listpeers: show channel direction for each outgoing channel.

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

CHANGELOG.md

@@ -12,6 +12,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - plugins: fully enabled, and ready for you to write some!
 - lightning-cli: `help <cmd>` finds man pages even if `make install` not run.
 - JSON API: `waitsendpay` now has an `erring_channel_direction` field.
+- JSON API: `listpeers` now has a `channel_direction` field in `channels`.
 
 ### Changed
 

lightningd/peer_control.c

@@ -703,10 +703,13 @@ static void json_add_peer(struct lightningd *ld,
 		if (channel->owner)
 			json_add_string(response, "owner",
 					channel->owner->name);
-		if (channel->scid)
+		if (channel->scid) {
 			json_add_short_channel_id(response,
 						  "short_channel_id",
 						  channel->scid);
+			json_add_num(response, "channel_direction",
+				     pubkey_idx(&ld->id, &p->id));
+		}
 		derive_channel_id(&cid,
 				  &channel->funding_txid,
 				  channel->funding_outnum);