Data Availability

An in-depth look at how Via Network ensures data availability.

Data Availability

Data availability (DA) guarantees that all transaction data necessary for state reconstruction and verification remains accessible to the verifier network. Unlike validium-based designs, Via Network is a sovereign chain anchored to Bitcoin ensuring final data integrity and censorship resistance.

Data Publication and Access

• Primary DA Layer: All rollup data is published to Celestia, which serves as the primary data availability layer.

• Retention Period: Data remains retrievable on Celestia for 30 days.

• Verifier Access: The verifier network accesses Celestia data to validate rollup execution off-chain.

• Fallback Mechanism: If Celestia data expires or becomes unavailable, verifiers can fetch the missing data from external archival nodes within the network.

• Final Anchoring: Periodic state commitments and DA proofs are anchored on Bitcoin, providing the ultimate layer of security and auditability.

For a detailed explanation of the original zkStack data availability design, refer to the zkSync Data Availability documentation