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• interface IERC165
•    - function supportsInterface(bytes4 int ...
•  contract ERC165 is IERC165
•    - function supportsInterface(bytes4 int ...
•    - function _registerInterface(bytes4 in ...
• interface IERC20
•    - function totalSupply()
•    - function balanceOf(address account)
•    - function transfer(address recipient, ...
•    - function allowance(address owner, add ...
•    - function approve(address spender, uin ...
•    - function transferFrom(address sender, ...
• interface IERC721 is IERC165
•    - function balanceOf(address owner)
•    - function ownerOf(uint256 tokenId)
•    - function safeTransferFrom(address fro ...
•    - function transferFrom(address from, a ...
•    - function approve(address to, uint256 ...
•    - function getApproved(uint256 tokenId)
•    - function setApprovalForAll(address op ...
•    - function isApprovedForAll(address own ...
•    - function safeTransferFrom(address fro ...
•    - function onERC721Received(address ope ...
• library SafeMath
•    - function add(uint256 a, uint256 b)
•    - function sub(uint256 a, uint256 b)
•    - function sub(uint256 a, uint256 b, st ...
•    - function mul(uint256 a, uint256 b)
•    - function div(uint256 a, uint256 b)
•    - function div(uint256 a, uint256 b, st ...
•    - function mod(uint256 a, uint256 b)
•    - function mod(uint256 a, uint256 b, st ...
• interface ENSRegistryOwnerI
•    - function owner(bytes32 node)
• interface ENSReverseRegistrarI
•    - function setName(string calldata name ...
• interface CollectionsI is IERC721
•    - function create(address _notification ...
•    - function createFor(address payable _n ...
•    - function burn(uint256 tokenId)
•    - function exists(uint256 tokenId)
•    - function isApprovedOrOwner(address sp ...
•    - function collectionAddress(uint256 to ...
•    - function tokenIdForCollection(address ...
•    - function exists(uint256 tokenId)
•    - function signedTransfer(uint256 _toke ...
•    - function signedTransferWithOperator(u ...
•    - function signedTransferWithMintProof( ...
•    - function signedTransferWithOperatorAn ...
•  contract CS2SwipeCollectionHelper ... *
•    - function transferTokenAssignmentContr ...
•    - function createCollectionWithToken(
•    - function createCollectionWithTokenAnd ...
•    - function _createCollection(
•    - function onERC721Received(address _op ...
•    - function registerReverseENS(address _ ...
•    - function rescueToken(address _foreign ...
•    - function approveNFTrescue(IERC721 _fo ...

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/**
 *Submitted for verification at Etherscan.io on 2020-07-22
*/

/*
 * Crypto stamp 2 Swipe Collection Helper
 * Helper contract to allow creating a Collection
 * and transfering a Crypto stamp into it in one transaction
 *
 * Developed by Capacity Blockchain Solutions GmbH <capacity.at>
 * for Österreichische Post AG <post.at>
 */


// File: @openzeppelin/contracts/introspection/IERC165.sol

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: @openzeppelin/contracts/introspection/ERC165.sol

pragma solidity ^0.6.0;


/**
 * @dev Implementation of the {IERC165} interface.
 *
 * Contracts may inherit from this and call {_registerInterface} to declare
 * their support of an interface.
 */
contract ERC165 is IERC165 {
    /*
     * bytes4(keccak256('supportsInterface(bytes4)')) == 0x01ffc9a7
     */
    bytes4 private constant _INTERFACE_ID_ERC165 = 0x01ffc9a7;

    /**
     * @dev Mapping of interface ids to whether or not it's supported.
     */
    mapping(bytes4 => bool) private _supportedInterfaces;

    constructor () internal {
        // Derived contracts need only register support for their own interfaces,
        // we register support for ERC165 itself here
        _registerInterface(_INTERFACE_ID_ERC165);
    }

    /**
     * @dev See {IERC165-supportsInterface}.
     *
     * Time complexity O(1), guaranteed to always use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) public view override returns (bool) {
        return _supportedInterfaces[interfaceId];
    }

    /**
     * @dev Registers the contract as an implementer of the interface defined by
     * `interfaceId`. Support of the actual ERC165 interface is automatic and
     * registering its interface id is not required.
     *
     * See {IERC165-supportsInterface}.
     *
     * Requirements:
     *
     * - `interfaceId` cannot be the ERC165 invalid interface (`0xffffffff`).
     */
    function _registerInterface(bytes4 interfaceId) internal virtual {
        require(interfaceId != 0xffffffff, "ERC165: invalid interface id");
        _supportedInterfaces[interfaceId] = true;
    }
}

