export declare function legacyUnixToZeus(unixTime: number): string;
export declare function legacyZeusToUnix(zeusTime: string): number;
/**
 * Converts a UNIX timestamp to ZEUS time format.
 * Ensures backward compatibility.
 */
export declare function convertUnixToZeus(unixTime: number, useLegacy?: boolean): Promise<string>;
/**
 * Converts a ZEUS timestamp back to UNIX epoch time (if possible).
 */
export declare function convertZeusToUnix(zeusHash: string): number | null;