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export declare const CURRENT_EXPIRY_UNIX_TIMESTAMP: number;
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interface IERS_LEAP_SECONDS_NTP {
    /**
     *
     *
     * The ntp timestamp is the number of seconds since 1st Jan 1900 as defined by the
     * International Earth Rotation and Reference Systems Service (IERS) when the
     * leap second was added to the UTC time scale.
     *
     */
    ntp: number;
    /**
     *
     *
     * The corresponding Unix timestamp is the number of seconds since 1st Jan 1970
     * when the leap second was added to the UTC time scale.
     *
     *
     */
    unix: number;
    /**
     *
     *
     * DTAI is the difference between TAI and UTC, and is the number of seconds that
     * the UTC time scale is ahead of TAI.
     *
     */
    dtai: number;
    /**
     *
     *
     * The date and time when the leap second was added to the UTC time scale as a
     * JavaScript Date object.
     *
     */
    when: Date;
}
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export declare const LEAP_SECONDS: IERS_LEAP_SECONDS_NTP[];
export {};
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