import { OTP } from "./types/session";
import { OTPTransportIdentifier } from "./types/otp";
export declare class OTPManager {
    private encrypt;
    constructor();
    /**
     *
     * @param transportIdentifier OTPTransportIdentifier
     * @returns
     */
    generateOTP(transportIdentifier: OTPTransportIdentifier): Promise<{
        otp: string;
        expireTime: Date;
        key: string;
        otpID: string;
    }>;
    /**
     *
     * @param otpDetails
     * @returns
     */
    generateOTPKey(otpDetails: any): Promise<string>;
    validateOTP(OTP: string, key: string, identifier: OTPTransportIdentifier): Promise<boolean>;
    saveOTP(otp: OTP): Promise<void>;
    getOTP(otpID: string): Promise<OTP | undefined>;
    AddMinutesToDate(date: Date, minutes: number): Date;
    getOTPExpireTime(): Date;
}
export default OTPManager;