firebase-cloud-functions

# Firebase Cloud Functions Skill This skill defines how to correctly call Firebase Cloud Functions from Flutter applications. ## When to Use Use this skill when: * Implementing callable Cloud Functions in a Flutter project. * Passing structured data to server-side functions and processing results. * Handling errors, timeouts, and retries for function calls. * Configuring region-specific function deployments. * Testing Cloud Functions locally with the Firebase Emulator Suite. --- ## 1. Setup and Configuration ``` flutter pub add cloud_functions ``` ```dart import 'package:cloud_functions/cloud_functions.dart'; // After Firebase.initializeApp(): final functions = FirebaseFunctions.instance; ``` - Initialize Firebase before using any Cloud Functions features. - For region-specific deployments, specify the region: ```dart final functions = FirebaseFunctions.instanceFor(region: 'europe-west1'); ``` - Deploy callable functions to Firebase **before** attempting to call them from the Flutter app. - Consider implementing **App Check** to prevent abuse of Cloud Functions. --- ## 2. Calling Functions Use `httpsCallable` to reference a function, then `call` to invoke it: ```dart final result = await FirebaseFunctions.instance .httpsCallable('functionName') .call(data); ``` - Pass data as a `Map` — it is automatically serialized to JSON: ```dart final result = await FirebaseFunctions.instance .httpsCallable('addMessage') .call({ "text": messageText, "push...