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0x7Af9AC1fDb60caf6510Af1944f8B4b21F0FE9244
 

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206794732024-09-04 20:01:3514 days ago1725480095  Contract Creation0 ETH
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Similar Match Source Code
This contract matches the deployed Bytecode of the Source Code for Contract 0x36C62025...e6cD474B8
The constructor portion of the code might be different and could alter the actual behaviour of the contract

Contract Name:
TokenLogic

Compiler Version
v0.8.20+commit.a1b79de6

Optimization Enabled:
Yes with 200 runs

Other Settings:
paris EvmVersion
File 1 of 8 : TokenLogic.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

/*    
┌─────────────────────────────────────────────────────────────────────────┐
│                                                                         │
│       _______         ______                      _                     │
│      |__   __|       |  ____|                    (_)                    │
│         | | __ ___  _| |__ __ _ _ __ _ __ ___     _ _ __   __ _         │
│         | |/ _` \ \/ /  __/ _` | '__| '_ ` _ \   | | '_ \ / _` |        │
│         | | (_| |>  <| | | (_| | |  | | | | | |  | | | | | (_| |        │
│         |_|\__,_/_/\_\_|  \__,_|_|  |_| |_| |_|(_)_|_| |_|\__, |        │
│                                                            __/ |        │
│                                                           |___/         │
│                                                                         │
│                               taxfarm.ing                               │
│                                                                         │
└─────────────────────────────────────────────────────────────────────────┘
*/

// utils
import {ERC20Logic} from "./utils/ERC20Logic.sol";
import {IUniswapV2Router02} from "./utils/IUniswapV2Router02.sol";
import {IUniswapV2Factory} from "./utils/IUniswapV2Factory.sol";
import {IUniswapV2Pair} from "./utils/IUniswapV2Pair.sol";
import {IWETH} from "./utils/IWETH.sol";

interface ITokenLogic {
    function initialize(address _deployer, string memory _name, string memory _symbol) external payable;
    function launchTimestamp() external view returns(uint);
    function deployer() external view returns(address payable);
}

// token logic (code used by token proxies contracts)
contract TokenLogic is ERC20Logic, ITokenLogic {
    enum FeesTier {
        HIGH_FEES, // 20/20 fees the first 5 minutes
        MEDIUM_FEES, // 5/5 fees until contract has less than 1% of the supply to sell
        LOW_FEES // 1/1 then
    }

    // - token logic constants (not colliding proxies storages)

    uint private constant HIGH_FEES_DURATION = 300; // duration of the high fees stage (20% during 5 minutes)
    uint private constant LIMITS_DURATION = 300; // duration of max tx and max wallet limits in seconds
    uint private constant BASE_TOTAL_SUPPLY = 1_000_000_000 * 10**18;
    uint public constant MAX_TX_AMOUNT = (1 * BASE_TOTAL_SUPPLY) / 100; // max tx 10M (1%)
    uint public constant MAX_WALLET_AMOUNT = (3 * BASE_TOTAL_SUPPLY) / 100; // max wallet 30M (3%)
    uint private constant LIQUIDITY_AMOUNT = (80 * BASE_TOTAL_SUPPLY) / 100; // uniswap liquidity (80%)

    address public immutable tokenFactory;
    address public immutable WETH;

    IUniswapV2Factory public immutable uniswapFactory;
    IUniswapV2Router02 constant uniswapRouter = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);

    // - instance token storage (stored in each token proxies)

    bool _swapping;

    uint public launchTimestamp; // token launch timestamp

    address payable public deployer;
    address public uniswapPair;

    FeesTier public feesTier; // current token fees tier (could be outdated and updated during the transaction)

    constructor (address _tokenFactory) {
        tokenFactory = _tokenFactory;

        uniswapFactory = IUniswapV2Factory(uniswapRouter.factory());
        WETH = uniswapRouter.WETH();
    }

    modifier lockSwap {
        _swapping = true;
        _;
        _swapping = false;
    }

