// File: contracts/Seller.sol



// SPDX-License-Identifier: MIT
pragma solidity >=0.8.4;

import "./Collection.sol";
import "./Store.sol";
import "./utils/Structs.sol";

contract Seller is Stoppable {
  Store store;

  mapping(address => mapping(uint256 => mapping(address => uint256)))
    public presaleTokens;

  mapping(address => uint256) balance;
  mapping(address => uint256) lastTokenId;
  mapping(address => mapping(uint256 => uint256)) public sold;

  event Withdraw(address collection, address owner, uint256 balance);

  event PaymentReceived(
    address indexed payer,
    address collection,
    uint256 saleId,
    uint256 quantity,
    uint256 payment
  );

  event RequestForMint(
    address indexed payer,
    address indexed to,
    address collection,
    uint256 nonce,
    uint256 quantity
  );

  modifier validCollection(address _collection) {
    store.validateCollection(_collection);
    _;
  }

  modifier storeOrCollectionAuthorized(address _collection) {
    require(
      store.isAuthorized(msg.sender, _collection),
      "UNAUTHORIZED: Sender is not authorized"
    );
    _;
  }

  constructor(address _store) {
    store = Store(_store);
  }

  function buy(
    address _collection,
    uint256 _saleId,
    address _to,
    uint256 _qtyAllowed,
    uint256 _qtyToBuy,
    bytes32[] calldata _proof,
    bool _mintL1
  ) external payable nonStopped validCollection(_collection) {
    (bytes32 whitelistRoot, , , uint256 price) = store.sales(
      _collection,
      _saleId
    );
    if (whitelistRoot != bytes32(0)) {
      _verifyPresaleBuy(_collection, _saleId, _qtyToBuy, _qtyAllowed, _proof);
      presaleTokens[_collection][_saleId][msg.sender] += _qtyToBuy;
    }
    require(msg.value >= price * _qtyToBuy, "PAYMENT: Insufficient funds");
    balance[_collection] += msg.value;
    _mintRequest(_collection, _saleId, _to, _qtyToBuy, _mintL1);
    emit PaymentReceived(
      msg.sender,
      _collection,
      _saleId,
      _qtyToBuy,
      msg.value
    );
  }

  function reserve(
    address _collection,
    uint256 _saleId,
    address[] memory _to,
    uint256[] memory _qty,
    bool _mintL1
  )
    external
    nonStopped
    validCollection(_collection)
    storeOrCollectionAuthorized(_collection)
  {
    require(
      _to.length == _qty.length,
      "A quantity must be set for each benefited"
    );
    for (uint256 i = 0; i < _to.length; i++) {
      _mintRequest(_collection, _saleId, _to[i], _qty[i], _mintL1);
    }
  }

  function withdraw(address _collection, address receiver)
    external
    nonStopped
    validCollection(_collection)
  {
    require(
      Collection(_collection).owner() == msg.sender,
      "Sender is not the owner of the collection"
    );
    uint256 balanceToWithdraw = balance[_collection];
    balance[_collection] = 0;
    payable(receiver).transfer(balanceToWithdraw);
    emit Withdraw(_collection, msg.sender, balanceToWithdraw);
  }

  function verifyPresale(
    address _collection,
    uint256 _saleId,
    address account,
    uint256 qty,
    bytes32[] memory proof
  ) public view nonStopped validCollection(_collection) returns (bool) {
    return _verify(_collection, _saleId, _leaf(account, qty), proof);
  }

  function _mintRequest(
    address _collection,
    uint256 _saleId,
    address _to,
    uint256 _qty,
    bool _mintL1
  ) internal {
    _verifyMintRequest(_collection, _saleId, _qty, _mintL1);
    uint256 initialTokenId = lastTokenId[_collection] + 1;
    sold[_collection][_saleId] += _qty;
    lastTokenId[_collection] += _qty;

    if (_mintL1) {
      for (uint256 i = initialTokenId; i <= lastTokenId[_collection]; i++) {
        Collection(_collection).mint(_to, i);
      }
    } else {
      emit RequestForMint(msg.sender, _to, _collection, initialTokenId, _qty);
    }
  }

  function _verify(
    address _collection,
    uint256 _saleId,
    bytes32 leaf,
    bytes32[] memory proof
  ) internal view returns (bool) {
    (bytes32 whitelistRoot, , , ) = store.sales(_collection, _saleId);
    return MerkleProof.verify(proof, whitelistRoot, leaf);
  }

  function _verifyMintRequest(
    address _collection,
    uint256 _saleId,
    uint256 _qtyToBuy,
    bool _mintL1
  ) internal view {
    (, bool mintL1Authorized) = store.collection(_collection);
    (, bool active, uint256 supply, ) = store.sales(_collection, _saleId);
    require(!_mintL1 || mintL1Authorized, "Minting to L1 is not authorized");
    require(
      active || Collection(_collection).owner() == msg.sender,
      "TRANSACTION: Sale is not active"
    );

    require(
      _qtyToBuy + sold[_collection][_saleId] <= supply,
      "SUPPLY: Value exceeds supply"
    );
  }

  function _verifyPresaleBuy(
    address _collection,
    uint256 _saleId,
    uint256 _qtyToBuy,
    uint256 _qtyAllowed,
    bytes32[] calldata _proof
  ) internal view {
    require(
      verifyPresale(_collection, _saleId, msg.sender, _qtyAllowed, _proof),
      "TRANSACTION: Invalid proof"
    );
    require(
      presaleTokens[_collection][_saleId][msg.sender] + _qtyToBuy <=
        _qtyAllowed,
      "TRANSACTION: More than allowed"
    );
  }

  function _leaf(address account, uint256 qty) internal pure returns (bytes32) {
    return keccak256(abi.encodePacked(account, qty));
  }
}

