export interface ClaimableDate {
    year: number;
    month: number;
    day: number;
    epoch: number;
}
export declare function computeClaimableDate(requestTimestamp: number, lagDuration: number): ClaimableDate;
export declare function isClaimableNow(claimableEpoch: number, currentEpoch: number): boolean;
export declare function formatDateKey(year: number, month: number, day: number): string;
export declare function isValidClaimableDate(date: ClaimableDate): boolean;
export declare function getDaysInMonth(year: number, month: number): number;