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//SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import './MintingStation.sol';

/// @title VerticalCrypto
/// @author Simon Fremaux (@dievardump)
contract VerticalCrypto is MintingStation {
    /// @notice constructor
    /// @param name_ name of the contract (see ERC721)
    /// @param symbol_ symbol of the contract (see ERC721)
    /// @param contractURI_ The contract URI (containing its metadata) - can be empty ""
    /// @param openseaProxyRegistry_ OpenSea's proxy registry to allow gas-less listings - can be address(0)
    /// @param owner_ Address to whom transfer ownership (can be address(0), then owner is deployer)
    constructor(
        string memory name_,
        string memory symbol_,
        string memory contractURI_,
        address openseaProxyRegistry_,
        address owner_,
        address[] memory minters
    )
        ERC721Ownable(
            name_,
            symbol_,
            contractURI_,
            openseaProxyRegistry_,
            owner_
        )
    {
        if (minters.length > 0) {
            _addMinters(minters);
        }
    }
}

// SPDX-License-Identifier: MIT

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() {
        _setOwner(_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 {
        _setOwner(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");
        _setOwner(newOwner);
    }

    function _setOwner(address newOwner) private {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "./IERC721.sol";
import "./IERC721Receiver.sol";
import "./extensions/IERC721Metadata.sol";
import "../../utils/Address.sol";
import "../../utils/Context.sol";
import "../../utils/Strings.sol";
import "../../utils/introspection/ERC165.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 ERC721 is Context, ERC165, IERC721, IERC721Metadata {
    using Address for address;
    using Strings 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.
     */
    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
        return
            interfaceId == type(IERC721).interfaceId ||
            interfaceId == type(IERC721Metadata).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 = ERC721.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 {
        require(operator != _msgSender(), "ERC721: approve to caller");

        _operatorApprovals[_msgSender()][operator] = approved;
        emit ApprovalForAll(_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 = ERC721.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 = ERC721.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(ERC721.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(ERC721.ownerOf(tokenId), to, tokenId);
    }

    /**
     * @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 IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
                return retval == IERC721Receiver.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 {}
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

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

/**
 * @dev Required interface of an ERC721 compliant contract.
 */
interface IERC721 is IERC165 {
    /**
     * @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;
}

// SPDX-License-Identifier: MIT

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

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "../ERC721.sol";
import "../../../utils/Context.sol";

/**
 * @title ERC721 Burnable Token
 * @dev ERC721 Token that can be irreversibly burned (destroyed).
 */
abstract contract ERC721Burnable is Context, ERC721 {
    /**
     * @dev Burns `tokenId`. See {ERC721-_burn}.
     *
     * Requirements:
     *
     * - The caller must own `tokenId` or be an approved operator.
     */
    function burn(uint256 tokenId) public virtual {
        //solhint-disable-next-line max-line-length
        require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721Burnable: caller is not owner nor approved");
        _burn(tokenId);
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "../ERC721.sol";
import "./IERC721Enumerable.sol";

/**
 * @dev This implements an optional extension of {ERC721} defined in the EIP that adds
 * enumerability of all the token ids in the contract as well as all token ids owned by each
 * account.
 */
abstract contract ERC721Enumerable is ERC721, IERC721Enumerable {
    // Mapping from owner to list of owned token IDs
    mapping(address => mapping(uint256 => uint256)) private _ownedTokens;

    // Mapping from token ID to index of the owner tokens list
    mapping(uint256 => uint256) private _ownedTokensIndex;

    // Array with all token ids, used for enumeration
    uint256[] private _allTokens;

    // Mapping from token id to position in the allTokens array
    mapping(uint256 => uint256) private _allTokensIndex;

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, ERC721) returns (bool) {
        return interfaceId == type(IERC721Enumerable).interfaceId || super.supportsInterface(interfaceId);
    }

    /**
     * @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
     */
    function tokenOfOwnerByIndex(address owner, uint256 index) public view virtual override returns (uint256) {
        require(index < ERC721.balanceOf(owner), "ERC721Enumerable: owner index out of bounds");
        return _ownedTokens[owner][index];
    }

    /**
     * @dev See {IERC721Enumerable-totalSupply}.
     */
    function totalSupply() public view virtual override returns (uint256) {
        return _allTokens.length;
    }

    /**
     * @dev See {IERC721Enumerable-tokenByIndex}.
     */
    function tokenByIndex(uint256 index) public view virtual override returns (uint256) {
        require(index < ERC721Enumerable.totalSupply(), "ERC721Enumerable: global index out of bounds");
        return _allTokens[index];
    }

    /**
     * @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` cannot be the zero address.
     * - `to` cannot be the zero address.
     *
     * 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 override {
        super._beforeTokenTransfer(from, to, tokenId);

        if (from == address(0)) {
            _addTokenToAllTokensEnumeration(tokenId);
        } else if (from != to) {
            _removeTokenFromOwnerEnumeration(from, tokenId);
        }
        if (to == address(0)) {
            _removeTokenFromAllTokensEnumeration(tokenId);
        } else if (to != from) {
            _addTokenToOwnerEnumeration(to, tokenId);
        }
    }

    /**
     * @dev Private function to add a token to this extension's ownership-tracking data structures.
     * @param to address representing the new owner of the given token ID
     * @param tokenId uint256 ID of the token to be added to the tokens list of the given address
     */
    function _addTokenToOwnerEnumeration(address to, uint256 tokenId) private {
        uint256 length = ERC721.balanceOf(to);
        _ownedTokens[to][length] = tokenId;
        _ownedTokensIndex[tokenId] = length;
    }

    /**
     * @dev Private function to add a token to this extension's token tracking data structures.
     * @param tokenId uint256 ID of the token to be added to the tokens list
     */
    function _addTokenToAllTokensEnumeration(uint256 tokenId) private {
        _allTokensIndex[tokenId] = _allTokens.length;
        _allTokens.push(tokenId);
    }

