Function json_peer_sigs

plugins/spender/openchannel.c:529–598

}

static struct command_result *json_peer_sigs(struct command *cmd,
					     const char *buf,
					     const jsmntok_t *params)
{
	struct channel_id cid;
	const struct wally_psbt *psbt;
	struct multifundchannel_destination *dest;
	const char *err;

	err = json_scan(tmpctx, buf, params,
			"{openchannel_peer_sigs:"
			"{channel_id:%,signed_psbt:%}}",
			JSON_SCAN(json_to_channel_id, &cid),
			JSON_SCAN_TAL(cmd, json_to_psbt, &psbt));
	if (err)
		plugin_err(cmd->plugin,
			   "`openchannel_peer_sigs` did not scan: %s. %*.s",
			   err, json_tok_full_len(params),
			   json_tok_full(buf, params));

	/* Find the destination that's got this channel_id on it! */
	dest = find_dest_by_channel_id(&cid);
	if (!dest) {
		/* if there's no pending destination... whatever */
		plugin_log(cmd->plugin, LOG_DBG,
			   "mfc ??: `openchannel_peer_sigs` no "
			   "pending dest found for channel_id %s",
			   type_to_string(tmpctx, struct channel_id, &cid));
		return notification_handled(cmd);
	}

	plugin_log(cmd->plugin, LOG_DBG,
		   "mfc %"PRIu64":`openchannel_peer_sigs` notice received for"
		   " channel %s",
		   dest->mfc->id,
		   tal_hexstr(tmpctx, &cid, sizeof(cid)));

	/* Combine with the parent. Unknown map dupes are ignored,
	 * so the updated serial_id should persist on the parent */
	tal_wally_start();
	if (wally_psbt_combine(dest->mfc->psbt, psbt) != WALLY_OK)
		plugin_err(cmd->plugin,
			   "mfc %"PRIu64": Unable to combine signed "
			   "PSBT with roll-up. "
			   "Signed %s, prev %s", dest->mfc->id,
			   type_to_string(tmpctx, struct wally_psbt, psbt),
			   type_to_string(tmpctx, struct wally_psbt,
					  dest->mfc->psbt));

	tal_wally_end(dest->mfc->psbt);

	/* Bit of a race is possible here. If we're still waiting for
	 * their commitment sigs to come back, we'll be in
	 * "UPDATED" still. We check that SIGNED is hit before
	 * we mark ourselves as ready to send the sigs, so it's ok
	 * to relax this check */
	if (dest->state == MULTIFUNDCHANNEL_UPDATED)
		dest->state = MULTIFUNDCHANNEL_SIGNED_NOT_SECURED;