Glamsterdam

Ethereum

2026-09-29 08:52:42

Ethereum Foundation sets Glamsterdam upgrade for Sepolia on Oct. 6

The Ethereum Foundation said the Glamsterdam network upgrade will go live on the Sepolia testnet at 21:53:36 Beijing time on Oct. 6, 2026, at epoch 353,024 and slot 11,296,768. The upgrade combines the Amsterdam execution-layer changes with the Gloas consensus-layer changes. Its headline items include enshrined proposer-builder separation, or ePBS, under EIP-7732; block-level access lists, or BALs, under EIP-7928; and gas pricing changes tied to EIP-8037, EIP-8038 and related proposals to better reflect execution costs and state growth. The Foundation said activation dates for Hoodi and Ethereum mainnet have not been set. It also said node operators need to update both execution-layer and consensus-layer clients before activation, while mainnet users and ETH holders do not need to take any action for now. Client releases are being published, and the full compatibility list is available in the official announcement.

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Ethereum

2026-09-27 14:31:28

Ethereum’s Glamsterdam upgrade enters final stage with key date expected in October

Ethereum’s Glamsterdam upgrade has moved into its final stage, with the key implementation date expected in October, according to Techub News, which cited U.Today. The update is described as a major network upgrade following Dencun. Based on the source summary, the stated goal is to keep improving Ethereum’s network performance while reducing costs. No additional rollout details, technical specifications, or exact implementation date were disclosed in the provided digest. The report frames Glamsterdam as the next notable step in Ethereum’s upgrade path after Dencun, with October now the main timing marker mentioned in the source.

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Ethereum

2026-09-26 00:20:00

Vitalik says Ethereum nodes can now sync in half a day with disk use below 0.5TB

Ethereum co-founder Vitalik Buterin said in a post on X that Ethereum nodes can now complete synchronization in half a day, and that disk usage can be kept below 0.5TB under a more aggressive configuration. He said the improvement in node usability has come from EIP-4444 and continued optimization of Snap Sync by client teams, with the upcoming Glamsterdam upgrade expected to improve sync efficiency further. Buterin also pointed to practical limits around using local infrastructure. Users can direct a wallet RPC to a local node, he said, but only if the node’s RPC functions are configured properly. Even then, some browser-based dApps may not work well with a local RPC, while other applications hardcode RPC connections to their own servers. On his own workflow, Buterin said he has become more inclined to avoid browser dApps and use command-line tools instead. He added that he has already updated ENS records through a Python script connected to a local node. He also said kohaku-cli is set to integrate privacy protocols further, and that early development work is already underway.

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Optimism

2026-09-20 03:20:40

Optimism flags op-batcher v1.17.0 as required upgrade for OP Stack chains

Optimism has released op-batcher v1.17.0 and labeled it a required upgrade for operators running batcher infrastructure on OP Stack chains. The release adds compatibility with Ethereum’s Glamsterdam upgrade, includes security updates, and introduces configurable limits for alternative data availability. The batcher is a core part of rollup infrastructure because it collects Layer 2 transaction data and submits it to Layer 1. If that component falls behind protocol requirements, a chain’s ability to publish transaction data could be affected. The update is part of broader work to keep OP Stack components, including the sequencer, batcher, and proposer, aligned with Ethereum’s roadmap. For end users, the change is expected to be largely invisible, while infrastructure teams are expected to complete the upgrade as required. The item was carried by Techub News and cited Bitcoinist.

