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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 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: 64632 DesignCourse
Web3 Providers (039)
 
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https://www.youtube.com/watch?v=1Lbw5FaRX_I&t=110s https://www.youtube.com/watch?v=fGZcIw94nrA&t=105s https://www.youtube.com/watch?v=XZ_N_65fyY8&t=91s https://www.youtube.com/watch?v=cN69_QJF_Us&t=59s https://www.youtube.com/watch?v=V9xcRiI8FdE&t=53s https://www.youtube.com/watch?v=xEiClLvB88M&t=50s https://www.youtube.com/watch?v=4pziMI6QZtw&t=36s https://www.youtube.com/watch?v=O8mMU_cfzCA&t=41s https://www.youtube.com/watch?v=GrfVaiUS5DI&t=55s https://www.youtube.com/watch?v=2iyywu5wP-0&t=146s https://www.youtube.com/watch?v=qqGYtr8EZOQ&t=12s https://www.youtube.com/watch?v=kCV1U2ymxhA&t=65s
Views: 57 R.I.S.E.
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: [email protected]
Views: 3034 Dapp University
5. BLS aggregation by Vitalik Buterin and Justin Drake (Ethereum Foundation)
 
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The Ethereum Sharding Meeting #2 - Berlin 5. BLS aggregation by Vitalik Buterin and Justin Drake (Ethereum Foundation) Resources: https://notes.ethereum.org/s/B1-7aivmX --- Video: Anton Tal @antontal Audio: Matteo Tambussi @matlemad Producer: Chris Hobcroft @chrishobcroft Executive Producer: Doug Petkanics @petkanics For @livepeertv on behalf of @LivepeerOrg
Views: 354 Ethereum Foundation
Governance in Web2 vs. Governance in Web3 by Vlad Zamfir at Web3 Summit 2018
 
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Ethereum Foundation researcher Vlad Zamfir compares governance in Web2 vs. governance in Web3. This video was recorded at Web3 Summit 2018 in Berlin.
Views: 1219 Web3 Foundation
Ethereum BlockChain Tutorial - Ethereum BlockChain Installation on Window - Part1
 
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Our intention is to make new technologies & emerging tools installation easy for students, beginners & experienced professionals. Prerequisities - To install Nodejs - https://youtu.be/SS7V8OUOzIM Installation Commands - 1. Ethereum - npm install ganache-cli 2. npm install [email protected] 3. Web3 = require('web3') web3 = new Web3(new Web3.providers.HttpProvider("http://localhost:8545")); 4. To view all the accounts available on Ethereum web3.eth.accounts
Views: 1806 Abhishek Jain
Web3: Decentralization in the Information Age by Aeron Buchanan at Web3 Summit 2018
 
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W3F Executive Vice President Aeron Buchanan kicks off Web3 Summit with a talk on organizing humans. Aeron reviews the relationship between humanity and decentralization through history. This video was recorded at Web3 Summit 2018 in Berlin.
Views: 617 Web3 Foundation
Can Blockchains Solve Ten Years of Standardization Failure? by Harry Halpin at Web3 Summit 2018
 
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Inria research scientist Harry Halpin presents the history of the web and why we failed to decentralize it. This video was recorded at Web3 Summit 2018 in Berlin.
Views: 825 Web3 Foundation
Ethereum- Infura Intro and Deploy Smart Contract To Testnet using Infura
 
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Visit our website for more details http://www.tutorialsdiary.com This video provide introduction to Infura and show how to connect to different ethereum blockchain using Infura. This also cover about deloyment of smart contract to Ethereum testnet without downloading whole blockchain to your system using Infura. Infura Website https://infura.io Below are the high level steps 1. Create Truffle project. 2. Run below command to install hd wallet provider. npm install truffle-hdwallet-provider In case you encounter any issue on windows then run below command npm install -g windows-build-tools  3. Create key from Infura site. 4. Add code in truffle.js file.
Views: 1086 Tutorials Diary
Ethereum ÐΞVcon-0: Solidity, Vision and Roadmap
 
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Dr. Gavin Wood and Dr. Christian Reitwiessner present the vision and roadmap of Solidity, the smart contract programming language. Try it now:- http://chriseth.github.io/cpp-ethereum/
Views: 3291 Ethereum
Solidity File Deployment Using Ethereum through Web #Part 02
 
