import { TypedEventEmitter } from "@libp2p/interface";
import { peerDiscoverySymbol as symbol } from "@libp2p/interface";
import type { PeerDiscovery, PeerDiscoveryEvents } from "@libp2p/interface";
import { type Libp2pComponents } from "@waku/interfaces";
interface PeerExchangeDiscoveryOptions {
    /**
     * Peer TTL in milliseconds.
     * This is the time after which a peer will be considered stale and will be re-queried via peer exchange.
     *
     * @default 30_000
     */
    TTL: number;
}
export declare class PeerExchangeDiscovery extends TypedEventEmitter<PeerDiscoveryEvents> implements PeerDiscovery {
    private readonly components;
    private readonly peerExchange;
    private readonly options;
    private isStarted;
    private queryingPeers;
    private peerExpirationRecords;
    private continuousDiscoveryInterval;
    constructor(components: Libp2pComponents, options?: Partial<PeerExchangeDiscoveryOptions>);
    /**
     * Start Peer Exchange.
     * Subscribe to "peer:identify" events and handle them.
     */
    start(): void;
    /**
     * Stop Peer Exchange.
     * Unsubscribe from "peer:identify" events.
     */
    stop(): void;
    get [symbol](): true;
    get [Symbol.toStringTag](): string;
    private handleDiscoveredPeer;
    private handlePeriodicDiscovery;
    private runQuery;
    private query;
    private hasShardInfo;
}
export declare function wakuPeerExchangeDiscovery(options?: Partial<PeerExchangeDiscoveryOptions>): (components: Libp2pComponents) => PeerExchangeDiscovery;
export {};