4 files changed, 37 insertions, 16 deletions

diff --git a/modules/mono/csharp_script.cpp b/modules/mono/csharp_script.cpp
index 24292b77ed..3cfc376317 100644
--- a/modules/mono/csharp_script.cpp
+++ b/modules/mono/csharp_script.cpp
@@ -1310,21 +1310,27 @@ bool CSharpInstance::refcount_decremented() {
 	return ref_dying;
 }
 
-ScriptInstance::RPCMode CSharpInstance::_member_get_rpc_mode(GDMonoClassMember *p_member) const {
+MultiplayerAPI::RPCMode CSharpInstance::_member_get_rpc_mode(GDMonoClassMember *p_member) const {
 
 	if (p_member->has_attribute(CACHED_CLASS(RemoteAttribute)))
-		return RPC_MODE_REMOTE;
+		return MultiplayerAPI::RPC_MODE_REMOTE;
 	if (p_member->has_attribute(CACHED_CLASS(SyncAttribute)))
-		return RPC_MODE_SYNC;
+		return MultiplayerAPI::RPC_MODE_SYNC;
 	if (p_member->has_attribute(CACHED_CLASS(MasterAttribute)))
-		return RPC_MODE_MASTER;
+		return MultiplayerAPI::RPC_MODE_MASTER;
 	if (p_member->has_attribute(CACHED_CLASS(SlaveAttribute)))
-		return RPC_MODE_SLAVE;
+		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 RPC_MODE_DISABLED;
+	return MultiplayerAPI::RPC_MODE_DISABLED;
 }
 
-ScriptInstance::RPCMode CSharpInstance::get_rpc_mode(const StringName &p_method) const {
+MultiplayerAPI::RPCMode CSharpInstance::get_rpc_mode(const StringName &p_method) const {
 
 	GDMonoClass *top = script->script_class;
 
@@ -1337,10 +1343,10 @@ ScriptInstance::RPCMode CSharpInstance::get_rpc_mode(const StringName &p_method)
 		top = top->get_parent_class();
 	}
 
-	return RPC_MODE_DISABLED;
+	return MultiplayerAPI::RPC_MODE_DISABLED;
 }
 
-ScriptInstance::RPCMode CSharpInstance::get_rset_mode(const StringName &p_variable) const {
+MultiplayerAPI::RPCMode CSharpInstance::get_rset_mode(const StringName &p_variable) const {
 
 	GDMonoClass *top = script->script_class;
 
@@ -1358,7 +1364,7 @@ ScriptInstance::RPCMode CSharpInstance::get_rset_mode(const StringName &p_variab
 		top = top->get_parent_class();
 	}
 
-	return RPC_MODE_DISABLED;
+	return MultiplayerAPI::RPC_MODE_DISABLED;
 }
 
 void CSharpInstance::notification(int p_notification) {
@@ -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/csharp_script.h b/modules/mono/csharp_script.h
index 8666149111..cae2bbf40a 100644
--- a/modules/mono/csharp_script.h
+++ b/modules/mono/csharp_script.h
@@ -192,7 +192,7 @@ class CSharpInstance : public ScriptInstance {
 
 	void _call_multilevel(MonoObject *p_mono_object, const StringName &p_method, const Variant **p_args, int p_argcount);
 
-	RPCMode _member_get_rpc_mode(GDMonoClassMember *p_member) const;
+	MultiplayerAPI::RPCMode _member_get_rpc_mode(GDMonoClassMember *p_member) const;
 
 public:
 	MonoObject *get_mono_object() const;
@@ -213,8 +213,8 @@ public:
 	virtual void refcount_incremented();
 	virtual bool refcount_decremented();
 
-	virtual RPCMode get_rpc_mode(const StringName &p_method) const;
-	virtual RPCMode get_rset_mode(const StringName &p_variable) const;
+	virtual MultiplayerAPI::RPCMode get_rpc_mode(const StringName &p_method) const;
+	virtual MultiplayerAPI::RPCMode get_rset_mode(const StringName &p_variable) const;
 
 	virtual void notification(int p_notification);
 	void call_notification_no_check(MonoObject *p_mono_object, int p_notification);
diff --git a/modules/mono/glue/cs_files/RPCAttributes.cs b/modules/mono/glue/cs_files/RPCAttributes.cs
index 08841ffd76..6bf9560bfa 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 db136a1313..fbdbeaa3f7 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"));