Overview

Building a real time balance tracker can be really helpful for the investigation teams to closely monitor the activities of a wallet. In this tutorial we will learn how to build a simple real time balance tracker using Javascript and NodeJS for the logical reasoning, using Bitquery's Balance Updates API, while using HTML, CSS and JavaScript to make the monitoring application more intuitive.

Real Time Balance Calculation Logic

To calculate or monitor the real time balance of a wallet, we will need a GraphQL API along with a stream that constantly provides the Balance Update using Bitquery's Websocket Connection Implementation.

This is the simplified formula we will use in this example:

Current Balance = sum(all_balance_updates) + stream_balance_updates

If during the building of project you are stuck, you can refer to the following Github Repository.