Ethereum Foundation Warns: Glamsterdam Upgrade May Cause Some Wallets and Tools to Stop Working

The Ethereum Foundation (EF) has warned developers that upcoming gas model changes in the Glamsterdam upgrade may cause compatibility issues for some wallets, indexers, and gas estimation tools. The EF’s Protocol Development and Operations team stated that any tools relying on hard-coded maximum gas limits will be affected and require updates. The team advised developers to test relevant systems in advance on the Plataberget public testnet, which will run for several months to prepare for the Glamsterdam upgrade. According to upgrade tracking platform Forkcast, Plataberget launched on August 13, and the Glamsterdam fork is scheduled to activate on the network this Thursday, followed by deployments on the Sepolia and Hoodi testnets. This upgrade involves EIP-8037, which introduces an independent "state gas" dimension for operations that create new blockchain states. Post-upgrade, standard ETH transfers to existing accounts will still require 21,000 gas, but sending ETH to new accounts will incur additional state gas fees. The Ethereum Foundation noted that developers need to re-audit software that defaults to "all ETH transfers only cost 21,000 gas" or uses a single gas dimension to estimate transaction costs. In addition to gas model adjustments, Glamsterdam will also include native Proposer-Builder Separation (PBS), block-level access lists, and improvements such as increasing size limits for contracts and initialization code.