Power abuse is the problem that we encounter every day in many forms:

censorship on social networks, video hostings, and media. I like the theory that your mind is made from the content you consume in the same way your body is made from nutrients you consume. If you eat lots of fast food — you’ll feel sick. Similarly, if you consume some low-quality content — your mind might feel dizzy. On social networks all content is created by users and consumed by users, host corporations only facilitate infrastructure but get a disproportionate amount of benefits of the network. Now…


  • source-code of Uniswap v2 dex allows the possibility of stealing funds which directly sent to the pool contracts before calls of sync function
  • we found an exploiter who steals tens of thousands of dollars from PancakeSwap (clone of uniswap on binance smartchain) and currently active for 3 weeks
  • in this article, we show details on the exploit and how it’s possible to void it, Sers


Recent news about a Uniswap/SushiSwap clone on a binance smart chain called Uranium (link) for 55M highlighted a question: what other DEX clones are possessing a danger for users?

As a warm-up for dex-newcomers, this…

and some insights about it

Open blockchain of Bitcoin makes it traceable

The question of anonymity in the Bitcoin network is one that has had a variety of opinions. Many people believe that Bitcoin is anonymous, in the same way, that cash is anonymous as a payment system. The reality, however, is that anonymity on a public network is complicated. There is no part of the Bitcoin protocol that demands users to provide their name, address, country of residence or really any piece of private information — but this doesn’t mean that a user has privacy. Rather, privacy is degraded with the addition of digital “fingerprints” that are immutably stored on the…

On the 14 of February 2019, I had a trip to the largest blockchain hackathon I’ve ever visited — ETHDenver. As you might guess by the name it was in Denver, Colorado. It’s a nice American city which I have never heard before I visited it. It has lots of mountains, big wide streets, and place which called “castle” where hackathon took a place. At the morning on 15 of February, this castle was sieged by programmers of all types, hanger for the fame, recognition, and fun. Despite Denver turned unwelcomely cold these days, the openness and warm spirit of…

And how it actually works.

What is a mining pool?

You have probably heard about bitcoin miners. Some people with powerful computers or a specialized dedicated equipment solve cryptographic puzzles to ensure that Bitcoin is secure. By doing this, miners who are lucky and able to solve puzzles faster than others get rewarded with lots of money. Because many people are competing for this reward, even with expensive computers it takes months or sometimes years to get lucky for an individual participant. To make income more predictable miners are united in the groups which are called mining pools.

How does it work?

Do you ever think about how mining pools work? It sounds very…

I like penguins. Not only because they are super adorable and clumsy on the ground. And not because they are mighty fish hunters and gorgeous swimmers on the ocean. For me, a penguin is a symbol which represents the open-source movement. You might disagree, but I perceive a penguin as a mascot for the openness and collaboration.

On the winter holidays, I decided to visit Chile, a county in South America which has summer instead of winter. The best part of this country that it has penguins (it also was cheaper to flight 14 hours to Chile for a month…


There is no question that most cryptocurrencies are at best ‘experiments’ and at worst Ponzi schemes. But, we must remember that many fiat currencies are not necessarily better. For example, in the last 14 months, a cryptocurrency birthed by a humorous meme, Dogecoin, appears to have outperformed many national currencies by means of its ability to preserve value.

This article will review the relative values of many national currencies from the 20th century up to the present. Emphasis will be placed on currencies that have failed as stores of value for the purpose of commerce.


Gemini USDG is a new centralized stablecoin (similar to Tether) implemented as an ERC20 token on the Ethereum blockchain.

The current implementation gives Gemini the ability to freeze any account or make all tokens non-transferrable. The custodian is able to completely change the implementation of the token every 48 hours.

In this article, we review the code of the smart contract and show how to reproduce the results.

Let’s begin

The code of the smart contract is available at https://etherscan.io/address/0x056fd409e1d7a124bd7017459dfea2f387b6d5cd#code.

This code is uploaded by Gemini but according to etherscan, it’s an exact match with the code compiled and…

Proof of Existence

We could just make a landing page with paper which is white and launch an ICO for blockchillion dollars, but we have a better idea.


Let’s build a blockchain startup in just one weekend. No long talks, no bs, advisors. Just programming, fun and real world impact. Join to participate or just watch us go down in flames. It’s 14–15 July remote + Vancouver, BC. https://t.me/startup_in_one_day


There are very few real-world use-cases of the blockchain. Could you name at least 3? Usage which creates real value, and therefore, have people ready to pay money for it?

I interviewed…

Alex Lebed

Developer and entrepreneur. ex Amazon, Facebook, Genotek. Math degree in logic and algorithms. Stablecoins|privacy|singularity

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