I want to alter a product price (for example saved at 0.70€ in store). I pulled the hair several hours to find how to change the unit price (and the impact on the total price by changing the quantity) when putting the cart and / or from the time we are on the cart .
In fact, I need a base price, and according to certain client I modified by an external data (webservice). This modified price should not be saved but just used to that moment until the checkout process is complete.
In everything I tried, including the hook_commerce_cart_line_item_refresh() the price is never changed.
An idea to save me?