A short tutorial about creating a custom service account and role inside of the Goolge Cloud Platform for sending a Firebase Cloud Message (FCM) from a nodejs project.

firebase-cloud-messaging-nodejs.md

Sending a firebase cloud message from a nodejs project using a custom service acccount

Creating the Service Account

1. open the Google Cloud Platform
2. select your project
3. go to IAM & Admin
4. go to Roles
5. press CREATE ROLE
6. enter a title, description and ID
7. edit the Role launche stage as you please
8. press ADD PERMISSIONS
9. enter cloudmessaging.messages.create in the Filter table field
10. select cloudmessaging.messages.create
11. press ADD
12. press CREATE
13. go to Service Accounts
14. press CREATE SERVICE ACCOUNT
15. enter a name as well as a description
16. press CREATE
17. select your new role
18. press DONE
19. press Create key at the actions of your new service account
20. select JSON and press create
21. download the .json file

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Sending a cloud message from nodejs

22. create an ENV variable GOOGLE_APPLICATION_CREDENTIALS pointing to your downloaded file
23. send a push notification from your nodejs project:

const admin = require("firebase-admin")

admin.initializeApp({
    credential: admin.credential.applicationDefault(),
});

let message = {
    token: "THE CLIENT TOKEN",
    notification: {
        title: "TEST MESSAGE",
        body: "This is a test message.",
    },
};

admin.messaging().send(message)
    .then((response) => {
        console.log('Successfully sent message:', response);
    })
    .catch((error) => {
        console.log('Error sending message:', error);
    });