Author: Sophia Brown

The Ethereum Foundation’s Trillion Dollar Security (1TS) initiative is proud to announce a grant allocation to Freedom of the Press Foundation (FPF) to support the continued development of WEBCAT. WEBCAT is an open source tool that lets browsers verify that code served by an enrolled website matches what its developers published. The grant will also help bring that protection to Ethereum wallets and apps. Closing the front-end verification gap The grant targets a gap in how web applications are secured today. HTTPS authenticates the site you connect to and encrypts the connection, but it does not prove that the code…

Glamsterdam follows the Fusaka upgrade, advancing Ethereum’s L1 scaling roadmap with enshrined proposer-builder separation, block-level access lists, and changes to gas pricing that better reflect the cost of execution and state growth. The Glamsterdam network upgrade is scheduled to activate on Sepolia at epoch 353,024, slot 11,296,768 (October 6, 2026, 13:53:36 UTC). See the activation table below for the deployment schedule. Hoodi and mainnet activation dates have not yet been decided. Sepolia-compatible client versions will be added to the client release tables as they are confirmed. Node operators must update both their execution and consensus layer clients before activation. Glamsterdam…

tl;dr: zkAPI lets you pay for a metered API without being known. Deposit credits into an Ethereum vault once, then authorize bounded usage with zero-knowledge proofs instead of an identity. The provider sees the requests, and the payment layer sees the spend. Neither learns the link between them. The Open Anonymity Project built it with the Ethereum Foundation, and it runs on Ethereum Mainnet today. The problem Every AI API call today carries an identity. Your API key points to an account, the account to a payment method, and every prompt you send joins the record attached to both. The…

The Ethereum Foundation’s Trillion Dollar Security initiative has identified blind signing and transaction uncertainty as a user experience risk, and is exploring native transaction assertions as a next step to enforce a transaction’s final outcome, alongside Clear Signing. This post covers why a valid signature doesn’t always guarantee the transaction result you wanted, how native transaction assertions could protect users where today’s defenses stop, and the design choices behind them, with EIP-7906 (Transaction Assertions via State Diff Opcode) as one possible approach. Two ways a signed transaction can go wrong The problem starts with how Ethereum works. It executes exactly…

Ethereum’s strength lies in its decentralization — not just technically, but socially and structurally. This blog articulates the EF’s vision, its role, and priorities as one of the ecosystem’s stewards. We use this moment as an opportunity to restate our vision, principles and values which we continue to uphold as we welcome the new management team. These priorities are not a rigid plan and are reflected in the strategies described by EF’s Co-EDs. By defining our approach and focus, we also aim to clarify where we direct our efforts — and where we intentionally step back — so that the…

Hi! This is Hsiao-Wei and Tomasz co-writing this blog post. We’ve now been in our new Co-Executive Director roles for almost a month. The honeymoon is over, it’s time to get moving. A Moment of Transition and Opportunity Ethereum has always been a journey: a constantly evolving ecosystem powered by people who believe in building a more open and decentralized world. While the Ethereum Foundation (EF) may be a decade old, it remains willing to reinvent itself. This year, EF embraced a new leadership model with dual Executive Directors. This design brings diverse and complementary perspectives, enhancing our ability to…

Ethereum’s weekly All Core Developer calls are a lot to keep up with, so this “Checkpoint” series aims for high-level updates roughly every 4-5 calls, depending on what’s happening in core development. See the previous update here. tl;dr: The past month centered on locking in the scope of the Fusaka upgrade and final Pectra deployment details. The Pectra upgrade ships on mainnet in just about a week, after which focus will shift to Fusaka testing and deciding what goes into the Glamsterdam upgrade (in other words, the ”scope” of the upgrade). A new All Core Developer (”ACD”) call structure will…

Are you part of a university blockchain club eager to dive deeper into the world of Ethereum? We want to connect with you! The Ethereum Foundation is sponsoring a global University Tour in partnership with BuidlGuidl, designed to activate student communities and grow the next generation of Ethereum builders. This tour includes: 🧑‍💻 Virtual sessions with Ethereum educators and builders🏫 In-person workshops on campuses across the globe🏆 A cross-university club competition, culminating in a live finals at Devconnect 2025 Whether your club is just getting started or already deeply embedded in the Ethereum ecosystem, this is your chance to: Plug…

Every year, the Ethereum ecosystem welcomes thousands of builders through community events, hackathons, courses, bootcamps, and campus clubs. However, many newcomers struggle to remain engaged, as they face challenges securing structured early-career opportunities. The Ethereum Season of Internships directly addresses this retention gap by creating a coordinated collection of internship opportunities across the ecosystem. What is the Ethereum Season of Internships? The Ethereum Season of Internships offers a coordinated collection of paid, fully remote summer internships across the Ethereum ecosystem. This initiative creates pathways for the next generation of contributors to connect with Ethereum projects and apply their diverse skills…

Thanks to Marius Van Der Wijden for creating the test case and statetest, and for helping the Besu team confirm the issue. Also, kudos to the Besu team, the EF security team, and Kevaundray Wedderburn. Additionally, thanks to Yuxiang Qiu, Justin Traglia, Marius Van Der Wijden, Benedikt Wagner, and Kevaundray Wedderburn for proofreading. If you have any other questions/comments, find me on twitter at @asanso tl;dr: Besu Ethereum execution client version 25.2.2 suffered from a consensus issue related to the EIP-196/EIP-197 precompiled contract handling for the elliptic curve alt_bn128 (a.k.a. bn254). The issue was fixed in release 25.3.0. Here is…