import type { Constructor } from 'atma-utils';
export interface IObjectStoreOptions<T, TOut = T> {
    path: string;
    map?(x: T): TOut;
    serialize?(x: T): any;
    Type?: Constructor<T>;
    format?: boolean;
    default?: TOut;
    watchFs?: boolean;
    onFsChanged?: () => any;
    transport?: 'file' | 'localStorage';
}
export declare class JsonObjectStore<T> {
    options: IObjectStoreOptions<T>;
    private data;
    private fs;
    constructor(options: IObjectStoreOptions<T>);
    get(opts?: {
        cloned?: boolean;
    }): Promise<this['options']['default']>;
    save(data: T): Promise<T>;
    getLock(): import("atma-utils").class_Dfr<any>;
    private onStoreChanged;
    private restore;
}