getroute: add direction to route returned.

We also ignore it in sendpay.

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

gossipd/routing.c

@@ -1561,6 +1561,7 @@ struct route_hop *get_route(const tal_t *ctx, struct routing_state *rstate,
 		hops[i].nodeid = n->id;
 		hops[i].amount = total_amount;
 		hops[i].delay = total_delay;
+		hops[i].direction = idx;
 		total_amount += connection_fee(c, total_amount);
 		total_delay += c->delay;
 		n = other_node(n, route[i]);

gossipd/routing.h

@@ -207,6 +207,7 @@ get_channel(const struct routing_state *rstate,
 
 struct route_hop {
 	struct short_channel_id channel_id;
+	int direction;
 	struct pubkey nodeid;
 	u64 amount;
 	u32 delay;

lightningd/gossip_msg.c

@@ -64,13 +64,16 @@ void fromwire_route_hop(const u8 **pptr, size_t *max, struct route_hop *entry)
 {
 	fromwire_pubkey(pptr, max, &entry->nodeid);
 	fromwire_short_channel_id(pptr, max, &entry->channel_id);
+	entry->direction = fromwire_u8(pptr, max);
 	entry->amount = fromwire_u64(pptr, max);
 	entry->delay = fromwire_u32(pptr, max);
 }
+
 void towire_route_hop(u8 **pptr, const struct route_hop *entry)
 {
 	towire_pubkey(pptr, &entry->nodeid);
 	towire_short_channel_id(pptr, &entry->channel_id);
+	towire_u8(pptr, entry->direction);
 	towire_u64(pptr, entry->amount);
 	towire_u32(pptr, entry->delay);
 }

lightningd/json.c

@@ -30,6 +30,7 @@ json_add_route_hop(struct json_stream *r, char const *n,
 	json_add_pubkey(r, "id", &h->nodeid);
 	json_add_short_channel_id(r, "channel",
 				  &h->channel_id);
+	json_add_num(r, "direction", h->direction);
 	json_add_u64(r, "msatoshi", h->amount);
 	json_add_num(r, "delay", h->delay);
 	json_object_end(r);

lightningd/pay.c

@@ -1004,13 +1004,14 @@ static struct command_result *json_sendpay(struct command *cmd,
 		u64 *amount;
 		struct pubkey *id;
 		struct short_channel_id *channel;
-		unsigned *delay;
+		unsigned *delay, *direction;
 
 		if (!param(cmd, buffer, t,
 			   p_req("msatoshi", param_u64, &amount),
 			   p_req("id", param_pubkey, &id),
 			   p_req("delay", param_number, &delay),
 			   p_req("channel", param_short_channel_id, &channel),
+			   p_opt("direction", param_number, &direction),
 			   NULL))
 			return command_param_failed();
 
@@ -1020,6 +1021,8 @@ static struct command_result *json_sendpay(struct command *cmd,
 		route[n_hops].nodeid = *id;
 		route[n_hops].delay = *delay;
 		route[n_hops].channel_id = *channel;
+		/* FIXME: Actually ignored by sending code! */
+		route[n_hops].direction = direction ? *direction : 0;
 		n_hops++;
 	}