Fixes for 'std::bad_alloc' issue.

cw_monero/ios/Classes/monero_api.cpp

@@ -294,14 +294,26 @@ extern "C"
         return true;
     }
 
-    void load_wallet(char *path, char *password, int32_t nettype)
+    bool load_wallet(char *path, char *password, int32_t nettype)
     {
         nice(19);
         Monero::NetworkType networkType = static_cast<Monero::NetworkType>(nettype);
-        Monero::Wallet *wallet = Monero::WalletManagerFactory::getWalletManager()->openWallet(std::string(path), std::string(password), networkType);
+        Monero::WalletManager *walletManager = Monero::WalletManagerFactory::getWalletManager();
+        Monero::Wallet *wallet = walletManager->openWallet(std::string(path), std::string(password), networkType);
+        int status;
+        std::string errorString;
+
+        wallet->statusWithErrorString(status, errorString);
         change_current_wallet(wallet);
+
+        return !(status != Monero::Wallet::Status_Ok || !errorString.empty());
     }
 
+    char *error_string() {
+        return strdup(get_current_wallet()->errorString().c_str());
+    }
+
+
     bool is_wallet_exist(char *path)
     {
         return Monero::WalletManagerFactory::getWalletManager()->walletExists(std::string(path));

cw_monero/lib/exceptions/wallet_loading_exception.dart

@@ -0,0 +1,8 @@
+class WalletLoadingException implements Exception {
+  WalletLoadingException({this.message});
+
+  final String message;
+
+  @override
+  String toString() => message;
+}

cw_monero/lib/signatures.dart

@@ -14,7 +14,9 @@ typedef restore_wallet_from_keys = Int8 Function(Pointer<Utf8>, Pointer<Utf8>,
 
 typedef is_wallet_exist = Int8 Function(Pointer<Utf8>);
 
-typedef load_wallet = Void Function(Pointer<Utf8>, Pointer<Utf8>, Int8);
+typedef load_wallet = Int8 Function(Pointer<Utf8>, Pointer<Utf8>, Int8);
+
+typedef error_string = Pointer<Utf8> Function();
 
 typedef get_filename = Pointer<Utf8> Function();
 

cw_monero/lib/types.dart

@@ -14,7 +14,9 @@ typedef RestoreWalletFromKeys = int Function(Pointer<Utf8>, Pointer<Utf8>,
 
 typedef IsWalletExist = int Function(Pointer<Utf8>);
 
-typedef LoadWallet = void Function(Pointer<Utf8>, Pointer<Utf8>, int);
+typedef LoadWallet = int Function(Pointer<Utf8>, Pointer<Utf8>, int);
+
+typedef ErrorString = Pointer<Utf8> Function();
 
 typedef GetFilename = Pointer<Utf8> Function();
 

cw_monero/lib/wallet_manager.dart

@@ -7,6 +7,7 @@ import 'package:cw_monero/signatures.dart';
 import 'package:cw_monero/types.dart';
 import 'package:cw_monero/monero_api.dart';
 import 'package:cw_monero/exceptions/wallet_creation_exception.dart';
+import 'package:cw_monero/exceptions/wallet_loading_exception.dart';
 import 'package:cw_monero/exceptions/wallet_restore_from_keys_exception.dart';
 import 'package:cw_monero/exceptions/wallet_restore_from_seed_exception.dart';
 
@@ -32,6 +33,10 @@ final loadWalletNative = moneroApi
     .lookup<NativeFunction<load_wallet>>('load_wallet')
     .asFunction<LoadWallet>();
 
+final errorStringNative = moneroApi
+    .lookup<NativeFunction<error_string>>('error_string')
+    .asFunction<ErrorString>();
+
 void createWalletSync(
     {String path, String password, String language, int nettype = 0}) {
   final pathPointer = Utf8.toUtf8(path);
@@ -136,10 +141,14 @@ void restoreWalletFromKeysSync(
 void loadWallet({String path, String password, int nettype = 0}) {
   final pathPointer = Utf8.toUtf8(path);
   final passwordPointer = Utf8.toUtf8(password);
-
-  loadWalletNative(pathPointer, passwordPointer, nettype);
+  final loaded = loadWalletNative(pathPointer, passwordPointer, nettype) != 0;
   free(pathPointer);
   free(passwordPointer);
+
+  if (!loaded) {
+    throw WalletLoadingException(
+        message: convertUTF8ToString(pointer: errorStringNative()));
+  }
 }
 
 void _createWallet(Map<String, dynamic> args) {