plugin: add hooks example

Signed-off-by: Vincenzo Palazzo <[email protected]>

packages/cln_plugin/example/cln_plugin_class_example.dart

@@ -5,7 +5,6 @@ import 'package:cln_plugin/cln_plugin.dart';
 ///
 /// This involve the possibility to develop in a more OOP style the
 /// code, but also to keep the code clean a simple to read.
-
 class MyPlugin extends Plugin {
   /// This is a method that is registered to be called by the plugin
   /// where core lightning will require it.
@@ -17,6 +16,12 @@ class MyPlugin extends Plugin {
     });
   }
 
+  Future<Map<String, Object>> onRpcCommand(
+      Plugin plugin, Map<String, Object> request) {
+    log(level: "info", message: "hook info");
+    return Future(() => {"result": "continue"});
+  }
+
   /// This is a method that is subscribed to be called in response to
   /// a notification emitted by core lightning.
   Future<Map<String, Object>> notifyMethod(
@@ -44,6 +49,10 @@ class MyPlugin extends Plugin {
     /// This is the standard way to subscribe to a core lightning
     /// notification.
     registerSubscriptions(event: 'connect', callback: notifyMethod);
+
+    /// Register an hook that it is triggered by core lightning when
+    /// any rpc command is executed.
+    registerHook(name: "rpc_command", callback: onRpcCommand);
   }
 }
 

packages/cln_plugin/example/cln_plugin_example.dart

@@ -30,5 +30,11 @@ void main() {
       def: "World",
       description: "What name should I call you?",
       deprecated: false);
+  plugin.registerHook(
+      name: "rpc_command",
+      callback: (plugin, request) {
+        plugin.log(level: "info", message: "hook info");
+        return Future(() => {"result": "continue"});
+      });
   plugin.start();
 }