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Contract

0xe563557Fd604e3A40FfF57A8F5B9082AaEa10016

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Cancel Sell22248872022-11-04 11:18:06509 days ago1667560686IN
0xe563557F...AaEa10016
0 GLMR0.01287072102.5
Cancel Sell17981582022-09-04 17:05:30570 days ago1662311130IN
0xe563557F...AaEa10016
0 GLMR0.01252632102.5
Cancel Sell17415042022-08-27 13:53:18578 days ago1661608398IN
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0 GLMR0.01123892102.5
Sell16648952022-08-16 14:08:18589 days ago1660658898IN
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0 GLMR0.02165292102.5
Cancel Sell16098422022-08-08 15:44:24597 days ago1659973464IN
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0 GLMR0.01252632102.5
Cancel Sell15666502022-08-02 9:27:24604 days ago1659432444IN
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0 GLMR0.01252632102.5
Cancel Sell15607092022-08-01 12:34:18604 days ago1659357258IN
0xe563557F...AaEa10016
0 GLMR0.01286969102.5
Cancel Sell15606932022-08-01 12:31:06604 days ago1659357066IN
0xe563557F...AaEa10016
0 GLMR0.01287072102.5
Cancel Sell15606902022-08-01 12:30:18604 days ago1659357018IN
0xe563557F...AaEa10016
0 GLMR0.01123892102.5
Sell15433182022-07-29 23:03:24607 days ago1659135804IN
0xe563557F...AaEa10016
0 GLMR0.01188579102.5
Cancel Sell15433122022-07-29 23:02:12607 days ago1659135732IN
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0 GLMR0.01287072102.5
Sell15141702022-07-25 16:30:54611 days ago1658766654IN
0xe563557F...AaEa10016
0 GLMR0.01186314102.5
Cancel Sell15141642022-07-25 16:29:42611 days ago1658766582IN
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0 GLMR0.01286969102.5
Sell14884982022-07-21 22:08:30615 days ago1658441310IN
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0 GLMR0.01188477102.5
Cancel Sell14884822022-07-21 22:04:54615 days ago1658441094IN
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0 GLMR0.01287072102.5
Sell14836322022-07-21 5:05:48616 days ago1658379948IN
0xe563557F...AaEa10016
0 GLMR0.02330737102.5
Sell14402342022-07-14 20:20:36622 days ago1657830036IN
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0 GLMR0.01188579102.5
Cancel Sell14400932022-07-14 19:50:24622 days ago1657828224IN
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0 GLMR0.01287072102.5
Sell14384252022-07-14 13:56:36622 days ago1657806996IN
0xe563557F...AaEa10016
0 GLMR0.01186314102.5
Cancel Sell14384182022-07-14 13:55:06622 days ago1657806906IN
0xe563557F...AaEa10016
0 GLMR0.01286969102.5
Cancel Sell14352382022-07-14 2:38:36623 days ago1657766316IN
0xe563557F...AaEa10016
0 GLMR0.01287072102.5
Sell14328282022-07-13 18:04:30623 days ago1657735470IN
0xe563557F...AaEa10016
0 GLMR0.01188477102.5
Sell14327702022-07-13 17:52:12623 days ago1657734732IN
0xe563557F...AaEa10016
0 GLMR0.01188579102.5
Sell14231322022-07-12 8:01:30625 days ago1657612890IN
0xe563557F...AaEa10016
0 GLMR0.01186314102.5
Cancel Sell14231252022-07-12 8:00:06625 days ago1657612806IN
0xe563557F...AaEa10016
0 GLMR0.01286969102.5
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13444402022-06-30 18:19:24636 days ago1656613164
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326.7 GLMR
13444402022-06-30 18:19:24636 days ago1656613164
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3.3 GLMR
12890742022-06-22 12:47:42644 days ago1655902062
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365.31 GLMR
12890742022-06-22 12:47:42644 days ago1655902062
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3.69 GLMR
10295632022-05-15 8:00:06683 days ago1652601606
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197.01 GLMR
10295632022-05-15 8:00:06683 days ago1652601606
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1.99 GLMR
10294532022-05-15 7:37:18683 days ago1652600238
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173.25 GLMR
10294532022-05-15 7:37:18683 days ago1652600238
0xe563557F...AaEa10016
1.75 GLMR
9969042022-05-10 13:29:30687 days ago1652189370
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167.31 GLMR
9969042022-05-10 13:29:30687 days ago1652189370
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1.69 GLMR
9771422022-05-07 15:07:24690 days ago1651936044
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297 GLMR
9771422022-05-07 15:07:24690 days ago1651936044
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3 GLMR
4488982022-02-20 14:30:24766 days ago1645367424
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127.71 GLMR
4488982022-02-20 14:30:24766 days ago1645367424
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1.29 GLMR
3963592022-02-12 16:22:30774 days ago1644682950
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236.61 GLMR
3963592022-02-12 16:22:30774 days ago1644682950
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2.39 GLMR
3396252022-02-04 12:54:12782 days ago1643979252
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414.81 GLMR
3396252022-02-04 12:54:12782 days ago1643979252
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4.19 GLMR
2974892022-01-29 12:37:00788 days ago1643459820
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989.01 GLMR
2974892022-01-29 12:37:00788 days ago1643459820
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9.99 GLMR
2768442022-01-26 13:46:36791 days ago1643204796
0xe563557F...AaEa10016
0.0099 GLMR
2768442022-01-26 13:46:36791 days ago1643204796
0xe563557F...AaEa10016
0.0001 GLMR
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Contract Source Code Verified (Exact Match)

