export declare class Timestamp {
    readonly seconds: number;
    readonly nanoseconds: number;
    constructor(seconds: number, nanoseconds: number);
    static now(): Timestamp;
    static fromDate(date: Date): Timestamp;
    static fromMillis(ms: number): Timestamp;
    toDate(): Date;
    toMillis(): number;
    toJSON(): {
        __type__: 'timestamp';
        seconds: number;
        nanoseconds: number;
    };
}