web3

web3.js

This is the main package of web3.js, it contains a collection of comprehensive TypeScript libraries for Interaction with the Ethereum JSON RPC API and utility functions.

Features

• Web3.js Plugins](https://docs.web3js.org/guides/web3_plugin_guide/): Enhance or add any functionality by creating scalable web3 plugins for any project.
• Abstractions over the JSON-RPC API: Simplifying interaction for your Developer Experience.
• Language aligned to the official [Ethereum terminology](https://ethereum.org/en/glossary
• Tree-shaking focus: Include only what you need during bundling for optimized performance.
• Dynamic contract types and full API in TypeScript: Enforced with strict types for enhanced security and safety.
• Complete utilities and functionalities for all your Ethereum needs
• More efficient ABI Encoder & Decoder
• Extensive documentation with guides and APIs
• Large collection of test cases
• First-class APIs for interacting with [Smart Contracts](https://ethereum.org/en/glossary#smart-contract
• ESM and CJS module builds: Support for both ECMAScript module and CommonJS module builds for flexible integration with various project setups.
• Contracts dynamic types](https://docs.web3js.org/guides/smart_contracts/infer_contract_types/) & full API in TypeScript
• Using native BigInt instead of large BigNumber libraries: Use native BigInt for improved efficiency compared to using large external BigNumber libraries.
• Custom Output formatters: Format any returned value to be a string, number, BigInt, etc., providing flexibility in handling output data.

Installation

You can install the package either using NPM or using Yarn

Using NPM

npm install web3

Using Yarn

yarn add web3

Getting Started

• :writing_hand: If you have questions submit an issue or join us on Discord

Prerequisites

• :gear: NodeJS (LTS/Fermium)
• :toolbox: Yarn/Lerna

Migration Guide

• Migration Guide from Web3.js 1.x to 4.x Breaking changes are listed in migration guide and its first step for migrating from Web3.js 1.x to 4.x. If there is any question or discussion feel free to ask in discord, and in case of any bug or new feature request open issue or create a pull request for contributions.

Package.json Scripts

Script	Description
clean	Uses rimraf to remove dist/
build	Uses tsc to build package and dependent packages
lint	Uses eslint to lint package
lint:fix	Uses eslint to check and fix any warnings
format	Uses prettier to format the code
test	Uses jest to run unit tests
test:integration	Uses jest to run tests under /test/integration
test:unit	Uses jest to run tests under /test/unit

Web3.js Packages

We encourage users to use only required individual packages listed in following table, for making lightweight application instead of importing main web3 package, and if you don't need functions from most of the packages that are implicitly included with main web3 package.

Package	Version	License	Docs	Description
web3				:rotating_light: Entire Web3.js offering (includes all packages)
web3-core				Core functions for web3.js packages
web3-errors				Errors Objects
web3-eth				Modules to interact with the Ethereum blockchain and smart contracts
web3-eth-abi				Functions for encoding and decoding EVM in/output
web3-eth-accounts				Functions for managing Ethereum accounts and signing
web3-eth-contract				The contract package contained in web3-eth
web3-eth-ens				Functions for interacting with the Ethereum Name Service
web3-eth-iban				Functionality for converting Ethereum addressed to IBAN addressed and vice versa
web3-eth-personal				Module to interact with the Ethereum blockchain accounts stored in the node
web3-net				Functions to interact with an Ethereum node's network properties
web3-providers-http				Web3.js provider for the HTTP protocol
web3-providers-ipc				Web3.js provider for IPC
web3-providers-ws				Web3.js provider for the Websocket protocol
web3-rpc-methods				RPC Methods
web3-types				Shared useable types
web3-utils				Useful utility functions for Dapp developers
web3-validator				Utilities for validating objects