    /**
     * @dev Private function to remove a token from this extension's ownership-tracking data structures. Note that
     * while the token is not assigned a new owner, the `_ownedTokensIndex` mapping is _not_ updated: this allows for
     * gas optimizations e.g. when performing a transfer operation (avoiding double writes).
     * This has O(1) time complexity, but alters the order of the _ownedTokens array.
     * @param from address representing the previous owner of the given token ID
     * @param tokenId uint256 ID of the token to be removed from the tokens list of the given address
     */
    function _removeTokenFromOwnerEnumeration(address from, uint256 tokenId) private {
        // To prevent a gap in from's tokens array, we store the last token in the index of the token to delete, and
        // then delete the last slot (swap and pop).

        uint256 lastTokenIndex = ERC721.balanceOf(from) - 1;
        uint256 tokenIndex = _ownedTokensIndex[tokenId];

        // When the token to delete is the last token, the swap operation is unnecessary
        if (tokenIndex != lastTokenIndex) {
            uint256 lastTokenId = _ownedTokens[from][lastTokenIndex];

            _ownedTokens[from][tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
            _ownedTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
        }

        // This also deletes the contents at the last position of the array
        delete _ownedTokensIndex[tokenId];
        delete _ownedTokens[from][lastTokenIndex];
    }

    /**
     * @dev Private function to remove a token from this extension's token tracking data structures.
     * This has O(1) time complexity, but alters the order of the _allTokens array.
     * @param tokenId uint256 ID of the token to be removed from the tokens list
     */
    function _removeTokenFromAllTokensEnumeration(uint256 tokenId) private {
        // To prevent a gap in the tokens array, we store the last token in the index of the token to delete, and
        // then delete the last slot (swap and pop).

        uint256 lastTokenIndex = _allTokens.length - 1;
        uint256 tokenIndex = _allTokensIndex[tokenId];

        // When the token to delete is the last token, the swap operation is unnecessary. However, since this occurs so
        // rarely (when the last minted token is burnt) that we still do the swap here to avoid the gas cost of adding
        // an 'if' statement (like in _removeTokenFromOwnerEnumeration)
        uint256 lastTokenId = _allTokens[lastTokenIndex];

        _allTokens[tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
        _allTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index

        // This also deletes the contents at the last position of the array
        delete _allTokensIndex[tokenId];
        _allTokens.pop();
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "../ERC721.sol";

/**
 * @dev ERC721 token with storage based token URI management.
 */
abstract contract ERC721URIStorage is ERC721 {
    using Strings for uint256;

    // Optional mapping for token URIs
    mapping(uint256 => string) private _tokenURIs;

    /**
     * @dev See {IERC721Metadata-tokenURI}.
     */
    function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
        require(_exists(tokenId), "ERC721URIStorage: URI query for nonexistent token");

        string memory _tokenURI = _tokenURIs[tokenId];
        string memory base = _baseURI();

        // If there is no base URI, return the token URI.
        if (bytes(base).length == 0) {
            return _tokenURI;
        }
        // If both are set, concatenate the baseURI and tokenURI (via abi.encodePacked).
        if (bytes(_tokenURI).length > 0) {
            return string(abi.encodePacked(base, _tokenURI));
        }

        return super.tokenURI(tokenId);
    }

    /**
     * @dev Sets `_tokenURI` as the tokenURI of `tokenId`.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function _setTokenURI(uint256 tokenId, string memory _tokenURI) internal virtual {
        require(_exists(tokenId), "ERC721URIStorage: URI set of nonexistent token");
        _tokenURIs[tokenId] = _tokenURI;
    }

    /**
     * @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 override {
        super._burn(tokenId);

        if (bytes(_tokenURIs[tokenId]).length != 0) {
            delete _tokenURIs[tokenId];
        }
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "../IERC721.sol";

/**
 * @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
 * @dev See https://eips.ethereum.org/EIPS/eip-721
 */
interface IERC721Enumerable is IERC721 {
    /**
     * @dev Returns the total amount of tokens stored by the contract.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns a token ID owned by `owner` at a given `index` of its token list.
     * Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
     */
    function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256 tokenId);

    /**
     * @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
     * Use along with {totalSupply} to enumerate all tokens.
     */
    function tokenByIndex(uint256 index) external view returns (uint256);
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "../IERC721.sol";

/**
 * @title ERC-721 Non-Fungible Token Standard, optional metadata extension
 * @dev See https://eips.ethereum.org/EIPS/eip-721
 */
interface IERC721Metadata is IERC721 {
    /**
     * @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);
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

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

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

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

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");

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

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

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

// SPDX-License-Identifier: MIT

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;
    }
}

// SPDX-License-Identifier: MIT

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);
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "./IERC165.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 ERC165 is IERC165 {
    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IERC165).interfaceId;
    }
}

// SPDX-License-Identifier: MIT

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 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);
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @dev Library for managing
 * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
 * types.
 *
 * Sets have the following properties:
 *
 * - Elements are added, removed, and checked for existence in constant time
 * (O(1)).
 * - Elements are enumerated in O(n). No guarantees are made on the ordering.
 *
 * ```
 * contract Example {
 *     // Add the library methods
 *     using EnumerableSet for EnumerableSet.AddressSet;
 *
 *     // Declare a set state variable
 *     EnumerableSet.AddressSet private mySet;
 * }
 * ```
 *
 * As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`)
 * and `uint256` (`UintSet`) are supported.
 */
library EnumerableSet {
    // To implement this library for multiple types with as little code
    // repetition as possible, we write it in terms of a generic Set type with
    // bytes32 values.
    // The Set implementation uses private functions, and user-facing
    // implementations (such as AddressSet) are just wrappers around the
    // underlying Set.
    // This means that we can only create new EnumerableSets for types that fit
    // in bytes32.

