hpool daily estimation

hpool daily estimation.user.js

// ==UserScript==
// @name         hpool daily estimation
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  tried to give a monetary value to your daily mining
// @author       Ruben Fernandes (Rauven)
// @match        https://www.hpool.com/*
// @icon         https://www.google.com/s2/favicons?domain=hpool.com
// @grant        none
// @require http://code.jquery.com/jquery-3.4.1.min.js
// ==/UserScript==

(function() {
    'use strict';
    $.getJSON( "https://api.exchangerate-api.com/v4/latest/USD", json => {
    let _conversion = json.rates.SGD,
        _currentPrice, _avg, _count, _mint, _maxt, _loopy, _page, _cb_final, _cb_loop, _wid, _daily, _text;

    function _chiaExt(){
        $.getJSON( "https://api2.chiaexplorer.com/blockchainSummary", json => {
            _avg = 0;
            _count = 0;
            _mint = false;
            _maxt = false;
            _currentPrice = json.price;
            _page = 1;
            _cb_final = ()=>{
                _text = [];

                _avg = (_avg / (_maxt - _mint)) * 60 * 60 * 24;
                _daily = _avg.toFixed(6);
                _wid = (0.2 / _avg).toFixed(1);

                _text.push(`Aprox. ${_daily} xch/day`);

                _avg = (_currentPrice * _avg * _conversion).toFixed(2);

                if(!$('._chiaExt').length){
                    $('<h5>',{class:'_chiaExt'}).appendTo('.h-menu-nav h4');
                }

                _text.push(`Aprox. S$${_avg}/day`);
                _text.push(`Withdrawal: ${_wid} days`);

                $('._chiaExt').html(_text.join('<br>'));
            };
            _cb_loop = ()=>{
                $.getJSON(window.location.origin+`/api/pool/miningdetail?language=en&type=chia&count=100&page=${_page}`, json => {
                    _loopy = false;
                    json.data.list.forEach(ea=>{
                        if(!ea.status){
                            _loopy = true;
                            _avg += parseFloat(ea.block_reward);
                            _count ++;
                            if(_mint === false || _mint > ea.record_time) _mint = ea.record_time;
                            if(_maxt === false || _maxt < ea.record_time) _maxt = ea.record_time;
                        }
                    });

                    if(_loopy){
                      _page ++;
                      _cb_loop();
                    }else{
                      _cb_final();
                    }
                });
            };

            _cb_loop();

        });
    }

    $(document)
    .on('click','._chiaExt',_chiaExt);

    _chiaExt();
    })
})();