4 files changed, 27 insertions, 3 deletions

diff --git a/modules/mono/csharp_script.cpp b/modules/mono/csharp_script.cpp
index 4b28746ca..3cfc37631 100644
--- a/modules/mono/csharp_script.cpp
+++ b/modules/mono/csharp_script.cpp
@@ -1320,6 +1320,12 @@ MultiplayerAPI::RPCMode CSharpInstance::_member_get_rpc_mode(GDMonoClassMember *
 		return MultiplayerAPI::RPC_MODE_MASTER;
 	if (p_member->has_attribute(CACHED_CLASS(SlaveAttribute)))
 		return MultiplayerAPI::RPC_MODE_SLAVE;
+	if (p_member->has_attribute(CACHED_CLASS(RemoteSyncAttribute)))
+		return MultiplayerAPI::RPC_MODE_REMOTESYNC;
+	if (p_member->has_attribute(CACHED_CLASS(MasterSyncAttribute)))
+		return MultiplayerAPI::RPC_MODE_MASTERSYNC;
+	if (p_member->has_attribute(CACHED_CLASS(SlaveSyncAttribute)))
+		return MultiplayerAPI::RPC_MODE_SLAVESYNC;
 
 	return MultiplayerAPI::RPC_MODE_DISABLED;
 }
@@ -1967,15 +1973,15 @@ ScriptInstance *CSharpScript::instance_create(Object *p_this) {
 		return NULL;
 #endif
 	}
-	
+
 	if (!script_class) {
 		if (GDMono::get_singleton()->get_project_assembly() == NULL) {
 			// The project assembly is not loaded
 			ERR_EXPLAIN("Cannot instance script because the project assembly is not loaded. Script: " + get_path());
 			ERR_FAIL_V(NULL);
 		}
-		
-			// The project assembly is loaded, but the class could not found
+
+		// The project assembly is loaded, but the class could not found
 		ERR_EXPLAIN("Cannot instance script because the class '" + name + "' could not be found. Script: " + get_path());
 		ERR_FAIL_V(NULL);
 	}
diff --git a/modules/mono/glue/cs_files/RPCAttributes.cs b/modules/mono/glue/cs_files/RPCAttributes.cs
index 08841ffd7..6bf9560bf 100644
--- a/modules/mono/glue/cs_files/RPCAttributes.cs
+++ b/modules/mono/glue/cs_files/RPCAttributes.cs
@@ -13,4 +13,13 @@ namespace Godot
 
     [AttributeUsage(AttributeTargets.Method | AttributeTargets.Field)]
     public class SlaveAttribute : Attribute {}
+
+    [AttributeUsage(AttributeTargets.Method | AttributeTargets.Field)]
+    public class RemoteSyncAttribute : Attribute {}
+
+    [AttributeUsage(AttributeTargets.Method | AttributeTargets.Field)]
+    public class MasterSyncAttribute : Attribute {}
+
+    [AttributeUsage(AttributeTargets.Method | AttributeTargets.Field)]
+    public class SlaveSyncAttribute : Attribute {}
 }
diff --git a/modules/mono/mono_gd/gd_mono_utils.cpp b/modules/mono/mono_gd/gd_mono_utils.cpp
index db136a131..fbdbeaa3f 100644
--- a/modules/mono/mono_gd/gd_mono_utils.cpp
+++ b/modules/mono/mono_gd/gd_mono_utils.cpp
@@ -120,6 +120,9 @@ void MonoCache::clear_members() {
 	class_SyncAttribute = NULL;
 	class_MasterAttribute = NULL;
 	class_SlaveAttribute = NULL;
+	class_RemoteSyncAttribute = NULL;
+	class_MasterSyncAttribute = NULL;
+	class_SlaveSyncAttribute = NULL;
 	class_GodotMethodAttribute = NULL;
 	field_GodotMethodAttribute_methodName = NULL;
 
@@ -208,6 +211,9 @@ void update_godot_api_cache() {
 	CACHE_CLASS_AND_CHECK(SyncAttribute, GODOT_API_CLASS(SyncAttribute));
 	CACHE_CLASS_AND_CHECK(MasterAttribute, GODOT_API_CLASS(MasterAttribute));
 	CACHE_CLASS_AND_CHECK(SlaveAttribute, GODOT_API_CLASS(SlaveAttribute));
+	CACHE_CLASS_AND_CHECK(RemoteSyncAttribute, GODOT_API_CLASS(RemoteSyncAttribute));
+	CACHE_CLASS_AND_CHECK(MasterSyncAttribute, GODOT_API_CLASS(MasterSyncAttribute));
+	CACHE_CLASS_AND_CHECK(SlaveSyncAttribute, GODOT_API_CLASS(SlaveSyncAttribute));
 	CACHE_CLASS_AND_CHECK(GodotMethodAttribute, GODOT_API_CLASS(GodotMethodAttribute));
 	CACHE_FIELD_AND_CHECK(GodotMethodAttribute, methodName, CACHED_CLASS(GodotMethodAttribute)->get_field("methodName"));
 
diff --git a/modules/mono/mono_gd/gd_mono_utils.h b/modules/mono/mono_gd/gd_mono_utils.h
index 1a34180d1..fc13a00e8 100644
--- a/modules/mono/mono_gd/gd_mono_utils.h
+++ b/modules/mono/mono_gd/gd_mono_utils.h
@@ -112,6 +112,9 @@ struct MonoCache {
 	GDMonoClass *class_ToolAttribute;
 	GDMonoClass *class_RemoteAttribute;
 	GDMonoClass *class_SyncAttribute;
+	GDMonoClass *class_RemoteSyncAttribute;
+	GDMonoClass *class_MasterSyncAttribute;
+	GDMonoClass *class_SlaveSyncAttribute;
 	GDMonoClass *class_MasterAttribute;
 	GDMonoClass *class_SlaveAttribute;
 	GDMonoClass *class_GodotMethodAttribute;