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Data Availability (DA)
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Data Availability (DA)
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A cryptographic guarantee that all transaction data required to verify a block is fully published and accessible to all network participants.
How this mechanic works
In modular blockchain stacks, Data Availability layers (such as Celestia, EigenDA, and Ethereum's EIP-4844 blobs) enable rollups to post compressed state transitions without congesting Layer 1 execution, dramatically slashing fee overhead.
Related terms
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