export declare abstract class Duration {
    abstract plus(other: Duration): Duration;
    abstract minus(other: Duration): Duration;
    abstract times(x: number): Duration;
    abstract divide_by(x: number): Duration;
    abstract as_ns(): number;
    abstract as_s(): number;
    abstract toString(): string;
    abstract equal(other: Duration): boolean;
}
export declare class Nanoseconds extends Duration {
    private readonly ns;
    constructor(ns: number);
    static make_of(x: number | Nanoseconds | Seconds): Nanoseconds;
    plus(other: Duration): Nanoseconds;
    minus(other: Duration): Nanoseconds;
    times(x: number): Nanoseconds;
    divide_by(x: number): Nanoseconds;
    as_ns(): number;
    as_s(): number;
    toString(): string;
    equal(other: Duration): boolean;
}
export declare class Seconds extends Duration {
    private readonly s;
    constructor(s: number);
    static make_of(x: number | Nanoseconds | Seconds): Nanoseconds;
    plus(other: Duration): Nanoseconds;
    minus(other: Duration): Nanoseconds;
    times(x: number): Nanoseconds;
    divide_by(x: number): Nanoseconds;
    as_ns(): number;
    as_s(): number;
    toString(): string;
    equal(other: Duration): boolean;
}
export declare class Timestamp {
    private readonly data;
    private static readonly MAX_SAFE_SECONDS;
    constructor(data: number | string);
    nanoseconds(): number;
    seconds(): number;
    private parts;
    /** a.distance_from(b) = a - b */
    distance_from(other: Timestamp): Duration;
    /** a.distance_to(b) = b - a */
    distance_to(other: Timestamp): Duration;
    plus(d: Duration): Timestamp;
    minus(d: Duration): Timestamp;
    toString(): string;
    toNumber(): number;
    /** compares timestamps to single-ns precision if both are string-typed,
        otherwise up to floating-point accuracy (~200ns for timestamps around the year 2020) */
    equal(other: Timestamp): boolean;
}