Label existing scam tokens (#2164)

* label existing scam tokens because users can get scammed twice ¯\_(ツ)_/¯

* minor ui fix [skip ci]

cw_core/lib/erc20_token.dart

@@ -17,11 +17,11 @@ class Erc20Token extends CryptoCurrency with HiveObjectMixin {
   @HiveField(4, defaultValue: true)
   bool _enabled;
   @HiveField(5)
-  final String? iconPath;
+  String? iconPath;
   @HiveField(6)
   final String? tag;
   @HiveField(7, defaultValue: false)
-  final bool isPotentialScam;
+  bool isPotentialScam;
 
   bool get enabled => _enabled;
 

cw_ethereum/lib/ethereum_wallet.dart

@@ -76,9 +76,13 @@ class EthereumWallet extends EVMChainWallet {
     await erc20TokensBox.deleteFromDisk();
 
     // Add all the previous tokens with configs to the new box
-    evmChainErc20TokensBox.addAll(allValues);
+    await evmChainErc20TokensBox.addAll(allValues);
   }
 
+  @override
+  List<String> get getDefaultTokenContractAddresses =>
+      DefaultEthereumErc20Tokens().initialErc20Tokens.map((e) => e.contractAddress).toList();
+
   @override
   EVMChainTransactionInfo getTransactionInfo(
       EVMChainTransactionModel transactionModel, String address) {

cw_evm/lib/evm_chain_wallet.dart

@@ -144,6 +144,8 @@ abstract class EVMChainWalletBase
   //   required WalletInfo walletInfo,
   // });
 
+  List<String> get getDefaultTokenContractAddresses;
+
   Future<void> initErc20TokensBox();
 
   String getTransactionHistoryFileName();
@@ -171,6 +173,9 @@ abstract class EVMChainWalletBase
     await walletAddresses.init();
     await transactionHistory.init();
 
+    // check for Already existing scam tokens, cuz users can get scammed twice ¯\_(ツ)_/¯
+    await _checkForExistingScamTokens();
+
     if (walletInfo.isHardwareWallet) {
       _evmChainPrivateKey = EvmLedgerCredentials(walletInfo.address);
       walletAddresses.address = walletInfo.address;
@@ -186,6 +191,31 @@ abstract class EVMChainWalletBase
     await save();
   }
 
+  Future<void> _checkForExistingScamTokens() async {
+    final baseCurrencySymbols = CryptoCurrency.all.map((e) => e.title.toUpperCase()).toList();
+
+    for (var token in erc20Currencies) {
+      bool isPotentialScam = false;
+
+      bool isWhitelisted =
+          getDefaultTokenContractAddresses.any((element) => element == token.contractAddress);
+
+      final tokenSymbol = token.title.toUpperCase();
+
+      // check if the token symbol is the same as any of the base currencies symbols (ETH, SOL, POL, TRX, etc):
+      // if it is, then it's probably a scam unless it's in the whitelist
+      if (baseCurrencySymbols.contains(tokenSymbol.trim().toUpperCase()) && !isWhitelisted) {
+        isPotentialScam = true;
+      }
+
+      if (isPotentialScam) {
+        token.isPotentialScam = true;
+        token.iconPath = null;
+        await token.save();
+      }
+    }
+  }
+
   @override
   int calculateEstimatedFee(TransactionPriority priority, int? amount) {
     {

cw_polygon/lib/polygon_wallet.dart

@@ -49,6 +49,10 @@ class PolygonWallet extends EVMChainWallet {
     }
   }
 
+  @override
+  List<String> get getDefaultTokenContractAddresses =>
+      DefaultPolygonErc20Tokens().initialPolygonErc20Tokens.map((e) => e.contractAddress).toList();
+
   @override
   Future<bool> checkIfScanProviderIsEnabled() async {
     bool isPolygonScanEnabled = (await sharedPrefs.future).getBool("use_polygonscan") ?? true;

lib/src/screens/send/send_page.dart

@@ -98,7 +98,7 @@ class SendPage extends BasePage {
     return MergeSemantics(
       child: SizedBox(
         height: isMobileView ? 37 : 45,
-        width: isMobileView ? 47: 45,
+        width: isMobileView ? 47 : 45,
         child: ButtonTheme(
           minWidth: double.minPositive,
           child: Semantics(
@@ -397,7 +397,6 @@ class SendPage extends BasePage {
                           return LoadingPrimaryButton(
                             key: ValueKey('send_page_send_button_key'),
                             onPressed: () async {
-
                               //Request dummy node to get the focus out of the text fields
                               FocusScope.of(context).requestFocus(FocusNode());
 
