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Usage Example: Deploy ERC20 using Remix

Step 1: Prepare the ERC20 Smart Contract Code​

  1. Open Remix.
  2. In the file manager on the left, create a new Solidity file, for example, MyToken.sol.
  3. Write or paste the ERC20 token contract code. Here’s a simple example:
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

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

contract MyToken is ERC20 {
    constructor(uint256 initialSupply) ERC20("MyToken", "MTK") {
        _mint(msg.sender, initialSupply * (10 ** decimals()));
    }
}

Code Explanation​

  1. ERC20 is the standard ERC20 implementation from OpenZeppelin.
  2. The initialSupply parameter in the constructor sets the initial token supply.
  3. ERC20("MyToken", "MTK") is the token name and symbol; feel free to change them as desired.

Step 2: Compile the Contract​

  1. In Remix, switch to the “Solidity Compiler” tab (second icon in the sidebar).
  2. Select a Solidity compiler version that matches the version in your contract (e.g., 0.8.0).
  3. Click Compile MyToken.sol. If there are no errors, the contract will compile successfully.

Step 3: Deploy the Contract​

  1. Once compiled, go to the “Deploy & Run Transactions” tab (third icon in the sidebar).
  2. Select the contract MyToken.
  3. In the initialSupply field, enter the token’s initial supply (e.g., 1000000 for 1 million tokens).
  4. Choose the environment: Injected Web3: connects to your browser wallet (like MetaMask) to deploy to a EXPchain Testnet.
  5. Click Deploy to deploy the contract.

Step 4: Test Your Token​

After deployment, you can find your contract under Deployed Contracts in Remix. You can test functions such as:

  1. balanceOf: Check the token balance of a specific address.
  2. transfer: Transfer tokens from the deployer account to another address.
  3. approve and transferFrom: Allow another address to transfer tokens on your behalf.

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