// File: @openzeppelin/contracts/token/ERC20/IERC20.sol

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: @openzeppelin/contracts/token/ERC721/IERC721.sol

pragma solidity ^0.6.2;


/**
 * @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`, `to` cannot be zero.
     * - `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`, `to` cannot be zero.
     * - `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`, `to` cannot be zero.
      * - `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: @openzeppelin/contracts/token/ERC721/IERC721Receiver.sol

pragma solidity ^0.6.0;

/**
 * @title ERC721 token receiver interface
 * @dev Interface for any contract that wants to support safeTransfers
 * from ERC721 asset contracts.
 */
abstract contract IERC721Receiver {
    /**
     * @notice Handle the receipt of an NFT
     * @dev The ERC721 smart contract calls this function on the recipient
     * after a {IERC721-safeTransferFrom}. This function MUST return the function selector,
     * otherwise the caller will revert the transaction. The selector to be
     * returned can be obtained as `this.onERC721Received.selector`. This
     * function MAY throw to revert and reject the transfer.
     * Note: the ERC721 contract address is always the message sender.
     * @param operator The address which called `safeTransferFrom` function
     * @param from The address which previously owned the token
     * @param tokenId The NFT identifier which is being transferred
     * @param data Additional data with no specified format
     * @return bytes4 `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`
     */
    function onERC721Received(address operator, address from, uint256 tokenId, bytes memory data)
    public virtual returns (bytes4);
}

// File: @openzeppelin/contracts/math/SafeMath.sol

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) {
        // Solidity only automatically asserts when dividing by 0
        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: contracts/ENSReverseRegistrarI.sol

/*
 * Interfaces for ENS Reverse Registrar
 * See https://github.com/ensdomains/ens/blob/master/contracts/ReverseRegistrar.sol for full impl
 * Also see https://github.com/wealdtech/wealdtech-solidity/blob/master/contracts/ens/ENSReverseRegister.sol
 *
 * Use this as follows (registryAddress is the address of the ENS registry to use):
 * -----
 * // This hex value is caclulated by namehash('addr.reverse')
 * bytes32 public constant ENS_ADDR_REVERSE_NODE = 0x91d1777781884d03a6757a803996e38de2a42967fb37eeaca72729271025a9e2;
 * function registerReverseENS(address registryAddress, string memory calldata) external {
 *     require(registryAddress != address(0), "need a valid registry");
 *     address reverseRegistrarAddress = ENSRegistryOwnerI(registryAddress).owner(ENS_ADDR_REVERSE_NODE)
 *     require(reverseRegistrarAddress != address(0), "need a valid reverse registrar");
 *     ENSReverseRegistrarI(reverseRegistrarAddress).setName(name);
 * }
 * -----
 * or
 * -----
 * function registerReverseENS(address reverseRegistrarAddress, string memory calldata) external {
 *    require(reverseRegistrarAddress != address(0), "need a valid reverse registrar");
 *     ENSReverseRegistrarI(reverseRegistrarAddress).setName(name);
 * }
 * -----
 * ENS deployments can be found at https://docs.ens.domains/ens-deployments
 * E.g. Etherscan can be used to look up that owner on those contracts.
 * namehash.hash("addr.reverse") == "0x91d1777781884d03a6757a803996e38de2a42967fb37eeaca72729271025a9e2"
 * Ropsten: ens.owner(namehash.hash("addr.reverse")) == "0x6F628b68b30Dc3c17f345c9dbBb1E483c2b7aE5c"
 * Mainnet: ens.owner(namehash.hash("addr.reverse")) == "0x084b1c3C81545d370f3634392De611CaaBFf8148"
 */
pragma solidity ^0.6.0;

interface ENSRegistryOwnerI {
    function owner(bytes32 node) external view returns (address);
}

interface ENSReverseRegistrarI {
    function setName(string calldata name) external returns (bytes32 node);
}

// File: contracts/CollectionsI.sol

pragma solidity ^0.6.0;


/**
 * @dev Outward-facing interface of a Collections contract.
 */
interface CollectionsI is IERC721 {
    event NewCollection(address indexed owner, address collectionAddress);

    /**
     * @dev Creates a new Collection.
     */
    function create(address _notificationContract,
                    string calldata _ensName,
                    string calldata _ensSubdomainName,
                    address _ensSubdomainRegistrarAddress,
                    address _ensReverseRegistrarAddress)
    external;

