/**
 * Usage: https://developer.mozilla.org/en-US/docs/Web/API/IndexedDB_API/Using_IndexedDB
 * Compatibility: https://caniuse.com/#feat=indexeddb
 */
declare class LocalIndexedDB {
    private _db;
    private _version;
    private _database;
    private _storeName;
    private _openLog;
    /**
     * Constructor a new indexedDB object
     * @param database database name
     * @param version database version
     * @param storeName store object name
     * @param openLog - 是否打印 indexedDB 变化
     */
    constructor(database: string, version: number, storeName: string, openLog?: boolean);
    /**
     * Open the database indicated in constructor function.
     * This method return a Promise object which success will resolve db instance.
     */
    open(): Promise<IDBDatabase>;
    private getObjectStore;
    add(value: any, key?: string): Promise<IDBRequest<any>>;
    /**
     * Set a value to store object by key
     * @param key the key of store object
     * @param value the value of store object
     */
    set(key: string, value: any): Promise<IDBRequest<any>>;
    /**
     * Get the value with the given key
     * @param key the key of store object
     */
    get(key: string): Promise<IDBRequest<any>>;
    /**
     * Delete records in store with the given key
     * @param key the key of store object
     */
    delete(key: string): Promise<IDBRequest<any>>;
    /**
     * Delete all data in store object
     */
    clear(): Promise<IDBRequest<any>>;
    /**
     * Get the store object
     */
    getStore(): IDBObjectStore | null;
    /**
     * Wrap the database request result as promise object
     * @param operate A function which operate store
     */
    wrapStoreOperationPromise<T = IDBRequest>(operate: (store: IDBObjectStore) => IDBRequest): Promise<T>;
    private log;
}
export default LocalIndexedDB;