Enable prefer_const_constructors lint and apply across all packages

packages/pos_client/analysis_options.yaml

@@ -1,4 +1,46 @@
-include: package:flutter_lints/flutter.yaml
+# This file configures the analyzer, which statically analyzes Dart code to
+# check for errors, warnings, and lints.
+#
+# The issues identified by the analyzer are surfaced in the UI of Dart-enabled
+# IDEs (https://dart.dev/tools#ides-and-editors). The analyzer can also be
+# invoked from the command line by running `flutter analyze`.
 
+# The following line activates a set of recommended lints for Flutter apps,
+# packages, and plugins designed to encourage good coding practices.
+include: package:lints/recommended.yaml
+
+linter:
+  # The lint rules applied to this project can be customized in the
+  # section below to disable rules from the `package:flutter_lints/flutter.yaml`
+  # included above or to enable additional rules. A list of all available lints
+  # and their documentation is published at
+  # https://dart-lang.github.io/linter/lints/index.html.
+  #
+  # Instead of disabling a lint rule for the entire project in the
+  # section below, it can also be suppressed for a single line of code
+  # or a specific dart file by using the `// ignore: name_of_lint` and
+  # `// ignore_for_file: name_of_lint` syntax on the line or in the file
+  # producing the lint.
+  rules:
+    non_constant_identifier_names: false
+    constant_identifier_names: false
+    avoid_print: true
+    prefer_single_quotes: true
+    sort_pub_dependencies: true
+    avoid_unnecessary_containers: true
+    cancel_subscriptions: true
+    prefer_const_constructors: true
+    prefer_const_literals_to_create_immutables: true
+    avoid_field_initializers_in_const_classes: true
+
+analyzer:
+  exclude:
+    - '**.freezed.dart'
+    - '**.g.dart'
+    - '**/*.freezed.dart'
+    - '**/*.g.dart'
+    - '**/generated_plugin_registrant.dart'
+  errors:
+    invalid_annotation_target: ignore
 # Additional information about this file can be found at
 # https://dart.dev/guides/language/analysis-options

packages/pos_client/example/analysis_options.yaml

@@ -7,22 +7,40 @@
 
 # The following line activates a set of recommended lints for Flutter apps,
 # packages, and plugins designed to encourage good coding practices.
-include: package:flutter_lints/flutter.yaml
+include: package:lints/recommended.yaml
 
 linter:
   # The lint rules applied to this project can be customized in the
   # section below to disable rules from the `package:flutter_lints/flutter.yaml`
   # included above or to enable additional rules. A list of all available lints
-  # and their documentation is published at https://dart.dev/lints.
+  # and their documentation is published at
+  # https://dart-lang.github.io/linter/lints/index.html.
   #
   # Instead of disabling a lint rule for the entire project in the
   # section below, it can also be suppressed for a single line of code
   # or a specific dart file by using the `// ignore: name_of_lint` and
   # `// ignore_for_file: name_of_lint` syntax on the line or in the file
   # producing the lint.
   rules:
-    # avoid_print: false  # Uncomment to disable the `avoid_print` rule
-    # prefer_single_quotes: true  # Uncomment to enable the `prefer_single_quotes` rule
+    non_constant_identifier_names: false
+    constant_identifier_names: false
+    avoid_print: true
+    prefer_single_quotes: true
+    sort_pub_dependencies: true
+    avoid_unnecessary_containers: true
+    cancel_subscriptions: true
+    prefer_const_constructors: true
+    # prefer_const_literals_to_create_immutables: true
+    avoid_field_initializers_in_const_classes: true
 
