Additional fees (subtotal) not transmitted to checkout paiement gateway

-- HikaShop version -- : 4.2.1
-- Joomla version -- : 3.9.11
-- PHP version -- : 7.2.20

Hello,

I'm making a specific « donation » plugin. I think all working well, with trigger onAfterCartProductsLoad(&$cart) for adding $cart->additonal amount of donation like this :

$cartClass=hikashop_get('class.cart');
$currencyClass = hikashop_get('class.currency');
$currency_id = hikashop_getCurrency();


$donation = new stdClass();
$donation->name = 'Don '.$this->params->get('title', 'Don Caritatif');
// $additional->value = '';
$donation->price_currency_id = $currency_id;
$donation->price_value = floatval($amount);
$donation->price_value_with_tax = floatval($amount);

$cart->additional[$this->name]=$donation;
$cartClass->save($cart);

the $cart is successfully saved on db, but on next step, to the payment gateway, amount of donation not added on final total to pay and when I cancel or return to the cart, the additional amount of donation is missing... (on db too).

What's wrong ?

Thank-you in advance for your help.

Hi Nicolas,

Thank-you for your response. I think the probleme is at my level, after checking the orders test, I can't see my additonal fees and order_full_price is correct without them. maybe I must adding a trigger function onBeforeOrderCreate(&$order, &$do) to add my additinal fees ?

my code is largely inspired from userpoint plugin :

function onAfterCheckoutStep($controllerName, &$go_back, $original_go_back, &$controller) {

if($controllerName != 'plg.shop.donation')
			return;
		
		
		
		$app = JFactory::getApplication();
		$amount = $_REQUEST['donation'];
		
		$app->setUserState(HIKASHOP_COMPONENT.'.donation_value', $amount);
		
		
		$checkoutHelper = hikashopCheckoutHelper::get();
		
		$cart = $checkoutHelper->getCart();
		$cart_id = (int)$cart->cart_id;

		
		
	
		$cart = $checkoutHelper->getCart();
		$cart_id = (int)$cart->cart_id;
		unset($cart);

		$cartClass = hikashop_get('class.cart');
		$cartClass->get('reset_cache', $cart_id);
		$cartClass->getFullCart($cart_id);
		$cart = $checkoutHelper->getCart(true);

		$cartClass->save($cart);
		
		
		
		
		return true;
		
		
	}

Thank-you Nicolas,

Because I wanted to refresh (in ajax) view of current checkout step in page (donation block and cart details), the only way I've found is with function onAfterCheckoutStep trigger and job is done with onAfterCartProductsLoad function where I get my session variable $amount.

I'm just understanding how it work and now it's perfect. Thank-you for your help.

Regards,