Paypal Smart Button Check Postal Code onApprove - paypal

Question

The problem:
I am trying to figure out how to check the if postal code (entered during the paypal smart button check-out) meets specific requirements.
I have the createOrder, and onApprove object attributes I would like to check the postal code before i capture the payment so i can reject it, and cancel the order.
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:
[
{
description: "Raffle Tickets",
custom_id: $('#cartID').val(),
soft_descriptor: "soft_descriptor",
amount: {
currency_code: "CAD",
value: cartVal,
breakdown: {
item_total: {
currency_code: "CAD",
value: cartVal
}
}
},
items: itemList
}
]
});
},
onApprove: function(data, actions) {
//id like to check the postal code here, or maybe do an ajax call then on success, call the
//capture function below to finalize the payment.
// This function captures the funds from the transaction.
return actions.order.capture().then(function(details) {
// This function shows a transaction success message to your buyer.
$('#details').val(JSON.stringify(details));
$('#frmConfirm').submit();
});
}
}).render('#paypal-button-container');

Answer 1

return actions.order.get().then(function(data,actions) {
console.log(data);
/* if logic on data.payer.address.postal_code goes here */
actions.order.capture().then(function(details) {
$('#details').val(JSON.stringify(details));
$('#frmConfirm').submit();
}
});
You mentioned AJAX; there are server-side equivalent APIs, if you want to switch from this client-side implementation to one that uses code on the server to validate. In that case the front-end would look more like this: https://developer.paypal.com/demo/checkout/#/pattern/server , and there is a v2/orders API call to get the details of the approved order before capturing it.