ETH Price: $3,353.58 (+0.55%)
 

Overview

ETH Balance

14.517952050958445674 ETH

Eth Value

$48,687.16 (@ $3,353.58/ETH)

Token Holdings

Multichain Info

No addresses found
Transaction Hash
Method
Block
From
To
Settle Auction215200402024-12-31 4:22:4720 hrs ago1735618967IN
0x2cBe14b7...16C137F3C
0 ETH0.000462032.57438055
Cancel Auction215185442024-12-30 23:21:4725 hrs ago1735600907IN
0x2cBe14b7...16C137F3C
0 ETH0.000591267.78537007
Settle Auction215163692024-12-30 16:04:5933 hrs ago1735574699IN
0x2cBe14b7...16C137F3C
0 ETH0.0019007412.45933437
Create Auction215140132024-12-30 8:11:2341 hrs ago1735546283IN
0x2cBe14b7...16C137F3C
0 ETH0.000495445.18434354
Create Auction215138772024-12-30 7:44:1141 hrs ago1735544651IN
0x2cBe14b7...16C137F3C
0 ETH0.00032773.42914871
Settle Auction215127132024-12-30 3:49:2345 hrs ago1735530563IN
0x2cBe14b7...16C137F3C
0 ETH0.00050382.80692721
Deposit215119182024-12-30 1:09:472 days ago1735520987IN
0x2cBe14b7...16C137F3C
0.65 ETH0.000140984.89835223
Create Auction215094342024-12-29 16:50:592 days ago1735491059IN
0x2cBe14b7...16C137F3C
0 ETH0.000663557.70420709
Settle Auction215081652024-12-29 12:35:592 days ago1735475759IN
0x2cBe14b7...16C137F3C
0 ETH0.000853885.70137904
Settle Auction215079352024-12-29 11:49:472 days ago1735472987IN
0x2cBe14b7...16C137F3C
0 ETH0.00067324.29423702
Deposit215073082024-12-29 9:43:232 days ago1735465403IN
0x2cBe14b7...16C137F3C
0.3 ETH0.00011193.88779186
Change Auction215061432024-12-29 5:49:232 days ago1735451363IN
0x2cBe14b7...16C137F3C
0 ETH0.000240823.81949944
Create Auction215061362024-12-29 5:47:592 days ago1735451279IN
0x2cBe14b7...16C137F3C
0 ETH0.0002893.84541641
Create Auction215060262024-12-29 5:25:592 days ago1735449959IN
0x2cBe14b7...16C137F3C
0 ETH0.000288463.83828109
Create Auction215059412024-12-29 5:08:592 days ago1735448939IN
0x2cBe14b7...16C137F3C
0 ETH0.000286933.81784888
Change Auction215047312024-12-29 1:06:113 days ago1735434371IN
0x2cBe14b7...16C137F3C
0 ETH0.000215093.41475366
Create Auction215023392024-12-28 17:04:353 days ago1735405475IN
0x2cBe14b7...16C137F3C
0 ETH0.000586016.97492434
Create Auction215016412024-12-28 14:44:473 days ago1735397087IN
0x2cBe14b7...16C137F3C
0 ETH0.000637357.4
Create Auction215014542024-12-28 14:07:113 days ago1735394831IN
0x2cBe14b7...16C137F3C
0 ETH0.000461945.83403436
Create Auction215010492024-12-28 12:45:473 days ago1735389947IN
0x2cBe14b7...16C137F3C
0 ETH0.000464114.82047128
Create Auction214960822024-12-27 20:07:354 days ago1735330055IN
0x2cBe14b7...16C137F3C
0 ETH0.000554787.00231769
Create Auction214959372024-12-27 19:38:354 days ago1735328315IN
0x2cBe14b7...16C137F3C
0 ETH0.000727287.55000234
Deposit214949452024-12-27 16:19:114 days ago1735316351IN
0x2cBe14b7...16C137F3C
0.005 ETH0.000408358.9
Create Auction214949002024-12-27 16:10:114 days ago1735315811IN
0x2cBe14b7...16C137F3C
0 ETH0.000961639.98286228
Create Auction214947922024-12-27 15:48:234 days ago1735314503IN
0x2cBe14b7...16C137F3C
0 ETH0.0012486914.5
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Latest 25 internal transactions (View All)

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Parent Transaction Hash Block
From
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215200402024-12-31 4:22:4720 hrs ago1735618967
0x2cBe14b7...16C137F3C
0.132 ETH
215200402024-12-31 4:22:4720 hrs ago1735618967
0x2cBe14b7...16C137F3C
0.003 ETH
215200402024-12-31 4:22:4720 hrs ago1735618967
0x2cBe14b7...16C137F3C
0.015 ETH
215163692024-12-30 16:04:5933 hrs ago1735574699
0x2cBe14b7...16C137F3C
0.1176 ETH
215163692024-12-30 16:04:5933 hrs ago1735574699
0x2cBe14b7...16C137F3C
0.0024 ETH
215127132024-12-30 3:49:2345 hrs ago1735530563
0x2cBe14b7...16C137F3C
0.137192 ETH
215127132024-12-30 3:49:2345 hrs ago1735530563
0x2cBe14b7...16C137F3C
0.003118 ETH
215127132024-12-30 3:49:2345 hrs ago1735530563
0x2cBe14b7...16C137F3C
0.01559 ETH
215081652024-12-29 12:35:592 days ago1735475759
0x2cBe14b7...16C137F3C
0.0704 ETH
215081652024-12-29 12:35:592 days ago1735475759
0x2cBe14b7...16C137F3C
0.0016 ETH
215081652024-12-29 12:35:592 days ago1735475759
0x2cBe14b7...16C137F3C
0.008 ETH
215079352024-12-29 11:49:472 days ago1735472987
0x2cBe14b7...16C137F3C
0.044 ETH
215079352024-12-29 11:49:472 days ago1735472987
0x2cBe14b7...16C137F3C
0.001 ETH
215079352024-12-29 11:49:472 days ago1735472987
0x2cBe14b7...16C137F3C
0.005 ETH
214917362024-12-27 5:33:354 days ago1735277615
0x2cBe14b7...16C137F3C
0.03 ETH
214915862024-12-27 5:03:354 days ago1735275815
0x2cBe14b7...16C137F3C
0.1056 ETH
214915862024-12-27 5:03:354 days ago1735275815
0x2cBe14b7...16C137F3C
0.0024 ETH
214915862024-12-27 5:03:354 days ago1735275815
0x2cBe14b7...16C137F3C
0.012 ETH
214854962024-12-26 8:38:355 days ago1735202315
0x2cBe14b7...16C137F3C
0.176 ETH
214854962024-12-26 8:38:355 days ago1735202315
0x2cBe14b7...16C137F3C
0.004 ETH
214854962024-12-26 8:38:355 days ago1735202315
0x2cBe14b7...16C137F3C
0.02 ETH
214745362024-12-24 19:52:477 days ago1735069967
0x2cBe14b7...16C137F3C
0.176 ETH
214745362024-12-24 19:52:477 days ago1735069967
0x2cBe14b7...16C137F3C
0.004 ETH
214745362024-12-24 19:52:477 days ago1735069967
0x2cBe14b7...16C137F3C
0.02 ETH
214592972024-12-22 16:41:599 days ago1734885719
0x2cBe14b7...16C137F3C
0.3038 ETH
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Contract Source Code Verified (Exact Match)