Contract Name:
NftMarket

Compiler Version
v0.6.7+commit.b8d736ae

Optimization Enabled:
No with 200 runs

Other Settings:
default evmVersion

Contract Source Code (Solidity Standard Json-Input format)

File 1 of 11 : NftMarket.sol
pragma solidity ^0.6.7;
pragma experimental ABIEncoderV2;

import "./../openzeppelin/contracts/token/ERC20/IERC20.sol";
import "./../openzeppelin/contracts/math/SafeMath.sol";
import "./../openzeppelin/contracts/token/ERC721/IERC721.sol";
import "./../openzeppelin/contracts/token/ERC721/IERC721Receiver.sol";
import "./../openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import "./../openzeppelin/contracts/access/Ownable.sol";
import "./../openzeppelin/contracts/security/ReentrancyGuard.sol";

/// @title Nft Market is a trading platform on seascape network allowing to buy and sell Nfts
/// @author Nejc Schneider
contract NftMarket is IERC721Receiver, ReentrancyGuard, Ownable {
    using SafeERC20 for IERC20;
    using SafeMath for uint256;

    /// @notice individual sale related data
    struct SalesObject {
        uint256 id;               // sales ID
        uint256 tokenId;          // token unique id
        address nft;              // nft address
        address currency;         // currency address
        address payable seller;   // seller address
        address payable buyer;    // buyer address
        uint256 startTime;        // timestamp when the sale starts
        uint256 price;            // nft price
        uint8 status;             // 2 = sale canceled, 1 = sold, 0 = for sale
    }

    /// @dev keep count of SalesObject amount
    uint256 public salesAmount;

    /// @dev store sales objects.
    /// @param nft token address => (nft id => salesObject)
    mapping(address => mapping(uint256 => SalesObject)) salesObjects; // store sales in a mapping

    /// @dev supported ERC721 and ERC20 contracts
    mapping(address => bool) public supportedNft;
    mapping(address => bool) public supportedCurrency;

    /// @notice enable/disable trading
    bool public salesEnabled;

    /// @dev fee rate and fee reciever. feeAmount = (feeRate / 1000) * price
    uint256 public feeRate;
    address payable feeReceiver;

    event Buy(
        uint256 indexed id,
        uint256 tokenId,
        address buyer,
        uint256 price,
        uint256 tipsFee,
        address currency
    );

    event Sell(
        uint256 indexed id,
        uint256 tokenId,
        address nft,
        address currency,
        address seller,
        address buyer,
        uint256 startTime,
        uint256 price
    );

    event SaleCanceled(uint256 indexed id, uint256 tokenId);
    event NftReceived(address operator, address from, uint256 tokenId, bytes data);

