如何以编程方式Magento添加商店信用？

I am creating a script in which I am getting order data from third party. Everything is working fine, the issue is that I am unable to add storecredit to order. Is there any way to add store credit in order and substract them from grandtotal. Here is my code:

$order->setDiscountAmount($total_discount)->setBaseDiscountAmout($total_discount);
                $order->setSubtotal($total_amount)->setBaseSubtotal($total_amount);
                $order->setGrandTotal($total_amount-$total_discount)->setBaseGrandTotal($total_amount-$total_discount);
                $order->save();

I wanted to do the same thing, and looking at the comments, I think it's ridiculous that this thread just died. Either you are here to help and assist, or you are not. If the thread dies because you enforce a question standard, is that helpful?

Here is how to do it.

$balance = Mage::getModel('enterprise_customerbalance/balance')
            ->setWebsiteId(Mage::app()->getStore($quote->getStoreId())->getWebsiteId())
            ->setCustomerId($quote->getCustomerId())
            ->loadByCustomer();

        if ($balance && $balance >= $creditTobeUsed) {
            $quote->setUseCustomerBalance(true);
            $quote->setCustomerBalanceInstance($balance);
        }

        $quote->collectTotals();
        $quote->save();

Enterprise_CustomerBalance_Block_Checkout_Onepage_Payment_Additional has some methods which you can use

Finally, when credit is applied, at the checkout make sure that you set the following

<input type="hidden" type="text" value="1"  name="payment[use_customer_balance]" class="input-text" />