import { DocumentType, ReturnModelType } from '@typegoose/typegoose';
import { BillMeta, Feedback } from './billMeta.model';
import { RestaurantService } from '~backend/business/restaurant/restaurant.service';
export declare class BillMetaService {
    readonly billMetaModel: ReturnModelType<typeof BillMeta>;
    private readonly restaurantService;
    private readonly logger;
    constructor(billMetaModel: ReturnModelType<typeof BillMeta>, restaurantService: RestaurantService);
    all(): Promise<DocumentType<BillMeta>[]>;
    findOrCreate(billMetaId: string, restaurantId: string, createIfNotExisted?: boolean): Promise<BillMeta>;
    private update;
    updateFeedback(billMetaId: string, restaurant: string, feedback: Feedback): Promise<BillMeta>;
}