    struct Set {
        // Storage of set values
        bytes32[] _values;
        // Position of the value in the `values` array, plus 1 because index 0
        // means a value is not in the set.
        mapping(bytes32 => uint256) _indexes;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function _add(Set storage set, bytes32 value) private returns (bool) {
        if (!_contains(set, value)) {
            set._values.push(value);
            // The value is stored at length-1, but we add 1 to all indexes
            // and use 0 as a sentinel value
            set._indexes[value] = set._values.length;
            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function _remove(Set storage set, bytes32 value) private returns (bool) {
        // We read and store the value's index to prevent multiple reads from the same storage slot
        uint256 valueIndex = set._indexes[value];

        if (valueIndex != 0) {
            // Equivalent to contains(set, value)
            // To delete an element from the _values array in O(1), we swap the element to delete with the last one in
            // the array, and then remove the last element (sometimes called as 'swap and pop').
            // This modifies the order of the array, as noted in {at}.

            uint256 toDeleteIndex = valueIndex - 1;
            uint256 lastIndex = set._values.length - 1;

            if (lastIndex != toDeleteIndex) {
                bytes32 lastvalue = set._values[lastIndex];

                // Move the last value to the index where the value to delete is
                set._values[toDeleteIndex] = lastvalue;
                // Update the index for the moved value
                set._indexes[lastvalue] = valueIndex; // Replace lastvalue's index to valueIndex
            }

            // Delete the slot where the moved value was stored
            set._values.pop();

            // Delete the index for the deleted slot
            delete set._indexes[value];

            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function _contains(Set storage set, bytes32 value) private view returns (bool) {
        return set._indexes[value] != 0;
    }

    /**
     * @dev Returns the number of values on the set. O(1).
     */
    function _length(Set storage set) private view returns (uint256) {
        return set._values.length;
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function _at(Set storage set, uint256 index) private view returns (bytes32) {
        return set._values[index];
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function _values(Set storage set) private view returns (bytes32[] memory) {
        return set._values;
    }

    // Bytes32Set

    struct Bytes32Set {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(Bytes32Set storage set, bytes32 value) internal returns (bool) {
        return _add(set._inner, value);
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) {
        return _remove(set._inner, value);
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) {
        return _contains(set._inner, value);
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(Bytes32Set storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) {
        return _at(set._inner, index);
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(Bytes32Set storage set) internal view returns (bytes32[] memory) {
        return _values(set._inner);
    }

    // AddressSet

    struct AddressSet {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(AddressSet storage set, address value) internal returns (bool) {
        return _add(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(AddressSet storage set, address value) internal returns (bool) {
        return _remove(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(AddressSet storage set, address value) internal view returns (bool) {
        return _contains(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(AddressSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(AddressSet storage set, uint256 index) internal view returns (address) {
        return address(uint160(uint256(_at(set._inner, index))));
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(AddressSet storage set) internal view returns (address[] memory) {
        bytes32[] memory store = _values(set._inner);
        address[] memory result;

        assembly {
            result := store
        }

        return result;
    }

    // UintSet

    struct UintSet {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(UintSet storage set, uint256 value) internal returns (bool) {
        return _add(set._inner, bytes32(value));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(UintSet storage set, uint256 value) internal returns (bool) {
        return _remove(set._inner, bytes32(value));
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(UintSet storage set, uint256 value) internal view returns (bool) {
        return _contains(set._inner, bytes32(value));
    }

    /**
     * @dev Returns the number of values on the set. O(1).
     */
    function length(UintSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(UintSet storage set, uint256 index) internal view returns (uint256) {
        return uint256(_at(set._inner, index));
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(UintSet storage set) internal view returns (uint256[] memory) {
        bytes32[] memory store = _values(set._inner);
        uint256[] memory result;

        assembly {
            result := store
        }

        return result;
    }
}

//SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import '@openzeppelin/contracts/token/ERC721/extensions/ERC721URIStorage.sol';
import '@openzeppelin/contracts/token/ERC721/extensions/ERC721Burnable.sol';

import './ERC721Ownable.sol';
import './ERC721WithMinters.sol';
import './ERC721WithRoyalties.sol';

/// @title ERC721Full
/// @dev This contains all the different overrides needed on
///      ERC721 / Enumerable / URIStorage / Royalties
/// @author Simon Fremaux (@dievardump)
abstract contract ERC721Full is
    ERC721Ownable,
    ERC721Burnable,
    ERC721URIStorage,
    ERC721WithMinters,
    ERC721WithRoyalties
{
    /*
     * bytes4(keccak256('tokenCreator(uint256)')) == 0x40c1a064
     */
    bytes4 private constant _INTERFACE_TOKEN_CREATOR = 0x40c1a064;

    mapping(uint256 => address) private _tokenIdToCreator;

    /// @notice Helper for the owner to add new minter
    /// @dev needs to be owner
    /// @param newMinters list of new minters
    function addMinters(address[] memory newMinters) public onlyOwner {
        _addMinters(newMinters);
    }

    /// @notice Helper for the owner to remove a minter
    /// @dev needs to be owner
    /// @param removedMinters minters to remove
    function removeMinters(address[] memory removedMinters) public onlyOwner {
        for (uint256 i; i < removedMinters.length; i++) {
            _removeMinter(removedMinters[i]);
        }
    }

    /// @notice gets a token creator address
    /// @param tokenId the token id
    /// @return the creator's address
    function tokenCreator(uint256 tokenId) public view returns (address) {
        require(_exists(tokenId), 'Unknown token.');
        return _tokenIdToCreator[tokenId];
    }

