Ed Felten

Co-founder and Chief Scientist @Offchain. Professor of Comp Sci & Public Affairs Emeritus @Princeton. Prev: Deputy US CTO at White House. Personal account.

[Ed Felten @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 @arbitrum]

Arbitrum just got faster.

Introducing Priority Gas Auctions (PGA) and Fast Feed, now live.

[Ed Felten @EdFelten]

@binarybits People have been using software to help them write better software since at least the 1950s. You could argue that RSI started then. Year after year, software has done more and more of the work involved in creating new software.

[Offchain @Offchain]

Happy birthday @Arbitrum!

5 years ago in 2021 Arbitrum went live for the very first time as an @ethereum L2

Where it all began at Princeton as a research project led by our founders @sgoldfed, @hkalodner and @EdFelten

And today we’re proud to see Arbitrum become the backbone of finance powering the programmable economy

[Lumi @zkLumi]

=== @Offchain’s stance on Native AA: EIP-8141 vs EIP-8130 ===

We are very happy that ACD is considering Native AA as a Hegota headliner, and think it is essential for L1 to adopt it.

For @Arbitrum, we evaluate Native AA designs based on throughput, DoS risk, DevEx, and wallet UX/security.

TLDR ->
• To support 8141 in Arbitrum Nitro, we need pure verification frames to become the default validation path. We are working with @ethereumfndn, @ethlabs_org, @base, & @WalletConnect on this direction.

• We also support an optional Guarantor mechanism, where another account can safely pay for the transaction. We will propose this separately.

• Offchain is reviewing the prospect of proposing that the Arbitrum DAO adopt 8130 first. It provides the guarantees needed today, covers the main user flows & does not prevent adding 8141 later.

• We think 8130 deserves genuine consideration in this headliner process, but we are not explicitly asking ACD to adopt it.

• If ACD converges on a modified 8141 for L1, we will support this effort and reconsider implementing it alongside 8130.

What matters most to us: Native AA standards designed with L2s in mind, in compatible ways, so wallets and infra can support them.

Full statement below 👇

[Ed Felten @EdFelten]

Having taught @smehmood when he was younger, I can attest that he is not a "random engineer." Not surprised to see him building something big.

[Sajid Mehmood @smehmood]

never underestimate 2 random datadog engineers 🙂

[Steven Goldfeder @sgoldfed]

in many ways @arbitrum has consistently been ahead of its time:

> we argued hard for the advantages of our interactive proof design (once controversial but now standard for anyone building an optimistic rollup)

> we chose to create a business model (at a time when believe it or not this was highly controversial)

> we focused on defi primarily before most people knew what perps were and after many had abandoned defi

> we created a dedicated blockchain offering when everyone said "we don't need more chains"

every time there was backlash.

Now it feels like the industry is finally aligning with the direction we've had since day 1:

to build robust and performant financial infrastructure

I'm incredibly proud of the team at @offchain's ability to ship world class products at such an incredible pace.

we'll keep shipping, even if most people don't understand the need for what we're building right now.

just like in past, the industry will understand soon enough.

[Ed Felten @EdFelten]

Does money buy success in MLB? 2026 statistics suggest that payroll explains only 3% of the variance in teams' winning percentage.

[Steven Goldfeder @sgoldfed]

some arbitrum bd principles

1 - no need to be the loudest on the timeline. just keep building

2 - no ego. stay humble and just try to help teams building with us win (both on arb1 and dedicated arbitrum chains)

3 - we have limited resources but do our best to help everyone, with an extra focus on net new, innovative ideas

4- we don’t only help the ones already winning. in fact while we know who’s winning today, we don’t know who tomorrow’s winners will be, and any good idea can break out

[Vlad Tenev @vladtenev]

One of the things we've learned from our Robinhood Chain mainnet launch is that ecosystems can grow incredibly quickly when there is exceptional engineering behind them

Huge credit to the Robinhood engineering team, and congrats to our friends and partners @arbitrum.

[Steven Goldfeder @sgoldfed]

Institutions are joining the programmable economy and Arbitrum is the backbone that will power it all.

[Steven Goldfeder @sgoldfed]

Over the past year, Offchain has worked closely with Robinhood to help bring their onchain strategy to production. That work started with supporting Stock Tokens on Arbitrum One and has now progressed to Robinhood launching its own dedicated blockchain on the Arbitrum Platform.

This is exactly why we built Offchain Enterprise Services: to help ambitious fintechs and institutions design, launch, and scale production-grade blockchain infrastructure.

