问在构建开启重试的云函数时，如何实现增量回退？

EN

 /**
 * Background Cloud Function that only executes within
 * a certain time period after the triggering event
 *
 * @param {object} event The Cloud Functions event.
 * @param {function} callback The callback function.
 */
exports.avoidInfiniteRetries = (event, callback) => {
  const eventAge = Date.now() - Date.parse(event.timestamp);
  const eventMaxAge = 10000;

  // Ignore events that are too old
  if (eventAge > eventMaxAge) {
    console.log(`Dropping event ${event} with age ${eventAge} ms.`);
    callback();
    return;
  }

  // Do what the function is supposed to do
  console.log(`Processing event ${event} with age ${eventAge} ms.`);
  callback();
};

if(eventAge < 1000 && eventAge > 0)
{
   //Do stuff
}else if (eventAge < 3000 && eventAge > 1000) {
   // Do stuff
}(...)
else{
 return;
}