Contract Name:
SealedArtMarket

Compiler Version
v0.8.18+commit.87f61d96

Optimization Enabled:
Yes with 4294967 runs

Other Settings:
default evmVersion
File 1 of 7 : SealedArtMarket.sol
pragma solidity ^0.8.7;

import "./EIP712.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "./SealedFundingFactory.sol";
import {BitMaps} from "@openzeppelin/contracts/utils/structs/BitMaps.sol";

interface IERC721 {
    function ownerOf(uint256 _tokenId) external view returns (address);
    function transferFrom(address _from, address _to, uint256 _tokenId) external;
}

interface RoyaltyEngine {
    function getRoyalty(address tokenAddress, uint256 tokenId, uint256 value)
        external
        returns (address payable[] memory recipients, uint256[] memory amounts);
}

contract SealedArtMarket is EIP712, Ownable {
    using BitMaps for BitMaps.BitMap;

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

    mapping(address => uint256) private _balances;
    string public constant name = "Sealed ETH";
    string public constant symbol = "SETH";
    uint8 public constant decimals = 18;

    function totalSupply() public view returns (uint256) {
        return address(this).balance;
    }

    // sequencer and settleSequencer are separated as an extra security measure against key leakage through side attacks
    // If a side channel attack is possible that requires multiple signatures to be made, settleSequencer will be more protected
    // against it because each signature will require an onchain action, which will make the attack extremely expensive
    // It also allows us to use different security systems for the two keys, since settleSequencer is much more sensitive
    address public sequencer; // Invariant: always different than address(0)
    address public settleSequencer; // Invariant: always different than address(0)
    address payable public treasury;
    SealedFundingFactory public immutable sealedFundingFactory;
    uint256 internal constant MAX_PROTOCOL_FEE = 0.1e18; // 10%
    uint256 public feeMultiplier;
    uint256 public forcedWithdrawDelay = 2 days;
    RoyaltyEngine public constant royaltyEngine = RoyaltyEngine(0xBc40d21999b4BF120d330Ee3a2DE415287f626C9);

    enum AuctionState {
        NONE, // 0 -> doesnt exist, default state
        CREATED,
        CLOSED
    }

    mapping(bytes32 => AuctionState) public auctionState;
    mapping(address => mapping(uint256 => mapping(uint256 => uint256))) public pendingWithdrawals;
    mapping(bytes32 => uint256) public pendingAuctionCancels;
    mapping(address => bool) public guardians;

    BitMaps.BitMap private usedNonces;
    mapping(address => BitMaps.BitMap) private usedOrderNonces;
    mapping(address => uint256) public accountCounter;

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

    constructor(address _sequencer, address payable _treasury, address _settleSequencer) {
        require(_sequencer != address(0) && _settleSequencer != address(0), "0x0 sequencer not allowed");
        sequencer = _sequencer;
        treasury = _treasury;
        settleSequencer = _settleSequencer;
        sealedFundingFactory = new SealedFundingFactory(address(this));
    }

    event SequencerChanged(address newSequencer, address newSettleSequencer);

    function changeSequencer(address newSequencer, address newSettleSequencer) external onlyOwner {
        require(newSequencer != address(0) && newSettleSequencer != address(0), "0x0 sequencer not allowed");
        sequencer = newSequencer;
        settleSequencer = newSettleSequencer;
        emit SequencerChanged(newSequencer, newSettleSequencer);
    }

    event ForcedWithdrawDelayChanged(uint256 newDelay);

    function changeForcedWithdrawDelay(uint256 newDelay) external onlyOwner {
        require(newDelay < 10 days, "<10 days");
        forcedWithdrawDelay = newDelay;
        emit ForcedWithdrawDelayChanged(newDelay);
    }

    event TreasuryChanged(address newTreasury);

    function changeTreasury(address payable newTreasury) external onlyOwner {
        treasury = newTreasury;
        emit TreasuryChanged(newTreasury);
    }

    event GuardianSet(address guardian, bool value);

    function setGuardian(address guardian, bool value) external onlyOwner {
        guardians[guardian] = value;
        emit GuardianSet(guardian, value);
    }

    event SequencerDisabled(address guardian);

    function emergencyDisableSequencer() external {
        require(guardians[msg.sender] == true, "not guardian");
        // Maintain the invariant that sequencers are not 0x0
        sequencer = address(0x000000000000000000000000000000000000dEaD);
        settleSequencer = address(0x000000000000000000000000000000000000dEaD);
        emit SequencerDisabled(msg.sender);
    }

    event FeeChanged(uint256 newFeeMultiplier);

