fix(example): encrypted seed import (#16)

* example: show a snackbar for login exceptions

I'm assuming that auth state changes to a null user results in the error messages being cleared from the status bar

* fix encrypted mnemonic json parsing

* validate passwords - remove non-allowed characters

getMnemonic function fails upon registration if the password contains '<', '>', or '&'

---------

Co-authored-by: CharlVS <[email protected]>

packages/komodo_defi_framework/app_build/build_config.json

@@ -28,7 +28,7 @@
     "coins": {
         "fetch_at_build_enabled": true,
         "update_commit_on_build": true,
-        "bundled_coins_repo_commit": "5e12a42ea95f8f50667291c7adae881eef513bf0",
+        "bundled_coins_repo_commit": "d7906da4ab0283ea7dcd22d8b5157a8a46eac0f2",
         "coins_repo_api_url": "https://api.github.com/repos/KomodoPlatform/coins",
         "coins_repo_content_url": "https://komodoplatform.github.io/coins",
         "coins_repo_branch": "master",

packages/komodo_defi_sdk/example/lib/main.dart

@@ -159,10 +159,20 @@ class _KomodoAppState extends State<KomodoApp> {
       });
     } on AuthException catch (e) {
       setState(() {
+        _scaffoldKey.currentState?.showSnackBar(
+          SnackBar(
+            content: Text('Auth Error: (${e.type}) ${e.message}'),
+          ),
+        );
         _statusMessage = 'Auth Error: (${e.type}) ${e.message}';
       });
     } catch (e) {
       setState(() {
+        _scaffoldKey.currentState?.showSnackBar(
+          SnackBar(
+            content: Text('An unexpected error occurred: $e'),
+          ),
+        );
         _statusMessage = 'An unexpected error occurred: $e';
       });
     }
@@ -254,11 +264,11 @@ class _KomodoAppState extends State<KomodoApp> {
               TextFormField(
                 controller: _walletNameController,
                 decoration: const InputDecoration(labelText: 'Wallet Name'),
-                validator: notEmptyValidator,
+                validator: passwordValidator,
               ),
               TextFormField(
                 controller: _passwordController,
-                validator: notEmptyValidator,
+                validator: passwordValidator,
                 decoration: InputDecoration(
                   labelText: 'Password',
                   suffixIcon: IconButton(
@@ -723,10 +733,15 @@ class _KomodoAppState extends State<KomodoApp> {
     );
   }
 
-  String? notEmptyValidator(String? input, {String? fieldName}) {
+  String? passwordValidator(String? input, {String? fieldName}) {
     if (input == null || input.isEmpty) {
       return 'Please enter a ${fieldName ?? 'value'}.';
     }
+
+    if (input.contains(RegExp('[<>&]'))) {
+      return "Invalid password: contains '<', '>', or '&'";
+    }
+
     return null;
   }
 

packages/komodo_defi_sdk/example/web/kdf/res/kdf_wrapper.dart

@@ -3,11 +3,12 @@
 import 'dart:async';
 // This is a web-specific file, so it's safe to ignore this warning
 // ignore: avoid_web_libraries_in_flutter
-import 'dart:js' as js;
+import 'dart:js_interop';
+import 'dart:js_interop_unsafe';
 
 import 'package:flutter/services.dart';
 import 'package:flutter_web_plugins/flutter_web_plugins.dart';
-import 'package:js/js_util.dart';
+import 'package:web/web.dart';
 
 class KdfPlugin {
   static void registerWith(Registrar registrar) {
@@ -57,38 +58,57 @@ class KdfPlugin {
 
     final completer = Completer<void>();
 
-    final script =
-        js.context['document'].callMethod('createElement', ['script']);
-    script['src'] = 'kdf/kdflib.js';
-    script['onload'] = js.allowInterop(() {
-      _libraryLoaded = true;
-      completer.complete();
-    });
-    script['onerror'] = js.allowInterop((event) {
-      completer.completeError('Failed to load kdflib.js');
-    });
+    final script = (document.createElement('script') as HTMLScriptElement)
+      ..src = 'kdf/kdflib.js'
+      ..onload = () {
+        _libraryLoaded = true;
+        completer.complete();
+      }.toJS
+      ..onerror = (event) {
+        completer.completeError('Failed to load kdflib.js');
+      }.toJS;
 
