How to Listen to Account Changes in a Solana program?

Question

For Example there is a change in a account in a program how do i listen to that changes to do something. I tried using webhooks but they listen to transaction's and the account involved in that tx does not gets updated as fast as the webhook get's triggered

Answer 1

There is accountSubscribe websocket method to subscribe for changes in a specific account.You can use the @solana/web3.js library which hides the implementation details of the websocket method.

Here is a snippet on how you can achieve this:

import { Connection } from "@solana/web3.js"

// Create a connection
const connection = new Connection(<URL>);

// Subscribe to account changes
const id = connection.onAccountChange(<PUBKEY>, (accountInfo) => {
  // Handle account change...
});

// Don't forget to unsubscribe when you no longer use it
connection.removeAccountChangeListener(id);