Ethereum warns Glamsterdam may break wallets and gas tools

The Ethereum Foundation warned that wallets, indexers and gas estimators could stop working when the Glamsterdam upgrade activates. The foundation pointed to EIP-8037, which adds a separate state-gas charge for operations that create new accounts. Developers were urged to update software and test on the public Plataberget testnet.

The foundation’s Protocol DevOps team warned any tool relying on a hardcoded maximum gas limit “will break” and must be changed. Plataberget launched on Aug. 13 and is expected to run for several months as the primary testing environment. Glamsterdam is scheduled to activate on the mainnet on Thursday, with subsequent deployments to the Sepolia and Hoodi testnets.

EIP-8037 introduces a second gas dimension that charges specifically for creating new on-chain state. A plain ETH transfer to an existing account will remain 21,000 gas, but sending ETH to a new account will incur an additional state-gas charge on top of the base cost. The foundation advised developers to stop assuming a single gas figure covers every ETH transfer.

The change affects multiple kinds of tooling. Wallets that display fee estimates may underprice transactions that create new accounts. Gas estimators that use a single gas value could give incorrect suggestions. Indexers or validators that enforce fixed maximums may fail to parse or accept blocks that include the new charges. Any component that hardcodes limits or merges fee dimensions without accounting for state-gas will need updates before Glamsterdam activates.

Glamsterdam also bundles other protocol changes: enshrined proposer-builder separation, block-level access lists designed to optimize gas accounting for certain operations, and higher limits for contract size and initialization-code size. Together, these changes alter how gas is measured, charged and limited across several transaction and contract types.

The foundation recommended thorough testing on Plataberget to identify assumptions that break and to update fee estimation, transaction construction and validation components so they handle two gas dimensions and do not assume a single uniform gas cap.

Gas is Ethereum’s unit for measuring computation and storage costs. The separate state-gas dimension is intended to price the resource cost of adding new state more accurately and to limit uncontrolled growth in stored state.