Adding Custom Logos to Personal Signatures in Web3 Metamask

As a web developer building applications using React, you’re likely familiar with generating personalized signatures for your users. However, one common issue arises when deploying your application to MetaMask on the Ethereum blockchain: the signature message displays an awkward letter “D” at the top of the text.

This problem can be easily solved by adding a custom logo to the beginning of your signature message in Web3 Metamask. In this article, we’ll guide you through the steps to add a personalized logo to your React app’s signatures.

Why do signatures display as “D” and how to fix it

In MetaMask, the default font used for signatures is Arial, which renders an awkward letter “D”. This issue arises because the signature message is being rendered with a fixed width that doesn’t account for varying font sizes. By adding a custom logo, we can create a more visually appealing signature that adapts to different screen resolutions and device types.

Step 1: Create a new React component for your logo

Let’s start by creating a new React component for our logo. We’ll call it Logo.js. In this file, add the following code:

import React from 'react';


const Logo = () => {

  return 
Your Company Name
;

};


export default Logo;

This component will render a simple div element with the company name as its content.

Step 2: Integrate your logo into your signature message

Next, we’ll modify our React app to incorporate the logo into the signature message. We can achieve this by adding a custom Logo.js component that wraps the original signature message and displays the logo at the top of the text.

Let’s update our App.js file:

import React from 'react';

import Logo from './Logo';


function App() {

  const handleSign = () => {

    // Your app logic here...

  };


  return (

    

      
Sign your name





      

      {/*

        Now, let's wrap the original signature message in a custom component that adds the logo

      */}

      

      

    

  );

}


export default App;

Step 3: Create a new SignatureMessage component

To display our signature message with the logo, we’ll create a separate component called SignatureMessage.js. In this file, add the following code:

import React from 'react';


const SignatureMessage = () => {

  return (

    

      
Sign your name

       your original signature message here /}

       your app logic here... /}>Sign

    

  );

};


export default SignatureMessage;

Step 4: Style the logo and signature message

Finally, we can customize the appearance of our logo and signature message by adding some basic styling. Add the following code to Logo.js:

import React from 'react';

import { styled } from 'styled-components';


const LogoContainer = styled.div

  width: 100px;

  text-align: center;

;


const Logo = () => {

  return (

    

      
Your Company Name

    

  );

};


export default Logo;

And add the following code to SignatureMessage.js:

“jsx

import React from 'react';

const SignatureMessageContainer = styled.div

width: 100%;

margin-top: 20px;

`;

const SignatureMessage = () => {

return (

Sign your name