Cloud Functions and Storage: Is deleting file asynchronous? - google-cloud-functions

Question

In my Google Cloud Functions script, I want to delete a Google Cloud Storage file by using the following code:
const gcs = require('#google-cloud/storage')()
exports.deletePost = functions.https.onRequest((request, response) => {
if(!context.auth) {
throw new functions.https.HttpsError('failed-precondition', 'The function must be called while authenticated.');
}
const the_post = request.query.the_post;
const filePath = context.auth.uid + '/posts/' + the_post;
const bucket = gcs.bucket('android-com')
const file = bucket.file(filePath)
const pr = file.delete()
});
The problem is that I also need to delete a Google Firebase Firestore database entry after having deleted the Storage file. So I would want to know if I could do it within, for example, a promise that would be returned by delete?
PS : I don't find the doc

Answer 1

The code file.delete() is asynchronous and returns a Promise, as defined in the Google Cloud Storage: Deleting objects documentation.
To delete an object from one of your Cloud Storage buckets:
// Imports the Google Cloud client library
const {Storage} = require('#google-cloud/storage');
// Creates a client
const storage = new Storage();
/**
* TODO(developer): Uncomment the following lines before running the sample.
*/
// const bucketName = 'Name of a bucket, e.g. my-bucket';
// const filename = 'File to delete, e.g. file.txt';
// Deletes the file from the bucket
await storage
.bucket(bucketName)
.file(filename)
.delete();
console.log(`gs://${bucketName}/${filename} deleted.`);
It's not overly clear, but because the await syntax is used, this implies that the result of the expression to it's right is a Promise.
Note: Most of the useful Google Cloud Storage documentation can be found here.