/// <reference types="node" />
import { BasePlugin } from '@opentelemetry/core';
import { Dns, DnsPluginConfig } from './types';
/**
 * Dns instrumentation plugin for Opentelemetry
 */
export declare class DnsPlugin extends BasePlugin<Dns> {
    readonly moduleName: string;
    readonly version: string;
    readonly component: string;
    protected _config: DnsPluginConfig;
    constructor(moduleName: string, version: string);
    /** Patches DNS functions. */
    protected patch(): typeof import("dns");
    /** Unpatches all DNS patched function. */
    protected unpatch(): void;
    /**
     * Get the patched lookup function
     */
    private _getLookup;
    /**
     * Creates spans for lookup operations, restoring spans' context if applied.
     */
    private _getPatchLookupFunction;
    /**
     * Start a new span with default attributes and kind
     */
    private _startDnsSpan;
    /**
     * Wrap lookup callback function
     */
    private _wrapLookupCallback;
    /**
     * Safely handle "execute" callback
     */
    private _safeExecute;
}
export declare const plugin: DnsPlugin;