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#blockchainbanglatutorial #soliditybanglatutorial #cryptocurrencybanglatutorial Solidity File Deployment Using Ethereum through Web #Part 02 Ethereum ( developed using solidity ) Smart Contract into a useful web application. This is the 3rd part of the Ethereum Smart Contact development blog series. If this is the first post you are referring, I recommend you to visit previous posts and get some understanding about Smart Contract development using Solidity in Ethereum. I am going to use the same Smart Contract that we have developed in the previous parts in this example as well. I’m just adding a user interface layer into a previously deployed Smart Contract in this post. Following are the other topics in this blog series. Develop a Smart Contract in Solidity and deploy it in one of the test networks Automate the testing and deploying your Smart Contract in a real network ( Rinkeby Network ) Build a front-end web layer to interact with deployed Smart Contract ( This post ) Deploy the Smart Contract on your own multi-node Ethereum network In this post I am using the ReactJs web toolkit to develop a web application to interact with the deployed Smart Contact in the Ethereum Rinkerby network. You can use any other language/tool to develop the web front-end but, ReactJs contains good tools where you can easily integrate with Web3 framework compared to other tools. First of all we need to install the npm package to create a React App. sudo npm install -g create-react-app Then we need to create the react app using following command. create-react-app multi-auth When you create your react application, it would create a boilerplate template where you can start to work with. It contains the main required files such as the index.heml, app.js , index.js , index.css etc.. Web3 is the package that we are going to use as an interface with deployed Smart Contract and to access the crypto wallet ( MetaMask) npm install — save [email protected] Now we have stuff to start with our development work. Before going into the dev work, there is one little thing I like to explain. I hope by this time , you are familiar with the MetaMask wallet. If you have installed it in your browser as a plug-in, it automatically adds a web3 provider into your browser. So when we are developing our web app, we can use the same plugin. However, the problem is the default Web3 version that is getting installed with MetaMask is in version 0.2* ( as of this writing date). But we need Web3 version 1.0 to work with our Smart Contracts. Hence, what we need to do is override the MetaMask’s default version with the version that we need. Following diagram depicts the format of the Web3 providers. Image : ReactJs App interface with Web3 Next we have to setup the required libraries and the boilerplate project. Now, lets focus on how to process with the coding to interact with our deployed Smart Contract in the Rinkerby network. First of all, we need to create a js file to specify our ABI( Application Binary Interface ) and the deployed address. If you do not know how to get it, please refer my previous posts in this blog series. In this example, I am going to use the multiauth.js file to fulfill this requirement. import web3 from './web3'; const deployeAddress = class App extends Component { constructor(props){ super(props); this.state = {requester : '', receiver:'', balance: '', export default App; As soon as all components are rendered ( componentDidMount method ), application accesses the required information about this Smart Contract. We can render those information in the render method. ethereum dapp tutorial, truffle ethereum, smart contract editor, ethereum react, truffle react tutorial, remix ethereum og, remix ethereum,
Views: 103 Knowledge Seeker
Deploy Smart Contracts to Public Blockchain with Truffle HD Wallet & Infura - Ethereum
 
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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: [email protected]
Views: 1901 Dapp University
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: 15024 Mobilefish.com
Build Ethereum Smart Contract for Healthcare sector | in 20 mins | Complete tutorial
 
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———————————————————— References for this tutorial: https://ethereum.org/ https://solidity.readthedocs.io/en/v0.4.24/ https://remix.ethereum.org ———————————————————— 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: 225 CodeXpert
3 Compile and run your first smart contract against local private node  - Ethereum from scratch
 
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Welcome to episode 3 of my series on Ethereum for beginners - hands on tutorials that you can follow step by step to gradually build awareness of the protocol. In this video I describe how to install the local copy of the browser-solidity compiler so you can compile and deploy smart contracts against your own private Ethereum networks. Steps/main commands below: ******* Go to this link https://github.com/ethereum/browser-solidity/tree/gh-pages ********** Download the zip file and copy/extract to local folder ************* Open index.html **************** Paste this into the window pragma solidity ^0.4.0; contract greeter { string greeting; function greeter(string _greeting) public { greeting = _greeting; } function greet() constant returns (string){ return greeting; } function calculateProof(string document) constant returns (bytes32) { return sha256(document); } } ****************** REMEMBER TO RECONNECT THE BROWSER TO THE Web3Provider WHENEVER YOU RESTART **************** Choose the web3.provider and type http://localhost:8545 *************** Make sure geth is started geth --datadir "(dir)" --nodiscover --rpc --rpcport "8545" --rpccorsdomain "*" console 2 &gt console.log Add the rpc flags above - they are all necessary (have removed all other flags to hide noise) **************** Ensure the account is unlocked personal.unlockAccount(eth.accounts[0]) *****************
Views: 15427 Matt Thomas
Intro to Ethereum Dapps
 
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Intro to Etheruem Dapps https://blockgeeks.com/ In this lesson, we’ll learn about building decentralized applications, or dapps. But first, let’s take a minute to appreciate the difference between dapps and regular web applications In traditional web application architecture, there is a frontend client and a backend server. The frontend is written using HTML/CSS/JS and the backend is written in a framework of your choice like Rails, Node or Django. The front and backend interact with each other by sending JSON messages over HTTP. There is typically a hosting service where your backend would be running like AWS. With decentralized applications, there is also a frontend client and a backend server. The frontend is written using the same HTML/CSS/JS, but for the backend we use a blockchain like Ethereum. The front and backend would still be interacting with each other using JSON messages. This architecture is a bit oversimplified, but the point is that the end-user will not be able to tell whether they are interacting with a dapp or any other regular web app; the change would be invisible and in the background. The traditional client-server architecture is so common that its rarely revisited. Should we still be building apps this way knowing everything we know now? Let’s take a look at some of the issues with the traditional client-server architecture. The first issue is that your server is running on a centralized hosting service who you outsource your hosting needs to. As more and more people around the world use the same popular hosting service, it becomes a single point of failure for the entire internet. Think about it: to take down all the sites that are running their backend on this popular hosting service, all you would have to do is disrupt this one provider’s infrastructure, in order to take down potentially half the internet! This isn’t a very resilient architecture for the web. It’s also an increasing amount of pressure on a single organization to expect them to build and maintain all this infrastructure for the entire world. Centralized servers are also easy to censor and control. Taking down a web application is as simple as removing it from the centralized server. This can happen at the state level where government agencies request hosting providers to take down certain websites they may not like or agree with. But if your application was running everywhere, taking it down would not be as straightforward. To censor a blockchain application, you would have to takedown all the network nodes simultaneously. The Ethereum blockchain currently has over 25,000 nodes spread around the world. When we increasingly rely on centralized services, we create honeypots of data for attackers. We have seen this time and time again with various hacks, the most recent being the Equifax hack. Equifax is a centralized credit reporting service, and they were responsible for maintaining millions of user’s personal credit information including social security numbers. Millions of people put their trust in this one organization to keep their data safe from getting into the wrong hands. As a potential attacker, its very lucrative to hit just one database and get access to millions of people’s sensitive data that you could then use to open credit cards for example. With a decentralized database like a blockchain, data attacks are not as trivial as getting access to a single database. Another issue with the traditional client-server architecture is that of data integrity. Along with your backend server, the database powering your application is also likely running on the same hosting service. Assuming you trust your hosting provider 100%, this isn’t an issue. But how can you be sure? What’s stopping an unauthorized employee at the hosting service from making changes to the data in your database? And what if your database contained people’s sensitive information, like bank account balances? That’s an awful lot of trust to put into any single organization with the most valuable part of your application: your data. In fact, data is so valuable that many companies are built on the very premise of selling your data. They do this by creating a centralized website for users to interact with, by either posting photos or entering search words. They record your interactions to a database, and then sell your interaction data to advertisers for lots of money without your knowledge or consent. Think about that: all the data that is generated by everyone in the world is monetized by only a handful of companies. With decentralized applications, users can regain control of their data and decide for themselves whether to monetize it by choosing to sell to advertisers or not. And they get to keep the money, not some other company. For more check out https://blockgeeks.com/
Views: 30411 Blockgeeks
How to Develop Advanced DApps Using Embark - Iuri Matias
 