Robinhood was our first Enterprise Services partner, and yesterday’s launch is a major proof point for what this offering is designed to enable.

Arbitrum acts as the platform. Offchain brings the deep protocol expertise, infrastructure support, and execution experience to help partners move from ambition to production.

Blockchain will power the future of the financial system.

Our mandate at Offchain is to build the infrastructure that makes that future real.

[A.J. Warner @ajwarner90]

This is a major milestone for @zerodev and the broader @Offchain product suite.

We have been relentlessly focused on providing the infrastructure to support the programmable economy and providing the most seamless UX is absolutely critical.

ZeroDev has evolved into a full product suite that developers can utilize to power their entire onchain experience. @decentrek can been leading these efforts for many years and today is the next chapter in his work to bring the world onchain.

Go programmable. Go ZeroDev. If you haven't already, sign up and try it all out!

[Harry Kalodner (💙,💙) @hkalodner]

Embedded wallets solved part of the onboarding problem.

Smart accounts solved part of the flexibility problem.

ZeroDev Wallet brings those layers together.

Embedded wallet UX, smart account depth, and gasless programmable flows through one platform.

[Ed Felten @EdFelten]

The best onchain products will hide complexity from users without giving up control for developers.

That is the promise of programmable accounts.

ZeroDev Wallet brings embedded wallet UX and smart account infrastructure into one platform.

Proud to help bring this next phase of ZeroDev to market.

[ZeroDev @ZeroDev]

ZeroDev Wallet is here.

It completes the ZeroDev platform by giving teams one place to build, launch, and scale programmable accounts.

Embedded wallets. Smart accounts. Gasless transactions. Recovery. Session keys. Automation.

Better onchain products, shipped faster.

[Ed Felten @EdFelten]

Very happy to see Robinhood Chain Mainnet now live.

One of the biggest strengths of @Arbitrum’s infrastructure is that it lets enterprises build whatever best fits their business.

Robinhood's journey illustrates that well: launch tokenized stocks on Arbitrum One, validate with real users, then move to dedicated infrastructure as requirements around performance, security, and compliance become more specialized.

This is why the Arbitrum Platform is so powerful. Enterprises can customize and evolve their infrastructure as their products and requirements evolve.

As more financial products move into the programmable economy, different categories will need different infrastructure.

Our goal is to give enterprises that flexibility while they scale the next generation of finance.

Looking forward to seeing what developers build on the Robinhood Chain.

[Arbitrum @arbitrum]

Most platforms ask fintechs to make a bet before they know what customers want.

The Arbitrum Platform lets our customers do the opposite.

@RobinhoodCrypto launched Classic Stock Tokens on Arbitrum One, then migrated to a dedicated blockchain to customize performance, throughput, and governance.

Here’s the story: https://t.co/BHpQA8oST6

[Alex Stamos @alexstamos]

It's been two weeks and the leading US model, Fable, is still banned by the White House with no explicit Congressional Authorization, no written rule that was broken, and no technical justification. In the meantime, our Chinese adversaries released a model that rivals our best.

[Arbitrum @arbitrum]

Arbitrum has been named to the inaugural @FortuneMagazine Crypto 100.

Together with our ecosystem, we're building the finance-native platform powering the programmable economy for builders, enterprises and institutions.

Thank you to everyone building alongside us.

[Steven Goldfeder @sgoldfed]

JUST IN: LG is looking to revolutionize the advertising industry, and they’re building it on Arbitrum 👀

https://t.co/xSlIgX5sFp

[Ed Felten @EdFelten]

Sad to hear of the passing of Peter Neumann, a respected and beloved mentor to me and many other infosec researchers. Among other things, Peter helped open my eyes early to the role of tech in public policy. We need more like him.

The Times has a good obit: https://t.co/CSW4Pzcb27

[Ed Felten @EdFelten]

This is a big step for us at @Offchain.

Over the years, our team has been contributing and bringing new innovations across different layers of the stack:

Scaling Ethereum: @arbitrum
Advancing L1 consensus: @prylabs
Innovating smart accounts: @zerodev

Each has played a role in pushing crypto infrastructure forward.

Bringing them together puts us in a strong position to support institutions coming onchain with the flexibility and ownership they expect.

Excited for this new chapter and looking forward to sharing what’s coming with everyone.

[Offchain @Offchain]

We're now Offchain.

A new chapter focused on powering institutions as they move onchain.

What we’ve built across @arbitrum, @prylabs and @zerodev is coming together into something bigger.

This is just the first step. Stay tuned.

https://t.co/5KulpAzuXa