Develop Reference

Firebase Cloud Function Won't Deploy

I am trying to deploy a callable firebase cloud function to generate an email verification link and then send an email with sendgrid containing the link.
When I deploy I keep getting the error
"code":3,"message":"Function failed on loading user code. This is likely due to a bug in the user code. Error message: Error: please examine your function logs to see the error cause".
I have succesfully deployed 4 other functions so my firebase & other env variables do not seem to be the problem.
Here is my code:
const functions = require("firebase-functions");
const admin = require('firebase-admin');
admin.initializeApp(functions.config().firebase);
const sgMail = require('#sendgrid/mail');
const API_KEY = functions.config().sendgrid.key;
const TEMPLATE_ID = functions.config().sendgrid.template;
sgMail.setApiKey(API_KEY);
exports.sendEmailVerifications = functions.https.onCall((email,context) => {
admin.auth().generateEmailVerificationLink(context.auth.token.email).then((link) => {
const msg = {
to: context.auth.token.email,
from: 'example#example.com',
template: TEMPLATE_ID,
dynamic_template_data: {
emailLink: link
}
};
sgMail.send(msg);
return {"success": true};
}).catch((error) => {
});
});

firebase cloud functions for push notifications are not working

in my flutter app, i have saved every devices token to a collection in firebase database and i wrote the code for firebase cloud functions so it sends a message(notification) for every user that subscribed to a topic and have their token is in the tokens collection but it doesnt send anything when i add something to the topic i subscribed them to, heres my cloud functions code using javascrpit in the index file:
const functions = require('firebase-functions');
const admin = require('firebase-admin');
admin.initializeApp(functions.config().functions);
var newData;
exports.myTrigger = functions.firestore.document('messages/{messageId}').onCreate(async (snapshot, context) => {
//
if (snapshot.empty) {
console.log('No Devices');
return;
}
newData = snapshot.data();
const deviceIdTokens = await admin
.firestore()
.collection('messages')
.get();
var tokens = [];
for (var tokened of deviceIdTokens.docs) {
tokens.push(tokened.data().token);
}
var payload = {
notification: {
title: 'Push Title',
body: 'Push Body',
sound: 'default',
},
data: {
message: newData.message,
click_action: 'FLUTTER_NOTIFICATION_CLICK',
},
};
try {
const response = await admin.messaging().sendToDevice(tokens, payload);
console.log('Notification sent successfully');
} catch (err) {
console.log(err);
}
});
and heres my database structure
and the tokens collection :
what am i doing wrong?

trying his instead :
i should have written :
'''
const deviceIdTokens = await admin
.firestore()
.collection('tokens')
.get()
'''
also for sending a message through the database i should have written "message" in the field because i named the "data"'s key "message" :)

Calling a Firebase Cloud Function 'ForEach' child of a Snapshot

I'm trying to deploy a Firebase Cloud Function that sends a text message to its associated recipient for x number of text messages. The function is triggered in my iOS app when an update is made to the 'send' Realtime Database reference, indicating that the user has pressed the 'send' button.
My Firebase structure is
{
"user1uid": {
"send": false
"messagesToSend": {
"messageuid1": {
"messageText": "What's for dinner?",
"recipientNumber": "+18017378888",
}
"messageuid2:
"messageText": "Who won the Cowboys game?",
"recipientNumber": "+18017377787",
}
}
"user2uid": {
"send": false
"messagesToSend": {
"messageuid1": {
"messageText": "What's for dinner?",
"recipientNumber": "+18017378888",
}
"messageuid2:
"messageText": "Who won the Cowboys game?",
"recipientNumber": "+18017377787",
}
}
}
My code currently only sends one message, and I'm not sure how I can properly iterate through the messagesToSend node for each user and send all the messages in it.
I've been trying to follow the tutorial located here. I have looked at the following Stack Overflow responses but am unable to decipher or derive a solution from them:
Firebase cloud function promises
Am I using ForEach correctly?
My index.js code that sends one message is as follows:
const functions = require('firebase-functions');
// The Firebase Admin SDK to access the Firebase Realtime Database.
const admin = require('firebase-admin');
admin.initializeApp();
const twilio = require('twilio')
const accountSid = functions.config().twilio.sid;
const authToken = functions.config().twilio.token;
const client = new twilio(accountSid, authToken);
const twilioNumber = functions.config().twilio.number;
// Start cloud function
exports.sendSecrets = functions.database
.ref('/{uid}/send')
.onUpdate((change,context) => {
const uid = context.params.uid;
return admin.database().ref(uid+'/messagesToSend').once('value').then(snapshot => {
snapshot.forEach(function(childSnapshot) {
var key = childSnapshot.key;
var messageData = childSnapshot.val();
**if (messageData.sanitized) return true;**
var message = messageData.messageText;
var phoneNumber = messageData.recipientNumber;
const textMessage = {
body: `From My App - ${message}`,
from: twilioNumber, // From Twilio number
to: phoneNumber // Text to this number
}
return client.messages.create(textMessage)
})
**return snapshot.ref.toString();**
});
});
Please note that the lines marked with ** at either end indicate that I know I need to return something based on error messages I received indicating that 'Each then() should return a value or throw'.