    function changeFee(uint256 newFeeMultiplier) external onlyOwner {
        require(newFeeMultiplier <= MAX_PROTOCOL_FEE, "fee too high");
        feeMultiplier = newFeeMultiplier;
        emit FeeChanged(newFeeMultiplier);
    }

    function deposit(address receiver) public payable {
        _balances[receiver] += msg.value;
        emit Transfer(address(0), receiver, msg.value);
    }

    function _withdraw(uint256 amount) internal {
        _balances[msg.sender] -= amount;
        (bool success,) = payable(msg.sender).call{value: amount}("");
        require(success);
        emit Transfer(msg.sender, address(0), amount);
    }

    event WithdrawNonceUsed(uint256 nonce);

    function withdraw(WithdrawalPacket calldata packet) public {
        require(_verifyWithdrawal(packet) == sequencer, "!sequencer");
        require(nonceState(packet.nonce) == false, "replayed");
        usedNonces.set(packet.nonce);
        require(packet.account == msg.sender, "not sender");
        _withdraw(packet.amount);
        emit WithdrawNonceUsed(packet.nonce);
    }

    event StartWithdrawal(address owner, uint256 timestamp, uint256 nonce, uint256 amount);

    function startWithdrawal(uint256 amount, uint256 nonce) external {
        pendingWithdrawals[msg.sender][block.timestamp][nonce] = amount;
        emit StartWithdrawal(msg.sender, block.timestamp, nonce, amount);
    }

    event CancelWithdrawal(address owner, uint256 timestamp, uint256 nonce);

    function cancelPendingWithdrawal(uint256 timestamp, uint256 nonce) external {
        pendingWithdrawals[msg.sender][timestamp][nonce] = 0;
        emit CancelWithdrawal(msg.sender, timestamp, nonce);
    }

    event ExecuteDelayedWithdrawal(address owner, uint256 timestamp, uint256 nonce);

    function executePendingWithdrawal(uint256 timestamp, uint256 nonce) external {
        require(timestamp + forcedWithdrawDelay < block.timestamp, "too soon");
        uint256 amount = pendingWithdrawals[msg.sender][timestamp][nonce];
        pendingWithdrawals[msg.sender][timestamp][nonce] = 0;
        _withdraw(amount);
        emit ExecuteDelayedWithdrawal(msg.sender, timestamp, nonce);
    }

    function calculateAuctionHash(
        address owner,
        address nftContract,
        bytes32 auctionType,
        uint256 nftId,
        uint256 reserve
    ) public pure returns (bytes32) {
        return keccak256(abi.encode(owner, nftContract, auctionType, nftId, reserve));
    }

    event AuctionCreated(
        address owner, address nftContract, uint256 auctionDuration, bytes32 auctionType, uint256 nftId, uint256 reserve
    );

    function _createAuction(
        address nftContract,
        uint256 auctionDuration,
        bytes32 auctionType,
        uint256 nftId,
        uint256 reserve
    ) internal {
        bytes32 auctionId = calculateAuctionHash(msg.sender, nftContract, auctionType, nftId, reserve);
        require(auctionState[auctionId] == AuctionState.NONE, "repeated auction id"); // maybe this is not needed?
        auctionState[auctionId] = AuctionState.CREATED;
        emit AuctionCreated(msg.sender, nftContract, auctionDuration, auctionType, nftId, reserve);
    }

    function createAuction(
        address nftContract,
        uint256 auctionDuration,
        bytes32 auctionType,
        uint256 nftId,
        uint256 reserve
    ) external {
        IERC721(nftContract).transferFrom(msg.sender, address(this), nftId);
        _createAuction(nftContract, auctionDuration, auctionType, nftId, reserve);
    }

    event AuctionCancelled(bytes32 auctionId);

    function _cancelAuction(
        address nftContract,
        bytes32 auctionType,
        uint256 nftId,
        uint256 reserve,
        CancelAuction calldata cancelAuctionPacket
    ) internal {
        require(_verifyCancelAuction(cancelAuctionPacket) == sequencer, "!sequencer");
        bytes32 auctionId = calculateAuctionHash(msg.sender, nftContract, auctionType, nftId, reserve);
        require(auctionState[auctionId] == AuctionState.CREATED, "bad state");
        require(cancelAuctionPacket.auctionId == auctionId, "!auctionId");
        auctionState[auctionId] = AuctionState.CLOSED;
        emit AuctionCancelled(auctionId);
    }

    function cancelAuction(
        address nftContract,
        bytes32 auctionType,
        uint256 nftId,
        uint256 reserve,
        CancelAuction calldata cancelAuctionPacket
    ) external {
        _cancelAuction(nftContract, auctionType, nftId, reserve, cancelAuctionPacket);
        IERC721(nftContract).transferFrom(address(this), msg.sender, nftId);
    }

    function changeAuction(
        address nftContract,
        bytes32 auctionType,
        uint256 nftId,
        uint256 reserve,
        uint256 newAuctionDuration,
        bytes32 newAuctionType,
        uint256 newReserve,
        CancelAuction calldata cancelAuctionPacket
    ) external {
        _cancelAuction(nftContract, auctionType, nftId, reserve, cancelAuctionPacket);
        _createAuction(nftContract, newAuctionDuration, newAuctionType, nftId, newReserve);
    }

    event StartDelayedAuctionCancel(bytes32 auctionId);

    function startCancelAuction(
        address nftContract,
        bytes32 auctionType,
        uint256 nftId,
        uint256 reserve
    ) external {
        bytes32 auctionId = calculateAuctionHash(msg.sender, nftContract, auctionType, nftId, reserve);
        require(auctionState[auctionId] == AuctionState.CREATED, "bad auction state");
        pendingAuctionCancels[auctionId] = block.timestamp;
        emit StartDelayedAuctionCancel(auctionId);
    }

    event ExecuteDelayedAuctionCancel(bytes32 auctionId);

