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Web3.JS: Ethereum JavaScript API
 
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Web3.js is the official Ethereum Javascript API. You use it to interact with your Ethereum smart contracts. Watch this talk about the new developments in Web3.js EVENT: devcon three 2017 SPEAKER: Fabian Vogelsteller PERMISSIONS: The original video was published with the Creative Commons Attribution license (reuse allowed). CREDITS: Original video source: https://www.youtube.com/watch?v=92pdrRH_VGA
Views: 8403 Coding Tech
03. Web3.js Tutorial - Attach a GUI to your Ethereum Smart Contract
 
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Free Course Page (In development): https://goo.gl/EiKpPP Written tutorial of this video: https://goo.gl/RdXuz9 https://coursetro.com This video is the 3rd lesson from my 100% free course: "Developing Ethereum Smart Contracts for Beginners" Check it out here: https://goo.gl/EiKpPP In this video, we're going to take our smart contract we created in the previous lesson, and make it accessible via a web page with the help of the official Ethereum Web3.js client and Ethereum-testrpc. https://coursetro.com https://www.facebook.com/coursetro/ - - - - - - - - - - - - - - - - - - - - - - Subscribe for NEW VIDEOS weekly! My Patreon: https://www.patreon.com/designcourse My site: https://coursetro.com My personal FB account: http://fb.com/logodesigner Coursetro FB: http://fb.com/coursetro Coursetro's Twitter: http://twitter.com/designcoursecom Join my Discord! https://discord.gg/a27CKAF ^-Chat with me and others - - - - - - - - - - - - - - - - - - - - - - Who is Gary Simon? Well, I'm a full stack developer with 2+ decades experience and I teach people how to design and code. I've created around 100+ courses for big brands like LinkedIn, Lynda.com, Pluralsight and Envato Network. Now, I focus all of my time and energy on this channel and my website Coursetro.com. Come to my discord server or add me on social media and say Hi!
Views: 53625 DesignCourse
Web3.js Intro · Web3.js · #1 Ethereum Blockchain Developer Crash Course
 
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► SUBSCRIBE TO THIS CHANNEL ◄ For more videos on how to build decentralized applications on The Ethereum Blockchain: https://www.youtube.com/channel/UCY0xL8V6NzzFcwzHCgB8orQ?sub_confirmation=1 DOWNLOAD FREE VIDEO COURSES: http://www.dappuniversity.com/free-download How to Build Ethereum Dapp (Decentralized Application Development Tutorial) https://youtu.be/3681ZYbDSSk Donate Ether to the channel: 0x39C7BC5496f4eaaa1fF75d88E079C22f0519E7b9 Website: http://dappuniversity.com/ Follow me on Twitter (@DappUniversity): https://twitter.com/DappUniversity Email me: gregory@dappuniversity.com
Views: 5946 Dapp University
Frontend Web Applications On Ethereum 1 - TestRPC and Web3.js | Blockchain
 
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Ethereum allows you to create powerful smart contracts on the blockchain. The true power of Ethereum though, is the ability to create complex, decentralized applications or DApps. A great DApp ties smart contracts with an intunitive user-interface that allows the average user to leverage the power of the Ethereum network. In this video we begin to explore how to implement a web frontend that talks to our smart contracts deployed on the blockchain. Remix - Solidity IDE - https://remix.ethereum.org Solidity Documentation - https://solidity.readthedocs.io/en/develop/ ERC20 Standard - https://github.com/ethereum/eips/issues/20 EthereumJS TestRPC - https://github.com/ethereumjs/testrpc Web3JS - http://web3js.readthedocs.io/en/1.0/ Check out my other videos and articles http://edzynda.com Follow me on Steemit https://steemit.com/@edzynda 💎►Donate Ether and Ethereum-Based (ERC-20) Tokens 0x146cfed833cc926b16b0da9257e8a281c2add9f3 💎►Donate Bitcoin 1KyZbSeeCWgmeRrUQTTbb3meJEyPCGy3zd 💎►Donate Dash XoZdSzN3hPFksQQZx616A6fGGN22zANpMW 💎►Donate Lisk 16883042352161362207L 💎►Donate IOTA SRZWULMJI9WJFVWDIVXXMVWHVVJAKMAXKMFOINQGEZXNJYLRSHPXBE9PHQDUVIRESEUZSYJBGGKLBMEYIJOKIOIXBU
Views: 20662 What The Func?
web3.js library, the Ethereum JavaScript API
 
