DAS

Definition ∞ DAS typically refers to Data Availability Sampling in blockchain contexts. Data Availability Sampling is a technique where lightweight nodes verify that block data is available without downloading the entire block. Instead, these nodes download only small, random portions of the data and, with high probability, can confirm the full data’s existence. This method is crucial for scaling blockchains by allowing many users to check data availability efficiently, supporting rollups and other layer-2 solutions.
Context ∞ DAS is a central component in the development of modular blockchains, particularly for layer-2 scaling solutions like optimistic and zero-knowledge rollups. It addresses the data availability problem, which is critical for the security and functionality of these off-chain processing layers. The ongoing technical work focuses on enhancing the cryptographic guarantees and practical implementation of DAS to support high-throughput, secure blockchain ecosystems.