ERC20 smart contract with mint & burn functionality and full Foundry unit tests.
Built with Solidity ^0.8.0 and OpenZeppelin.

File: src/FrogCoin.sol

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

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

contract FrogCoin is ERC20, Ownable {
    constructor() ERC20("FrogCoin", "FROG") {}

    function mint(address to, uint256 amount) public onlyOwner {
        _mint(to, amount);
    }

    function burn(address from, uint256 amount) public onlyOwner {
        _burn(from, amount);
    }
}

• ERC20 standard based on OpenZeppelin
• mint: only owner can mint tokens
• burn: only owner can burn tokens from any address
• Access control via Ownable

File: test/FrogCoin.t.sol

• test_InitialSupplyAndDetails → verifies name, symbol, decimals, totalSupply
• test_Mint_Success → owner can mint tokens
• test_Mint_RevertWhenNotOwner → non-owner cannot mint
• test_Burn_Success → burn tokens successfully
• test_Burn_RevertWhenNotOwner → revert if non-owner tries to burn
• test_Burn_RevertInsufficientBalance → revert if trying to burn too much
• test_Transfer_Success → standard ERC20 transfer works

Make sure you have Foundry installed.

# Initialize project
forge init frog-coin

# Install dependencies
forge install OpenZeppelin/[email protected]

# Run tests
forge test

MIT