/**
 * Ping Keycrux Server command implementation
 */
import { Command } from 'commander';
/**
 * Run the ping command
 * @param pubkey Public key of the keycrux service
 * @param relay Relay URL of the service
 * @returns Result of the ping operation
 */
export declare function runPingCommand(pubkey: string, relay: string): Promise<void>;
/**
 * Register the ping command with the CLI
 * @param program Commander program instance
 */
export declare function registerPingCommand(program: Command): void;