Astria is a Shared Sequencer Network with Celestia underneath. It provides ordering guarantees with soft commitments to chains, relying on Celestia’s DAS network to provide firm commitments and broad data availability. Astria is developing a decentralized sequencing layer that can be shared among multiple rollups. The Astria Stack sequences arbitrary data for rollups, makes it accessible to rollup nodes, enables easy retrieval and verification, and batches rollup blocks before posting them to Celestia.

Zellic conducted a security assessment for Astria from January 8th to January 16th, 2025. During this engagement, Zellic reviewed Astria Shared Sequencer Oracle's code for security vulnerabilities, design issues, and general weaknesses in security posture.