For a specific order, I need to go directly to payment, with onepage system. For others orders, customer has to specify addresses and shipping method.
More details : A customer can create a quotation for marketplace order (processed with API). When quotation is validated, customer can order products with specific price. So I empty current cart to add these products, and customer is redirected to onepage. Addresses are specified in quotation so, customer will be redirected to payment page.
Any solution ?