[GUEST ACCESS MODE: Data is scrambled or limited to provide examples. Make requests using your API key to unlock full data. Check https://lunarcrush.ai/auth for authentication information.]

![OLTOAK Avatar](https://lunarcrush.com/gi/w:24/cr:twitter::857822996.png) Akin [@OLTOAK](/creator/twitter/OLTOAK) on x 9735 followers
Created: 2025-07-25 05:20:00 UTC

GM GM @build_on_bob Snappers!

BOB just unveiled a game-changer: the first live ZK fraud proofs on a rollup.

Developed with RISC Zero, Boundless, and OP Kailua (an OP Stack extension), this upgrade merges the cost-efficiency and scalability of optimistic rollups with the robust security and speed of ZK validity proofs.

The real kicker? Users can now trigger validity proofs on demand, enabling instant Ethereum withdrawals when needed. This fully operational proof system sets BOB apart from most rollups, many of which lack functional proofs and linger in L2BEAT’s Others category.

With this, @build_on_bob enters Rollup Stage 0, advancing toward full maturity as a hybrid ZK rollup. This isn’t just a tech upgrade—it’s a massive boost for Bitcoin DeFi and the broader L2 ecosystem.

Join the livestream with BOB, RISC Zero, Boundless, Conduit, and L2BEAT on July 31—it’s a must-watch.

My calendar’s already set!
       @cookiedotfun 
       @tenprotocol

![](https://pbs.twimg.com/media/Gwpd_zQW8AAoNVP.jpg)

XXX engagements

![Engagements Line Chart](https://lunarcrush.com/gi/w:600/p:tweet::1948614187359285430/c:line.svg)

**Related Topics**
[robust](/topic/robust)
[op](/topic/op)
[boundless](/topic/boundless)
[rollup](/topic/rollup)
[zk](/topic/zk)
[bob](/topic/bob)

[Post Link](https://x.com/OLTOAK/status/1948614187359285430)