web apple pay payment not completed issue ?

**my code is running , when i tried to pay but payment not completed issue ? **

if (window.ApplePaySession) {

  var hasActiveCard = window.ApplePaySession.canMakePaymentsWithActiveCard("merchant.com.applepaydemo.honemedia");

  //var paymentAmount = "20.00";
  var taxRequired = false;
  var paymentTaxAmount = "0.00";
  var shippingRequired = false;
  var paymentShippingAmount = "5.00";

  var appleButton = document.querySelectorAll(".appleButton");
  for (i = 0; i < appleButton.length; i++) { 
    appleButton[i].style.display = "block";
    appleButton[i].onclick = function() {
      checkout();
    }
  }

  if(!hasActiveCard) {
    for (i = 0; i < appleButton.length; i++) { 
      appleButton[i].classList.add("setup");
    }
  }

}

function checkout() {

  if (!hasActiveCard) {
    window.ApplePaySession.openPaymentSetup("merchant.com.applepaydemo.honemedia")
      .then(function(success) {
      if (success) {
        // Open payment setup successful
      } else {
        // Open payment setup failed
      }
    })
      .catch(function(e) {
      // Open payment setup error handling
    });
    return;
  }

  var paymentData = {
    countryCode: "US",
    currencyCode: "USD", //CAD, JPY, EUR, CNY, INR, MXN, KRW, XBC (bitcoin)
    merchantCapabilities: ["supports3DS", "supportsCredit", "supportsDebit"],
    supportedNetworks: ["amex", "discover", "masterCard", "visa"],
    requiredBillingContactFields: ['email'], //email or postalAddress or all
    total: {
      label: "Apple Pay Session Demo",
      amount: "25.00"
    },
    lineItems: [{
      label: "Subtotal",
      amount: "20.00"
    },{
      label: "Standard Shipping",
      amount: "5.00"
    }],

    shippingType: 'shipping', //shipping, delivery, storePickup, or servicePickup.
    requiredShippingContactFields: ["postalAddress"], //postalAddress, name, phone, email or all
    shippingMethods: [{
      label: "Standard Shipping",
      amount: "5.00",
      detail: "5-10 days",
      identifier: 'standard'
    }, {
      label: "Express Shipping",
      amount: "15.00",
      detail: "1-3 days",
      identifier: 'express'
    }]
  }

  var paySession = new ApplePaySession(2, paymentData); 
  //console.log("Supports API v2: " + window.ApplePaySession.supportsVersion(2))

  paySession.oncancel = function(event) {
    //console.log('ApplePaySession oncancel ' + event);
  }
  
  // Merchant Validation
  paySession.onvalidatemerchant = function(event) {
    var promise = performValidation(event.validationURL);
    promise.then(function(merchantSession) {
      paySession.completeMerchantValidation(merchantSession);
    });
  }
  function performValidation(valURL) {
    return new Promise(function(resolve, reject) {
      var xhr = new XMLHttpRequest();
      xhr.onload = function() {
        var data = JSON.parse(this.responseText);
        //console.log("data returned from validate_apple_pay.php: " + data);
        resolve(data);
      };
      xhr.onerror = reject;
      xhr.open("GET", "https://honemedia.com/applepay/gateway/validate_apple_pay.php" + "?url=" + valURL);
      xhr.send();
    });
  }

  paySession.onshippingmethodselected = function(event) {
    var newShippingLabel = event.shippingMethod.label;
    var updatedShippingCost = event.shippingMethod.amount;

    alert((Number(updatedShippingCost) + 20.00).toString())
    var newTotal = {
      type: "final",
      label: "Apple Pay Session Demo",
      amount: (Number(updatedShippingCost) + 20.00).toString()
    };
    var newLineItems = [{
      type: 'final',
      label: "Subtotal",
      amount: "20.00"
    }, {
      type: 'final',
      label: newShippingLabel,
      amount: updatedShippingCost
    }];

    paySession.completeShippingMethodSelection(ApplePaySession.STATUS_SUCCESS, newTotal, newLineItems);
  }


  paySession.onpaymentauthorized = function(event) {
    //console.log(event);
    var paymentTransactionIdentifier = event.payment.token.transactionIdentifier;

    var paymentTransactionEncryption = event.payment.token.paymentData.version; //EC_v1 - elliptic curve cryptography
    var paymentTransactionData = event.payment.token.paymentData.data;
    var paymentTransactionSignature = event.payment.token.paymentData.signature;

    var paymentTransactionHeader = event.payment.token.paymentData.header;
    var paymentEphemeralPublicKey = paymentTransactionHeader.ephemeralPublicKey;
    var paymentPublicKeyHash = paymentTransactionHeader.publicKeyHash;
    var paymentTransactionId = paymentTransactionHeader.transactionId;

    var shippingContact = event.payment.shippingContact.emailAddress; //could be address or could be email
    var billingContact = event.payment.billingContact;

    var cardPayerAddress = event.payment.shippingContact.addressLines[0];
    var cardPayerState = event.payment.shippingContact.administrativeArea;
    var cardPayerCountry = event.payment.shippingContact.country;
    var cardPayerCountryCode = event.payment.shippingContact.countryCode;
    var cardPayerFirstName = event.payment.shippingContact.givenName;
    var cardPayerLastName = event.payment.shippingContact.familyName;
    var cardPayerCity = event.payment.shippingContact.locality;
    var cardPayerPostalCode = event.payment.shippingContact.postalCode;

    var cardDisplayName = event.payment.token.paymentMethod.displayName;
    var cardProvider = event.payment.token.paymentMethod.network;
    var cardType = event.payment.token.paymentMethod.type;

    var paymentToken = event.payment.token;
    var cardPayerEmailAddress = event.payment.shippingContact.emailAddress;
    
    processPayment(paymentToken,cardPayerEmailAddress, this);
  }
  

  
  // All the payment data and handlers are setup - show the Payment Sheet UI
  paySession.begin();
  
}


/* Pass the paymentResponse values to a server side script and pass the data to payment gateway service */
function processPayment(paymentToken,payerEmail,paymentSession){
  //console.log("TOKEN: " + paymentToken);
  var httpc = new XMLHttpRequest();
  httpc.open("POST","https://honemedia.com/applepay/gateway/gateway_stripe_applepay.php", true);
  httpc.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
  httpc.onreadystatechange = function() {
    if (httpc.readyState == 4 && httpc.status == 200) {
      console.log("RESPONSE: " + httpc.responseText);
      paymentSession.completePayment(httpc.responseText == "success" ? ApplePaySession.STATUS_SUCCESS : ApplePaySession.STATUS_FAILURE);
    }
  }
  httpc.send(
    ('paymentAmount=' + "25.00") +
    ('&token=' + paymentToken) + 
    ('&payerEmail=' + payerEmail)
  );
}