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Ethereum Web Development

Ethereum For Web Developers

Ethereum For Web Developers

Techie, Foodie, Traveler, Founder www.zastrin.com I have been learning about Ethereum blockchain platform for some time and the more I learn, the more exciting it looks. There are lots of resources (articles, videos, platform documentation) about Ethereum, its easy to get overwhelmed. But, many of them are outdated understandably because the platform is still evolving at a rapid pace. It took me some time to piece together and get a complete picture of what Ethereum is and how it works. Talking to developers in meetup groups and other online communities, it feels like there are many people who would like to get their hands dirty with this new technology but have the same issue. This article is my attempt at explaining Ethereum from a web developers point of view. If you are a web developer, you know how a webapp with its client server architecture works at a very high level. You have your web application hosted on a hosting provider like AWS, Heroku or a VPS. All the clients interact with this one central application. Clients can be a browser, another api consuming your service etc. When a client makes a request to the server, the server does its magic, talks to the database and/or cache, reads/writes/updates the database and serves the client. This architecture works very well most of the times. However, there are certain applications where it would be really helpful if that database was publicly and securely accessible by everyone and you dont have to rely on this webapp owner for your data. For example, lets look at eBay. If you are a power seller who has earned hundreds of good reviews and for some reason eBay suspends your account. That would be very bad and could severely impact your business. What would be really nice is the ability for you take all your reviews Continue reading >>

Truffle Suite - Your Ethereum Swiss Army Knife

Truffle Suite - Your Ethereum Swiss Army Knife

Truffle is the most popular development framework for Ethereum with a mission to make your life a whole lot easier. Dont know where to start? Get yourself a Truffle Box! Built-in smart contract compilation, linking, deployment and binary management Truffle takes care of managing your contract artifacts so you dont have to. Includes support for custom deployments, library linking and complex Ethereum applications. Automated contract testing for rapid development Bring your dapp development to the 21st century. Write automated tests for your contracts in both JavaScript and Solidity, and get your contracts developed quickly. Scriptable deployment & migrations framework Write simple, manageable deployment scripts that acknowledge your application will change over time. Foster your dapps evolution and ensure you can maintain your contracts far into the future. Network management for deploying to both public & private networks Dont manage network artifacts ever again. Let Truffle do it for you, and put your focus on dapp development where it belongs. Pull in hundreds of smart contract dependencies from NPM and EthPM to have your code stand on the shoulders of giants. Interactive console for direct contract communication Use Truffle to save time and talk to your contracts via an interactive console, which includes access to all your built contracts and all available Truffle commands. External script runner that executes scripts within a Truffle environment Use Truffle to bootstrap your contracts and run a network-aware script, without hassle. Whether youre compiling contracts or running unit tests, Truffle includes clever optimizations to ensure you only compile what you have to and your tests run as quickly as possible. When used along with Ganache , you can develop your da Continue reading >>

A Guide To Developing An Ethereum Decentralized Voting Application

A Guide To Developing An Ethereum Decentralized Voting Application

A guide to developing an Ethereum decentralized voting application After the entire cryptocurrency market passed 700 billion dollars in market cap, the cryptocurrency space exploded over these last couple months. But this is just the beginning. As blockchain systems continue to evolve and scale, one great way to dip into this new space and leverage this technology is with decentralized applications, otherwise known as dApps. CryptoKitties , famous for its congestion of the Ethereum Blockchain, is a great example of a dApp, uniquely combining concepts of breedable and collectible cats with the blockchain. This sensational game is just one creative example out of a virtually unlimited number of opportunities. Although seemingly very complicated, certain frameworks and tools have been developed to abstract your interactions with the blockchain and smart contracts. In this blog post, I will go over one way to create a decentralized voting app on Ethereum. I will briefly go over Ethereum, but you probably should have an understanding of it to use this guide to the fullest. In addition, I do expect you to know Javascript. Essentially, a great decentralized application utilizing blockchain technology allows you perform the same actions you would today (like transferring money) without a trusted third party. The best dApps have a specific real world use-case that leverages the unique characteristics of blockchain. In essence, the blockchain is a shared, programmable, cryptographically secure and therefore trusted ledger which no single user controls and which can be inspected by anyone.- KlausSchwab Even though a voting app might not be a great app for consumers, Ive chosen to use it for this guide because the main issues blockchain solves transparency, security, accessibility Continue reading >>

Would You Rather Learn Web Development Or Smart Contract Development On Ethereum?

