How I lost 1 year of life doing failed crypto startup

The recent news about 1400 bitcoins loss caused a lot of buzz: the amount of Bitcoins worth about 16.3 million $, not any kind of exchange hack, all happened using Electrum wallet - one of the oldest and still very popular Bitcoin wallet.
I share the lessons which could be learned from that story.

With the new release of Hyperledger Fabric 2.0 the lifecycle of chaincode has been changed. It implies also the changes in the chaincode deployment process - what basically means that commands used to deploy chaincode in < 2.0 release (no matter if using peer binary or SDK) will not work. In this article I show how to deploy chaincode to the Hyperledger Fabric 2.0.

Truffle Suite is the tool pack dedicated to Ethereum developers (focusing on smart contracts). That very actively developed project is currently one of the most popular frameworks for implementing, testing and running Ethereum based decentralized applications.

In this article:

I will describe the Truffle Suite tools;
I will describe and use the main tool of the suite - Truffle (name of the tool is the same as suite name);
I will initialize example project Pet Shop - implementing first features and corresponding tests;

zk-SNARK (Zero-Knowledge Succinct Non-Interactive Argument of Knowledge) is the protocol of zero knowledge proof. ZCash cryptocurrency will be the one of first opened blockchain projects, which will utilize the implementation of this fascinating algorithm in the mechanics of blockchain. Zero knowledge proofs have huge potential and can be used or even revolutionize a lot of data exchange processes.

In this article I explain:

what is the zero knowledge proof;
what is, how works and what kind of math mechanics are hidden behind zk-SNARK.

Public blockchains can be used by everyone. Private blockchains can be used by selected group of participants. This is the most basic and overall difference between public and private blockchains. What is the real difference based on?

What are the concrete differences between public and private blockchains?
Who can be the user of public and private blockchain?

I invite you to read the article.

Lisk is dedicated to develop custom blockchain based applications using Javascript. After Alpha SDK release it's possible for developers to prototype first custom applications. Technology is awaited by project investors since some time already. In that article I would like to go through the process of installing Lisk and all dependent technologies and then create and run own Lisk blockchain application.

How looks like the Lisk Alpha SDK application development process?
How looks like the code of custom blockchain?
What are the possibilities and potential of Lisk technology?

I would like to present software engineer point of view and describe both the positive and negative aspects.