/**
 * Converts a string into a Uint8Array.
 *
 * This function takes a string input and uses the `Uint8Array` API to encode it into a
 * Uint8Array, which is suitable for binary operations like encryption.
 * @param {string} str - The string to be converted into a Uint8Array.
 * @returns {Uint8Array} - The encoded Uint8Array representation of the input string.
 */
declare function stringToUint8Array(str: string): Uint8Array;
/**
 * Generates a 32-byte key by hashing the input string.
 *
 * This function uses the SHAKE256 hash function to generate a 128-bit (32-byte) key
 * from the given input string. SHAKE256 is a cryptographic hash function that produces
 * variable-length output.
 * @param {string} input - The input string to be hashed into a 32-byte key.
 * @returns {string} - A 32-byte hash of the input string, suitable for use as an encryption key.
 */
declare function generate32ByteKey(input: string): string;
/**
 * Generates a 12-byte nonce by hashing the input string.
 *
 * This function uses the SHAKE256 hash function to generate a 48-bit (12-byte) nonce
 * from the given input string. The nonce is used as an initialization vector in encryption.
 * @param {string} input - The input string to be hashed into a 12-byte nonce.
 * @returns {string} - A 12-byte hash of the input string, suitable for use as a nonce.
 */
declare function generate12ByteNonce(input: string): string;

export { generate12ByteNonce, generate32ByteKey, stringToUint8Array };