import { Observable } from 'rxjs';
import { ApiPromise2Service } from '../../shared/promise-api2.service';
import * as i0 from "@angular/core";
export declare class ApiDbService {
    private apiPromiseService;
    constructor(apiPromiseService: ApiPromise2Service);
    openDb(): Observable<any>;
    deleteDb(): Observable<any>;
    dbVersion(): Observable<string>;
    static ɵfac: i0.ɵɵFactoryDeclaration<ApiDbService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<ApiDbService>;
}