Shared Security in the BLOCKCHAIN
summary
A modular consensus and data layer called Celestia provides shared security so application-specific chains no longer bootstrap their own PoS network, claiming this enables potentially millions of chains. It implements data availability sampling using erasure coding so nodes probabilistically confirm full-block availability without downloading everything, posts blobs (namespaced via a namespace layout) rather than executing transactions, targets optimistic rollups with state fraud proofs, and adapts Tendermint (ABCI++), libp2p and tooling to make it work.
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chapters (9)
- 0:00Introduction
- 1:04What is Celestia
- 2:40Modular blockchain architecture
- 5:50Execution and data availability
- 8:06Data availability sampling
- 10:35Rollups and namespaces
- 12:50Scaling and development
- 14:34Technical challenges
- 19:20Summary and conclusion
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