// SPDX-License-Identifier: Unlicense
pragma solidity 0.8.10;

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

contract MockNoInfiniteAllowanceERC20 is ERC20 {
    constructor(
        string memory name,
        string memory symbol,
        uint256 initialSupply
    ) ERC20(name, symbol) {
        _mint(_msgSender(), initialSupply);
    }

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

    function _spendAllowance(
        address owner,
        address spender,
        uint256 amount
    ) internal override {
        uint256 currentAllowance = allowance(owner, spender);

        require(currentAllowance >= amount, "ERC20: insufficient allowance");
        unchecked {
            _approve(owner, spender, currentAllowance - amount);
        }
    }
}