    /// @inheritdoc	ERC165
    function supportsInterface(bytes4 interfaceId)
        public
        view
        virtual
        override(ERC721Enumerable, ERC721, ERC721WithRoyalties)
        returns (bool)
    {
        return
            // Taking this from FND contract
            // hoping this is what makes OpenSea display the creator's name in the description
            // and not the collection creator's name
            interfaceId == _INTERFACE_TOKEN_CREATOR ||
            // or ERC721Enumerable
            ERC721Enumerable.supportsInterface(interfaceId) ||
            // or Royalties
            ERC721WithRoyalties.supportsInterface(interfaceId);
    }

    /// @inheritdoc	ERC721Ownable
    function isApprovedForAll(address owner_, address operator)
        public
        view
        override(ERC721, ERC721Ownable)
        returns (bool)
    {
        return ERC721Ownable.isApprovedForAll(owner_, operator);
    }

    /// @inheritdoc	ERC721URIStorage
    function tokenURI(uint256 tokenId)
        public
        view
        override(ERC721, ERC721URIStorage)
        returns (string memory)
    {
        return ERC721URIStorage.tokenURI(tokenId);
    }

    /// @inheritdoc	ERC721
    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 tokenId
    ) internal override(ERC721, ERC721Enumerable) {
        super._beforeTokenTransfer(from, to, tokenId);
    }

    /// @inheritdoc	ERC721
    function _burn(uint256 tokenId)
        internal
        override(ERC721, ERC721URIStorage)
    {
        // remove royalties
        _removeRoyalty(tokenId);

        // burn ERC721URIStorage
        ERC721URIStorage._burn(tokenId);
    }

    /// @notice internal helper for add minters batch so it can be used in constructor
    function _addMinters(address[] memory newMinters) internal {
        for (uint256 i; i < newMinters.length; i++) {
            _addMinter(newMinters[i]);
        }
    }

    /// @dev sets a token creator
    /// @param tokenId the token id
    /// @param creator the creator's address
    function _setTokenCreator(uint256 tokenId, address creator) internal {
        _tokenIdToCreator[tokenId] = creator;
    }
}

//SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import '@openzeppelin/contracts/access/Ownable.sol';
import '@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol';

import '../OpenSea/BaseOpenSea.sol';

/// @title ERC721Ownable
/// @author Simon Fremaux (@dievardump)
contract ERC721Ownable is Ownable, ERC721Enumerable, BaseOpenSea {
    /// @notice constructor
    /// @param name_ name of the contract (see ERC721)
    /// @param symbol_ symbol of the contract (see ERC721)
    /// @param contractURI_ The contract URI (containing its metadata) - can be empty ""
    /// @param openseaProxyRegistry_ OpenSea's proxy registry to allow gas-less listings - can be address(0)
    /// @param owner_ Address to whom transfer ownership (can be address(0), then owner is deployer)
    constructor(
        string memory name_,
        string memory symbol_,
        string memory contractURI_,
        address openseaProxyRegistry_,
        address owner_
    ) ERC721(name_, symbol_) {
        // set contract uri if present
        if (bytes(contractURI_).length > 0) {
            _setContractURI(contractURI_);
        }

        // set OpenSea proxyRegistry for gas-less trading if present
        if (address(0) != openseaProxyRegistry_) {
            _setOpenSeaRegistry(openseaProxyRegistry_);
        }

        // transferOwnership if needed
        if (address(0) != owner_) {
            transferOwnership(owner_);
        }
    }

    /// @notice Allows gas-less trading on OpenSea by safelisting the Proxy of the user
    /// @dev Override isApprovedForAll to check first if current operator is owner's OpenSea proxy
    /// @inheritdoc	ERC721
    function isApprovedForAll(address owner, address operator)
        public
        view
        virtual
        override
        returns (bool)
    {
        // allows gas less trading on OpenSea
        return
            super.isApprovedForAll(owner, operator) ||
            isOwnersOpenSeaProxy(owner, operator);
    }

    /// @notice Helper for the owner of the contract to set the new contract URI
    /// @dev needs to be owner
    /// @param contractURI_ new contract URI
    function setContractURI(string memory contractURI_) external onlyOwner {
        _setContractURI(contractURI_);
    }

    /// @notice Helper for the owner to set OpenSea's proxy (allowing or not gas-less trading)
    /// @dev needs to be owner
    /// @param osProxyRegistry new opensea proxy registry
    function setOpenSeaRegistry(address osProxyRegistry) external onlyOwner {
        _setOpenSeaRegistry(osProxyRegistry);
    }
}

//SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import '@openzeppelin/contracts/utils/structs/EnumerableSet.sol';

/// @title ERC721WithMinters
/// @author Simon Fremaux (@dievardump)
abstract contract ERC721WithMinters {
    using EnumerableSet for EnumerableSet.AddressSet;

    /// @notice emitted when a new Minter is added
    /// @param minter the minter address
    event MinterAdded(address indexed minter);

    /// @notice emitted when a Minter is removed
    /// @param minter the minter address
    event MinterRemoved(address indexed minter);

    /// @dev This is used internally to allow an address to access the minting function or not
    EnumerableSet.AddressSet private minters;

    /// @notice Helper to know is an address is minter
    /// @param minter the address to check
    function isMinter(address minter) public view returns (bool) {
        return minters.contains(minter);
    }

    /// @notice Helper to list all minters
    /// @return list of minters
    function listMinters() external view returns (address[] memory list) {
        uint256 count = minters.length();
        list = new address[](count);
        for (uint256 i; i < count; i++) {
            list[i] = minters.at(i);
        }
    }

    /// @notice Helper for the owner to add new minter
    /// @param newMinter new signer
    function _addMinter(address newMinter) internal {
        minters.add(newMinter);
        emit MinterAdded(newMinter);
    }

