Glossary
Avail
A modular data-availability layer spun out of Polygon, providing data-availability sampling for rollups and other modular stacks.
Avail launched as Polygon Avail and was spun out into an independent project in 2024. Its job is the same as Celestia's and EigenDA's: publish rollup data and prove via data-availability sampling that the data is fully published, so anyone can reconstruct and verify the rollup's state.
The chain uses KZG commitments over polynomial-encoded data and is secured by its own NPoS validator set. Several rollup stacks (including some OP Stack and ZK Stack chains) post their data to Avail as a cheaper alternative to Ethereum blobs.