Developing dApps with Web3, Solidity and React Training in Dhaka, Bangladesh

This hands-on training is designed to teach developers how to build decentralized applications (dApps) using Ethereum blockchain technologies. Participants will learn smart contract development with Solidity, interact with the blockchain using Web3.js or Ethers.js, and build intuitive frontends with React for seamless dApp experiences.

Smart Contract Development and Web3 Fundamentals

Introduction to Blockchain and Ethereum

  Concepts of decentralization and smart contracts

  Overview of Ethereum virtual machine (EVM)

  Transactions, gas, and the role of miners/validators

Solidity Smart Contract Development

  Solidity basics: data types, functions, modifiers, and events

  Writing contracts for tokens, voting, or to-do apps

  Visibility, state variables, and contract structure

  Using Remix IDE for contract development and testing

Local Development Environment with Hardhat or Truffle

  Installing and configuring Hardhat or Truffle

  Compiling and deploying contracts locally

  Writing unit tests for smart contracts using Mocha and Chai

  Using local Ethereum networks

Interacting with Contracts Using Web3.js or Ethers.js

  Connecting to contracts from JavaScript

  Reading and writing data via transactions

  Listening for smart contract events

  Handling transaction confirmations and errors

Building the Frontend and Integrating the dApp

React Setup for dApp Development

  Bootstrapping a React project with Vite or Create React App

  Folder structure and component planning

  Connecting React with MetaMask via Web3.js or Ethers.js

Wallet Integration and User Onboarding

  Detecting and connecting to MetaMask

  Handling network switching and account changes

  Managing user authentication and session state

Integrating React with Smart Contracts

  Calling contract functions from React components

  Displaying blockchain data in the UI

  Submitting transactions and handling loading states

Listening for Blockchain Events in the UI

  Subscribing to contract events

  Updating UI reactively based on on-chain changes

  Handling pending, success, and failed transactions

Hands-on Exercises

Summary and Conclusion