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This video explains what the purpose is of the web3.js library and how to use it. The web3.js library is also known as the Ethereum JavaScript API. To communicate with an Ethereum node or transact with a smart contract deployed on the blockchain from inside a JavaScript or web application you can use the web3.js library. Under the hood the web3.js library communicates with an Ethereum node through JSON RPC calls. The Ethereum node must expose its a RPC layer. The MetaMask extension exposes the web3 API by an injected web3 object which you can access via JavaScript. The MetaMask extension does not support most synchronous web3 API methods. Make your method calls asynchronous! To use the web3.js library in your web application: - Download the web3.js library from: https://github.com/ethereum/web3.js - In the dist folder you will find the files web3-light.min.js and web3.min.js - The file web3.min.js contains the Bignumber module and the file web3-light.min.js does not. If you do not know which one to choose, then use file web3.min.js. Web3.js API code examples can be found at: http://www.mobilefish.com/download/ethereum/web3api.html In the examples asynchronous methods were used if they are available. The demonstration Ethereum Dapp is made for educational purpose. The web interface can be found at: http://www.mobilefish.com/download/ethereum/DemoDapp.html The associated Solidity contract can be found at: http://www.mobilefish.com/download/ethereum/DemoContract.sol.txt The main purpose of this Dapp is to learn how to use web3.js api (v0.x.x) and how interact with a deployed smart contract. To setup the demonstration Ethereum Dapp (DemoApp.html): - Download and deploy the DemoContract.sol smart contract on any test network (testrpc, ropsten, rinkeby, or your own private ethereum node, etc). Save the contract address you will need it later. - Download and install the DemoApp.html on your web server. - Download and install the web3.min.js (v0.19.0) on your web server. - Modify the path to web3.min.js in the DemoApp.html file. - Modify the contract address in the DemoApp.html file. How to use the demonstration Ethereum Dapp (DemoApp.html): - Use a test network. - Have a test account with enough ethers to experiment with. - The demonstration Dapp (DemoApp.html) also works well with MetaMask. Notes: Two versions of DemoApp.html has been created. - A version using callbacks which is not very readable because of using callback trees! For educational purpose you can find this version at (but do not use it!): http://www.mobilefish.com/download/ethereum/DemoDappv0.1.html - The original code has been refactored by using JavaScript Promises. http://www.mobilefish.com/download/ethereum/DemoDapp.html - The DemoApp.html uses only vanilla JavaScript an uses the web3.js library. All code meaning: JavaScript, HTML and CSS can be found in this single web page. Warnings: - The DemoApp.html does not work with the web3.js v1.0.0. - The web3.js library v1.0.0 has many changes. The DemoApp.html will soon be obsolete. - Use the Demonstration Ethereum Dapp on a test environment. Check out all my other Ethereum related tutorial videos: https://goo.gl/eNJVXe Subscribe to my YouTube channel: https://goo.gl/61NFzK The presentation used in this video tutorial can be found at: http://www.mobilefish.com/developer/blockchain/blockchain_quickguide_ethereum_related_tutorials.html The DemoContract.sol used in the video: http://www.mobilefish.com/download/ethereum/DemoContract.sol.txt To interact with the DemoContract.sol use the demonstration Ethereum Dapp (using Javascript Promises): http://www.mobilefish.com/download/ethereum/DemoDapp.html An older version of the demonstration Ethereum Dapp (do not use this): http://www.mobilefish.com/download/ethereum/DemoDappv0.1.html More information about RPC layer can be found at: https://youtu.be/oOfDzXBXoOg The web3.js library can be found at: https://github.com/ethereum/web3.js The web3.js API v0.x.x can be found at: https://github.com/ethereum/wiki/wiki/JavaScript-API The web3.js API v1.0 can be found at: http://web3js.readthedocs.io/en/1.0/ MetaMask web3 API can be found at: https://github.com/MetaMask/faq/blob/master/DEVELOPERS.md #mobilefish #howto #ethereum
Views: 13536 Mobilefish.com
Using web3.js to interact with a deployed Ethereum smart contract
 
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Brian walks you through writing your first lines of web3 JavaScript code in order to interact with the Ethereum smart contract we deployed to the blockchain in the previous video. web3 JS documentation: https://github.com/ethereum/web3.js/ For professional inquiries, contact http://web3devs.com/
Создание web-приложения для взаимодействия с блокчейном Ethereum на платформе Meteor
 
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Курсы по разработке на Ethereum: http://ethereumworks.com/?ch=yts&utm_source=yts&utm_medium=youtubesl&utm_campaign=youtubesl&utm_term=youtubesl. Telegram чат для разработчиков: https://t.me/smart_contracts_dev; Самые свежие новости и статьи по криптокодингу - https://t.me/cryptocoding_news Предыдущее видео (создание и запуск первого умного контракта в сети Ethereum) - https://www.youtube.com/edit?o=U&video_id=Afr_PakSW5g Проект Meteor - https://www.meteor.com/ API пакета Web3 JavaScript - https://github.com/ethereum/wiki/wiki/JavaScript-API Sublime Text - https://www.sublimetext.com/ BAT файл для запуска Geth - https://drive.google.com/open?id=0B3_WGJKO-9L7X3hUbTFqZWFHWEk Cвязаться со мной можно через Skype - v.poskonin (Mouse Po). Канал можно поддержать отправив донат на биткоин-кошелек: 17Zs1nhgBB92CeCxFbbB7WhT9MdypJAj1d, или кошелек Ethereum: 0x9740Cd40296744a0aE2aFD115933a791Da4c2AD8.
Web3.js 1.0
 
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Speaker: Fabian Vogelsteller
Views: 4481 Ethereum Foundation
Ethereum Programming for Noobs - Web 3.0
 
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Today we are going to do some web development using Ethereum web3 Javascript library and build a simple webpage that interacts with the Ethereum blockchain. YOU DO NOT TO BE A PROGRAMMER to follow this video. Hope you enjoy guys! VISUAL STUDIO CODE: https://code.visualstudio.com/ NODEJS: https://nodejs.org/en/download/ METAMASK: https://metamask.io/#how-it-works WEB3: https://github.com/ethereum/web3.js/tree/1.0 NODEJS SERVE PACKAGE https://www.npmjs.com/package/serve Thanks for watching guys 💝 🎓 Join my online academy https://academy.ivanontech.com 🎓 Interested in Smart Contract Programming? Sign up here: https://eepurl.com/dkHOT9 📣 Join Telegram channel https://t.me/joinchat/AAAAAE2xJE4l8xhC8MU4cg 🎤 If you would like me to speak at your conference, book me here: https://ivanontech.com 🍻 Join the crypto discussion forum - https://thecrypto.pub 📚 Get my free e-book on Bitcoin and Blockchain - http://eepurl.com/c0hyc9 you will receive the book in your inbox once you sign up 👫👭👬Social: LinkedIn: http://linkedin.com/in/ivanliljeqvist/ Instagram: http://instagram.com/ivanontech/ Steemit: https://steemit.com/@ivanli Facebook: http://facebook.com/ivanontech/ Exclusive email list: http://eepurl.com/c0hyc9 🤑 Buy cryptocurrencies: https://www.coinbase.com/join/529bab0ab08ded7080000019 💰 Secure your Crypto with Hardware Wallets: Ledger: https://www.ledgerwallet.com/r/4607 Trezor: https://trezor.io/?a=rvj3rqtje3ph DISCLAIMER: This is NOT financial advice. This is just my opinions. I am not responsible for any investment decisions that you choose to make. Ivan on Tech is all about cryptocurrencies and the technology behind Bitcoin, Ethereum, Litecoin, Ripple, IOTA. We also cover Bitcoin price, altcoin price, investing, analytics, different altcoins. Ivan on Tech by Ivan Liljeqvist
Views: 9599 Ivan on Tech
dApp Development with Web3 and JavaScript
 