// File: contracts/Collection.sol



// SPDX-License-Identifier: MIT
pragma solidity >=0.8.4;

import "@openzeppelin/contracts-upgradeable/token/ERC721/ERC721Upgradeable.sol";
import "@openzeppelin/contracts/utils/Strings.sol";
import "./utils/Parsing.sol";
import "./features/AuthorizableUpgradeable.sol";

contract Collection is ERC721Upgradeable, AuthorizableUpgradeable {
  using StringsUpgradeable for uint256;

  uint256 public supply;
  string public baseTokenURI;

  mapping(uint256 => string) private _tokenURIs;

  event AssetMinted(address to, uint256 id);

  function init(
    string memory _name,
    string memory _symbol,
    string memory _baseTokenURI,
    address _seller,
    uint256 _supply,
    address[] memory _authorized,
    address _owner
  ) public initializer {
    __ERC721_init(_name, _symbol);
    __Ownable_init();
    supply = _supply;
    for (uint256 i = 0; i < _authorized.length; i++) {
      authorize(_authorized[i], true);
    }
    authorize(_seller, true);
    authorize(_owner, true);
    baseTokenURI = _baseTokenURI;
    transferOwnership(_owner);
  }

  function tokenURI(uint256 _tokenId)
    public
    view
    virtual
    override
    returns (string memory)
  {
    require(
      _exists(_tokenId),
      "ERC721Metadata: URI query for nonexistent token"
    );
    return _calculateTokenURI(_tokenId);
  }

  function mintFor(
    address _user,
    uint256 _quantity,
    bytes calldata _mintingBlob
  ) external onlyAuthorized {
    require(_quantity == 1, "Mintable: invalid quantity");
    uint256 id = Parsing.getTokenId(_mintingBlob);
    mint(_user, id);
  }

  function mint(address _user, uint256 _id) public onlyAuthorized {
    _safeMint(_user, _id);
    emit AssetMinted(_user, _id);
  }

  function _calculateTokenURI(uint256 _tokenId)
    internal
    view
    returns (string memory)
  {
    return
      string(abi.encodePacked(baseTokenURI, "/", Strings.toString(_tokenId)));
  }
}

// File: contracts/Store.sol



// SPDX-License-Identifier: MIT
pragma solidity >=0.8.4;
import "@openzeppelin/contracts/utils/cryptography/MerkleProof.sol";
import "./Factory.sol";
import "./Collection.sol";
import "./features/Authorizable.sol";
import "./features/Stoppable.sol";
import "./utils/Parsing.sol";
import "./utils/Structs.sol";

struct CollectionStatus {
  bool isBlacklisted;
  bool mintL1Authorized;
}

contract Store is Stoppable, Authorizable {
  Factory public factory;
  mapping(address => CollectionStatus) public collection;
  mapping(address => Sale[]) public sales;

  event SalesAdded(address collection, Sale[] sales);
  event CollectionAdded(address collection);
  event PriceChanged(
    address collection,
    uint256 saleId,
    uint256 oldValue,
    uint256 newValue
  );
  event SupplyChanged(
    address collection,
    uint256 saleId,
    uint256 oldValue,
    uint256 newValue
  );
  event WhitelistChanged(
    address collection,
    uint256 saleId,
    bytes32 oldValue,
    bytes32 newValue
  );
  event CollectionBlacklisted(address collection, bool blacklisted);

  modifier storeOrCollectionAuthorized(address _collection) {
    require(
      isAuthorized(msg.sender, _collection),
      "UNAUTHORIZED: Sender is not authorized"
    );
    _;
  }

  modifier validCollection(address _collection) {
    validateCollection(_collection);
    _;
  }

  constructor(address _factory) {
    factory = Factory(_factory);
    authorize(_factory, true);
    authorize(msg.sender, true);
  }

  function addCollection(address _collection, bool _mintL1Authorized)
    external
    nonStopped
  {
    require(
      factory.isCollection(_collection),
      "TRANSACTION: Invalid collection"
    );
    collection[_collection].mintL1Authorized = _mintL1Authorized;

    emit CollectionAdded(_collection);
  }

  function addSales(address _collection, Sale[] memory _sales)
    external
    nonStopped
    validCollection(_collection)
    storeOrCollectionAuthorized(_collection)
  {
    for (uint256 i = 0; i < _sales.length; i++) {
      _addSale(_collection, _sales[i]);
    }

    emit SalesAdded(_collection, _sales);
  }

  function blacklistCollection(address _collection, bool _blacklist)
    external
    nonStopped
    onlyOwner
  {
    collection[_collection].isBlacklisted = _blacklist;
    emit CollectionBlacklisted(_collection, _blacklist);
  }

  function authorizeMintL1(address _collection, bool _authorize)
    external
    nonStopped
    validCollection(_collection)
    storeOrCollectionAuthorized(_collection)
  {
    collection[_collection].mintL1Authorized = _authorize;
  }

  function setSaleActive(
    address _collection,
    uint256 _saleId,
    bool _active
  )
    public
    nonStopped
    validCollection(_collection)
    storeOrCollectionAuthorized(_collection)
  {
    sales[_collection][_saleId].active = _active;
  }

  function setPrice(
    address _collection,
    uint256 _saleId,
    uint256 _newPrice
  )
    public
    nonStopped
    validCollection(_collection)
    storeOrCollectionAuthorized(_collection)
  {
    uint256 oldValue = sales[_collection][_saleId].price;
    sales[_collection][_saleId].price = _newPrice;
    emit PriceChanged(_collection, _saleId, oldValue, _newPrice);
  }

