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Ed Felten

Verified account Offchain

@EdFelten

Co-founder and Chief Scientist @Offchain. Professor of Comp Sci & Public Affairs Emeritus @Princeton. Prev: Deputy US CTO at White House. Personal account.
Princeton cs.princeton.edu/~felten Joined May 2008
589 Following 27K Followers 1.6K Posts

Latest posts 5

Ed Felten Verified account @EdFelten
Is it just me, or is this NYTimes article deeply misleading? AI-driven ETH result has theoretical importance but little if any immediate practical importance. Maybe it foreshadows later breakthroughs. But it doesn't "[blow] up a key tenet of [comp sci]". nytimes.com/2026/11/06/sci…
www.nytimes.com How A.I. Just Blew Up a Key Tenet of Computer Science A longstanding hypothesis held that some problems would always be hard for computers to solve quickly. But OpenAI disproved it — raising the possibility of radical new efficiencies.
2 replies 0 reposts 13 likes 1.3K views View on X
Ed Felten Verified account @EdFelten
Cross River is building with @Offchain Enterprise Services

Very excited to support their business as one of the biggest banking as a service companies out there.

Our team will be working very closely with theirs for the build out of a proprietary tokenization engine, all with settlement to @Arbitrum and wallet infra powered by @ZeroDev

The programmable economy is growing, and Offchain promises to be at the center of it.
Offchain Verified account @Offchain 6d
We’re partnering with @crossriverbank to integrate tokenization directly into its lending platform.

@Offchain Enterprise Services brings dedicated engineering together with @Arbitrum One and @ZeroDev wallet infrastructure in a single delivery.

crossriver.com/newsroom/cross…
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5 replies 15 reposts 43 likes 3.3K views View on X
Ed Felten Verified account @EdFelten
Fast Feed + PGA, now live on @Arbitrum, accelerates two halves of the same loop:

Observe → Decide → Bid → Execute

Fast Feed streams ordering + tx data during block construction, before the completed feed publishes (Observe -> Decide). PGA, priority gas auctions determines ordering (priority fee, two rounds per 250ms block), (Bid -> Execute).

Important notes:

Fast Feed can't frontrun. By the time a tx is published, the sequencer has already fixed its position. Think of FF as low latency observation, not insertion.

PGA, similar to timeboost previously, only allows backrunning (not frontrunning or sandwiching) since the mempool is still private.

Excited to finally see this in action on mainnet.
Arbitrum Verified account @arbitrum Sep 24
Arbitrum just got faster.

Introducing Priority Gas Auctions (PGA) and Fast Feed, now live.
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9 replies 4 reposts 38 likes 9.3K views View on X