import { AbstractCFS } from "./AbstractCFS";
import { FileSystem } from "../../system/directory";
export declare class PowDAL extends AbstractCFS {
    private static POW_FILE;
    constructor(rootPath: string, qioFS: FileSystem);
    init(): Promise<void>;
    close(): Promise<void>;
    getCurrent(): Promise<string | null>;
    writeCurrent(current: string): Promise<void>;
}