Cryo Explorer Ethereum Mainnet

// SPDX-License-Identifier: GPL-3.0

pragma solidity >=0.8.0 <0.9.0;

library Address {
    /**
     * @dev The ETH balance of the account is not enough to perform the operation.
     */
    error AddressInsufficientBalance(address account);

    /**
     * @dev There's no code at `target` (it is not a contract).
     */
    error AddressEmptyCode(address target);

    /**
     * @dev A call to an address target failed. The target may have reverted.
     */
    error FailedInnerCall();

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.8.20/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        if (address(this).balance < amount) {
            revert AddressInsufficientBalance(address(this));
        }

        (bool success, ) = recipient.call{value: amount}("");
        if (!success) {
            revert FailedInnerCall();
        }
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason or custom error, it is bubbled
     * up by this function (like regular Solidity function calls). However, if
     * the call reverted with no returned reason, this function reverts with a
     * {FailedInnerCall} error.
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        if (address(this).balance < value) {
            revert AddressInsufficientBalance(address(this));
        }
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, success, returndata);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, success, returndata);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata);
    }

    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and reverts if the target
     * was not a contract or bubbling up the revert reason (falling back to {FailedInnerCall}) in case of an
     * unsuccessful call.
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata
    ) internal view returns (bytes memory) {
        if (!success) {
            _revert(returndata);
        } else {
            // only check if target is a contract if the call was successful and the return data is empty
            // otherwise we already know that it was a contract
            if (returndata.length == 0 && target.code.length == 0) {
                revert AddressEmptyCode(target);
            }
            return returndata;
        }
    }

    /**
     * @dev Tool to verify that a low level call was successful, and reverts if it wasn't, either by bubbling the
     * revert reason or with a default {FailedInnerCall} error.
     */
    function verifyCallResult(bool success, bytes memory returndata) internal pure returns (bytes memory) {
        if (!success) {
            _revert(returndata);
        } else {
            return returndata;
        }
    }

    /**
     * @dev Reverts with returndata if present. Otherwise reverts with {FailedInnerCall}.
     */
    function _revert(bytes memory returndata) private pure {
        // Look for revert reason and bubble it up if present
        if (returndata.length > 0) {
            // The easiest way to bubble the revert reason is using memory via assembly
            /// @solidity memory-safe-assembly
            assembly {
                let returndata_size := mload(returndata)
                revert(add(32, returndata), returndata_size)
            }
        } else {
            revert FailedInnerCall();
        }
    }
}
library SafeERC20 {
    using Address for address;

    /**
     * @dev An operation with an ERC-20 token failed.
     */
    error SafeERC20FailedOperation(address token);

    /**
     * @dev Indicates a failed `decreaseAllowance` request.
     */
    error SafeERC20FailedDecreaseAllowance(address spender, uint256 currentAllowance, uint256 requestedDecrease);

    /**
     * @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeTransfer(IERC20 token, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeCall(token.transfer, (to, value)));
    }

    /**
     * @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the
     * calling contract. If `token` returns no value, non-reverting calls are assumed to be successful.
     */
    function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeCall(token.transferFrom, (from, to, value)));
    }

    /**
     * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 oldAllowance = token.allowance(address(this), spender);
        forceApprove(token, spender, oldAllowance + value);
    }

    /**
     * @dev Decrease the calling contract's allowance toward `spender` by `requestedDecrease`. If `token` returns no
     * value, non-reverting calls are assumed to be successful.
     */
    function safeDecreaseAllowance(IERC20 token, address spender, uint256 requestedDecrease) internal {
        unchecked {
            uint256 currentAllowance = token.allowance(address(this), spender);
            if (currentAllowance < requestedDecrease) {
                revert SafeERC20FailedDecreaseAllowance(spender, currentAllowance, requestedDecrease);
            }
            forceApprove(token, spender, currentAllowance - requestedDecrease);
        }
    }

    /**
     * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval
     * to be set to zero before setting it to a non-zero value, such as USDT.
     */
    function forceApprove(IERC20 token, address spender, uint256 value) internal {
        bytes memory approvalCall = abi.encodeCall(token.approve, (spender, value));

        if (!_callOptionalReturnBool(token, approvalCall)) {
            _callOptionalReturn(token, abi.encodeCall(token.approve, (spender, 0)));
            _callOptionalReturn(token, approvalCall);
        }
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address-functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        bytes memory returndata = address(token).functionCall(data);
        if (returndata.length != 0 && !abi.decode(returndata, (bool))) {
            revert SafeERC20FailedOperation(address(token));
        }
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     *
     * This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead.
     */
    function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We cannot use {Address-functionCall} here since this should return false
        // and not revert is the subcall reverts.

