/**
 * Result object for FD (Fixed Deposit) calculation.
 * @interface FDResult
 * @property maturityAmount Final amount at maturity
 * @property interestEarned Total interest earned
 */
export interface FDResult {
    maturityAmount: number;
    interestEarned: number;
}
/**
 * Calculate Fixed Deposit (FD) maturity amount.
 *
 * Calculates the maturity amount and interest earned on a fixed deposit
 * investment using compound interest formula.
 *
 * @param principal Initial deposit amount
 * @param annualRate Annual interest rate (in %)
 * @param years Deposit period in years
 * @returns FDResult object containing maturityAmount and interestEarned
 *
 * @example
 * // Calculate FD maturity for 100000 at 7% for 5 years
 * calculateFD(100000, 7, 5);
 * // => { maturityAmount: 140255, interestEarned: 40255 }
 */
export declare function calculateFD(principal: number, annualRate: number, years: number): FDResult;