CW-1368: Add Binance Smart Chain (#2836)

* feat: Add Binance Smart Chain support to wallet types and EVM chain registry

* feat: Add BSC node list and support in wallet type and chain ID mappings

* feat: Add BSC default tokens and update evm utility functions

* feat: Integrate BSC support in node settings and management

* feat: Add BSC support to config scripts and wallet type generation

* feat: Add BSC support to EVM chain ID and switcher

* feat: Extend BSC support in wallet utilities and chain type checks

* feat: Add BSC support to different wallet functions

* feat: Add BSCURI class and implement for uri handling

* feat: Update Android and iOS configurations to support BSC URL schemes

* feat: Add BSC support to different functionalities and settings

* refactor: Update wallet type name from'Binance Smart Chain' to BNB Smart Chain

* feat: Add switcher icon and updates token utils

* Review fixes

* More changes to BSC name, wallet listing and images

* Add more default tokens

lib/src/screens/dashboard/desktop_widgets/desktop_wallet_selection_dropdown.dart

@@ -41,6 +41,7 @@ class _DesktopWalletSelectionDropDownState extends State<DesktopWalletSelectionD
   final bitcoinCashIcon = Image.asset('assets/images/crypto/bitcoin-cash.webp', height: 24, width: 24);
   final baseIcon = Image.asset('assets/images/crypto/base_icon.webp', height: 24, width: 24);
   final arbitrumIcon = Image.asset('assets/images/crypto/arbitrum.webp', height: 24, width: 24);
+  final bscIcon = Image.asset('assets/images/crypto/BNB.webp', height: 24, width: 24);
   final nanoIcon = Image.asset('assets/images/crypto/nano.webp', height: 24, width: 24);
   final bananoIcon = Image.asset('assets/images/crypto/nano.webp', height: 24, width: 24);
   final solanaIcon = Image.asset('assets/images/crypto/solana.webp', height: 24, width: 24);
@@ -192,6 +193,8 @@ class _DesktopWalletSelectionDropDownState extends State<DesktopWalletSelectionD
         return baseIcon;
       case WalletType.arbitrum:
         return arbitrumIcon;
+      case WalletType.bsc:
+        return bscIcon;
       case WalletType.zcash:
         return zcashIcon;
       case WalletType.none:

lib/src/screens/dashboard/widgets/menu_widget.dart

@@ -5,7 +5,6 @@ import 'package:flutter/material.dart';
 import 'package:cake_wallet/view_model/dashboard/dashboard_view_model.dart';
 import 'package:cw_core/wallet_type.dart';
 import 'package:flutter_mobx/flutter_mobx.dart';
-import 'package:flutter_svg/svg.dart';
 
 class MenuWidget extends StatefulWidget {
   MenuWidget(this.dashboardViewModel, Key? key);
@@ -36,6 +35,7 @@ class MenuWidgetState extends State<MenuWidget> {
         this.polygonIcon = Image.asset('assets/images/crypto/polygon.webp'),
         this.baseIcon = Image.asset('assets/images/crypto/base_icon.webp'),
         this.arbitrumIcon = Image.asset('assets/images/crypto/arbitrum.webp'),
+        this.bscIcon = Image.asset('assets/images/crypto/BNB.webp'),
         this.solanaIcon = Image.asset('assets/images/crypto/solana.webp'),
         this.tronIcon = Image.asset('assets/images/crypto/tron.webp'),
         this.wowneroIcon = Image.asset('assets/images/crypto/wownero.webp'),
@@ -66,6 +66,7 @@ class MenuWidgetState extends State<MenuWidget> {
   Image polygonIcon;
   Image baseIcon;
   Image arbitrumIcon;
+  Image bscIcon;
   Image solanaIcon;
   Image tronIcon;
   Image wowneroIcon;
@@ -258,6 +259,8 @@ class MenuWidgetState extends State<MenuWidget> {
         return baseIcon;
       case WalletType.arbitrum:
         return arbitrumIcon;
+      case WalletType.bsc:
+        return bscIcon;
       case WalletType.tron:
         return tronIcon;
       case WalletType.wownero:

lib/src/screens/settings/privacy_page.dart

@@ -142,6 +142,14 @@ class PrivacyPage extends BasePage {
                     _privacySettingsViewModel.setUseArbiScan(value);
                   },
                 ),
+              if (_privacySettingsViewModel.canUseBscScan)
+                SettingsSwitcherCell(
+                  title: S.current.bscscan_history,
+                  value: _privacySettingsViewModel.useBscScan,
+                  onValueChange: (BuildContext _, bool value) {
+                    _privacySettingsViewModel.setUseBscScan(value);
+                  },
+                ),
               if (_privacySettingsViewModel.canUseTronGrid)
                 SettingsSwitcherCell(
                   title: S.current.trongrid_history,

lib/src/screens/wallet_connect/services/chain_service/eth/evm_chain_id.dart

@@ -5,6 +5,7 @@ enum EVMChainId {
   polygon,
   base,
   arbitrum,
+  bsc,
 }
 
 extension EVMChainIdX on EVMChainId {
@@ -22,6 +23,7 @@ extension EVMChainIdX on EVMChainId {
       EVMChainId.polygon => 137,
       EVMChainId.base => 8453,
       EVMChainId.arbitrum => 42161,
+      EVMChainId.bsc => 56,
     };
   }
 

lib/src/screens/wallet_connect/services/key_service/wallet_connect_key_service.dart

