export declare function generateZeusHash(timestamp: string): Promise<string>;
export declare function unixToZeus(unixTime: number): string;
export declare function zeusToUnix(zeusTime: string): number;
/**
 * Ensures a timestamp is in ISO format for hashing.
 * Accepts Date objects, ISO strings, or UNIX timestamps.
 * @param input - Any time format.
 * @returns ISO timestamp string.
 */
export declare function normalizeTimestamp(input: string | number | Date): string;
/**
 * Ensures a given input is a valid UNIX timestamp.
 * @param timestamp - UNIX timestamp in seconds.
 * @returns True if valid, otherwise false.
 */
export declare function isValidUnixTimestamp(timestamp: number): boolean;
/**
 * Checks if a string is a valid BLAKE3 hash (64-char hex).
 * @param hash - Hash to validate.
 * @returns True if valid, otherwise false.
 */
export declare function isValidZeusHash(hash: string): boolean;
/**
 * Logs messages in a formatted manner.
 * @param message - The message to log.
 * @param level - Log level: "info", "warn", "error".
 */
export declare function log(message: string, level?: "info" | "warn" | "error"): void;
/**
 * Converts a UNIX timestamp to a human-readable string.
 * @param unixTime - UNIX timestamp in seconds.
 * @returns Formatted date string.
 */
export declare function unixToHuman(unixTime: number): string;
/**
 * Syncs local system time with an external NTP server.
 * @returns Promise<Date> - Synchronized time.
 */
export declare function syncWithNTP(): Promise<Date>;