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Now that we’ve built the smart contract, how can we interact with it as a user from a web browser? We’ll show you how dApp development works with web3 and metamask.
Views: 152 ANZ Coders
Inside Ethereum Transactions · Web3.js · #3 Ethereum Blockchain Development Crash Course
 
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► SUBSCRIBE TO THIS CHANNEL ◄ For more videos on how to build decentralized applications on The Ethereum Blockchain: https://www.youtube.com/channel/UCY0xL8V6NzzFcwzHCgB8orQ?sub_confirmation=1 DOWNLOAD FREE VIDEO COURSES: http://www.dappuniversity.com/free-download How to Build Ethereum Dapp (Decentralized Application Development Tutorial) https://youtu.be/3681ZYbDSSk Donate Ether to the channel: 0x39C7BC5496f4eaaa1fF75d88E079C22f0519E7b9 Website: http://dappuniversity.com/ Follow me on Twitter (@DappUniversity): https://twitter.com/DappUniversity Email me: gregory@dappuniversity.com
Views: 2009 Dapp University
Web3.js Utilities · Web3.js · #8 Ethereum Blockchain Development Crash Course
 
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► SUBSCRIBE TO THIS CHANNEL ◄ For more videos on how to build decentralized applications on The Ethereum Blockchain: https://www.youtube.com/channel/UCY0xL8V6NzzFcwzHCgB8orQ?sub_confirmation=1 DOWNLOAD FREE VIDEO COURSES: http://www.dappuniversity.com/free-download How to Build Ethereum Dapp (Decentralized Application Development Tutorial) https://youtu.be/3681ZYbDSSk Donate Ether to the channel: 0x39C7BC5496f4eaaa1fF75d88E079C22f0519E7b9 Website: http://dappuniversity.com/ Follow me on Twitter (@DappUniversity): https://twitter.com/DappUniversity Email me: gregory@dappuniversity.com
Views: 641 Dapp University
Ethereum dApp tutorial - Front end. Part 1
 
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Please read! In this video I introduce the tools that are needed to build a user interface that will allow interaction with the Ethereum blockchain. Web3.js github: https://github.com/ethereum/wiki/blob/master/JavaScript-API.md Meteor: https://www.meteor.com/ Meteor web3: https://atmospherejs.com/ethereum/web3 Metamask: https://metamask.io/ Meteor for begginers. Great tutorials: https://www.youtube.com/playlist?list=PLLnpHn493BHECNl9I8gwos-hEfFrer7TV Creating smart contracts using Solidity: https://www.youtube.com/playlist?list=PLH4m2oS2ratdoHFEkGvwvd7TkeTv4sa7Z If you loved this video, show me the love! BTC - 1LxhkGzGu6q2LSfAGuH2DNBChmLhHkuQzP ETH - 0x9f24bde4cD92560D04A159C30f46E7820e31d95c http://zeltsinger.com/
Views: 48470 Shlomi Zeltsinger
Ethereum Dapp with React JS, Webpack, Web3 & Truffle
 
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► SUBSCRIBE TO THIS CHANNEL ◄ For more videos on how to build decentralized applications on The Ethereum Blockchain: https://www.youtube.com/channel/UCY0xL8V6NzzFcwzHCgB8orQ?sub_confirmation=1 DOWNLOAD FREE VIDEO COURSES: http://www.dappuniversity.com/free-download The Ultimate Ethereum Dapp Tutorial http://www.dappuniversity.com/articles/the-ultimate-ethereum-dapp-tutorial Follow me on Twitter (@DappUniversity): https://twitter.com/DappUniversity Email me: gregory@dappuniversity.com
Views: 5961 Dapp University
Ethereum SignatureStorage Dapp proof of concept using web3.js
 
