[Net] Modularize multiplayer, expose MultiplayerAPI to extensions.

- RPC configurations are now dictionaries.
- Script.get_rpc_methods renamed to Script.get_rpc_config.
- Node.rpc[_id] and Callable.rpc now return an Error.
- Refactor MultiplayerAPI to allow extension.
- New MultiplayerAPI.rpc method with Array argument (for scripts).
- Move the default MultiplayerAPI implementation to a module.

1 files changed, 4 insertions, 3 deletions

diff --git a/modules/visual_script/visual_script_nodes.h b/modules/visual_script/visual_script_nodes.h
index 18573f8682..35e3c490cd 100644
--- a/modules/visual_script/visual_script_nodes.h
+++ b/modules/visual_script/visual_script_nodes.h
@@ -33,6 +33,7 @@
 
 #include "core/object/gdvirtual.gen.inc"
 #include "core/object/script_language.h"
+#include "scene/main/multiplayer_api.h"
 #include "visual_script.h"
 
 class VisualScriptFunction : public VisualScriptNode {
@@ -49,7 +50,7 @@ class VisualScriptFunction : public VisualScriptNode {
 
 	bool stack_less;
 	int stack_size;
-	Multiplayer::RPCMode rpc_mode;
+	MultiplayerAPI::RPCMode rpc_mode;
 	bool sequenced;
 
 protected:
@@ -90,8 +91,8 @@ public:
 	void set_stack_size(int p_size);
 	int get_stack_size() const;
 
-	void set_rpc_mode(Multiplayer::RPCMode p_mode);
-	Multiplayer::RPCMode get_rpc_mode() const;
+	void set_rpc_mode(MultiplayerAPI::RPCMode p_mode);
+	MultiplayerAPI::RPCMode get_rpc_mode() const;
 
 	virtual VisualScriptNodeInstance *instantiate(VisualScriptInstance *p_instance) override;