A proper Ubuntu 18.04 installation for running Ethereum node

Create a Hyper-V machine with a disk that is large enough:

And install Ubuntu 18.04.


What to mine on GTX 1060 3GB in November 2020

It is still possible to mine the following on GTX 1060 3GB in November 2020:

coindag sizeexchange

I did not receive a peak price from Binance

In my app I display prices that I receive from Binance STORJ/BTC trade stream (green color):


None of C++ compilers have heterogeneous lookup for unordered containers except MSVC

At 10/20/2020:

And std::vector is not constexpr yet:

And there is no text formatting also.



See C++20 library features compiler support.

Assignment a property of type function in QML

It is possible to do this in QML:

    property var refreshChart: function () {}

        refreshChart = function ()

Sample Binance API queries

Getting All Isolated Margin Symbols in PHP:

$api_key = "*****";
$secret = "*****";

$opt = [
    "http" => [
        "method" => "GET",
        "header" => "User-Agent: Mozilla/4.0 (compatible; PHP Binance API)\r\nX-MBX-APIKEY: {$api_key}\r\n"
$context = stream_context_create($opt);
$params['timestamp'] = number_format(microtime(true)*1000,0,'.','');
$query = http_build_query($params, '', '&');
$signature = hash_hmac('sha256', $query, $secret);
$endpoint = "https://api.binance.com/sapi/v1/margin/isolated/allPairs?{$query}&signature={$signature}";

$res = file_get_contents($endpoint, false, $context);
echo $res;

Brain collapsing rules in C++

Consider the declaration of a class that contains a lambda function or a reference to it:

#include <utility>

template <class Func>
struct Holder
    Holder(Func && func) : m_func(std::forward<Func>(func))

    Func m_func;

template <class Func>
auto MakeHolder(Func && func)
    return Holder<Func>(std::forward<Func>(func));

Setting Google AdMob Seller information

There is a new Seller information option in Google AdMob that may affect the advertising revenue. I set it up in Google AdMob Console on Settings page as follows:

See some link about this.

My first experiment with a peak detection algorithm

Hi guys!

For those how are interested in what I am doing now I provided my app screenshots with ‘Find Peaks’ button that runs ZScore algorithm on a cryptocurrency market data (follow the this link for the algorithm source code in C++).

Honestly I am not quite enough understand yet how it works, because I run it first time today, but at least there is some correlation between input parameters and the results. The lesser the threshold and the longer the lag the lesser peaks are found. Increasing the influence also reduces the peak count.


Publishing QT application in Apple App Store

I succeeded with building my app for iOS and my first step in publishing the app in App Store was opening generated .xcodeproj file in XCode, but XCode froze displaying rotating progress indicator and wait cursor.