/**
 * RFS8484 DoH Resolver
 * https://tools.ietf.org/html/rfc8484
 */
import { BaseResolver } from './base_resolver.js';
import { ResolveOptions } from './dns.js';
import { RecordType } from "./constants.js";
export declare function base64url_encode(buffer: ArrayBuffer): string;
export declare function base64url_decode(value: string): ArrayBuffer;
export default class Resolver extends BaseResolver {
    protected servers: string[];
    resolve(hostname: string, rrtype?: (keyof typeof RecordType) | "ANY", options?: ResolveOptions): Promise<any>;
}