Learn about the hexZeroPad utils method

Introduction

The hexZeroPad method is used to pad a hex string with leading zeros so that its length is equal to a specified number of characters.

Usage

This method should be used when you want to pad a hex string with leading zeros so that its length is equal to a specified number of characters. For example, you can use this method to pad the hex string ‘0x1234’ so that its length is equal to 8 characters (or 4 bytes).

Here’s a simple code example to demonstrate how to use this method:

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const { Utils } = require("alchemy-sdk");
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let hexString = '0x1234';
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let zeroPaddedHexString = Utils.hexZeroPad(hexString, 4); // 4 bytes = 8 characters 
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console.log(zeroPaddedHexString); // '0x00001234'