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Mina Monitor — convenient monitoring your Mina nodes

Open source *JavaScript *Cryptocurrencies

My name is Serhii Pimenov. I’m a web developer from Kyiv, Ukraine (maybe you know me by the nickname olton).

Today I'm going to speak about one of my tools for the Mina blockchain - “Mina Monitor”. It’s the first article in the series about Mina and Mina Tools. In this article, I will introduce you to my tool for monitoring the Mina nodes.

Let's start
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How to setup TON (The Open Network) validator

Cryptocurrencies
Tutorial
The The Open Network (TON) is a fast, secure and scalable blockchain and network project, capable of handling millions of transactions per second.

It was originally introduced by Telegram and called Telegram Open Network. Unfortunately, in May 2020, they announced the closure of the project due to the US court decision. Right after that, three different organizations announced their intentions to continue work on the blockchain: TON Labs, NewTON (TON Foundation), and the Chinese TON community.


In early August, the Telegram team transferred the original repository on GitHub, as well as the ton.org domain, to the open developer community of the TON Foundation.


You can read more about it here.


Introduction


In this tutorial, you will learn how to set up & run a TON validator using mytonctrl on Ubuntu. Note that, it is only dedicated to validators on the NewTON (TON Foundation) blockchain.

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Total votes 6: ↑6 and ↓0 +6
Views 1.4K
Comments 0

Atomic Swaps — Taking out the Middleman

Cryptocurrencies

And so here we find ourselves in the year of our lord 2021. Global crypto market capitalization is approaching $2 trillion. PayPal is launching a crypto checkout service. Lindsay Lohan is shilling Tron. The Dogecoin Super Bowl commercial didn’t happen, but Elon’s taking it “literally” to the moon instead. Our ascendancy is complete. Crypto is mainstream. But, even today, getting your hands on certain crypto assets can be a bit of an epic journey. 

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5 Thought-Provoking Use Cases Of Blockchain In Diverse Industries

Decentralized networks Cryptography *Habr Infographics Cryptocurrencies

Blockchain is a decentralized technology that maintains a record of all transactions occurring over a peer-to-peer network. Due to Blockchain's several different high-level use cases, numerous industries described Blockchain as the 'magic beans.' 

Blockchains store the record in a decentralized system that is interconnected. This technology lessens vulnerability and enhances transparency in all industrial sectors as information is stored digitally, and it does not have any centralized point to carry out the transactions.

Do You Know?

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Total votes 1: ↑0 and ↓1 -1
Views 472
Comments 1

Top 10 Blockchain Development Companies To Partner With In 2020-21

Development of mobile applications *Development for Android *Start-up development Offices of IT companies Cryptocurrencies
image

Global Blockchain solutions spending is expected to surpass $15.9 billion in 2023. At the same time, this expenditure was $1.5 billion in 2018. Indeed, this is a huge influx in global spending, which depicts how companies will be investing more in blockchain solutions and blockchain-based mobile apps.

In this group, the major contribution will be seen from industries including finance, banking, healthcare, agriculture, and more. Amidst, outsourcing Blockchain development companies will also gain prominent attention.

If you are thinking about having Blockchain integration within your business solution, you must be having several questions in your mind, such as: what are the benefits of blockchain? Which are the best companies to hire? And more.
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Total votes 1: ↑0 and ↓1 -1
Views 985
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How to develop and publish a smart-contract in the Telegram Open Network (TON)

Decentralized networks Cryptography *Finance in IT Cryptocurrencies

What is this article about?


In this article, I will tell about my participation in the first (out of two so far) Telegram blockchain contest. I didn't win any prize. However, decided to combine and share the unique experience from the start to finish line, so my observations could help anyone who is interested.


Since I didn't want to write some abstract code, instead make something useful. I created instant lottery smart-contract and website which shows smart-contract data directly from Telegram Open Network (TON) avoiding transitional storage.


The article will be particularly useful for those, who want to write their first smart-contract in TON but has difficulties where to start.


Using the lottery smart-contract as an example, I will show the path from the environment set up till publication of the smart-contract and its interaction. Moreover, I will create a website that will show smart-contract data.

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Views 1.7K
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Future economics for physicists

Research and forecasts in IT Physics Science fiction Cryptocurrencies The future is here

Annotation. This article gives an analogy between the forces of nature and various types of money. A justification for the "money conservation laws" is made. Explanation of the IT-money phenomenon by analogy to physics laws is given, as well as gold and currency money. The transition from the gold and currency to the gold-currency-computing economy is considered. A reasonable assumption is made that the fourth type of money after gold, securities and IT money will be so-called "citation indices" or "ratings", which are similar in their properties to stock indices.


