Response object - Payment with Mollie and Omnipay - php

Question

I'm trying to create a payment with Omnipay and Mollie in my Laravel project. I'm using the following 2 libraries:
https://github.com/barryvdh/laravel-omnipay
https://github.com/thephpleague/omnipay-mollie
I'm doing the following in my code:
$gateway = Omnipay\Omnipay::create('Mollie');
$gateway->setApiKey('test_gSDS4xNA96AfNmmdwB3fAA47zS84KN');
$params = [
'amount' => $ticket_order['order_total'] + $ticket_order['organiser_booking_fee'],
'description' => 'Bestelling voor klant: ' . $request->get('order_email'),
'returnUrl' => URL::action('EventCheckoutController#fallback'),
];
$response = $gateway->purchase($params)->send();
if ($response->isSuccessful()) {
session()->push('ticket_order_' . $event_id . '.transaction_id',
$response->getTransactionReference());
return $this->completeOrder($event_id);
}
The payment works. When the payment is done he goes back to the function fallback. But I don't know what to put in this function and how to go back to the line if($response->isSuccesfull()...).
The most important thing I need to do after the payment is :
session()->push('ticket_order_' . $event_id . '.transaction_id',
$response->getTransactionReference());
return $this->completeOrder($event_id);
Can someone help me figure out how to work with the fallback function and above?

Answer 1

A typical setup using Mollie consists of three separate pages:
a page to create the payment;
a page where Mollie posts the final payment state to in the background; and
a page where the consumer returns to after the payment.
The full flow is described in the Mollie docs. Also take a look at the flow diagram at that page.
DISCLAIMER: I've never used Omnipay myself and did not test the following code, but it should at least give you an idea how to set up your project.
Creating the payment:
$gateway = Omnipay\Omnipay::create('Mollie');
$gateway->setApiKey('test_gSDS4xNA96AfNmmdwB3fAA47zS84KN');
$params = [
'amount' => $ticket_order['order_total'] + $ticket_order['organiser_booking_fee'],
'description' => 'Bestelling voor klant: ' . $request->get('order_email'),
'notifyUrl' => '', // URL to the second script
'returnUrl' => '', // URL to the third script
];
$response = $gateway->purchase($params)->send();
if ($response->isRedirect()) {
// Store the Mollie transaction ID in your local database
store_in_database($response->getTransactionReference());
// Redirect to the Mollie payment screen
$response->redirect();
} else {
// Payment failed: display message to the customer
echo $response->getMessage();
}
Receiving the webhook:
$gateway = Omnipay\Omnipay::create('Mollie');
$gateway->setApiKey('test_gSDS4xNA96AfNmmdwB3fAA47zS84KN');
$params = [
'transactionReference' => $_POST['id'],
];
$response = $gateway->fetchTransaction($params);
if ($response->isPaid()) {
// Store in your local database that the transaction was paid successfully
} elseif ($response->isCancelled() || $response->isExpired()) {
// Store in your local database that the transaction has failed
}
Page where the consumer returns to:
// Check the payment status of your order in your database. If the payment was paid
// successfully, you can display an 'OK' message. If the payment has failed, you
// can show a 'try again' screen.
// Most of the time the webhook will be called before the consumer is returned. For
// some payment methods however the payment state is not known immediately. In
// these cases you can just show a 'payment is pending' screen.