/**
 * * Computes the `MD5` digest of the given string using a pure JavaScript implementation.
 *
 * @remarks
 * - Pure JavaScript implementation — runs on any JS engine. Does not rely on `crypto` or **Web APIs** or other external libraries.
 * - Highly inspired by the algorithm used in {@link https://github.com/eustatos/pure-md5.git pure-md5} package.
 *
 * @param str - Input text to hash.
 *
 * @returns The `MD5` hash as a 32-character hex string.
 *
 * @example
 * const hash = md5("hello");
 * // → "5d41402abc4b2a76b9719d911017c592" *
 *
 * @example
 * // Used inside UUID v3
 * const digest = md5(namespace + name);
 */
export declare function md5(str: string): string;
/**
 * * Computes the `SHA-1` digest of the given string using a pure JavaScript implementation.
 *
 * @remarks Pure JavaScript implementation — runs on any JS engine. Does not rely on `crypto` or **Web APIs** or other external libraries.
 *
 * @param msg - Input text to hash.
 *
 * @returns The `SHA-1` hash as a 40-character hex string.
 *
 * @example
 * const hash = sha1("hello");
 * // → "aaf4c61ddcc5e8a2dabede0f3b482cd9aea9434d"
 *
 * @example
 * // Used inside UUID v5
 * const digest = sha1(namespace + name);
 */
export declare function sha1(msg: string): string;
/**
 * * Computes the `SHA-256` hash of a `UTF-8` string and returns it as a lowercase hexadecimal string.
 *
 * @param msg - The input string to hash. Can contain any `UTF-8` characters.
 * @returns A 64-character lowercase hexadecimal string representing the `SHA-256` hash.
 *
 * @remarks Pure JavaScript implementation — runs on any JS engine. Does not rely on `crypto` or **Web APIs** or other external libraries.
 *
 * @example
 * ```typescript
 * // Basic usage
 * const hash = sha256('hello');
 * // Returns: '2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824'
 *
 * // Empty string
 * const emptyHash = sha256('');
 * // Returns: 'e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855'
 *
 * // Unicode string
 * const unicodeHash = sha256('Hello পৃথিবী!');
 * // Returns: '7037e204b825b83553ba336a6ec35b796d505599286ae864729ed6cb33ae9fe1'
 * ```
 *
 * @see {@link https://toolbox.nazmul-nhb.dev/docs/utilities/hash/encoding#sha256bytes sha256Bytes} for hashing raw bytes
 * @see {@link https://toolbox.nazmul-nhb.dev/docs/utilities/hash/encoding#utf8tobytes utf8ToBytes} for converting string to bytes
 * @see {@link https://toolbox.nazmul-nhb.dev/docs/utilities/hash/encoding#bytestohex bytesToHex} for converting bytes to a hexadecimal string
 */
export declare function sha256(msg: string): string;