Im creating a custom payment method on an Magento 2 website using SecurePay API. SecurePay Iframe Tokenise credit card and I will need that token to process the payment. So I follow many tutorials to add additional_data to payment but I never could get any data even with the Magento doc tutorial: devDocs

Here is my code :

securepay-method.js (in js/view/payment/method-renderer)

     * Get data
     * @returns {Object}
    getData: function () {
        var data = {
            'method': this.item.method,
            'additional_data': {
                'token': 'test'

        return data;

DataAssignObserver.php (Observer)


namespace Appscore\SecurePay\Observer;

class DataAssignObserver extends AbstractDataAssignObserver
const TOKEN = 'token';

 * @var array
protected $additionalInformationList = [

 * @param Observer $observer
 * @return void
public function execute(Observer $observer)
    $data = $this->readDataArgument($observer);

    $additionalData = $data->getData(PaymentInterface::KEY_ADDITIONAL_DATA);
    if (!is_array($additionalData)) {

    $paymentInfo = $this->readPaymentModelArgument($observer);

    foreach ($this->additionalInformationList as $additionalInformationKey) {
        if (isset($additionalData[$additionalInformationKey])) {


events.xml (etc)

<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Event/etc/events.xsd">
<event name="payment_method_assign_data_securepay">
    <observer name="securepay_gateway_data_assign" instance="Appscore\SecurePay\Observer\DataAssignObserver" />

SecurePay (Model)

 * Capture Payment.
 * @param \Magento\Payment\Model\InfoInterface $payment
 * @param float $amount
 * @return $this
public function capture(\Magento\Payment\Model\InfoInterface $payment, $amount)

    $info = $this->getInfoInstance();


This always return :

array (size=1)
'method_title' => string 'Secure Pay' (length=10)

I tried everything, Im really lost on this problem, If someone can help me on this one that would be really helpfull

Thanks by advance !


I finally got the solution

just add in your model :

 * Set value after save payment from post data to use in case capture or authorize
 * @param \Magento\Framework\DataObject $data
 * @return $this
public function assignData(\Magento\Framework\DataObject $data)
    $this->getInfoInstance()->setAdditionalInformation('post_data_value', $data->getData());

    return $this;

Hope that can help someone !


This is still valid for 2.3.5. I just extended a NAB transact extension to display and pass a reCaptcha token to the model. Thanks :)

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