/// <reference types="node" />
import { Readable } from 'stream';
import * as parser from './parser';
interface Options {
    clean: boolean;
}
/**
 * es6-map can preserve insertion order even if ES version is older.
 *
 * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map#Description
 * It should be noted that a Map which is a map of an object, especially
 * a dictionary of dictionaries, will only map to the object's insertion
 * order. In ES2015 this is ordered for objects but for older versions of
 * ES, this may be random and not ordered.
 *
 */
interface Callback {
    (e?: Error, d?: any): void;
}
export default class Store {
    private _inflights;
    readonly options: Options;
    /**
     * In-memory implementation of the message store
     * This can actually be saved into files.
     *
     * @param {Object} [options] - store options
     */
    constructor(options?: Options);
    /**
     * Adds a packet to the store, a packet is
     * anything that has a messageId property.
     *
     */
    put(packet: parser.Packet, cb: Callback): this;
    /**
     * Creates a stream with all the packets in the store
     *
     */
    createStream(): Readable;
    /**
     * deletes a packet from the store.
     */
    del(packet: parser.Packet, cb: Callback): this;
    /**
     * get a packet from the store.
     */
    get(packet: parser.Packet, cb: Callback): this;
    /**
     * Close the store
     */
    close(cb?: Callback): void;
}
export {};