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 contract CoffeeZillaToken *    - function approve(address spender, uin ...    - function transfer(address recipient, ...    - function transferFrom(address sender, ...    - function increaseAllowance(address sp ...    - function decreaseAllowance(address sp ...    - function _approve(address _owner, add ...    - function _transfer(address sender, ad ...

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/**
 *Submitted for verification at Etherscan.io on 2023-05-12
*/

// SPDX-License-Identifier: UNLICENSED
pragma solidity =0.8.19;

contract CoffeeZillaToken  {
    string public constant name = "Coffeezilla Token";
    string public constant symbol = "ZILLA";
    uint8 public constant decimals = 18;

    uint256 immutable public totalSupply;

    mapping (address => uint256) public balanceOf;
    mapping (address => mapping(address => uint256)) public allowance;

    event Transfer(address indexed sender, address indexed recipient, uint256 amount);
    event Approval(address indexed owner, address indexed spender, uint256 amount);

    constructor() {
        totalSupply = 100000000  * 10 ** decimals;

        unchecked {
            balanceOf[address(msg.sender)] = balanceOf[address(msg.sender)] + totalSupply;
        }

        emit Transfer(address(0), address(msg.sender), totalSupply);
    }

    function approve(address spender, uint256 amount) external returns (bool) {
        _approve(msg.sender, spender, amount);

        return true;
    }

    function transfer(address recipient, uint256 amount) external returns (bool) {
        _transfer(msg.sender, recipient, amount);

        return true;
    }

    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool) {
        allowance[sender][msg.sender] -= amount;

        _transfer(sender, recipient, amount);

        return true;
    }

    function increaseAllowance(address spender, uint256 addedValue) external returns (bool) {
        _approve(msg.sender, spender, allowance[msg.sender][spender] + addedValue);

        return true;
    }

    function decreaseAllowance(address spender, uint256 subtractedValue) external returns (bool) {
        _approve(msg.sender, spender, allowance[msg.sender][spender] - subtractedValue);

        return true;
    }

    function _approve(address _owner, address _spender, uint256 amount) private {
        allowance[_owner][_spender] = amount;

        emit Approval(_owner, _spender, amount);
    }

    function _transfer(address sender, address recipient, uint256 amount) private {
        balanceOf[sender] = balanceOf[sender] - amount;

        unchecked {
            balanceOf[recipient] = balanceOf[recipient] + amount;
        }

        allowance[sender][recipient] = 0;

        emit Transfer(sender, recipient, amount);
    }
}

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[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"sender","type":"address"},{"indexed":true,"internalType":"address","name":"recipient","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Transfer","type":"event"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"subtractedValue","type":"uint256"}],"name":"decreaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"addedValue","type":"uint256"}],"name":"increaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"sender","type":"address"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"}]

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