gistfile1.txt

<script src="https://js.braintreegateway.com/v2/braintree.js"></script>
<form id="form" action="chargeCustomer.php" method="POST">
</form>
<div id="paypal-container"></div>
<script type="text/javascript">
braintree.setup("<?php echo($gateway->clientToken()->generate());?>", "custom", {
  paypal: {
    container: "paypal-container",
    singleUse: true, // Required
    amount: 10.00, // Required
    currency: 'USD', // Required
    locale: 'en_us',
    enableShippingAddress: 'true',
    shippingAddressOverride: {
      recipientName: 'Scruff McGruff',
      streetAddress: '1234 Main St.',
      extendedAddress: 'Unit 1',
      locality: 'Chicago',
      countryCodeAlpha2: 'US',
      postalCode: '60652',
      region: 'IL',
      phone: '123.456.7890',
      editable: false
    }
  },
  onPaymentMethodReceived: function (obj) {
   var input = document.createElement('input');
    input.type = 'hidden';
    input.name = '$_POST['payment_method_nonce']';
    input.value = obj.nonce;
    document.getElementById('form').appendChild(input);
    document.getElementById('form').submit()
  }
});
</script>