Custom payment method with extra fee

Question

I need to create a simple custom payment method like "cash on delivery" but with extra fee when customer selects it. I implemented payment method, but can't find how to make part with extra fee. Can anybody give me a hint?

Answer 1

I found this article how to add custom fee and only added couple changes to collect() function, like this:

public function collect(Mage_Sales_Model_Quote_Address $address)
{
    parent::collect($address);
    try{
        $quote = $address->getQuote();
        $code = $quote->getPayment()->getMethodInstance()->getCode();
        if($code == 'my_payment'){
                $this->_setAmount(0);
                $this->_setBaseAmount(0);
                $items = $this->_getAddressItems($address);
                if (!count($items)) {
                    return $this; 
                }

                $exist_amount = $quote->getFeeAmount();
                //$fee = Excellence_Fee_Model_Fee::getFee(); 
                $fee=Mage::getStoreConfig('payment/my_payment/price');
                $balance = $fee - $exist_amount;
                $address->setFeeAmount($balance);
                $address->setBaseFeeAmount($balance);
                $quote->setFeeAmount($balance);
                $address->setGrandTotal($address->getGrandTotal() + $address->getFeeAmount());
                $address->setBaseGrandTotal($address->getBaseGrandTotal() + $address->getBaseFeeAmount());
        }
    } catch(Exception $e){}
}

Now only when user selects my payment method this fee would be added to totals