import { CID } from 'multiformats';
import { SKDB } from './../ipfs/ipfs.interface';
import { PBNode } from '@ipld/dag-pb';
/**
 * mpt
 * 基础数据结构
 */
export declare class Mpt {
    constructor(db: SKDB, root: string);
    db: SKDB;
    root: string;
    rootTree: PBNode;
    initRootTree: () => Promise<void>;
    getKey: (key: string) => Promise<string | undefined>;
    updateKey: (key: string, data: CID) => Promise<void>;
    save: () => Promise<CID>;
}