Metamask: How to show my erc20 coin custom logo everywhere?

Presenting a Custom Logo for ERC-20 Coins: A Step-by-Step Guide

When launching custom tokens on the Polygon (formerly Ethereum) blockchain, one of the most exciting aspects is customizing your token logo. In this article, we’ll look at three easy ways to present a unique logo for everyone to see, and then provide a quick guide on how to change it later.

Method 1: Manually Embedding a Logo

One way to showcase a custom logo is to manually embed it into your project files on the Polygon network. This method involves creating an additional file with the logo image data that can be uploaded to the Ethereum blockchain and then displayed directly in your token contracts.

Prerequisites:

• Create a new Ethereum wallet or use an existing one.

• Set up your Polygon account and create a new token contract using the ERC-20 standard.

• Check out Polygon’s erc20 library, which contains functions for working with tokens on the blockchain.

Step-by-step instructions:

• Create a custom logo file: Create a PNG or JPEG image of your desired logo and save it as “logo.png” in a location accessible to your Ethereum wallet.

• Configure the erc20 library: Import the necessary libraries, including erc20, into your codebase using npm or yarn.

const { Erc20 } = require("erc20");
// Initialize an Erc20 contract instance
const tokenContract = new Erc20();

• Upload Logo File to Blockchain: Use the tokenContract.uploadImage method to upload an image file of your custom logo to the Ethereum blockchain.

// Upload the logo image file to the blockchain
tokenContract.uploadImage("logo.png", (err, data) => {
if (err) {
console.error(err);
} else {
// Log or save the uploaded image data for further processing
console.log(data);
}
});

• Display Logo in Token Contract

  

  : Use a custom function to display the uploaded logo on your token’s blockchain.

// Define a custom function to display the logo
function displayLogo() {
// Get a token instance from the Erc20 library
const token = new Erc20();
// Display the uploaded logo in the token contract
token.displayImage("logo.png", () => {
console.log("Logo displayed!");
});
}

Method 2: Using a Polygon-based blockchain service

Another approach to displaying your own logo is to use a Polygon-based blockchain service such as Polygon Studio or Matic Network. These services provide an easy-to-use interface for creating and managing tokens on the Polygon network.

Prerequisites:

• Install and configure your preferred blockchain development environment (IDE).

• Familiarize yourself with the erc20 library provided by Polygon.

Step-by-step instructions:

• Create a new token contract: Use the MaticTokenFactory SDK to create a new ERC-20 token contract in Matic.

• Configure the erc20 library: Import the necessary libraries, including erc20, into your codebase using npm or yarn.

const { Erc20 } = require("erc20");
// Initialize an Erc20 contract instance
const tokenContract = new Erc20();

• Upload a logo file to Matic: Use the MaticTokenFactory SDK to upload a custom logo image file to Matic.

// Upload the logo image file to Matic
MaticTokenFactory.uploadImage("logo.png", (err, data) => {
if (err) {
console.error(err);
} else {
// Log or save the uploaded image data for further processing
console.log(data);
}
});

• Display logo in token contract: Use a custom function to display the uploaded logo on the token blockchain.

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