    function executeCancelAuction(
        address nftContract,
        bytes32 auctionType,
        uint256 nftId,
        uint256 reserve
    ) external {
        bytes32 auctionId = calculateAuctionHash(msg.sender, nftContract, auctionType, nftId, reserve);
        uint256 timestamp = pendingAuctionCancels[auctionId];
        require(timestamp != 0 && (timestamp + forcedWithdrawDelay) < block.timestamp, "too soon");
        require(auctionState[auctionId] == AuctionState.CREATED, "not open");
        auctionState[auctionId] = AuctionState.CLOSED;
        pendingAuctionCancels[auctionId] = 0;
        emit AuctionCancelled(auctionId);
        IERC721(nftContract).transferFrom(address(this), msg.sender, nftId);
        emit ExecuteDelayedAuctionCancel(auctionId);
    }

    function _transferETH(address payable receiver, uint256 amount) internal {
        (bool success,) = receiver.call{value: amount, gas: 300_000}("");
        if (success == false) {
            _balances[receiver] += amount;
            emit Transfer(address(0), receiver, amount);
        }
    }

    function _distributeSale(address nftContract, uint256 nftId, uint256 amount, address payable seller) internal {
        uint256 totalRoyalty = 0;
        try royaltyEngine.getRoyalty{gas: 500_000}(nftContract, nftId, amount) returns (address payable[] memory recipients, uint256[] memory amounts) {
            uint length = 5; // Use a maximum of 5 items to avoid attacks that blow up gas limit
            if(recipients.length < length){
                length = recipients.length;
            }
            if(amounts.length < length){
                length = amounts.length;
            }
            for (uint256 i; i < length;) {
                _transferETH(recipients[i], amounts[i]);
                totalRoyalty += amounts[i];
                unchecked {
                    ++i;
                }
            }
            require(totalRoyalty <= (amount / 3), "Royalty too high"); // Protect against royalty hacks
        } catch {}
        uint256 feeAmount = (amount * feeMultiplier) / 1e18;
        _transferETH(treasury, feeAmount);
        _transferETH(seller, amount - (totalRoyalty + feeAmount)); // totalRoyalty+feeAmount <= amount*0.43
    }

    event AuctionSettled(bytes32 auctionId);

    function settleAuction(
        address payable nftOwner,
        address nftContract,
        bytes32 auctionType,
        uint256 nftId,
        uint256 reserve,
        Bid calldata bid,
        BidWinner calldata bidWinner
    ) public {
        bytes32 auctionId = calculateAuctionHash(nftOwner, nftContract, auctionType, nftId, reserve);
        require(auctionState[auctionId] == AuctionState.CREATED, "bad auction state");
        auctionState[auctionId] = AuctionState.CLOSED;
        require(bidWinner.auctionId == auctionId && bid.auctionId == auctionId, "!auctionId");
        uint256 amount = bidWinner.amount;
        require(amount <= bid.maxAmount && amount >= reserve, "!amount");
        require(_verifyBid(bid) == bidWinner.winner, "!winner");
        require(_verifyBidWinner(bidWinner) == settleSequencer, "!settleSequencer");
        _balances[bidWinner.winner] -= amount;
        emit Transfer(bidWinner.winner, address(0), amount);
        IERC721(nftContract).transferFrom(address(this), bidWinner.winner, nftId);
        _distributeSale(nftContract, nftId, amount, nftOwner);
        emit AuctionSettled(auctionId);
    }

    function _revealBids(bytes32[] calldata salts, address owner) internal {
        for (uint256 i = 0; i < salts.length;) {
            // We use try/catch here to prevent a griefing attack where someone could deploySealedFunding() one of the
            // sealed fundings of the buyer right before another user calls this function, thus making it revert
            // It's still possible for the buyer to perform this attack by frontrunning the call with a withdraw()
            // but that's trivial to solve by just revealing all the salts of the griefing user
            try sealedFundingFactory.deploySealedFunding{gas: 100_000}(salts[i], owner) {} // cost of deploySealedFunding() is between 55k and 82k
                catch {}
            unchecked {
                ++i;
            }
        }
    }

    function settleAuctionWithSealedBids(
        bytes32[] calldata salts,
        address payable nftOwner,
        address nftContract,
        bytes32 auctionType,
        uint256 nftId,
        uint256 reserve,
        Bid calldata bid,
        BidWinner calldata bidWinner
    ) external {
        _revealBids(salts, bidWinner.winner);
        settleAuction(nftOwner, nftContract, auctionType, nftId, reserve, bid, bidWinner);
    }

    function withdrawWithSealedBids(bytes32[] calldata salts, WithdrawalPacket calldata packet) external {
        _revealBids(salts, msg.sender);
        withdraw(packet);
    }

    event CounterIncreased(address account, uint256 newCounter);

    function increaseCounter(uint256 newCounter) external {
        require(newCounter > accountCounter[msg.sender], "too low");
        accountCounter[msg.sender] = newCounter;
        emit CounterIncreased(msg.sender, newCounter);
    }

    event OfferCancelled(address account, uint256 nonce);

    function cancelOffer(uint256 nonce) external {
        usedOrderNonces[msg.sender].set(nonce);
        emit OfferCancelled(msg.sender, nonce);
    }

    function _verifyOffer(Offer calldata offer, address creator) private {
        require(offer.deadline > block.timestamp, "!deadline");
        require(orderNonces(creator, offer.nonce) == false, "!orderNonce");
        usedOrderNonces[msg.sender].set(offer.nonce);
        require(offer.counter > accountCounter[creator], "!counter");
    }

    event OrdersMatched(bytes32 auctionId, address buyer, address sender, uint256 buyerNonce, uint256 sellerNonce);

