import CNShell from "cn-shell";
export declare class CNStorageEngine extends CNShell {
  private _storageDir;
  private _keepOpenInterval;
  private _closeStorageTimer;
  private _stores;
  constructor(name: string);
  start(): Promise<boolean>;
  stop(): Promise<void>;
  healthCheck(): Promise<boolean>;
  private checkStorage;
  private setupCreateRoute;
  private setupReadRoute;
  private getStore;
  get(name: string, key: string): Promise<string | null>;
  write(name: string, key: string, value: string): Promise<boolean>;
  del(name: string, key: string): Promise<boolean>;
}