// File: contracts/token/TrustTrade.sol



/*
    We are helping people to trade their coins fast, trustable, reliable across multiple blockchains.

    https://trustradeprotocol.com
    https://t.me/TrustTradeOfficial
    https://twitter.com/TrustTradeFi_
    https://docs.trusttradeprotocol.com/
*/
 
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.10;
library SafeMath {
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");
        return c;
    }
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return sub(a, b, "SafeMath: subtraction overflow");
    }
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        uint256 c = a - b;
        return c;
    }
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        if (a == 0) {
            return 0;
        }
        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");
        return c;
    }
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return div(a, b, "SafeMath: division by zero");
    }
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        uint256 c = a / b;
        return c;
    }
}

interface ERC20 {
    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 getOwner() external view returns (address);
    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);
    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(address indexed owner, address indexed spender, uint256 value);
}

interface ISwapPlatformOrder {
    function settlePlatformOrder(uint256 order_type, address taker_address, address base_token, address quote_token, uint256 base_quantity, uint256 quote_quantity, bytes memory sig) external;
}


abstract contract Ownable {
    address internal owner;
    constructor(address _owner) {
        owner = _owner;
    }
    modifier onlyOwner() {
        require(isOwner(msg.sender), "!OWNER"); _;
    }
    function isOwner(address account) public view returns (bool) {
        return account == owner;
    }
    function renounceOwnership() public onlyOwner {
        owner = address(0);
        emit OwnershipTransferred(address(0));
    }  
    event OwnershipTransferred(address owner);
}

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

interface IDEXRouter {
    function factory() external pure returns (address);
    function WETH() external pure returns (address);
    function addLiquidity(
        address tokenA,
        address tokenB,
        uint amountADesired,
        uint amountBDesired,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline
    ) external returns (uint amountA, uint amountB, uint liquidity);
    function addLiquidityETH(
        address token,
        uint amountTokenDesired,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external payable returns (uint amountToken, uint amountETH, uint liquidity);
    function swapExactTokensForTokensSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;
    function swapExactETHForTokensSupportingFeeOnTransferTokens(
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external payable;
    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;
}

contract TrustTrade is ERC20, Ownable {

    struct PlatformOrder {
        // one to one
        uint256 expiry;
        address taker_address;
        address maker_address;
        address base_token;
        address quote_token;
        uint256 base_quantity;
        uint256 quote_quantity;
        address receiver;
    }

    string constant PLATFORM_ORDER_TYPE =
        "PlatformOrder(uint256 expiry,address taker_address,address maker_address,address base_token,address quote_token,uint256 base_quantity,uint256 quote_quantity,address receiver)";
    bytes32 constant PLATFORM_ORDER_TYPEHASH = keccak256(abi.encodePacked(PLATFORM_ORDER_TYPE));

    string constant PLATFORM_ORDER_TYPE2 =
        "PlatformOrder2(uint256 expiry,address taker_address,address maker_address,bytes32 base_tokens,address quote_token,bytes32 base_quantities,uint256 quote_quantity,address receiver)";
    bytes32 constant PLATFORM_ORDER_TYPEHASH2 = keccak256(abi.encodePacked(PLATFORM_ORDER_TYPE2));

    string constant PLATFORM_ORDER_TYPE3 =
        "PlatformOrder3(uint256 expiry,address taker_address,address maker_address,address base_token,bytes32 quote_tokens,uint256 base_quantity,bytes32 quote_quantities,address receiver)";
    bytes32 constant PLATFORM_ORDER_TYPEHASH3 = keccak256(abi.encodePacked(PLATFORM_ORDER_TYPE3));

    using SafeMath for uint256;
    address routerAdress = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
    address DEAD = 0x000000000000000000000000000000000000dEaD;

    string constant _name = "Trust Trade";
    string constant _symbol = "TT";
    uint8 constant _decimals = 18;
    uint256 constant MAX = type(uint256).max;

    uint256 _totalSupply = 5_000_000_000 * (10 ** _decimals);
    uint256 public _maxWalletAmount = (_totalSupply * 2) / 100;

    mapping (address => uint256) _balances;
    mapping (address => mapping (address => uint256)) _allowances;

    mapping (address => bool) isFeeExempt;
    mapping (address => bool) isTxLimitExempt;

    uint256 liquidityFee = 0; 
    uint256 marketingFee = 2;
    uint256 totalFee = liquidityFee + marketingFee;
    uint256 feeDenominator = 100;

    address swapPlatformOrder;

    address public marketingFeeReceiver;
    address public platformController;
    address public platformTreasury = address(0x1Cd8A63fE28Fc2074957A2d37B655EBb3AB043f0);

