Function json_listchannels

plugins/topology.c:270–336

}

static struct command_result *json_listchannels(struct command *cmd,
						const char *buffer,
						const jsmntok_t *params)
{
	struct node_id *source;
	struct node_id *destination;
	struct short_channel_id *scid;
	struct gossmap_chan *c;
	struct json_stream *js;
	struct gossmap *gossmap;

	if (!param(cmd, buffer, params,
		   p_opt("short_channel_id", param_short_channel_id,
			 &scid),
		   p_opt("source", param_node_id, &source),
		   p_opt("destination", param_node_id, &destination),
		   NULL))
		return command_param_failed();

	if (!!scid + !!source + !!destination > 1)
		return command_fail(cmd, JSONRPC2_INVALID_PARAMS,
				    "Can only specify one of "
				    "`short_channel_id`, "
				    "`source` or `destination`");

	gossmap = get_gossmap();
	js = jsonrpc_stream_success(cmd);
	json_array_start(js, "channels");
	if (scid) {
		c = gossmap_find_chan(gossmap, scid);
		if (c)
			json_add_halfchan(js, gossmap, c, 3);
	} else if (source) {
		struct gossmap_node *src;

		src = gossmap_find_node(gossmap, source);
		if (src) {
			for (size_t i = 0; i < src->num_chans; i++) {
				int dir;
				c = gossmap_nth_chan(gossmap, src, i, &dir);
				json_add_halfchan(js, gossmap,
						  c, 1 << dir);
			}
		}
	} else if (destination) {
		struct gossmap_node *dst;

		dst = gossmap_find_node(gossmap, destination);
		if (dst) {
			for (size_t i = 0; i < dst->num_chans; i++) {
				int dir;
				c = gossmap_nth_chan(gossmap, dst, i, &dir);
				json_add_halfchan(js, gossmap,
						  c, 1 << !dir);
			}
		}
	} else {
		for (c = gossmap_first_chan(gossmap);