  function setSupply(
    address _collection,
    uint256 _saleId,
    uint256 _newSupply
  )
    public
    nonStopped
    validCollection(_collection)
    storeOrCollectionAuthorized(_collection)
  {
    uint256 currentSaleSupply = sales[_collection][_saleId].supply;
    uint256 currentTotalSupply = 0;
    for (uint256 i = 0; i < sales[_collection].length; i++) {
      currentTotalSupply += sales[_collection][i].supply;
    }
    require(
      currentTotalSupply - currentSaleSupply + _newSupply <=
        Collection(_collection).supply(),
      "SUPPLY: value exeeds collection max supply"
    );

    uint256 oldValue = sales[_collection][_saleId].supply;
    sales[_collection][_saleId].supply = uint216(_newSupply);
    emit SupplyChanged(_collection, _saleId, oldValue, _newSupply);
  }

  function setRoot(
    address _collection,
    uint256 _saleId,
    bytes32 _newRoot
  )
    public
    nonStopped
    validCollection(_collection)
    storeOrCollectionAuthorized(_collection)
  {
    bytes32 oldValue = sales[_collection][_saleId].whitelistRoot;
    sales[_collection][_saleId].whitelistRoot = _newRoot;
    emit WhitelistChanged(_collection, _saleId, oldValue, _newRoot);
  }

  function getState(address _collection, uint256 _saleId)
    external
    view
    validCollection(_collection)
    returns (Sale memory)
  {
    return sales[_collection][_saleId];
  }

  function getSalesCount(address _collection) external view returns (uint256) {
    return sales[_collection].length;
  }

  function validateCollection(address _collection) public view {
    require(
      factory.isCollection(_collection),
      "Collection is not part of the store"
    );
    require(
      !collection[_collection].isBlacklisted,
      "Collection has been blacklisted"
    );
  }

  function isAuthorized(address _user, address _collection)
    public
    view
    returns (bool)
  {
    return authorized[_user] || Collection(_collection).authorized(_user);
  }

  function transferOwnership(address newOwner)
    public
    virtual
    override(Authorizable, Ownable)
    onlyOwner
  {
    super.transferOwnership(newOwner);
  }

  function _addSale(address _collection, Sale memory _sale) internal {
    uint256 currentSupply = 0;
    for (uint256 i = 0; i < sales[_collection].length; i++) {
      currentSupply += sales[_collection][i].supply;
    }
    require(
      currentSupply + _sale.supply <= Collection(_collection).supply(),
      "SUPPLY: value exeeds collection max supply"
    );
    sales[_collection].push(_sale);
  }
}

// File: contracts/utils/Structs.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

struct Sale {
  bytes32 whitelistRoot;
  bool active;
  uint216 supply;
  uint256 price;
}

// File: @openzeppelin/contracts-upgradeable/token/ERC721/ERC721Upgradeable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (token/ERC721/ERC721.sol)

pragma solidity ^0.8.0;

import "./IERC721Upgradeable.sol";
import "./IERC721ReceiverUpgradeable.sol";
import "./extensions/IERC721MetadataUpgradeable.sol";
import "../../utils/AddressUpgradeable.sol";
import "../../utils/ContextUpgradeable.sol";
import "../../utils/StringsUpgradeable.sol";
import "../../utils/introspection/ERC165Upgradeable.sol";
import "../../proxy/utils/Initializable.sol";

/**
 * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
 * the Metadata extension, but not including the Enumerable extension, which is available separately as
 * {ERC721Enumerable}.
 */
contract ERC721Upgradeable is Initializable, ContextUpgradeable, ERC165Upgradeable, IERC721Upgradeable, IERC721MetadataUpgradeable {
    using AddressUpgradeable for address;
    using StringsUpgradeable for uint256;

    // Token name
    string private _name;

    // Token symbol
    string private _symbol;

    // Mapping from token ID to owner address
    mapping(uint256 => address) private _owners;

    // Mapping owner address to token count
    mapping(address => uint256) private _balances;

    // Mapping from token ID to approved address
    mapping(uint256 => address) private _tokenApprovals;

    // Mapping from owner to operator approvals
    mapping(address => mapping(address => bool)) private _operatorApprovals;

    /**
     * @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
     */
    function __ERC721_init(string memory name_, string memory symbol_) internal initializer {
        __Context_init_unchained();
        __ERC165_init_unchained();
        __ERC721_init_unchained(name_, symbol_);
    }

    function __ERC721_init_unchained(string memory name_, string memory symbol_) internal initializer {
        _name = name_;
        _symbol = symbol_;
    }

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165Upgradeable, IERC165Upgradeable) returns (bool) {
        return
            interfaceId == type(IERC721Upgradeable).interfaceId ||
            interfaceId == type(IERC721MetadataUpgradeable).interfaceId ||
            super.supportsInterface(interfaceId);
    }

    /**
     * @dev See {IERC721-balanceOf}.
     */
    function balanceOf(address owner) public view virtual override returns (uint256) {
        require(owner != address(0), "ERC721: balance query for the zero address");
        return _balances[owner];
    }

    /**
     * @dev See {IERC721-ownerOf}.
     */
    function ownerOf(uint256 tokenId) public view virtual override returns (address) {
        address owner = _owners[tokenId];
        require(owner != address(0), "ERC721: owner query for nonexistent token");
        return owner;
    }

    /**
     * @dev See {IERC721Metadata-name}.
     */
    function name() public view virtual override returns (string memory) {
        return _name;
    }

    /**
     * @dev See {IERC721Metadata-symbol}.
     */
    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    /**
     * @dev See {IERC721Metadata-tokenURI}.
     */
    function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
        require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");

        string memory baseURI = _baseURI();
        return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
    }

    /**
     * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
     * token will be the concatenation of the `baseURI` and the `tokenId`. Empty
     * by default, can be overriden in child contracts.
     */
    function _baseURI() internal view virtual returns (string memory) {
        return "";
    }