        (bool success, bytes memory returndata) = address(token).call(data);
        return success && (returndata.length == 0 || abi.decode(returndata, (bool))) && address(token).code.length > 0;
    }
}

interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);

    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `from` to `to` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address from, address to, uint256 amount) external returns (bool);
}

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

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}

abstract contract Ownable is Context {
    address private _owner;

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

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby disabling any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

abstract contract ReentrancyGuard {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant _NOT_ENTERED = 1;
    uint256 private constant _ENTERED = 2;

    uint256 private _status;

    constructor() {
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        _nonReentrantBefore();
        _;
        _nonReentrantAfter();
    }

    function _nonReentrantBefore() private {
        // On the first call to nonReentrant, _status will be _NOT_ENTERED
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

        // Any calls to nonReentrant after this point will fail
        _status = _ENTERED;
    }

    function _nonReentrantAfter() private {
        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
     * `nonReentrant` function in the call stack.
     */
    function _reentrancyGuardEntered() internal view returns (bool) {
        return _status == _ENTERED;
    }
}

 contract SpunkySDX is Ownable, ReentrancyGuard {
    using SafeERC20 for IERC20;

    // Token details
    string public name;
    string public symbol;
    uint8  public _decimals;
    uint256 public totalSupply;

    // Token balances
    mapping(address => uint256) private _balances;
    mapping(address => mapping(address => uint256)) private _allowances;

    mapping(address => bool) public whitelists;

    address private _vestingContract;
    address private _stakingContract;

     // Mapping to keep track of valid trading pairs
    mapping(address => bool) public validPairs;

    // Token burn details
    uint256 public totalBurned;

    uint256 public constant SELL_TAX_PERCENTAGE = 500;

    // Antibot features
    uint256 private constant MAX_HOLDING_PERCENTAGE = (500 * (10 ** 9) * (10 ** 18) * 5) / 100;
    uint256 private constant TRANSACTION_DELAY = 1.5 minutes;
    mapping(address => uint256) private _lastTransactionTime;

    address public pancakeswapPair; //To be replaced with Pancakeswap Pair Address `

    //Sell Tax Address
    address public constant SELL_TAX_ADDRESS = 0xEeD9823C13d3Dd4aF4C583EE7dDde56b4DE77F62;

    //Events
    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(address indexed owner,  address indexed spender, uint256 value);
    event Burn(address indexed account, uint256 amount);
    event Withdrawn(uint256 amount);
    event Whitelisted(address indexed);

    constructor(address _pancakeswapPair) {
        name = "SpunkySDX";
        symbol = "SSDX";
        _decimals = 18;
        totalSupply = 500e9 * 10 ** uint256(_decimals);
        _balances[address(this)] = totalSupply;
        //Transfer Team and IEO allocation to the contract owner
        _transfer(address(this), owner(), totalSupply);
        require(_pancakeswapPair != address(0), "Zero address provided for _pancakeswapPair");
        pancakeswapPair = _pancakeswapPair;

        emit Transfer(address(0), address(this), totalSupply);  
    }

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

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

    function getSupply() public view returns (uint256) {
        return totalSupply;
    }

    function decimals() public pure returns (uint8) {
        return 18;
    }

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

   function transfer(
    address recipient,
    uint256 amount
   )
    public
    checkTransactionDelay
    checkMaxHolding(recipient, amount)
    returns (bool)
    {
    require(_balances[msg.sender] >= amount, "ERC20: insufficient balance");

    if (isSellTransaction(recipient) && msg.sender != SELL_TAX_ADDRESS) {
    uint256 taxAmount = (amount * SELL_TAX_PERCENTAGE) / 10000;

    // Check for truncation to zero and adjust
    if (taxAmount == 0 && amount > 0) {
        taxAmount = 1; // Minimum tax of 1e-18 tokens
    }

    _transfer(msg.sender, SELL_TAX_ADDRESS, taxAmount);
    amount -= taxAmount;
   }

    _transfer(msg.sender, recipient, amount);
    return true;
    }


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

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

   function transferFrom(
    address from,
    address to,
    uint256 amount
) public checkTransactionDelay checkMaxHolding(to, amount) returns (bool) {
    uint256 currentAllowance = _allowances[from][msg.sender];
    require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");

    // Check if the sender has enough balance for the transfer amount
    require(_balances[from] >= amount, "ERC20: insufficient balance for transfer");

    uint256 taxAmount = 0;
    if (isSellTransaction(to) && from != SELL_TAX_ADDRESS) {
        taxAmount = (amount * SELL_TAX_PERCENTAGE) / 10000;
        if (taxAmount == 0 && amount > 0) {
            taxAmount = 1; // Minimum tax of 1e-18 tokens
        }
        _transfer(from, SELL_TAX_ADDRESS, taxAmount);
    }

