Function check_cltv

lightningd/peer_htlcs.c:374–383

BOLT #4: * * - if it is not the final node: * - MUST return an error if: * ... * - `cltv_expiry` - `cltv_expiry_delta` < `outgoing_cltv_value` * - If it is the final node: *... * - MUST return an error if: *... * - incoming `cltv_expiry` < `outgoing_cltv_value`. */

 *       - incoming `cltv_expiry` < `outgoing_cltv_value`.
 */
static bool check_cltv(struct htlc_in *hin,
		       u32 cltv_expiry, u32 outgoing_cltv_value, u32 delta)
{
	if (delta < cltv_expiry && cltv_expiry - delta >= outgoing_cltv_value)
		return true;
	log_debug(hin->key.channel->log, "HTLC %"PRIu64" incorrect CLTV:"
		  " %u in, %u out, delta reqd %u",
		  hin->key.id, cltv_expiry, outgoing_cltv_value, delta);
	return false;
}

void fulfill_htlc(struct htlc_in *hin, const struct preimage *preimage)
{