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Introducing Embark 2.0; What’s new, and how to develop & test advanced DApps Slides https://ethereumfoundation.org/devcon/wp-content/uploads/2016/10/How-to-Develop-Advanced-DApps-Using-Embark.pdf
Views: 1707 Ethereum Foundation
Ethereum Wallet Provider Setup (052)
 
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The subsequent video would not load (thanks YouTube) without rhyme or reason. So here is a link to video number 50: https://s3.amazonaws.com/smart-contract-deployment-video/Smart+Contract+Deployment+with+Infura+(050).mp4 To follow older videos in sequence follow videos below: https://www.youtube.com/watch?v=GrfVaiUS5DI&t=41s https://www.youtube.com/watch?v=2iyywu5wP-0&t=210s https://www.youtube.com/watch?v=qqGYtr8EZOQ&t=70s https://www.youtube.com/watch?v=kCV1U2ymxhA https://www.youtube.com/watch?v=k6FNwD12RHk&t=73s https://www.youtube.com/watch?v=U2SY9n9cuAY&t=48s https://www.youtube.com/watch?v=RL_KZvYT1ew&t=149s https://www.youtube.com/watch?v=t_a9V3gY8XM&t=290s https://www.youtube.com/watch?v=esB7Vd6TWQ4&t=26s https://www.youtube.com/watch?v=PNu7-rvWObM&t=314s https://www.youtube.com/watch?v=crwJOAVgL6Y&t=21s https://www.youtube.com/watch?v=H5nRIH6TEHY
Views: 56 R.I.S.E.
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: 22166 What The Func?
Geth supporting SSL using reverse proxy server
 
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At this moment Geth does not support SSL. A reverse proxy server can be used to access a Geth node by SSL. This video explains how to setup a very simple reverse proxy server. Prerequisites --------------------- To setup a reverse proxy server you need a SSL certificate. In this video a reverse proxy server will be setup for testing and development purpose. Therefore the SSL certificate does not need to be issued by a "real" Certificate Authority. A self signed SSL certificate will suffice. In this video I will be using an already created self signed SSL certificate. How I created my own self signed SSL certificate is explained in YouTube video: "Create self signed certificates with Subject Alternative Names" https://youtu.be/qoS4bLmstlk I assume you already have installed the node package manager. See: https://nodejs.org Problem description -------------------------------- A web application can access a local running Geth node using the web3.js library. Code to create an injected web3 instance: var web3 = new Web3(new Web3.providers.HttpProvider("http://localhost:8545")); But when the web application is secured (https) the Geth node can be accessed by http://localhost:8545 but you will get a warning message. Example: https://sand.mobilefish.com/download/ethereum/ethereum_show_all_accounts.html To solve the problem, the Geth node should be accessible by https://localhost:8545. However this is not possible, at least not in Geth v1.7 (maybe in the future?) Solution ------------- The solution is to setup a reverse proxy server. - Web app: https://sand.mobilefish.com/download/ethereum/ethereum_show_all_accounts.html Web3.providers.HttpProvider(“https://proxy.mobilefish.com:9070”) - Reverse proxy server: Listen: https://proxy.mobilefish.com:9070 Target: http://localhost:8545 - Geth node: http://localhost:8545 Setup reverse proxy server ------------------------------------------ The procedure described is also documented at: https://www.mobilefish.com/developer/blockchain/ blockchain_quickguide_geth_suppor t_ssl.html 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: 1706 Mobilefish.com
Infura Demo
 
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Infura is an API provider of Ethereum Nodes that enables developers to bootstrap into the network. This presentation gives an insiders view into what is going on in the network.
Views: 739 ConsenSysMedia
Ethereum Games & Collectibles Explained – The ERC721 token
 
