JavaScript/TypeScript

Learn more about using JavaScript and TypeScript with Infura.

Ethers provider behaviour when hitting the API Key daily limit

When the daily API Key limit is being hit an API request to Infura should return: “exceeded ...

Ethers.js How to get the ETH & ERC-20 tokens balance of an address at a particular timestamp

Hello Infura community,

Web3.js How to keep Websocket subscriptions alive and reconnect on failures

Smart contracts are an essential part of the Ethereum ecosystem; Smart contracts emit so-cal...

Ethers.js: How to retrieve the balance of an ERC-20 token

Hello everyone,

Web3.js: How to Retrieve the Balance of an ERC-20 Token

Most of the tokens we all know and love deployed on the Ethereum network follow the same spe...

Ethers.js: How to send batch requests with Infura

Hello Infura frens

Web3.js: How to send batch requests with Infura

This tutorial makes use of Web3.js v1.x.x. Not all functionality might work with Web3.js v4.

Axios: How to send an EIP-1559 raw transaction in js

In general the Javascript libraries like Ethers.js or web3.js have build in methods to sign ...

Ethers.js: How to send EIP-1559 transactions

Ethers is pretty cool and is able to send a eip-1559 transaction automatically without a nee...

Ethers.js: How to send ERC-20 Tokens

Hello everyone,

Web3.js: How to Send ERC-20 Tokens

This tutorial makes use of Web3.js v1.x.x. Not all functionality might work with Web3.js v4.

Web3.js How to subscribe to pending transactions using web3.subscribe

This tutorial makes use of Web3.js v1.x.x. Not all functionality might work with Web3.js v4.

Web3.js: How to Track ERC-20 Token Transfers (+ Specific Address/Token)

ERC-20 tokens have become an essential part of the Ethereum ecosystem; if you’ve interacted ...

Web3.js: How to Track NFT (ERC-721/1155) Transfers and Mints (+ Specific Address/NFT)

This tutorial makes use of Web3.js v1.x.x. Not all functionality might work with Web3.js v4.

React.js & Ethers.js: Demo of using the InfuraProvider vs the Metamask wallet Web3Provider

Hello friends! Today we’re going to take a look at how to connect to Ethereum using the ethe...