libplugin don't expose the plugin struct

plugins/libplugin.c

@@ -51,6 +51,57 @@ struct rpc_conn {
 	MEMBUF(char) mb;
 };
 
+struct plugin {
+	/* lightningd interaction */
+	struct io_conn *stdin_conn;
+	struct io_conn *stdout_conn;
+
+	/* To read from lightningd */
+	char *buffer;
+	size_t used, len_read;
+
+	/* To write to lightningd */
+	struct json_stream **js_arr;
+
+	/* Asynchronous RPC interaction */
+	struct io_conn *io_rpc_conn;
+	struct json_stream **rpc_js_arr;
+	char *rpc_buffer;
+	size_t rpc_used, rpc_len_read;
+	/* Tracking async RPC requests */
+	UINTMAP(struct out_req *) out_reqs;
+	u64 next_outreq_id;
+
+	/* Synchronous RPC interaction */
+	struct rpc_conn *rpc_conn;
+
+	/* Plugin informations */
+	enum plugin_restartability restartability;
+	const struct plugin_command *commands;
+	size_t num_commands;
+	const struct plugin_notification *notif_subs;
+	size_t num_notif_subs;
+	const struct plugin_hook *hook_subs;
+	size_t num_hook_subs;
+	struct plugin_option *opts;
+
+	/* Anything special to do at init ? */
+	void (*init)(struct plugin *p,
+		     const char *buf, const jsmntok_t *);
+	/* Has the manifest been sent already ? */
+	bool manifested;
+	/* Has init been received ? */
+	bool initialized;
+
+	/* Map from json command names to usage strings: we don't put this inside
+	 * struct json_command as it's good practice to have those const. */
+	STRMAP(const char *) usagemap;
+	/* Timers */
+	struct timers timers;
+	size_t in_timer;
+};
+
+
 /* command_result is mainly used as a compile-time check to encourage you
  * to return as soon as you get one (and not risk use-after-free of command).
  * Here we use two values: complete (cmd freed) and pending (still going) */