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In this video, I talk about Ethereums new non fungible ERC721 token standard, and how this token is allowing the creation of a whole new suite of gaming applications on Ethereums protocol. This new standard will bring in a whole new wave of use cases for Ethereum in the years to come! 🐨 Cryptocurrency Australia Official Site https://cryptocurrencyaus.com/ 💰 The main exchange I use in Australia to buy Cryptocurrencies http://cryptocurrencyaus.com/CoinSpot 💎 I use the Binance exchange for certain altcoins http://cryptocurrencyaus.com/Binance 📈 I use Independent Reserve to sell Bitcoin & Ethereum http://cryptocurrencyaus.com/independent-reserve ✅ My top rated Cryptocurrency Investment Fundamentals course http://cryptocurrencyaus.com/Fundamentals-course 🔐 My hardware wallet is a Nano Ledger S http://cryptocurrencyaus.com/ledger 🔑 I also use the Trezor Hardware Wallet http://cryptocurrencyaus.com/Trezor ✌🏼 Social Media Twitter https://twitter.com/Cryptos_Aus 📑 Sources; https://www.stateofthedapps.com/ https://medium.com/@skirmantas.januskas/10-most-active-ethereum-dapps-for-entertainment-8cde5ad9894d https://dappradar.com/ https://dappinsight.com/list/2 https://etherscan.io/tokens https://www.cryptokitties.co/ https://medium.com/crypto-currently/the-anatomy-of-erc721-e9db77abfc24 https://hackernoon.com/how-to-turn-1-digital-cat-into-150-analogue-cows-bc1ddb91845f https://techcrunch.com/2017/12/03/people-have-spent-over-1m-buying-virtual-cats-on-the-ethereum-blockchain/?ncid=mobilenavtrend https://hackernoon.com/an-overview-of-non-fungible-tokens-5f140c32a70a https://decentraland.org/ https://themerkle.com/ethereums-erc721-can-be-used-to-process-real-estate-sales-on-blockchain/ https://wikileaks.shop/pages/cryptokitties https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md https://www.ubitquity.io/web/index.html https://tokensale.propy.com/ https://eth.town/about 📩 For business enquiries, please contact us at https://cryptocurrencyaus.com/contact/ 📺 Our editors YouTube channel; https://goo.gl/wMq8oB 📜 Disclaimer: This information should not be interpreted as an endorsement of cryptocurrency or any specific provider, service or offering. It is not a recommendation to trade. Cryptocurrencies are speculative, complex and involve significant risks – they are highly volatile and sensitive to secondary activity. Performance is unpredictable and past performance is no guarantee of future performance. Consider your own circumstances, and obtain your own advice, before relying on this information. You should also verify the nature of any product or service (including its legal status and relevant regulatory requirements) and consult the relevant Regulators' websites before making any decision. Cryptocurrency Australia Media, Crypto Accounts, or the author, may have holdings in the cryptocurrencies discussed. Liability limited by a Scheme Approved Under Professional Standards Legislation.Referrals and affiliate links do earn us commissions but they are products or services we personally use and would not endorse if we did not believe in them :)
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: 50769 Shlomi Zeltsinger
Deploying your first LLL contract
 
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In this screencast Daniel Ellison goes through the process of deploying a simple LLL contract to an Ethereum blockchain. The work is done in Linux at a bash command line. These are the links referenced in the screencast: Compiling your first LLL contract: https://youtube.com/tocome Building and installing Ethereum compilers: https://media.consensys.net/installing-ethereum-compilers-61d701e78f6 Testrpc repository: https://github.com/ethereumjs/testrpc Web3.js documentation: http://web3js.readthedocs.io/en/1.0/ Wikipedia ABI definition: https://en.wikipedia.org/wiki/Application_binary_interface Ethereum, Gas, Fuel & Fees by Joseph Chow: https://media.consensys.net/ethereum-gas-fuel-and-fees-3333e17fe1dc Truffle enterprise documentation: http://truffleframework.com/tutorials/building-dapps-for-quorum-private-enterprise-blockchains Following is a complete list of commands executed in the screencast. Command output is included where appropriate. $ lllc --version LLLC, the Lovely Little Language Compiler Version: 0.4.12-develop.2017.5.4+commit.2d89cfaa.Linux.g++ $ wget https://nodejs.org/dist/v6.10.3/node-v6.10.3-linux-x64.tar.xz $ tar xvf node-v6.10.3-linux-x64.tar.xz $ rm node-v6.10.3-linux-x64.tar.xz $ sudo chown -R root.root node-v6.10.3-linux-x64 $ sudo mv node-v6.10.3-linux-x64 /opt/node $ sudo ln -s /opt/node/bin/node /usr/bin/node $ sudo ln -s /opt/node/lib/node_modules/npm/bin/npm-cli.js /usr/bin/npm $ node -v v6.10.3 $ npm -v 3.10.10 $ sudo npm install -g ethereumjs-testrpc $ sudo ln -s /opt/node/lib/node_modules/ethereumjs-testrpc/bin/testrpc /usr/bin/testrpc $ npm install web3 $ testrpc $ node var Web3 = require('web3'); var web3 = new Web3(new Web3.providers.HttpProvider("http://localhost:8545")); var abi = [{"name":"identity","type":"function","constant":true,"payable":false,"inputs":[{"name":"input","type":"uint256"}],"outputs":[{"name":"","type":"uint256"}]}] var Tutorial = web3.eth.contract(abi); var bin = '601f80600c6000396000f30063ac37eebb60e060020a600035041415601e5760043560005260206000f35b'; var account = web3.eth.coinbase; var tut = Tutorial.new({data: bin, from: account, gas: 1000000}); tut.abi [ { name: 'identity', type: 'function', constant: true, payable: false, inputs: [ [Object] ], outputs: [ [Object] ] } ] tut.identity(42) { [String: '42'] s: 1, e: 1, c: [ 42 ] }
Views: 340 ConsenSysMedia
POC - Drupal Ethereum validated paywall
 
