Function json_setchannel

lightningd/peer_control.c:2684–2743

AUTODATA(json_command, &setchannelfee_command);

static struct command_result *json_setchannel(struct command *cmd,
					      const char *buffer,
					      const jsmntok_t *obj UNNEEDED,
					      const jsmntok_t *params)
{
	struct json_stream *response;
	struct peer *peer;
	struct channel **channels;
	u32 *base, *ppm, *delaysecs;
	struct amount_msat *htlc_min, *htlc_max;

	/* Parse the JSON command */
	if (!param(cmd, buffer, params,
		   p_req("id", param_channel_or_all, &channels),
		   p_opt("feebase", param_msat_u32, &base),
		   p_opt("feeppm", param_number, &ppm),
		   p_opt("htlcmin", param_msat, &htlc_min),
		   p_opt("htlcmax", param_msat, &htlc_max),
		   p_opt_def("enforcedelay", param_number, &delaysecs, 600),
		   NULL))
		return command_param_failed();

	/* Prevent obviously incorrect things! */
	if (htlc_min && htlc_max
	    && amount_msat_less(*htlc_max, *htlc_min)) {
		return command_fail(cmd, LIGHTNINGD,
				    "htlcmax cannot be less than htlcmin");
	}

	/* Open JSON response object for later iteration */
	response = json_stream_success(cmd);
	json_array_start(response, "channels");

	/* If the users requested 'all' channels we need to iterate */
	if (channels == NULL) {
		list_for_each(&cmd->ld->peers, peer, list) {
			struct channel *channel;
			list_for_each(&peer->channels, channel, list) {
				if (channel->state != CHANNELD_NORMAL &&
				    channel->state != CHANNELD_AWAITING_LOCKIN &&
				    channel->state != DUALOPEND_AWAITING_LOCKIN)
					continue;
				set_channel_config(cmd, channel, base, ppm,
						   htlc_min, htlc_max,
						   *delaysecs, response, true);
			}
		}
	/* single peer should be updated */
	} else {
		for (size_t i = 0; i < tal_count(channels); i++) {
			set_channel_config(cmd, channels[i], base, ppm,
					   htlc_min, htlc_max,
					   *delaysecs, response, true);
		}
	}

	/* Close and return response */
	json_array_end(response);