Proof Data Availability

Availability

Proof Data Availability is the guarantee that the data required to verify a cryptographic proof, particularly in the context of Layer 2 scaling solutions like rollups, is accessible to all relevant parties. This means the underlying transaction data for a rollup block must be published to the Layer 1 blockchain or a highly available data layer. Without this availability, the security model of rollups breaks down, as fraud or incorrect state transitions cannot be proven.