How to generate PayPal order pay link to email - laravel

Question

I'm trying to generate PayPal link to email, where user can pay for their order later. I'am using paypal/rest-api-sdk-php. For example using this route:
Route::get('/order/pay/{hash}', 'Frontend\PaymentController#orderPay')->name('order.pay');
My code for payment creation works (see code). When user cancel the payment or payment is unsuccessful, how can I return to the incomplete transaction and try to pay for it again? Should I create new payment everytime user goes to order pay route? Or can I simply identify the incomplete transaction in PayPal and redirect to some(?) PayPal link then?
use PayPal\Api\Payer;
use PayPal\Api\Item;
use PayPal\Api\ItemList;
use PayPal\Api\Details;
use PayPal\Api\Amount;
use PayPal\Api\Transaction;
use PayPal\Api\RedirectURLs;
use PayPal\Api\Payment;
/*
* #param \App\Order $order
* #return string
*/
public function createPayment($order)
{
$transaction = $this->getTransactionByOrderHash($order->hash);
if ($transaction) {
if ($transaction->is_refunded) {
return 'Paymant has already been refunded';
}
if ($transaction->is_payed) {
return 'Paymant has already been payed';
}
}
$price = $order->to_pay;
$currencyCode = $order->currency->iso_code;
try {
$payer = new Payer();
$payer->setPaymentMethod('paypal');
$item = new Item();
$item
->setName(__('invoice.pfa_title'))
->setCurrency($currencyCode)
->setQuantity(1)
->setSku($order->vs)
->setPrice($price);
$itemList = new ItemList();
$itemList->setItems([$item]);
$details = new Details();
$details
->setShipping(0)
->setTax(0)
->setSubtotal($price);
$amount = new Amount();
$amount
->setCurrency($currencyCode)
->setTotal($price)
->setDetails($details);
$transaction = new Transaction();
$transaction
->setAmount($amount)
->setItemList($itemList)
->setInvoiceNumber(uniqid());
$redirectUrls = new RedirectUrls();
$redirectUrls
->setReturnUrl(route('paypal.success', $order->hash))
->setCancelUrl(route('paypal.cancel'));
$payment = new Payment();
$payment
->setIntent('sale')
->setPayer($payer)
->setRedirectUrls($redirectUrls)
->setTransactions([$transaction]);
$payment->create($this->apiContext);
$approvalUrl = $this->getApprovalUrl($payment);
if ($approvalUrl) {
session([
'approval_url' => $approvalUrl,
'transaction_id' => $payment->getId(),
]);
return 'payment was successful';
}
} catch (PayPalConnectionException $ex) {
return json_decode($ex->getData());
} catch (Throwable $e) {
return $e->getMessage();
}
return 'payment was unsuccessful';
}

Answer 1

Why use the deprecated v1/payments PayPal-PHP-SDK, instead of the current v2/checkout/orders Checkout-PHP-SDK ?
In any case, yes you can create a new Payment/Order object everytime the customer attempts a checkout. Just set the invoice_id field to your own same but unique invoice/order number for the thing that customer is paying for, so that if the customer does happen to be trying to make a duplicate payment attempt for such a # that has already resulted in a successful transaction on your PayPal account before, it will be blocked by default (according to your PayPal account settings)