how to readFile before writeToFile() about proxyman HOT 5 OPEN

async function onResponse(context, url, request, response) {

  const filename = request.queries.page;

  const path_to_local_file = "~/Desktop/" + filename + ".json"
  if ("path_to_local_file not exists or path_to_local_file content is empty") {
     writeToFile(response.body, path_to_local_file);
  } else {
       var local_file_json = JSON.parse(path_to_local_file's content)
       if (local_file_json.some_value != response.body.some_value) {
           // to update local file
           writeToFile(response.body, path_to_local_file);
       } else {
           // no nothing or just print some log
       }
  }

  return response;
}

async function onResponse(context, url, request, response) {

  const textFilePath = "~/Desktop/myfile.json";
  
  // check exist
  if (isFileExists(filePath)) {
  
    // read from file
    const text = readFromFile(textFilePath);
    
    // pares string to JSON Object
    const obj = JSON.parse(text);
  }
  
  // Read binary file
  const binaryFilePath = "~/Desktop/screenshot.png";
  const binaryFile = readFromFile(binaryFilePath); // Uint8Array
  
  // Done
  return response;
}