+analyzer:
+  exclude:
+    - '**.freezed.dart'
+    - '**.g.dart'
+    - '**/*.freezed.dart'
+    - '**/*.g.dart'
+    - '**/generated_plugin_registrant.dart'
+  errors:
+    invalid_annotation_target: ignore
 # Additional information about this file can be found at
 # https://dart.dev/guides/language/analysis-options

packages/pos_client/example/lib/main.dart

@@ -4,7 +4,7 @@ import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:flutter/foundation.dart' show kIsWeb;
 
 void main() {
-  runApp(ProviderScope(child: const MyApp()));
+  runApp(const ProviderScope(child: MyApp()));
 }
 
 class MyApp extends StatelessWidget {

packages/pos_client/example/lib/providers/available_tokens_provider.dart

@@ -196,55 +196,61 @@ enum SupportedNetwork {
   PosNetwork get posNetwork {
     switch (this) {
       case SupportedNetwork.ethereum:
-        return PosNetwork(name: 'Ethereum', chainId: 'eip155:1');
+        return const PosNetwork(name: 'Ethereum', chainId: 'eip155:1');
       case SupportedNetwork.polygon:
-        return PosNetwork(name: 'Polygon', chainId: 'eip155:137');
+        return const PosNetwork(name: 'Polygon', chainId: 'eip155:137');
       case SupportedNetwork.binanceSmartChain:
-        return PosNetwork(name: 'BNB Smart Chain', chainId: 'eip155:56');
+        return const PosNetwork(name: 'BNB Smart Chain', chainId: 'eip155:56');
       case SupportedNetwork.avalanche:
-        return PosNetwork(name: 'Avalanche', chainId: 'eip155:43114');
+        return const PosNetwork(name: 'Avalanche', chainId: 'eip155:43114');
       case SupportedNetwork.arbitrum:
-        return PosNetwork(name: 'Arbitrum One', chainId: 'eip155:42161');
+        return const PosNetwork(name: 'Arbitrum One', chainId: 'eip155:42161');
       case SupportedNetwork.optimism:
-        return PosNetwork(name: 'Optimism', chainId: 'eip155:10');
+        return const PosNetwork(name: 'Optimism', chainId: 'eip155:10');
       case SupportedNetwork.base:
-        return PosNetwork(name: 'Base', chainId: 'eip155:8453');
+        return const PosNetwork(name: 'Base', chainId: 'eip155:8453');
       case SupportedNetwork.fantom:
-        return PosNetwork(name: 'Fantom', chainId: 'eip155:250');
+        return const PosNetwork(name: 'Fantom', chainId: 'eip155:250');
       case SupportedNetwork.cronos:
-        return PosNetwork(name: 'Cronos', chainId: 'eip155:25');
+        return const PosNetwork(name: 'Cronos', chainId: 'eip155:25');
       case SupportedNetwork.polygonZkEVM:
-        return PosNetwork(name: 'Polygon zkEVM', chainId: 'eip155:1101');
+        return const PosNetwork(name: 'Polygon zkEVM', chainId: 'eip155:1101');
       case SupportedNetwork.sepolia:
-        return PosNetwork(name: 'Sepolia ETH', chainId: 'eip155:11155111');
+        return const PosNetwork(
+          name: 'Sepolia ETH',
+          chainId: 'eip155:11155111',
+        );
       case SupportedNetwork.gnosis:
-        return PosNetwork(name: 'Gnosis Chain', chainId: 'eip155:100');
+        return const PosNetwork(name: 'Gnosis Chain', chainId: 'eip155:100');
       case SupportedNetwork.zkSyncEra:
-        return PosNetwork(name: 'zkSync Era', chainId: 'eip155:324');
+        return const PosNetwork(name: 'zkSync Era', chainId: 'eip155:324');
       case SupportedNetwork.mantle:
-        return PosNetwork(name: 'Mantle', chainId: 'eip155:5000');
+        return const PosNetwork(name: 'Mantle', chainId: 'eip155:5000');
       case SupportedNetwork.klaytn:
-        return PosNetwork(name: 'Klaytn Mainnet', chainId: 'eip155:8217');
+        return const PosNetwork(name: 'Klaytn Mainnet', chainId: 'eip155:8217');
       case SupportedNetwork.celo:
-        return PosNetwork(name: 'Celo', chainId: 'eip155:42220');
+        return const PosNetwork(name: 'Celo', chainId: 'eip155:42220');
       case SupportedNetwork.linea:
-        return PosNetwork(name: 'Linea', chainId: 'eip155:59144');
+        return const PosNetwork(name: 'Linea', chainId: 'eip155:59144');
       case SupportedNetwork.baseSepolia:
-        return PosNetwork(name: 'Base Sepolia', chainId: 'eip155:84531');
+        return const PosNetwork(name: 'Base Sepolia', chainId: 'eip155:84531');
       case SupportedNetwork.solana:
-        return PosNetwork(
+        return const PosNetwork(
           name: 'Solana',
           chainId: 'solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp',
         );
       case SupportedNetwork.solanaDevnet:
-        return PosNetwork(
+        return const PosNetwork(
           name: 'Solana Devnet',
           chainId: 'solana:EtWTRABZaYq6iMfeYKouRu166VU2xqa1',
         );
       case SupportedNetwork.tron:
-        return PosNetwork(name: 'Tron', chainId: 'tron:0x2b6653dc');
+        return const PosNetwork(name: 'Tron', chainId: 'tron:0x2b6653dc');
       case SupportedNetwork.tronTestnet:
-        return PosNetwork(name: 'Tron Testnet', chainId: 'tron:0xcd8690dc');
+        return const PosNetwork(
+          name: 'Tron Testnet',
+          chainId: 'tron:0xcd8690dc',
+        );
     }
   }
 }

