export declare const isJSON: (str: string) => boolean;
export declare const SafeJSON: Pick<typeof JSON, 'parse' | 'stringify'>;
/**
 * 安全的json读写类
 * ```ts
 * // usage
 * const file = new RCManager('./config.json')
 * file.set('token', 'xxx')
 * file.get('token')
 * file.delete('token')
 * ```
 */
export declare class RCManager {
    private path;
    constructor(path: string);
    get(key?: string): Promise<any>;
    getSync(key?: string): any;
    set(key: string, value: any): Promise<void>;
    setSync(key: string, value: any): void;
    delete(key: string): Promise<void>;
    deleteSync(key: string): void;
}