    function matchOrders(
        Offer calldata sellerOffer,
        Offer calldata buyerOffer,
        OfferAttestation calldata sequencerStamp,
        address nftContract,
        bytes32 auctionType,
        uint256 nftId,
        uint256 reserve
    ) external {
        // First run verifications that can fail due to a delayed tx
        require(sequencerStamp.deadline > block.timestamp, "!deadline");
        if (msg.sender != sequencerStamp.buyer) {
            _verifyOffer(buyerOffer, sequencerStamp.buyer);
            require(_verifyBuyOffer(buyerOffer) == sequencerStamp.buyer && sequencerStamp.buyer != address(0), "!buyer");
        }
        if (msg.sender != sequencerStamp.seller) {
            _verifyOffer(sellerOffer, sequencerStamp.seller);
            require(
                _verifySellOffer(sellerOffer) == sequencerStamp.seller && sequencerStamp.seller != address(0), "!seller"
            );
        }
        // Verify NFT is owned by seller
        bytes32 auctionId = calculateAuctionHash(
            sequencerStamp.seller,
            nftContract,
            auctionType,
            nftId,
            reserve
        );
        require(auctionState[auctionId] == AuctionState.CREATED && sequencerStamp.auctionId == auctionId, "bad auction state");
        // Execute sale
        _balances[sequencerStamp.buyer] -= sequencerStamp.amount;
        emit Transfer(sequencerStamp.buyer, address(0), sequencerStamp.amount);
        auctionState[auctionId] = AuctionState.CLOSED;

        // Run verifications that can't fail due to external factors
        require(sequencerStamp.amount == sellerOffer.amount && sequencerStamp.amount == buyerOffer.amount, "!amount");
        require(
            nftContract == sellerOffer.nftContract
                && nftContract == buyerOffer.nftContract,
            "!nftContract"
        );
        require(nftId == sellerOffer.nftId && nftId == buyerOffer.nftId, "!nftId");
        require(_verifyOfferAttestation(sequencerStamp) == sequencer, "!sequencer"); // This needs sequencer approval to avoid someone rugging their bids by buying another NFT

        // Finish executing sale
        IERC721(nftContract).transferFrom(address(this), sequencerStamp.buyer, nftId);
        _distributeSale(
            nftContract, nftId, sequencerStamp.amount, payable(sequencerStamp.seller)
        );
        emit OrdersMatched(auctionId, sequencerStamp.buyer, msg.sender, buyerOffer.nonce, sellerOffer.nonce);
    }

    function nonceState(uint256 nonce) public view returns (bool) {
        return usedNonces.get(nonce);
    }

    function orderNonces(address account, uint256 nonce) public view returns (bool) {
        return usedOrderNonces[account].get(nonce);
    }
}

File 2 of 7 : Ownable.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)

pragma solidity ^0.8.0;

import "../utils/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.
 */
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);
    }
}

File 3 of 7 : Context.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

/**
 * @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 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) {
        return msg.sender;
    }

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

File 4 of 7 : BitMaps.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/structs/BitMaps.sol)
pragma solidity ^0.8.0;

/**
 * @dev Library for managing uint256 to bool mapping in a compact and efficient way, providing the keys are sequential.
 * Largely inspired by Uniswap's https://github.com/Uniswap/merkle-distributor/blob/master/contracts/MerkleDistributor.sol[merkle-distributor].
 */
library BitMaps {
    struct BitMap {
        mapping(uint256 => uint256) _data;
    }

    /**
     * @dev Returns whether the bit at `index` is set.
     */
    function get(BitMap storage bitmap, uint256 index) internal view returns (bool) {
        uint256 bucket = index >> 8;
        uint256 mask = 1 << (index & 0xff);
        return bitmap._data[bucket] & mask != 0;
    }

    /**
     * @dev Sets the bit at `index` to the boolean `value`.
     */
    function setTo(BitMap storage bitmap, uint256 index, bool value) internal {
        if (value) {
            set(bitmap, index);
        } else {
            unset(bitmap, index);
        }
    }

    /**
     * @dev Sets the bit at `index`.
     */
    function set(BitMap storage bitmap, uint256 index) internal {
        uint256 bucket = index >> 8;
        uint256 mask = 1 << (index & 0xff);
        bitmap._data[bucket] |= mask;
    }

    /**
     * @dev Unsets the bit at `index`.
     */
    function unset(BitMap storage bitmap, uint256 index) internal {
        uint256 bucket = index >> 8;
        uint256 mask = 1 << (index & 0xff);
        bitmap._data[bucket] &= ~mask;
    }
}

File 5 of 7 : EIP712.sol
// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.4;

abstract contract EIP712 {
    /// -----------------------------------------------------------------------
    /// Structs
    /// -----------------------------------------------------------------------

    /// @param v Part of the ECDSA signature
    /// @param r Part of the ECDSA signature
    /// @param s Part of the ECDSA signature
    struct WithdrawalPacket {
        uint8 v;
        bytes32 r;
        bytes32 s;
        uint256 deadline;
        uint256 amount;
        uint256 nonce;
        address account;
    }

    /// -----------------------------------------------------------------------
    /// Immutable parameters
    /// -----------------------------------------------------------------------

    /// @notice The chain ID used by EIP-712
    uint256 internal immutable INITIAL_CHAIN_ID;

    /// @notice The domain separator used by EIP-712
    bytes32 internal immutable INITIAL_DOMAIN_SEPARATOR;

    /// -----------------------------------------------------------------------
    /// Constructor
    /// -----------------------------------------------------------------------

    constructor() {
        INITIAL_CHAIN_ID = block.chainid;
        INITIAL_DOMAIN_SEPARATOR = _computeDomainSeparator();
    }

    /// -----------------------------------------------------------------------
    /// Packet verification
    /// -----------------------------------------------------------------------

    function _verifySig(bytes memory data, uint8 v, bytes32 r, bytes32 s) internal virtual returns (address) {
        // verify signature
        address recoveredAddress =
            ecrecover(keccak256(abi.encodePacked("\x19\x01", DOMAIN_SEPARATOR(), keccak256(data))), v, r, s);
        return recoveredAddress;
    }

    /// @notice Verifies whether a packet is valid and returns the result.
    /// @dev The deadline, request, and signature are verified.
    /// @param packet The packet provided by the offchain data provider
    function _verifyWithdrawal(WithdrawalPacket calldata packet) internal virtual returns (address) {
        // verify deadline
        require(block.timestamp < packet.deadline, ">deadline");

