simple firestore cloud function update document

1import * as functions from 'firebase-functions';
2import * as admin from 'firebase-admin';
3
4admin.initializeApp();
5
6export const resetCounter = functions.https.onRequest((req, res) => {
7    const resetRef =  admin.firestore()
8    .collection('collectionName')
9    .doc('documentName')
10    resetRef.get().then((doc) => {
11        if(doc.exists){
12            resetRef.update({counter: 0})
13              .catch(err => {
14            console.log("Error",err)
15            res.send("500");
16          })
17       }
18    }).catch(err=>{
19      	//Internal server error
20      	console.log("Error",err)
21        res.send("500");
22    });
23  //Successful operation
24  res.send("200");
25});

1import * as functions from 'firebase-functions';
2import * as admin from 'firebase-admin';
3
4admin.initializeApp();
5
6export const setProductsToExpired = functions.https.onRequest(async(request, response) => {
7    const expiredProducts = await admin.firestore()
8      .collection('products')
9      .where('timestamp','<=', admin.firestore.Timestamp.now())
10      .get();
11    
12    const batch = admin.firestore().batch();
13 
14    expiredProducts.forEach(doc => {
15      batch.update(doc.ref,'expired',true);
16    });
17    
18    await batch.commit();
19    //Successful operation
20    response.send("200");
21    });