/**
 * Encodes an unicode string into an Uint8Array object as UTF-8
 *
 * @param {String} str String to be encoded
 * @return {Uint8Array} UTF-8 encoded typed array
 */
export declare const encode: (str: string, fromCharset?: string) => Uint8Array;
export declare const arr2str: (arr: Uint8Array) => string;
/**
 * Decodes a string from Uint8Array to an unicode string using specified encoding
 *
 * @param {Uint8Array} buf Binary data to be decoded
 * @param {String} Binary data is decoded into string using this charset
 * @return {String} Decoded string
 */
export declare function decode(buf: Uint8Array, fromCharset?: string): string;
/**
 * Convert a string from specific encoding to UTF-8 Uint8Array
 *
 * @param {String|Uint8Array} data Data to be encoded
 * @param {String} Source encoding for the string (optional for data of type String)
 * @return {Uint8Array} UTF-8 encoded typed array
 */
export declare const convert: (data: string | Uint8Array, fromCharset?: string | undefined) => Uint8Array;