import type { ErrorType } from '../../errors/utils.js' import { type StringToBytesErrorType, stringToBytes, } from '../encoding/toBytes.js' import { type BytesToHexErrorType, bytesToHex } from '../encoding/toHex.js' import { type Keccak256ErrorType, keccak256 } from '../hash/keccak256.js' import { type EncodedLabelToLabelhashErrorType, encodedLabelToLabelhash, } from './encodedLabelToLabelhash.js' export type LabelhashErrorType = | BytesToHexErrorType | EncodedLabelToLabelhashErrorType | Keccak256ErrorType | StringToBytesErrorType | ErrorType /** * @description Hashes ENS label * * - Since ENS labels prohibit certain forbidden characters (e.g. underscore) and have other validation rules, you likely want to [normalize ENS labels](https://docs.ens.domains/contract-api-reference/name-processing#normalising-names) with [UTS-46 normalization](https://unicode.org/reports/tr46) before passing them to `labelhash`. You can use the built-in [`normalize`](https://viem.sh/docs/ens/utilities/normalize) function for this. * * @example * labelhash('eth') * '0x4f5b812789fc606be1b3b16908db13fc7a9adf7ca72641f84d75b47069d3d7f0' */ export function labelhash(label: string) { const result = new Uint8Array(32).fill(0) if (!label) return bytesToHex(result) return encodedLabelToLabelhash(label) || keccak256(stringToBytes(label)) }