    /**
     * @dev See {IERC721-approve}.
     */
    function approve(address to, uint256 tokenId) public virtual override {
        address owner = ERC721Upgradeable.ownerOf(tokenId);
        require(to != owner, "ERC721: approval to current owner");

        require(
            _msgSender() == owner || isApprovedForAll(owner, _msgSender()),
            "ERC721: approve caller is not owner nor approved for all"
        );

        _approve(to, tokenId);
    }

    /**
     * @dev See {IERC721-getApproved}.
     */
    function getApproved(uint256 tokenId) public view virtual override returns (address) {
        require(_exists(tokenId), "ERC721: approved query for nonexistent token");

        return _tokenApprovals[tokenId];
    }

    /**
     * @dev See {IERC721-setApprovalForAll}.
     */
    function setApprovalForAll(address operator, bool approved) public virtual override {
        _setApprovalForAll(_msgSender(), operator, approved);
    }

    /**
     * @dev See {IERC721-isApprovedForAll}.
     */
    function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
        return _operatorApprovals[owner][operator];
    }

    /**
     * @dev See {IERC721-transferFrom}.
     */
    function transferFrom(
        address from,
        address to,
        uint256 tokenId
    ) public virtual override {
        //solhint-disable-next-line max-line-length
        require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");

        _transfer(from, to, tokenId);
    }

    /**
     * @dev See {IERC721-safeTransferFrom}.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId
    ) public virtual override {
        safeTransferFrom(from, to, tokenId, "");
    }

    /**
     * @dev See {IERC721-safeTransferFrom}.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId,
        bytes memory _data
    ) public virtual override {
        require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
        _safeTransfer(from, to, tokenId, _data);
    }

    /**
     * @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.
     *
     * `_data` is additional data, it has no specified format and it is sent in call to `to`.
     *
     * This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
     * implement alternative mechanisms to perform token transfer, such as signature-based.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function _safeTransfer(
        address from,
        address to,
        uint256 tokenId,
        bytes memory _data
    ) internal virtual {
        _transfer(from, to, tokenId);
        require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
    }

    /**
     * @dev Returns whether `tokenId` exists.
     *
     * Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
     *
     * Tokens start existing when they are minted (`_mint`),
     * and stop existing when they are burned (`_burn`).
     */
    function _exists(uint256 tokenId) internal view virtual returns (bool) {
        return _owners[tokenId] != address(0);
    }

    /**
     * @dev Returns whether `spender` is allowed to manage `tokenId`.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
        require(_exists(tokenId), "ERC721: operator query for nonexistent token");
        address owner = ERC721Upgradeable.ownerOf(tokenId);
        return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
    }

    /**
     * @dev Safely mints `tokenId` and transfers it to `to`.
     *
     * Requirements:
     *
     * - `tokenId` must not exist.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function _safeMint(address to, uint256 tokenId) internal virtual {
        _safeMint(to, tokenId, "");
    }

    /**
     * @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
     * forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
     */
    function _safeMint(
        address to,
        uint256 tokenId,
        bytes memory _data
    ) internal virtual {
        _mint(to, tokenId);
        require(
            _checkOnERC721Received(address(0), to, tokenId, _data),
            "ERC721: transfer to non ERC721Receiver implementer"
        );
    }

    /**
     * @dev Mints `tokenId` and transfers it to `to`.
     *
     * WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
     *
     * Requirements:
     *
     * - `tokenId` must not exist.
     * - `to` cannot be the zero address.
     *
     * Emits a {Transfer} event.
     */
    function _mint(address to, uint256 tokenId) internal virtual {
        require(to != address(0), "ERC721: mint to the zero address");
        require(!_exists(tokenId), "ERC721: token already minted");

        _beforeTokenTransfer(address(0), to, tokenId);

        _balances[to] += 1;
        _owners[tokenId] = to;

        emit Transfer(address(0), to, tokenId);
    }

    /**
     * @dev Destroys `tokenId`.
     * The approval is cleared when the token is burned.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     *
     * Emits a {Transfer} event.
     */
    function _burn(uint256 tokenId) internal virtual {
        address owner = ERC721Upgradeable.ownerOf(tokenId);

        _beforeTokenTransfer(owner, address(0), tokenId);

        // Clear approvals
        _approve(address(0), tokenId);

        _balances[owner] -= 1;
        delete _owners[tokenId];

        emit Transfer(owner, address(0), tokenId);
    }

    /**
     * @dev Transfers `tokenId` from `from` to `to`.
     *  As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     *
     * Emits a {Transfer} event.
     */
    function _transfer(
        address from,
        address to,
        uint256 tokenId
    ) internal virtual {
        require(ERC721Upgradeable.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
        require(to != address(0), "ERC721: transfer to the zero address");

        _beforeTokenTransfer(from, to, tokenId);

        // Clear approvals from the previous owner
        _approve(address(0), tokenId);

        _balances[from] -= 1;
        _balances[to] += 1;
        _owners[tokenId] = to;

        emit Transfer(from, to, tokenId);
    }

    /**
     * @dev Approve `to` to operate on `tokenId`
     *
     * Emits a {Approval} event.
     */
    function _approve(address to, uint256 tokenId) internal virtual {
        _tokenApprovals[tokenId] = to;
        emit Approval(ERC721Upgradeable.ownerOf(tokenId), to, tokenId);
    }

    /**
     * @dev Approve `operator` to operate on all of `owner` tokens
     *
     * Emits a {ApprovalForAll} event.
     */
    function _setApprovalForAll(
        address owner,
        address operator,
        bool approved
    ) internal virtual {
        require(owner != operator, "ERC721: approve to caller");
        _operatorApprovals[owner][operator] = approved;
        emit ApprovalForAll(owner, operator, approved);
    }