    /// @dev set fee reciever address and fee rate
    /// @param _feeReceiver fee receiving address
    /// @param _feeRate fee amount
    constructor(address payable _feeReceiver, uint256 _feeRate) public {
        feeReceiver = _feeReceiver;
        feeRate = _feeRate;
        initReentrancyStatus();
    }

    //--------------------------------------------------
    // External methods
    //--------------------------------------------------

    /// @notice enable/disable sales
    /// @param _salesEnabled set sales to true/false
    function enableSales(bool _salesEnabled) external onlyOwner { salesEnabled = _salesEnabled; }

    /// @notice add supported nft token
    /// @param _nftAddress ERC721 contract address
    function addSupportedNft(address _nftAddress) external onlyOwner {
        require(_nftAddress != address(0x0), "invalid address");
        supportedNft[_nftAddress] = true;
    }

    /// @notice disable supported nft token
    /// @param _nftAddress ERC721 contract address
    function removeSupportedNft(address _nftAddress) external onlyOwner {
        require(_nftAddress != address(0x0), "invalid address");
        supportedNft[_nftAddress] = false;
    }

    /// @notice add supported currency token
    /// @param _currencyAddress ERC20 contract address
    function addSupportedCurrency(address _currencyAddress) external onlyOwner {
        require(!supportedCurrency[_currencyAddress], "currency already supported");
        supportedCurrency[_currencyAddress] = true;
    }

    /// @notice disable supported currency token
    /// @param _currencyAddress ERC20 contract address
    function removeSupportedCurrency(address _currencyAddress) external onlyOwner {
        require(supportedCurrency[_currencyAddress], "currency already removed");
        supportedCurrency[_currencyAddress] = false;
    }

    /// @notice change fee receiver address
    /// @param _walletAddress address of the new fee receiver
    function setFeeReceiver(address payable _walletAddress) external onlyOwner {
        require(_walletAddress != address(0x0), "invalid address");
        feeReceiver = _walletAddress;
    }

    /// @notice change fee rate
    /// @param _rate amount value. Actual rate in percent = _rate / 10
    function setFeeRate(uint256 _rate) external onlyOwner {
        require(_rate <= 100, "Rate should be bellow 100 (10%)");
        feeRate = _rate;
    }

    /// @notice returns sales amount
    /// @return total amount of sales objects
    function getSalesAmount() external view returns(uint) { return salesAmount; }

    //--------------------------------------------------
    // Public methods
    //--------------------------------------------------

    /// @notice cancel nft sale
    /// @param _tokenId nft unique ID
    /// @param _nftAddress nft token address
    function cancelSell(uint _tokenId, address _nftAddress) public nonReentrant {
        SalesObject storage obj = salesObjects[_nftAddress][_tokenId];
        require(obj.status == 0, "status: sold or canceled");
        require(obj.seller == msg.sender, "seller not nft owner");
        require(salesEnabled, "sales are closed");

        obj.status = 2;
        IERC721 nft = IERC721(obj.nft);
        nft.safeTransferFrom(address(this), obj.seller, obj.tokenId);

        emit SaleCanceled(_tokenId, obj.tokenId);
    }

    /// @notice put nft for sale
    /// @param _tokenId nft unique ID
    /// @param _price required price to pay by buyer. Seller receives less: price - fees
    /// @param _nftAddress nft token address
    /// @param _currency currency token address
    /// @return salesAmount total amount of sales
    function sell(uint256 _tokenId, uint256 _price, address _nftAddress, address _currency)
        public
        nonReentrant
        returns(uint)
    {
        require(_nftAddress != address(0x0), "invalid nft address");
        require(_tokenId != 0, "invalid nft token");
        require(salesEnabled, "sales are closed");
        require(supportedNft[_nftAddress], "nft address unsupported");
        require(supportedCurrency[_currency], "currency not supported");
        IERC721(_nftAddress).safeTransferFrom(msg.sender, address(this), _tokenId);

        salesAmount++;

        salesObjects[_nftAddress][_tokenId] = SalesObject(
            salesAmount,
            _tokenId,
            _nftAddress,
            _currency,
            msg.sender,
            address(0x0),
            now,
            _price,
            0
        );

        emit Sell(
            salesAmount,
            _tokenId,
            _nftAddress,
            _currency,
            msg.sender,
            address(0x0),
            now,
            _price
        );

        return salesAmount;
    }

    /// @dev encrypt token data
    function onERC721Received(
        address operator,
        address from,
        uint256 tokenId,
        bytes memory data
    )
        public
        override
        returns (bytes4)
    {
        //only receive the _nft staff
        if (address(this) != operator) {
            //invalid from nft
            return 0;
        }

