channeld: get local peer features from lightningd.

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

channeld/channel_wire.csv

@@ -59,6 +59,8 @@ channel_init,,init_peer_pkt_len,u16
 channel_init,,init_peer_pkt,init_peer_pkt_len*u8
 channel_init,,reached_announce_depth,bool
 channel_init,,last_remote_secret,struct secret
+channel_init,,lflen,u16
+channel_init,,localfeatures,lflen*u8
 
 # master->channeld funding hit new depth >= lock depth
 channel_funding_locked,1002

channeld/channeld.c

@@ -68,6 +68,9 @@ struct peer {
 	bool funding_locked[NUM_SIDES];
 	u64 next_index[NUM_SIDES];
 
+	/* Features peer supports. */
+	u8 *localfeatures;
+
 	/* Tolerable amounts for feerate (only relevant for fundee). */
 	u32 feerate_min, feerate_max;
 
@@ -2654,7 +2657,8 @@ static void init_channel(struct peer *peer)
 				   &peer->channel_flags,
 				   &funding_signed,
 				   &peer->announce_depth_reached,
-				   &last_remote_per_commit_secret))
+				   &last_remote_per_commit_secret,
+				   &peer->localfeatures))
 		master_badmsg(WIRE_CHANNEL_INIT, msg);
 
 	status_trace("init %s: remote_per_commit = %s, old_remote_per_commit = %s"

lightningd/channel_control.c

@@ -381,7 +381,8 @@ void peer_start_channeld(struct channel *channel,
 				      channel->channel_flags,
 				      funding_signed,
 				      reached_announce_depth,
-				      &last_remote_per_commit_secret);
+				      &last_remote_per_commit_secret,
+				      channel->peer->localfeatures);
 
 	/* We don't expect a response: we are triggered by funding_depth_cb. */
 	subd_send_msg(channel->owner, take(initmsg));