Here you can find the tutorial about E3kit integration into Flutter:
Step 1
flutter create -i swift virgil_crypto_app
[setup firebase for flutter]…Also follow the steps from the new Firebase Cloud Functions demo.
Step 2
Inside the Flutter project, go to ‘ios/Podfile’, then to “target ‘Runner’ do” and below use_frameworks! add pod ‘VirgilE3Kit’.
Step 3
Open terminal and inside the project folder (virgil_crypto_app) run ‘flutter run’ - it will install all pods and dependencies.
Step 4
Open iOS folder in Xcode and import from demo-firebase-ios sample (development branch, not master) the following files: Log, E3kitHelper and UserAuthorizer.
Step 5
Leave Xcode and go to Flutter project (different IDE).
Open the file where the methods need calling (for example, the code could be placed in the authentication service).
import 'dart:async';
import 'package:flutter/services.dart'; // <= Import MethodChannel
import 'package:firebase_auth/firebase_auth.dart';
abstract class BaseAuth {
Future<Object> signIn (String email, String password);
Future<Object> createUser (String email, String password);
Future<void> signOut();
}
class Auth implements BaseAuth {
// =============Crypto Helper Channel Begin================
static const MethodChannel methodChannel = MethodChannel('samples.flutter.io/crypto');
Future<String> _cryptoSignIn(String email, String password) async {
try {
final result = await methodChannel.invokeMethod('cryptoSignIn', [email, password]);
return result;
} on PlatformException {
return 'Failed to get Virgil Crypto.';
}
}
Future<String> _cryptoSignUp(String email, String password) async {
try {
final result = await methodChannel.invokeMethod('cryptoSignUp', [email, password]);
return result;
} on PlatformException {
return 'Failed to get Virgil Crypto.';
}
}
// =============Crypto Helper Channel End================
// Firebase Auth
final FirebaseAuth _fAuth = FirebaseAuth.instance;
Future<Object> signIn (String email, String password) async {
FirebaseUser user = await _fAuth.signInWithEmailAndPassword(email: email, password: password);
Future<String> response = _cryptoSignIn(email, password);
print(await response);
return await response;
}
Future<Object> createUser (String email, String password) async {
FirebaseUser user = await _fAuth.createUserWithEmailAndPassword(email: email, password: password);
Future<String> response = _cryptoSignUp(email, password);
print(await response);
return await response;
}
Future<void> signOut() async {
return _fAuth.signOut();
}
}
Step 6
Go to Runner/Runner/AppDelegate.swift and you will see:
import UIKit
import Flutter
@UIApplicationMain
@objc class AppDelegate: FlutterAppDelegate {
static let jwtEndpoint = "https://[..].cloudfunctions.net/api/get-virgil-jwt"
override func application(
_ application: UIApplication,
didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?
) -> Bool {
let controller : FlutterViewController = window?.rootViewController as! FlutterViewController;
let cryptoChannel = FlutterMethodChannel.init(name: "samples.flutter.io/crypto",
binaryMessenger: controller);
cryptoChannel.setMethodCallHandler({
(call: FlutterMethodCall, result: @escaping FlutterResult) -> Void in
let method = call.method;
let args = call.arguments as! [String];
// List of methods called from Flutter code
if(method == "cryptoSignIn"){
self.cryptoSignIn(result: result, email: args[0], password: args[1]);
}
else if (method == "cryptoSignUp"){
self.cryptoSignUp(result: result, email: args[0], password: args[1])
}
else {
result(FlutterMethodNotImplemented);
}
});
GeneratedPluginRegistrant.register(with: self)
return super.application(application, didFinishLaunchingWithOptions: launchOptions)
}
let virgilHelper = UserAuthorizer();
private func cryptoSignIn(result: @escaping FlutterResult, email: String, password: String) {
virgilHelper.signIn(email: email, password: password) {error in
var res: String;
// return some feedback
res = error == nil ? "ok" : "Virgil sign in failed with error: \(error!.localizedDescription)";
result(res);
}
}
private func cryptoSignUp(result: @escaping FlutterResult, email: String, password: String) {
virgilHelper.signUp(email: email, password: password) {error in
var res: String;
// return some feedback
res = error == nil ? "ok" : "Virgil sign up failed with error: \(error!.localizedDescription)";
result(res);
}
}
}Step 7
Go to Xcode and run Runner - stop after building the app - then go to Flutter and develop the app.