Sending push notifications using Firebase Cloud Messaging (FCM)

The app integrates Firebase Admin SDK to authenticate using a service account key and send notifications to simulated registered devices via their FCM tokens.

REST API Endpoint

Send a push notification to a mobile device.

POST /firebase/notifications

Example Request

curl -X POST http://localhost:8080/firebase/notifications \
-H "Content-Type: application/json" \
-d '{
  "recipientToken": "your_device_token_here",
  "title": "Test Notification",
  "body": "Congratulations, it works!",
  "extraData": {
    "Day": "6",
    "Month": "1",
    "Year": "2025"
  }
}'