Cancel or Update Pending Ethereum Transactions In this video I'll show you how you can "unstuck" your pending Transactions on Ethereum. Did you know? You can update Ethereum transactions or cancel Transactions altogether. You can do it from MetaMask
ethereum Smart Contract Upgrades and Proxy Patterns In this video you will learn about all available methods to upgrade Smart Contracts. We are gradually going from logic/storage separation over Proxy patterns to most sophisticated techniques to exchange Smart Contracts
tutorial Uniswap v2 (as a Developer) IntroductionUniswap is a platform (or protocol) on Ethereum to swap either Tokens<->Ether (V1) or Tokens<->Tokens (V2). But how does Uniswap work as an integration to
ethereum Dashboards for Ethereum Monitoring So you built your decentralized Application. But then? Of course, you need to monitor it. Because always manage the money at risk and that includes proper monitoring. There are a few resources out
solidity Solidity 0.6.4 and call{value: ...}() instead of call.value()() Solidity 0.6.4 deprecated something which almost slipped my attention. address.call.value()() was deprecated and got replaced with address.call{value: x}(). Let's check out how this works. When I saw
Hosting Containers with AWS ECS at Scale In mid 2019 I started to look for Enterprise-grade hosting solutions. Why? Because we already work with Docker and Git in our teams. So, the next step was to see if we can
solidity Solidity 0.6.0 Breaking Changes Hands-On Video Walk-Through So, you heard the news: Solidity 0.6.0 is out. And it got some breaking changes! In this post & attached video I want to go through some of the changes hands-on.
expat ThinkPad T495s - Developers Review Today a post from my life instead of Blockchains. I bought a new Laptop. I was thinking about it for quite a while and the timing seemed just right, as my old one
ethereum Ethereum Blockchain Quiz - 5 Questions You Should Know (Hard!) Do you really know Ethereum well? Today I got 5 questions every Ethereum Blockchain Developer should know. Some are super easy, some are quite hard, none of them should feel unfamiliar. Watch the
programming Local Development vs. Virtual Box and Vagrant vs. Container like Docker or Kubernetes In this post I am comparing three things: 1. local (web) development, 2. classical virtualization using Hypervisors such as Virtual Box, 3. containerization and orchestration tools such as LXC, Docker, docker-compose, docker-swarm and
blockchain 4 Things about Enterprise Blockchain Development. Get ready (for 2020)! Today I want to talk about 4 things you didn't know about Blockchains, Hyperledger, Ethereum and general Smart Contract Development. In this video I will show you how to setup Hyperledger Besu on
blockchain Is it worth becoming Blockchain Developer in 2020? Is developer demand raising or falling? What's the cost of Blockchain education? What's the average salary for a Blockchain developer? How long will it take to become a successful Blockchain Developer? ... and many more! Let's get into it.
course Learn Docker and Docker-Compose 100% Hands-On Beginning of 2019 I got frustrated. I used Vagrant and the ScotchBox for Web-Development. But it was hard to switch to new PHP or MySQL versions. It was hard to get the whole
Why a .send() transaction can fail We already covered the difference between .send() and .transfer() in another blog post. But now, someone in our Udemy courses asked the great question: "How can a .send() transaction fail"? Send
Ethereum Accounts, Addresses, Private and Public Keys In this post I'm going to tell you what exactly an account on the Ethereum Blockchain is. We are also talking about how an address is really created internally. And what the private
What is ... ? Ethereum Frequent Terms and Concepts explained! What's an ABI Array? What's the Account Nonce? What's the difference between Ether and Ethereum? This and many more questions explained!
blockchain What's the difference between JavaScript, Solidity, Ethereum and Chaincode? This is a question someone asked recently. And right so! To the seasoned eye it looks like a mix of different technologies just randomly mixed together. For beginners it's extremely hard to keep
How To Return A Mapping In Solidity and Web3? Someone in our Facebook Group asked how to return a Mapping in Solidity. It's not possible. But can you eventually return a struct with a mapping? Would that work? I will give you
blockchain Blockchain & Education Blockchain Technology and the Education System Education is one of the key areas of focus in most developed countries as advancement in other sector hinges on the level of education. Regardless of the
blockchain Facebook and the Crypto-World So, Facebooks Crypto-Ads are back. You've probably heard it. And Bitcoin made a jump as well, which hopefull didn't surprise anyone. I've long said that Mark is building his own Blockchain Empire. Facebook
blockchain Why Blockchain Is Insurance Disruption A few days ago I asked how blockchain technology can help reduce the cost for insurance settlment and other overhead costs. How much are the settlement costs? The answer, how blockchain disrupts the
The Proof that Censorship-Free is WISHFUL Thinking and NOTHING else! It took 11 posts until he wanted to delete something.. New Record! Lucky for him, it was so early. His new dApp was just released on the Rinkeby-Testnet. A simple Discussion-Board. A Sample-dApp,
bitcoin Amazon Accepts CRYPTO Payments via Moon Isn't that amazing? You can take your crypto and spend it on real-world items. You can go on a shopping spree on Amazon. I did. I tried and failed. It's actually pretty straight
ethereum Vitalik reports PERSONALLY to Elon on Twitter Have you seen what happened between Elon Musk and Vitalik Buterin on Twitter yesterday? Elon, the founder and CEO of Tesla - probably everyone knows him by now - had Vitalik Buterin, the
Enterprise Ethereum - 4 Myths debunked Ethereum is often coined unsuitable for banks and financial insitutions because of the lack of privacy. "Banks will never go public with their data, it's simply not possible, regulatory issues, can't do&