        // verify signature
        address recoveredAddress = _verifySig(
            abi.encode(
                keccak256("VerifyWithdrawal(uint256 deadline,uint256 amount,uint256 nonce,address account)"),
                packet.deadline,
                packet.amount,
                packet.nonce,
                packet.account
            ),
            packet.v,
            packet.r,
            packet.s
        );
        return recoveredAddress; // Invariant: sequencer != address(0), we maintain this every time sequencer is set
    }

    struct Bid {
        uint8 v;
        bytes32 r;
        bytes32 s;
        bytes32 auctionId;
        uint256 maxAmount;
    }

    function _verifyBid(Bid calldata packet) internal virtual returns (address) {
        address recoveredAddress = _verifySig(
            abi.encode(keccak256("Bid(bytes32 auctionId,uint256 maxAmount)"), packet.auctionId, packet.maxAmount),
            packet.v,
            packet.r,
            packet.s
        );
        require(recoveredAddress != address(0), "sig");
        return recoveredAddress;
    }

    struct BidWinner {
        uint8 v;
        bytes32 r;
        bytes32 s;
        bytes32 auctionId;
        uint256 amount;
        address winner;
    }

    function _verifyBidWinner(BidWinner calldata packet) internal virtual returns (address) {
        return _verifySig(
            abi.encode(
                keccak256("BidWinner(bytes32 auctionId,uint256 amount,address winner)"),
                packet.auctionId,
                packet.amount,
                packet.winner
            ),
            packet.v,
            packet.r,
            packet.s
        );
    }

    struct CancelAuction {
        uint8 v;
        bytes32 r;
        bytes32 s;
        bytes32 auctionId;
        uint256 deadline;
    }

    function _verifyCancelAuction(CancelAuction calldata packet) internal virtual returns (address) {
        require(block.timestamp <= packet.deadline, "deadline");
        return _verifySig(
            abi.encode(
                keccak256("CancelAuction(bytes32 auctionId,uint256 deadline)"), packet.auctionId, packet.deadline
            ),
            packet.v,
            packet.r,
            packet.s
        );
    }

    struct Offer {
        uint8 v;
        bytes32 r;
        bytes32 s;
        address nftContract;
        uint256 nftId;
        uint256 amount;
        uint256 deadline;
        uint256 counter;
        uint256 nonce;
    }

    function _verifyBuyOffer(Offer calldata packet) internal virtual returns (address) {
        return _verifySig(
            abi.encode(
                keccak256(
                    "BuyOffer(address nftContract,uint256 nftId,uint256 amount,uint256 deadline,uint256 counter,uint256 nonce)"
                ),
                packet.nftContract,
                packet.nftId,
                packet.amount,
                packet.deadline,
                packet.counter,
                packet.nonce
            ),
            packet.v,
            packet.r,
            packet.s
        );
    }

    function _verifySellOffer(Offer calldata packet) internal virtual returns (address) {
        return _verifySig(
            abi.encode(
                keccak256(
                    "SellOffer(address nftContract,uint256 nftId,uint256 amount,uint256 deadline,uint256 counter,uint256 nonce)"
                ),
                packet.nftContract,
                packet.nftId,
                packet.amount,
                packet.deadline,
                packet.counter,
                packet.nonce
            ),
            packet.v,
            packet.r,
            packet.s
        );
    }

    struct OfferAttestation {
        uint8 v;
        bytes32 r;
        bytes32 s;
        bytes32 auctionId;
        uint256 amount;
        address buyer;
        address seller;
        uint256 deadline;
    }

    function _verifyOfferAttestation(OfferAttestation calldata packet) internal virtual returns (address) {
        return _verifySig(
            abi.encode(
                keccak256(
                    "OfferAttestation(bytes32 auctionId,uint256 amount,address buyer,address seller,uint256 deadline)"
                ),
                packet.auctionId,
                packet.amount,
                packet.buyer,
                packet.seller,
                packet.deadline
            ),
            packet.v,
            packet.r,
            packet.s
        );
    }

    /// -----------------------------------------------------------------------
    /// EIP-712 compliance
    /// -----------------------------------------------------------------------

    /// @notice The domain separator used by EIP-712
    function DOMAIN_SEPARATOR() public view virtual returns (bytes32) {
        return block.chainid == INITIAL_CHAIN_ID ? INITIAL_DOMAIN_SEPARATOR : _computeDomainSeparator();
    }

    /// @notice Computes the domain separator used by EIP-712
    function _computeDomainSeparator() internal view virtual returns (bytes32) {
        return keccak256(
            abi.encode(
                keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"),
                keccak256("SealedArtMarket"),
                keccak256("1"),
                block.chainid,
                address(this)
            )
        );
    }
}

File 6 of 7 : SealedFunding.sol
pragma solidity ^0.8.7;

interface IExchange {
    function deposit(address receiver) external payable;
}

contract SealedFunding {
    constructor(address _owner, address _exchange) {
        IExchange(_exchange).deposit{value: address(this).balance}(_owner);
        assembly {
            // Ensures the runtime bytecode is a single opcode: `INVALID`. This reduces contract
            // deploy costs & ensures that no one can accidentally send ETH to the contract once
            // deployed.
            mstore8(0, 0xfe)
            return(0, 1)
        }
    }
}

File 7 of 7 : SealedFundingFactory.sol
pragma solidity ^0.8.7;

import "./SealedFunding.sol";

contract SealedFundingFactory {
    address public immutable exchange;

    constructor(address _exchange) {
        exchange = _exchange;
    }

    event SealedFundingRevealed(bytes32 salt, address owner);

    function deploySealedFunding(bytes32 salt, address owner) public {
        new SealedFunding{salt: salt}(owner, exchange);
        emit SealedFundingRevealed(salt, owner);
    }

    function computeSealedFundingAddress(bytes32 salt, address owner)
        external
        view
        returns (address predictedAddress, bool isDeployed)
    {
        predictedAddress = address(
            uint160(
                uint256(
                    keccak256(
                        abi.encodePacked(
                            bytes1(0xff),
                            address(this),
                            salt,
                            keccak256(abi.encodePacked(type(SealedFunding).creationCode, abi.encode(owner, exchange)))
                        )
                    )
                )
            )
        );
        isDeployed = predictedAddress.code.length != 0;
    }
}

