/**
 * Utility functions for encoding and decoding data
 */
/**
 * Convert a hex string to Uint8Array
 * @param hex Hex string to convert
 * @returns Uint8Array of bytes
 */
export declare function hexToBytes(hex: string): Uint8Array;
/**
 * Convert Uint8Array to hex string
 * @param bytes Uint8Array to convert
 * @returns Hex string
 */
export declare function bytesToHex(bytes: Uint8Array): string;
/**
 * Convert a UTF-8 string to Uint8Array
 * @param str UTF-8 string to convert
 * @returns Uint8Array of bytes
 */
export declare function utf8ToBytes(str: string): Uint8Array;
/**
 * Convert Uint8Array to UTF-8 string
 * @param bytes Uint8Array to convert
 * @returns UTF-8 string
 */
export declare function bytesToUtf8(bytes: Uint8Array): string;
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