The main difference between data layers

  • Cost: kzg proofs are expensive and take considerable time for validators to generate while fraud proofs are only generated during disputes (and can be cheap to generate if done correctly).
  • Assumptions: Light nodes need to wait some period to receive fraud proof for a block, which is only considered valid until the period has finished without receiving any fraud proofs. With kzg proofs, the block is valid as soon as they have verified a valid kzg proof — of course along with their data availability sampling.

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Celestia scholar

Celestia scholar

Modular blockchains | rollups | data availability