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Essential Eth

A simple, lightweight library for building applications on Ethereum.


Essential Eth was designed from the ground up to be 10x smaller than ethers.js and web3.js. This compact form facilitates quicker setups and optimizes storage.

Supports Decentralization

Choosing Essential Eth means more than using a lean and efficient tool - it supports Ethereum's decentralized tech stack. This library diversifies front-end tools, echoing Ethereum's multi-client approach and mitigating risks tied to ecosystem single library reliance.


The bundle size of essential-eth is less than 5kb for most functions. Smaller bundles mean faster load times, leading to a more responsive and efficient user experience. See for yourself

Tested and Typed

Thanks to Essential Eth's slim codebase, fortified by full TypeScript integration and Jest testing, bugs have nowhere to hide – ensuring a delightful coding experience.

Easy to Try

Essential Eth matches the API of ethers.js as closely as possible. This is also similar to web3.js, so upgrading is a breeze.

Ready for Production

The reliability and stability of Essential Eth are clearly demonstrated by its extensive real-world usage. It is used in production by over 100,000 visitors per month on Earnifi 🚁

GitPOAP - Recognition for Contributions

In partnership with GitPOAP, Essential ETH wants to recognize  all contributors for their contributions toward the growth of this library. Developers can validate their contributions on Github and showcase their GitPOAP as proof-of-work toward their Web3 identity.

Core Features

Welcome to the Essential Eth library! Designed for both seasoned developers and those new to the Ethereum blockchain, Essential Eth provides easy-to-use functions for all your development needs. In the following section, we've outlined some of the most popular features of the library along with simple examples to get you started:

Utils 🔧

The Utils module is your go-to for common Ethereum needs. Whether you're converting between Ether and Wei or validating Ethereum addresses, Utils has you covered. Check out these examples:

etherToWei and weiToEther 💸

These functions allow you to easily convert between the two standard units of ether: Ether and Wei. Much like dollars and cents, Ether is often used for high-level transactions, while Wei is the smallest possible unit of the currency, ideal for precision.

import { etherToWei, weiToEther } from 'essential-eth';

// returns: 1

// returns: '1000000000000000000000'

isAddress ✅

The 'isAddress' function validates Ethereum addresses. It checks whether the input string meets the formatting rules for a valid Ethereum address, which is essential for preventing errors during transactions.

import { isAddress } from 'essential-eth';

// returns: true

// returns: false

toChecksumAddress 🔑

The 'toChecksumAddress' function converts an Ethereum address to a checksum address. Checksum addresses include a mix of capital and lowercase letters, which can help prevent errors due to typos and incorrect input.

import { toChecksumAddress } from 'essential-eth';

// returns: '0xfB6916095ca1df60bB79Ce92cE3Ea74c37c5d359'

View All Utils

Providers 🌐

A provider is a connection to an Ethereum node that allows you to communicate with the network. It serves as an interface between your application and the blockchain. Providers handle the underlying protocol and provide methods to interact with the Ethereum network, such as sending transactions, retrieving account balances, and querying contract data.

JsonRpcProvider 📡

The JsonRpcProvider module provides a straightforward way to interact with Ethereum nodes. Whether you're querying account balances or performing other operations, JsonRpcProvider simplifies the process. Here's an example of how to use it:

import { JsonRpcProvider } from 'essential-eth';

const provider = new JsonRpcProvider();
await provider
.then((balance) => console.log(balance.toString()));
// returns: "28798127851528138"

FallthroughProvider 🔄

The FallthroughProvider is designed for reliability. If one Ethereum node fails to respond, it automatically switches to the next provided URL. This guarantees that your application remains functional, even if individual nodes become unresponsive. Here's an example:

import { FallthroughProvider } from 'essential-eth';

// The FallthroughProvider handles falling through to the next valid URL.
// It's dynamic to never trust one URL again when it fails * until it has tried all other provided URLs
// The default timeout for a request is 8 seconds after which it moves to the next URL
const provider = new FallthroughProvider([
// returns: 39695942769

View Full API