    /**
     * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
     * The call is not executed if the target address is not a contract.
     *
     * @param from address representing the previous owner of the given token ID
     * @param to target address that will receive the tokens
     * @param tokenId uint256 ID of the token to be transferred
     * @param _data bytes optional data to send along with the call
     * @return bool whether the call correctly returned the expected magic value
     */
    function _checkOnERC721Received(
        address from,
        address to,
        uint256 tokenId,
        bytes memory _data
    ) private returns (bool) {
        if (to.isContract()) {
            try IERC721ReceiverUpgradeable(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
                return retval == IERC721ReceiverUpgradeable.onERC721Received.selector;
            } catch (bytes memory reason) {
                if (reason.length == 0) {
                    revert("ERC721: transfer to non ERC721Receiver implementer");
                } else {
                    assembly {
                        revert(add(32, reason), mload(reason))
                    }
                }
            }
        } else {
            return true;
        }
    }

    /**
     * @dev Hook that is called before any token transfer. This includes minting
     * and burning.
     *
     * Calling conditions:
     *
     * - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
     * transferred to `to`.
     * - When `from` is zero, `tokenId` will be minted for `to`.
     * - When `to` is zero, ``from``'s `tokenId` will be burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 tokenId
    ) internal virtual {}
    uint256[44] private __gap;
}

// File: @openzeppelin/contracts/utils/Strings.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (utils/Strings.sol)

pragma solidity ^0.8.0;

/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        // Inspired by OraclizeAPI's implementation - MIT licence
        // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol

        if (value == 0) {
            return "0";
        }
        uint256 temp = value;
        uint256 digits;
        while (temp != 0) {
            digits++;
            temp /= 10;
        }
        bytes memory buffer = new bytes(digits);
        while (value != 0) {
            digits -= 1;
            buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
            value /= 10;
        }
        return string(buffer);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        if (value == 0) {
            return "0x00";
        }
        uint256 temp = value;
        uint256 length = 0;
        while (temp != 0) {
            length++;
            temp >>= 8;
        }
        return toHexString(value, length);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
     */
    function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
        bytes memory buffer = new bytes(2 * length + 2);
        buffer[0] = "0";
        buffer[1] = "x";
        for (uint256 i = 2 * length + 1; i > 1; --i) {
            buffer[i] = _HEX_SYMBOLS[value & 0xf];
            value >>= 4;
        }
        require(value == 0, "Strings: hex length insufficient");
        return string(buffer);
    }
}

// File: contracts/utils/Parsing.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

// Helper library for handling and manipulating bytes
import "./Bytes.sol";

library Parsing {
  // Split the minting blob into token_id and blueprint portions
  // {token_id}:{blueprint}

  function split(bytes calldata blob)
    internal
    pure
    returns (uint256, bytes memory)
  {
    int256 index = Bytes.indexOf(blob, ":", 0);
    require(index >= 0, "Separator must exist");
    // Trim the { and } from the parameters
    uint256 tokenID = Bytes.toUint(blob[1:uint256(index) - 1]);
    uint256 blueprintLength = blob.length - uint256(index) - 3;
    if (blueprintLength == 0) {
      return (tokenID, bytes(""));
    }
    bytes calldata blueprint = blob[uint256(index) + 2:blob.length - 1];
    return (tokenID, blueprint);
  }

  function getTokenId(bytes calldata blob) internal pure returns (uint256) {
    int256 index = Bytes.indexOf(blob, ":", 0);
    require(index >= 0, "Separator must exist");
    // Trim the { and } from the parameters
    return Bytes.toUint(blob[1:uint256(index) - 1]);
  }
}

// File: contracts/features/AuthorizableUpgradeable.sol



// SPDX-License-Identifier: MIT
pragma solidity >=0.8.4;

import "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol";

contract AuthorizableUpgradeable is OwnableUpgradeable {
  mapping(address => bool) public authorized;

  modifier onlyAuthorized() {
    require(authorized[msg.sender], "UNAUTHORIZED: Sender is not authorized");
    _;
  }

  function transferOwnership(address newOwner)
    public
    virtual
    override
    onlyOwner
  {
    authorized[owner()] = false;
    super.transferOwnership(newOwner);
    authorized[newOwner] = true;
  }

  function authorize(address _user, bool _authorize) public onlyOwner {
    authorized[_user] = _authorize;
  }
}

// File: @openzeppelin/contracts-upgradeable/token/ERC721/IERC721Upgradeable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (token/ERC721/IERC721.sol)

pragma solidity ^0.8.0;

import "../../utils/introspection/IERC165Upgradeable.sol";

/**
 * @dev Required interface of an ERC721 compliant contract.
 */
interface IERC721Upgradeable is IERC165Upgradeable {
    /**
     * @dev Emitted when `tokenId` token is transferred from `from` to `to`.
     */
    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);

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

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

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

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

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

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

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

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

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

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

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

// File: @openzeppelin/contracts-upgradeable/token/ERC721/IERC721ReceiverUpgradeable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (token/ERC721/IERC721Receiver.sol)

pragma solidity ^0.8.0;

/**
 * @title ERC721 token receiver interface
 * @dev Interface for any contract that wants to support safeTransfers
 * from ERC721 asset contracts.
 */
interface IERC721ReceiverUpgradeable {
    /**
     * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
     * by `operator` from `from`, this function is called.
     *
     * It must return its Solidity selector to confirm the token transfer.
     * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
     *
     * The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
     */
    function onERC721Received(
        address operator,
        address from,
        uint256 tokenId,
        bytes calldata data
    ) external returns (bytes4);
}

