Avail Data Availability Integrated by Arbitrum, Optimism, Polygon, StarkWare, ZkSync

Those chains include Arbitrum, Optimism, Polygon, StarkWare and zkSync. Users will be able to opt in or out to use Avail for data availability – a service needed by these “rollup networks” to stash the reams of data produced on all the transactions taking place. A key driver for DA solutions is that they can provide a cheaper and faster way of storing data than on the main Ethereum blockchain.