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This Video demonstrates how to use Drupal to create a Ethereum based paywall using the Drupal "Ethereum user connector". The used smart Contract is actually not a paywall, as there are no charges but the computational cost required by Ethereum. https://www.drupal.org/project/ethereum Your sound is working. The video is non-verbal ;) Transcript of the setup process: # Install Drupal composer create-project drupal-composer/drupal-project:~8.0 drupal --stability dev --no-interaction mysql -uroot --execute="CREATE DATABASE \`drupalEthereumNews.local\`;" mkdir drupal/config cd drupal/web drush site-install standard --db-url="mysql://root:[email protected]:3306/drupalEthereumNews.local" --account-name="tho" --account-pass="password" --site-name="drupalEthereum.local" --account-mail="[email protected]" --site-mail="[email protected]" --config-dir="../config" --notify="global" # Add some modules and enable them cd .. composer require drupal/restui drupal/admin_toolbar drupal/node_view_permissions drupal/ethereum cd web/ drush en admin_toolbar_tools node_view_permissions ethereum_user_connector restui -y # Add a landing page and a page title → UI # Set up Drupal's private files mkdir ../private_files && chmod 777 ../private_files # Add private file path to settings.php bb sites/default/settings.php # Set up a restricted content type & add some content → UI # Enable Ethereum user Connector drush en ethereum_user_connector -y * Don't forget to review settings by saving the form # Create a view and add it to the front page * Permission by role "Authorized Ethereum User" (and Admin) * Adapt Settings for ** Teaser ** Default # Edit Blocks to Front page * Add the KittenNews view ** Restrict visibility on Page <front> ** Restrict visibility on Role Ethereum Authenticated User * Remove Search * Add login Block to sidebar # Review Permissions per Content Type * Node View Permissions. See: https://www.drupal.org/project/node_view_permissions ** Make Page content type visible for everyone ** Restrict view for KittenNews Content type * Ensure REST Permissions for authenticated users # User registration settings * Can register per email verification # Add fields to user Form and View * Form ** Add Ethereum Address field ** Add Ethereum Status field * View ** Add Ethereum Address field ** Add Ethereum Status field # Register a user You will currently require Metamask Chrome extension, Mist Browser or any other web3 provider engine.
Views: 433 donkeymedia
⛓️ 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: [email protected] 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: [email protected] Ether: 0x854F6C6C00Fc6e197B4f5aC48D1bac4210fE
Views: 8057 Vlad Wulf
Frontend Web Applications On Ethereum 3 - Sending Tokens | Blockchain
 
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The full code for this lesson is located here: https://github.com/what-the-func/func-wallet/tree/frontend-ethereum-part3 In this video we continue working on the Func Wallet example from the previous video. We're now able to view basic wallet information and our Ether and Token balances. The next step is implementing the "Send Tokens" component. 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: 4219 What The Func?
Building Ethereum Dapp using Solidity | Ethereum Dapp Tutorial | Ethereum Developer Course | Edureka
 
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** Ethereum Developer's Certification course: https://www.edureka.co/ethereum-developer-course ** This Edureka's Ethereum video is intended to guide you on building a Dapp on ethereum using solidity. The video also includes a demo which gives a sense of dapp development using supporting tools. Below are the topics covered in this tutorial 1. What is a Dapp ( Decentralized Application ) 2. Building blocks of Dapp 3. Dapp Building Technology Stack 4. Dapp Building Tools 5. Ethereun Dapp Demo : Property Transfer Here is the link to the Blockchain blog series: https://goo.gl/DPoAHR You can also refer this playlist on Blockchain: https://goo.gl/V5iayd Subscribe to our channel to get video updates. Hit the subscribe button above. Facebook: https://www.facebook.com/edurekaIN/ Twitter: https://twitter.com/edurekain LinkedIn: https://www.linkedin.com/company/edureka #Ethereum #Ethereumdevelopertutorial #ethereumexplained #ethereumtraining How it Works? 1. This is a 4 Week Instructor led Online Course, 20 hours of assignment and 20 hours of project work 2. We have a 24x7 One-on-One LIVE Technical Support to help you with any problems you might face or any clarifications you may require during the course. 3. At the end of the training you will be working on a real time project for which we will provide you a Grade and a Verifiable Certificate! - - - - - - - - - - - - - - - - - About the Course Edureka's Ethereum Developer Certification Course provides you with the underlying concepts of the Blockchain technology and complete understanding of Ethereum. You will be learning about the Ethereum Ecosystem, how Smart Contracts are developed using Solidity and frameworks like Web3.js, Truffle & TestRPC to create a plethora of decentralized automated services. After completing our Ethereum Developer Certification Course, you should be able to: Understand the underlying technology of cryptocurrencies and Blockchain Have a complete understanding of Hash Functions and Public/Private key Cryptography Apprehend the Ethereum Ecosystem and how it differs from Bitcoin Develop Smart Contracts using Solidity on RemixIDE Learn how HTML pages and smart contracts communicate with each other. Deploy your private blockchain service using frameworks like web3.js and Truffle ----------------------------------- Who should go for this ethereum developer's course? Anyone having the zeal to learn innovative technologies can take up this course. Especially, students and professionals aspiring to make a career in the Blockchain technology. However, Ethereum Certification Training is best suited for the below mentioned profiles:- Software Developers Full Stack Developers Why you should go for this ethereum developer's course? Ethereum is a decentralized platform that runs smart contracts: applications that run exactly as programmed without any possibility of downtime, censorship, fraud or third-party interference. These apps run on a custom built blockchain, an enormously powerful shared global infrastructure that can move value around and represent the ownership of property. This enables developers to create markets, store registries of debts or promises, move funds in accordance with instructions given long in the past (like a will or a futures contract) and many other things that have not been invented yet, all without a middleman or counterparty risk. Using Ethereum, you can create a contract that will hold a contributor's money until any given date or goal is reached. Depending on the outcome, the funds will either be released to the project owners or safely returned to the contributors. All of this is possible without requiring a centralized arbitrator, clearinghouse or having to trust anyone. You can even use the token you created earlier to keep track of the distribution of rewards. For more information, Please write back to us at [email protected] or call us at IND: 9606058406 / US: 18338555775 (toll free).
Views: 2571 edureka!
Deploy A Smart Contract With Web3 (1.0) | Ep 3
 