// File: @openzeppelin/contracts-upgradeable/token/ERC721/extensions/IERC721MetadataUpgradeable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (token/ERC721/extensions/IERC721Metadata.sol)

pragma solidity ^0.8.0;

import "../IERC721Upgradeable.sol";

/**
 * @title ERC-721 Non-Fungible Token Standard, optional metadata extension
 * @dev See https://eips.ethereum.org/EIPS/eip-721
 */
interface IERC721MetadataUpgradeable is IERC721Upgradeable {
    /**
     * @dev Returns the token collection name.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the token collection symbol.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
     */
    function tokenURI(uint256 tokenId) external view returns (string memory);
}

// File: @openzeppelin/contracts-upgradeable/utils/AddressUpgradeable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (utils/Address.sol)

pragma solidity ^0.8.0;

/**
 * @dev Collection of functions related to the address type
 */
library AddressUpgradeable {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

        uint256 size;
        assembly {
            size := extcodesize(account)
        }
        return size > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCall(target, data, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        require(isContract(target), "Address: call to non-contract");

        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");

        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly

                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

// File: @openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (utils/Context.sol)

pragma solidity ^0.8.0;
import "../proxy/utils/Initializable.sol";

/**
 * @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 ContextUpgradeable is Initializable {
    function __Context_init() internal initializer {
        __Context_init_unchained();
    }

    function __Context_init_unchained() internal initializer {
    }
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
    uint256[50] private __gap;
}

// File: @openzeppelin/contracts-upgradeable/utils/StringsUpgradeable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (utils/Strings.sol)

pragma solidity ^0.8.0;

/**
 * @dev String operations.
 */
library StringsUpgradeable {
    bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        // Inspired by OraclizeAPI's implementation - MIT licence
        // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol

        if (value == 0) {
            return "0";
        }
        uint256 temp = value;
        uint256 digits;
        while (temp != 0) {
            digits++;
            temp /= 10;
        }
        bytes memory buffer = new bytes(digits);
        while (value != 0) {
            digits -= 1;
            buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
            value /= 10;
        }
        return string(buffer);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        if (value == 0) {
            return "0x00";
        }
        uint256 temp = value;
        uint256 length = 0;
        while (temp != 0) {
            length++;
            temp >>= 8;
        }
        return toHexString(value, length);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
     */
    function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
        bytes memory buffer = new bytes(2 * length + 2);
        buffer[0] = "0";
        buffer[1] = "x";
        for (uint256 i = 2 * length + 1; i > 1; --i) {
            buffer[i] = _HEX_SYMBOLS[value & 0xf];
            value >>= 4;
        }
        require(value == 0, "Strings: hex length insufficient");
        return string(buffer);
    }
}

// File: @openzeppelin/contracts-upgradeable/utils/introspection/ERC165Upgradeable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (utils/introspection/ERC165.sol)

pragma solidity ^0.8.0;

import "./IERC165Upgradeable.sol";
import "../../proxy/utils/Initializable.sol";

/**
 * @dev Implementation of the {IERC165} interface.
 *
 * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
 * for the additional interface id that will be supported. For example:
 *
 * ```solidity
 * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
 *     return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
 * }
 * ```
 *
 * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
 */
abstract contract ERC165Upgradeable is Initializable, IERC165Upgradeable {
    function __ERC165_init() internal initializer {
        __ERC165_init_unchained();
    }

    function __ERC165_init_unchained() internal initializer {
    }
    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IERC165Upgradeable).interfaceId;
    }
    uint256[50] private __gap;
}

// File: @openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (proxy/utils/Initializable.sol)

pragma solidity ^0.8.0;

/**
 * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
 * behind a proxy. Since a proxied contract can't have a constructor, it's common to move constructor logic to an
 * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
 * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
 *
 * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
 * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
 *
 * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
 * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
 *
 * [CAUTION]
 * ====
 * Avoid leaving a contract uninitialized.
 *
 * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
 * contract, which may impact the proxy. To initialize the implementation contract, you can either invoke the
 * initializer manually, or you can include a constructor to automatically mark it as initialized when it is deployed:
 *
 * [.hljs-theme-light.nopadding]
 * ```
 * /// @custom:oz-upgrades-unsafe-allow constructor
 * constructor() initializer {}
 * ```
 * ====
 */
abstract contract Initializable {
    /**
     * @dev Indicates that the contract has been initialized.
     */
    bool private _initialized;

    /**
     * @dev Indicates that the contract is in the process of being initialized.
     */
    bool private _initializing;

    /**
     * @dev Modifier to protect an initializer function from being invoked twice.
     */
    modifier initializer() {
        require(_initializing || !_initialized, "Initializable: contract is already initialized");

        bool isTopLevelCall = !_initializing;
        if (isTopLevelCall) {
            _initializing = true;
            _initialized = true;
        }

        _;

        if (isTopLevelCall) {
            _initializing = false;
        }
    }
}

// File: @openzeppelin/contracts-upgradeable/utils/introspection/IERC165Upgradeable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (utils/introspection/IERC165.sol)

pragma solidity ^0.8.0;

/**
 * @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 IERC165Upgradeable {
    /**
     * @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: contracts/utils/Bytes.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

library Bytes {
  bytes constant alphabet = "0123456789abcdef";

  /**
   * @dev Converts a `uint256` to a `string`.
   * via OraclizeAPI - MIT licence
   * https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
   */
  function fromUint(uint256 value) internal pure returns (string memory) {
    if (value == 0) {
      return "0";
    }
    uint256 temp = value;
    uint256 digits;
    while (temp != 0) {
      digits++;
      temp /= 10;
    }
    bytes memory buffer = new bytes(digits);
    uint256 index = digits - 1;
    temp = value;
    while (temp != 0) {
      buffer[index--] = bytes1(uint8(48 + (temp % 10)));
      temp /= 10;
    }
    return string(buffer);
  }

