/**
 * Generates a random hex string of the specified length.
 * @param {number} [length=8] - The length of the hex string to generate. Default is `8`.
 * @param {boolean} [prefix=false] - If `true`, the hex string will be prefixed with `"0x"`. Default `false`.
 * @returns {string} A random hex string of the specified length.
 */
export declare const hex: (length?: number, prefix?: boolean) => string;