import { StorageService } from './storage.service';
import { EventEmitter2 as EventEmitter } from '@nestjs/event-emitter';
import { OtpService } from './otp.service';
import type { Identifier, RecoveryCode } from './types';
export declare class MfaRecoveryService {
    private readonly storage;
    private readonly otp;
    private readonly emitter;
    private readonly logger;
    constructor(storage: StorageService, otp: OtpService, emitter: EventEmitter);
    /**
     * Persists the generated recovery codes
     *
     * @public
     * @param user
     * @param count
     * @param byteLength
     */
    enable(user: Identifier, count?: number, byteLength?: number): Promise<Set<RecoveryCode> | null>;
    /**
     * Disables recovery
     *
     * @public
     * @param user
     */
    disable(user: Identifier): Promise<boolean>;
    /**
     * Recovers the lost account by creating a new secret
     *
     * @public
     * @param user
     * @param code
     */
    recover(user: Identifier, code: RecoveryCode): Promise<boolean>;
}