import { BytesLike } from '../types/UtilsTypes.js';
export declare function byte2hexStr(byte: number): string;
export declare function bytesToString(arr: BytesLike): string;
export declare function hextoString(hex: string): string;
export declare function byteArray2hexStr(byteArray: BytesLike): string;
export declare function base64DecodeFromString(string64: string): number[];
export declare function base64EncodeToString(bytes: BytesLike): string;