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Celestia

Celestia is a data availability (DA) layer that provides a scalable solution to the data availability problem. Due to the permissionless nature of the blockchain networks, a DA layer must provide a mechanism for the execution and settlement layers to check in a trust-minimized way whether transaction data is indeed available.

Key features​

Two key features of Celestia's DA layer are data availability sampling (DAS) and Namespaced Merkle trees (NMTs). DAS enables light nodes to verify data availability without needing to download an entire block; NMTs enable execution and settlement layers on Celestia to download transactions that are only relevant to them.

  • Data availability sampling light clients play an important role in the security, scalability and interoperability of the Celestia ecosystem.
  • Celestia light clients enjoy nearly the same security as full nodes and do not rely on an honest consensus majority for state validity.
  • Celestia's implementation integrates 2D Reed-Solomon erasure coding with Tendermint consensus and components of IPFS to achieve data availability sampling.
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