1. what is Web3.js
2. Modules
3. Web3.js with chrome console
4. ABI and bytecode
5. compilation
6. deployment

Prerequisites

• blockchain
• ethereum
• solidity
• js

Software Requirement

• Node js
• Vs code

Web3 js

• web3 js is a collection of libraries that allow you to imteract with local or remote ethereum mode using HTTP,IPC or websocket

remix IDE

Solidity

Ganache

• npm install -g ganache-cli
• ganache-cli --version
• npm install -g ethereumjs-testrpc

for GUI Ganache

• Download image from link
• chmod a+x ganache-2.5.4-linux-x86_64.AppImage
• ./ganache-2.5.4-linux-x86_64.AppImage
• More for Ganache

Truffle Compile contract

• npm install -g truffle on your terminal

• cd to your main dir and RUN:- truffle init

• Compilation of contract on truffle

• make new contract on /contracts test.sol

• and compile contract using : truffle compile

• RUN Ganche

• RUN truffle migrate

• If Contract file was rewrite and change something on sol file than you cant migarte you need truffle migrate --reset

Infura

• for connect with infura you need install this package
• npm install @truffle/hdwallet-provider
• RUN truffle migrate --network repston