AUTHOR:

DESCRIPTION:

Setup

Introduction

Inthisarticle,wearegoingtobuildasimpleCRUDdecentralizedapplicationontheEthereumblockchain.AlsowillcreateaCRUDsmartcontractforthesameapplications.Thisisapracticalhands-onarticle.Detailsprocesshttps://medium.com/geekculture/create-your-first-dapp-on-ethereum-6eb50b4083f2-1.Basicunderstandingofsolidityorgeneralprogramming.-2.Metamaskextensiononchromeorfirefox.(Toconnectwithweb3)-3.BasicunderstandingofWeb3.-4.Walletonmetamaskwithsomeether(coins)foraropstennetwork.-5.Nodejsorjavascriptunderstanding.

Smart Contract Deployment

This is a simple curd smart contract, which deals with students’ data.create copy .env.example to .env fileLet’s deploy the contract in a remix environmentFirst, navigate to address https://remix.ethereum.org/ Add new curd.solfile and copy-paste the code from the repository.From the left side click on the 3rd button deployment window will appear of metamask

Setup Steps

Smart contract deployment on ropsten networkFirst, create an account on https://infura.io get infra keyTesting of a smart contract.The architecture of a decentralized application.Build the decentralized application (dAPP) to interact with the blockchain.Run and test the applicationget abi and contract address from  https://remix.ethereum.org/ Run commands nodejs

Installation

npm install

Run

Step-1 npx ts-node src/index.ts################################### Insert Record  uncomment this linse obj.createStudent('Vinod','MSc');commentobj.readStudent(0);Step- ooutput{  from: '0x8aeaexxxxxxxxxxxxxxxxxxxxxx',  gasUsed: 101374,  logs: [],  logsBloom: '0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',  status: true,  to: '0x83977bf3e9xxxxxxxxxxxxxxxx',  transactionHash: '0x37169068b6606193XXXXXXXXXXXXXXXXXXXXX',    transactionIndex: 25,     type: '0x0'}----------------------------------------------------------Step-2 Reading record npx ts-node src/index.ts################################### To read record  // comment this line in the index file ---->> obj.createStudent('Vinod','MSc'); // uncomment this lin obj.readStudent(0);

License