What is money?


This article is an attempt to understand what money is from the physics and econophysics points of view. Econophysics (economics and physics) is an interdisciplinary research field, applying theories and methods originally developed by physicists to solve problems in economics, usually those including uncertainty or stochastic processes, nonlinear dynamics and evolutionary games.

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Total votes 1: ↑0 and ↓1 -1
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9 Key Benefits Of Blockchain Technology In Sports Software

Cryptography *Cryptocurrencies
image

There are numerous benefits provided by blockchain technology for sports betting software. The nine key benefits are detailed below.

Security of Blockchain

When this technology is integrated into sports betting software, there is a permanent and unchangeable record in the transaction ledger providing transparency. Sportsbooks must be certain their betting data is delivered safely with all bets resolved correctly and quickly. This technology provides significantly better protection through the use of smart contracts. Decentralized actors handle the wagers with the smart contracts being executed automatically. Publicly written data cannot be altered. The complex system of the past is simplified and performed for much less than the traditional costs. Blockchain Development Services, Blockchain Solutions are paramount not only in sports betting but every aspect of the new business world. Blockchain technology experts integrate cryptocurrency payment solutions, program smart contracts, and engineer blockchain networks and apps.

This provides better protection, flawless bet execution, enhanced data security, and complete information transparency. The use of cryptocurrency significantly decreases the fees for payment processing. This reduces the margins for the sportsbook while offering players an increased chance to win. Once the bets have been resolved with a smart contract, the funds will be in the wallet of the better for almost immediate withdrawal. Any issues for even larger amounts are eliminated due to cryptocurrency payouts.

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How to Write a Smart Contract with Python on Ontology? Part 4: Native API

Cryptography *Python *DevOps *Distributed systems *Cryptocurrencies
Tutorial
image

Earlier, I have introduced the Ontology Smart Contract in
Part 1: Blockchain & Block API and
Part 2: Storage API
Part 3: Runtime API
Today, let’s talk about how to invoke an Ontology native smart contract through the Native API. One of the most typical functions of invoking native contract is asset transfer.
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Total votes 5: ↑5 and ↓0 +5
Views 1.1K
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How to Write a Smart Contract with Python on Ontology? Part 3: Runtime API

Cryptography *Python *Programming *DevOps *Cryptocurrencies
Tutorial
image

Introduction


Earlier, I have introduced the Ontology Smart Contract in
Part 1: Blockchain & Block API and
Part 2: Storage API
Now when you have an idea about how to call the relevant API for persistent storage when developing Python smart contract on Ontology, let’s go on to Runtime API (Contract Execution API). The Runtime API has 8 related APIs that provide common interfaces for contract execution and help developers get, convert, and validate data. Here’s a brief description of these 8 APIs:
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How to Write a Smart Contract with Python on Ontology? Part 2: Storage API

Python *Programming *DevOps *Distributed systems *Cryptocurrencies
Tutorial
image
This is an official tutorial published earlier on Ontology Medium blog
Excited to publish it for Habr readers. Feel free to ask any related questions and suggest a better format for tutorial materials

Foreword


Earlier, in Part 1, we introduced the Blockchain & Block API of Ontology’s smart contract. Today we will discuss how to use the second module: Storage API. The Storage API has five related APIs that enable addition, deletion, and changes to persistent storage in blockchain smart contracts. Here’s a brief description of the five APIs:
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How to Write a Smart Contract with Python on Ontology? Part 1: the Blockchain & Block API

Python *Distributed systems *Cryptocurrencies
Sandbox
image

This is an official tutorial published earlier on Ontology Medium blog
Excited to publish it for Habr readers. Feel free to ask any related questions and suggest a better format for tutorial materials

Foreword


In this article, we will begin to introduce the smart contract API of Ontology. The Ontology’s smart contract API is divided into 7 modules:


In this article, we will introduce the Blockchain & Block API, which is the most basic part of the Ontology smart contract system. The Blockchain API supports basic blockchain query operations, such as obtaining the current block height, whereas the Block API supports basic block query operations, such as querying the number of transactions for a given block.

Let’s get started!

First, create a new contract in SmartX and then follow the instructions below.

1. How to Use Blockchain API


References to smart contract functions are identical to Python’s references. Developers can introduce the appropriate functions as needed. For example, the following statement introduces GetHeight, the function to get the current block height, and GetHeader, the function to get the block header.
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Total votes 20: ↑18 and ↓2 +16
Views 1.9K
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Blockchain RSA-based random

Waves corporate blog Decentralized networks Cryptography *Cryptocurrencies
There’s a problem we needed to address in the course of developing our games. It’s complicated to generate a random number in a distributed network. Almost all blockchains have already faced this issue. Indeed, in networks where there is no trust between anyone, the creation of a random number solves a wide range of problems.