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Today we are going to deploy an Ethereum smart contract to a local testnet: - Using web3 for the JSON RPC client - Using Ethereumjs-testrpc for the Ethereum client - Using an interactive nodejs console for easier understanding - Detailed, step-by-step explanations of the process - Using the simple HelloWorld smart contract created at Episode 2 (link to source code below). Source code: https://github.com/jklepatch/eattheblocks/tree/master/episode3 Like this channel? Subscribe here: https://www.youtube.com/channel/UCZM8XQjNOyG2ElPpEUtNasA Links: - Official Website https://eattheblocks.com - Author Website: https://www.julienklepatch.com
Views: 1553 Eat The Blocks
Ethereum Swarm 0.3: The Photoalbum Dapp
 
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This is a demo of the decentralised photoalbum app running on Ethereum Swarm 0.3 Hint: This app also works really well for hosting slides for a presentation. For more videos on Swarm, see bzz:/videos.theswarm.eth on Swarm (https://swarm-gateways.net/bzz:/videos.theswarm.eth)
Views: 167 Aron Privacy
Connect to Ethereum Blockchain with Truffle HD Wallet & Infura
 
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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: [email protected]
Views: 881 Dapp University
Vendor Smart Contract Dapp
 
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First take at creating a Dapp built on top of ethereum for vendors interacting with smart contracts. Contract source code available at https://github.com/joeb000/storefront
Views: 84 Joe Bernitt
Truffle Ethereum Ropsten Metamask Smart Contract Deployment
 
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My Github Account "https://github.com/arunsybex/Solidity/blob/master/truffle.js" Generate API KEY from infura : https://infura.io/ commends are : truffle unbox webpack truffle deploy --network ropsten Video Editor Comments: hi !!! In this session i'll demo truffle + ropsten + Metamask with simple contract deployment. create simple folder and inside the folder run this comment "truffle unbox webpack". it's take 2 or 3 mins. it's completed... now you want to create your contract. i wrote simple contract if want to deploy this contract to ropsten network you need to define network config on "truffle.js" i already wrote in my github "https://github.com/arunsybex/Solidity/blob/master/truffle.js" you just copy and paste it to project. you need to replace your "mnemonic words" and also "https://ropsten.infura.io/Vr1GWcLG0XzcdrZHWMPu" this url api key. now i go to write migration file for my contract deployment. var Tez = artifacts.require("./Tez.sol"); deployer.deploy(Tez); need to add this two lines in migration file. now i going to deploy my contract to ropsten network. use this comment for deploying truffle deploy --network ropsten now our contract successfully deployed to ropsten network that contract address is "0xd3334a217e885a548cc5430279927c67906e3560" now i'm going to verify it on ropsten network. now it's successfully deployed on network. :) if you have any doubt's please comment ... thanks for watching ...
Views: 1172 Error Work's
Embark 3.1 Walkthrough
 
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Iuri Matias walks through the recent Embark 3.1 - Planet Express release. Embark by Status is a fast, simple and powerful framework to help you develop and deploy Decentralized Applications. Get Started at https://embark.status.im/ 00:10 Introduction 00:46 Only compile contract without deploying 01:31 Autostart node based on configuration 02:57 Syntaxes 03:34 Loading screen 05:07 ENS support in EmbarkJs 06:35 Contract Profiler 07:10 Embark graph command 08:23 Customization option for graph 09:03 Specify provider to upload (Swarm/IPFS) 10:46 Specify account to use 13:07 Specify environment to use 14:07 Faster test via plugin 15:26 Complete revamp of test 15:58 Use all contract configuration in test 17:34 Specify contract to test 18:32 Result screen
Views: 458 Status
Proffer Hackathon: HealChain Toshi App - Part 2
 
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Submitted for Blockchain hackathon by proffer.network Healchain is our dapp solution for electronic health records based on hyperledger fabric. We used Toshi, Solidity/ERC20, Web3, HyperLedger Fabric SDK, Vue, Docker & Go. We used both Ethereum & Hyperledger blockchain in this dapp. All in less than 2.5. Thanks to team PaimPozhil, KarthiKeyan, Ilampirai Nambi, Suresh. Source Code : https://github.com/paimpozhil/healchain Video presentation: https://www.youtube.com/watch…
Views: 184 paim pozhil
Medical Blockchain using Ethereum
 
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This is a demo of the javascript cli that I wrote for an Ethereum based medical blockchain for storing and managing patient records and connecting patients to providers.
Proffer Hackathon: Healchain  Health records in BlockChain & more Part 1
 
