Getting Started

Here is the daigram for how to web3 js work

The web3.js library is a collection of modules which contain specific functionality for the ethereum ecosystem.

• The web3-eth is for the ethereum blockchain and smart contracts

• The web3-shh is for the whisper protocol to communicate p2p and broadcast

• The web3-bzz is for the swarm protocol, the decentralized file storage

• The web3-utils contains useful helper functions for Dapp developers.

  Source:- web3 js

  Starting With Adding web3.js

  First you need to get web3.js into your project. This can be done using the following methods:

  • npm: npm install web3

  Getting Started with Infura's Ethereum API

  • Go to the infura and create account make new project
  • From infura you need project id and urls for web3
  • Infur that api url was connect for the web3 ethereum network
  • Make env file like env.sample with your project id
  • RUN node ethTransactionCrawler.js

  How to Setup Infura

  

Final Result

RESOURCES

1. web3 js
2. Infura
3. Ropsten