Avail is a Web3 infrastructure layer designed to facilitate the scalable and trust-minimized interaction of modular execution layers. It comprises three main components: Avail DA (Data Availability), Avail Nexus, and Avail Fusion. These components collectively create the Avail Unification Layer, which aims to tackle the primary challenges related to blockchain scalability, interoperability, and security.
Avail DA prioritizes ordering and publishing transactions while allowing users to verify block data availability without downloading entire blocks. Its data-agnostic nature supports various execution environments, making it a strong foundation for diverse blockchain applications. Avail DA's system design includes three main layers: Data Hosting and Ordering, Execution, and Verification/Dispute Resolution. It uses a Nominated Proof-of-Stake (NPoS) consensus model for scalability and energy efficiency, and employs Substrate's BABE/GRANDPA consensus. The transaction lifecycle involves several key steps, including transaction submission, data extension and erasure coding, commitment creation, block propagation, and the use of a light client network for decentralized data verification.
Avail Nexus connects multiple blockchains within and outside the Avail ecosystem, using Avail DA as the root of trust. It aims to unify the Web3 ecosystem, providing a seamless user experience to engage with multiple rollups and external chains effortlessly.
Avail Fusion enables native assets from major ecosystems like Bitcoin and Ethereum to be staked alongside Avail's native assets, enhancing Avail's economic security and marking a significant milestone in blockchain technology.
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