How to convert decimal numbers to hexadecimals strings using web3.js and ethers.js

const Web3 = require("web3");

function decimalToHexadecimal(decimalNumber) {
  return Web3.utils.toHex(decimalNumber);
}

// Run the function and log the result
const decimalNumber = 255;
const hexadecimalNumber = decimalToHexadecimal(decimalNumber);
console.log(
  `The hexadecimal representation of ${decimalNumber} is ${hexadecimalNumber}`
);

The hexadecimal representation of 255 is 0xff

Overview

Environment setup

Function to convert decimal to hex

The web3.js library uses the utils.toHex() function to take care of this operation, while ethers V6 uses the toBeHex() function.

The scripts show how to use those functions and log the result.

return Web3.utils.toHex(decimalNumber);

Run the script

const Web3 = require("web3");

function decimalToHexadecimal(decimalNumber) {
  return Web3.utils.toHex(decimalNumber);
}

// Run the function and log the result
const decimalNumber = 255;
const hexadecimalNumber = decimalToHexadecimal(decimalNumber);
console.log(
  `The hexadecimal representation of ${decimalNumber} is ${hexadecimalNumber}`
);

The hexadecimal representation of 255 is 0xff

How to encode callData parameters to programmatically interact with a smart contract Send batch requests using ethers.js

const Web3 = require("web3");

function decimalToHexadecimal(decimalNumber) {
  return Web3.utils.toHex(decimalNumber);
}

// Run the function and log the result
const decimalNumber = 255;
const hexadecimalNumber = decimalToHexadecimal(decimalNumber);
console.log(
  `The hexadecimal representation of ${decimalNumber} is ${hexadecimalNumber}`
);

The hexadecimal representation of 255 is 0xff