feat(useragent::evm): basic list & creation

useragent/lib/providers/evm.dart

@@ -1,23 +1,40 @@
+import 'package:arbiter/features/connection/connection.dart';
 import 'package:arbiter/proto/evm.pb.dart';
-import 'package:arbiter/proto/user_agent.pb.dart';
 import 'package:arbiter/providers/connection/connection_manager.dart';
-import 'package:protobuf/well_known_types/google/protobuf/empty.pb.dart';
 import 'package:riverpod_annotation/riverpod_annotation.dart';
 
 part 'evm.g.dart';
 
 @riverpod
 class Evm extends _$Evm {
+  @override
   Future<List<WalletEntry>?> build() async {
     final connection = await ref.watch(connectionManagerProvider.future);
     if (connection == null) {
       return null;
     }
 
-    await connection.send(UserAgentRequest(
-      evmWalletList: Empty()
-    ));
+    return listEvmWallets(connection);
+  }
 
-    final response = await connection.receive();
+  Future<void> refreshWallets() async {
+    final connection = await ref.read(connectionManagerProvider.future);
+    if (connection == null) {
+      state = const AsyncData(null);
+      return;
+    }
+
+    state = const AsyncLoading();
+    state = await AsyncValue.guard(() => listEvmWallets(connection));
+  }
+
+  Future<void> createWallet() async {
+    final connection = await ref.read(connectionManagerProvider.future);
+    if (connection == null) {
+      throw Exception('Not connected to the server.');
+    }
+
+    await createEvmWallet(connection);
+    state = await AsyncValue.guard(() => listEvmWallets(connection));
   }
 }