channeld: always tell gossipd about local channels.

Instead of considering it a temporary step, consider it a necessary preamble
to sending updates.

This means (in the next patch) when we tell gossipd to generate the updates,
it's always done after we've told it to create the channel.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

channeld/channel.c

@@ -160,7 +160,7 @@ struct peer {
 	u8 channel_flags;
 
 	bool announce_depth_reached;
-	bool sent_temporary_announce;
+	bool channel_local_active;
 
 	/* Make sure timestamps move forward. */
 	u32 last_update_timestamp;
@@ -349,9 +349,8 @@ static void send_channel_update(struct peer *peer, bool peer_too,
 
 	assert(disable_flag == 0 || disable_flag == ROUTING_FLAGS_DISABLED);
 
-	/* Only send an update if we sent a temporary or real announcement */
-	if (!peer->sent_temporary_announce
-	    && !(peer->have_sigs[LOCAL] && peer->have_sigs[REMOTE]))
+	/* Only send an update if we told gossipd */
+	if (!peer->channel_local_active)
 		return;
 
 	msg = create_channel_update(tmpctx, peer, disable_flag);
@@ -370,7 +369,7 @@ static void send_channel_update(struct peer *peer, bool peer_too,
  * channel_update is not preceeded by a channel_announcement and won't make much
  * sense to other nodes, so we don't tell gossipd about it.
  */
-static void send_temporary_announcement(struct peer *peer)
+static void make_channel_local_active(struct peer *peer)
 {
 	u8 *msg;
 
@@ -504,6 +503,10 @@ static void channel_announcement_negotiate(struct peer *peer)
 	if (!peer->funding_locked[LOCAL] || !peer->funding_locked[REMOTE])
 		return;
 
+	if (!peer->channel_local_active) {
+		peer->channel_local_active = true;
+		make_channel_local_active(peer);
+	}
 	/* BOLT #7:
 	 *
 	 * If sent, `announcement_signatures` messages MUST NOT be sent until
@@ -520,10 +523,6 @@ static void channel_announcement_negotiate(struct peer *peer)
 	 * announcement, otherwise we send a temporary one */
 	if (peer->have_sigs[LOCAL] && peer->have_sigs[REMOTE])
 		announce_channel(peer);
-	else if (!peer->sent_temporary_announce) {
-		peer->sent_temporary_announce = true;
-		send_temporary_announcement(peer);
-	}
 }
 
 static void handle_peer_funding_locked(struct peer *peer, const u8 *msg)
@@ -2585,7 +2584,7 @@ int main(int argc, char *argv[])
 	peer->commit_timer = NULL;
 	peer->have_sigs[LOCAL] = peer->have_sigs[REMOTE] = false;
 	peer->announce_depth_reached = false;
-	peer->sent_temporary_announce = false;
+	peer->channel_local_active = false;
 	msg_queue_init(&peer->from_master, peer);
 	msg_queue_init(&peer->from_gossipd, peer);
 	msg_queue_init(&peer->peer_out, peer);