    /**
     * @dev Create a collection for a different owner. Only callable by a create controller role.
     */
    function createFor(address payable _newOwner,
                       address _notificationContract,
                       string calldata _ensName,
                       string calldata _ensSubdomainName,
                       address _ensSubdomainRegistrarAddress,
                       address _ensReverseRegistrarAddress)
    external payable;

    /**
     * @dev Removes (burns) an empty Collection. Only the Collection contract itself can call this.
     */
    function burn(uint256 tokenId) external;

    /**
     * @dev Returns if a Collection NFT exists for the specified `tokenId`.
     */
    function exists(uint256 tokenId) external view returns (bool);

    /**
     * @dev Returns whether the given spender can transfer a given `tokenId`.
     */
    function isApprovedOrOwner(address spender, uint256 tokenId) external view returns (bool);

    /**
     * @dev Returns the Collection address for a token ID.
     */
    function collectionAddress(uint256 tokenId) external view returns (address);

    /**
     * @dev Returns the token ID for a Collection address.
     */
    function tokenIdForCollection(address collectionAddr) external view returns (uint256 tokenId);
}

// File: contracts/ERC721ExistsI.sol

pragma solidity ^0.6.0;


/**
 * @dev ERC721 compliant contract with an exists() function.
 */
abstract contract ERC721ExistsI is IERC721 {

    // Returns whether the specified token exists
    function exists(uint256 tokenId) public view virtual returns (bool);

}

// File: contracts/CS2SignedTransferI.sol

pragma solidity ^0.6.0;


/**
 * @dev ERC721 compliant contract with an exists() function.
 */
abstract contract CS2SignedTransferI is ERC721ExistsI {

    // Outward-facing function for signed transfer: assembles the expected data and then calls the internal function to do the rest.
    // Can called by anyone knowing about the right signature, but can only transfer to the given specific target.
    function signedTransfer(uint256 _tokenId, address _to, bytes memory _signature) external virtual;

    // Outward-facing function for operator-driven signed transfer: assembles the expected data and then calls the internal function to do the rest.
    // Can transfer to any target, but only be called by the trusted operator contained in the signature.
    function signedTransferWithOperator(uint256 _tokenId, address _to, bytes memory _signature) external virtual;

    // Mint token and transfer it in the same transaction.
    // Can called by anyone knowing about the right signature (and proof), but can only transfer to the given specific target.
    function signedTransferWithMintProof(bytes32 tokenData, address _to, bytes calldata _signature, bytes32[] calldata merkleProof) external virtual;

    // Mint token and transfer it in the same transaction.
    // Can transfer to any target, but only be called by the trusted operator contained in the signature.
    function signedTransferWithOperatorAndMintProof(bytes32 tokenData, address _to, bytes calldata _signature, bytes32[] calldata merkleProof) external virtual;

}

// File: contracts/CS2SwipeCollectionHelper.sol

/*
 * Helper for CS2 contract connecting to Achievements
 */
pragma solidity ^0.6.0;









contract CS2SwipeCollectionHelper is ERC165, IERC721Receiver {
    using SafeMath for uint256;

    bytes4 private constant _ERC721_RECEIVED = 0x150b7a02;

    address public tokenAssignmentControl;

    CollectionsI public collections;
    uint256 public inFlightCollectionId;

    event TokenAssignmentControlTransferred(address indexed previousTokenAssignmentControl, address indexed newTokenAssignmentControl);
    // ERC721 event - never emitted in this contract but helpful for running our tests.
    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
    // CS2/CSGU and TestCS2 events - never emitted in this contract but helpful for running our tests.
    event TestMintedWithProof(address operator, uint256 indexed tokenId, address indexed owner);
    event SignedTransfer(address operator, address indexed from, address indexed to, uint256 indexed tokenId, uint256 signedTransferNonce);
    // Collections event - never emitted in this contract but helpful for running our tests.
    event NewCollection(address indexed owner, address collectionAddress);

    constructor(address _collectionsAddress, address _tokenAssignmentControl)
    public
    {
        _registerInterface(_ERC721_RECEIVED);
        collections = CollectionsI(_collectionsAddress);
        require(address(collections) != address(0x0), "You need to provide an actual Collections contract.");
        tokenAssignmentControl = _tokenAssignmentControl;
        require(tokenAssignmentControl != address(0), "tokenAssignmentControl cannot be the zero address.");
    }

    modifier onlyTokenAssignmentControl() {
        require(msg.sender == tokenAssignmentControl, "tokenAssignmentControl key required for this function.");
        _;
    }

