Data Availability

Overview

LumiBit offers a comprehensive Layer 2 scaling solution for Bitcoin, utilizing ZK-Rollup as its technological foundation and Bitcoin as its Data Availability (DA) layer. This approach provides a secure, decentralized, fast, and cost-effective interaction experience for the Bitcoin network. Furthermore, it introduces the entire Ethereum on-chain ecosystem to Bitcoin, significantly expanding its capabilities and applications.

Use Bitcoin as DA Layer

“Don’t trust, verify” is a guiding principle in the Bitcoin community. Using Bitcoin as the Data Availability (DA) layer leverages its robust computational power to ensure the security of LumiBit’s Layer 2.

Data Availability refers to the ability to publicly and promptly publish data on a network. In other words, having DA on Bitcoin implies using it as the data availability layer, with the data being verifiable on the Bitcoin network at any time. DA focuses on ensuring data accessibility, not storage permanence, guaranteeing that everyone can access the data within a certain time frame.

The challenge for Bitcoin’s L2 Data Availability (DA) is finding an affordable and effective method for data uploading, publishing, and verification within the Bitcoin network. As rollup transactions are sent to Bitcoin in an aggregated form, the block capacity of Bitcoin limits the size of rollup data. Without increasing Bitcoin’s block capacity, the only solution lies in utilizing more efficient data compression, proof, and verification methods to manage this constraint effectively.

ZK-rollup enables the replacement transaction states with more succinct zero-knowledge proofs, and this applies to account states as well. The complexity of verification and proof generation is shifted off-chain, reducing both the data storage on Bitcoin L1 and the cost for users when submitting transactions on L2. This approach effectively lightens the load on the Bitcoin network and enhances efficiency for users operating within the L2 framework.

LumiBit enhances DA by storing compressed root proofs in UTXOs, ensuring data integrity and accessibility without adding extra burden to the BTC mainnet, and guarantees the security and verifiability of Layer 2 data, ensuring a seamless experience for all users. Our strategic cooperation with mining pools stabilizes DA, leveraging their computational power to maintain network efficiency and control DA costs. The integration of compressed proofs and collaboration with mining pools allows LumiBit to offer a scalable solution that is both cost-effective and environmentally conscious.

LumiBit sets up BTC nodes and leverages the DVN (Decentralized Verifer Network) mechanism for DA between LumiBit and the BTC mainnet. Users can independently execute ZK-rollup proof verifications using open-source clients.

In LumiBit, embracing the Bitcoin community’s ethos of “Don’t trust, verify,” users can independently confirm the proof verification process of Layer 2 nodes, enabling trustless interactions within the network.

Final Thoughts

In conclusion, LumiBit’s unique implementation of ZK-rollup technology and the strategic use of Bitcoin as the Data Availability layer underscore a forward-thinking approach in blockchain scalability. This combination not only propels Bitcoin’s Layer 2 infrastructure but also preserves its foundational principles of security and decentralization. LumiBit’s method stands out as a pioneering solution in the blockchain space, paving the way for more robust and versatile applications within the Bitcoin ecosystem.

Source: https://medium.com/@LumiBitL2/a-zk-based-scaling-solution-with-bitcoin-as-da-b54b5c3a3b5d