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This video demonstrates the Ethereum SignatureStorage Dapp. This Dapp is a proof of concept how to store signatures in a smart contract. Disclaimer ------------------ The SignatureStorage Dapp is a proof of concept and should only be used for demonstration purpose. The SignatureStorage Dapp is not production ready. I have no legal experience. If you want to use this proof of concept (poc) you should contact a legal adviser in your country and verify if this poc is a legally sound solution. The SignatureStorage Dapp --------------------------------------------- The Ethereum SignatureStorage Dapp uses the web3.js v0.19.0 library. This proof of concept was created based on a discussion I had with a Dutch company which has a problem regarding to contracts and the signatures needed in order to close the deal. Problem description --------------------------------- Lets assume the ACME company wants to create a movie and hires two actors: Wily Coyote and Elmer Fudd. The ACME company (from now on referred to as “owner”) creates a paper contract and Wily and Elmer(from now on referred to as “signees”) both need to sign the contract in order to close the deal. For each signee, the owner creates a copy of the contract and the owner signs all 3 copies. The owner sends these 3 copies to Wily using the postal service. Wily signs these 3 copies and sends them back to the owner. The owner now sends the 3 copies to Elmer. Elmer signs these 3 copies, he keeps one copy and returns the other 2 to the owner. Finally the owner sends a copy to Wiley. The owner and signees now each have a copy of the contract with all the signatures. In case of a legal dispute each party can use their contract as evidence. Using paper contracts and actual signatures has pros and cons: Pros: - Easy to setup and use. Cons: - Using the postal service takes time compared with sending an email. - Using the postal service costs money think of: mail shipping rates and insurance. - The signees must send contracts back (extra burden for them). Of course the owner can use other solutions such as using SMS as signature or using signature images. But the owner always pays for these third party services. SignatureStorage Dapp ------------------------------------- The SignatureStorage Dapp is an alternative solution to paper contracts. The SignatureStorage Dapp uses the Ethereum blockchain. In this video I will demonstrate how to use the SignatureStorage Dapp and what the costs are. The SignatureStorage Dapp consists of two parts: - A web interface: https://www.mobilefish.com/download/ethereum/SignatureStorage.html - A solidity smart contract: https://www.mobilefish.com/download/ethereum/SignatureStorage.sol.txt Install SignatureStorage Dapp ------------------------------------------------ To install the SignatureStorage Dapp: - First deploy the smart contract. How to deploy a smart contract watch my video “Compile and deploy solidity code”: https://youtu.be/nnVX6fQUu4o - Next change the contract address in the SignatureStorage.html file. For more information watch my video“Ethereum contract Application Binary Interface”: https://youtu.be/F_l4HycnHAI - Download and install the two javascript libraries used by the SignatureStorage.html: The web3.min.js v0.19.0 https://github.com/ethereum/web3.js/tree/0.19.0/dist The sha256.js v3.1.2 https://code.google.com/archive/p/crypto-js/downloadsCryptoJS v3.1.2.zip Use the file: CryptoJS v3.1.2/rollups/sha256.js More information: https://code.google.com/archive/p/crypto-js - Install the SignatureStorage.html on a web server. How to use the SignatureStorage Dapp --------------------------------------------------------------- The SignatureStorage.sol is already deployed on the Rinkeby network. The contract address is: 0x2abdbeab89620b1d0837a9089a1b20447457fad2 Install the Chrome browser and install the MetaMask extension. For more information, watch my video: "MetaMask: How to restore your accounts”: https://youtu.be/cqz8-hOz_nk Open the SignatureStorage.html and click the help link. It will explain how to use the Dapp. Overview maximum transaction fees ----------------------------------------------------------- The Signature Storage Dapp is a proof of concept. I have made no effort to optimise the code to limit the number of operations and thus limit the gas usage. For users it is difficult to calculate the actual transaction fees. More information about transation fees watch my video “Ethereum gas, gas limit, gas price”: https://youtu.be/yFb2nuUUDX0 Check out all my other Ethereum related tutorial videos: https://goo.gl/eNJVXe Subscribe to my YouTube channel: https://goo.gl/61NFzK The presentation used in this video tutorial can be found at: https://www.mobilefish.com/developer/blockchain/blockchain_quickguide_ethereum_related_tutorials.html #mobilefish #howto #ethereum
Views: 924 Mobilefish.com
Tutorial dapp with Solidity, Truffle, Web3 and Javascript
 
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In this video, I tried to explain how to make simple dapp, app based on blockchain and Ethereum platform. App is consistent from Backend part smart contract written in Solidity using framework Truffle. Solidity is Ethereum language for writing smart contracts and Truffle is the most popular development framework for Ethereum with a mission to make your life a whole lot easier. During development we use testrpc. Testrpc is a Node.js based Ethereum client for testing and development. It uses ethereumjs to simulate full client behavior and make developing Ethereum applications much faster. It also includes all popular RPC functions and features (like events) and can be run deterministically to make development a breeze. In these way, we work on the local test network, not on the real network where we would spend real Gas. We use web3 to make your app work on Ethereum. Web3 object provided by the web3.js library. Under the hood, it communicates to a local node through RPC calls. web3.js works with any Ethereum node, which exposes an RPC layer. In frontend we connect with web3 we interact with backend blockchain and performing certain transactions. Then in standard way, we represent it in frontend with JS. For serving app we use Lite-Server Lightweight development only node server that serves a web app, opens it in the browser, refreshes when html or javascript change, injects CSS changes using sockets, and has a fallback page when a route is not found. Written version of this tutorial is here http://truffleframework.com/tutorials/pet-shop If you like the tutorial please leave the comment, subscribe and if you want, be free to donate some crypto: BTC: 12mqJi98dbS6xov4RrcYk2xhLnmZAyksYt ETH: 0x1cDB80B7a34F9fAC75AEC6ea4B68c985cBEA3c14 BCC: 8Fk2gHog9YMFUZUJcrGxFU2TtMPmwBtyW5 Write what you would like to see next, which blockchain development tutorial.
Views: 20951 Blockchain Talks
EthJS: Precision Ethereum Javascript Architecture for dApps
 
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EthJS is a collection of presently 16 precision JS modules made over the past year to support the dApp developers of the Ethereum community. Currently, the modules are being used in the Truffle Suite, web3.js, wafr developer tool, and uport libraries among many other projects. Nick Dodson EthJS developer; Founder and lead developer of WeiFund.
Views: 954 Ethereum Foundation
⛓️ Blockchain Developer Essentials PART 3: ETHEREUM Test RPC and Web3.js
 
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⛓️ Blockchain Developer Essentials PART 3: Test RPC and Web3.js | Vlad Wulf Blockchain Developer 😀😀😀 This is the part you've been waiting for. Learn how to bind you blockchain with your backend using http protocol and send data from the blockchain to the frontend. We are using Test RPC and Web3 version 1.0 👫 Social Networks: Mail: vlad.wulf@outlook.com LinkedIn: https://www.linkedin.com/in/vladimir-a-16334213b/ Steemit: https://steemit.com/@vladwulf Facebook: https://www.facebook.com/VladWulfTutorials/ Twitter: https://twitter.com/VladWulf 😍 Donations: Paypal: agaev.vladimir@gmail.com Ether: 0x854F6C6C00Fc6e197B4f5aC48D1bac4210fE
Views: 7512 Vlad Wulf
Learn Smart Contracts · Web3.js · #2 Ethereum Blockchain Development Crash Course
 
