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Ethereum developers warn of smart contract risks in Glamsterdam upgrade

Ethereum developers warn of smart contract risks in Glamsterdam upgrade

The proposed changes represent the most significant adjustment to state-operation pricing since the 2021 Berlin upgrade. By repricing resource-heavy operations like SLOAD, SSTORE, and account access, developers aim to curb blockchain-state growth and prepare the network for a threefold increase in base throughput. While the Ethereum Foundation reports that most contracts remain unaffected, those relying on fixed gas stipends, hardcoded call limits, or gasleft logic are at risk of failure.

Contracts utilizing the historical 2,300-gas allowance through send or transfer functions are particularly vulnerable, as these operations may exceed their limits under the new cost schedule. Beyond smart contracts, the update necessitates revisions for wallets, RPC providers, and indexers. Tools relying on cached constants or fixed gas estimates for transfers—such as the standard 21,000 gas assumption—must be updated to account for new state charges. Developers are currently testing these changes on the Platåberget testnet and have begun direct outreach to builders of the most affected applications. Maintainers are advised to utilize the Foundation's provided checker to identify historical transactions that diverge under the new pricing model.

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