import { FrequencyType } from './types';
/**
 * Interface for savings calculation parameters
 */
export interface SavingsCalculationParams {
    savingsTarget: number;
    selectedFrequency: FrequencyType;
    startDate: Date;
    endDate: Date;
    annualInterestRate: number;
    isInterestDisabled?: boolean;
    currentBalance?: number;
}
/**
 * Interface for periodic amount calculation parameters
 */
export interface PeriodicAmountParams {
    periodicAmount: number;
    selectedFrequency: FrequencyType;
    startDate: Date;
    endDate: Date;
    annualInterestRate: number;
    isInterestDisabled?: boolean;
    currentBalance?: number;
}
/**
 * Calculate final balance with compound interest
 * Interest accrues daily but compounds monthly (on the 1st of each month)
 */
export declare const calculateFinalBalanceWithCompoundInterest: (params: PeriodicAmountParams) => number;
/**
 * Calculate total interest earned over the savings period
 */
export declare const calculateProjectedInterestEarnings: (params: PeriodicAmountParams) => number;
/**
 * Calculate the required periodic amount to reach a savings target, considering compound interest
 * Uses binary search to find the optimal periodic amount
 */
export declare const calculateRequiredPeriodicAmountWithInterest: (params: SavingsCalculationParams) => number;
/**
 * Simple calculation without interest (for backward compatibility)
 */
export declare const calculateRequiredPeriodicAmountSimple: (params: Omit<SavingsCalculationParams, 'annualInterestRate' | 'isInterestDisabled'>) => number;