import type { PeerDiscovery, PeerDiscoveryEvents } from "@libp2p/interface-peer-discovery";
import { symbol } from "@libp2p/interface-peer-discovery";
import { EventEmitter } from "@libp2p/interfaces/events";
import { NodeCapabilityCount } from "./dns";
/**
 * Parse options and expose function to return bootstrap peer addresses.
 *
 * @throws if an invalid combination of options is passed, see [[BootstrapOptions]] for details.
 */
export declare class PeerDiscoveryDns extends EventEmitter<PeerDiscoveryEvents> implements PeerDiscovery {
    private readonly nextPeer;
    private _started;
    /**
     * @param enrUrl An EIP-1459 ENR Tree URL. For example:
     * "enrtree://AOFTICU2XWDULNLZGRMQS4RIZPAZEHYMV4FYHAPW563HNRAOERP7C@test.nodes.vac.dev"
     * @param wantedNodeCapabilityCount Specifies what node capabilities
     * (protocol) must be returned.
     */
    constructor(enrUrl: string, wantedNodeCapabilityCount: Partial<NodeCapabilityCount>);
    /**
     * Start discovery process
     */
    start(): Promise<void>;
    /**
     * Stop emitting events
     */
    stop(): void;
    get [symbol](): true;
    get [Symbol.toStringTag](): string;
}