function handleRequest(request) {
  // Obtain the client IP through the request.eo.clientIp
  const ip = request.eo.clientIp || '';
  
  // Respond with JSON data
  return new Response(JSON.stringify({ ip }), {
    headers: { 'content-type': 'application/json' },
  });
}

addEventListener('fetch', event => {
  event.respondWith(handleRequest(event.request));
});