    /*** Enable adjusting variables after deployment ***/

    function transferTokenAssignmentControl(address _newTokenAssignmentControl)
    public
    onlyTokenAssignmentControl
    {
        require(_newTokenAssignmentControl != address(0), "tokenAssignmentControl cannot be the zero address.");
        emit TokenAssignmentControlTransferred(tokenAssignmentControl, _newTokenAssignmentControl);
        tokenAssignmentControl = _newTokenAssignmentControl;
    }

    /*** Helper for creating a new collection and fundedTransfer of CS2/CSGU in the same transaction  ***/

    function createCollectionWithToken(
        address _newOwner,
        address _notificationContract,
        string memory _ensName,
        string memory _ensSubdomainName,
        address _ensSubdomainRegistrarAddress,
        address _ensReverseRegistrarAddress,
        address _tokenContractAddress,
        uint256 _tokenId,
        bytes memory _signature
    )
    public
    {
        require(address(_tokenContractAddress) != address(0x0), "You need to provide an actual Crypto stamp token contract.");
        CS2SignedTransferI cstoken = CS2SignedTransferI(_tokenContractAddress);
        address collectionAddress = _createCollection(_newOwner, _notificationContract, _ensName, _ensSubdomainName, _ensSubdomainRegistrarAddress, _ensReverseRegistrarAddress);
        cstoken.signedTransferWithOperator(_tokenId, collectionAddress, _signature);
    }

    function createCollectionWithTokenAndMintProof(
        address _newOwner,
        address _notificationContract,
        string memory _ensName,
        string memory _ensSubdomainName,
        address _ensSubdomainRegistrarAddress,
        address _ensReverseRegistrarAddress,
        address _tokenContractAddress,
        bytes32 tokenData,
        bytes calldata _signature,
        bytes32[] calldata merkleProof
    )
    public
    {
        require(address(_tokenContractAddress) != address(0x0), "You need to provide an actual Crypto stamp token contract.");
        CS2SignedTransferI cstoken = CS2SignedTransferI(_tokenContractAddress);
        address collectionAddress = _createCollection(_newOwner, _notificationContract, _ensName, _ensSubdomainName, _ensSubdomainRegistrarAddress, _ensReverseRegistrarAddress);
        cstoken.signedTransferWithOperatorAndMintProof(tokenData, collectionAddress, _signature, merkleProof);
    }

    function _createCollection(
        address _newOwner,
        address _notificationContract,
        string memory _ensName,
        string memory _ensSubdomainName,
        address _ensSubdomainRegistrarAddress,
        address _ensReverseRegistrarAddress
    )
    internal
    returns (address)
    {
        inFlightCollectionId = 0;
        collections.create(_notificationContract, _ensName, _ensSubdomainName, _ensSubdomainRegistrarAddress, _ensReverseRegistrarAddress);
        require(inFlightCollectionId > 0, "Temporary ID store did not work!");
        address collection_address = collections.collectionAddress(inFlightCollectionId);
        // alternative without inFlightCollection hack: address collection_address = ens_resolver.addr(ens_node);
        collections.safeTransferFrom(address(this), _newOwner, inFlightCollectionId);
        inFlightCollectionId = 0;
        return collection_address;
    }

    // Only allow receiving when we are the operator ourselves.
    function onERC721Received(address _operator, address /*_from*/, uint256 _tokenId, bytes memory /*_data*/)
    public override
    returns (bytes4)
    {
        require(_operator == address(this), "onERC721Received operator needs to be ourselves!");
        inFlightCollectionId = _tokenId;
        return this.onERC721Received.selector;
    }

    /*** Enable reverse ENS registration ***/

    // Call this with the address of the reverse registrar for the respecitve network and the ENS name to register.
    // The reverse registrar can be found as the owner of 'addr.reverse' in the ENS system.
    // See https://docs.ens.domains/ens-deployments for address of ENS deployments, e.g. Etherscan can be used to look up that owner on those.
    // namehash.hash("addr.reverse") == "0x91d1777781884d03a6757a803996e38de2a42967fb37eeaca72729271025a9e2"
    // Ropsten: ens.owner(namehash.hash("addr.reverse")) == "0x6F628b68b30Dc3c17f345c9dbBb1E483c2b7aE5c"
    // Mainnet: ens.owner(namehash.hash("addr.reverse")) == "0x084b1c3C81545d370f3634392De611CaaBFf8148"
    function registerReverseENS(address _reverseRegistrarAddress, string calldata _name)
    external
    onlyTokenAssignmentControl
    {
       require(_reverseRegistrarAddress != address(0), "need a valid reverse registrar");
       ENSReverseRegistrarI(_reverseRegistrarAddress).setName(_name);
    }

