Module evm_version 

Detects the EVM version a node executes at a given block.

Replaying a transaction needs the spec its chain applied at that block. For chains without a hardfork schedule known to Foundry, header fields only hint at it, and replaying an old block under a newer spec can make a transaction succeed locally that failed on-chain because an opcode was not active yet. probe_evm_version instead asks the node which features it executes.

Constants

PROBES 🔒

Probed features in activation order, each paired with the EVM version that introduced it and runtime code that halts exceptionally unless the feature is active.

PROBE_CALL_GAS 🔒

Gas limit of the probe call, enough for the worst case in which every probe fails. Under EIP-8037 the six accounts the probe creates cost 1,101,600 state gas alone.

PROBE_GAS 🔒

Gas forwarded to each probe. A failing probe consumes all of it.

Functions

deploy_code 🔒

Returns initcode that deploys runtime.

evm_version_from_mask 🔒

Maps the probe result to the newest version whose probe and all earlier probes succeeded.

probe_code 🔒

Builds the creation code of the probe call.

probe_evm_version

Returns the newest EVM version whose features, and those of every earlier probed version, the node executes at block.