TimeOut firbase error

error.ts

import {QueryDocumentSnapshot} from "@google-cloud/firestore";
import * as functions from "firebase-functions";
import {EventContext} from "firebase-functions";
import {Storage} from "@google-cloud/storage";

export const shareToAnotherGraph = async (snap: QueryDocumentSnapshot, _context: EventContext, db: FirebaseFirestore.Firestore) => {
  const data = snap.data();
  // The ID of your GCP project
  const projectId = "xx";
  // The ID of the bucket the original object is in
  const sourceBucket = "xx";
  // The ID of the GCS object to copy
  const sourceFile = data.sourcePath;

  functions.logger.log("sourceFile: ", sourceFile);
  // The ID of the bucket to copy the object to
  const destinationBucket = "xx";

  // get the name of the source graph
  const sourceGraphName = String(snap.data().sourceGraphString);
  functions.logger.log("sourceGraphName: ", sourceGraphName);

  // get the name of the destination graph
  const destinationGraphName = String(snap.data().destinationGraphString);
  functions.logger.log("destinationGraphName: ", destinationGraphName);

  // get the name of the node to copy
  const sourceNodeString = String(snap.data().sourceNodeString);
  functions.logger.log("sourceFileName: ", sourceNodeString);

  // get the node of the destination
  const destinationNodeString = String(snap.data().destinationNodeString);
  functions.logger.log("destinationPathName: ", destinationNodeString);

  const storage = new Storage({
    projectId: projectId,
  });

  const [Files] = await storage.bucket(sourceBucket).getFiles({
    prefix: sourceFile,
  });
  // create a regex to use the replace function
  const regex = new RegExp(sourceNodeString, "g");

  // create regex to use for the source graph
  const regexSourceGraph = new RegExp(sourceGraphName, "g");

  // create a bool variable with the value of false
  let fileExists = false;

  for (const file of Files) {
    const fileName = file.name;
    if (fileName.includes(sourceNodeString) || fileName.includes(sourceGraphName)) {
      // const destination = storage.bucket(destinationBucket).file(fileName.replace(regex, destinationNodeString));
      const destination = storage.bucket(destinationBucket).file(fileName.replace(regex, destinationNodeString).replace(regexSourceGraph, destinationGraphName));
      functions.logger.log("Destination file.name: ", file.name);
      await file.copy(destination);
      // check if the file was correctly copied
      const [exists] = await destination.exists();
      if (exists) {
        fileExists = true;
      } else {
        fileExists = false;
      }
    }
  }
  if (fileExists) {
    // delete the document from the shareToAnotherGraph collection
    await db.collection("shareToAnotherGraph").doc(snap.id).delete();
  }
  return;
};