public function createBillingPlan($cartSummary, $productName, $transactionId, $apiContext)
{
$billingPlanDefaultValues = $this->getBillingPlanDefaultValues();
$billingPlan = new Plan();
$billingPlan->setName('Payment plan for ' . $productName);
$billingPlan->setDescription($cartSummary->paymentPlanTitle);
$billingPlan->setType($billingPlanDefaultValues->type);
$paymentDefinition = new PaymentDefinition();
$paymentDefinition->setName('Charge for ' . $productName);
$paymentDefinition->setType('REGULAR');
$paymentDefinition->setFrequencyInterval($billingPlanDefaultValues->interval);
$paymentDefinition->setFrequency($billingPlanDefaultValues->frequency);
$paymentDefinition->setCycles($billingPlanDefaultValues->cycle);
$amount = new Currency();
$amount->setCurrency($this->getCurrency());
$amount->setValue($cartSummary->singleInstallmentCost);
$paymentDefinition->setAmount($amount);
$shippingAmount = new Currency();
$shippingAmount->setCurrency($this->getCurrency());
// Shipping cost is taken out in the initial payment (setup_fees)
$shippingAmount->setValue(0);
//$shippingAmount->setValue($cartSummary->shippingCost);
$chargeModelShipping = new ChargeModel();
$chargeModelShipping->setType('SHIPPING');
$chargeModelShipping->setAmount($shippingAmount);
$taxAmount = new Currency();
$taxAmount->setCurrency($this->getCurrency());
$taxAmount->setValue($cartSummary->vat);
$chargeModelTax = new ChargeModel();
$chargeModelTax->setType('TAX');
$chargeModelTax->setAmount($taxAmount);
$paymentDefinition->setChargeModels(array($chargeModelShipping, $chargeModelTax));
$billingPlan->setPaymentDefinitions(array($paymentDefinition));
$merchantPreferences = new MerchantPreferences();
$setupFeesAmount = new Currency();
$setupFeesAmount->setCurrency($this->getCurrency());
$setupFeesAmount->setValue($cartSummary->firstInstallmentCost);
/* PayPal just passes a token in the return Url. This token is unique for each request. So pass the transection id in the return Url. */
$returnUrl = $this->getRecurringExpressPaymentReturnUrl();
$returnUrl = str_replace(':id', $transactionId, $returnUrl);
$returnUrl = str_replace(':hash', Om_Model_Abstract::generateRequestHash($transactionId), $returnUrl);
$merchantPreferences->setSetupFee($setupFeesAmount);
$merchantPreferences->setCancelUrl($this->getCancelUrl());
$merchantPreferences->setReturnUrl($returnUrl);
$merchantPreferences->setMaxFailAttempts($billingPlanDefaultValues->maxFailedBillingAttempts);
$merchantPreferences->setAutoBillAmount($billingPlanDefaultValues->autoBillAmount);
$merchantPreferences->setInitialFailAmountAction($billingPlanDefaultValues->initialFailAmountAction);
$billingPlan->setMerchantPreferences($merchantPreferences);
return $billingPlan->create($apiContext);
}