Metamask: How can I send a custom token with web3? [duplicate]

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Sending Custom Tokens with Web3: A Step-by-Step Guide

As a developer working with Web3, you’re likely familiar with the basics of interacting with smart contracts and decentralized applications (dApps). However, one important aspect that’s often overlooked is sending custom tokens to users. In this article, we’ll cover how to send a custom token using web3.js and demonstrate a simple example.

What is Web3?

Before diving into the code, let’s quickly review what Web3 is about. Web3 refers to the broader ecosystem of blockchain technologies that enable decentralized applications (dApps). These include cryptocurrencies like Ethereum, ERC-20 tokens, and more. In this article, we’ll focus on sending a custom token using web3.js.

Custom Token Basics

A custom token is a type of cryptocurrency or digital asset created by an individual or organization. The token’s value, supply, and use cases are unique to its creators.

Sending Custom Tokens with Web3: A Step-by-Step Guide

Here’s a step-by-step guide on how to send a custom token using web3.js:

Step 1: Install the Required Packages

First, make sure you have web3 installed in your project. You can install it via npm or yarn:

npm install web3

Or, use yarn:

yarn add web3

Step 2: Set Your Web3 Provider

In this example, we’ll be using the Infura provider for our Ethereum network. You can sign up for a free account on [Infura]( and replace with your project's Infura provider URL.





Step 3: Create a Custom Token

Create a new file, e.g.,customToken.js, and define the custom token object:




const Web3 = require('web3');

const web3 = new Web3(new Web3.providers.HttpProvider('


// Create a custom token with a unique symbol, address, and balance

const CustomToken = {

  symbol: 'MY_TOKEN',

  address: '0xYourTokenAddress',

  balance: web3.eth.getBalance('0xYourTokenAddress'),

};


module.exports = CustomToken;

In this example, we create a custom token with a unique symbol (MY_TOKEN), an associated address (0xYourTokenAddress), and an initial balance.





Step 4: Send the Custom Token

Now, let's send the custom token to another user:


// Get the recipient's Ethereum address from your wallet or a third-party service

const recipientAddress = '0xRecipientAddress';


// Define the amount of tokens you want to transfer (in wei)

const amount = web3.utils.toWei(amountPurchase, 'ether');


// Call thetransfermethod on the token object

CustomToken.transfer(recipientAddress, amount);


// If this is an error message, print it out

console.error('Error sending custom token:', CustomToken);

In this example, we call the transfermethod on our custom token object to send a specified amount of tokens to another user with the address0xRecipientAddress. TheamountPurchasevariable represents the amount of tokens you want to transfer.



Example Use Case:

Suppose you have created a custom token called "Ethereum" and you want to receive 10 units of it. You can follow these steps:

Create a new file, e.g.,ethereum.js, and define your Ethereum address:




const Web3 = require('web3');

const web3 = new Web3(new Web3.providers.HttpProvider('


module.exports = 'YOUR_ETHEREUM_ADDRESS';




Send the custom token to another user with your Ethereum address: