jsonrpc: Return the channel capacity for listchannels

Signed-off-by: Christian Decker <decker.christian@gmail.com>

gossipd/gossip.c

@@ -1116,6 +1116,7 @@ static void append_half_channel(struct gossip_getchannels_entry **entries,
 
 	e->source = chan->nodes[idx]->id;
 	e->destination = chan->nodes[!idx]->id;
+	e->satoshis = chan->satoshis;
 	e->active = c->active;
 	e->flags = c->flags;
 	e->public = (c->channel_update != NULL);

lightningd/gossip_control.c

@@ -444,6 +444,7 @@ static void json_listchannels_reply(struct subd *gossip UNUSED, const u8 *reply,
 		json_add_num(response, "flags", entries[i].flags);
 		json_add_bool(response, "active", entries[i].active);
 		json_add_bool(response, "public", entries[i].public);
+		json_add_u64(response, "satoshis", entries[i].satoshis);
 		if (entries[i].last_update_timestamp >= 0) {
 			json_add_num(response, "last_update",
 				     entries[i].last_update_timestamp);

lightningd/gossip_msg.c

@@ -71,6 +71,7 @@ void fromwire_gossip_getchannels_entry(const u8 **pptr, size_t *max,
 	fromwire_short_channel_id(pptr, max, &entry->short_channel_id);
 	fromwire_pubkey(pptr, max, &entry->source);
 	fromwire_pubkey(pptr, max, &entry->destination);
+	entry->satoshis = fromwire_u64(pptr, max);
 	entry->active = fromwire_bool(pptr, max);
 	entry->flags = fromwire_u16(pptr, max);
 	entry->public = fromwire_bool(pptr, max);
@@ -88,6 +89,7 @@ void towire_gossip_getchannels_entry(
 	towire_short_channel_id(pptr, &entry->short_channel_id);
 	towire_pubkey(pptr, &entry->source);
 	towire_pubkey(pptr, &entry->destination);
+	towire_u64(pptr, entry->satoshis);
 	towire_bool(pptr, entry->active);
 	towire_u16(pptr, entry->flags);
 	towire_bool(pptr, entry->public);

lightningd/gossip_msg.h

@@ -14,6 +14,7 @@ struct gossip_getnodes_entry {
 
 struct gossip_getchannels_entry {
 	struct pubkey source, destination;
+	u64 satoshis;
 	bool active;
 	struct short_channel_id short_channel_id;
 	u16 flags;