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Ethereum developers warned that the Glamsterdam upgrade’s gas repricing could break a small number of Layer 1 smart contracts, though most applications should remain unaffected. The changes, driven by EIP-8037 and EIP-8038, will raise and standardize costs for creating and accessing blockchain state. Researchers replayed historical mainnet transactions under the proposed schedule and found that while most produced identical outcomes, some contracts required higher gas limits and a smaller group failed even with substantially increased limits. Contracts using Solidity’s 2,300-gas stipend, hardcoded call limits, or gasleft() logic face the greatest compatibility risks. Wallets, RPC providers, and node tools must also update gas-estimation systems to reflect the revised rules. Developers can test fixes on the Platåberget testnet before public testnet deployments and eventual mainnet activation targeted for Q4 2026.
Key Elements
Ethereum developers have issued a warning that a small number of Layer 1 smart contracts could malfunction when the network’s Glamsterdam upgrade introduces sweeping changes to gas pricing later this year. The Ethereum Foundation said the repricing, driven by two Ethereum Improvement Proposals, will alter how much it costs to create and access state on the blockchain, potentially invalidating hardcoded assumptions baked into some deployed contracts.
The changes stem from EIP-8037 and EIP-8038, which aim to make gas prices more accurately reflect the computational res and standardizes costs for creating new state elements, including accounts, storage slots, and deployed contract bytecode. EIP-8038 raises costs for accessing existing state, covering operations such as SLOAD, SSTORE, cold account access, EXTCODESIZE, and EXTCODECOPY
Ethereum last adjusted state-operation pricing during the Berlin upgrade in 2021. Since then, the network’s state has expanded significantly as applications stored more information on-chain, while validators have supported higher block gas limits. The Foundation said repricing resource-heavy operations is a necessary step before the network can safely raise capacity further. The new schedule is designed around a performance target that could support roughly three times the current base throughput.
Replaying History to Find Breakage
To gauge the impact, researchers replayed historical mainnet transactions under the proposed Glamsterdam pricing schedule. Most transactions produced identical outcomes, while some required different gas limits under the new rules. The Foundation sorted results into four categories: unchanged transactions, successful transactions with different gas usage, failures fixable through higher limits, and potentially broken transactions.
A small group of contracts continued to fail even after researchers substantially raised the supplied gas. These contracts often rely on fixed gas assumptions within their code, such as hardcoded call limits, logic based on gasleft(), or presigned transactions with fixed limits. The Foundation identified Solidity’s historical 2,300-gas stipend for transfer and send operations as a particular risk factor. Operations that previously completed within that allowance may consume more gas under the new state-access schedule.
The Foundation has not publicly identified every affected application but said direct outreach to the most affected builders is already underway. It described the potentially broken group as small.
Beyond Smart Contracts
The warning extends beyond deployed contracts. Wallets, RPC providers, indexers, and node tools must update their gas-estimation systems to recognize the revised cost rules. Software using cached constants could underestimate the gas needed for a transaction and cause it to fail. Both proposals require tools using eth_estimateGas and related functions to account for the revised state costs.
The upgrade could also disrupt wallets and gas tools that assume ordinary transfers always require 21,000 gas. Transfers to existing accounts retain that figure, while transfers creating new accounts will incur an additional state charge. Regular users do not need to make manual changes, according to the Foundation, because updated wallet and infrastructure providers should apply the necessary gas estimates automatically.
Testing on Platåberget
Developers can test fixes on the Platåberget testnet, also known as glam-devnet-8, which already runs the new repricing schedule. The network was launched to provide a long-running environment for Glamsterdam testing. Contract maintainers can enter an address into Ethereum’s checker tool to identify historical transactions that diverge under the proposed rules. Developers should raise supplied gas limits when that resolves the issue or review individual call sites when failures persist.
The next stage will involve additional devnet testing, followed by forks on Sepolia and Hoodi. Ethereum’s roadmap targets Glamsterdam for Q4 2026, but developers have not announced a fixed mainnet activation date. The final schedule depends on stable client implementations and successful public-testnet deployments.
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Source: finance.biggo.com