So I am trying to create a ecommerce website with paypal api. I am new to paypal php sdk and I wanted to know how to secure the transaction and avoid that the user changes the amount paid.I saw this exemple code on the paypal docs:
paypal.Buttons({ createOrder: function(data, actions) { // This function sets up the details of the transaction, including the amount and line item details. return actions.order.create({ purchase_units: [{ amount: { value: '0.01' }// I am searching for a way to get this }] }); }, onApprove: function(data, actions) { //call api to verify the order } }).render('#paypal-button-container');It works fine but I know that using javascript is not a good idea because the user can edit the informations of the order. What is the technique to use a mix of javascript and php to verify that the user is not going to change the order ?