Ethereum data availability (DA) solution in the upcoming Ethereum Cancun upgrade.  However, to limit the storage requirement of the validators, EIP-4844 will discard the DA data (namely binary large objects, BLOBs) older than 18 days. In this talk, we introduce EthStorage, an Ethereum L2 solution to offer long-term available solution for EIP-4844 BLOBs with on-chain proof of storage verification.  By indexing the BLOBs on-chain and storing BLOBs off-chain, EthStorage can scale to hundreds of Terabytes or even Petabytes at 1/100x to 1/1000x of Ethereum storage cost. We will demonstrate the EthStorage testnet that is integrated with EIP-4844 on the Ethereum testnet, and showcase prototypes for new Ethereum applications like vitalik's blog, decentralized Dropbox, dynamic NFTs, etc.