I make the assumption that you are using the twilio-node library that use promises: https://www.npmjs.com/package/twilio.
Since you want to send several messages in parallel, you have to use Promise.all(), as follows:
const functions = require('firebase-functions');
// The Firebase Admin SDK to access the Firebase Realtime Database.
const admin = require('firebase-admin');
admin.initializeApp();
const twilio = require('twilio')
const accountSid = functions.config().twilio.sid;
const authToken = functions.config().twilio.token;
const client = new twilio(accountSid, authToken);
const twilioNumber = functions.config().twilio.number;
// Start cloud function
exports.sendSecrets = functions.database
.ref('/{uid}/send')
.onUpdate((change,context) => {
const uid = context.params.uid;
return admin.database().ref(uid+'/messagesToSend').once('value')
.then(snapshot => {
const promises = [];
snapshot.forEach(function(childSnapshot) {
var key = childSnapshot.key;
var messageData = childSnapshot.val();
//**if (messageData.sanitized) return true;**
var message = messageData.messageText;
var phoneNumber = messageData.recipientNumber;
const textMessage = {
body: `From My App - ${message}`,
from: twilioNumber, // From Twilio number
to: phoneNumber // Text to this number
}
promises.push(client.messages.create(textMessage));
})
return Promise.all(promises);
})
// Edits made below to parentheses/brackets
.then(results => {
//Do whatever you want !!
// e.g. print the results which will be an array of messages
// (see https://www.twilio.com/docs/libraries/node#testing-your-installation)
})
});
You can also simply return Promise.all() as follows:
....
return Promise.all(promises);
})
});

Error: Registration token(s) provided to sendToDevice()

Now im working for my final project. I try to send notification using firebase cloud function when its trigger the onUpdate but i got an error. I have follow tutorial on youtube and website but i dont get it. By the way, im new to firebase. below Here is my index.js code :-
const functions = require('firebase-functions');
//Firebase function and handling notification logic
const admin = require('firebase-admin');
admin.initializeApp(functions.config().firebase);
exports.pushNotification = functions.database.ref('/Sensor').onWrite(( change,context) => {
const sensor = change.after.val();
const payload = {
notification: {
Title: "Alert",
Body: "Open pipe detect !",
icon: "default"
}
};
return admin.messaging().sendToDevice(sensor.token, payload)
.then((response)=> {
return console.log("Successfully sent message:", response);
});
});
the project structure is like this:
**water-system**
+--Sensor
+---Pipe
+---pipeName
+---solenoid
+---status // trigger on this update
+---User
+---Id1
+---email
+---name
+---token // token store by this user
+---Id2
+---Id3
+---token // also store token
So when the child node of Sensor have been update it will send notification to User who have store the token(user id1 and id3). Glad if anyone could help me to solve this problem

Try storing the tokens in this format:
"tokens" : {
"cXyVF6oUGuo:APA91bHTSUPy31JjMVTYK" : true,
"deL50wnXUZ0:APA91bGAF-kWMNxyP6LGH" : true,
"dknxCjdSQ1M:APA91bGFkKeQxB8KPHz4o" : true,
"eZunoQspodk:APA91bGzG4J302zS7sfUW" : true
}
Whenever you want to write a new token just do a set:
firebase.app().database().ref(`/user/${uid}/tokens/${token}`).set(true);
And to create an array for sendToDevice:
const tokensList = Object.keys(tokens.val());
return admin.messaging().sendToDevice(tokensList, payload);

Cloud Functions for Firebase and FCM

I recently developed an application for a school and one of its features is principal's updates. For this, I'm using the Firebase database for this (on Android studio and Xcode). I heard that there is a new Firebase feature that calls cloud functions and I heard that I can integrate Database and FCM. For now, I have this code in index.js:
const functions = require('firebase-functions');
const admin = require('firebase-admin');
admin.initializeApp(functions.config().firebase);
// // Create and Deploy Your First Cloud Functions
// // https://firebase.google.com/docs/functions/write-firebase-functions
//
// exports.helloWorld = functions.https.onRequest((request, response) => {
// response.send("Hello from Firebase!");
// });
exports.sendNotifications = functions.database.ref('/messageS/{id}').onWrite(event => {
const snapshot = event.data;
// Only send a notification when a message has been created.
if (snapshot.previous.val()) {
return;
}
// Notification details.
const text = snapshot.val().text;
const payload = {
notification: {
title: 'new message recived',
body: text ? (text.length <= 100 ? text : text.substring(0, 97) + '...') : '',
icon: '/app/src/main/res/drawable/logo_he_digita_homepage.png'
}
};
// Get the list of device tokens.
return admin.database().ref('fcmTokens').once('value').then(allTokens => {
if (allTokens.val()) {
// Listing all tokens.
const tokens = Object.keys(allTokens.val());
// Send notifications to all tokens.
return admin.messaging().sendToDevice(tokens, payload).then(response => {
// For each message check if there was an error.
const tokensToRemove = [];
response.results.forEach((result, index) => {
const error = result.error;
if (error) {
console.error('Failure sending notification to', tokens[index], error);
// Cleanup the tokens who are not registered anymore.
if (error.code === 'messaging/invalid-registration-token' ||
error.code === 'messaging/registration-token-not-registered') {
tokensToRemove.push(allTokens.ref.child(tokens[index]).remove());
}
}
});
return Promise.all(tokensToRemove);
});
}
});
});
I receive the log into Firebase console, but I don't see fcmTokens in the database and the device doesn't get the notification. what should I do?
Thanks for the help.