// File: Address.sol



// SPDX-License-Identifier: MIT

pragma solidity 0.8.4;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

        uint256 size;
        assembly {
            size := extcodesize(account)
        }
        return size > 0;
    }

    /**
     * @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://diligence.consensys.net/posts/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/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(
            address(this).balance >= amount,
            "Address: insufficient balance"
        );

        (bool success, ) = recipient.call{value: amount}("");
        require(
            success,
            "Address: unable to send value, recipient may have reverted"
        );
    }

    /**
     * @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, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * 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.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data)
        internal
        returns (bytes memory)
    {
        return functionCall(target, data, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @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`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value
    ) internal returns (bytes memory) {
        return
            functionCallWithValue(
                target,
                data,
                value,
                "Address: low-level call with value failed"
            );
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(
            address(this).balance >= value,
            "Address: insufficient balance for call"
        );
        require(isContract(target), "Address: call to non-contract");

        (bool success, bytes memory returndata) = target.call{value: value}(
            data
        );
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data)
        internal
        view
        returns (bytes memory)
    {
        return
            functionStaticCall(
                target,
                data,
                "Address: low-level static call failed"
            );
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");

        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data)
        internal
        returns (bytes memory)
    {
        return
            functionDelegateCall(
                target,
                data,
                "Address: low-level delegate call failed"
            );
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");

        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            // 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

                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

// File: DefiSportsMarketplace.sol



//SPDX-License-Identifier: MIT
pragma solidity =0.8.4;

import "./Ownable.sol";
import "./SafeMath.sol";
import "./Address.sol";
import "./IERC20.sol";
import "./INFTContract.sol";


contract DefiSportsMarketplace is Ownable {
using SafeMath for uint256;
using Address for address;

enum EOrderType{
    None,
    Fixed,
    Auction
}

enum EOrderStatus{
    None,
    OpenForTheMarket,
    MarketCancelled,
    MarketClosed
}


struct Market{
    address contractAddress;
    uint256 tokenId;
    EOrderType orderType;
    EOrderStatus orderStatus;
    uint256 askAmount;
    uint256 maxAskAmount;
    address payable currentOwner;
    address newOwner;
} 


IERC20 public _wrapToken;
uint256 public _feePercentage;
address  payable public _feeDestinationAddress;
mapping (bytes32 => Market) public markets;


constructor(address wrapToken,
            uint256 feePercentage,
            address payable feeDestinationAddress){
    _feePercentage = feePercentage;
    _feeDestinationAddress = feeDestinationAddress;
    _wrapToken = IERC20(wrapToken);
}
function setWrapToken(address wrapToken) external onlyOwner{
    _wrapToken = IERC20(wrapToken);
}
function getWrapToken() external view returns(address wrapToken){
    return address(_wrapToken);
}
function setFeePercentage (uint256 value) external onlyOwner{
    _feePercentage = value; 
}

function setFeeDestinationAddress (address payable value) external onlyOwner{
    _feeDestinationAddress = value; 
}

function getPrivateUniqueKey(address nftContractId, uint256 tokenId) private pure returns (bytes32){
    return keccak256(abi.encodePacked(nftContractId, tokenId));
}

function getMarketObj(address nftContractId, uint256 tokenId) public view returns (Market memory){
    bytes32 uniqueKey = getPrivateUniqueKey(nftContractId,tokenId);

    return markets[uniqueKey];
}

function openMarketForFixedType(address nftContractId, uint256 tokenId, uint256 price ) external{
   openMarket(nftContractId,tokenId,price,EOrderType.Fixed, 0);
}

function openMarketForAuctionType(address nftContractId, uint256 tokenId, uint256 price, uint256 maxPrice) external{
    openMarket(nftContractId,tokenId,price,EOrderType.Auction, maxPrice);
}

function openMarket(address nftContractId, uint256 tokenId, uint256 price, EOrderType orderType, uint256 maxPrice) private{
    bytes32 uniqueKey = getPrivateUniqueKey(nftContractId,tokenId);

    /// For update lisitng.
    if (markets[uniqueKey].orderStatus == EOrderStatus.OpenForTheMarket) {
        address nftCurrentOwner = INFTContract(nftContractId).ownerOf(
            tokenId );
        if ( nftCurrentOwner == msg.sender &&
            nftCurrentOwner != markets[uniqueKey].currentOwner) {
            markets[uniqueKey].orderType = orderType;
            markets[uniqueKey].askAmount = price;
            markets[uniqueKey].maxAskAmount = maxPrice;
            markets[uniqueKey].currentOwner = payable(nftCurrentOwner);
            return;
        } else if (nftCurrentOwner == markets[uniqueKey].currentOwner) {
            revert("Market order is already opened");
        } else {
            revert("Not authorized");
        }
    }
    if(price <= 0){
        revert ("Price Should be greater then 0");
    }