  /**
   * Index Of
   *
   * Locates and returns the position of a character within a string starting
   * from a defined offset
   *
   * @param _base When being used for a data type this is the extended object
   *              otherwise this is the string acting as the haystack to be
   *              searched
   * @param _value The needle to search for, at present this is currently
   *               limited to one character
   * @param _offset The starting point to start searching from which can start
   *                from 0, but must not exceed the length of the string
   * @return int The position of the needle starting from 0 and returning -1
   *             in the case of no matches found
   */
  function indexOf(
    bytes memory _base,
    string memory _value,
    uint256 _offset
  ) internal pure returns (int256) {
    bytes memory _valueBytes = bytes(_value);

    assert(_valueBytes.length == 1);

    for (uint256 i = _offset; i < _base.length; i++) {
      if (_base[i] == _valueBytes[0]) {
        return int256(i);
      }
    }

    return -1;
  }

  function substring(
    bytes memory strBytes,
    uint256 startIndex,
    uint256 endIndex
  ) internal pure returns (string memory) {
    bytes memory result = new bytes(endIndex - startIndex);
    for (uint256 i = startIndex; i < endIndex; i++) {
      result[i - startIndex] = strBytes[i];
    }
    return string(result);
  }

  function toUint(bytes memory b) internal pure returns (uint256) {
    uint256 result = 0;
    for (uint256 i = 0; i < b.length; i++) {
      uint256 val = uint256(uint8(b[i]));
      if (val >= 48 && val <= 57) {
        result = result * 10 + (val - 48);
      }
    }
    return result;
  }
}

// File: @openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (access/Ownable.sol)

pragma solidity ^0.8.0;

import "../utils/ContextUpgradeable.sol";
import "../proxy/utils/Initializable.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 OwnableUpgradeable is Initializable, ContextUpgradeable {
    address private _owner;

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

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    function __Ownable_init() internal initializer {
        __Context_init_unchained();
        __Ownable_init_unchained();
    }

    function __Ownable_init_unchained() internal initializer {
        _transferOwnership(_msgSender());
    }

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

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

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _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);
    }
    uint256[49] private __gap;
}

// File: @openzeppelin/contracts/utils/cryptography/MerkleProof.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (utils/cryptography/MerkleProof.sol)

pragma solidity ^0.8.0;

/**
 * @dev These functions deal with verification of Merkle Trees proofs.
 *
 * The proofs can be generated using the JavaScript library
 * https://github.com/miguelmota/merkletreejs[merkletreejs].
 * Note: the hashing algorithm should be keccak256 and pair sorting should be enabled.
 *
 * See `test/utils/cryptography/MerkleProof.test.js` for some examples.
 */
library MerkleProof {
    /**
     * @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree
     * defined by `root`. For this, a `proof` must be provided, containing
     * sibling hashes on the branch from the leaf to the root of the tree. Each
     * pair of leaves and each pair of pre-images are assumed to be sorted.
     */
    function verify(
        bytes32[] memory proof,
        bytes32 root,
        bytes32 leaf
    ) internal pure returns (bool) {
        return processProof(proof, leaf) == root;
    }

    /**
     * @dev Returns the rebuilt hash obtained by traversing a Merklee tree up
     * from `leaf` using `proof`. A `proof` is valid if and only if the rebuilt
     * hash matches the root of the tree. When processing the proof, the pairs
     * of leafs & pre-images are assumed to be sorted.
     *
     * _Available since v4.4._
     */
    function processProof(bytes32[] memory proof, bytes32 leaf) internal pure returns (bytes32) {
        bytes32 computedHash = leaf;
        for (uint256 i = 0; i < proof.length; i++) {
            bytes32 proofElement = proof[i];
            if (computedHash <= proofElement) {
                // Hash(current computed hash + current element of the proof)
                computedHash = keccak256(abi.encodePacked(computedHash, proofElement));
            } else {
                // Hash(current element of the proof + current computed hash)
                computedHash = keccak256(abi.encodePacked(proofElement, computedHash));
            }
        }
        return computedHash;
    }
}

// File: contracts/Factory.sol



// SPDX-License-Identifier: MIT
pragma solidity >=0.8.4;

import "@openzeppelin/contracts/proxy/Clones.sol";
import "./utils/Address.sol";
import "./utils/Structs.sol";
import "./Collection.sol";
import "./Store.sol";

struct CollectionData {
  string name;
  string symbol;
  string baseTokenURI;
  uint256 supply;
  address[] authorizedAddresses;
  bool mintL1Authorized;
}

contract Factory is Ownable {
  address public collectionTemplate;
  address public store;
  address public seller;
  mapping(address => bool) public isCollection;

  event CollectionCreated(
    string name,
    string symbol,
    address store,
    address seller,
    address collectionAddress
  );

  constructor(address _collectionTemplate) {
    collectionTemplate = _collectionTemplate;
  }

  function setStore(address _store, address _seller) external onlyOwner {
    store = _store;
    seller = _seller;
  }

  function setCollectionTemplate(address _collectionTemplate)
    external
    onlyOwner
  {
    collectionTemplate = _collectionTemplate;
  }

  function createCollection(
    CollectionData memory _collection,
    Sale[] memory _sales,
    address _owner
  ) external {
    require(store != address(0), "No store was set");
    require(seller != address(0), "No seller was set");
    address collectionAddress = Clones.clone(collectionTemplate);
    string memory strAddress = Address.toAsciiString(collectionAddress);
    string memory baseTokenURI = string(
      abi.encodePacked(_collection.baseTokenURI, "/0x", strAddress)
    );

    isCollection[collectionAddress] = true;
    Collection(collectionAddress).init(
      _collection.name,
      _collection.symbol,
      baseTokenURI,
      seller,
      _collection.supply,
      _collection.authorizedAddresses,
      _owner
    );
    Store(store).addCollection(collectionAddress, _collection.mintL1Authorized);
    if (_sales.length > 0) {
      Store(store).addSales(collectionAddress, _sales);
    }
    emit CollectionCreated(
      _collection.name,
      _collection.symbol,
      store,
      seller,
      collectionAddress
    );
  }
}

