Ethereum's Glamsterdam Upgrade Risks Breaking Smart Contracts
Ethereum (ETH)
Editor:
Eugene Serbin
Cvj.ai reports that Ethereum’s upcoming Glamsterdam upgrade aims to triple base-layer throughput by repricing gas, but new proposals could break millions of existing smart contracts. The Ethereum Foundation’s plan introduces higher state-creation costs, forcing developers to adapt before the 2026 mainnet deployment. The upgrade targets the fourth quarter of 2026, with EIP-8037 and EIP-8038 currently in formal Review status.
EIP-8037 proposes a common cost of 1,530 gas for every byte of new state to manage growth. Creating a new account jumps from 25,000 to 183,600 gas, while deploying 24 KiB of code plus a new account rises from 4,947,200 to 37,784,880 gas. Replay testing of 929,731,274 transactions revealed that 2,687,652 transactions fell into the ‘potentially broken’ group under EIP-8037.
These failures involve fixed 2,300-gas stipends, hardcoded gas forwarded to internal calls, and logic branching on gasleft(). High-risk areas include versions of the eth-infinitism ERC-4337 EntryPoint and stacks like ZeroDev and Alchemy. Immutable contracts pose the toughest challenges, often requiring new implementations and user migration.
Developers must resimulate transactions and update wallets, RPC providers, and indexers to incorporate the new rules. Regular users may see minimal impact if infrastructure updates correctly, though sending value to a new account adds a runtime state-creation charge.
How the market reacted
Whalio's own Binance spot order flow for ETH, measured when this story was written up on 28 August 2026. Not the outlet's figures.
ETH is trading at $2,510.94 with a 1-hour buy ratio of 57.3%, indicating short-term buying pressure. However, the 4-hour buy ratio drops to 47.1%, suggesting that this momentum is fading over a slightly longer timeframe. The 24-hour buy ratio sits at 48.6%, showing a near-even split between buyers and sellers over the last day. Volume delta in the last hour was positive at +$2,612,308, but the 4-hour delta is negative at -$6,006,244. This means that while recent trades have been net buying, the broader recent trend has been net selling. The 24-hour volume delta is -$22,699,506, with a CVD of -$20,445,467, confirming that sellers have dominated the day's volume.
The latest daily buy ratio of 46.8% sits at the 16th percentile of the last 322 days, against a median of 49.5% - weaker buying than most days.
Twenty-four hours later
What ETH did over the 24 hours after the story broke. The market moves for its own reasons; this is what happened, not what the story caused.
Was that an ordinary day?
The same Binance spot measurements for ETH, averaged over the days leading up to the story.
Over the preceding week, the 7-day average buy ratio was 51.3%, making today’s 24-hour ratio of 48.6% slightly below average by 2.6 points. Volume was 0.74x the average, indicating a quieter trading day than usual. Despite lower volume, the price changed +7.9% over 8 days, with a total volume delta of +$248,748,632. There were 6 days of net buying out of 7 in the past week. This suggests that while today is an unusual day for volume and buying ratio, the broader weekly trend remains bullish.