Would You Rather Learn Web Development Or Smart Contract Development On Ethereum?

I dont think this should be an either/or type of a answer. Web development obviously has a far far greater demand than smart contract development on Ethereum. In fact, ethereum smart contract development is just one small aspect of blockchain development. So ideally the comparision should be between web development and blockchain development really :) Anyways, the reason I say that this is not an either/or is because a lot of things are common to web development and ethereum development. The first being the programming language. Web3js is the most popular library for interacting with smart contracts in ethereum and it is built on Javascript (which by far is the most popular web development programming language). Also, ethereum smart contract development should not be looked in isolation. It eventually needs some sort of a web interface to interact with, and that is mostly programmed in Nodejs ( Node.js ) which is again a very popular technology in web development. The only thing different in Ethereum smart contract development is to learn the underlying principles of blockchain and to master the solidity programming language . Here is one tutorial that any web developer can follow to quickly get up and running developing their first smart contract on Ethereum. Continue reading >>

Ethereum Programming For Web Developers: Atutorial

Ethereum Programming For Web Developers: Atutorial

Ethereum programming for web developers: atutorial by Jon Evans, CTO, HappyFunCorp ([email protected]) Hello, fellow web developer! If youre reading this, youre probably interested in blockchains, smart contracts, etc., as someone who actually wants to write some smart-contract code. Im going to walk you through setting up, writing, and deploying a smart contract to a real live Ethereum blockchain, and then interacting with that contract in a browser via a web service. Im not going to explain Blockchains 101 or Ethereum 101: there are many other places to go for that. But its probably worth discussing Ethereum at a very high level from a developers perspective. You dont need to care about mining or Proof-of-Work vs. Proof-of-Stake, or anything like that. But you should know that Ethereum is a decentralized virtual machine that runs on many nodes scattered around the world, and so-called smart contracts are code which runs (along with data which is stored) within that virtual machine, i.e. on every single node. This is obviously hugely inefficient, but it has advantages; everyone in the world can rely on this code/data, because no central service or system can tamper with it; and anyone can submit code/data to this machine without the registering or asking permission. They do, however, need to pay. Every line of code and byte of storage in Ethereum has a price. Ethereum, like Bitcoin, has a native currency, called ether; this is the same Ether currency that is traded on exchanges like Coinbase. When used to pay for Ethereum computing/storage, it is called gas. For any given smart contract, gas has a limit and a price. This is pretty confusing at first, but dont worry, youll wrap your head around it eventually, and anyway this tutorial uses free fake money on a so-cal Continue reading >>

The Authoritative Guide To Blockchain Development

The Authoritative Guide To Blockchain Development

Entrepreneur. @Airbnb, @earndotcom alum. Instructor @Outco. Writer. Effective Altruist. Blockchainist. Former poker pro. The authoritative guide to blockchain development Cryptocurrencies, ICOs, magic internet money its all so damn exciting, and you, the eager developer, want to get in on the madness. Where do you start? Im glad youre excited about this space. I am too. But youll probably find its unclear where to begin. Blockchain is moving at breakneck speed, but theres no clear onramp to learning this stuff. Since I left Airbnb to work full-time on blockchain, many people have reached out to me asking how to get into the blockchain space full-time. Consider this my authoritative (and inevitably incomplete) guide on how to get into blockchain engineering. Why should you learn blockchain development? Why should you learn blockchain development? Before I answer that question, let me first note: blockchain is a massively overvalued space right now. These prices are unsustainable, and a crash is definitely coming. This has all happened before, and will probably happen again. But if you work long-term in this space, youll learn to shrug off prices. In the words of Emin Gun Sirer prices are the least interesting part of cryptocurrencies. These are massively important technologies, and they are going to irrevocably change the world. If youre unsure, I cant tell you whether or not you should jump in. But I can tell you five reasons that convinced me to take the leap: Bitcoin was invented 10 years ago, but the rate of innovation has only reached a fever pitch in the last couple of years, especially with the launch of Ethereum in 2015. Most of the new companies and ideas in this space have been built on top of Ethereum, which is still very immature. Even if you start now, you Continue reading >>

