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Create ERC20 Custom Tokens

Required Prior Knowledge​

Required Prior Knowledge

This guide assumes you are familiar with the concept of tokens in blockchain, Ethereum Request for Comments (ERCs)(also known as Ethereum Improvement Proposals ( EIP)) , NFTs, Smart Contracts and have already tinkered with Solidity.

You should also have basic knowledge on how to create and deploy a smart contract.

About ERC20​

ERC20 is a standard for fungible tokens and is defined in the EIP-20 Token Standard by Ethereum.

With the ERC20 standard, you can create your own tokens and transfer them to the EVM on IOTA Smart Contracts without fees.

Remix

This guide will use the Remix IDE, but you can use this contract with any IDE you are familiar with.

1. Create the Smart Contract​

Create a new Solidity file, for example, ERC20.sol in the contracts folder of your Remix IDE and add this code snippet:

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.7;

import "@openzeppelin/contracts/token/ERC20/ERC20.sol";

contract ExampleERC20Token is ERC20 {
    constructor() ERC20("ExampleERC20Token", "EET") {
        _mint(msg.sender, 1000000 * 10 ** decimals());
    }
}

This imports all functions from the OpenZeppelin ERC20 smart contract and creates a new ERC20 token with your name and Symbol.

OpenZeppelin

OpenZeppelin provides many audited smart contracts and is a good point to start and learn.

Customize Your Token

You can change the token name ExampleERC20Token and the token symbol EET for anything you want.

Deploy a Smart Contract

Deploy a Solidity Smart Contract following our how to Deploy a Smart Contract guide.

2. Add Your Custom Tokens to MetaMask​

Once you have deployed your contract, you can add your new custom token to your Metamask account.

  1. Open Metamask, and click on the transaction that created the contract. From there, you can simply click on View on block explorer to visit the transaction details. Alternatively, you can copy the transaction ID and visit the ShimmerEVM Explorer or ShimmerEVM Testnet Explorer and use the search bar to find transaction.

'View on block explorer

  1. Copy the contract address from the transaction details, and import your custom ERC20 tokens into MetaMask.

Copy contract address

3. Have some Fun​

Now you should see your token in MetaMask. You can send them to your friends without any fees or gas costs.

Copy contract address

You also can ask in the Discord Chat Server to send them around and discover what the community is building on IOTA Smart Contracts.