Merge pull request #42 from kumulynja/add-default-ltbl-services

add Builder with testnet and mutinynet default services

lib/src/root.dart

@@ -1,5 +1,6 @@
 import 'package:ldk_node/src/generated/api/error.dart' as error;
 import 'package:ldk_node/src/generated/api/types.dart' as types;
+import 'package:ldk_node/src/utils/default_services.dart';
 import 'package:ldk_node/src/utils/utils.dart';
 import 'package:path_provider/path_provider.dart';
 
@@ -534,6 +535,30 @@ class Builder {
         probingLiquidityLimitMultiplier: 3));
   }
 
+  /// Creates a new builder instance with default services configured for testnet.
+  ///
+  factory Builder.testnet({types.Config? config}) {
+    final Builder builder =
+        config != null ? Builder.fromConfig(config: config) : Builder();
+
+    return builder
+        .setNetwork(types.Network.testnet)
+        .setEsploraServer(DefaultServicesTestnet.esploraServerUrl)
+        .setGossipSourceRgs(DefaultServicesTestnet.rgsServerUrl);
+  }
+
+  /// Creates a new builder instance with default services configured for mutinynet.
+  ///
+  factory Builder.mutinynet({types.Config? config}) {
+    final Builder builder =
+        config != null ? Builder.fromConfig(config: config) : Builder();
+
+    return builder
+        .setNetwork(types.Network.signet)
+        .setEsploraServer(DefaultServicesMutinynet.esploraServerUrl)
+        .setGossipSourceRgs(DefaultServicesMutinynet.rgsServerUrl);
+  }
+
   /// Configures the [Node] instance to source its wallet entropy from a seed file on disk.
   ///
   /// If the given file does not exist a new random seed file will be generated and

lib/src/utils/default_services.dart

@@ -0,0 +1,9 @@
+class DefaultServicesTestnet {
+  static const String esploraServerUrl = 'https://testnet.ltbl.io/api';
+  static const String rgsServerUrl = 'https://testnet.ltbl.io/snapshot';
+}
+
+class DefaultServicesMutinynet {
+  static const String esploraServerUrl = 'https://mutinynet.ltbl.io/api';
+  static const String rgsServerUrl = 'https://mutinynet.ltbl.io/snapshot';
+}