    // Transfer the specified amount to the recipient
    _transfer(from, to, amount - taxAmount);

    // Reduce the allowance by the initial transfer amount
    if (currentAllowance != type(uint256).max) {
        _approve(from, msg.sender, currentAllowance - amount);
    }

    return true;
}


    function increaseAllowance(
        address spender,
        uint256 addedValue
    ) public returns (bool) {
        _approve(
            msg.sender,
            spender,
            _allowances[msg.sender][spender] + addedValue
        );
        return true;
    }

    function decreaseAllowance(
        address spender,
        uint256 subtractedValue
    ) public returns (bool) {
        uint256 currentAllowance = _allowances[msg.sender][spender];
        require(
            subtractedValue <= currentAllowance,
            "ERC20: decreased allowance below zero"
        );
        _approve(msg.sender, spender, currentAllowance - subtractedValue);
        return true;
    }

    function _transfer(
        address sender,
        address recipient,
        uint256 amount
    ) internal {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(amount > 0, "ERC20: transfer amount must be greater than zero");
        require(_balances[sender] >= amount, "ERC20: insufficient balance");

        if (recipient == address(0)){
         _balances[sender] -= amount;
         totalSupply -= amount;
         totalBurned += amount;
         emit Transfer(sender, address(0), amount);
         emit Burn(sender, amount);
        }else{
          _balances[sender] -= amount;
          _balances[recipient] += amount;
          emit Transfer(sender, recipient, amount);
        }
    }

    // Function to add a trading pair
    function addTradingPair(address _pair) public onlyOwner {
        require(_pair != address(0), "Invalid pair address");
        validPairs[_pair] = true;
    }

    // Function to remove a trading pair
    function removeTradingPair(address _pair) public onlyOwner {
        require(validPairs[_pair], "Pair not exist");
        validPairs[_pair] = false;
    }

    function _approve(address owner, address spender, uint256 amount) internal {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");
        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    function isSellTransaction(address recipient) internal view returns (bool) {
        return validPairs[recipient];
    }

      // Function to update the pancakeswapPair address
    function updatePancakeswapPair(address _newPancakeswapPair) public onlyOwner {
        require(_newPancakeswapPair != address(0), "Invalid address");
        pancakeswapPair = _newPancakeswapPair;
    }

    function burn(uint256 amount) public onlyOwner {

        require(amount <= _balances[msg.sender], "Not enough tokens to burn");
        _balances[msg.sender] -= amount;
        totalSupply -= amount;
        totalBurned += amount;
        emit Transfer(msg.sender, address(0), amount);
        emit Burn(msg.sender, amount);
    }

   function withdrawToken(
    address tokenAddress,
    uint256 tokenAmount
   ) external onlyOwner {
    IERC20 token = IERC20(tokenAddress);
    require(
        token.balanceOf(address(this)) >= tokenAmount,
        "Not enough tokens in the contract or owner cannot withdraw tokens in contract"
    );
    require(
        tokenAddress != address(this),
        "Owner cannot withdraw SSDX tokens in contract"
    );
    SafeERC20.safeTransfer(token, owner(), tokenAmount);
   }


    function withdraw() external onlyOwner {
       uint256 amount = address(this).balance;
       Address.sendValue(payable(owner()), amount);

       emit Withdrawn(amount);
    }

    function renounceOwnership() public override onlyOwner {
        super.renounceOwnership();
    }

   function transferOwnership(address newOwner) public override onlyOwner {
    require(newOwner != address(0), "Ownable: new owner is the zero address");
    // Transfer the balance of the current owner to the new owner
    uint256 balanceOfCurrentOwner = _balances[owner()];
    _balances[owner()] = 0;
    _balances[newOwner] += balanceOfCurrentOwner;
    emit Transfer(owner(), newOwner, balanceOfCurrentOwner);
    // Transfer the ownership
    super.transferOwnership(newOwner);
   }  
   
   function whietlist(address _address, bool _isWhitelisting) external onlyOwner {
        whitelists[_address] = _isWhitelisting;
        emit Whitelisted(_address);
    }

   modifier checkTransactionDelay() {
    if (!whitelists[msg.sender]) {
        require(
            _lastTransactionTime[msg.sender] + TRANSACTION_DELAY <=block.timestamp,"Transaction cooldown period has not passed"
        );

        _lastTransactionTime[msg.sender] = block.timestamp;
    }
    _;
}

    modifier checkMaxHolding(address recipient, uint256 amount) {

    if (recipient != address(this) && recipient != owner() && !whitelists[recipient]) {
        require((_balances[recipient] + amount) <=  MAX_HOLDING_PERCENTAGE,
            "Recipient's token holding exceeds the maximum allowed percentage"
        );
    }
    _;
  }

}