Ethereum Web Development

Ethereum Web Development

What is Ethereum? Looking to get started with Ethereum Web Development?Ethereum is a blockchain based platform that runs smart contracts. The heart of it is based on the successful technology Bitcoin Blockchain, Ethereum runs decentralized smart contracts that function as decentralized applications that are programmed into the blockchain itself. Amongweb developers,it is rapidly being considered [] Looking to get started with Ethereum Web Development? Ethereum is a blockchain based platform that runs smart contracts. The heart of it is based on the successful technology Bitcoin Blockchain, Ethereum runs decentralized smart contracts that function as decentralized applications that are programmed into the blockchain itself. Amongweb developers,it is rapidly being considered asWeb 3.0. Ethereum allows developers to use current styling tools and technology mixed with the power of the Ethereum Computer to create unstoppable applications that cannot be interfered with. The project started in August 2014, with a pre-sale to jumpstart the coin. Over the last two years, Ethereum has gained a sizable amount of users and adopters looking to explore what the currency has to offer. Most web developers are quite familiar with web applications and how the client/server architecture model operates, at least at a high level. Right now, web applications are housed at hosting providers like Azure, Amazon Web Services, Google App Engine, or a VPS/server combo. In this model, all of a companys clients interact with one centralized application system. This allows clients to interact and utilize services from a variety of devices. When clients make a request to a service, the server does all the magicsuch as accessing the database, caching systems, and returning data to the client. This cur Continue reading >>

Zastrin | Learn Ethereum Programming By Doing Real-world Projects

Zastrin | Learn Ethereum Programming By Doing Real-world Projects

We are excited to introduce our new Referral program! If you liked our courses, please share this coupon code with your friends. For every friend who buys a course using your code, they receive 25% off and you will be credited 25% of the course price in to your account that you can use for future purchases. Zastrin teaches you Ethereum blockchain programming through real-world projects. Our courses will help you learn the core concepts and introduces you to the key libraries and frameworks required to build production quality dapps. Our step-by-step guides help you build projects from the ground up. Overview of a generic blockchain, concepts and workings of the Ethereum blockchain and languages and frameworks required to build decentralized applications. Decentralized application development is unlike web/mobile development. There are many moving parts and you have to carefully consider various issues such as security, time/space complexity and so on. Our courses help you think and architect successful decentralized applications. Truffle is a dapp development framework that is used to make application development easy. It abstracts away many complexities of the Ethereum blockchain development and helps accelerate development. Our Dapps will be built using the Solidity programming language using the Truffle framework. The goal of these courses is to help you understand the concepts of the Ethereum blockchain and build real-world decentralized applications. By the end of this series of courses, you'll be able to build your own decentralized applications. This is a beginner course ideal for any one with very basic or no knowledge of the Ethereum blockchain. In this course, you will build a simple Decentralized Voting application. In this course, you will build a Dapp whic Continue reading >>

A Gentle Introduction To Ethereum Programming, Part1

A Gentle Introduction To Ethereum Programming, Part1

Developer, security researcher, musician & chef at Zeppelin A Gentle Introduction to Ethereum Programming, Part1 Two months ago I was asked to build an Ethereum web application as a work test to join Zeppelin , but I didnt have any idea about blockchain technology at all. I had barely heard of Bitcoin, so there was no other option but to dive in. This will be a series of posts aimed at software developers who want to ramp up to Ethereum. Please keep in mind that I do not consider myself an expert in this subject, Id just like to teach you what I learned and save you some time if you are in the same place I was. By the end of the series you should be able to build a fully-fledged smart-contract-enabled web application (also known as DApp) on your own! Enjoy, and please do not hesitate to reach out with questions, suggestions or feedback. 3. Frameworks & Tools in the real world coming soon 4. A real DApp, a token marketplace coming soon Ill assume you have some basic knowledge about computer programming and what a blockchain data structure looks like. If you dont, please follow this link and come back! Lets start by defining Ethereum, or at least, what I understood about it after my research. Ethereum is an open-source public platform, distributed and based on blockchain technology, to run applications without censorship or third-party interference. Smart contracts are just computer programs. We build Ethereum applications based on smart contracts. Bear in mind that even though this concept comes up with Ethereum these days, it was actually proposed by Nick Szabo in 1996:) The EVM is the sandboxed runtime and completely isolated environment for smart contracts in Ethereum. This means every smart contract running inside the EVM has no access to network, file system or oth Continue reading >>

