kosatyi

define('FONDY_MERCHANT_ID',0000000000);
define('FONDY_SECRET_KEY','1829381923919023918239819238');

add_action( 'rest_api_init', function () {
    register_rest_route( 'v1', '/checkout', [
        'methods' => 'POST',
        'callback' => 'coreicon_v1_checkout',
    ]);
});

kosatyi

    function $ipspReady(success, failure) {
        var win = window, doc = document, name = '$ipsp', tag = '$ipspScriptTag', head, script, 
            url = 'https://api.fondy.eu/static_common/v1/checkout/ipsp.js';
        if (name in win) return success(win[name]);
        if (tag in win) {
            script = win[tag];
        } else {
            head = doc.querySelector('head');
            script = doc.createElement('script');
            script.async = true;

kosatyi

(function(callback){
    var findParent = function (elem, selector) {
        if( !elem ) return null;
        var parent = elem.parentNode;
        if (parent.matches(selector)) return parent;
        return findParent(parent, selector);
    }
    var findQueryFrame = function(id){
        var selector = '[data-google-query-id="'+id+'"]';
        var frame    = document.querySelector(selector);

kosatyi

.checkout-form {
  max-width:325px;
  margin:0 auto;
}
.checkout-form-container{
  border:1px solid #ccc;
}
.checkout-form .error-wrapper{
  padding:.7em;
  color:#000000;

kosatyi

<?php
namespace Ipsp;
/**
 * Class Signature
 * @package Ipsp
 */
class Signature {
    /**
     * @var
     */