FallbackVerificationProvider class
A verification provider that tries a primary provider first and falls back to fallback when the primary fails.
Useful for remote-first setups where the cloud provider should be tried first, with on-device verification as a safety net:
final provider = FallbackVerificationProvider(
primary: FaceGateCloudProvider(baseUrl: 'https://api.example.com'),
fallback: LocalFaceVerificationProvider(),
);
- Implemented types
Constructors
- FallbackVerificationProvider({required FaceVerificationProvider primary, required FaceVerificationProvider fallback, void onFallback(Object error, StackTrace stack)?})
Properties
- fallback → FaceVerificationProvider
-
The backup provider used when primary throws.
final
- hashCode → int
-
The hash code for this object.
no setterinherited
- onFallback → void Function(Object error, StackTrace stack)?
-
Optional callback invoked when the fallback is used.
Receives the error and stack trace from the primary.
final
- primary → FaceVerificationProvider
-
The preferred provider tried first.
final
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
Methods
-
checkLiveness(
Face face) → Future< LivenessResult> -
Check a face for liveness (anti-spoofing).
override
-
clearAll(
) → Future< void> -
Delete all enrolled templates.
override
-
deleteTemplate(
String id) → Future< void> -
Delete an enrolled template by ID.
override
-
enroll(
String label, List< Face> samples) → Future<FaceTemplate> -
Enroll a new face from multiple sample captures.
override
-
listTemplates(
) → Future< List< FaceTemplate> > -
List all enrolled templates.
override
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
toString(
) → String -
A string representation of this object.
inherited
-
verify(
Face face) → Future< FaceVerificationResult> -
Verify a detected face against enrolled templates.
override
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited