/**
 * Generates random base58 string
 *
 * Note: `$` is used to indicate that this function is not a pure function - it is not deterministic
 * Note: This function is cryptographically secure (it uses crypto.randomBytes internally)
 *
 * @param length - length of the string
 * @returns secure random base58 string
 *
 * @private internal helper function
 */
export declare function $randomBase58(length: number): string;