import { User, JSONWebToken, Questions, Answers } from '@digitalpersona/core';
import { IAuthService } from '@digitalpersona/services';
import { Authenticator } from '../../private';
/**
 * Security Questions authentication API.
 * Security Questions support only authentication. Identification is not supported.
 */
export declare class SecurityQuestionsAuth extends Authenticator {
    /** Constructs a new Security Questions authentication API object.
     * @param authService - an {@link AuthService|authentication service client} connected to the server.
     */
    constructor(authService: IAuthService);
    /** Reads a list of security questions enrolled by the user.
     * @param user - a user's name.
     * @returns a promise to return a list of enrolled questions.
     */
    getEnrolledQuestions(user: User): Promise<Questions>;
    /** Authenticates the user using user's answers to security questions.
     * @param identity - a {@link User |username} or a JSON Web Token.
     * @param answers - user's answers to security questions.
     * @returns a promise to return a JSON Web Token containing a claim (`crd`) showing the fact
     * a Security Questions were used.
     * Will reject if authentication fails.
     * @remarks
     * If the `identity` parameter is a user name, a new token will be created.
     * If the `identity` parameter is a JSON Web Token, an updated token will be returned.
     */
    authenticate(identity: User | JSONWebToken, answers: Answers): Promise<JSONWebToken>;
}