Ethereum Project

Ethereum Project

You are responsible for your own computer security. If your machine is compromised you will lose your ether, access to any contracts and possibly more. You are responsible for your own actions. If you mess something up or break any laws while using this software, it's your fault, and your fault only. You are responsible for your own karma. Don't be a jerk and respect the rights of others. What goes around comes around. The user expressly knows and agrees that the user is using the Ethereum platform at the users sole risk. The user acknowledges that the user has an adequate understanding of the risks, usage and intricacies of cryptographic tokens and blockchain-based open source software, eth platform and ethereum The user acknowledges and agrees that, to the fullest extent permitted by any applicable law, the disclaimers of liability contained herein apply to any and all damages or injury whatsoever caused by or related to risks of, use of, or inability to use, ethereum or the Ethereum platform under any cause or action whatsoever of any kind in any jurisdiction, including, without limitation, actions for breach of warranty, breach of contract or tort (including negligence) and that neither Stiftung Ethereum (i.e. Ethereum Foundation) nor Ethereum team shall be liable for any indirect, incidental, special, exemplary or consequential damages, including for loss of profits, goodwill or data that occurs as a result. Some jurisdictions do not allow the exclusion of certain warranties or the limitation or exclusion of liability for certain types of damages. Therefore, some of the above limitations in this section may not apply to a user. In particular, nothing in these terms shall affect the statutory rights of any user or exclude injury arising from any willful misconduct Continue reading >>

A Modest Primer For Ethereum Programming

A Modest Primer For Ethereum Programming

Im a long-term cryptocurrency believer, pretty saddened to see the space degenerate into something about as interesting and brimming with emergent properties as an unregulated penny-stock market. But there are still some genuinely interesting, technically innovative blockchain projects out there, if you look for them: Blockstack, Foam, Mattereum, etc. And at my day job at HappyFunCorp weve been working on a few ourselves, both internally and for a couple of clients (who are still in stealth mode.) Meanwhile the world is full of web programmers, but theres a real paucity of cryptocurrency developers, and the chasm between the two fields is hard to cross. So I thought Id take what Id learned from architecting and building out our own Ethereum-based projects, and turn it into an open-sourced tutorial for web devs, in the hopes of encouraging a little more actual development and evolution as opposed to blind speculation. Its great that so much money is coming into the space but it wont help unless people actually use it to plant some seeds of innovation, and we hope that this will in some small way help make that happen. [protected-iframe id=3032f1740fb174e26842077c48f45454-24588526-59254947 info=width=100% height=600 frameborder=0 class=scribd_iframe_embed scrolling=no] Continue reading >>

Web Developer, Welcome Toethereum

Web Developer, Welcome Toethereum

The complete on-boarding guide to Ethereum for web developers So you heard about Blockchain technology and the Ethereum project and thought its novel and interesting. Until today you have dealt with many web related tasks and processes, such as client and server communication, Ajax requests, web sockets, DB tables indexing, user authentication and more. Today you are about to enter a new playground, where most of the players work totally different. Welcome to the decentralized computing world, where there is no single server for your app, HTTP is not the main protocol and SQL injection is just gibberish. Traditional full stack developers can have quite a cumbersome process of adjusting their mind-set to decentralized computing. Everything is different protocols, applications, developer tools, security and performance concerns. We at Wemark , a bunch of experienced web developers, have gone through this process over the last few months. We have decided to share our knowledge with the community, mainly web developers, spoken in their language. Its not going to teach you all about Ethereum, but to give you a kickstart for your learning process and to understand whos against who in this ecosystem. I grouped the knowledge into a few learning steps: intro, terms, tools, main stakeholders and code examples. Ethereum Foundation logo ( ethereum.org ) First, youll have to understand the underlying technology of Ethereum which is the blockchain. The first famous use of the blockchain was the Bitcoin, which you already know. Youd better have a solid understanding of how it works what it enables and how. In this video , youll get a live and working demonstration of how blockchain works. Make sure you fully understand it. Watch Ethereum in 25 Minutes , a presentation by Vitalik Bute Continue reading >>

