Celestia launches Blobstream X, which implements modular DA transmission, and has been launched on the Sepolia test network

According to official news, modular blockchain network Celestia announced the launch of Blobstream. Previously known as the Quantum Gravity Bridge (QGB), Blobstream transports Celestia’s data root commitments to on-chain Ethereum light clients. Developers can integrate Blobstream to create high-throughput Ethereum L2, similar to developing smart contracts. Celestia aims to be a modular data collection solution based on Data Availability Sampling (DAS) extensions through Blobstream. DAS allows any user to contribute to scaling rollups directly using Celestia by running sampled light nodes. Although Blobstream relies on attestations from Celestia validators, sampling light nodes can detect validators that retain data or produce invalid blocks and remove them. This provides cryptographic economic guarantees rather than relying on reputation or hidden assumptions of trust. As more users run light nodes, DAS enables Celestia to increase data throughput and support millions of rollups without compromising end-user security. Meanwhile, Succinct Labs has contributed to Blobstream X, verifying on-chain validator signatures via a single ZK light client attestation. Blobstream X has been launched on the Ethereum Sepolia test network, further optimizing Celestia as the DA layer and providing faster on-chain commitments. Following the audit and Celestia mainnet launch in the coming weeks, the community can deploy Blobstream on Ethereum to start streaming DA to developers.