    /*** Make sure currency or NFT doesn't get stranded in this contract ***/

    // If this contract gets a balance in some ERC20 contract after it's finished, then we can rescue it.
    function rescueToken(address _foreignToken, address _to)
    external
    onlyTokenAssignmentControl
    {
        IERC20 erc20Token = IERC20(_foreignToken);
        erc20Token.transfer(_to, erc20Token.balanceOf(address(this)));
    }

    // If this contract gets a balance in some ERC721 contract after it's finished, then we can rescue it.
    function approveNFTrescue(IERC721 _foreignNFT, address _to)
    external
    onlyTokenAssignmentControl
    {
        _foreignNFT.setApprovalForAll(_to, true);
    }

}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[{"internalType":"address","name":"_collectionsAddress","type":"address"},{"internalType":"address","name":"_tokenAssignmentControl","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":false,"internalType":"address","name":"collectionAddress","type":"address"}],"name":"NewCollection","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"operator","type":"address"},{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"signedTransferNonce","type":"uint256"}],"name":"SignedTransfer","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"operator","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"},{"indexed":true,"internalType":"address","name":"owner","type":"address"}],"name":"TestMintedWithProof","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousTokenAssignmentControl","type":"address"},{"indexed":true,"internalType":"address","name":"newTokenAssignmentControl","type":"address"}],"name":"TokenAssignmentControlTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"Transfer","type":"event"},{"inputs":[{"internalType":"contract IERC721","name":"_foreignNFT","type":"address"},{"internalType":"address","name":"_to","type":"address"}],"name":"approveNFTrescue","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"collections","outputs":[{"internalType":"contract CollectionsI","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_newOwner","type":"address"},{"internalType":"address","name":"_notificationContract","type":"address"},{"internalType":"string","name":"_ensName","type":"string"},{"internalType":"string","name":"_ensSubdomainName","type":"string"},{"internalType":"address","name":"_ensSubdomainRegistrarAddress","type":"address"},{"internalType":"address","name":"_ensReverseRegistrarAddress","type":"address"},{"internalType":"address","name":"_tokenContractAddress","type":"address"},{"internalType":"uint256","name":"_tokenId","type":"uint256"},{"internalType":"bytes","name":"_signature","type":"bytes"}],"name":"createCollectionWithToken","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_newOwner","type":"address"},{"internalType":"address","name":"_notificationContract","type":"address"},{"internalType":"string","name":"_ensName","type":"string"},{"internalType":"string","name":"_ensSubdomainName","type":"string"},{"internalType":"address","name":"_ensSubdomainRegistrarAddress","type":"address"},{"internalType":"address","name":"_ensReverseRegistrarAddress","type":"address"},{"internalType":"address","name":"_tokenContractAddress","type":"address"},{"internalType":"bytes32","name":"tokenData","type":"bytes32"},{"internalType":"bytes","name":"_signature","type":"bytes"},{"internalType":"bytes32[]","name":"merkleProof","type":"bytes32[]"}],"name":"createCollectionWithTokenAndMintProof","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"inFlightCollectionId","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_operator","type":"address"},{"internalType":"address","name":"","type":"address"},{"internalType":"uint256","name":"_tokenId","type":"uint256"},{"internalType":"bytes","name":"","type":"bytes"}],"name":"onERC721Received","outputs":[{"internalType":"bytes4","name":"","type":"bytes4"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_reverseRegistrarAddress","type":"address"},{"internalType":"string","name":"_name","type":"string"}],"name":"registerReverseENS","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_foreignToken","type":"address"},{"internalType":"address","name":"_to","type":"address"}],"name":"rescueToken","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes4","name":"interfaceId","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"tokenAssignmentControl","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_newTokenAssignmentControl","type":"address"}],"name":"transferTokenAssignmentControl","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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000000000000000000000000574317b5167521d2e3e34469a6993102fbbd92ed000000000000000000000000596e620e175c2c37a5f35a41d9f2305a991ffc89

-----Decoded View---------------
Arg [0] : _collectionsAddress (address): 0x574317b5167521d2E3E34469a6993102FBbd92ed
Arg [1] : _tokenAssignmentControl (address): 0x596E620E175C2C37A5f35A41d9F2305A991fFc89

-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 000000000000000000000000574317b5167521d2e3e34469a6993102fbbd92ed
Arg [1] : 000000000000000000000000596e620e175c2c37a5f35a41d9f2305a991ffc89

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