/**
 * @file Byte/string conversion helpers shared by every {@link TinyFSCore} backend.
 */
/**
 * Converts a byte array into a base64 string.
 *
 * @param {Uint8Array} bytes Source bytes.
 * @returns {string} The base64 representation.
 */
export declare const bytesToBase64: (bytes: Uint8Array) => string;
/**
 * Converts a base64 string into a byte array.
 *
 * @param {string} value Source string.
 * @returns {Uint8Array} The decoded bytes.
 */
export declare const base64ToBytes: (value: string) => Uint8Array;
/**
 * Converts a byte array into a lowercase hexadecimal string.
 *
 * @param {Uint8Array} bytes Source bytes.
 * @returns {string} The hexadecimal representation.
 */
export declare const bytesToHex: (bytes: Uint8Array) => string;
/**
 * Converts a hexadecimal string into a byte array.
 *
 * @param {string} value Source string.
 * @returns {Uint8Array} The decoded bytes.
 * @throws {TypeError} When the string length is odd.
 */
export declare const hexToBytes: (value: string) => Uint8Array;
/**
 * Decodes a byte array using the requested encoding.
 *
 * @param {Uint8Array} bytes Source bytes.
 * @param {string | null} encoding Target encoding, or `null` for binary.
 * @returns {string | Uint8Array} The decoded payload.
 */
export declare const decodeBytes: (bytes: Uint8Array, encoding: string | null) => string | Uint8Array;
/**
 * Converts supported input values into a byte array.
 *
 * @param {string | Uint8Array | ArrayBuffer | ArrayBufferView} data Source payload.
 * @param {string | null} encoding Encoding used when `data` is a string.
 * @returns {Uint8Array} The encoded bytes.
 * @throws {TypeError} When the payload type is not supported.
 */
export declare const toUint8Array: (data: string | Uint8Array | ArrayBuffer | ArrayBufferView, encoding: string | null) => Uint8Array;
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