Astria
Key Takeaways
- Astria is the shared sequencing layer of the Celestia ecosystem.
- Rollups using Astria can choose between the methods of soft commitment, receiving ordered blocks directly from the sequencing layer, and hard commitment, receiving ordered blocks from the DA layer.
1. Overview
Astria, as the shared sequencing layer of the Celestia ecosystem, is a project aiming to solve the issues originating from centralized sequencers.
2. Transaction Lifecycle
In the case of general rollup networks not using a shared sequencing layer, user transactions are individually sequenced and executed by the centralized sequencer of the rollup networks, with the results recorded on the DA layer. On the other hand, the transaction lifecycle of rollup networks that use Astria as a sequencing layer is as follows:
- Users submit transactions to the Astria shared sequencing layer.
- Shared sequencers create a single ordered block for multiple rollup networks connected to the sequencing layer and submit it to the DA layer.
- Rollup networks read the ordered block directly from Astria or from the DA layer, execute it, and create a new state proof.
3. Sequencing
There is no publicly disclosed information yet about the consensus mechanism for selecting a sequencer to decide the order for each block.
Finality for sequencing is provided in two ways. The soft commitment method allows the nodes of the rollup to retrieve the ordered block directly from Astria, relying on the PoS security level of Astria. Conversely, the hard commitment method waits for Astria's ordered block to be included in the DA layer, retrieves it, and can achieve a higher level of security.
4. Data Availability
Astria uses Celestia as a DA layer. The ordered block created in Astria is submitted to the DA layer, and rollup networks can retrieve the ordered block from the DA layer for execution.
5. Use Cases
5.1 Astria EVM
Astria EVM is the first EVM rollup that uses Astria as a shared sequencing layer, a sovereign rollup based on Celestia.
6. Team
7. Resources
- Website | Docs | Blog | Twitter
- Introducing Astria: The Shared Sequencer Network by Astria
- The Shared Sequencer by Maven11
