Ethereum Foundation warns some tools may break with Glamsterdam upgrade

cointelegraphPublished on 2026-08-18Last updated on 2026-08-18

Abstract

The Ethereum Foundation (EF) warns that the upcoming Glamsterdam upgrade, which introduces significant gas-model changes via EIP-8037, may cause some wallets, indexers, and gas estimators to break. Tools relying on a hardcoded maximum gas limit must be updated, as the changes separate state-gas costs for operations that create new state. While a standard ETH transfer to an existing account remains 21,000 gas, sending to a new account incurs an additional charge. Developers are urged to test their software on the Plataberget testnet. The upgrade also includes enshrined proposer-builder separation, block-level access lists, and increased contract and initialization-code size limits.

The Ethereum Foundation (EF) has warned that some wallets, indexers and gas estimators may break because of gas-model changes in the upcoming Glamsterdam upgrade.

On Monday, the EF’s Protocol DevOps team said any tool relying on a hardcoded maximum gas limit “will break” and must be updated. It urged developers to test their systems on Plataberget, a public testnet intended to operate for several months.

According to upgrade tracker Forkcast, Plataberget launched on Aug. 13. Meanwhile, the Glamsterdam fork is scheduled to activate on the network on Thursday, before its deployment on the Sepolia and Hoodi testnets.

The EF’s Protocol DevOps team said EIP-8037 would introduce a separate state-gas dimension for operations that create new state. Under the changes, a plain ETH transfer to an existing account would still cost 21,000 gas, while sending ETH to a new account would incur an additional state-gas charge.

The foundation said developers should revisit software that assumes 21,000 gas covers every ETH transfer or uses only one gas dimension when estimating transaction costs.

Glamsterdam also includes enshrined proposer-builder separation, block-level access lists and increased limits for contract and initialization-code sizes.

Related: Ethereum Foundation hits ‘Glamsterdam’ milestones, names new protocol leads

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Related Questions

QWhat is the main warning issued by the Ethereum Foundation regarding the Glamsterdam upgrade?

AThe Ethereum Foundation warned that some wallets, indexers, and gas estimators may break due to gas-model changes introduced in the upgrade, specifically any tools relying on a hardcoded maximum gas limit.

QWhat testnet did the EF recommend for developers to test their systems before the Glamsterdam upgrade?

AThe EF's Protocol DevOps team urged developers to test their systems on Plataberget, a public testnet intended to operate for several months.

QWhat key change does EIP-8037 introduce regarding gas costs?

AEIP-8037 introduces a separate state-gas dimension for operations that create new state. This means a plain ETH transfer to an existing account costs 21,000 gas, while sending ETH to a new account incurs an additional state-gas charge.

QWhich tools or software does the foundation specifically advise developers to revisit?

AThe foundation advises developers to revisit any software that assumes 21,000 gas covers every ETH transfer or uses only one gas dimension when estimating transaction costs.

QBesides gas-model changes, what are some other features included in the Glamsterdam upgrade?

AGlamsterdam also includes enshrined proposer-builder separation, block-level access lists, and increased limits for contract and initialization-code sizes.

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