For smart-contract builders, a fixed gas allowance can be part of how a contract controls execution—not just how it pays transaction fees. A TechFlow report published on November 6, 2026, at 22:09:43 UTC+8 describes concerns that proposed Ethereum gas changes could break assumptions embedded in deployed contracts and supporting infrastructure.
According to the report, Ethereum’s All Core Developers (ACD) meeting agreed to pause the Hoodi testnet upgrade process while developers and security researchers investigate compatibility risks.
What the proposed changes would do
TechFlow identifies EIP-8037 and EIP-8038, intended for the Glamsterdam upgrade, as proposals to reprice state-related operations. State is the persistent data Ethereum maintains, including contract storage.
The report describes their goal as separating the charges for creating state from those for accessing it, and changing the gas costs assigned to particular opcodes—the instructions executed by the Ethereum Virtual Machine. The rationale is to better reflect the hardware costs of maintaining and reading Ethereum’s growing state.
For existing applications, the compatibility concern is that code may rely on execution costs remaining stable.
Where contract behavior could change
TechFlow attributes the findings to analysis by security firm ChainSecurity, which identified eight affected invariants: assumptions that software expects to remain true. The supplied article does not enumerate all eight, but highlights several patterns:
- Hard-coded gas limits for calls. Some contracts cap the gas passed to another contract to constrain execution or help guard against reentrancy. Higher execution costs could make previously successful calls run out of gas and revert.
- Error-handling logic. Code that catches failed calls may behave differently if the caller can no longer reliably anticipate the called contract’s gas consumption.
- Proxy gas forwarding. Proxies that forward a fixed proportion of available gas could take different execution paths after repricing.
The report warns that these changes could interrupt transaction flows or leave funds locked in incomplete contract states. These are reported compatibility risks, not evidence that those failures have already occurred.
Why Hoodi activation was deferred
According to TechFlow, developers agreed not to execute the Hoodi hard fork until they had mapped potentially affected contracts and provided compatibility guidance. The report identifies multisignature wallets, cross-chain bridges and decentralized lending protocols as areas where failures could propagate.
It also says the Ethereum Foundation issued a community self-check alert and coordinated audits with multiple organizations.
The review extends beyond contract code
TechFlow attributes to Ethereum researcher Marius van der Wijden an acknowledgment that official audits cannot cover every application dependency. Relevant logic can also sit in proprietary off-chain routing systems, settlement scripts and liquidation bots.
The report says the Foundation published a repository explaining the eight invariants, with problematic code examples and prompt templates for audit-assistance tools and code scanners. The supplied article does not include the repository’s URL.
As of the report’s publication, core developers and security organizations planned to review initial community findings at the following week’s ACD meeting and reassess Hoodi’s activation conditions and possible adjustments.
Original source: TechFlow, published November 6, 2026, at 22:09:43 UTC+8.