/**
 * Simulation clock: real time scaled into game time, plus the derived game-day counter.
 */
export declare const DEFAULT_TIME_SCALE = 24;
export declare const SECONDS_PER_GAME_DAY: number;
export declare function sanitizeGameTimeScale(timeScale?: number | null): number;
export declare function getScaledElapsedMs(createdAt: number, now: number, timeScale?: number | null): number;
export declare function getCurrentGameTimestamp(createdAt: number, now: number, timeScale?: number | null): number;
export declare function computeGameDay(createdAt: number, now?: number, timeScale?: number | null): number;