/**
 * Withdrawal Date Utilities
 *
 * Mirrors TimelockedVault.sol's DateUtils logic for computing claimable dates.
 * All operations are in UTC to match contract behavior.
 */
export interface ClaimableDate {
    year: number;
    month: number;
    day: number;
    epoch: number;
}
/**
 * Compute the claimable date for a withdrawal request.
 * Replicates TimelockedVault.requestRedeem() logic exactly.
 *
 * The contract does:
 *   (year, month, day) = DateUtils.timestampToDate(block.timestamp + 300 + lagDuration)
 *
 * @param requestTimestamp - Block timestamp of the request (in seconds, UTC)
 * @param lagDuration - Lag duration in seconds (e.g., 86400 for 1 day)
 * @returns The date when the withdrawal becomes claimable (UTC)
 */
export declare function computeClaimableDate(requestTimestamp: number, lagDuration: number): ClaimableDate;
/**
 * Check if a withdrawal request is ready to claim.
 * The contract allows claiming when: block.timestamp + 300 >= claimableEpoch
 *
 * @param claimableEpoch - The epoch when this request became claimable
 * @param currentEpoch - Current timestamp (usually block.timestamp or now)
 * @returns true if claimable now
 */
export declare function isClaimableNow(claimableEpoch: number, currentEpoch: number): boolean;
/**
 * Format date for use as a lookup key (e.g., "2024-03-16")
 * Ensures consistent formatting across the codebase.
 */
export declare function formatDateKey(year: number, month: number, day: number): string;
/**
 * Verify that computed date matches expected format.
 * Used for debugging and validation.
 */
export declare function isValidClaimableDate(date: ClaimableDate): boolean;
/**
 * Get the number of days in a given month.
 * @param year - Year (4-digit)
 * @param month - Month (1-12)
 * @returns Number of days in that month
 */
export declare function getDaysInMonth(year: number, month: number): number;