320

Ethereum

2026-09-20 02:18:07

Ethereum sets Glamsterdam Sepolia test for Oct. 6 as developers warn fake builders could stall the chain

Ethereum core developers have scheduled the first public test of the Glamsterdam upgrade on the Sepolia testnet for Oct. 6, with the Hoodi testnet tentatively set to follow on Oct. 27. Alongside the timeline, developers flagged a specific weakness tied to the economics of free testnets: an attacker using multiple fake identities and free Sepolia ETH could repeatedly win block auctions with outsized bids and then fail to deliver the required payload data. That could interrupt block production and make it harder to tell whether problems seen during testing come from the upgrade itself or from malicious interference. According to comments made during Thursday’s core developer call, consensus-layer developer Potuz said someone could spin up large numbers of builders, rotate identities, submit extremely high bids, and provide no payload at all. Developers stressed that such an attack would not put Ethereum mainnet funds or transactions at risk, because the issue is specific to Sepolia’s free and easily sybiled environment. The concern is operational rather than financial: stalled tests, missing payloads, and a compressed release window could slow infrastructure validation and leave the upgrade further away from mainnet readiness.

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Ethereum

2026-09-18 09:50:52

Ethereum sets Glamsterdam testnet fork for Oct. 6, 2026, with no mainnet date yet

Ethereum core developers have set the first concrete date for the network’s next upgrade cycle, Glamsterdam, with the Sepolia testnet scheduled to fork on Oct. 6, 2026 at 13:53:36 UTC. The deployment table in the core developers’ coordination repository lists the activation point at epoch 353024 and starting slot 11296768. In the same document, the Hoodi testnet and mainnet fields remain marked as pending, and the repository’s mainnet upgrade and incident response plan is still an unfilled template. The upgrade name combines Gloas on the consensus layer and Amsterdam on the execution layer. One issue raised during the core developers’ meeting concerns the economics of testing Ethereum’s in-protocol proposer-builder separation, or ePBS. According to CoinDesk’s report on the meeting, consensus-layer developer Potuz warned that an attacker could spin up 1,000 builders, bid aggressively in rotation, and then fail to deliver payloads. Because Sepolia uses free test ETH rather than assets with real cost, developers said the attack could be much cheaper to execute there than on mainnet. CoinDesk also reported that client teams need to ship Sepolia-ready software by Sept. 29, leaving roughly seven days before the fork.

380

Ethereum

2026-09-18 00:14:15

Ethereum’s Glamsterdam completes Devnet-11 rehearsal with proposed block gas cap raised to 200 million

Ethereum’s planned Glamsterdam upgrade completed a rehearsal on Devnet-11 this week, where blocks were successfully confirmed under a new block-building rule set. The proposal would raise the block gas limit from 60 million to 200 million and add block-level access lists, a change designed to let nodes fetch data in parallel and validate unrelated transactions at the same time. The tradeoff is longer block data propagation, which is expected to increase from about 2 seconds to 9 seconds to accommodate larger blocks. In testing, the Nethermind execution client passed all 2,302 performance tests and processed 570.7 billion gas in 3 minutes and 15 seconds. Developers are targeting a Sepolia testnet deployment on Oct. 6, though the exact timing has not been finalized. The 200 million gas ceiling remains experimental and has not yet gone through adversarial stress testing.

340

Ethereum

2026-09-18 05:23:29

Ethereum Sets Glamsterdam Test Dates, Warns Fake Builders Could Jam Sepolia

Ethereum developers have set Oct. 6 for the public Sepolia test of the network’s upcoming Glamsterdam upgrade, but the date was confirmed alongside a blunt warning: attackers using free test ether and disposable builder identities could repeatedly win block auctions and then refuse to deliver transaction payloads. Developers said the issue would not put mainnet funds at risk because the attack targets Sepolia, where test ether carries no meaningful cost. The bigger concern is that missing payloads could freeze traffic on the test network and distort the infrastructure testing needed before the upgrade can move closer to mainnet. The warning was raised during Thursday’s core developer call, where consensus developer Potuz said an attacker could spin up large numbers of builders, rotate identities, bid aggressively and then fail to produce payloads. Glamsterdam is designed to let Ethereum fit more activity into each block while keeping verification manageable, with changes aimed at supporting a block gas limit of about 200 million. Client teams now have until Sept. 29 to ship Sepolia-ready software, leaving only seven days before the fork instead of the usual 14-day review window. A Hoodi public test is tentatively planned for Oct. 27, while a mainnet activation date has not been set.

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