        //success
        emit NftReceived(operator, from, tokenId, data);
        return bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"));
    }

    /// @notice buy nft
    /// @param _tokenId nft unique ID
    /// @param _nftAddress nft token address
    /// @param _currency currency token address
    function buy(uint _tokenId, address _nftAddress, address _currency)
        public
        nonReentrant
        payable
    {
        SalesObject storage obj = salesObjects[_nftAddress][_tokenId];
        require(obj.status == 0, "status: sold or canceled");
        require(obj.startTime <= now, "not yet for sale");
        require(salesEnabled, "sales are closed");
        require(msg.sender != obj.seller, "cant buy from yourself");

        require(obj.currency == _currency, "must pay same currency as sold");
        uint256 price = this.getSalesPrice(_tokenId, _nftAddress);
        uint256 tipsFee = price.mul(feeRate).div(1000);
        uint256 purchase = price.sub(tipsFee);

        if (obj.currency == address(0x0)) {
            require (msg.value >= price, "your price is too low");
            uint256 returnBack = msg.value.sub(price);
            if (returnBack > 0)
                msg.sender.transfer(returnBack);
            if (tipsFee > 0)
                feeReceiver.transfer(tipsFee);
            obj.seller.transfer(purchase);
        } else {
            IERC20(obj.currency).safeTransferFrom(msg.sender, feeReceiver, tipsFee);
            IERC20(obj.currency).safeTransferFrom(msg.sender, obj.seller, purchase);
        }

        IERC721 nft = IERC721(obj.nft);
        nft.safeTransferFrom(address(this), msg.sender, obj.tokenId);
        obj.buyer = msg.sender;

        obj.status = 1;
        emit Buy(obj.id, obj.tokenId, msg.sender, price, tipsFee, obj.currency);
    }

    /// @dev fetch sale object at nftId and nftAddress
    /// @param _tokenId unique nft ID
    /// @param _nftAddress nft token address
    /// @return SalesObject at given index
    function getSales(uint _tokenId, address _nftAddress)
        public
        view
        returns(SalesObject memory)
    {
        return salesObjects[_nftAddress][_tokenId];
    }

    /// @dev returns the price of sale
    /// @param _tokenId nft unique ID
    /// @param _nftAddress nft token address
    /// @return obj.price price of corresponding sale
    function getSalesPrice(uint _tokenId, address _nftAddress) public view returns (uint256) {
        SalesObject storage obj = salesObjects[_nftAddress][_tokenId];
        return obj.price;
    }

}

File 2 of 11 : Address.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.6.2;

/**
 * @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) {
        // According to EIP-1052, 0x0 is the value returned for not-yet created accounts
        // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
        // for accounts without code, i.e. `keccak256('')`
        bytes32 codehash;
        bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
        // solhint-disable-next-line no-inline-assembly
        assembly { codehash := extcodehash(account) }
        return (codehash != accountHash && codehash != 0x0);
    }

    /**
     * @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");

        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
        (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");
        return _functionCallWithValue(target, data, value, errorMessage);
    }

    function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
        require(isContract(target), "Address: call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
        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

                // solhint-disable-next-line no-inline-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

File 3 of 11 : IERC721Receiver.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.6.0;

/**
 * @title ERC721 token receiver interface
 * @dev Interface for any contract that wants to support safeTransfers
 * from ERC721 asset contracts.
 */
interface IERC721Receiver {
    /**
     * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
     * by `operator` from `from`, this function is called.
     *
     * It must return its Solidity selector to confirm the token transfer.
     * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
     *
     * The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
     */
    function onERC721Received(address operator, address from, uint256 tokenId, bytes calldata data)
    external returns (bytes4);
}

File 4 of 11 : IERC721.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.6.2;

import "../../introspection/IERC165.sol";