    // initialize new token datas (called from the factory to the token proxy delegating the call here)
    function initialize(address _deployer, string memory _name, string memory _symbol) external payable {
        require(msg.sender == tokenFactory, "Unauthorized"); // initialized only on the same deployment transaction from token factory
        require(msg.value == 1 ether, "Wrong initial liquidity");

        name = _name;
        symbol = _symbol;
        deployer = payable(_deployer);

        launchTimestamp = block.timestamp;

        _mint(address(this), BASE_TOTAL_SUPPLY - LIQUIDITY_AMOUNT); // mint clogged amount to the contract

        uniswapPair = uniswapFactory.createPair(address(this), WETH);
        _mint(uniswapPair, LIQUIDITY_AMOUNT); // mint liquidity amount to the pair

        IWETH(WETH).deposit{value: 1 ether}();
        assert(IWETH(WETH).transfer(uniswapPair, 1 ether)); // transfer weth to the pair
        IUniswapV2Pair(uniswapPair).mint(tokenFactory); // call low level mint function on pair
    }

    function _transfer(address sender, address recipient, uint256 amount) internal override {
        if (_swapping) return super._transfer(sender, recipient, amount);

        uint fees = _takeFees(sender, recipient, amount);
        if (fees != 0) {
            super._transfer(sender, address(this), fees);
            amount -= fees;
        }

        if (recipient == uniswapPair) _swapFees(amount);

        super._transfer(sender, recipient, amount);

        _forwardFees();
    }

    // return fees amount taken from the transfer (and check for tx and wallet limits)
    function _takeFees(address sender, address recipient, uint amount) private returns (uint) {
        if ((sender != uniswapPair && recipient != uniswapPair) || recipient == tokenFactory || sender == address(this) || recipient == address(uniswapRouter)) return 0;

        // ensure max tx and max wallet
        if (limitsActive() && sender == uniswapPair) {
            require(amount <= MAX_TX_AMOUNT, "Max tx amount reached");
            require(balanceOf(recipient) + amount <= MAX_WALLET_AMOUNT, "Max wallet amount reached");
        }

        // if token has low fees tier, fees are immutable at 1% 
        if (feesTier == FeesTier.LOW_FEES) return amount / 100; // 1% fees

        // else, if token has medium fees, check if we can change tier and return correct fees
        else if (feesTier == FeesTier.MEDIUM_FEES) {
            if (balanceOf(address(this)) <= totalSupply / 100) {
                feesTier = FeesTier.LOW_FEES;
                return amount / 100; // 1% fees
            }
            return amount / 20; // 5% fees
        }

        // else, token is at high fees tier and we check if we can change tier and return correct fees
        else {
            if (block.timestamp - launchTimestamp > HIGH_FEES_DURATION) {
                feesTier = FeesTier.MEDIUM_FEES;
                return amount / 20; // 5% fees
            }
            return amount / 5; // 20% fees
        }
    }

    // swap some fees tokens to eth
    function _swapFees(uint maxAmount) private lockSwap {
        uint tokenAmount = min(min(maxAmount, balanceOf(address(this))), totalSupply / 100);
        if (tokenAmount < 1e18) return; // prevent too small swaps

        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = WETH;

        _approve(address(this), address(uniswapRouter), tokenAmount);
        uniswapRouter.swapExactTokensForETHSupportingFeeOnTransferTokens(
            tokenAmount,
            0,
            path,
            address(this),
            block.timestamp
        );
    }   

    // return true if max wallet and max tx limitations are still active
    function limitsActive() public view returns (bool) {
        return block.timestamp - launchTimestamp <= LIMITS_DURATION;
    }
    
    // forward contract fees to token factory (also try to burn liquidity)
    function _forwardFees() private {
        uint balance = address(this).balance;

        if (balance == 0) return;

        (bool result, ) = tokenFactory.call{value: balance}("");
        require(result, "Failed to forward fees");
    }

    function min(uint a, uint b) private pure returns (uint) {
        return a < b ? a : b;
    }

    receive() external payable {}
}

File 2 of 8 : Context.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}

File 3 of 8 : ERC20Logic.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

import {IERC20} from "./IERC20.sol";
import {Context} from "./Context.sol";

interface IERC20Metadata is IERC20 {
    function name() external view returns (string memory);
    function symbol() external view returns (string memory);
    function decimals() external view returns (uint8);
}