    /// @notice Helper for the owner to remove a minter
    /// @param removedMinter minter to remove
    function _removeMinter(address removedMinter) internal {
        minters.remove(removedMinter);
        emit MinterRemoved(removedMinter);
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import '../Royalties/ERC2981/ERC2981PerTokenRoyalties.sol';
import '../Royalties/RaribleSecondarySales/IRaribleSecondarySales.sol';

/// @dev This is a contract used for royalties on various platforms
/// @author Simon Fremaux (@dievardump)
contract ERC721WithRoyalties is
    ERC2981PerTokenRoyalties,
    IRaribleSecondarySales
{
    /*
     * bytes4(keccak256('getFeeBps(uint256)')) == 0x0ebd4c7f
     * bytes4(keccak256('getFeeRecipients(uint256)')) == 0xb9c4d9fb
     *
     * => 0x0ebd4c7f ^ 0xb9c4d9fb == 0xb7799584
     */
    bytes4 private constant _RARIBLE_FEES_ID = 0xb7799584;

    /// @inheritdoc	ERC165
    function supportsInterface(bytes4 interfaceId)
        public
        view
        virtual
        override
        returns (bool)
    {
        return
            ERC2981PerTokenRoyalties.supportsInterface(interfaceId) ||
            interfaceId == _RARIBLE_FEES_ID;
    }

    /// @inheritdoc	IRaribleSecondarySales
    function getFeeRecipients(uint256 tokenId)
        public
        view
        override
        returns (address payable[] memory recipients)
    {
        // using ERC2981 implementation to get the recipient & amount
        (address recipient, uint256 amount) = _getTokenRoyalty(tokenId);
        if (amount != 0) {
            recipients = new address payable[](1);
            recipients[0] = payable(recipient);
        }
    }

    /// @inheritdoc	IRaribleSecondarySales
    function getFeeBps(uint256 tokenId)
        public
        view
        override
        returns (uint256[] memory fees)
    {
        // using ERC2981 implementation to get the amount
        (, uint256 amount) = _getTokenRoyalty(tokenId);
        if (amount != 0) {
            fees = new uint256[](1);
            fees[0] = amount;
        }
    }
}

//SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

/// @title IMintingStation
/// @author Simon Fremaux (@dievardump)
interface IMintingStation {
    /// @notice helper to know if an address can mint or not
    /// @param operator the address to check
    function canMint(address operator) external returns (bool);

    /// @notice helper to know if everyone can mint or only minters
    /// @return if minting is open to all or not
    function isMintingOpenToAll() external returns (bool);

    /// @notice Toggle minting open to all state
    /// @param isOpen if the new state is open or not
    function setMintingOpenToAll(bool isOpen) external;

    /// @notice Mint one token for msg.sender
    /// @param tokenURI_ the token URI
    /// @param feeRecipient the recipient of royalties
    /// @param feeAmount the royalties amount. From 0 to 10000
    ///        where 10000 == 100.00%; 1000 == 10.00%; 250 == 2.50%
    /// @return the minted tokenId
    function mint(
        string memory tokenURI_,
        address feeRecipient,
        uint256 feeAmount
    ) external returns (uint256);

    /// @notice Mint one token to user `to`
    /// @param to the token recipient
    /// @param tokenURI_ the token URI
    /// @param feeRecipient the recipient of royalties
    /// @param feeAmount the royalties amount. From 0 to 10000
    ///        where 10000 == 100.00%; 1000 == 10.00%; 250 == 2.50%
    /// @return tokenId the minted tokenId
    function mintTo(
        address to,
        string memory tokenURI_,
        address feeRecipient,
        uint256 feeAmount
    ) external returns (uint256 tokenId);

    /// @notice Mint several tokens for msg.sender
    /// @param tokenURIs_ the token URI for each id
    /// @param feeRecipients the recipients of royalties for each id
    /// @param feeAmounts the royalties amounts for each id. From 0 to 10000
    ///        where 10000 == 100.00%; 1000 == 10.00%; 250 == 2.50%
    /// @return all minted tokenIds
    function mintBatch(
        string[] memory tokenURIs_,
        address[] memory feeRecipients,
        uint256[] memory feeAmounts
    ) external returns (uint256[] memory);

    /// @notice Mint one token to user `to`
    /// @param to the token recipient
    /// @param tokenURIs_ the token URI for each id
    /// @param feeRecipients the recipients of royalties for each id
    /// @param feeAmounts the royalties amounts for each id. From 0 to 10000
    ///        where 10000 == 100.00%; 1000 == 10.00%; 250 == 2.50%
    /// @return all minted tokenIds
    function mintBatchTo(
        address to,
        string[] memory tokenURIs_,
        address[] memory feeRecipients,
        uint256[] memory feeAmounts
    ) external returns (uint256[] memory);

    /// @notice Mint one token to user `to`
    /// @param to the token recipient
    /// @param tokenURIs_ the token URI for each id
    /// @param feeRecipients the recipients of royalties for each id
    /// @param feeAmounts the royalties amounts for each id. From 0 to 10000
    ///        where 10000 == 100.00%; 1000 == 10.00%; 250 == 2.50%
    /// @return tokenIds all minted tokenIds
    function mintBatchToMore(
        address[] memory to,
        string[] memory tokenURIs_,
        address[] memory feeRecipients,
        uint256[] memory feeAmounts
    ) external returns (uint256[] memory tokenIds);
}

//SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import './IMintingStation.sol';
import './ERC721Helpers/ERC721Full.sol';

/// @title MintingStation
/// @author Simon Fremaux (@dievardump)
abstract contract MintingStation is IMintingStation, ERC721Full {
    /// @dev This contains the last token id that was created
    uint256 public lastTokenId;

    bool internal _mintingOpenToAll;