@@ -22,6 +22,7 @@ class KeyServiceImpl implements WalletConnectKeyService {
       case WalletType.polygon:
       case WalletType.base:
       case WalletType.arbitrum:
+      case WalletType.bsc:
         return evm!.getPrivateKey(wallet);
       case WalletType.solana:
         return solana!.getPrivateKey(wallet);
@@ -36,6 +37,7 @@ class KeyServiceImpl implements WalletConnectKeyService {
       case WalletType.polygon:
       case WalletType.base:
       case WalletType.arbitrum:
+      case WalletType.bsc:
         return evm!.getPublicKey(wallet);
       case WalletType.solana:
         return solana!.getPublicKey(wallet);

lib/src/widgets/evm_switcher.dart

@@ -14,52 +14,26 @@ class EvmSwitcherDataItem {
     required this.svgPath,
     required this.chainId,
   });
-
-  static const ethereum = EvmSwitcherDataItem(
-    name: 'Ethereum',
-    svgPath: 'assets/images/evm_switcher_icons/ethereum.svg',
-    chainId: 1,
-  );
-
-  static const polygon = EvmSwitcherDataItem(
-    name: 'Polygon',
-    svgPath: 'assets/images/evm_switcher_icons/polygon.svg',
-    chainId: 137,
-  );
-
-  static const arbitrum = EvmSwitcherDataItem(
-    name: 'Arbitrum',
-    svgPath: 'assets/images/evm_switcher_icons/arbitrum.svg',
-    chainId: 42161,
-  );
-
-  static const base = EvmSwitcherDataItem(
-    name: 'Base',
-    svgPath: 'assets/images/evm_switcher_icons/base.svg',
-    chainId: 8453,
-  );
-
-  static const items = [
-    ethereum,
-    polygon,
-    arbitrum,
-    base,
-  ];
 }
 
 String _getSvgPathForChain(String chainName) {
   final name = chainName.toLowerCase();
-  if (name.contains('ethereum')) {
-    return 'assets/images/evm_switcher_icons/ethereum.svg';
-  } else if (name.contains('polygon')) {
-    return 'assets/images/evm_switcher_icons/polygon.svg';
-  } else if (name.contains('arbitrum')) {
-    return 'assets/images/evm_switcher_icons/arbitrum.svg';
-  } else if (name.contains('base')) {
-    return 'assets/images/evm_switcher_icons/base.svg';
+
+  switch (name) {
+    case 'ethereum':
+      return 'assets/images/crypto/ethereum.webp';
+    case 'polygon':
+      return 'assets/images/crypto/polygon.webp';
+    case 'arbitrum':
+      return 'assets/images/crypto/arbitrum.webp';
+    case 'base':
+      return 'assets/images/crypto/base_icon.webp';
+    case 'bnb':
+    case 'bsc':
+      return 'assets/images/crypto/BNB.webp';
+    default:
+      return 'assets/images/crypto/ethereum.webp';
   }
-  // Default to ethereum if unknown
-  return 'assets/images/evm_switcher_icons/ethereum.svg';
 }
 
 class EvmSwitcher extends StatefulWidget {

lib/src/widgets/evm_switcher_row.dart

@@ -1,7 +1,7 @@
+import 'package:cake_wallet/src/widgets/cake_image_widget.dart';
 import 'package:cake_wallet/src/widgets/evm_switcher.dart';
 import 'package:cake_wallet/src/widgets/standard_switch.dart';
 import 'package:flutter/material.dart';
-import 'package:flutter_svg/flutter_svg.dart';
 
 class EvmSwitcherRow extends StatelessWidget {
   const EvmSwitcherRow({
@@ -45,23 +45,24 @@ class EvmSwitcherRow extends StatelessWidget {
               Row(
                 spacing: 8.0,
                 children: [
-                  SvgPicture.asset(
-                    data.svgPath,
+                  CakeImageWidget(
+                    imageUrl: data.svgPath,
                     width: 16,
                     height: 16,
-                    colorFilter: ColorFilter.mode(
-                        resolvedForegroundColor, BlendMode.srcIn),
                   ),
-                  Text(data.name,
-                      style: TextStyle(
-                          color: resolvedForegroundColor, fontSize: 14)),
+                  Text(
+                    data.name,
+                    style: TextStyle(color: resolvedForegroundColor, fontSize: 14),
+                  ),
                   if (selected && !editMode)
-                    SvgPicture.asset("assets/images/evm_switcher_checkmark.svg",
-                        width: 18, height: 18),
+                    CakeImageWidget(
+                      imageUrl: "assets/images/evm_switcher_checkmark.svg",
+                      width: 18,
+                      height: 18,
+                    ),
                 ],
               ),
-              if (editMode)
-                StandardSwitch(value: editSwitchValue, onTapped: onTap)
+              if (editMode) StandardSwitch(value: editSwitchValue, onTapped: onTap)
             ],
           ),
         ),