Settings
{
  "optimizer": {
    "enabled": true,
    "runs": 4294967
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

Contract Security Audit

Contract ABI

[{"inputs":[{"internalType":"address","name":"_sequencer","type":"address"},{"internalType":"address payable","name":"_treasury","type":"address"},{"internalType":"address","name":"_settleSequencer","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"bytes32","name":"auctionId","type":"bytes32"}],"name":"AuctionCancelled","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"owner","type":"address"},{"indexed":false,"internalType":"address","name":"nftContract","type":"address"},{"indexed":false,"internalType":"uint256","name":"auctionDuration","type":"uint256"},{"indexed":false,"internalType":"bytes32","name":"auctionType","type":"bytes32"},{"indexed":false,"internalType":"uint256","name":"nftId","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"reserve","type":"uint256"}],"name":"AuctionCreated","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"bytes32","name":"auctionId","type":"bytes32"}],"name":"AuctionSettled","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"owner","type":"address"},{"indexed":false,"internalType":"uint256","name":"timestamp","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"nonce","type":"uint256"}],"name":"CancelWithdrawal","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"account","type":"address"},{"indexed":false,"internalType":"uint256","name":"newCounter","type":"uint256"}],"name":"CounterIncreased","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"bytes32","name":"auctionId","type":"bytes32"}],"name":"ExecuteDelayedAuctionCancel","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"owner","type":"address"},{"indexed":false,"internalType":"uint256","name":"timestamp","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"nonce","type":"uint256"}],"name":"ExecuteDelayedWithdrawal","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"newFeeMultiplier","type":"uint256"}],"name":"FeeChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"newDelay","type":"uint256"}],"name":"ForcedWithdrawDelayChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"guardian","type":"address"},{"indexed":false,"internalType":"bool","name":"value","type":"bool"}],"name":"GuardianSet","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"account","type":"address"},{"indexed":false,"internalType":"uint256","name":"nonce","type":"uint256"}],"name":"OfferCancelled","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"bytes32","name":"auctionId","type":"bytes32"},{"indexed":false,"internalType":"address","name":"buyer","type":"address"},{"indexed":false,"internalType":"address","name":"sender","type":"address"},{"indexed":false,"internalType":"uint256","name":"buyerNonce","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"sellerNonce","type":"uint256"}],"name":"OrdersMatched","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":false,"internalType":"address","name":"newSequencer","type":"address"},{"indexed":false,"internalType":"address","name":"newSettleSequencer","type":"address"}],"name":"SequencerChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"guardian","type":"address"}],"name":"SequencerDisabled","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"bytes32","name":"auctionId","type":"bytes32"}],"name":"StartDelayedAuctionCancel","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"owner","type":"address"},{"indexed":false,"internalType":"uint256","name":"timestamp","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"nonce","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"StartWithdrawal","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Transfer","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"newTreasury","type":"address"}],"name":"TreasuryChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"nonce","type":"uint256"}],"name":"WithdrawNonceUsed","type":"event"},{"inputs":[],"name":"DOMAIN_SEPARATOR","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"accountCounter","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"name":"auctionState","outputs":[{"internalType":"enum SealedArtMarket.AuctionState","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"nftContract","type":"address"},{"internalType":"bytes32","name":"auctionType","type":"bytes32"},{"internalType":"uint256","name":"nftId","type":"uint256"},{"internalType":"uint256","name":"reserve","type":"uint256"}],"name":"calculateAuctionHash","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"address","name":"nftContract","type":"address"},{"internalType":"bytes32","name":"auctionType","type":"bytes32"},{"internalType":"uint256","name":"nftId","type":"uint256"},{"internalType":"uint256","name":"reserve","type":"uint256"},{"components":[{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"},{"internalType":"bytes32","name":"auctionId","type":"bytes32"},{"internalType":"uint256","name":"deadline","type":"uint256"}],"internalType":"struct EIP712.CancelAuction","name":"cancelAuctionPacket","type":"tuple"}],"name":"cancelAuction","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"nonce","type":"uint256"}],"name":"cancelOffer","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"timestamp","type":"uint256"},{"internalType":"uint256","name":"nonce","type":"uint256"}],"name":"cancelPendingWithdrawal","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"nftContract","type":"address"},{"internalType":"bytes32","name":"auctionType","type":"bytes32"},{"internalType":"uint256","name":"nftId","type":"uint256"},{"internalType":"uint256","name":"reserve","type":"uint256"},{"internalType":"uint256","name":"newAuctionDuration","type":"uint256"},{"internalType":"bytes32","name":"newAuctionType","type":"bytes32"},{"internalType":"uint256","name":"newReserve","type":"uint256"},{"components":[{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"},{"internalType":"bytes32","name":"auctionId","type":"bytes32"},{"internalType":"uint256","name":"deadline","type":"uint256"}],"internalType":"struct EIP712.CancelAuction","name":"cancelAuctionPacket","type":"tuple"}],"name":"changeAuction","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"newFeeMultiplier","type":"uint256"}],"name":"changeFee","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"newDelay","type":"uint256"}],"name":"changeForcedWithdrawDelay","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newSequencer","type":"address"},{"internalType":"address","name":"newSettleSequencer","type":"address"}],"name":"changeSequencer","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address