Unhandled Exception: UnimplementedError: RecaptchaVerifier is not implemented flutter app

Question

i have same errors, ple help me if you fixed, but i had login ok, waiting very long time

E/flutter ( 3477): [ERROR:flutter/lib/ui/ui_dart_state.cc(186)] Unhandled Exception: UnimplementedError: RecaptchaVerifier is not implemented
E/flutter ( 3477): #0      RecaptchaVerifierFactoryPlatform.instance (package:firebase_auth_platform_interface/src/platform_interface/platform_interface_recaptcha_verifier_factory.dart:
54:7)
E/flutter ( 3477): #1      RecaptchaVerifier._factory (package:firebase_auth/src/recaptcha_verifier.dart:11:40)
E/flutter ( 3477): #2      RecaptchaVerifier._factory (package:firebase_auth/src/recaptcha_verifier.dart)
E/flutter ( 3477): #3      new RecaptchaVerifier (package:firebase_auth/src/recaptcha_verifier.dart:56:7)
E/flutter ( 3477): #4      ApiProvider.signInWithPhoneNumber (package:clone_cgv/persistence/api_provider/api.dart:141:52)
E/flutter ( 3477): #5      Repository.signInWithPhoneNumber (package:clone_cgv/persistence/repositories/repo.dart:52:27)
E/flutter ( 3477): #6      LoginBloc.signInWithPhoneNumber (package:clone_cgv/blocs/login_blocs/bloc_login.dart:71:24)
E/flutter ( 3477): #7      _LoginPagesState._authenticateUserWithPhone (package:clone_cgv/pages/login_pages/login.dart:79:15)
E/flutter ( 3477): #8      GestureRecognizer.invokeCallback (package:flutter/src/gestures/recognizer.dart:182:24)
E/flutter ( 3477): #9      TapGestureRecognizer.handleTapUp (package:flutter/src/gestures/tap.dart:607:11)
E/flutter ( 3477): #10     BaseTapGestureRecognizer._checkUp (package:flutter/src/gestures/tap.dart:296:5)
E/flutter ( 3477): #11     BaseTapGestureRecognizer.acceptGesture (package:flutter/src/gestures/tap.dart:267:7)
E/flutter ( 3477): #12     GestureArenaManager.sweep (package:flutter/src/gestures/arena.dart:157:27)
E/flutter ( 3477): #13     GestureBinding.handleEvent (package:flutter/src/gestures/binding.dart:385:20)
E/flutter ( 3477): #14     GestureBinding.dispatchEvent (package:flutter/src/gestures/binding.dart:361:22)
E/flutter ( 3477): #15     RendererBinding.dispatchEvent (package:flutter/src/rendering/binding.dart:278:11)
E/flutter ( 3477): #16     GestureBinding._handlePointerEventImmediately (package:flutter/src/gestures/binding.dart:316:7)
E/flutter ( 3477): #17     GestureBinding.handlePointerEvent (package:flutter/src/gestures/binding.dart:280:5)
E/flutter ( 3477): #18     GestureBinding._flushPointerEventQueue (package:flutter/src/gestures/binding.dart:238:7)
E/flutter ( 3477): #19     GestureBinding._handlePointerDataPacket (package:flutter/src/gestures/binding.dart:221:7)
E/flutter ( 3477): #20     _rootRunUnary (dart:async/zone.dart:1370:13)
E/flutter ( 3477): #21     _CustomZone.runUnary (dart:async/zone.dart:1265:19)
E/flutter ( 3477): #22     _CustomZone.runUnaryGuarded (dart:async/zone.dart:1170:7)
E/flutter ( 3477): #23     _invoke1 (dart:ui/hooks.dart:180:10)
E/flutter ( 3477): #24     PlatformDispatcher._dispatchPointerDataPacket (dart:ui/platform_dispatcher.dart:276:7)
E/flutter ( 3477): #25     _dispatchPointerDataPacket (dart:ui/hooks.dart:96:31)
E/flutter ( 3477):
W/IInputConnectionWrapper( 3477): getTextBeforeCursor on inactive InputConnection
W/IInputConnectionWrapper( 3477): getSelectedText on inactive InputConnection
W/IInputConnectionWrapper( 3477): getTextAfterCursor on inactive InputConnection
E/zzf     ( 3477): Problem retrieving SafetyNet Token: 7:
I/Timeline( 3477): Timeline: Activity_launch_request time:532100882
I/zzkn    ( 3477): Provider GmsCore_OpenSSL not available
W/Activity( 3477): Slow Operation: Activity com.example.clone_cgv/com.google.firebase.auth.internal.RecaptchaActivity onResume took 123ms
W/System  ( 3477): Ignoring header X-Firebase-Locale because its value was null.
I/Timeline( 3477): Timeline: Activity_launch_request time:532102862
W/System  ( 3477): A resource failed to call end.
W/System  ( 3477): Ignoring header X-Firebase-Locale because its value was null.
W/BpBinder( 3477): Slow Binder: BpBinder transact took 268ms, interface=com.google.android.gms.auth.api.phone.internal.ISmsRetrieverApiService, code=1 oneway=false
W/System  ( 3477): Ignoring header X-Firebase-Locale because its value was null.
W/System  ( 3477): Ignoring header X-Firebase-Locale because its value was null.
D/FirebaseAuth( 3477): Notifying id token listeners about user ( oPv63pimn1au0qx8tlinSS6L69xx

Blockquote

). D/FirebaseAuth( 3477): Notifying auth state listeners about user ( oPv63pimn1au0qx8tlinSS6L69xx ).

Answer 1

I guess you've tried signInWithPhoneNumber() on your Android mobile platform as I can see:

W/BpBinder( 3477): Slow Binder: BpBinder transact took 268ms,
interface=com.google.android.gms.auth.api.phone.internal.ISmsRetrieverApiService,
code=1 oneway=false

But unfortunately if you read the docstring (Also available at https://firebase.flutter.dev/docs/auth/phone/#web-signinwithphonenumber) of signInWithPhoneNumber(), it says:

Future<ConfirmationResult> signInWithPhoneNumber(String phoneNumber, [RecaptchaVerifier? verifier])
package:firebase_auth/firebase_auth.dart

Starts a sign-in flow for a phone number.

You can optionally provide a [RecaptchaVerifier] instance to control the reCAPTCHA widget apperance and behavior.

Once the reCAPTCHA verification has completed, called [ConfirmationResult.confirm] with the users SMS verification code to complete the authentication flow.

This method is only available on web based platforms.

And the last sentence,

This method is only available on web based platforms.

---

So, IN SHORT,

Mobile Platform

• verifyPhoneNumber()

Web Platform

• signInWithPhoneNumber()

as follows: https://firebase.google.com/docs/auth/flutter/phone-auth