ERC-20 with OpenZeppelin

The ERC-20 standard is deceptively simple — transfers, approvals, allowances. But getting it right (no reentrancy, correct event emission, zero-address checks, overflow protection) is where tokens get hacked. OpenZeppelin Contracts is the most-audited codebase in DeFi. Use it.

solidity
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.24;

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

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

• transfer, transferFrom, approve, allowance, balanceOf, totalSupply, name, symbol, decimals
• The Transfer and Approval events
• Safe internal hooks (_mint, _burn, _update)
• SafeMath is *implicit* in 0.8+ — arithmetic reverts on overflow.

• ERC20Burnable — adds public burn
• ERC20Pausable — emergency pause
• ERC20Permit — gasless approvals (EIP-2612)
• ERC20Capped — hard supply cap

Write KraftyToken with 1,000,000 initial supply minted to the deployer, symbol KFT, inheriting from OpenZeppelin's ERC20.