BOB has achieved one of its most important milestones! It is now the first blockchain to implement Zero-Knowledge (ZK) proofs as fraud proofs inside a hybrid rollup architecture. This gamechanging combo combines the efficiency and scalability of ZK rollups with the low cost and simplicity of optimistic rollups. Together, these two technologies represent a significant move forward for layer-2 scaling solutions. This successful integration skyrockets BOB to Stage 0 on L2Beat. This accomplishment ushers in a new age of security and accessibility to decentralized finance (DeFi).
BOB’s hybrid ZK rollup brings three main benefits accessibility, low operating costs, and rapid finality. With BOB, we’re laying the groundwork to transform how the optimistic rollup fraud resolution process works. They are using ZK proofs to set an entirely new level of trust and transparency. Through this innovative technique, BOB’s sequencer enables anybody to counter proposals produced by BOB’s sequencer. They require a very low collateral of 0.5 ETH, far less than the hundreds of ETH needed to call fraud in non-ZK fraud proof systems.
"The launch of our fully functioning proof system brings full Ethereum-level security to the BOB L2, a major milestone on our path to decentralization. With this upgrade, BOB becomes the first Hybrid ZK rollup and progresses to Stage 0 on L2Beat, while most rollups in the space will remain in the ‘Others’ category due to the absence of a working proof system. This marks a new standard of trust and transparency for our users. The final step to achieve Stage 1 status is the launch of our security council, which is forthcoming. From there, reaching Stage 2 will involve opening up proposals to anyone. This hybrid rollup model reflects our hybrid vision: combining the strengths of multiple systems to unlock the full potential of Bitcoin DeFi." - Alexei Zamyatin
This lower barrier to entry democratizes the validation process, which makes the network more secure and decentralized. This breakthrough zero-knowledge proofs technology greatly enhances scalability and security in layer-2 architecture.
Our partnership with RISC Zero has been deeply important in allowing this groundbreaking integration to come to life.
"This is exactly what we envisioned when we worked with RISC Zero to build the OP Kailua integration. With ZK fraud proofs running inside our managed OP Stack environment, BOB gets Ethereum-grade security and withdrawal times measured in hours, not days. Our partnership with RISC Zero enables us to integrate this capability into any rollup seamlessly. This is the frontier of rollup design." - Andrew Huang
This partnership makes it easy to integrate this new capability into any rollup transparently. It lays the groundwork for hybrid ZK rollup technology to be used at scale.
The upcoming launch of BOB’s security council will be the last piece needed to reach Stage 1 status on L2Beat. With the security council established, BOB will move to Stage 2. To hold the process accountable, he will make proposals public and provide a four-day window for anyone to submit challenges. The system’s continuity has been demonstrated. In the near future, we hope to shrink this window down to a few hours at most, significantly increasing transaction finality even further.
"Optimistic rollups have driven adoption thanks to their obvious benefits; low costs and high throughput, but the 7-day challenge window has hindered true scalability. OP Kailua changes that by using ZK fraud proofs. It brings the speed and finality of ZK to an optimistic framework; a breakthrough that combines the best of both worlds and sets the stage for the next evolution of DeFi." - Jacob Everly
BOB’s success makes game-changing improvements to withdrawal times, which have been made impractically long due to the challenge periods required with optimistic rollups.
