assertions:assert-codehash

Assert an address has a specific code hash, on-chain.

Syntax

assertions:assert-codehash <target> <expected> [message]

Arguments

Name	Type	Description
target	address	Address to check
expected	bytes32	Expected code hash (keccak256 of the runtime bytecode)
[message]	string	Revert message when the assertion fails

Examples

load assertions [@codehash]

# Pin an implementation by its runtime code hash
assertions:assert-codehash 0x9C58BAcC331c9aa871AFD802DB6379a98e80CEdb @codehash(0xf8D1677c8a0c961938bf2f9aDc3F3CFDA759A9d9) "implementation changed"

See Also