fix order cancel

helper/async/order.php

@@ -121,8 +121,16 @@ class order extends IAsync
         $bonus_rates = $this->simple_order->bonus_rates();
         if(empty($bonus_rates)) {
             $bonus_rates = [30 => $pd_amount];
-        } else {
-            $bonus_rates = unserialize($bonus_rates);
+        }
+        else
+        {
+            $tmp = [];
+            foreach ($bonus_rates as $val) {
+                $rate = $val['rate'];
+                $amount = $val['total'];
+                $tmp[$rate] = $amount;
+            }
+            $bonus_rates = $tmp;
         }
 
         $params = bonus\parameters::order_cancel($bonus_rates);