lightningd/notification: add 'channel_opened' notification

This notification is sent when a peer succesfully opens a channel to us

lightningd/notification.c

@@ -6,7 +6,8 @@ const char *notification_topics[] = {
 	"connect",
 	"disconnect",
 	"warning",
-	"invoice_payment"
+	"invoice_payment",
+	"channel_opened"
 };
 
 bool notifications_have_topic(const char *topic)
@@ -76,3 +77,19 @@ void notify_invoice_payment(struct lightningd *ld, struct amount_msat amount,
 	jsonrpc_notification_end(n);
 	plugins_notify(ld->plugins, take(n));
 }
+
+void notify_channel_opened(struct lightningd *ld, struct node_id *node_id,
+			   struct amount_sat *funding_sat, struct bitcoin_txid *funding_txid,
+			   bool *funding_locked)
+{
+	struct jsonrpc_notification *n =
+	    jsonrpc_notification_start(NULL, "channel_opened");
+	json_object_start(n->stream, "channel_opened");
+	json_add_node_id(n->stream, "id", node_id);
+	json_add_amount_sat_only(n->stream, "amount", *funding_sat);
+	json_add_txid(n->stream, "funding_txid", funding_txid);
+	json_add_bool(n->stream, "funding_locked", funding_locked);
+	json_object_end(n->stream);
+	jsonrpc_notification_end(n);
+	plugins_notify(ld->plugins, take(n));
+}

lightningd/notification.h

@@ -1,8 +1,11 @@
 #ifndef LIGHTNING_LIGHTNINGD_NOTIFICATION_H
 #define LIGHTNING_LIGHTNINGD_NOTIFICATION_H
 #include "config.h"
+#include <bitcoin/short_channel_id.h>
+#include <bitcoin/tx.h>
 #include <ccan/json_escape/json_escape.h>
 #include <common/amount.h>
+#include <common/node_id.h>
 #include <lightningd/jsonrpc.h>
 #include <lightningd/lightningd.h>
 #include <lightningd/log.h>
@@ -19,4 +22,8 @@ void notify_warning(struct lightningd *ld, struct log_entry *l);
 void notify_invoice_payment(struct lightningd *ld, struct amount_msat amount,
 			    struct preimage preimage, const struct json_escape *label);
 
+void notify_channel_opened(struct lightningd *ld, struct node_id *node_id,
+			   struct amount_sat *funding_sat, struct bitcoin_txid *funding_txid,
+			   bool *funding_locked);
+
 #endif /* LIGHTNING_LIGHTNINGD_NOTIFICATION_H */

lightningd/opening_control.c

@@ -659,6 +659,10 @@ static void opening_fundee_finished(struct subd *openingd,
 
 	channel_watch_funding(ld, channel);
 
+	/* Tell plugins about the success */
+	notify_channel_opened(ld, &channel->peer->id, &channel->funding,
+			   &channel->funding_txid, &channel->remote_funding_locked);
+
 	/* On to normal operation! */
 	peer_start_channeld(channel, pps, funding_signed, false);