gossipd: use optional fields.

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

gossipd/gossip.c

@@ -2269,18 +2269,15 @@ static struct io_plan *getnodes(struct io_conn *conn, struct daemon *daemon,
 	u8 *out;
 	struct node *n;
 	const struct gossip_getnodes_entry **nodes;
-	struct pubkey *ids;
+	struct pubkey *id;
 
-	fromwire_gossip_getnodes_request(tmpctx, msg, &ids);
+	fromwire_gossip_getnodes_request(tmpctx, msg, &id);
 
 	nodes = tal_arr(tmpctx, const struct gossip_getnodes_entry *, 0);
-	if (ids) {
-		for (size_t i = 0; i < tal_count(ids); i++) {
-			n = get_node(daemon->rstate, &ids[i]);
+	if (id) {
+		n = get_node(daemon->rstate, id);
 		if (n)
-				append_node(&nodes, &ids[i], n->gfeatures,
-					    NULL, n);
-		}
+			append_node(&nodes, id, n->gfeatures, NULL, n);
 	} else {
 		struct node_map_iter i;
 		n = node_map_first(daemon->rstate->nodes, &i);
@@ -3556,7 +3553,7 @@ static struct io_plan *get_peers(struct io_conn *conn,
 	struct pubkey *id = tal_arr(conn, struct pubkey, n);
 	struct wireaddr_internal *wireaddr = tal_arr(conn, struct wireaddr_internal, n);
 	const struct gossip_getnodes_entry **nodes = tal_arr(conn, const struct gossip_getnodes_entry *, n);
-	struct pubkey *specific_id = NULL;
+	struct pubkey *specific_id;
 
 	if (!fromwire_gossip_getpeers_request(msg, msg, &specific_id))
 		master_badmsg(WIRE_GOSSIPCTL_PEER_ADDRHINT, msg);

gossipd/gossip_wire.csv

@@ -18,9 +18,7 @@ gossipctl_init,,rgb,3*u8
 gossipctl_init,,alias,32*u8
 gossipctl_init,,update_channel_interval,u32
 gossipctl_init,,reconnect,bool
-# This is 0 or 1.
-gossipctl_init,,num_tor_proxyaddrs,u16
-gossipctl_init,,tor_proxyaddr,num_tor_proxyaddrs*struct wireaddr
+gossipctl_init,,tor_proxyaddr,?struct wireaddr
 gossipctl_init,,use_tor_proxy_always,bool
 gossipctl_init,,dev_allow_localhost,bool
 gossipctl_init,,use_dns,bool
@@ -112,9 +110,7 @@ gossipctl_peer_disconnected,,id,struct pubkey
 
 # Pass JSON-RPC getnodes call through
 gossip_getnodes_request,3005
-# Can be 0 or 1 currently
-gossip_getnodes_request,,num,u16
-gossip_getnodes_request,,id,num*struct pubkey
+gossip_getnodes_request,,id,?struct pubkey
 
 #include <lightningd/gossip_msg.h>
 gossip_getnodes_reply,3105
@@ -136,9 +132,7 @@ gossip_getroute_reply,,num_hops,u16
 gossip_getroute_reply,,hops,num_hops*struct route_hop
 
 gossip_getchannels_request,3007
-# In practice, 0 or 1.
-gossip_getchannels_request,,num,u16
-gossip_getchannels_request,,short_channel_id,num*struct short_channel_id
+gossip_getchannels_request,,short_channel_id,?struct short_channel_id
 
 gossip_getchannels_reply,3107
 gossip_getchannels_reply,,num_channels,u16
@@ -201,9 +195,7 @@ gossip_resolve_channel_reply,,keys,num_keys*struct pubkey
 
 # The main daemon asks for peers
 gossip_getpeers_request,3011
-# 0 or 1
-gossip_getpeers_request,,num,u16
-gossip_getpeers_request,,id,num*struct pubkey
+gossip_getpeers_request,,id,?struct pubkey
 
 gossip_getpeers_reply,3111
 gossip_getpeers_reply,,num,u16