/**
  * @param Observer $observer
  * @return void
  */
 public function execute(Observer $observer)
 {
     $dataObject = $this->readDataArgument($observer);
     $additionalData = $dataObject->getData(PaymentInterface::KEY_ADDITIONAL_DATA);
     if (!is_array($additionalData) || !isset($additionalData[PaymentTokenInterface::PUBLIC_HASH])) {
         return;
     }
     $tokenPublicHash = $additionalData[PaymentTokenInterface::PUBLIC_HASH];
     if ($tokenPublicHash === null) {
         return;
     }
     /** @var Payment $paymentModel */
     $paymentModel = $this->readPaymentModelArgument($observer);
     if (!$paymentModel instanceof Payment) {
         return;
     }
     $quote = $paymentModel->getQuote();
     $customerId = $quote->getCustomer()->getId();
     if ($customerId === null) {
         return;
     }
     $paymentToken = $this->paymentTokenManagement->getByPublicHash($tokenPublicHash, $customerId);
     if ($paymentToken === null) {
         return;
     }
     $paymentModel->setAdditionalInformation(Vault::TOKEN_METADATA_KEY, [PaymentTokenInterface::CUSTOMER_ID => $customerId, PaymentTokenInterface::PUBLIC_HASH => $tokenPublicHash]);
 }
 /**
  * @inheritdoc
  * @throws \Exception
  */
 public function execute(array $commandSubject)
 {
     $publicHash = $this->subjectReader->readPublicHash($commandSubject);
     $customerId = $this->subjectReader->readCustomerId($commandSubject);
     $paymentToken = $this->tokenManagement->getByPublicHash($publicHash, $customerId);
     if (!$paymentToken) {
         throw new Exception('No available payment tokens');
     }
     $data = $this->adapter->createNonce($paymentToken->getGatewayToken());
     $result = $this->responseValidator->validate(['response' => ['object' => $data]]);
     if (!$result->isValid()) {
         throw new Exception(__(implode("\n", $result->getFailsDescription())));
     }
     return $this->resultFactory->create(['array' => ['paymentMethodNonce' => $data->paymentMethodNonce->nonce]]);
 }
 /**
  * @param OrderPaymentInterface $orderPayment
  * @return void
  */
 private function attachTokenExtensionAttribute(OrderPaymentInterface $orderPayment)
 {
     $additionalInformation = $orderPayment->getAdditionalInformation();
     $tokenData = isset($additionalInformation[self::TOKEN_METADATA_KEY]) ? $additionalInformation[self::TOKEN_METADATA_KEY] : null;
     if ($tokenData === null) {
         throw new \LogicException("Token metadata should be defined");
     }
     $customerId = $tokenData[PaymentTokenInterface::CUSTOMER_ID];
     $publicHash = $tokenData[PaymentTokenInterface::PUBLIC_HASH];
     $paymentToken = $this->tokenManagement->getByPublicHash($publicHash, $customerId);
     if ($paymentToken === null) {
         throw new \LogicException("No token found");
     }
     $extensionAttributes = $this->getPaymentExtensionAttributes($orderPayment);
     $extensionAttributes->setVaultPaymentToken($paymentToken);
 }