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► SUBSCRIBE TO THIS CHANNEL ◄ For more videos on how to build decentralized applications on The Ethereum Blockchain: https://www.youtube.com/channel/UCY0xL8V6NzzFcwzHCgB8orQ?sub_confirmation=1 DOWNLOAD FREE VIDEO COURSES: http://www.dappuniversity.com/free-download How to Build Ethereum Dapp (Decentralized Application Development Tutorial) https://youtu.be/3681ZYbDSSk Donate Ether to the channel: 0x39C7BC5496f4eaaa1fF75d88E079C22f0519E7b9 Website: http://dappuniversity.com/ Follow me on Twitter (@DappUniversity): https://twitter.com/DappUniversity Email me: gregory@dappuniversity.com
Views: 2478 Dapp University
Deploying Smart Contracts · Web3.js · #4 Ethereum Blockchain Development Crash Course
 
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► SUBSCRIBE TO THIS CHANNEL ◄ For more videos on how to build decentralized applications on The Ethereum Blockchain: https://www.youtube.com/channel/UCY0xL8V6NzzFcwzHCgB8orQ?sub_confirmation=1 DOWNLOAD FREE VIDEO COURSES: http://www.dappuniversity.com/free-download How to Build Ethereum Dapp (Decentralized Application Development Tutorial) https://youtu.be/3681ZYbDSSk Donate Ether to the channel: 0x39C7BC5496f4eaaa1fF75d88E079C22f0519E7b9 Website: http://dappuniversity.com/ Follow me on Twitter (@DappUniversity): https://twitter.com/DappUniversity Email me: gregory@dappuniversity.com
Views: 1298 Dapp University
Ethereum - javascript "eth" object
 
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the code in the clip can be found here: https://github.com/jgabios/dummyinterface If you like it, you can send some bitcoins here: 15inPdfh38fv9zEE1h977PeHWFgQDvGgw4
Views: 1165 gabriel munteanu
How to connect from JavaScript to Solidity using Web3.js and Truffle-Contract
 
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In this Ethereum Session I'll show you how to use Web3.js and Truffle-Contract on a lower-level. So you understand exactly how the communication between JavaScript and the Blockchain-Node works. This can be applied to any JavaScript Framework or even outside of that to any programming language. My Website: https://vomtom.at Ethereum Course: https://www.udemy.com/blockchain-developer/?couponCode=YOUTUBE15 GERMAN Ethereum Course 2018/19: https://www.udemy.com/ethereum-blockchain-entwicklung/?couponCode=YOUTUBE50 Code for the Ethereum Session: https://gist.github.com/tomw1808/f5146545e91895ac67bfea54717b352d Don't forget to subscribe to get updates! Let me know in the comments what you think.
Views: 186 Toms Courses
Building an Ethereum/React App
 
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Building an Ethereum/React crowdfunding app.
Views: 1107 RallyCoding
Smart Contract Events · Web3.js · #6 Ethereum Blockchain Development Crash Course
 
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► SUBSCRIBE TO THIS CHANNEL ◄ For more videos on how to build decentralized applications on The Ethereum Blockchain: https://www.youtube.com/channel/UCY0xL8V6NzzFcwzHCgB8orQ?sub_confirmation=1 DOWNLOAD FREE VIDEO COURSES: http://www.dappuniversity.com/free-download How to Build Ethereum Dapp (Decentralized Application Development Tutorial) http://www.dappuniversity.com/articles/the-ultimate-ethereum-dapp-tutorial Donate Ether to the channel: 0x39C7BC5496f4eaaa1fF75d88E079C22f0519E7b9 Website: http://dappuniversity.com/ Follow me on Twitter (@DappUniversity): https://twitter.com/DappUniversity Email me: gregory@dappuniversity.com
Views: 924 Dapp University
Writing Smart Contracts · Web3.js · #5 Ethereum Blockchain Development Crash Course
 
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► SUBSCRIBE TO THIS CHANNEL ◄ For more videos on how to build decentralized applications on The Ethereum Blockchain: https://www.youtube.com/channel/UCY0xL8V6NzzFcwzHCgB8orQ?sub_confirmation=1 DOWNLOAD FREE VIDEO COURSES: http://www.dappuniversity.com/free-download How to Build Ethereum Dapp (Decentralized Application Development Tutorial) https://youtu.be/3681ZYbDSSk Donate Ether to the channel: 0x39C7BC5496f4eaaa1fF75d88E079C22f0519E7b9 Website: http://dappuniversity.com/ Follow me on Twitter (@DappUniversity): https://twitter.com/DappUniversity Email me: gregory@dappuniversity.com
Views: 996 Dapp University
Inspecting Blocks · Web3.js · #7 Ethereum Blockchain Development Crash Course
 
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► SUBSCRIBE TO THIS CHANNEL ◄ For more videos on how to build decentralized applications on The Ethereum Blockchain: https://www.youtube.com/channel/UCY0xL8V6NzzFcwzHCgB8orQ?sub_confirmation=1 DOWNLOAD FREE VIDEO COURSES: http://www.dappuniversity.com/free-download How to Build Ethereum Dapp (Decentralized Application Development Tutorial) https://youtu.be/3681ZYbDSSk Donate Ether to the channel: 0x39C7BC5496f4eaaa1fF75d88E079C22f0519E7b9 Website: http://dappuniversity.com/ Follow me on Twitter (@DappUniversity): https://twitter.com/DappUniversity Email me: gregory@dappuniversity.com
Views: 567 Dapp University
Exploring Ethereum with Web3 Tutorial: Part 1 - Checking Balances
 