    /// @notice modifier allowing only safe listed addresses to mint
    ///         safeListed addresses are all user in the Minter or owner
    modifier onlyMinter(address minter) {
        require(_mintingOpenToAll || canMint(minter), 'Not minter.');
        _;
    }

    /// @notice helper to know if an address can mint or not
    /// @param operator the address to check
    function canMint(address operator)
        public
        view
        virtual
        override
        returns (bool)
    {
        return isMinter(operator) || operator == owner();
    }

    /// @notice helper to know if everyone can mint or only minters
    /// @inheritdoc	IMintingStation
    function isMintingOpenToAll() public view override returns (bool) {
        return _mintingOpenToAll;
    }

    /// @notice Toggle minting open to all state
    /// @param isOpen if the new state is open or not
    /// @inheritdoc	IMintingStation
    function setMintingOpenToAll(bool isOpen) external override onlyOwner {
        _mintingOpenToAll = isOpen;
    }

    /// @dev only a minter can call this
    /// @inheritdoc	IMintingStation
    function mint(
        string memory tokenURI_,
        address royaltiesRecipient,
        uint256 royaltiesAmount
    ) public override onlyMinter(msg.sender) returns (uint256) {
        return
            mintTo(msg.sender, tokenURI_, royaltiesRecipient, royaltiesAmount);
    }

    /// @dev only a minter can call this
    /// @inheritdoc	IMintingStation
    function mintTo(
        address to,
        string memory tokenURI_,
        address royaltiesRecipient,
        uint256 royaltiesAmount
    ) public override onlyMinter(msg.sender) returns (uint256 tokenId) {
        tokenId = lastTokenId + 1;

        // update lastTokenId before _safeMint is called
        lastTokenId = tokenId;

        _mintTo(tokenId, to, tokenURI_, royaltiesRecipient, royaltiesAmount);
    }

    /// @dev only a minter can call this
    /// @inheritdoc	IMintingStation
    function mintBatch(
        string[] memory tokenURIs_,
        address[] memory feeRecipients,
        uint256[] memory feeAmounts
    ) public override onlyMinter(msg.sender) returns (uint256[] memory) {
        return mintBatchTo(msg.sender, tokenURIs_, feeRecipients, feeAmounts);
    }

    /// @dev only a minter can call this
    /// @inheritdoc	IMintingStation
    function mintBatchTo(
        address to,
        string[] memory tokenURIs_,
        address[] memory feeRecipients,
        uint256[] memory feeAmounts
    ) public override onlyMinter(msg.sender) returns (uint256[] memory) {
        // build an array of address with only "to" inside
        uint256 count = tokenURIs_.length;
        address[] memory toBatch = new address[](count);
        for (uint256 i; i < count; i++) {
            toBatch[i] = to;
        }

        return mintBatchToMore(toBatch, tokenURIs_, feeRecipients, feeAmounts);
    }

    /// @dev only a minter can call this
    /// @inheritdoc	IMintingStation
    function mintBatchToMore(
        address[] memory to,
        string[] memory tokenURIs_,
        address[] memory feeRecipients,
        uint256[] memory feeAmounts
    )
        public
        override
        onlyMinter(msg.sender)
        returns (uint256[] memory tokenIds)
    {
        require(
            to.length == tokenURIs_.length &&
                to.length == feeRecipients.length &&
                to.length == feeAmounts.length,
            'Length mismatch'
        );

        uint256 tokenId = lastTokenId;
        uint256 count = tokenURIs_.length;
        tokenIds = new uint256[](count);
        for (uint256 i; i < count; i++) {
            tokenId++;
            _mintTo(
                tokenId,
                to[i],
                tokenURIs_[i],
                feeRecipients[i],
                feeAmounts[i]
            );
            tokenIds[i] = tokenId;
        }

        // update lastTokenId
        lastTokenId = tokenId;
    }

    /// @notice Mint `tokenId` to `to` with `tokenURI_` and `royaltiesRecipient` getting secondary sales
    /// @dev Explain to a developer any extra details
    /// @param tokenId the tokenId to mint
    /// @param to the token recipient
    /// @param tokenURI_ the token URI
    /// @param royaltiesRecipient the recipient of royalties
    /// @param royaltiesAmount the royalties amount. From 0 to 10000
    ///        where 10000 == 100.00%; 1000 == 10.00%; 250 == 2.50%
    function _mintTo(
        uint256 tokenId,
        address to,
        string memory tokenURI_,
        address royaltiesRecipient,
        uint256 royaltiesAmount
    ) internal {
        _safeMint(to, tokenId, '');
        _setTokenURI(tokenId, tokenURI_);
        _setTokenCreator(tokenId, to);

        if (royaltiesAmount > 0) {
            _setTokenRoyalty(tokenId, royaltiesRecipient, royaltiesAmount);
        }
    }
}

//SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

/// @title OpenSea contract helper that defines a few things
/// @author Simon Fremaux (@dievardump)
/// @dev This is a contract used to add OpenSea's
///      gas-less trading and contractURI support
contract BaseOpenSea {
    string private _contractURI;
    ProxyRegistry private _proxyRegistry;

    /// @notice Returns the contract URI function. Used on OpenSea to get details
    //          about a contract (owner, royalties etc...)
    function contractURI() public view returns (string memory) {
        return _contractURI;
    }

    /// @notice Returns the current OS proxyRegistry address registered
    function proxyRegistry() public view returns (address) {
        return address(_proxyRegistry);
    }