-    js.context['document']['head'].callMethod('appendChild', [script]);
+    document.head!.appendChild(script);
 
     return completer.future;
   }
 
   Future<int> _mm2Main(String conf, Function logCallback) async {
     await _ensureLoaded();
-    return dartify(
-      js.context.callMethod('mm2_main', [conf, js.allowInterop(logCallback)]),
-    )! as int;
+
+    try {
+      final jsCallback = logCallback.toJS;
+      final jsResponse = globalContext.callMethod(
+        'mm2_main'.toJS,
+        [conf.toJS, jsCallback].toJS,
+      );
+      if (jsResponse == null) {
+        throw Exception('mm2_main call returned null');
+      }
+
+      final dynamic dartResponse = (jsResponse as JSAny?).dartify();
+      if (dartResponse == null) {
+        throw Exception('Failed to convert mm2_main response to Dart');
+      }
+
+      return dartResponse as int;
+    } catch (e) {
+      throw Exception('Error in mm2_main: $e\nConfig: $conf');
+    }
   }
 
   int _mm2MainStatus() {
     if (!_libraryLoaded) {
       throw StateError('KDF library not loaded. Call ensureLoaded() first.');
     }
-    return js.context.callMethod('mm2_main_status') as int;
+
+    final jsResult = globalContext.callMethod('mm2_main_status'.toJS);
+    return jsResult.dartify()! as int;
   }
 
   Future<int> _mm2Stop() async {
     await _ensureLoaded();
-    return js.context.callMethod('mm2_stop') as int;
+    final jsResult = globalContext.callMethod('mm2_stop'.toJS);
+    return jsResult.dartify()! as int;
   }
 }

packages/komodo_defi_types/lib/src/cryptography/mnemonic.dart

@@ -84,18 +84,14 @@ class EncryptedMnemonicData {
 
   // Factory method to create EncryptedMnemonicData from JSON
   factory EncryptedMnemonicData.fromJson(Map<String, dynamic> json) {
-    final encryptedData =
-        json.valueOrNull<JsonMap>('encrypted_mnemonic_data') ??
-            (throw ArgumentError('Invalid encrypted mnemonic data'));
-
     return EncryptedMnemonicData(
-      encryptionAlgorithm: encryptedData.value<String>('encryption_algorithm'),
+      encryptionAlgorithm: json.value<String>('encryption_algorithm'),
       keyDerivationDetails: Argon2Details.fromJson(
-        encryptedData.value<JsonMap>('key_derivation_details'),
+        json.value<JsonMap>('key_derivation_details'),
       ),
-      iv: encryptedData.value<String>('iv'),
-      ciphertext: encryptedData.value<String>('ciphertext'),
-      tag: encryptedData.value<String>('tag'),
+      iv: json.value<String>('iv'),
+      ciphertext: json.value<String>('ciphertext'),
+      tag: json.value<String>('tag'),
     );
   }
 
@@ -160,15 +156,21 @@ class Argon2Details {
 
   // Factory method to create Argon2Details from JSON
   factory Argon2Details.fromJson(Map<String, dynamic> json) {
-    // final argon2Params = json.value<JsonMap>('Argon2', 'params');
+    var argon2Params = json;
+    var argon2Salt = json;
+    if (json['Argon2'] != null) {
+      argon2Params = json.value<JsonMap>('Argon2', 'params');
+      argon2Salt = json.value<JsonMap>('Argon2');
+    }
+
     return Argon2Details(
-      algorithm: json.value<String>('algorithm'),
-      version: int.parse(json['version'].toString()),
-      mCost: json.value<int>('m_cost'),
-      tCost: json.value<int>('t_cost'),
-      pCost: json.value<int>('p_cost'),
-      saltAes: json.value<String>('salt_aes'),
-      saltHmac: json.value<String>('salt_hmac'),
+      algorithm: argon2Params.value<String>('algorithm'),
+      version: int.parse(argon2Params['version'].toString()),
+      mCost: argon2Params.value<int>('m_cost'),
+      tCost: argon2Params.value<int>('t_cost'),
+      pCost: argon2Params.value<int>('p_cost'),
+      saltAes: argon2Salt.value<String>('salt_aes'),
+      saltHmac: argon2Salt.value<String>('salt_hmac'),
     );
   }