// contract implementing the logic of ERC20 standard (thus usable from proxies)
contract ERC20Logic is Context, IERC20, IERC20Metadata {
    mapping(address => uint256) private _balances;
    mapping(address => mapping(address => uint256)) private _allowances;

    uint256 public totalSupply;

    string public name;
    string public symbol;

    function decimals() public view virtual override returns (uint8) {
        return 18;
    }

    function balanceOf(address account) public view virtual override returns (uint256) {
        return _balances[account];
    }

    function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

    function allowance(address owner, address spender) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }

    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }

    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) public virtual override returns (bool) {
        _transfer(sender, recipient, amount);

        uint256 currentAllowance = _allowances[sender][_msgSender()];
        require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
        unchecked {
            _approve(sender, _msgSender(), currentAllowance - amount);
        }

        return true;
    }

    function burn(uint256 value) public virtual {
        _burn(_msgSender(), value);
    }

    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
        return true;
    }

    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
        uint256 currentAllowance = _allowances[_msgSender()][spender];
        require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
        unchecked {
            _approve(_msgSender(), spender, currentAllowance - subtractedValue);
        }

        return true;
    }

    function _transfer(
        address sender,
        address recipient,
        uint256 amount
    ) internal virtual {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");

        uint256 senderBalance = _balances[sender];
        require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
        unchecked {
            _balances[sender] = senderBalance - amount;
        }
        _balances[recipient] += amount;

        emit Transfer(sender, recipient, amount);
    }

    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");

        totalSupply += amount;
        _balances[account] += amount;
        emit Transfer(address(0), account, amount);
    }

    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");

        uint256 accountBalance = _balances[account];
        require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
        unchecked {
            _balances[account] = accountBalance - amount;
        }
        totalSupply -= amount;

        emit Transfer(account, address(0), amount);
    }

    function _approve(
        address owner,
        address spender,
        uint256 amount
    ) internal virtual {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");

        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }
}

File 4 of 8 : IERC20.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

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);
    function burn(uint256 value) external;

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

File 5 of 8 : IUniswapV2Factory.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

interface IUniswapV2Factory {
    function getPair(address tokenA, address tokenB) external view returns (address pair);
    function createPair(address tokenA, address tokenB) external returns (address pair);
}

File 6 of 8 : IUniswapV2Pair.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

interface IUniswapV2Pair {
    function mint(address to) external returns (uint liquidity);
}

File 7 of 8 : IUniswapV2Router02.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

interface IUniswapV2Router02 {
    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;

    function factory() external pure returns (address);

    function WETH() external pure returns (address);
    
    function addLiquidityETH(
        address token,
        uint amountTokenDesired,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external payable returns (uint amountToken, uint amountETH, uint liquidity);

    function removeLiquidityETH(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external returns (uint amountToken, uint amountETH);
}

File 8 of 8 : IWETH.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

interface IWETH {
    function deposit() external payable;
    function transfer(address to, uint value) external returns (bool);
    function withdraw(uint) external;
}

Settings
{
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "evmVersion": "paris",
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

Contract Security Audit

Contract ABI

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payable","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"feesTier","outputs":[{"internalType":"enum TokenLogic.FeesTier","name":"","type":"uint8"}],"stateMutability":"view","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":[{"internalType":"address","name":"_deployer","type":"address"},{"internalType":"string","name":"_name","type":"string"},{"internalType":"string","name":"_symbol","type":"string"}],"name":"initialize","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"launchTimestamp","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"limitsActive","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","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":"tokenFactory","outputs":[{"internalType":"address","name":"","type":"address"}],"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"},{"inputs":[],"name":"uniswapFactory","outputs":[{"internalType":"contract IUniswapV2Factory","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"uniswapPair","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"stateMutability":"payable","type":"receive"}]

Deployed Bytecode

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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.