    /// @notice Helper for OpenSea gas-less trading
    /// @dev Allows to check if `operator` is owner's OpenSea proxy
    /// @param owner the owner we check for
    /// @param operator the operator (proxy) we check for
    function isOwnersOpenSeaProxy(address owner, address operator)
        public
        view
        returns (bool)
    {
        ProxyRegistry proxyRegistry_ = _proxyRegistry;
        return
            // we have a proxy registry address
            address(proxyRegistry_) != address(0) &&
            // current operator is owner's proxy address
            address(proxyRegistry_.proxies(owner)) == operator;
    }

    /// @dev Internal function to set the _contractURI
    /// @param contractURI_ the new contract uri
    function _setContractURI(string memory contractURI_) internal {
        _contractURI = contractURI_;
    }

    /// @dev Internal function to set the _proxyRegistry
    /// @param proxyRegistryAddress the new proxy registry address
    function _setOpenSeaRegistry(address proxyRegistryAddress) internal {
        _proxyRegistry = ProxyRegistry(proxyRegistryAddress);
    }
}

contract OwnableDelegateProxy {}

contract ProxyRegistry {
    mapping(address => OwnableDelegateProxy) public proxies;
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import '@openzeppelin/contracts/utils/introspection/ERC165.sol';

import './IERC2981Royalties.sol';

/// @dev This is a contract used to add ERC2981 support to ERC721 and 1155
abstract contract ERC2981PerTokenRoyalties is ERC165, IERC2981Royalties {
    struct Royalty {
        address recipient;
        uint256 value;
    }

    mapping(uint256 => Royalty) private _royalties;

    /// @inheritdoc	ERC165
    function supportsInterface(bytes4 interfaceId)
        public
        view
        virtual
        override
        returns (bool)
    {
        return interfaceId == type(IERC2981Royalties).interfaceId;
    }

    /// @dev Sets token royalties
    /// @param id the token id fir which we register the royalties
    function _removeRoyalty(uint256 id) internal {
        delete _royalties[id];
    }

    /// @dev Sets token royalties
    /// @param id the token id fir which we register the royalties
    /// @param recipient recipient of the royalties
    /// @param value percentage (using 2 decimals - 10000 = 100, 0 = 0)
    function _setTokenRoyalty(
        uint256 id,
        address recipient,
        uint256 value
    ) internal {
        require(value <= 10000, 'ERC2981Royalties: Too high');

        _royalties[id] = Royalty(recipient, value);
    }

    /// @dev Gets token royalties
    /// @param id the token id for which we check the royalties
    function _getTokenRoyalty(uint256 id)
        internal
        view
        returns (address, uint256)
    {
        Royalty memory royalty = _royalties[id];
        return (royalty.recipient, royalty.value);
    }

    /// @inheritdoc	IERC2981Royalties
    function royaltyInfo(uint256 tokenId, uint256 value)
        public
        view
        override
        returns (address receiver, uint256 royaltyAmount)
    {
        Royalty memory royalty = _royalties[tokenId];
        return (royalty.recipient, (value * royalty.value) / 10000);
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

/// @title IERC2981Royalties
/// @dev Interface for the ERC2981 - Token Royalty standard
interface IERC2981Royalties {
    /// @notice Called with the sale price to determine how much royalty
    //          is owed and to whom.
    /// @param _tokenId - the NFT asset queried for royalty information
    /// @param _value - the sale price of the NFT asset specified by _tokenId
    /// @return _receiver - address of who should be sent the royalty payment
    /// @return _royaltyAmount - the royalty payment amount for value sale price
    function royaltyInfo(uint256 _tokenId, uint256 _value)
        external
        view
        returns (address _receiver, uint256 _royaltyAmount);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface IRaribleSecondarySales {
    /// @notice returns a list of royalties recipients
    /// @param tokenId the token Id to check for
    /// @return all the recipients for tokenId
    function getFeeRecipients(uint256 tokenId)
        external
        view
        returns (address payable[] memory);

    /// @notice returns a list of royalties amounts
    /// @param tokenId the token Id to check for
    /// @return all the amounts for tokenId
    function getFeeBps(uint256 tokenId)
        external
        view
        returns (uint256[] memory);
}

