UE : 7 pays du Sud dont la France s'unissent pour promouvoir la blockchain Sept pays membres de l’Union européenne ont signé une déclaration visant à promouvoir l’adoption des technologies émergentes, y compris la blockchain, dans le Sud de l’Europe. La France, l’Espagne, Chypre, la Grèce, Malte, l’Italie et le Portugal s’unissent pour faire du Sud de l’Europe la région la plus avancée du monde en matière de nouvelles technologies telles que l’Intelligence Artificielle (IA), la 5G ou encore la blockchain, rapporte FinancialTimes. “Nous croyons que la blockchain peut renforcer la démocratisation du modèle économique européen. D’après MED7 – le nom donné à cette association – la blockchain offre plus de transparence et pourrait renforcer la protection de la vie privée, notamment en redonnant aux utilisateurs le contrôle sur leur données personnelles. Silvio Schembri, ministre de l’Innovation à Malte, a partagé le moment sur Twitter : @MaltaGov leads 6 other EU Member States to sign a joint declaration on cooperation on #blockchain technology.
The Blockchain Explained to Web Developers, Part 1: The Theory The blockchain is the new hot technology. If you haven’t heard about it, you probably know Bitcoin. Well, the blockchain is the underlying technology that powers Bitcoin. Experts say the blockchain will cause a revolution similar to what Internet provoked. To begin, let’s try to understand what blockchains really are. What Is A Blockchain, Take One Although the blockchain was created to support Bitcoin, the blockchain concept can be defined regardless of the Bitcoin ecosystem. A blockchain is a ledger of facts, replicated across several computers assembled in a peer-to-peer network. I don’t know about you, but after reading these definitions, I still had troubles figuring out what this is all about. Ordering Facts Decentralized peer-to-peer networks aren’t new. P2P networks, like other distributed systems, have to solve a very difficult computer science problem: the resolution of conflicts, or reconciliation. Blocks Mining But nodes don’t just roll a couple dice. Money and Cryptocurrencies
particles-js Building Blockchain in Go. Part 1: Basic Prototype · Going the distance Chinese translations: by liuchengxu, by zhangli1. Introduction Blockchain is one of the most revolutionary technologies of the 21st century, which is still maturing and which potential is not fully realized yet. In this series of articles we’ll build a simplified cryptocurrency that’s based on a simple blockchain implementation. Block Let’s start with the “block” part of “blockchain”. type Block struct { Timestamp int64 Data []byte PrevBlockHash []byte Hash []byte } Timestamp is the current timestamp (when the block is created), Data is the actual valuable information containing in the block, PrevBlockHash stores the hash of the previous block, and Hash is the hash of the block. So how do we calculate the hashes? For now, we’ll just take block fields, concatenate them, and calculate a SHA-256 hash on the concatenated combination. Next, following a Golang convention, we’ll implement a function that’ll simplify the creation of a block: And that’s it for the block! Blockchain That’s it! Output:
Basecamp 3: Manage projects, groups, and client work. What is Blockchain Technology? A Step-by-Step Guide For Beginners What is blockchain technology? What makes it so important? Imagine a world where you can send money directly to someone without a bank – in seconds instead of days, and you don’t pay exorbitant bank fees. Or one where you store money in an online wallet not tied to a bank, meaning you are your own bank and have complete control over your money. You don’t need a bank’s permission to access or move it, and never have to worry about a third party taking it away, or a government’s economic policy manipulating it. This is not a world of the future; it is a world that an avid but growing number of early adopters live in right now. Yet, for many, blockchain technology is still a mysterious or even intimidating topic. 2021 is to blockchain what the late 1990s were to the internet. This post demystifies blockchain technology. You’ll also walk away from this post confident, and well on your way to making informed, independent blockchain technology investment decisions. So let’s dive in 1. 2. 3. 4.
The Blockchain Explained to Web Developers, Part 3: The Truth After exploring the blockchain theory and using it for real, we now have a better understanding of its strengths and weaknesses. Surprisingly, most of our conclusions are very different from what you will read in the blogosphere. Maybe it’s because we don’t blindly relay the fascination caused by the huge valuations of BitCoin and others. Maybe it’s because the hard truth about the blockchain is that it’s not ready yet. Read on to understand our take on the blockchain, based on strong evidence. The Technology Is Not Mature Enough As explained in detail in the previous post in this series, developing Decentralized Apps over a blockchain is a pain. It’s not that the Ethereum developers and community are bad ; they’re amazing, and they’re pouring a lot of time and expertise into their tools. Tip: We haven’t developed DApps for Bitcoin, but I’ve heard it’s worse. The consequence is that developers don’t want to work on blockchain projects - they find it very frustrating. Developer Power
A comprehensive guide to coding a blockchain-powered online community At Hashnode we have been experimenting a lot with blockchain and its use-cases. We have been running a developers’ community ourselves, and the idea behind “decentralized communities” fascinates me a lot. The fact that everyone owns the data and controls the platform can give rise to new types of social apps and disrupt the traditional way of building online communities. Platforms like Steemit have proven that it’s possible to build such communities and reward users for their contributions. To answer the question, I took up the challenge of building a decentralized version of HackerNews. During the process, I evaluated multiple platforms and finally zeroed in on a protocol called Tendermint. The codebase is on GitHub. So what does it take to build a blockchain-powered social community where the user-generated data is decentralized? Preliminary Observations Initially, I thought of utilizing an existing platform to build the app. Why Tendermint Sounds interesting? What’s Needed? And finally,