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Submitted for Blockchain hackathon by proffer.network Healchain is our dapp solution for electronic health records based on hyperledger fabric. We used Toshi, Solidity/ERC20, Web3, HyperLedger Fabric SDK, Vue, Docker & Go. We used both Ethereum & Hyperledger blockchain in this dapp. All in less than 2.5. Thanks to team PaimPozhil, KarthiKeyan, Ilampirai Nambi, Suresh. Source Code : https://github.com/paimpozhil/healchain Video presentation: https://www.youtube.com/watch…
Views: 344 paim pozhil
MyDoctor - Decentralized Medical Records Blockchain DApp Presentation
 
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https://www.linkedin.com/in/mario-bajric/ Mario Bajric, presents his DApp: MyDoctor MyDoctor lets patients hold onto and own their medical records. This DApp utilizes Ethereum smart contracts. the audience included ConsenSys Ventures, Jet Blue Ventures, Green Sands Equity (1.4 billion in investments), blockchain companies and University of Arizona's Computer Science department head Mario graduated the Blockchain Developer program @ studytheblockchain.com Mario's signed certificate of completion is archived at http://studytheblockchain.com/assets/certificates/060618/stbc-mario-bajric-6-6-18.txt
Build Ethereum Smart Contract for Healthcare sector | Part 4
 
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———————————————————— References for this tutorial: https://ethereum.org/ https://solidity.readthedocs.io/en/v0.4.24/ https://remix.ethereum.org ———————————————————— 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: 25 CodeXpert
Create your own Cryptocurrency & ICO Webpage [Part 15] - Gas-System
 
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Get the Full Course with this link: ( 95% Off ) https://www.udemy.com/create-your-own-cryptocurrency-ico-page-with-solidity/?couponCode=FIRST_100 What is an ICO? An Initial Coin Offering (ICO) is a fundraising mechanism in which new projects sell their underlying crypto tokens in exchange for bitcoin or ether. It's similar to an Initial Public Offering (IPO) in which investors purchase shares of a company. But an ICO is much, much easier to create and basically everyone is able to start an ICO. In 2018 ICOs earned in total over 20.000.000.000$. Therefore an ICO is at that moment the most powerful kickstart for your business or App-idea in order to raise money from investors! What do we cover in this course? In short: we will cover everything  you need to know in order to start with your own ICO-project. The course is structured in 3 major lectures: 1. Ethereum, Blockchain and Smart Contracts: In this lecture we will cover all the basic stuff you need in order to start writing your first Smart-Contract. We will learn for example: - What is Ethereum? - What is a Blockchain? -Creating the ERC20 Token from scratch -Creating the ICO-SmartContract -Deploying SmartContracts to the Rinkeby Testnetwork 2. Creating the ICO-Webpage with ReactJS We will set up the ICO LandingPage for your ICO project. This lecture contains: -What is ReactJS -Download & Installation of ReactJS Creating basic Html, CSS & JavaScript Code for the Webpage 3. Combing the ICO-Webpage with the ICO SmartContract We will cover here for example: -What is Web3? -How to compile Solidity code into JSON -Setting up Infura provider -Deployment of Smart-Contracts with Truffle-HD-Wallet-Provider #gassystem #ethereum #bitcoin #ico
Views: 10 Coding Tutorial
Building an Ethereum assisted Decentralized Data Marketplace Breakout
 
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Data has become a valuable digital currency in its own right over the past decade, but despite its utility, it remains consolidated at the hands of a few large organizations. We propose a new protocol layer for creating an open-access data marketplace. The protocol is decentralized, and allows anyone to publish data in the system in return for incentives. We will discuss the hybrid architecture of the protocol, combining Ethereum smart-contracts for managing data access and subscription, alongside an off-chain network for storing and transmitting the data. Finally, we will introduce Catalyst – the first application to make use of a decentralized marketplace of crypto-data. Guy Zyskind CEO and co-founder of Enigma. Prior to Enigma, Guy was a graduate student at MIT researching and teaching blockchain technology. He authored academic papers around cryptocurrencies, including the Enigma white paper and papers such as “Decentralizing Privacy: Using Blockchain to Protect Personal Data”. Guy holds a M.S. from MIT and a B.S. in Electrical Engineering and Computer Science from Tel-Aviv University.
Views: 3156 Ethereum Foundation
Proof of Concept for Blockchain Ethereum and IoT
 
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Proof of Concept based on Blockchain Ethereum and Internet of things. The smart lock allows you to open the door of your room using only your phone(QR Code as a key to open doors) after confirmation the transaction of the payment in the blockchain. also with this system we can control connected things such as lights (turn off/on), locks(open/close) ,forecast weather... using the IoT voice recognition. --------------------------------------------------------------------------------------------------------- Background music Bounce Ball by Twin Musicom is licensed under a Creative Commons Attribution licence (https://creativecommons.org/licenses/...) Source: http://www.twinmusicom.org/song/255/b... Artist: http://www.twinmusicom.org
Views: 657 khaled mhdbi
Smart Contract Deployment to Rinkeby (053)
 