    if(orderType == EOrderType.Auction && price > maxPrice){
        revert ("end Price Should be greater then price");
    }

    markets[uniqueKey].orderStatus = EOrderStatus.OpenForTheMarket;
    markets[uniqueKey].orderType = orderType;
    markets[uniqueKey].askAmount = price;
    markets[uniqueKey].maxAskAmount = maxPrice;
    markets[uniqueKey].contractAddress = nftContractId;
    markets[uniqueKey].tokenId = tokenId;
    markets[uniqueKey].currentOwner = payable(msg.sender);
}

function closeMarketForFixedType(address nftContractId, uint256 tokenId ) external payable{ 
    bytes32 uniqueKey = getPrivateUniqueKey(nftContractId,tokenId);
    
    if(markets[uniqueKey].orderStatus == EOrderStatus.OpenForTheMarket){
      
        if(markets[uniqueKey].orderType == EOrderType.None){
            revert ("nft not opened");
        }
        else if(markets[uniqueKey].orderType == EOrderType.Fixed){
            if(markets[uniqueKey].askAmount < msg.value){
                revert ("Value not matched");
            }
        }else if (markets[uniqueKey].orderType == EOrderType.Auction){
           if(markets[uniqueKey].maxAskAmount < msg.value){
                revert ("Value not matched");
            }
        }


        INFTContract nftContract = INFTContract(markets[uniqueKey].contractAddress);

        //platform fee
        uint256 fee = getFeePercentage(msg.value, _feePercentage);
        _feeDestinationAddress.transfer(fee);

        // creator royality 
        (address creator, uint256 royality) = nftContract.getRoyalityDetails(tokenId);
        uint256 amtforCreator = getFeePercentage(msg.value,royality);
        payable(creator).transfer(amtforCreator); 
        // //seller amouynt trans 
        markets[uniqueKey].currentOwner.transfer(msg.value.sub(fee+amtforCreator));

        // transfer nft to new user 
        nftContract.safeTransferFrom(markets[uniqueKey].currentOwner, msg.sender, tokenId);

        // nft market close
        markets[uniqueKey].orderStatus = EOrderStatus.MarketClosed;
        markets[uniqueKey].newOwner = msg.sender;

    }else{
        revert ("Market order is not opened");
    }
}

function closeMarketForAuctionType(address nftContractId, uint256 tokenId, uint256 price, address buyerAccount ) external{
    bytes32 uniqueKey = getPrivateUniqueKey(nftContractId,tokenId);

    if(markets[uniqueKey].currentOwner != msg.sender){
        revert ("only for market operator");
    }    
    if(markets[uniqueKey].orderStatus == EOrderStatus.OpenForTheMarket){

        if(markets[uniqueKey].askAmount < price){
            INFTContract nftContract = INFTContract(markets[uniqueKey].contractAddress);

            //platform fee
            uint256 fee = getFeePercentage(price, _feePercentage);
            
            _wrapToken.transferFrom(buyerAccount,_feeDestinationAddress,fee);

            // Creator Royality 
            (address creator, uint256 royality) = nftContract.getRoyalityDetails(tokenId);
            uint256 amtforCreator = getFeePercentage(price,royality);
            _wrapToken.transferFrom(buyerAccount,creator,amtforCreator);
            //seller amouynt trans 
            _wrapToken.transferFrom(buyerAccount,markets[uniqueKey].currentOwner,price.sub(fee+amtforCreator));

            // transfer nft to new user 
            nftContract.safeTransferFrom(markets[uniqueKey].currentOwner, buyerAccount, tokenId);

            // nft market close
            markets[uniqueKey].orderStatus = EOrderStatus.MarketClosed;
            markets[uniqueKey].newOwner = buyerAccount;

        }else{
            revert ("Value not matched");
        }
    }else{
        revert ("Market order is not opened");
    }
}

function getFeePercentage(uint256 price, uint256 percent) private pure returns (uint256){
    return price.mul(percent).div(100);
}



    function cancel(address nftContractId, uint256 tokenId) external {
        bytes32 uniqueKey = getPrivateUniqueKey(nftContractId, tokenId);

        if ( INFTContract(nftContractId).ownerOf(tokenId) == msg.sender || owner() == msg.sender ) {
            if (
                markets[uniqueKey].orderStatus == EOrderStatus.OpenForTheMarket
            ) {
                markets[uniqueKey].orderStatus = EOrderStatus.MarketCancelled;
            } else {
                revert("Market order is not opened");
            }
        } else {
            revert("Not authorized");
        }
    }

}

// File: IERC20.sol



// SPDX-License-Identifier: MIT

pragma solidity 0.8.4;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @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 `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, 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 `sender` to `recipient` 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 sender,
        address recipient,
        uint256 amount
    ) external returns (bool);