// File: contracts/features/Authorizable.sol



// SPDX-License-Identifier: MIT
pragma solidity >=0.8.4;

import "@openzeppelin/contracts/access/Ownable.sol";

contract Authorizable is Ownable {
  mapping(address => bool) public authorized;

  modifier onlyAuthorized() {
    require(authorized[msg.sender], "UNAUTHORIZED: Sender is not authorized");
    _;
  }

  function transferOwnership(address newOwner)
    public
    virtual
    override
    onlyOwner
  {
    authorized[owner()] = false;
    super.transferOwnership(newOwner);
    authorized[newOwner] = true;
  }

  function authorize(address _user, bool _authorize) public onlyOwner {
    authorized[_user] = _authorize;
  }
}

// File: contracts/features/Stoppable.sol



// SPDX-License-Identifier: MIT
pragma solidity >=0.8.4;

import "@openzeppelin/contracts/access/Ownable.sol";

contract Stoppable is Ownable {
  bool stopped;

  modifier nonStopped() {
    require(!stopped, "STOPPED: Contract is stopped");
    _;
  }

  function stop(bool _stop) public onlyOwner {
    stopped = _stop;
  }
}

// File: @openzeppelin/contracts/proxy/Clones.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (proxy/Clones.sol)

pragma solidity ^0.8.0;

/**
 * @dev https://eips.ethereum.org/EIPS/eip-1167[EIP 1167] is a standard for
 * deploying minimal proxy contracts, also known as "clones".
 *
 * > To simply and cheaply clone contract functionality in an immutable way, this standard specifies
 * > a minimal bytecode implementation that delegates all calls to a known, fixed address.
 *
 * The library includes functions to deploy a proxy using either `create` (traditional deployment) or `create2`
 * (salted deterministic deployment). It also includes functions to predict the addresses of clones deployed using the
 * deterministic method.
 *
 * _Available since v3.4._
 */
library Clones {
    /**
     * @dev Deploys and returns the address of a clone that mimics the behaviour of `implementation`.
     *
     * This function uses the create opcode, which should never revert.
     */
    function clone(address implementation) internal returns (address instance) {
        assembly {
            let ptr := mload(0x40)
            mstore(ptr, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000)
            mstore(add(ptr, 0x14), shl(0x60, implementation))
            mstore(add(ptr, 0x28), 0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000)
            instance := create(0, ptr, 0x37)
        }
        require(instance != address(0), "ERC1167: create failed");
    }

    /**
     * @dev Deploys and returns the address of a clone that mimics the behaviour of `implementation`.
     *
     * This function uses the create2 opcode and a `salt` to deterministically deploy
     * the clone. Using the same `implementation` and `salt` multiple time will revert, since
     * the clones cannot be deployed twice at the same address.
     */
    function cloneDeterministic(address implementation, bytes32 salt) internal returns (address instance) {
        assembly {
            let ptr := mload(0x40)
            mstore(ptr, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000)
            mstore(add(ptr, 0x14), shl(0x60, implementation))
            mstore(add(ptr, 0x28), 0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000)
            instance := create2(0, ptr, 0x37, salt)
        }
        require(instance != address(0), "ERC1167: create2 failed");
    }

    /**
     * @dev Computes the address of a clone deployed using {Clones-cloneDeterministic}.
     */
    function predictDeterministicAddress(
        address implementation,
        bytes32 salt,
        address deployer
    ) internal pure returns (address predicted) {
        assembly {
            let ptr := mload(0x40)
            mstore(ptr, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000)
            mstore(add(ptr, 0x14), shl(0x60, implementation))
            mstore(add(ptr, 0x28), 0x5af43d82803e903d91602b57fd5bf3ff00000000000000000000000000000000)
            mstore(add(ptr, 0x38), shl(0x60, deployer))
            mstore(add(ptr, 0x4c), salt)
            mstore(add(ptr, 0x6c), keccak256(ptr, 0x37))
            predicted := keccak256(add(ptr, 0x37), 0x55)
        }
    }

    /**
     * @dev Computes the address of a clone deployed using {Clones-cloneDeterministic}.
     */
    function predictDeterministicAddress(address implementation, bytes32 salt)
        internal
        view
        returns (address predicted)
    {
        return predictDeterministicAddress(implementation, salt, address(this));
    }
}

// File: contracts/utils/Address.sol



// SPDX-License-Identifier: MIT
pragma solidity >=0.8.4;

library Address {
  function toAsciiString(address x) internal pure returns (string memory) {
    bytes memory s = new bytes(40);
    for (uint256 i = 0; i < 20; i++) {
      bytes1 b = bytes1(uint8(uint256(uint160(x)) / (2**(8 * (19 - i)))));
      bytes1 hi = bytes1(uint8(b) / 16);
      bytes1 lo = bytes1(uint8(b) - 16 * uint8(hi));
      s[2 * i] = char(hi);
      s[2 * i + 1] = char(lo);
    }
    return string(s);
  }

  function char(bytes1 b) internal pure returns (bytes1 c) {
    if (uint8(b) < 10) return bytes1(uint8(b) + 0x30);
    else return bytes1(uint8(b) + 0x57);
  }
}

// File: @openzeppelin/contracts/access/Ownable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (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 Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

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

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _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: @openzeppelin/contracts/utils/Context.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (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;
    }
}