/**
 * @dev Required interface of an ERC721 compliant contract.
 */
interface IERC721 is IERC165 {
    /**
     * @dev Emitted when `tokenId` token is transfered from `from` to `to`.
     */
    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
     */
    event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
     */
    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);

    /**
     * @dev Returns the number of tokens in ``owner``'s account.
     */
    function balanceOf(address owner) external view returns (uint256 balance);

    /**
     * @dev Returns the owner of the `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function ownerOf(uint256 tokenId) external view returns (address owner);

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
     * are aware of the ERC721 protocol to prevent tokens from being forever locked.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(address from, address to, uint256 tokenId) external;

    /**
     * @dev Transfers `tokenId` token from `from` to `to`.
     *
     * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address from, address to, uint256 tokenId) external;

    /**
     * @dev Gives permission to `to` to transfer `tokenId` token to another account.
     * The approval is cleared when the token is transferred.
     *
     * Only a single account can be approved at a time, so approving the zero address clears previous approvals.
     *
     * Requirements:
     *
     * - The caller must own the token or be an approved operator.
     * - `tokenId` must exist.
     *
     * Emits an {Approval} event.
     */
    function approve(address to, uint256 tokenId) external;

    /**
     * @dev Returns the account approved for `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function getApproved(uint256 tokenId) external view returns (address operator);

    /**
     * @dev Approve or remove `operator` as an operator for the caller.
     * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
     *
     * Requirements:
     *
     * - The `operator` cannot be the caller.
     *
     * Emits an {ApprovalForAll} event.
     */
    function setApprovalForAll(address operator, bool _approved) external;

    /**
     * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
     *
     * See {setApprovalForAll}
     */
    function isApprovedForAll(address owner, address operator) external view returns (bool);

    /**
      * @dev Safely transfers `tokenId` token from `from` to `to`.
      *
      * Requirements:
      *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
      * - `tokenId` token must exist and be owned by `from`.
      * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
      * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
      *
      * Emits a {Transfer} event.
      */
    function safeTransferFrom(address from, address to, uint256 tokenId, bytes calldata data) external;
}

File 5 of 11 : SafeERC20.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.6.0;

import "./IERC20.sol";
import "../../math/SafeMath.sol";
import "../../utils/Address.sol";

/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
    using SafeMath for uint256;
    using Address for address;

    function safeTransfer(IERC20 token, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IERC20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(IERC20 token, address spender, uint256 value) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        // solhint-disable-next-line max-line-length
        require((value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
    }

    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 newAllowance = token.allowance(address(this), spender).add(value);
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    /**
     * @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, "SafeERC20: low-level call failed");
        if (returndata.length > 0) { // Return data is optional
            // solhint-disable-next-line max-line-length
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}

File 6 of 11 : IERC20.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.6.0;

/**
 * @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 7 of 11 : ReentrancyGuard.sol
// File: contracts/library/ReentrancyGuard.sol

pragma solidity ^0.6.7;

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() internal {
        _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 make it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        // On the first call to nonReentrant, _notEntered will be true
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

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

        _;

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

    function initReentrancyStatus() internal {
        _status = _NOT_ENTERED;
    }
}

File 8 of 11 : SafeMath.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.6.0;

/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeMath {
    /**
     * @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) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");

        return c;
    }

    /**
     * @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 sub(a, b, "SafeMath: subtraction overflow");
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        uint256 c = a - b;

        return c;
    }

    /**
     * @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) {
        // 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 0;
        }

        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");

        return c;
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts 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) internal pure returns (uint256) {
        return div(a, b, "SafeMath: division by zero");
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts 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) {
        require(b > 0, errorMessage);
        uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold

        return c;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts 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 mod(a, b, "SafeMath: modulo by zero");
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts with custom message 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, string memory errorMessage) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }
}

File 9 of 11 : IERC165.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.6.0;

/**
 * @dev Interface of the ERC165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[EIP].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165 {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

File 10 of 11 : Ownable.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.6.0;

import "../GSN/Context.sol";
/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
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 () internal {
        address msgSender = _msgSender();
        _owner = msgSender;
        emit OwnershipTransferred(address(0), msgSender);
    }

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

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(_owner == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

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

File 11 of 11 : Context.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.6.0;