In this article, we explain how we solved this problem for our games. The first of these was Waves Xmas Tree.



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Total votes 13: ↑13 and ↓0 +13
Views 1.2K
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The Data Structures of the Plasma Cash Blockchain's State

Information Security *Cryptography *Programming *Cryptocurrencies
Tutorial


Hello, dear Habr users! This article is about Web 3.0 — the decentralized Internet. Web 3.0 introduces the concept of decentralization as the foundation of the modern Internet. Many computer systems and networks require security and decentralization features to meet their needs. A distributed registry using blockchain technology provides efficient solutions for decentralization.
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Total votes 9: ↑9 and ↓0 +9
Views 931
Comments 0

How to make possible micro-payments in your app

Decentralized networks Open source *Payment systems *Programming *Cryptocurrencies
Sandbox
Tutorial

This week I spent coding my very first public pet-app based on Telegram chat bot which acts as a Bitcoin wallet and allows to send and receive tips between Telegram users and other so-called “Lightning Apps”. I assume that you are familiar with Bitcoin & Telegram in general, i’ll try to post short and without deep jump into details. More resources about Bitcoin can be found here and Telegram is simply an instant messenger that allows you to create your custom apps (chat-bots) using their platform.


What are the key points of such app?


  • Allows to rate other users ideas and answers with real value instead of
    ‘virtual likes’. This brings online conversation to completely new level
  • Real example of working micro-payment app which can act with other entities
    over internet using open protocol
  • All the modules are open-source projects and can be easy re-used and adjusted
    for your own project. App does not relay on third-party commercial services.
    Even it falls under e-commerce field, which is currently almost closed, the app
    is based on open solutions.

What are the use-cases?


something like this…

image
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Total votes 12: ↑11 and ↓1 +10
Views 3.5K
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Version 12 Launches Today! (And It’s a Big Jump for Wolfram Language and Mathematica)

Wolfram Research corporate blog Programming *Mathematics *Machine learning *Cryptocurrencies


Quick links


The Road to Version 12
First, Some Math
The Calculus of Uncertainty
Classic Math, Elementary and Advanced
More with Polygons
Computing with Polyhedra
Euclid-Style Geometry Made Computable
Going Super-Symbolic with Axiomatic Theories
The n-Body Problem
Language Extensions & Conveniences
More Machine Learning Superfunctions
The Latest in Neural Networks
Computing with Images
Speech Recognition & More with Audio
Natural Language Processing
Computational Chemistry
Geographic Computing Extended
Lots of Little Visualization Enhancements
Tightening Knowledgebase Integration
Integrating Big Data from External Databases
RDF, SPARQL and All That
Numerical Optimization
Nonlinear Finite Element Analysis
New, Sophisticated Compiler
Calling Python & Other Languages
More for the Wolfram “Super Shell”
Puppeting a Web Browser
Standalone Microcontrollers
Calling the Wolfram Language from Python & Other Places
Linking to the Unity Universe
Simulated Environments for Machine Learning
Blockchain (and CryptoKitty) Computation
And Ordinary Crypto as Well
Connecting to Financial Data Feeds
Software Engineering & Platform Updates
And a Lot Else…

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Total votes 9: ↑9 and ↓0 +9
Views 2.3K
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WavesKit — PHP framework for working with Waves Platform

Decentralized networks Programming *Cryptocurrencies

I like PHP for development speed and excellent portability. It's great to have such a tool in your pocket, always ready to solve problems.


For me it was quite sad that there was no Waves Platform SDK for PHP when i first met this nice blockchain. Well, I had to write such kit.

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Total votes 12: ↑8 and ↓4 +4
Views 1.7K
Comments 0

Bitcoin (BTC)’s Low Volatility Will Lead to the Next Crypto Bull Run

Cryptocurrencies
Recovery mode
Curiosity has taken over the crypto space. Every enthusiast and potential trader wants to know when the next crypto bull run will start. The digital currency reached an all-time high in December 2017 and since then, it has been stuck in a crypto winter.

As well all know, Bitcoin, is the highest rising digital asset of all time. This is partly because of Bitcoin’s speculative nature, unlimited potential, and its built-in difficulty adjustment designed to throw off the elements of supply and demand to create a balance. This increases the Bitcoin price against the USD in return. It is a major reason why the leading digital currency can potentially initiate the next crypto bull run.

Bitcoin (BTC) Price Today – BTC / USD
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Total votes 9: ↑6 and ↓3 +3
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