export interface IStorage {
    setItem(key: string, value: string): void;
    getItem(key: string): string | null;
    removeItem(key: string): void;
    itemExists(key: string): boolean;
    keys(): IterableIterator<string>;
    reload(key: string): Promise<string | null>;
}
export declare class SyncIDBStorage implements IStorage {
    dbName: string;
    storeName: string;
    private db;
    memoryCache: Record<string, string>;
    uncommited: number;
    static create(dbName?: string, storeName?: string): Promise<SyncIDBStorage>;
    constructor(dbName?: string, storeName?: string);
    private _initDB;
    private _loadAllData;
    getItem(key: string): string | null;
    setItem(key: string, value: string): void;
    removeItem(key: string): void;
    itemExists(key: string): boolean;
    keys(): IterableIterator<string>;
    reload(key: string): Promise<string | null>;
    private _getFromIndexedDB;
    private _saveToIndexedDB;
    private _deleteFromIndexedDB;
}