import { CrudeTimeSpan, TimeSpan, TimeStamp } from './telem';
/**
 * Calculates and tracks clock skew between two systems using a midpoint
 * synchronization algorithm. Useful for distributed systems where clock
 * synchronization is critical.
 */
export declare class ClockSkewCalculator {
    private readonly now;
    private localStartT;
    private lastSkew;
    constructor(now?: () => TimeStamp);
    start(): void;
    end(remoteMidpointT: TimeStamp): void;
    get skew(): TimeSpan;
    exceeds(threshold: CrudeTimeSpan): boolean;
}
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