Apply fee for Paypal Payment only for a customer group

Question

i would like to apply a 3% Fee if customer selects Paypal as payment method and if customer is a reseller. If the customer is a normal customer(and not a reseller) the fee should not be applied. Have you got suggestions on how to do so? Could i start from an existing plugin?

Answer 1

Step1: Here add module which is set extra free using http://www.classyllama.com/blog/unravelling-magentos-collecttotals-example

Step2:an do some change

public function collect(Mage_Sales_Model_Quote_Address $address)
{
    parent::collect($address);

    foreach ($this->_getAddressItems($address) as $item) {
            $this->_applyItemSurcharge($item,$address->getQuote());
    }

    return $this;
}

protected function _applyItemSurcharge($item,$Quote)
{
    $baseSurcharge = 0;
    if($Quote->getPayment()->getMethod()=='paypal_strandard' &&($Quote->getCustomerGroupId()=='reatialergroupcode')){

    $baseSurcharge =$address->getBaseGrandTotal()*3;
    }

    $surcharge = Mage::app()->getStore()->convertPrice($baseSurcharge);

    $item->setBaseCustomSurchargeAmount($baseSurcharge);
    $item->setCustomSurchargeAmount($surcharge);

    $this->_addBaseAmount($baseSurcharge);
    $this->_addAmount($surcharge);
}