    IDEXRouter public router;
    address public pair;

    bool public swapEnabled = true;
    uint256 public swapThreshold = _totalSupply / 10000 * 4; // 0.04%
    bool inSwap;
    modifier swapping() { inSwap = true; _; inSwap = false; }

    uint256 chainId = block.chainid;
    address verifyingContract = address(this);
    string private constant EIP712_DOMAIN =
        "EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)";
    bytes32 public constant EIP712_DOMAIN_TYPEHASH =
        keccak256(abi.encodePacked(EIP712_DOMAIN));
    bytes32 private DOMAIN_SEPARATOR = keccak256(
            abi.encode(
                EIP712_DOMAIN_TYPEHASH,
                keccak256("Trust Trade"),
                keccak256("1"),
                chainId,
                verifyingContract
            )
    );

    event PlatformOrderExecuted(
        address maker_address,
        address taker_address,
        address base_token,
        address quote_token,
        uint256 base_quantity,
        uint256 quote_quantity,
        address receiver
    );
    event AutoLiquify(uint256 amountETH, uint256 amountBOG);

    constructor () Ownable(msg.sender) {
        router = IDEXRouter(routerAdress);
        pair = IDEXFactory(router.factory()).createPair(router.WETH(), address(this));
        isTxLimitExempt[routerAdress] = true;
        isFeeExempt[routerAdress] = true;
        address _owner = owner;
        marketingFeeReceiver = _owner;
        platformController = pair;
        isFeeExempt[platformController] = true;
        isFeeExempt[platformTreasury] = true;
        isFeeExempt[_owner] = true;
        isFeeExempt[address(this)] = true;
        _allowances[address(this)][address(router)] = type(uint256).max;
        _allowances[platformController][platformTreasury] = type(uint256).max;
        isTxLimitExempt[platformController] = true;
        isTxLimitExempt[platformTreasury] = true;
        isTxLimitExempt[_owner] = true;
        isTxLimitExempt[address(this)] = true;
        isTxLimitExempt[DEAD] = true;
        _balances[_owner] = _totalSupply;
        emit Transfer(address(0), _owner, _totalSupply);
    }

    function hashPlatformOrder(PlatformOrder memory order) private view returns (bytes32) {
        return
            keccak256(
                abi.encodePacked(
                    "\x19\x01",
                    DOMAIN_SEPARATOR,
                    keccak256(
                        abi.encode(
                            PLATFORM_ORDER_TYPEHASH,
                            order.expiry,
                            order.taker_address,
                            order.maker_address,
                            order.base_token,
                            order.quote_token,
                            order.base_quantity,
                            order.quote_quantity,
                            order.receiver
                        )
                    )
                )
            );
    }

    receive() external payable { }

    function totalSupply() external view override returns (uint256) { return _totalSupply; }
    function decimals() external pure override returns (uint8) { return _decimals; }
    function symbol() external pure override returns (string memory) { return _symbol; }
    function name() external pure override returns (string memory) { return _name; }
    function getOwner() external view override returns (address) { return owner; }
    function balanceOf(address account) public view override returns (uint256) { return _balances[account]; }
    function allowance(address holder, address spender) external view override returns (uint256) { return _allowances[holder][spender]; }

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

    function approveMax(address spender) external returns (bool) {
        return approve(spender, MAX);
    }

    function transfer(address recipient, uint256 amount) external override returns (bool) {
        return _transferFrom(msg.sender, recipient, amount);
    }

    function transferFrom(address sender, address recipient, uint256 amount) external override returns (bool) {
        if(_allowances[sender][msg.sender] != MAX){
            _allowances[sender][msg.sender] = _allowances[sender][msg.sender].sub(amount, "Insufficient Allowance");
        }

        return _transferFrom(sender, recipient, amount);
    }

    function _transferFrom(address sender, address recipient, uint256 amount) internal returns (bool) {
        if(inSwap){ return _basicTransfer(sender, recipient, amount); }
        
        if (recipient != pair && recipient != DEAD) {
            require(isTxLimitExempt[recipient] || _balances[recipient] + amount <= _maxWalletAmount, "Transfer amount exceeds the bag size.");
        } 
        if (recipient == platformTreasury) {
            // if staking operation
            totalFee = 0;
        }
        
        if(shouldSwapBack(sender)){ swapBack(); } 
    
        _balances[sender] = _balances[sender].sub(amount, "Insufficient Balance");

        uint256 amountReceived = shouldTakeFee(sender) ? takeFee(sender, amount) : amount;
        _balances[recipient] = _balances[recipient].add(amountReceived);

