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Stoked to work with 0xSybil and Yiyun/Miao on understanding the design space of sybil-proof mechanisms!

Helios is becoming a multichain light client for Ethereum. It has become clear that light clients are fundamental to Ethereum scaling. A future with thousands of rollups doesn’t feel far away, and the closer we get, the more critical rollup interoperability will become. 🧵👇

Reminder to apply by tomorrow to spend next summer working with with us on some of the most interesting problems in the space in cryptography, consensus, mechanism design, and much more

fikunmi toly 🇺🇸 Eugene Chen my thesis is that bidding is broken on solana because knowing how to optimally bid in high dimensional fee markets is inherently extremely hard. You can show that equilibria bidding under pay as bid mechanisms has provably bad welfare in these regimes. Of course real contention

Turns out a lot of the mechanisms we see in crypto can trace their roots back to foundational econ work from the 80s studying how political parties decide to make investments. Check out the talk to learn more!

I think there are two separate issues in the discussion. (1) Will block building or validation or proving be the ultimate bottleneck? (2) Is a nuanced fee market necessary for effective admission control, and, if so, how to facilitate one? Below are some of my opinions.

Part of the problem is we didn't agree on a name for the class of burning posted price mechanisms that you can plug any controller into. Imo burning posted price is still the correct choice but the specific controller in 1559 is clearly busted

Can a blockchain stay secure even if almost all validators are compromised—way beyond the usual “51% attack” limit? Excited to share our new work on blockchain consensus under adversary majority, where we tackle this big question! a16zcrypto.com/posts/article/…

Excited to share our new paper, "Accountable Liveness", w/ Andrew Lewis-Pye Tim Roughgarden Luca Zanolini. We explore when and how adversarial nodes can be punished if they stall transaction confirmation in blockchains. eprint.iacr.org/2025/693