packages/pos_client/example/lib/providers/pos_client_provider.dart

@@ -4,15 +4,15 @@ import 'package:pos_client/pos_client.dart';
 /// Reown POS plugin instance
 final posClilentProvider = Provider<IPosClient>((ref) {
   // [PosClient SDK API] 1. Construct your RoenPos instance
-  final metadata = Metadata(
+  final metadata = const Metadata(
     merchantName: 'DTC Pay',
     description: 'Secure Crypto Payment Terminal',
     url: 'https://appkit-lab.reown.com',
     logoIcon: 'https://avatars.githubusercontent.com/u/179229932',
   );
   return PosClient(
     projectId: '50f81661a58229027394e0a19e9db752',
-    deviceId: "sample_pos_device_${DateTime.now().microsecondsSinceEpoch}",
+    deviceId: 'sample_pos_device_${DateTime.now().microsecondsSinceEpoch}',
     metadata: metadata,
   );
 });

packages/pos_client/example/lib/screens/amount_screen.dart

@@ -31,7 +31,7 @@ class _AmountScreenState extends ConsumerState<AmountScreen> {
   void _navigateToTokenScreen() {
     Navigator.push(
       context,
-      MaterialPageRoute(builder: (context) => TokenScreen()),
+      MaterialPageRoute(builder: (context) => const TokenScreen()),
     );
   }
 
@@ -171,7 +171,7 @@ class _AmountScreenState extends ConsumerState<AmountScreen> {
                         ),
                       ),
                       const SizedBox(height: 10),
-                      SizedBox(
+                      const SizedBox(
                         width: double.infinity,
                         height: 56,
                         child: DtcRestartButton(),
@@ -184,7 +184,7 @@ class _AmountScreenState extends ConsumerState<AmountScreen> {
           ),
         ),
       ),
-      bottomNavigationBar: DtcFooter(),
+      bottomNavigationBar: const DtcFooter(),
     );
   }
 }

packages/pos_client/example/lib/screens/network_screen.dart

@@ -45,7 +45,7 @@ class _NetworkScreenState extends ConsumerState<NetworkScreen> {
           return AlertDialog(
             title: Text('${event.runtimeType}'),
             content: Text(event.message),
-            actions: [DtcRestartButton()],
+            actions: [const DtcRestartButton()],
           );
         },
       );
@@ -59,7 +59,7 @@ class _NetworkScreenState extends ConsumerState<NetworkScreen> {
     posInstance.createPaymentIntent(paymentIntents: [paymentInfo]);
     Navigator.push(
       context,
-      MaterialPageRoute(builder: (context) => PaymentScreen()),
+      MaterialPageRoute(builder: (context) => const PaymentScreen()),
     );
   }
 