    /**
     * @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
    );
}

// File: INFTContract.sol



//SPDX-License-Identifier: MIT
pragma solidity =0.8.4;

interface INFTContract {
    // --------------- ERC1155 -----------------------------------------------------

    // todo: the /** */ and /// comments trip me out. Use /** */ format everywhere

    /**
        @notice Get the balance of an account's tokens.
        @param _owner  The address of the token holder
        @param _id     ID of the token
        @return        The _owner's balance of the token type requested
     */
    function balanceOf(address _owner, uint256 _id)
        external
        view
        returns (uint256);

    /**
        @notice Enable or disable approval for a third party ("operator") to manage all of the caller's tokens.
        @dev MUST emit the ApprovalForAll event on success.
        @param _operator  Address to add to the set of authorized operators
        @param _approved  True if the operator is approved, false to revoke approval
    */
    function setApprovalForAll(address _operator, bool _approved) external;

    /// @notice Transfers `_value` amount of an `_id` from the `_from` address to the `_to` address specified (with safety call).
    /// @dev Caller must be approved to manage the tokens being transferred out of the `_from` account (see "Approval" section of the standard).
    /// MUST revert if `_to` is the zero address.
    /// MUST revert if balance of holder for token `_id` is lower than the `_value` sent.
    /// MUST revert on any other error.
    /// MUST emit the `TransferSingle` event to reflect the balance change (see "Safe Transfer Rules" section of the standard).
    /// After the above conditions are met, this function MUST check if `_to` is a smart contract (e.g. code size > 0). If so, it MUST call `onERC1155Received` on `_to` and act appropriately (see "Safe Transfer Rules" section of the standard).
    /// @param _from    Source address
    /// @param _to      Target address
    /// @param _id      ID of the token type
    /// @param _value   Transfer amount
    /// @param _data    Additional data with no specified format, MUST be sent unaltered in call to `onERC1155Received` on `_to`
    function safeTransferFrom(
        address _from,
        address _to,
        uint256 _id,
        uint256 _value,
        bytes calldata _data
    ) external;

    /**
        @notice Transfers `_values` amount(s) of `_ids` from the `_from` address to the `_to` address specified (with safety call).
        @dev Caller must be approved to manage the tokens being transferred out of the `_from` account (see "Approval" section of the standard).
        MUST revert if `_to` is the zero address.
        MUST revert if length of `_ids` is not the same as length of `_values`.
        MUST revert if any of the balance(s) of the holder(s) for token(s) in `_ids` is lower than the respective amount(s) in `_values` sent to the recipient.
        MUST revert on any other error.        
        MUST emit `TransferSingle` or `TransferBatch` event(s) such that all the balance changes are reflected (see "Safe Transfer Rules" section of the standard).
        Balance changes and events MUST follow the ordering of the arrays (_ids[0]/_values[0] before _ids[1]/_values[1], etc).
        After the above conditions for the transfer(s) in the batch are met, this function MUST check if `_to` is a smart contract (e.g. code size > 0). If so, it MUST call the relevant `ERC1155TokenReceiver` hook(s) on `_to` and act appropriately (see "Safe Transfer Rules" section of the standard).                      
        @param _from    Source address
        @param _to      Target address
        @param _ids     IDs of each token type (order and length must match _values array)
        @param _values  Transfer amounts per token type (order and length must match _ids array)
        @param _data    Additional data with no specified format, MUST be sent unaltered in call to the `ERC1155TokenReceiver` hook(s) on `_to`
    */
    function safeBatchTransferFrom(
        address _from,
        address _to,
        uint256[] calldata _ids,
        uint256[] calldata _values,
        bytes calldata _data
    ) external;

    // ---------------------- ERC721 ------------------------------------------------

    /// @notice Find the owner of an NFT
    /// @dev NFTs assigned to zero address are considered invalid, and queries
    ///  about them do throw.
    /// @param tokenId The identifier for an NFT
    /// @return owner  The address of the owner of the NFT
    function ownerOf(uint256 tokenId) external view returns (address owner);

    // function setApprovalForAll(address _operator, bool _approved) external;

    /// @notice Change or reaffirm the approved address for an NFT
    /// @dev The zero address indicates there is no approved address.
    ///  Throws unless `msg.sender` is the current NFT owner, or an authorized
    ///  operator of the current owner.
    /// @param _approved The new approved NFT controller
    /// @param _tokenId The NFT to approve
    function approve(address _approved, uint256 _tokenId) external payable;

