import { AccessBusinessService } from './access.business.service';
export type DevicePollStatus = 'pending' | 'approved' | 'denied' | 'expired';
export declare class DeviceAuthService {
    private readonly accessBusinessService;
    constructor(accessBusinessService: AccessBusinessService);
    start(): Promise<{
        device_code: string;
        user_code: string;
        verification_uri: string;
        verification_uri_complete: string;
        expires_in: number;
        interval: number;
    }>;
    getForApproval(userCode: string): Promise<{
        status: "not_found";
        user_code?: undefined;
        expires_at?: undefined;
    } | {
        status: "denied";
        user_code: string;
        expires_at?: undefined;
    } | {
        status: "decided";
        user_code: string;
        expires_at?: undefined;
    } | {
        status: "expired";
        user_code: string;
        expires_at?: undefined;
    } | {
        status: "pending";
        user_code: string;
        expires_at: Date;
    }>;
    decide(userCode: string, action: 'approve' | 'deny', businessId?: number): Promise<{
        status: "denied" | "already_decided";
        business_id?: undefined;
    } | {
        status: "approved";
        business_id: number;
    }>;
    poll(deviceCode: string): Promise<Record<string, unknown>>;
    private mintPersonalKey;
    private resolveBusinessForApprove;
    private findByUserCode;
    private normalizeUserCode;
    private generateUserCode;
    private hash;
    private verificationUri;
}