@hash

Compute the hash of a string with keccak256 (default) or sha256.

On-chain (@hash!): Hashes the decoded string or bytes a call returns, not its ABI envelope.

Returns: bytes32

Syntax

@hash(text algorithm?)

Arguments

Name	Type	Description
text	string	String to hash (e.g. a function signature)
[algorithm]	string	keccak256 (default) or sha256

Examples

# Compute a function selector
set $sel @hash("transfer(address,uint256)")

# Hash with sha256 instead of keccak256
set $digest @hash("an example" sha256)

See Also

• @namehash — ENS namehash
• @abi.encodeCall — encode a full function call

On-chain face (@hash!)

The digest of the decoded string/bytes return of a call, computed on-chain: keccak256 (default) through the Operators hash, sha256 through a rawCall to the SHA-256 precompile (0x02) with the digest unwrapped from the returned bytes envelope. Compare long strings or blobs against a precomputed digest of the payload bytes.