/*
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with GSN meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address payable) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes memory) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}

Settings
{
  "remappings": [],
  "optimizer": {
    "enabled": false,
    "runs": 200
  },
  "evmVersion": "istanbul",
  "libraries": {},
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

Contract Security Audit

Contract ABI

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payable","name":"_feeReceiver","type":"address"},{"internalType":"uint256","name":"_feeRate","type":"uint256"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"id","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"tokenId","type":"uint256"},{"indexed":false,"internalType":"address","name":"buyer","type":"address"},{"indexed":false,"internalType":"uint256","name":"price","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"tipsFee","type":"uint256"},{"indexed":false,"internalType":"address","name":"currency","type":"address"}],"name":"Buy","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"operator","type":"address"},{"indexed":false,"internalType":"address","name":"from","type":"address"},{"indexed":false,"internalType":"uint256","name":"tokenId","type":"uint256"},{"indexed":false,"internalType":"bytes","name":"data","type":"bytes"}],"name":"NftReceived","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"id","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"SaleCanceled","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"id","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"tokenId","type":"uint256"},{"indexed":false,"internalType":"address","name":"nft","type":"address"},{"indexed":false,"internalType":"address","name":"currency","type":"address"},{"indexed":false,"internalType":"address","name":"seller","type":"address"},{"indexed":false,"internalType":"address","name":"buyer","type":"address"},{"indexed":false,"internalType":"uint256","name":"startTime","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"price","type":"uint256"}],"name":"Sell","type":"event"},{"inputs":[{"internalType":"address","name":"_currencyAddress","type":"address"}],"name":"addSupportedCurrency","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_nftAddress","type":"address"}],"name":"addSupportedNft","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_tokenId","type":"uint256"},{"internalType":"address","name":"_nftAddress","type":"address"},{"internalType":"address","name":"_currency","type":"address"}],"name":"buy","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_tokenId","type":"uint256"},{"internalType":"address","name":"_nftAddress","type":"address"}],"name":"cancelSell","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bool","name":"_salesEnabled","type":"bool"}],"name":"enableSales","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"feeRate","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_tokenId","type":"uint256"},{"internalType":"address","name":"_nftAddress","type":"address"}],"name":"getSales","outputs":[{"components":[{"internalType":"uint256","name":"id","type":"uint256"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"address","name":"nft","type":"address"},{"internalType":"address","name":"currency","type":"address"},{"internalType":"address payable","name":"seller","type":"address"},{"internalType":"address payable","name":"buyer","type":"address"},{"internalType":"uint256","name":"startTime","type":"uint256"},{"internalType":"uint256","name":"price","type":"uint256"},{"internalType":"uint8","name":"status","type":"uint8"}],"internalType":"struct NftMarket.SalesObject","name":"","type":"tuple"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getSalesAmount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_tokenId","type":"uint256"},{"internalType":"address","name":"_nftAddress","type":"address"}],"name":"getSalesPrice","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"operator","type":"address"},{"internalType":"address","name":"from","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"onERC721Received","outputs":[{"internalType":"bytes4","name":"","type":"bytes4"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_currencyAddress","type":"address"}],"name":"removeSupportedCurrency","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_nftAddress","type":"address"}],"name":"removeSupportedNft","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"salesAmount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"salesEnabled","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_tokenId","type":"uint256"},{"internalType":"uint256","name":"_price","type":"uint256"},{"internalType":"address","name":"_nftAddress","type":"address"},{"internalType":"address","name":"_currency","type":"address"}],"name":"sell","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_rate","type":"uint256"}],"name":"setFeeRate","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address 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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)

00000000000000000000000042360f7a29196813cfc48c1724ee8d498e64a3ae000000000000000000000000000000000000000000000000000000000000000a

-----Decoded View---------------
Arg [0] : _feeReceiver (address): 0x42360F7A29196813CfC48c1724ee8D498e64a3AE
Arg [1] : _feeRate (uint256): 10

-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 00000000000000000000000042360f7a29196813cfc48c1724ee8d498e64a3ae
Arg [1] : 000000000000000000000000000000000000000000000000000000000000000a


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Txn Hash Block Value Eth2 PubKey Valid
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.