12:58
Get FREE access to more content like this at http://www.techmaker.tv. Get a quick and easy understanding of how you can interact with Ethereum via Javascript. Helpful Links: Ethereum - http://ethereum.org/ Web3 - http://web3js.readthedocs.io/en/1.0/ Infura - http://infura.io/ Etherscan - http://www.etherscan.io
Views: 724 TechmakerTV
Ethereum Tutorial - JS Decentralized Apps with Ethereum
 
12:23
Learn more advanced front-end and full-stack development at: https://www.fullstackacademy.com Arnoldo Mora shows you the basic concepts to understand the Ethereum Blockchain ecosystem, its history and why this is a great moment to get started developing with it. You will be able to start using the basic tool set of the JS-Ethereum developer. Will go through a fully functional demo app with Node.js, TestRPC, Truffle and Web3.js in just 10 minutes. Clone, install, run and get started!
Views: 9027 Fullstack Academy
Solidity Event Listener in Web3
 
15:24
In todays video we will look at how we can listen for events using the Web3 API. We will build a simple webpage that fetches data from a smart contract and will update it when events fire in the contract. The code is available here: https://github.com/filipmartinsson/Solidity/tree/master/bankevent
Views: 518 Filip Martinsson
Use Web3.JS 1.0 with Truffle feat. Roman Storm - @rstormsf @trufflesuite
 
22:49
► SUBSCRIBE TO THIS CHANNEL ◄ For more videos on how to build decentralized applications on The Ethereum Blockchain: https://www.youtube.com/channel/UCY0xL8V6NzzFcwzHCgB8orQ?sub_confirmation=1 DOWNLOAD FREE VIDEO COURSES: http://www.dappuniversity.com/free-download How to Build Ethereum Dapp (Decentralized Application Development Tutorial) https://youtu.be/3681ZYbDSSk Donate Ether to the channel: 0x39C7BC5496f4eaaa1fF75d88E079C22f0519E7b9 Website: http://dappuniversity.com/ Follow me on Twitter (@DappUniversity): https://twitter.com/DappUniversity Email me: gregory@dappuniversity.com
Views: 421 Dapp University
Ethereum DApp beginner level tutorial 7 - Front-end JavaScript
 
08:34
———————————————————— References for this tutorial: https://ethereum.org/ https://solidity.readthedocs.io/en/v0.4.24/ https://github.com/ethereum/web3.js/ Solidity tutorials : https://www.youtube.com/playlist?list=PLL5pYVd8AWtT6vcvLo6vHv3EmtsqiQBxy ———————————————————— CodeXpert links : Website : thecodexpert.org Steemit : https://steemit.com/@codexpert DTube : https://d.tube/#!/c/codexpert Discord : https://discord.gg/t36kuCt Youtube : https://www.youtube.com/channel/UCb3Rrg2t4PZ59Sna497DUZA?view_as=subscriber Twitter : https://twitter.com/ThisIsCodeXpert Facebook : https://www.facebook.com/OfficialCodeXpert/ ———————————————————— Get 500 CodeXpert ERC20 tokes for free : Subscribe to CodeXpert Youtube channel Like this video Paste your Ethereum address in comments below Join Discord : https://discord.gg/t36kuCt Write : #GiveMeTokens “ETH Address” in Discord And lucky winners will receive tokens! ———————————————————— Donate bitcoin : 34UTkFhPpfq9jNFNSDsNcWHpeTPfngBTiW Donate Ethereum : 0x2B24efe2007a284aA1fE0489123166b745f8651b
Views: 11 CodeXpert
Building And Deploying Ethereum Smart Contracts With Solidity and JavaScript
 
23:14
Watch this talk to learn how to build smart contracts on top of Ethereum platform. We will also cover how to use Solidity and JavaScript for smart contracts development as well as how to design and deploy basic contract to the Ethereum blockchain. EVENT: Talk recording from AmsterdamJS March 2018 Meetup SPEAKER: Mikhail Kuznetcov PERMISSIONS: AmsterdamJS Meetup Organizer provided Coding Tech with the permission to republish this video. CREDITS: Amsterdam JSNation YouTube channel: https://www.youtube.com/channel/UCQM428Hwrvxla8DCgjGONSQ
Views: 6760 Coding Tech
How To Write A React DApp For Ethereum - Setting The Web3.js Provider With MetaMask - Video 1
 
03:17
Check out the full course at www.reactdapps.com! If you're learning how to write decentralized applications (DApps) for Ethereum, this is for you. In this mini video series, you'll learn how to set a Web3.js provider with MetaMask using Redux. This is a fundamental feature required for any user-facing DApp. ------------------------------------------------------------------------ www.reactdapps.com Learn how to develop a professional UI for an Ethereum Decentralized Application (DApp) using React, Redux, Webpack and Truffle! Receive step-by-step guidance by an industry expert on how to connect an industry-standard UI to a Smart Contract, and learn how to integrate MetaMask into your DApp. You'll also learn how to use the Redux design pattern in conjunction with Web3.js to create a scalable user-facing DApp.
Views: 141 Hacking Beauty
Exploring Ethereum with Web3 Tutorial: Part 2 - Interacting with Smart Contracts
 
12:05
Get FREE access to more content like this at http://www.techmaker.tv. Get a quick and easy understanding of how you can interact with Ethereum via Javascript. In this episode, we dive into what a JSON ABI is, how to instantiate a new contract in Web3.js with your JSON ABI, and how to run functions on the smart contract with Javascript. Helpful Links: Ethereum - http://ethereum.org/ Web3 - http://web3js.readthedocs.io/en/1.0/ Infura - http://infura.io/ Etherscan - http://www.etherscan.io
Views: 342 TechmakerTV
Ethereum and Javascript - what's the big deal? - JSConf.Asia 2018
 
