在laravel中实现事务回滚的方法

public static function createDeal($to_status, $params, $new_balance, $update = true)  {    /DB::beginTransaction();      try {      $update_order_status = /DB::table('wallet_order')                  ->where('order_id', $params['order_id'])                  ->update(['to_status' => $to_status, 'update_time' => $params['pay_time']]);      if (!$update_order_status) {        throw new /Exception("update order error");      }        $create_deal_status = /DB::table('wallet_deal')                  ->insert($params);      if (!$create_deal_status) {        throw new /Exception("create deal error");              }        if ($update) {                $update_manage_status = self::updateManage(['balance' => $new_balance, 'update_time' => $params['pay_time']], $params['from_user']);        if (!$update_manage_status) {          throw new /Exception("update manage error");        }      } else {        $manage_params = [          'user_id' => intval($params['from_user']),          'balance' => $new_balance,          'add_time' => $params['pay_time'],          'update_time' => $params['pay_time'],        ];        $create_manage_status = self::createManage($manage_params);        if (!$create_manage_status) {          throw new /Exception("create manage error");        }      }      /DB::commit();    } catch (/Exception $e) {

		//异常处理进行回滚，自己想对应的业务      /DB::rollback();      $trouble_params = [        'order_id' => $params['order_id'],        'deal_id' => $params['deal_id'],        'from_user' => $params['from_user'],        'to_user' => $params['to_user'],        'total_amount' => $params['total_amount'],        'add_time' => $params['pay_time'],        'type' => $params['type'],        'to_status' => $to_status      ];      /DB::connection('mongodb')        ->table('wallet_trouble')        ->insert($trouble_params);    } finally {      self::createLog($params, $to_status);    }  }