@@ -507,7 +506,6 @@ class SendPage extends BasePage {
         Navigator.of(loadingBottomSheetContext!).pop();
       }
 
-
       if (state is FailureState) {
         WidgetsBinding.instance.addPostFrameCallback((_) {
           showPopUp<void>(
@@ -525,7 +523,6 @@ class SendPage extends BasePage {
       }
 
       if (state is IsExecutingState) {
-
         // wait a bit to avoid showing the loading dialog if transaction is failed
         await Future.delayed(const Duration(milliseconds: 300));
         final currentState = sendViewModel.state;
@@ -584,8 +581,6 @@ class SendPage extends BasePage {
         });
       }
 
-
-
       if (state is TransactionCommitted) {
         WidgetsBinding.instance.addPostFrameCallback((_) async {
           if (!context.mounted) {
@@ -594,7 +589,8 @@ class SendPage extends BasePage {
 
           newContactAddress = newContactAddress ?? sendViewModel.newContactAddress();
 
-          if (newContactAddress?.address != null && isRegularElectrumAddress(newContactAddress!.address)) {
+          if (newContactAddress?.address != null &&
+              isRegularElectrumAddress(newContactAddress!.address)) {
             newContactAddress = null;
           }
 
@@ -611,25 +607,27 @@ class SendPage extends BasePage {
                       onCheckboxChanged: (value) => sendViewModel.setShowAddressBookPopup(!value),
                       titleText: S.of(bottomSheetContext).transaction_sent,
                       contentImage: 'assets/images/contact_icon.svg',
-                contentImageColor: Theme.of(context)
-                    .extension<CakeTextTheme>()!
-                    .titleColor,
+                      contentImageColor: Theme.of(context).extension<CakeTextTheme>()!.titleColor,
                       content: S.of(bottomSheetContext).add_contact_to_address_book,
                       isTwoAction: true,
                       leftButtonText: 'No',
                       rightButtonText: 'Yes',
                       actionLeftButton: () {
                         Navigator.of(bottomSheetContext).pop();
+                        if (context.mounted) {
                           Navigator.of(context)
                               .pushNamedAndRemoveUntil(Routes.dashboard, (route) => false);
+                        }
                         RequestReviewHandler.requestReview();
                         newContactAddress = null;
                       },
                       actionRightButton: () {
                         Navigator.of(bottomSheetContext).pop();
                         RequestReviewHandler.requestReview();
-                  Navigator.of(context)
-                      .pushNamed(Routes.addressBookAddContact, arguments: newContactAddress);
+                        if (context.mounted) {
+                          Navigator.of(context).pushNamed(Routes.addressBookAddContact,
+                              arguments: newContactAddress);
+                        }
                         newContactAddress = null;
                       },
                     )
@@ -641,8 +639,10 @@ class SendPage extends BasePage {
                       actionButtonKey: ValueKey('send_page_sent_dialog_ok_button_key'),
                       actionButton: () {
                         Navigator.of(bottomSheetContext).pop();
+                        if (context.mounted) {
                           Navigator.of(context)
                               .pushNamedAndRemoveUntil(Routes.dashboard, (route) => false);
+                        }
                         RequestReviewHandler.requestReview();
                         newContactAddress = null;
                       },
@@ -678,8 +678,7 @@ class SendPage extends BasePage {
               currentTheme: currentTheme,
               titleText: S.of(bottomSheetContext).proceed_on_device,
               contentImage: 'assets/images/hardware_wallet/ledger_nano_x.png',
-              contentImageColor:
-              Theme.of(context).extension<CakeTextTheme>()!.titleColor,
+              contentImageColor: Theme.of(context).extension<CakeTextTheme>()!.titleColor,
               content: S.of(bottomSheetContext).proceed_on_device_description,
               isTwoAction: false,
               actionButtonText: S.of(context).cancel,
@@ -778,5 +777,4 @@ class SendPage extends BasePage {
 
     return isValid;
   }
-
 }