Magento 2 You can set additional data in payment using setAdditionalData( ) method defined under Quote Module Payment.php class.
Magento\Quote\Model\Quote\Payment class used for set payment related data from quote to order. This class is used for set payment method, additional data, and other payment-related data to Order.
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Void doesn’t close the order. After Void from Order, Payments have to be refunded to Payment Gateway. Still Voiding will let you create the offline invoice later.
Cancel, Cancel Order means to close the order. In Order canceled you can’t order to be modified after the cancel order.