L13 – Communication of Ethereum Nodes (CBDE Course)

In this lecture we are talking about the way Ethereum nodes communicate with clients. If you are programming a distributed application then you need to get access to the blockchain somehow. Distributed applications usually have two parts: One part is HTML/Javascript. The other part is some smart contract deployed on the blockchain. And there is a standardized way for the communication between the HTML/JS part, so, the website and the…

Set up your development environment for Ethereum on a Linux machine

Set up your development environment for Ethereum on a Linux machine

In this lecture, we are going to set up our development environment for Linux with all the tools that are required to develop smart contracts for Ethereum. We’re not going to describe all of them but focus on those that are widely used by the community. By the way, this lecture is specifically for Linux. If you are running on Windows or MacOS, there are dedicated lectures for that. So…

Ethereum Smart Contract Code Review #1 – Real World CTF 2018

Ethereum Smart Contract Code Review #1 – Real World CTF 2018

When the CTF started we looked at the challenges and I already suspected, just because it’sin-style right now, that there could be an ethereum smart contract challenge.And there was!Acoraida Monica.So I didn’t even look at the rest and just decided to go for it.In the end I didn’t solve the challenge during the two days of CTF, so in this firstvideo I want to tell you about my failed attempts,…

OnTrack – Ethereum Dapp – Part 2 – Smart Contract Testing

Hello, I am Loredana and today I will show you how to set up your local environment fortesting smart contracts, using Mist and Remix.I have recently started building decentralized apps with Ethereum and wanted to share someinsights about the process.To learn more about the OnTrack contract that I will be testing today, check out the Part1 video of the series.We will first set up a private Ethereum node and then…

Set up your development environment for Ethereum on a Windows PC

Set up your development environment for Ethereum on a Windows PC

In this lecture, we are going to set upour development environment for Windows with all the tools that we need todevelop smart contracts for Ethereum. We’re not going to describe all of thembut focus on those that are widely used by the community. By the way, this lectureis specifically for Windows. If you are running on MacOS or Linux there arededicated lessons for that. Our toolbox will be composed of…

Intro To Ethereum Mining: Mine Ether On Your Private Ethereum Blockchain in 8 mins

Intro To Ethereum Mining: Mine Ether On Your Private Ethereum Blockchain in 8 mins

Welcome to the second video in Ethereum Fundamentals.Today’s topic is: Introduction To Mining Ether.Let’s recap what we learned in the previous video.We looked at Geth, the command line interface for Ethereum.We learned how to install the latest version of Geth for Windows.In the lab session, we saw how to set up Geth, and create a private blockchain.Lastly, we created our first Ethereum account.So let’s look at our goals for today.We…

Import Ethereum blockchain transactions to MongoDB, ElasticSearch, Hazelcast with JavaFX/Web3j

Import Ethereum blockchain transactions to MongoDB, ElasticSearch, Hazelcast with JavaFX/Web3j

starting the application with the graphical interfacewaiting for the hazelcast cluster to startsetting up the import parametersdefaults loaded from application.jsonconfigurable target database, block range and db namefirst import into hazelcastfull block range available and imported without delaysecond import into mongoDBand finally an import into ElasticSearch(choppy recording due to high cpu usage)starting an import in the background for new blockschecking out the imported blocks in MongoDBimporting newly mined blocks into ElasticSearchalmost…

Hack de Binance : 7000 bitcoins dérobés #JTduCoin n°78

Hack de Binance : 7000 bitcoins dérobés #JTduCoin n°78

Bonjour à toutes et à tous et sammy et bienvenue dans ce 78e jt du cogne j’espère que tout va pour le mieux chez vous car c’est une chouette semaine qui s’annonce pour cette édition focus sur le hack du géant d exchange bynes ce sont 7000 bitcoin qui ont été dérobés sur la plateforme on parlera de beats finexs qui officialise son ami charles x tones offering est aussi…