payable","name":"newTreasury","type":"address"}],"name":"changeTreasury","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"nftContract","type":"address"},{"internalType":"uint256","name":"auctionDuration","type":"uint256"},{"internalType":"bytes32","name":"auctionType","type":"bytes32"},{"internalType":"uint256","name":"nftId","type":"uint256"},{"internalType":"uint256","name":"reserve","type":"uint256"}],"name":"createAuction","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"receiver","type":"address"}],"name":"deposit","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"emergencyDisableSequencer","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"nftContract","type":"address"},{"internalType":"bytes32","name":"auctionType","type":"bytes32"},{"internalType":"uint256","name":"nftId","type":"uint256"},{"internalType":"uint256","name":"reserve","type":"uint256"}],"name":"executeCancelAuction","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"timestamp","type":"uint256"},{"internalType":"uint256","name":"nonce","type":"uint256"}],"name":"executePendingWithdrawal","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"feeMultiplier","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"forcedWithdrawDelay","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"guardians","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"newCounter","type":"uint256"}],"name":"increaseCounter","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"components":[{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"},{"internalType":"address","name":"nftContract","type":"address"},{"internalType":"uint256","name":"nftId","type":"uint256"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"uint256","name":"counter","type":"uint256"},{"internalType":"uint256","name":"nonce","type":"uint256"}],"internalType":"struct EIP712.Offer","name":"sellerOffer","type":"tuple"},{"components":[{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"},{"internalType":"address","name":"nftContract","type":"address"},{"internalType":"uint256","name":"nftId","type":"uint256"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"uint256","name":"counter","type":"uint256"},{"internalType":"uint256","name":"nonce","type":"uint256"}],"internalType":"struct EIP712.Offer","name":"buyerOffer","type":"tuple"},{"components":[{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"},{"internalType":"bytes32","name":"auctionId","type":"bytes32"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"address","name":"buyer","type":"address"},{"internalType":"address","name":"seller","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"}],"internalType":"struct EIP712.OfferAttestation","name":"sequencerStamp","type":"tuple"},{"internalType":"address","name":"nftContract","type":"address"},{"internalType":"bytes32","name":"auctionType","type":"bytes32"},{"internalType":"uint256","name":"nftId","type":"uint256"},{"internalType":"uint256","name":"reserve","type":"uint256"}],"name":"matchOrders","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"nonce","type":"uint256"}],"name":"nonceState","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"uint256","name":"nonce","type":"uint256"}],"name":"orderNonces","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"name":"pendingAuctionCancels","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"uint256","name":"","type":"uint256"}],"name":"pendingWithdrawals","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"royaltyEngine","outputs":[{"internalType":"contract RoyaltyEngine","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"sealedFundingFactory","outputs":[{"internalType":"contract SealedFundingFactory","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"sequencer","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"guardian","type":"address"},{"internalType":"bool","name":"value","type":"bool"}],"name":"setGuardian","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address payable","name":"nftOwner","type":"address"},{"internalType":"address","name":"nftContract","type":"address"},{"internalType":"bytes32","name":"auctionType","type":"bytes32"},{"internalType":"uint256","name":"nftId","type":"uint256"},{"internalType":"uint256","name":"reserve","type":"uint256"},{"components":[{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"},{"internalType":"bytes32","name":"auctionId","type":"bytes32"},{"internalType":"uint256","name":"maxAmount","type":"uint256"}],"internalType":"struct EIP712.Bid","name":"bid","type":"tuple"},{"components":[{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"},{"internalType":"bytes32","name":"auctionId","type":"bytes32"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"address","name":"winner","type":"address"}],"internalType":"struct EIP712.BidWinner","name":"bidWinner","type":"tuple"}],"name":"settleAuction","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32[]","name":"salts","type":"bytes32[]"},{"internalType":"address payable","name":"nftOwner","type":"address"},{"internalType":"address","name":"nftContract","type":"address"},{"internalType":"bytes32","name":"auctionType","type":"bytes32"},{"internalType":"uint256","name":"nftId","type":"uint256"},{"internalType":"uint256","name":"reserve","type":"uint256"},{"components":[{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"},{"internalType":"bytes32","name":"auctionId","type":"bytes32"},{"internalType":"uint256","name":"maxAmount","type":"uint256"}],"internalType":"struct EIP712.Bid","name":"bid","type":"tuple"},{"components":[{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"},{"internalType":"bytes32","name":"auctionId","type":"bytes32"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"address","name":"winner","type":"address"}],"internalType":"struct EIP712.BidWinner","name":"bidWinner","type":"tuple"}],"name":"settleAuctionWithSealedBids","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"settleSequencer","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"nftContract","type":"address"},{"internalType":"bytes32","name":"auctionType","type":"bytes32"},{"internalType":"uint256","name":"nftId","type":"uint256"},{"internalType":"uint256","name":"reserve","type":"uint256"}],"name":"startCancelAuction","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"nonce","type":"uint256"}],"name":"startWithdrawal","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"treasury","outputs":[{"internalType":"address payable","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"components":[{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"nonce","type":"uint256"},{"internalType":"address","name":"account","type":"address"}],"internalType":"struct EIP712.WithdrawalPacket","name":"packet","type":"tuple"}],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32[]","name":"salts","type":"bytes32[]"},{"components":[{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"nonce","type":"uint256"},{"internalType":"address","name":"account","type":"address"}],"internalType":"struct EIP712.WithdrawalPacket","name":"packet","type":"tuple"}],"name":"withdrawWithSealedBids","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)

000000000000000000000000ca2a693a03b49bbc3a25ae7ccc3c36335235eeac000000000000000000000000ca2a693a03b49bbc3a25ae7ccc3c36335235eeac000000000000000000000000ca2a693a03b49bbc3a25ae7ccc3c36335235eeac

-----Decoded View---------------
Arg [0] : _sequencer (address): 0xcA2A693A03b49bBc3A25AE7cCc3c36335235Eeac
Arg [1] : _treasury (address): 0xcA2A693A03b49bBc3A25AE7cCc3c36335235Eeac
Arg [2] : _settleSequencer (address): 0xcA2A693A03b49bBc3A25AE7cCc3c36335235Eeac

-----Encoded View---------------
3 Constructor Arguments found :
Arg [0] : 000000000000000000000000ca2a693a03b49bbc3a25ae7ccc3c36335235eeac
Arg [1] : 000000000000000000000000ca2a693a03b49bbc3a25ae7ccc3c36335235eeac
Arg [2] : 000000000000000000000000ca2a693a03b49bbc3a25ae7ccc3c36335235eeac


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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.