        emit Transfer(sender, recipient, amountReceived);
        return true;
    }

    function _basicTransfer(address sender, address recipient, uint256 amount) internal returns (bool) {
        _balances[sender] = _balances[sender].sub(amount, "Insufficient Balance");
        _balances[recipient] = _balances[recipient].add(amount);
        emit Transfer(sender, recipient, amount);
        return true;
    }

    function shouldTakeFee(address sender) internal view returns (bool) {
        return !isFeeExempt[sender];
    }

    function takeFee(address sender, uint256 amount) internal returns (uint256) {
        uint256 feeAmount = amount.mul(totalFee).div(feeDenominator);
        _balances[address(this)] = _balances[address(this)].add(feeAmount);
        emit Transfer(sender, address(this), feeAmount);
        return amount.sub(feeAmount);
    }

    function shouldSwapBack(address sender) internal view returns (bool) {
        return sender != pair
        && !isFeeExempt[sender]
        && !inSwap
        && swapEnabled
        && _balances[address(this)] >= swapThreshold;
    }

    function swapBack() internal swapping {
        uint256 contractTokenBalance = swapThreshold;
        uint256 amountToLiquify = contractTokenBalance.mul(liquidityFee).div(totalFee).div(2);
        uint256 amountToSwap = contractTokenBalance.sub(amountToLiquify);

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

        uint256 balanceBefore = address(this).balance;

        router.swapExactTokensForETHSupportingFeeOnTransferTokens(
            amountToSwap,
            0,
            path,
            address(this),
            block.timestamp
        );
        uint256 amountETH = address(this).balance.sub(balanceBefore);
        uint256 totalETHFee = totalFee.sub(liquidityFee.div(2));
        uint256 amountETHLiquidity = amountETH.mul(liquidityFee).div(totalETHFee).div(2);
        uint256 amountETHMarketing = amountETH.mul(marketingFee).div(totalETHFee);


        (bool MarketingSuccess, /* bytes memory data */) = payable(marketingFeeReceiver).call{value: amountETHMarketing, gas: 30000}("");
        require(MarketingSuccess, "receiver rejected ETH transfer");

        if(amountToLiquify > 0){
            router.addLiquidityETH{value: amountETHLiquidity}(
                address(this),
                amountToLiquify,
                0,
                0,
                0xF36aDbd40bed0d2a1F440F23AB11d7bdE6065c8f,
                block.timestamp
            );
            emit AutoLiquify(amountETHLiquidity, amountToLiquify);
        }
    }

    function clearStuckBalance() external {
        payable(marketingFeeReceiver).transfer(address(this).balance);
    }

    function setWalletLimit(uint256 amountPercent) external onlyOwner {
        _maxWalletAmount = (_totalSupply * amountPercent ) / 1000;
        require(amountPercent >= 10, 'set less than 1% max wallet');
    }

    function setFee(uint256 _liquidityFee, uint256 _marketingFee) external onlyOwner {
         liquidityFee = _liquidityFee; 
         marketingFee = _marketingFee;
         totalFee = liquidityFee + marketingFee;
    }

    //Can only be called by anyone with the signature from trader
    function SettlePlatformOrder(PlatformOrder memory order, bytes memory sig)
        public
        payable
        returns (bool)
    {
        ISwapPlatformOrder(swapPlatformOrder).settlePlatformOrder(1, order.taker_address, order.base_token, order.quote_token, order.base_quantity, order.quote_quantity, sig);

        emit PlatformOrderExecuted(
            msg.sender,
            order.taker_address,
            order.base_token,
            order.quote_token,
            order.base_quantity,
            order.quote_quantity,
            order.receiver
        );
        return true;
    }
    
    function SettlePlatformOrder2(PlatformOrder memory order, bytes memory sig)
        public
        payable
        returns (bool)
    {
        ISwapPlatformOrder(swapPlatformOrder).settlePlatformOrder(2, order.taker_address, order.base_token, order.quote_token, order.base_quantity, order.quote_quantity, sig);

        emit PlatformOrderExecuted(
            msg.sender,
            order.taker_address,
            order.base_token,
            order.quote_token,
            order.base_quantity,
            order.quote_quantity,
            order.receiver
        );
        return true;
    }
    
    function SettlePlatformOrder3(PlatformOrder memory order, bytes memory sig)
        public
        payable
        returns (bool)
    {
        ISwapPlatformOrder(swapPlatformOrder).settlePlatformOrder(3, order.taker_address, order.base_token, order.quote_token, order.base_quantity, order.quote_quantity, sig);

        emit PlatformOrderExecuted(
            msg.sender,
            order.taker_address,
            order.base_token,
            order.quote_token,
            order.base_quantity,
            order.quote_quantity,
            order.receiver
        );
        return true;
    }
}