diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2ec8c92..4a8c563 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+## 1.1.0
+
+* Some helper methods to distinguish ffi implementations from dart only 
+  implementations,etc.
+
 ## 1.0.0
 
 * Nullsafety migration
diff --git a/lib/src/argon2_ffi_base.dart b/lib/src/argon2_ffi_base.dart
index abba463..f57ab58 100644
--- a/lib/src/argon2_ffi_base.dart
+++ b/lib/src/argon2_ffi_base.dart
@@ -3,10 +3,19 @@ import 'dart:typed_data';
 typedef ResolveLibrary = String Function(String baseName);
 
 abstract class Argon2 {
+  const Argon2();
+
   /// forces loading of dynamic library on MacOS instead of assuming
   /// argon2 was statically linked. (ie. flutter usage, vs dart usage)
   static bool resolveLibraryForceDynamic = false;
 
+  /// flag whether it is a native (ffi) implementation, or dart.
+  bool get isFfi;
+
+  /// whether this is actually implemented or throws [UnimplementedError]
+  /// (Currently on web platform).
+  bool get isImplemented;
+
   Uint8List argon2(Argon2Arguments args);
 
   Future<Uint8List> argon2Async(Argon2Arguments args);
diff --git a/lib/src/argon2_ffi_impl.dart b/lib/src/argon2_ffi_impl.dart
index 7fe257a..8369d5b 100644
--- a/lib/src/argon2_ffi_impl.dart
+++ b/lib/src/argon2_ffi_impl.dart
@@ -40,9 +40,16 @@ typedef Argon2Hash = Pointer<Utf8> Function(
 );
 
 abstract class Argon2Base extends Argon2 {
+  const Argon2Base();
+
 //  @protected
   Argon2Hash get argon2hash;
 
+  @override
+  bool get isFfi => true;
+  @override
+  bool get isImplemented => true;
+
   @override
   Uint8List argon2(Argon2Arguments args) {
     final keyPtr = Uint8ArrayUtils.toPointer(args.key);
diff --git a/lib/src/argon2_ffi_noop.dart b/lib/src/argon2_ffi_noop.dart
index 4caeee8..ac032b9 100644
--- a/lib/src/argon2_ffi_noop.dart
+++ b/lib/src/argon2_ffi_noop.dart
@@ -6,7 +6,12 @@ import 'package:argon2_ffi_base/src/argon2_ffi_base.dart';
 /// from `argon2_ffi_impl.dart` is used.
 class Argon2FfiFlutter extends Argon2 {
   // ignore: avoid_unused_constructor_parameters
-  Argon2FfiFlutter({ResolveLibrary? resolveLibrary});
+  const Argon2FfiFlutter({ResolveLibrary? resolveLibrary});
+
+  @override
+  bool get isFfi => false;
+  @override
+  bool get isImplemented => false;
 
   @override
   Uint8List argon2(Argon2Arguments args) {
diff --git a/pubspec.lock b/pubspec.lock
index 429c181..2aacb19 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -7,14 +7,14 @@ packages:
       name: ffi
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.0"
+    version: "1.1.2"
   logging:
     dependency: "direct main"
     description:
       name: logging
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.0"
+    version: "1.0.1"
   path:
     dependency: "direct main"
     description:
@@ -28,6 +28,6 @@ packages:
       name: pedantic
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.11.0"
+    version: "1.11.1"
 sdks:
   dart: ">=2.12.0 <3.0.0"
diff --git a/pubspec.yaml b/pubspec.yaml
index 96cfd90..68ff2e3 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,15 +1,15 @@
 name: argon2_ffi_base
 description: Base package defining the interface for an Argon2 implementation.
-version: 1.0.0
+version: 1.1.0
 homepage: https://github.com/authpass/argon2_ffi_base
 
 environment:
   sdk: '>=2.12.0 <3.0.0'
 
 dependencies:
-  ffi: ^1.0.0
-  logging: ^1.0.0
-  path: ^1.8.0
+  ffi: ">=1.0.0 <2.0.0"
+  logging: ">=1.0.0 <2.0.0"
+  path: ">=1.8.0 <2.0.0"
 
 dev_dependencies:
-  pedantic: ^1.11.0
+  pedantic: ">=1.11.0 <2.0.0"