03:23:24
Speakers: Dave Appleton @appletondave Raman Shalupau @ksaitor Ethereum is the wunderkid of the blockchain space. Decentralised Smart Contracts coupled with web3.js mean that you can integrate your distributed app with your front-end to improve your user experience. Requirements: A notebook with chrome would be preferable. Good options to install would be parity and/or metamask as well as the usual tools. Dave is the lead blockchain developer for HelloGold in Malaysia where he attempts to bring a better means of saving to those not well served by the finance industry. Between raising awareness of phishing attacks and scams, he spents his time as a programmer, hardware engineer and lecturer in Singapore and Malaysia. Raman is a full-stack JavaScript consultant by day and entrepreneur by night. He’s been working with such companies like Redmart, Nugget, Cinarra, Smove and Load Impact. Currently he’s fascinated with the world of cryptocurrencies and playing with Solidity and Smart Contracts on Ethereum. He’s also a founder of Crypto Jobs List. Event Page: https://2018.jsconf.asia Produced by Engineers.SG Recorded by: Michael Cheng Help us caption & translate this video! https://amara.org/v/eoMV/
Views: 233 Engineers.SG
IoT + Ethereum -- Raspberry Pi, NodeJS, Web3 & Solidity Pt1: Blink an LED on events
 
30:21
A basic led blinking example, driven by smart contract events. *Github ( https://github.com/nacmonad/eth-iot-examples/) Pre-Requisites: Node JS - https://github.com/nodesource/distributions Ethereum Test RPC - https://github.com/ethereumjs/testrpc Remix - Solidity Browser Compiler - https://github.com/ethereum/browser-solidity Web3 -- https://github.com/ethereum/web3.js 0:00-10:00 --- pi node js server 10:00-20:30 --- TestRPC and Browser-Solidity 20:30-FIN --- WEB3 and interacting with Smart Contract ERRATA: @10:20 -- the mnemoic is used to generate the 10 public/private keypairs and has nothing to do with the coinbase @22:22 -- coinbase is just the wallet public key that is associated with the Web3 instance. has nothing to do with genesis blocks.
Views: 1630 rustcity
Geth communication
 
19:00
Geth is the Go implementation of the Ethereum protocol. This tutorial demonstrates 4 ways to communicate with Geth: - Console mode using the JavaScript Runtime Environment - Script mode using the JavaScript Runtime Environment - Using HTTP (HypertextTransfer Protocol) The geth flags rpcapi, rpccorsdomain and rpc are explained. - Using IPC (Inter Process Communication) using the geth.ipc file. The geth flag ipcdisable is explained. This tutorial also explains what JSON-RPC is. Check out all my other Ethereum related tutorial videos https://goo.gl/eNJVXe Subscribe to my YouTube channel: https://goo.gl/61NFzK The presentation used in this video tutorial can be found at: https://goo.gl/snd1F4 JavaScript Runtime Environment https://github.com/ethereum/go-ethereum/wiki/JavaScript-Console JSON RPC API https://github.com/ethereum/wiki/wiki/JSON-RPC Management APIs https://github.com/ethereum/go-ethereum/wiki/Management-APIs Web3.js API https://github.com/ethereum/wiki/wiki/JavaScript-API Mobilefish.com: Using web3 API with MetaMask http://www.mobilefish.com/download/ethereum/web3api.html #mobilefish #howto #ethereum #geth
Views: 3716 Mobilefish.com
Building Dapps with Web3 and Meteor
 
19:36
I created this video with the YouTube Video Editor (http://www.youtube.com/editor)
Views: 1404 Jeff Anthony
Calling A Smart Contract Method From Web3 (1.0) | Ep 4
 
11:04
Let's learn how to call a smart contract method, once it is already deployed to the Ethereum network. Like this channel? Subscribe here: https://www.youtube.com/channel/UCZM8XQjNOyG2ElPpEUtNasA In this video tutorial for Ethereum we are going to use: - web3 for the JSON RPC client - Ethereumjs-testrpc for the Ethereum client We will learn the difference between calling a smart contract method using the eth_call vs using the eth_sendTransaction JSON RPC method. We will also learn about the concept of gas and gasPrice in transactions. Links: - Source Code: https://github.com/jklepatch/eattheblocks/tree/master/episode4 - Official Website https://eattheblocks.com - Author Website: https://www.julienklepatch.com
Views: 1102 Eat The Blocks
Exploring Ethereum with Web3 Tutorial: Part 4 - Examining Blocks
 
07:17
Get FREE access to more content like this at http://www.techmaker.tv. Get a quick and easy understanding of how you can interact with Ethereum via Javascript. In this episode, we look into what makes up a block, how to access the transactions inside, and what you could potentially do with that information. Helpful Links: Ethereum - http://ethereum.org/ Web3 - http://web3js.readthedocs.io/en/1.0/ Infura - http://infura.io/ Etherscan - http://www.etherscan.io
Views: 100 TechmakerTV
IoT + Ethereum -- Raspberry Pi, NodeJS, Web3 & Solidity  Pt2
 
31:22
Using a switch to get our PI node to send a command/tx with our smart contract. *** Github : https://github.com/nacmonad/eth-iot-examples/ *** 0:00 intro + nodejs/raspi gpio 10:10 testrpc + solidity 20:45 web3 on node So there's no more annotations.... RPi switch: INPUT PIN 3 o----------o \ GND =----/\/\/\----------o 10k The above isn't proper, but it works. My Pi's input pin float high (is this normal?). I just pull-down through a 10k resistor to drop the GPIO low. Otherwise, when its open the GPIO floats high. To do it properly follow something like this: https://www.cl.cam.ac.uk/projects/raspberrypi/tutorials/robot/buttons_and_switches/
Views: 1047 rustcity
How To Write A React DApp For Ethereum - Setting The Web3.js Provider With MetaMask - Video 2
 
