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// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)

pragma solidity ^0.8.0;

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

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

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

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }

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

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

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

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/ERC721.sol)

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 overridden 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 {
        _setApprovalForAll(_msgSender(), operator, approved);
    }

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

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

        _transfer(from, to, tokenId);
    }

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

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

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

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

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

        _afterTokenTransfer(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);

        _afterTokenTransfer(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 from incorrect owner");
        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);

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

    /**
     * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
     * The call is not executed if the target address is not a contract.
     *
     * @param from address representing the previous owner of the given token ID
     * @param to target address that will receive the tokens
     * @param tokenId uint256 ID of the token to be transferred
     * @param _data bytes optional data to send along with the call
     * @return bool whether the call correctly returned the expected magic value
     */
    function _checkOnERC721Received(
        address from,
        address to,
        uint256 tokenId,
        bytes memory _data
    ) private returns (bool) {
        if (to.isContract()) {
            try 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 {}

    /**
     * @dev Hook that is called after any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _afterTokenTransfer(
        address from,
        address to,
        uint256 tokenId
    ) internal virtual {}
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721.sol)

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`.
     *
     * 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;

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

    /**
     * @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);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721Receiver.sol)

pragma solidity ^0.8.0;

/**
 * @title ERC721 token receiver interface
 * @dev Interface for any contract that wants to support safeTransfers
 * from ERC721 asset contracts.
 */
interface 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 `IERC721Receiver.onERC721Received.selector`.
     */
    function onERC721Received(
        address operator,
        address from,
        uint256 tokenId,
        bytes calldata data
    ) external returns (bytes4);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)

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
// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @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
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 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
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Strings.sol)

pragma solidity ^0.8.0;

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

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

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)

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
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[EIP].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface 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 >=0.6.0;

/// @title Base64
/// @author Brecht Devos - <[email protected]>
/// @notice Provides functions for encoding/decoding base64
library Base64 {
    string internal constant TABLE_ENCODE = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
    bytes  internal constant TABLE_DECODE = hex"0000000000000000000000000000000000000000000000000000000000000000"
                                            hex"00000000000000000000003e0000003f3435363738393a3b3c3d000000000000"
                                            hex"00000102030405060708090a0b0c0d0e0f101112131415161718190000000000"
                                            hex"001a1b1c1d1e1f202122232425262728292a2b2c2d2e2f303132330000000000";

    function encode(bytes memory data) internal pure returns (string memory) {
        if (data.length == 0) return '';

        // load the table into memory
        string memory table = TABLE_ENCODE;

        // multiply by 4/3 rounded up
        uint256 encodedLen = 4 * ((data.length + 2) / 3);

        // add some extra buffer at the end required for the writing
        string memory result = new string(encodedLen + 32);

        assembly {
            // set the actual output length
            mstore(result, encodedLen)

            // prepare the lookup table
            let tablePtr := add(table, 1)

            // input ptr
            let dataPtr := data
            let endPtr := add(dataPtr, mload(data))

            // result ptr, jump over length
            let resultPtr := add(result, 32)

            // run over the input, 3 bytes at a time
            for {} lt(dataPtr, endPtr) {}
            {
                // read 3 bytes
                dataPtr := add(dataPtr, 3)
                let input := mload(dataPtr)

                // write 4 characters
                mstore8(resultPtr, mload(add(tablePtr, and(shr(18, input), 0x3F))))
                resultPtr := add(resultPtr, 1)
                mstore8(resultPtr, mload(add(tablePtr, and(shr(12, input), 0x3F))))
                resultPtr := add(resultPtr, 1)
                mstore8(resultPtr, mload(add(tablePtr, and(shr( 6, input), 0x3F))))
                resultPtr := add(resultPtr, 1)
                mstore8(resultPtr, mload(add(tablePtr, and(        input,  0x3F))))
                resultPtr := add(resultPtr, 1)
            }

            // padding with '='
            switch mod(mload(data), 3)
            case 1 { mstore(sub(resultPtr, 2), shl(240, 0x3d3d)) }
            case 2 { mstore(sub(resultPtr, 1), shl(248, 0x3d)) }
        }

        return result;
    }

    function decode(string memory _data) internal pure returns (bytes memory) {
        bytes memory data = bytes(_data);

        if (data.length == 0) return new bytes(0);
        require(data.length % 4 == 0, "invalid base64 decoder input");

        // load the table into memory
        bytes memory table = TABLE_DECODE;

        // every 4 characters represent 3 bytes
        uint256 decodedLen = (data.length / 4) * 3;

        // add some extra buffer at the end required for the writing
        bytes memory result = new bytes(decodedLen + 32);

        assembly {
            // padding with '='
            let lastBytes := mload(add(data, mload(data)))
            if eq(and(lastBytes, 0xFF), 0x3d) {
                decodedLen := sub(decodedLen, 1)
                if eq(and(lastBytes, 0xFFFF), 0x3d3d) {
                    decodedLen := sub(decodedLen, 1)
                }
            }

