"Avail has announced the introduction of its Data Availability (DA) layer to Arbitrum, Optimism, Polygon, StarkWare and zkSync. This will help developers build more scalable, cost-effective and interoperable networks. 🚀 New functionality will be available upon Avail's mainnet launch, expected in the coming months weeks Avail is positioned as a data availability layer for Optimism, Validium and other solutions working on its basis. This will allow DA to be hosted and verified off-chain, ensuring the security and correctness of transactions."