04:28
Check out the full course at www.reactdapps.com! If you're learning how to write decentralized applications (DApps) for Ethereum, this is for you. In this mini video series, you'll learn how to set a Web3.js provider with MetaMask using Redux. This is a fundamental feature required for any user-facing DApp. ------------------------------------------------------------------------ www.reactdapps.com Learn how to develop a professional UI for an Ethereum Decentralized Application (DApp) using React, Redux, Webpack and Truffle! Receive step-by-step guidance by an industry expert on how to connect an industry-standard UI to a Smart Contract, and learn how to integrate MetaMask into your DApp. You'll also learn how to use the Redux design pattern in conjunction with Web3.js to create a scalable user-facing DApp.
Views: 94 Hacking Beauty
3 Most Common Ways to create new Ethereum accounts - MEW Web3 Parity
 
23:01
General Inquires: https://t.me/lingqingmeng Video notes: https://gist.github.com/lingqingmeng/d54a1d69e40ba7bb02dfc696d6666e77 Description: expand below ------------------- This video is me go over the most common ways to create an Ethereum account. I explain the tradeoffs between each method and go super indepth into explaining how each way differs. All in all with these 3 methods you should be equipped in the majority of situations
Views: 288 Ling Qing Meng
Ethereum and React: An Introduction to Building Your First Web dApp
 
37:14
Ethereum, a blockchain based technology, empowers you to write decentralized applications (dApps) utilizing smart contracts and the Ethereum Virtual Machine. Sound scary? It’s not. Did you know that that you can create web-based applications on top of Ethereum? That its language, Solidity, shares similarities to JavaScript? That tools exist to leverage popular front-end frameworks like React? This session will serve as an introduction to dApp development with the goal of setting a baseline to understand the core concepts and tools you need to start hacking away at the bleeding edge. Some of the topics we’ll cover include: understanding Ethereum and smart contracts, setting up a local blockchain testnet environment, the Truffle framework, Metamask plugin, the Solidity language and building React components to execute contracts that interact with the blockchain. EVENT: DrupalCon Nashville 2018 SPEAKER: Ryan Hagerty PERMISSIONS: Original video was published with the Creative Commons Attribution license (reuse allowed). CREDITS: Original video source: https://www.youtube.com/watch?v=2c3PT9NuFJ8&t=254s
Views: 9105 Coding Tech
How To Write A React DApp For Ethereum - Setting The Web3.js Provider With MetaMask - Video 6
 
04:12
Check out the full course at www.reactdapps.com! If you're learning how to write decentralized applications (DApps) for Ethereum, this is for you. In this mini video series, you'll learn how to set a Web3.js provider with MetaMask using Redux. This is a fundamental feature required for any user-facing DApp. ------------------------------------------------------------------------ www.reactdapps.com Learn how to develop a professional UI for an Ethereum Decentralized Application (DApp) using React, Redux, Webpack and Truffle! Receive step-by-step guidance by an industry expert on how to connect an industry-standard UI to a Smart Contract, and learn how to integrate MetaMask into your DApp. You'll also learn how to use the Redux design pattern in conjunction with Web3.js to create a scalable user-facing DApp.
Views: 68 Hacking Beauty
How To Write A React DApp For Ethereum - Setting The Web3.js Provider With MetaMask - Video 3
 
02:42
Check out the full course at www.reactdapps.com! If you're learning how to write decentralized applications (DApps) for Ethereum, this is for you. In this mini video series, you'll learn how to set a Web3.js provider with MetaMask using Redux. This is a fundamental feature required for any user-facing DApp. ------------------------------------------------------------------------ www.reactdapps.com Learn how to develop a professional UI for an Ethereum Decentralized Application (DApp) using React, Redux, Webpack and Truffle! Receive step-by-step guidance by an industry expert on how to connect an industry-standard UI to a Smart Contract, and learn how to integrate MetaMask into your DApp. You'll also learn how to use the Redux design pattern in conjunction with Web3.js to create a scalable user-facing DApp.
Views: 50 Hacking Beauty
How To Write A React DApp For Ethereum - Setting The Web3.js Provider With MetaMask - Video 9
 
02:27
Check out the full course at www.reactdapps.com! If you're learning how to write decentralized applications (DApps) for Ethereum, this is for you. In this mini video series, you'll learn how to set a Web3.js provider with MetaMask using Redux. This is a fundamental feature required for any user-facing DApp. ------------------------------------------------------------------------ www.reactdapps.com Learn how to develop a professional UI for an Ethereum Decentralized Application (DApp) using React, Redux, Webpack and Truffle! Receive step-by-step guidance by an industry expert on how to connect an industry-standard UI to a Smart Contract, and learn how to integrate MetaMask into your DApp. You'll also learn how to use the Redux design pattern in conjunction with Web3.js to create a scalable user-facing DApp.
Views: 80 Hacking Beauty
[이더리움 dAPP 만들기] web3.js 라이브러리 맛보기
 
15:39
Management API : https://github.com/ethereum/go-ethereum/wiki/Management-APIs JSON RPC API : https://github.com/ethereum/wiki/wiki/JSON-RPC#go html 파일에 adding web3.js : https://github.com/ethereum/wiki/wiki/JavaScript-API#adding-web3 이더리움 dAPP 만들기 튜토리얼 기초 과정입니다. 이 강의에서 다룰 주제로는 Geth, Web3.js, Solidity, Truffle.js, Mist 등이 있고 추후에 더 추가될계획입니다. 기초과정 이후 Advanced 과정에서는 이더리움 코어 스터디와 4세대 블록체인 Openhash platform에대한 스터디를 진행합니다 질문이 있거나 이해가안가시는분들은 댓글로 남겨주세요. 이메일 : chaeju106@gmail.com 페이스북 : https://www.facebook.com/seungju.chae.9
Views: 97 Solidify