import { Observable } from 'rxjs';
/**
 * Reads the keys present in the store
 *
 * @example
 * const database$ = connectIndexedDb('test_db');
 * const autoIncrementStore$ = database$.pipe(getObjectStore('test_autoincrement_store', { autoIncrement: true }));
 *
 * // we append one item to the store
 * autoIncrementStore$
 *   .pipe(
 *     addItem('item')
 *   ).subscribe()
 *
 * const storeKeys$: Observable<IDBValidKey[]> = autoIncrementStore$
 *   .pipe(
 *     keys()
 *   );
 *
 * storeKeys$.subscribe((keys: IDBValidKey[]) => {
 *     // You can display the keys in UI
 *   });
 *
 * @remarks Emits an empty array when the database gets deleted
 * @returns Observable<IDBValidKey[]>
 */
export declare function keys(): (s$: Observable<IDBObjectStore>) => Observable<IDBValidKey[]>;
/**
 * Reads the values from the store
 *
 * @example
 * const database$ = connectIndexedDb('test_db');
 * const autoIncrementStore$ = database$.pipe(getObjectStore('test_autoincrement_store', { autoIncrement: true }));
 *
 * // we append one item to the store
 * autoIncrementStore$
 *   .pipe(
 *     addItem('item')
 *   ).subscribe()
 *
 * const storeKeys$: Observable<string[]> = autoIncrementStore$
 *   .pipe(
 *     values()
 *   );
 *
 * storeKeys$.subscribe((keys: string[]) => {
 *     // You can display the keys in UI
 *   });
 *
 * @remarks Emits an empty array when the database gets deleted
 * @returns Observable<T[]>
 */
export declare function values<T = []>(): (s$: Observable<IDBObjectStore>) => Observable<T>;
/**
 * Reads the entries (key-value pairs) from the store
 *
 * @example
 * const database$ = connectIndexedDb('test_db');
 * const autoIncrementStore$ = database$.pipe(getObjectStore('test_autoincrement_store', { autoIncrement: true }));
 *
 * // we append one item to the store
 * autoIncrementStore$
 *   .pipe(
 *     addItem('item')
 *   ).subscribe()
 *
 * const entries$: Observable<string[]> = autoIncrementStore$
 *   .pipe(
 *     entries()
 *   );
 *
 * entries$.subscribe((entries: { key: IDBValidKey, value: any }[]) => {
 *     // You can display the keys and their corresponding values in UI
 *   });
 *
 * @remarks Emits an empty array when the database gets deleted
 * @returns Observable<T[]>
 */
export declare function entries<T = any>(): (s$: Observable<IDBObjectStore>) => Observable<{
    key: IDBValidKey;
    value: T;
}[]>;