/// <reference types="express" />
import { AuthenticationMetadata, AuthenticationStrategy, TokenService } from '@loopback/authentication';
import { Request } from '@loopback/rest';
import { TwoFactorService } from './two-factor.service';
import { BaseUser, BaseUserProfile } from '../models';
import { BaseUserRepository } from '../repositories';
/**
 * The jwt authentication strategy.
 */
export declare class JwtAuthenticationStrategy implements AuthenticationStrategy {
    private readonly accessTokenService;
    private readonly metadataArray;
    private readonly baseUserRepository;
    private readonly forceTwoFactor;
    private readonly forceTwoFactorAllowedRoutes;
    private readonly twoFactorService;
    readonly name: string;
    constructor(accessTokenService: TokenService, metadataArray: AuthenticationMetadata[], baseUserRepository: BaseUserRepository<string>, forceTwoFactor: boolean, forceTwoFactorAllowedRoutes: string[], twoFactorService: TwoFactorService<string>);
    authenticate(request: Request): Promise<BaseUserProfile<string> | undefined>;
    /**
     * Checks if the request requires 2fa and validates accordingly.
     * @param user - The currently logged in user.
     * @param request - The request, is used to extract the two factor code from the custom header.
     */
    protected validate2FA(user: BaseUser<string>, request: Request): Promise<void>;
    /**
     * Extracts the token from the given request.
     * @param request - The request to get the token from.
     * @returns The found token. An error otherwise.
     * @throws An Http-Unauthorized-Error when no token could be found.
     */
    protected extractTokenFromRequest(request: Request): string;
}