integration test added

example/integration_test /full_cycle_test.dart

@@ -0,0 +1,63 @@
+import 'dart:typed_data';
+
+import 'package:bdk_flutter/bdk_flutter.dart';
+import 'package:flutter/foundation.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:integration_test/integration_test.dart';
+
+void main() {
+  IntegrationTestWidgetsFlutterBinding.ensureInitialized();
+  group('Descriptor & Wallet', () {
+    setUp(() async {});
+    testWidgets('generating psbt using a muti-sig wallet', (_) async {
+      final externalDescriptor = await Descriptor.create(
+          descriptor:
+              "wsh(thresh(2,pk(tpubD6NzVbkrYhZ4XJBfEJ6gt9DiVdfWJijsQTCE3jtXByW3Tk6AVGQ3vL1NNxg3SjB7QkJAuutACCQjrXD8zdZSM1ZmBENszCqy49ECEHmD6rf/0/*),sj:and_v(v:pk(tpubD6NzVbkrYhZ4YfAr3jCBRk4SpqB9L1Hh442y83njwfMaker7EqZd7fHMqyTWrfRYJ1e5t2ue6BYjW5i5yQnmwqbzY1a3kfqNxog1AFcD1aE/0/*),n:older(6)),snj:and_v(v:pk(tprv8ZgxMBicQKsPeitVUz3s6cfyCECovNP7t82FaKPa4UKqV1kssWcXgLkMDjzDbgG9GWoza4pL7z727QitfzkiwX99E1Has3T3a1MKHvYWmQZ/0/*),after(630000))))",
+          network: Network.signet);
+      final internalDescriptor = await Descriptor.create(
+          descriptor:
+              "wsh(thresh(2,pk(tpubD6NzVbkrYhZ4XJBfEJ6gt9DiVdfWJijsQTCE3jtXByW3Tk6AVGQ3vL1NNxg3SjB7QkJAuutACCQjrXD8zdZSM1ZmBENszCqy49ECEHmD6rf/1/*),sj:and_v(v:pk(tpubD6NzVbkrYhZ4YfAr3jCBRk4SpqB9L1Hh442y83njwfMaker7EqZd7fHMqyTWrfRYJ1e5t2ue6BYjW5i5yQnmwqbzY1a3kfqNxog1AFcD1aE/1/*),n:older(6)),snj:and_v(v:pk(tprv8ZgxMBicQKsPeitVUz3s6cfyCECovNP7t82FaKPa4UKqV1kssWcXgLkMDjzDbgG9GWoza4pL7z727QitfzkiwX99E1Has3T3a1MKHvYWmQZ/1/*),after(630000))))",
+          network: Network.signet);
+
+      final wallet = await Wallet.create(
+          descriptor: externalDescriptor,
+          changeDescriptor: internalDescriptor,
+          network: Network.signet,
+          databaseConfig: const DatabaseConfig.memory());
+      final blockchain = await Blockchain.createMutinynet();
+      wallet.sync(blockchain: blockchain);
+      debugPrint("Wallet balance: ${wallet.getBalance().total}");
+      final toAddress = wallet
+          .getAddress(addressIndex: const AddressIndex.increase())
+          .address;
+      debugPrint("Wallet address: ${toAddress.toString()}");
+      final externalWalletPolicy = wallet.policies(KeychainKind.externalChain);
+      final ineternalWalletPolicy = wallet.policies(KeychainKind.internalChain);
+      if (externalWalletPolicy != null && ineternalWalletPolicy != null) {
+        // Construct external and internal policy paths
+        final extPath = {
+          ineternalWalletPolicy.id(): Uint32List.fromList([0, 1])
+        };
+        debugPrint("External Policy path: $extPath\n");
+
+        final intPath = {
+          ineternalWalletPolicy.id(): Uint32List.fromList([0, 1])
+        };
+        debugPrint("Internal Policy Path: $intPath\n");
+
+        // Build the transaction
+        final txBuilder = TxBuilder()
+            .addRecipient(
+              toAddress.scriptPubkey(),
+              BigInt.from(1000),
+            )
+            .doNotSpendChange()
+            .policyPath(KeychainKind.internalChain, intPath)
+            .policyPath(KeychainKind.externalChain, extPath);
+
+        final (psbt, _) = await txBuilder.finish(wallet);
+        debugPrint("Transaction serialized: ${psbt.toString()}\n");
+      }
+    });
+  });
+}

example/pubspec.lock

@@ -181,6 +181,11 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
+  flutter_driver:
+    dependency: "direct dev"
+    description: flutter
+    source: sdk
+    version: "0.0.0"
   flutter_lints:
     dependency: "direct dev"
     description:
@@ -210,6 +215,11 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.4.2"
+  fuchsia_remote_debug_protocol:
+    dependency: transitive
+    description: flutter
+    source: sdk
+    version: "0.0.0"
   glob:
     dependency: transitive
     description:
@@ -218,6 +228,11 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.1.2"
+  integration_test:
+    dependency: "direct dev"
+    description: flutter
+    source: sdk
+    version: "0.0.0"
   json_annotation:
     dependency: transitive
     description:
@@ -314,6 +329,22 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.9.0"
+  platform:
+    dependency: transitive
+    description:
+      name: platform
+      sha256: "9b71283fc13df574056616011fb138fd3b793ea47cc509c189a6c3fa5f8a1a65"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.1.5"
+  process:
+    dependency: transitive
+    description:
+      name: process
+      sha256: "21e54fd2faf1b5bdd5102afd25012184a6793927648ea81eea80552ac9405b32"
+      url: "https://pub.dev"
+    source: hosted
+    version: "5.0.2"
   pub_semver:
     dependency: transitive
     description:
@@ -375,6 +406,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.2.0"
+  sync_http:
+    dependency: transitive
+    description:
+      name: sync_http
+      sha256: "7f0cd72eca000d2e026bcd6f990b81d0ca06022ef4e32fb257b30d3d1014a961"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.3.1"
   term_glyph:
     dependency: transitive
     description:
@@ -439,6 +478,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "0.5.1"
+  webdriver:
+    dependency: transitive
+    description:
+      name: webdriver
+      sha256: "003d7da9519e1e5f329422b36c4dcdf18d7d2978d1ba099ea4e45ba490ed845e"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.0.3"
   yaml:
     dependency: transitive
     description:

example/pubspec.yaml

@@ -32,7 +32,10 @@ dependencies:
 dev_dependencies:
   flutter_test:
     sdk: flutter
-
+  integration_test:
+    sdk: flutter
+  flutter_driver:
+    sdk: flutter 
   # The "flutter_lints" package below contains a set of recommended lints to
   # encourage good coding practices. The lint set provided by the package is
   # activated in the `analysis_options.yaml` file located at the root of your