Truffle Ethereum Tutorial- Developing Ethereum DApps with Truffle

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Interested in anything... Tech Enthusiast in Blockchain, Hadoop, Python, Cyber-Security, Ethical Hacking. Interested in anything and everything about Computers. Bookmark 6 / 8 Blog from Ethereum Become a Certified Professional From the previousEthereum blog, we have learnt that Smart-contractcontains a set of rules that govern the Blockchain. And to make working with Ethereumsmart-contracts easy, a development environment called Truffle Suite was built.In this truffle ethereum tutorial, we will look at the following topics:What is Truffle Suite?Features of Truffle EthereumWhat is MetaMask?Installing Truffle and creating a Truffle project on UbuntuInstalling MetaMaskon Google ChromeInstalling TestRPC on UbuntuDemo: Developing a simple DAppwith truffle and MetaMask and making a transactionIf you are interested in becoming an Eth ereum developer, you might want to look into this Ethereum Developer Live Training.What Is Truffle Suite?Truffle Suite is a development environment based on Ethereum Blockchain, used to develop DApps (Distributed Applications). Truffle is a one-stop solution for building DApps: Compiling Contracts, Deploying Contracts, Injecting it into a web app, Creating front-end for DApps and Testing.Truffle Suite Truffle Ethereum TutorialTruffle Suite has three components:Truffle: It is a Development Environment, Testing Framework and Asset pipeline for Ethereum BlokchainsGanache: Ganache is a personal Ethereum Blockchain used to test smart contracts where you can deploy contracts, develop applications, run tests and perform other tasks without any costDrizzle: Drizzle is a collection of libraries used to create easy and better front-end for Ethereum DApps Features OfTruffleEthereumHeres a list of features that makes Truffle a powerful tool to build Ethereum based DApps:Built-in support to Com pile, Deploy and Link smart contractsAutomated Contract testingSupports Console apps as well as Web appsNetwork Management and Package ManagementTruffle console to directly communicate with smart contractsSupports tight integrationWhat Is MetaMask?MetaMask is an easy-to-use browser plugin (for Google-Chrome, Firefox and Brave browser), that provides a graphical user interface to make Ethereum transactions. It allows you to run Ethereum DApps on your browser without running a full Ethereum node on your system. Basically, MetaMask acts as a bridge between Ethereum Blockchain and the browser. MetaMaskis open-source and provides the following exciting features:You can change the code of MetaMask to make it what you want it to beProvides built-in coin purchasingLocal-key Storage Truffle MetaMask Truffle Ethereum TutorialNow, that we know about Truffle and MetaMask, lets get to the hands-on part of how to use these for DApps.Installing Truffle and Creating a Truffle Project on UbuntuIn this section of Truffle Ethereum tutorial, we will see how to install Truffle and how to create a Truffle project.To install Truffle, you will have to run a simple command as below:$ npm install -g truffleNow, lets get to creating a project in Truffle. First, let us create a new directory and get into that directory using the following command:$ mkdirtruffle-pro $ cd truffle-proTo create a project, execute the following command:$ truffle unbox metacoinWhen this command is successfully executed, you will see a project structure present in that directory with minimal files necessary for a project. Thats it! You have created a simple Truffle Ethereum project.Installing MetaMask On Google ChromeIn this section of Truffle Ethereum tutorial, we will look at how to install MetaMask plugin for Google-Chrome browser.Here are the steps to install MetaMask browser plugin:First go to the following link:https://metamask.io/Click on GET CHROME EXTENSION button. This will open a new tabClick on the Add to Chrome button and then Add Extension.Now, on the Top-right corner of your browser, you can see the MetaMaskicon.Accept the Terms and Conditions.And Bam! MetaMask is installed.Now that we have Truffle Ethereum and MetaMask installed in the system, lets see how we can develop a DApp using Truffle Ethereum and make transactions using MetaMask.Installing Test RPC On UbuntuFor this Truffle Ethereum tutorial, we will use TestRPC, which is a Blockchain emulator, to develop our DApp. TestRPC allows you to run a network for testing.It allows you to make calls to the Blockchain without running an actual Ethereum node.To install TestRPC, run the following command:$ npminstall-g ethereumjs-testrpcDemo: Developing A Simple DAppWith Truffle And MetaMask And Making A TransactionOpen a new terminal and run TestRPC with the following command. This will start a test network on your system.$ testrpcYou will see a list of available accounts, private keys for these accounts, a mnemonic phrase, and the port on which TestRPCis listening.Note:Do not use the mnemonic phrase on the main Ethereum Network. Use it only on a private network.Now, lets setup truffle.Open a new terminal and go into the directory where the project was created.To run truffle on our network, we need to edit the truffle.js file. Open this file and make the following entries:module.expor ts = { networks: { development: { host: 'localhost', port: 8545, network_id: '*' //* will match to any network id } } };Save the file and exit.Now, we will have to compile the contract and migrate it to the network. The commands to do this is as follows:$ truffle compile $ truffle migrate You can see that the code was successfully migrated and deployed on the network.Now, open Chrome browser and click on the MetaMaskicon. Click on Import Existing DEN. Enter the mnemonic phrase displayed when you executed the testrpc command, enter the password and click Ok.By default, MetaMask runs on the main network. We dont want to spend money just for a demo, right? For that reason, we have to change network to a private network. In our case, this network is Localhost 8545.We can now see an account with 99+ethersin it. WOW! Free ethers! Well, to disappoint you, these are not real ethers. These are test ethers provided only for testing purpose and has got no real-world value.We need two accounts to make a transaction: a sender and a receiver. So, lets create a new account. To do this, in the MetaMask plugin, click on Switch accounts and then click Create Account. Your new account is created.Now, to sendethersto this account, we need to copy the address of this account.For this Truf fle Ethereum tutorial, we will sendethersfrom Account 1 to Account 2. So, let us switch the account back to Account 1. Here, click on SEND, enter the address to which you want to send the account (the address of Account 2 that I copied) and the number ofethersto be sent and click NEXT.It will show you a summary ofthe transactionand ask for confirmation. Click SUBMIT and the transaction is done.We can see now that there are 50ethersless in Account 1.To verify the transaction, switch to Account 2. Here, there are 50ethersmore. This shows that 50etherswere transferred from Account 1 to Account 2.Congratulations! You have created your first Truffle Ethereum DApp and made a transaction. I hope this truffle ethereum tutorial blog was informative and helped you understanding about Truffle. Now, go ahead and try building new DApps.Got a question for us? Please post it on Edureka Community and we will get back to you.If you wish to learn Blockchain and build a career in Blockchain Technologi es, then check out ourBlockchainCertificationTrainingwhichcomes with instructor-led live training and real-life project experience.This training will help you understand what is Blockchain in an exhaustive manner and help you achieve mastery over the subject.Recommended blogs for you Blockchain Through the Years: History and Recent Applications Read Article Ethereum Tutorial A Deeper Look Into Ethereum! Read Article Hyperledger Fabric A Platform For Business Solutions Read Article Blockchain 2.0: Ethereum DApps and Job Trends Read Article Ethereum Smart Contract How to execute a Smart Contract? Read Article Bitcoin Blockchain Explained : Understanding Bitcoin and Blockchain Read Article What Is Ethereum? A Platform To Decentralize The World Read Article How to write your first Smart Contract? Read Article How to Become a Blockchain Developer? 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