Ethereum Programming For Web Developers | Hacker News

Ethereum Programming For Web Developers | Hacker News

I've been dabbling recently, and as I've said before I'm quite put off by the limitations of Ethereum. As it stands now, it's main use case appears to be the development of new cryptocoins, perhaps voting applications..? And yet, every now and then you come across a nugget of true insight when working with the Ethereum protocol, for instance the gas payments to nodes to run code effectively should stop DDoS attacks since it would require vast sums of money to disrupt the network. It remains to be seen how valid this idea is in practice, but you could look at ideas like that and say, "Yeah, that seems like a step forward." Anyways, if Ethereum really will become Web 3.0, then comparatively speaking I'd say we're not even in the 56k modem era yet. While I would love for this to be a thing, most cryptocurrency enthusiasts seem to distrust anything and everyone. How would one develop an oracle trusted enough that it would be accurate while not being vulnerable to sudden betrayals? There are for example plenty of stories from Eve Online (closest example of a lawless/trustless universe) where a very trusted middleman suddenly changed behavior when the benefits became great enough. Especially when a cryptocoin includes strong anonymity, betrayal has very low downside since no retribution would be possible. However even if such anonymity is not present, it may not be possible to get retribution if the entity on the other side is (for example) the mafia. i thought the whole point of this blockchain stuff was that there was no trust in any one entity/group of entities (aside from the chain itself) as soon as you have "blockchain plus a few trusted people", does that not completely undermine the whole idea? A blockchain can only process its own data, no external api call allowed. Continue reading >>

Ethereum Development Tutorial

Ethereum Development Tutorial

The purpose of this page is to serve as an introduction to the basics of Ethereum that you will need to understand from a development standpoint, in order to produce contracts and decentralized applications. For a general introduction to Ethereum, see the white paper , and for a full technical spec see the yellow papers, although those are not prerequisites for this page; that is to say, this page is meant as an alternative introduction to Ethereum specifically targeted towards application developers. Ethereum is a platform that is intended to allow people to easily write decentralized applications (apps) using blockchain technology. A decentralized application is an application which serves some specific purpose to its users, but which has the important property that the application itself does not depend on any specific party existing. Rather than serving as a front-end for selling or providing a specific party's services, a app is a tool for people and organizations on different sides of an interaction used to come together without any centralized intermediary. Even necessary "intermediary" functions that are typically the domain of centralized providers, such as filtering, identity management, escrow and dispute resolution, are either handled directly by the network or left open for anyone to participate, using tools like internal token systems and reputation systems to ensure that users get access to high-quality services. Early examples of apps include BitTorrent for file sharing and Bitcoin for currency. Ethereum takes the primary developments used by BitTorrent and Bitcoin, the peer to peer network and the blockchain, and generalizes them in order to allow developers to use these technologies for any purpose. The Ethereum blockchain can be alternately described Continue reading >>

Build Your First Ethereum Smart Contract With Soliditytutorial

Build Your First Ethereum Smart Contract With Soliditytutorial

Finance & Tech Nerd, Investor, Blockchain & Crypto Enthusiast, Wannabe Polymath, Master of Discipline in Training, Laissez Faire. Talk Is Cheap. Build Your First Ethereum Smart Contract with Solidity Tutorial So you wanna build a smart contract? Perhaps you want to understand how they work, maybe you want to build your own Dapp, maybe you want to launch the very first billion dollar ICO (sarcasm)... Regardless of your intentions, learning how smart contracts work is invaluable. The Ethereum platform possesses enormous potential to create Dapps that could change the way we interact on the web in the decades to come. While Ethereum deploys smart contracts that work much like a standard blockchain transaction, they yield a conditional statement that must be met before a function(s) is executed. Smart contracts can be used for voting, crowdfunding, blind auctions, multi-signature wallets and MUCH more. Bob has his own scrap metal depot business in the United States, Eric is his iron scrap supplier. Eric is based out of China. Bob and Eric have a GREAT business relationship. They trust each other and have been doing business for a long time. Both have booming businesses, and Bob in particular sells out of iron scrap on a routine basis. Bob deploys a contract where once his iron scrap inventory reaches a certain range, he automatically sends an order out to Eric for X lbs of iron scrap at Y ether per ton. Eric agrees to the arrangement and accepts Bobs payment in ether right away. Eric gets to work right away and starts fulfilling Bobs order. Eric can exchange his ether at a local exchange online for Yuan for a tiny fee and itll be processed instantaneously. Whether Eric decides to hold ether or convert to Yuan is his choice, but either way he can now put this capital to wor Continue reading >>

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