import type { Trace } from './trace/trace.node.js';
/**
 * Options for ping function.
 * @typedef {Object} PingOptions
 * @property {number} [timeout=30000] - The timeout value in milliseconds.
 * @property {number} [interval=10000] - The interval between retries in milliseconds.
 * @property {number} [retries=3] - The number of retries.
 * @property {Trace} [logger] - The logger object for logging.
 */
export type PingOptions = {
    timeout?: number;
    interval?: number;
    retries?: number;
    logger?: Trace;
};
/**
 * Checks the availability of a service by pinging it.
 * @param {string} urlString - The URL of the service.
 * @param {PingOptions} [options={}] - The options for pinging.
 * @returns {Promise<boolean>} A promise that resolves to true if the service is available, otherwise false.
 */
export declare function ping(urlString: string, { timeout, interval, retries, logger }?: PingOptions): Promise<boolean>;