@@ -165,15 +165,15 @@ class _NetworkScreenState extends ConsumerState<NetworkScreen> {
                                   trailing:
                                       network.chainId ==
                                           paymentInfo.token.network.chainId
-                                      ? Icon(Icons.check)
+                                      ? const Icon(Icons.check)
                                       : null,
                                 ),
                               ),
                             );
                           },
                           itemCount: avaibleNetworks.length,
                           separatorBuilder: (BuildContext context, int index) {
-                            return SizedBox.square(dimension: 12.0);
+                            return const SizedBox.square(dimension: 12.0);
                           },
                         ),
                       ),
@@ -204,7 +204,7 @@ class _NetworkScreenState extends ConsumerState<NetworkScreen> {
                         ),
                       ),
                       const SizedBox(height: 10),
-                      SizedBox(
+                      const SizedBox(
                         width: double.infinity,
                         height: 56,
                         child: DtcRestartButton(),
@@ -217,7 +217,7 @@ class _NetworkScreenState extends ConsumerState<NetworkScreen> {
           ),
         ),
       ),
-      bottomNavigationBar: DtcFooter(),
+      bottomNavigationBar: const DtcFooter(),
     );
   }
 }

packages/pos_client/example/lib/screens/payment_screen.dart

@@ -59,7 +59,7 @@ class _PaymentScreenState extends ConsumerState<PaymentScreen> {
                   child: Column(
                     children: [
                       // Screen header
-                      DtcHeader(
+                      const DtcHeader(
                         title: 'Scan to Pay',
                         description: 'Step 5: Customer scans QR',
                       ),
@@ -92,7 +92,7 @@ class _PaymentScreenState extends ConsumerState<PaymentScreen> {
                       // Payment Details Card
                       _PaymentInfoWidget(),
                       const SizedBox(height: 24),
-                      SizedBox(
+                      const SizedBox(
                         width: double.infinity,
                         height: 56,
                         child: DtcRestartButton(),
@@ -105,7 +105,7 @@ class _PaymentScreenState extends ConsumerState<PaymentScreen> {
           ),
         ),
       ),
-      bottomNavigationBar: DtcFooter(),
+      bottomNavigationBar: const DtcFooter(),
     );
   }
 }
@@ -174,7 +174,7 @@ class __EventsListWidgetState extends ConsumerState<_EventsListWidget> {
   @override
   Widget build(BuildContext context) {
     if (_eventsPool.isEmpty) {
-      return SizedBox.shrink();
+      return const SizedBox.shrink();
     }
     final currentEvent = _eventsPool.last;
     return Column(
@@ -234,7 +234,7 @@ class __EventsListWidgetState extends ConsumerState<_EventsListWidget> {
         ),
         Visibility(
           visible: isLoading && !isFailed,
-          child: SizedBox.square(
+          child: const SizedBox.square(
             dimension: 8,
             child: CircularProgressIndicator(
               strokeWidth: 2.0,
@@ -247,7 +247,7 @@ class __EventsListWidgetState extends ConsumerState<_EventsListWidget> {
           child: Container(
             width: 10,
             height: 10,
-            decoration: BoxDecoration(
+            decoration: const BoxDecoration(
               color: Colors.red,
               shape: BoxShape.circle,
             ),
@@ -277,7 +277,7 @@ class __EventsListWidgetState extends ConsumerState<_EventsListWidget> {
         return AlertDialog(
           title: Text(title),
           content: Text(message),
-          actions: [DtcRestartButton()],
+          actions: [const DtcRestartButton()],
         );
       },
     );
@@ -293,7 +293,7 @@ class _PaymentInfoWidget extends ConsumerWidget {
         children: [
           Text(
             '\$${paymentInfo.amount}',
-            style: TextStyle(
+            style: const TextStyle(
               color: Colors.black,
               fontSize: 24,
               fontWeight: FontWeight.bold,
@@ -303,7 +303,7 @@ class _PaymentInfoWidget extends ConsumerWidget {
           const SizedBox(height: 8),
           Text(
             '${paymentInfo.token.symbol.toUpperCase()} on ${paymentInfo.token.network.name}',
-            style: TextStyle(
+            style: const TextStyle(
               color: Colors.black,
               fontSize: 16,
               fontWeight: FontWeight.normal,