{
  "evmVersion": "istanbul",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs",
    "useLiteralContent": true
  },
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "remappings": [],
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "abi"
      ]
    }
  }
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[{"internalType":"string","name":"name_","type":"string"},{"internalType":"string","name":"symbol_","type":"string"},{"internalType":"string","name":"contractURI_","type":"string"},{"internalType":"address","name":"openseaProxyRegistry_","type":"address"},{"internalType":"address","name":"owner_","type":"address"},{"internalType":"address[]","name":"minters","type":"address[]"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"approved","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"operator","type":"address"},{"indexed":false,"internalType":"bool","name":"approved","type":"bool"}],"name":"ApprovalForAll","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"minter","type":"address"}],"name":"MinterAdded","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"minter","type":"address"}],"name":"MinterRemoved","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"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":"address[]","name":"newMinters","type":"address[]"}],"name":"addMinters","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"approve","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"burn","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"operator","type":"address"}],"name":"canMint","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"contractURI","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"getApproved","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"getFeeBps","outputs":[{"internalType":"uint256[]","name":"fees","type":"uint256[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"getFeeRecipients","outputs":[{"internalType":"address payable[]","name":"recipients","type":"address[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner_","type":"address"},{"internalType":"address","name":"operator","type":"address"}],"name":"isApprovedForAll","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"minter","type":"address"}],"name":"isMinter","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"isMintingOpenToAll","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"operator","type":"address"}],"name":"isOwnersOpenSeaProxy","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"lastTokenId","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"listMinters","outputs":[{"internalType":"address[]","name":"list","type":"address[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"tokenURI_","type":"string"},{"internalType":"address","name":"royaltiesRecipient","type":"address"},{"internalType":"uint256","name":"royaltiesAmount","type":"uint256"}],"name":"mint","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string[]","name":"tokenURIs_","type":"string[]"},{"internalType":"address[]","name":"feeRecipients","type":"address[]"},{"internalType":"uint256[]","name":"feeAmounts","type":"uint256[]"}],"name":"mintBatch","outputs":[{"internalType":"uint256[]","name":"","type":"uint256[]"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"string[]","name":"tokenURIs_","type":"string[]"},{"internalType":"address[]","name":"feeRecipients","type":"address[]"},{"internalType":"uint256[]","name":"feeAmounts","type":"uint256[]"}],"name":"mintBatchTo","outputs":[{"internalType":"uint256[]","name":"","type":"uint256[]"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address[]","name":"to","type":"address[]"},{"internalType":"string[]","name":"tokenURIs_","type":"string[]"},{"internalType":"address[]","name":"feeRecipients","type":"address[]"},{"internalType":"uint256[]","name":"feeAmounts","type":"uint256[]"}],"name":"mintBatchToMore","outputs":[{"internalType":"uint256[]","name":"tokenIds","type":"uint256[]"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"string","name":"tokenURI_","type":"string"},{"internalType":"address","name":"royaltiesRecipient","type":"address"},{"internalType":"uint256","name":"royaltiesAmount","type":"uint256"}],"name":"mintTo","outputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"ownerOf","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"proxyRegistry","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address[]","name":"removedMinters","type":"address[]"}],"name":"removeMinters","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"uint256","name":"value","type":"uint256"}],"name":"royaltyInfo","outputs":[{"internalType":"address","name":"receiver","type":"address"},{"internalType":"uint256","name":"royaltyAmount","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"safeTransferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"bytes","name":"_data","type":"bytes"}],"name":"safeTransferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"operator","type":"address"},{"internalType":"bool","name":"approved","type":"bool"}],"name":"setApprovalForAll","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"contractURI_","type":"string"}],"name":"setContractURI","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bool","name":"isOpen","type":"bool"}],"name":"setMintingOpenToAll","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"osProxyRegistry","type":"address"}],"name":"setOpenSeaRegistry","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":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"index","type":"uint256"}],"name":"tokenByIndex","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"tokenCreator","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"uint256","name":"index","type":"uint256"}],"name":"tokenOfOwnerByIndex","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"tokenURI","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"transferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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-----Decoded View---------------
Arg [0] : name_ (string): VerticalCrypto Art Auction
Arg [1] : symbol_ (string): VCA
Arg [2] : contractURI_ (string): ipfs://Qmbj3RtiBaGgBHXWEULzvZDGwYx5aCXZkqUVJJ5gQygoYY
Arg [3] : openseaProxyRegistry_ (address): 0xa5409ec958C83C3f309868babACA7c86DCB077c1
Arg [4] : owner_ (address): 0x8dC93807B66A0D47f165591848E8E49F99d6D5AF
Arg [5] : minters (address[]): 0xe4F091560461b441ae8dc1c2dE961E002fAcD59c,0x733983a4c7e778CA9f57cAC6ee361c4A9b24E4b1,0x14287e62B859A3A5E19B3C2D59Ed1F12ac94ba4c,0x06Ed63eaC05A4b2C2f4D383257927B644DC801Cf,0x5Fae9D4B591f213b3bA75287f2cfAc0883D17f7A,0x2192F2eaBa393112e81F2BBf9dc414Dd649Ac7B5,0xd743B27D75A6DcDB34baFc6De0Acb8cecB3aC43F,0x576a655161B5502dCf40602BE1f3519A89b71658,0xDD6CB36A0c22FDB2Abc5e2EC9D96Db68c29F69de

-----Encoded View---------------
23 Constructor Arguments found :
Arg [0] : 00000000000000000000000000000000000000000000000000000000000000c0
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000100
Arg [2] : 0000000000000000000000000000000000000000000000000000000000000140
Arg [3] : 000000000000000000000000a5409ec958c83c3f309868babaca7c86dcb077c1
Arg [4] : 0000000000000000000000008dc93807b66a0d47f165591848e8e49f99d6d5af
Arg [5] : 00000000000000000000000000000000000000000000000000000000000001a0
Arg [6] : 000000000000000000000000000000000000000000000000000000000000001a
Arg [7] : 566572746963616c43727970746f204172742041756374696f6e000000000000
Arg [8] : 0000000000000000000000000000000000000000000000000000000000000003
Arg [9] : 5643410000000000000000000000000000000000000000000000000000000000
Arg [10] : 0000000000000000000000000000000000000000000000000000000000000035
Arg [11] : 697066733a2f2f516d626a33527469426147674248585745554c7a765a444777
Arg [12] : 5978356143585a6b7155564a4a35675179676f59590000000000000000000000
Arg [13] : 0000000000000000000000000000000000000000000000000000000000000009
Arg [14] : 000000000000000000000000e4f091560461b441ae8dc1c2de961e002facd59c
Arg [15] : 000000000000000000000000733983a4c7e778ca9f57cac6ee361c4a9b24e4b1
Arg [16] : 00000000000000000000000014287e62b859a3a5e19b3c2d59ed1f12ac94ba4c
Arg [17] : 00000000000000000000000006ed63eac05a4b2c2f4d383257927b644dc801cf
Arg [18] : 0000000000000000000000005fae9d4b591f213b3ba75287f2cfac0883d17f7a
Arg [19] : 0000000000000000000000002192f2eaba393112e81f2bbf9dc414dd649ac7b5
Arg [20] : 000000000000000000000000d743b27d75a6dcdb34bafc6de0acb8cecb3ac43f
Arg [21] : 000000000000000000000000576a655161b5502dcf40602be1f3519a89b71658
Arg [22] : 000000000000000000000000dd6cb36a0c22fdb2abc5e2ec9d96db68c29f69de