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The subsequent video would not load (thanks YouTube) without rhyme or reason. So here is a link to video number 50: https://s3.amazonaws.com/smart-contract-deployment-video/Smart+Contract+Deployment+with+Infura+(050).mp4 To follow older videos in sequence follow videos below: https://www.youtube.com/watch?v=2iyywu5wP-0&t=233s https://www.youtube.com/watch?v=qqGYtr8EZOQ&t=79s https://www.youtube.com/watch?v=kCV1U2ymxhA&t=8s https://www.youtube.com/watch?v=k6FNwD12RHk&t=81s https://www.youtube.com/watch?v=U2SY9n9cuAY&t=48s https://www.youtube.com/watch?v=RL_KZvYT1ew&t=157s https://www.youtube.com/watch?v=t_a9V3gY8XM&t=298s https://www.youtube.com/watch?v=esB7Vd6TWQ4&t=33s https://www.youtube.com/watch?v=PNu7-rvWObM&t=323s https://www.youtube.com/watch?v=crwJOAVgL6Y&t=29s https://www.youtube.com/watch?v=H5nRIH6TEHY&t=8s https://www.youtube.com/watch?v=pcUeIBHvv3s
Views: 118 R.I.S.E.
Swap, Swear and Swindle  Swarm Incentivisation - Viktor Trón and Dr. Aron Fischer
 
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Swap, Swear and Swindle. Swarm Incentivisation A robust peer-to-peer content storage and retrieval system requires a careful balance between the needs of the service providers and those of the consumers. The Swarm network is uniquely able to address these needs due to the new opportunities ethereum offers in the form of micro payments and smart-contract governed incentive schemes. In this talk we want to introduce the swarm incentive system. It is built around three pillars which we call Swap, Swear and Swindle. The Swap system accounts for bandwidth usage and compensates nodes for serving up content. The dynamics of this system suggest that popular content will automatically become more widely distributed and faster to access. Micropayments are handled by a custom chequebook smart contract and we are actively looking to integrate full payment channels as well. The Swear contracts deal with long term storage, allowing nodes to sell access to their storage capacity while allowing others to reliably store their content on swarm for extended periods of time. Finally, the Swindle contracts constitute a litigation engine to resolve disputes. The properties of Swindle make it a natural candidate to be a state-channel judge contract and we will present our research into off-chain state-channels for proofs-of-custody, recurring payments as well as litigation and conflict resolution. Swarm thus touches upon multiple strands of research currently happening in and around the ethereum ecosystem and unifies them in a coherent narrative that we hope to convey in this talk. Slides https://ethereumfoundation.org/devcon/wp-content/uploads/2016/10/Swap-Swear-and-Swindle-Swarm-Incentivisation.pdf
Views: 970 Ethereum Foundation
Create your own Cryptocurrency & ICO Webpage [Part 9] - Deployment with Injected Web3
 
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Get the Full Course with this link: ( 95% Off ) https://www.udemy.com/create-your-own-cryptocurrency-ico-page-with-solidity/?couponCode=FIRST_100 What is an ICO? An Initial Coin Offering (ICO) is a fundraising mechanism in which new projects sell their underlying crypto tokens in exchange for bitcoin or ether. It's similar to an Initial Public Offering (IPO) in which investors purchase shares of a company. But an ICO is much, much easier to create and basically everyone is able to start an ICO. In 2018 ICOs earned in total over 20.000.000.000$. Therefore an ICO is at that moment the most powerful kickstart for your business or App-idea in order to raise money from investors! What do we cover in this course? In short: we will cover everything  you need to know in order to start with your own ICO-project. The course is structured in 3 major lectures: 1. Ethereum, Blockchain and Smart Contracts: In this lecture we will cover all the basic stuff you need in order to start writing your first Smart-Contract. We will learn for example: - What is Ethereum? - What is a Blockchain? -Creating the ERC20 Token from scratch -Creating the ICO-SmartContract -Deploying SmartContracts to the Rinkeby Testnetwork 2. Creating the ICO-Webpage with ReactJS We will set up the ICO LandingPage for your ICO project. This lecture contains: -What is ReactJS -Download & Installation of ReactJS Creating basic Html, CSS & JavaScript Code for the Webpage 3. Combing the ICO-Webpage with the ICO SmartContract We will cover here for example: -What is Web3? -How to compile Solidity code into JSON -Setting up Infura provider -Deployment of Smart-Contracts with Truffle-HD-Wallet-Provider
Views: 7 Coding Tutorial
Blockchain based application (dApp) demo - Healthcare use case
 
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I would like to show our demonstration in healthcare which give you about a relationship of 3 stakeholders (Patient, Clinic and Insurer) Our assumption here is that Patient, Clinic and Insurer own 100 ETH. First, P would like to buy an insurance package of Insurer I1 with an amount 20 ETH. A smart contract is established and 20 ETH is booked from P. Once P is confirmed, 20 ETH is transferred from smart contract to I1 Then, P leaves a request on our system that she would like to perform a general examination at the clinic C with total estimated price is 8 ETH (P also provides the insurance ID for C). A smart contract is established between P and C. When P visits C, C will check with I1 (basing on the insurance ID which provided by P) to see how much I1 can pay. I1 confirms that I1 only 5.7 ETH / 8 ETH basing on the term/condition of insurance package that P bought. It means P must pay 2.3 ETH / 8 ETH for the general examination. C asks P to deposit 2.3 ETH in advance. Once P agrees, 2.3 ETH is booked from P and start the examination at C. When the examination is completed and C got confirmation from P: - 2.3 ETH will be automatically transferred from smart contract to Clinic - C submits all related documents/ results to IPFS (is a protocol and network designed to create a content-addressable, peer-to-peer method of storing and sharing hypermedia in a distributed file system) - Once I1 checks and confirms docs are fine, 5.7 ETH is transferred from I1 to C1 Documentation: Ethereum platform: https://www.ethereum.org/ IPFS network: https://ipfs.io/ Decentralized Application (dApp): https://blockchainhub.net/decentralized-applications-dapps/ © 2018 by Global Cybersoft (VN) - a Hitachi Consulting company http://www.globalcybersoft.com/en/
Views: 143 Hoang Le

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