    /// @notice Transfers the ownership of an NFT from one address to another address
    /// @dev Throws unless `msg.sender` is the current owner, an authorized
    ///  operator, or the approved address for this NFT. Throws if `_from` is
    ///  not the current owner. Throws if `_to` is the zero address. Throws if
    ///  `_tokenId` is not a valid NFT. When transfer is complete, this function
    ///  checks if `_to` is a smart contract (code size > 0). If so, it calls
    ///  `onERC721Received` on `_to` and throws if the return value is not
    ///  `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`.
    /// @param _from The current owner of the NFT
    /// @param _to The new owner
    /// @param _tokenId The NFT to transfer
    /// @param data Additional data with no specified format, sent in call to `_to`
    function safeTransferFrom(
        address _from,
        address _to,
        uint256 _tokenId,
        bytes calldata data
    ) external payable;

    /// @notice Transfers the ownership of an NFT from one address to another address
    /// @dev This works identically to the other function with an extra data parameter,
    ///  except this function just sets data to "".
    /// @param _from The current owner of the NFT
    /// @param _to The new owner
    /// @param _tokenId The NFT to transfer
    function safeTransferFrom(
        address _from,
        address _to,
        uint256 _tokenId
    ) external payable;


     function getRoyalityDetails(uint256 _tokenId) external view returns(address creator, uint256 percentage);

    // -------------------------------------------------------------------------------
}



/*
 * 88888888ba  88      a8P  88
 * 88      "8b 88    ,88'   88
 * 88      ,8P 88  ,88"     88
 * 88aaaaaa8P' 88,d88'      88
 * 88""""88'   8888"88,     88
 * 88    `8b   88P   Y8b    88
 * 88     `8b  88     "88,  88
 * 88      `8b 88       Y8b 88888888888
 *
 * Marketplace: interfaces/INFTContract.sol
 *
 * MIT License
 * ===========
 *
 * Copyright (c) 2022 Marketplace
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 */
// File: Ownable.sol



// SPDX-License-Identifier: MIT
pragma solidity 0.8.4;

/**
 * @notice Contract is a inheritable smart contract that will add a
 * New modifier called onlyOwner available in the smart contract inherting it
 *
 * onlyOwner makes a function only callable from the Token owner
 *
 */
contract Ownable {
    // _owner is the owner of the Token
    address private _owner;

    /**
     * Event OwnershipTransferred is used to log that a ownership change of the token has occured
     */
    event OwnershipTransferred(
        address indexed previousOwner,
        address indexed newOwner
    );

    /**
     * Modifier
     * We create our own function modifier called onlyOwner, it will Require the current owner to be
     * the same as msg.sender
     */
    modifier onlyOwner() {
        require(
            _owner == msg.sender,
            "Ownable: only owner can call this function"
        );
        // This _; is not a TYPO, It is important for the compiler;
        _;
    }

    constructor() {
        _owner = msg.sender;
        emit OwnershipTransferred(address(0), _owner);
    }

    /**
     * @notice owner() returns the currently assigned owner of the Token
     *
     */
    function owner() public view returns (address) {
        return _owner;
    }

    /**
     * @notice renounceOwnership will set the owner to zero address
     * This will make the contract owner less, It will make ALL functions with
     * onlyOwner no longer callable.
     * There is no way of restoring the owner
     */
    function renounceOwnership() public onlyOwner {
        emit OwnershipTransferred(_owner, address(0));
        _owner = address(0);
    }

    /**
     * @notice transferOwnership will assign the {newOwner} as owner
     *
     */
    function transferOwnership(address newOwner) public onlyOwner {
        _transferOwnership(newOwner);
    }

    /**
     * @notice _transferOwnership will assign the {newOwner} as owner
     *
     */
    function _transferOwnership(address newOwner) internal {
        require(
            newOwner != address(0),
            "Ownable: new owner is the zero address"
        );
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}

// File: SafeMath.sol



// SPDX-License-Identifier: MIT

pragma solidity 0.8.4;

// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.

/**
 * @dev Wrappers over Solidity's arithmetic operations.
 *
 * NOTE: `SafeMath` is no longer needed starting with Solidity 0.8. The compiler
 * now has built in overflow checking.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b)
        internal
        pure
        returns (bool, uint256)
    {
        unchecked {
            uint256 c = a + b;
            if (c < a) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the substraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b)
        internal
        pure
        returns (bool, uint256)
    {
        unchecked {
            if (b > a) return (false, 0);
            return (true, a - b);
        }
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(uint256 a, uint256 b)
        internal
        pure
        returns (bool, uint256)
    {
        unchecked {
            // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
            // benefit is lost if 'b' is also tested.
            // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
            if (a == 0) return (true, 0);
            uint256 c = a * b;
            if (c / a != b) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(uint256 a, uint256 b)
        internal
        pure
        returns (bool, uint256)
    {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a / b);
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(uint256 a, uint256 b)
        internal
        pure
        returns (bool, uint256)
    {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a % b);
        }
    }

    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        return a + b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return a - b;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        return a * b;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator.
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return a % b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b <= a, errorMessage);
            return a - b;
        }
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a / b;
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a % b;
        }
    }
}