import type { DnsClient, IEnr, NodeCapabilityCount } from "@waku/interfaces";
export declare class DnsNodeDiscovery {
    private readonly dns;
    private readonly _DNSTreeCache;
    private readonly _errorTolerance;
    static dnsOverHttp(dnsClient?: DnsClient): Promise<DnsNodeDiscovery>;
    /**
     * Returns a list of verified peers listed in an EIP-1459 DNS tree. Method may
     * return fewer peers than requested if @link wantedNodeCapabilityCount requires
     * larger quantity of peers than available or the number of errors/duplicate
     * peers encountered by randomized search exceeds the sum of the fields of
     * @link wantedNodeCapabilityCount plus the @link _errorTolerance factor.
     */
    getPeers(enrTreeUrls: string[], wantedNodeCapabilityCount: Partial<NodeCapabilityCount>): Promise<IEnr[]>;
    constructor(dns: DnsClient);
    /**
     * {@inheritDoc getPeers}
     */
    getNextPeer(enrTreeUrls: string[], wantedNodeCapabilityCount: Partial<NodeCapabilityCount>): AsyncGenerator<IEnr>;
    /**
     * Runs a recursive, randomized descent of the DNS tree to retrieve a single
     * ENR record as an ENR. Returns null if parsing or DNS resolution fails.
     */
    private _search;
    /**
     * Retrieves the TXT record stored at a location from either
     * this DNS tree cache or via DNS query.
     *
     * @throws if the TXT Record contains non-UTF-8 values.
     */
    private _getTXTRecord;
}