export declare const conversionFns: {
    days: (amt: number) => number;
    hours: (amt: number) => number;
    minutes: (amt: number) => number;
    seconds: (amt: number) => number;
};
export declare const toSeconds: (amt: number, unit: keyof typeof conversionFns) => number;
export declare const unixTimeInSeconds: () => number;
export declare const calcExpiry: (duration: number) => number;
export declare const formatPeriods: (duration: string) => string | 0;