            // set the actual output length
            mstore(result, decodedLen)

            // prepare the lookup table
            let tablePtr := add(table, 1)

            // input ptr
            let dataPtr := data
            let endPtr := add(dataPtr, mload(data))

            // result ptr, jump over length
            let resultPtr := add(result, 32)

            // run over the input, 4 characters at a time
            for {} lt(dataPtr, endPtr) {}
            {
               // read 4 characters
               dataPtr := add(dataPtr, 4)
               let input := mload(dataPtr)

               // write 3 bytes
               let output := add(
                   add(
                       shl(18, and(mload(add(tablePtr, and(shr(24, input), 0xFF))), 0xFF)),
                       shl(12, and(mload(add(tablePtr, and(shr(16, input), 0xFF))), 0xFF))),
                   add(
                       shl( 6, and(mload(add(tablePtr, and(shr( 8, input), 0xFF))), 0xFF)),
                               and(mload(add(tablePtr, and(        input , 0xFF))), 0xFF)
                    )
                )
                mstore(resultPtr, shl(232, output))
                resultPtr := add(resultPtr, 3)
            }
        }

        return result;
    }
}

//SPDX-License-Identifier: GPL-3.0
pragma solidity 0.8.15;

import { ERC721K } from "./ERC721K.sol";
import { ERC721Storage } from "./ERC721Storage.sol";
import { ENounsRender } from "./ENounsRender.sol";
import { NameEncoder } from "./libraries/NameEncoder.sol";
import { IENSReverseRecords } from "./interfaces/IENSReverseRecords.sol";

/**
 * @title eNouns
 * @author Kames Geraghty
 * @notice Ethereum Noun System;  one Noun for every Primary ENS Name.
 */
contract ENouns is ERC721K {
  using NameEncoder for string;

  /// @notice ENSReverseRecords instance
  address private _ensReverseRecords;

  /// @notice Reverse lookup of a tokenId using the owner address
  mapping(address => uint256) private _userToTokenId;

  /// @notice TokenID mapped to ENS domain node i.e. Nouns seedEntropy
  mapping(uint256 => bytes32) internal _tokenIdToEnsNode;

  /// @notice ENS node mapped to Owner address
  mapping(bytes32 => address) internal _ensReverseRecordsMap;

  event EnsReverseRecordsUpdated(address ensReverseRecords);

  /**
   * @notice ENouns Construction
   * @param name string - Name of ERC721 token
   * @param symbol string - Symbol of ERC721 token
   * @param erc721Storage address - ERC721Storage instance
   * @param ensReverseRecords address - ENSReverseRecords instance
   */
  constructor(
    string memory name,
    string memory symbol,
    address erc721Storage,
    address ensReverseRecords
  ) ERC721K(name, symbol, erc721Storage) {
    _ensReverseRecords = ensReverseRecords;
  }

  receive() external payable {
    _checkAndIssue(_msgSender());
  }

  /* ===================================================================================== */
  /* External Functions                                                                    */
  /* ===================================================================================== */

  function getEnsReverseRecords() external view returns (address) {
    return _ensReverseRecords;
  }

  function getId(address user) external view returns (uint256) {
    return _userToTokenId[user];
  }

  function isOwner(address user) external view returns (bool) {
    return _userToTokenId[user] > 0 ? true : false;
  }

  function preview(address user) external view returns (string memory) {
    return ENounsRender(ERC721Storage(_erc721Storage).getSvgRender()).renderUsingAddress(user);
  }

  function previewUsingEnsName(string memory name) external view returns (string memory) {
    return ENounsRender(ERC721Storage(_erc721Storage).getSvgRender()).renderUsingEnsName(name);
  }

  function claim() external payable {
    _checkAndIssue(_msgSender());
  }

  function setEnsReverseRecords(address _ensReverseRecords) external onlyOwner {
    _ensReverseRecords = _ensReverseRecords;
    emit EnsReverseRecordsUpdated(_ensReverseRecords);
  }

  function transferFrom(
    address from,
    address to,
    uint256 tokenId
  ) public virtual override {
    if (from == address(0)) {
      _issue(to, ++_idCounter);
    } else {
      require(balanceOf(to) == 0, "ENouns:current-holder");
      _reissue(from, to, tokenId);
    }
  }

  function withdraw(uint256 amount) external onlyOwner {
    (bool _success, ) = _msgSender().call{ value: amount }("");
    require(_success, "ENouns:uh-oh");
  }

  /* ===================================================================================== */
  /* Internal Functions                                                                    */
  /* ===================================================================================== */

  function _checkAndIssue(address _sender) internal {
    if (balanceOf(_sender) == 0) {
      unchecked {
        _issue(_sender, ++_idCounter); /// @dev 🤯
      }
    } else {
      revert("ENouns:prev-issued");
    }
  }

  function _tokenData(uint256 tokenId)
    internal
    view
    virtual
    override
    returns (bytes memory, bytes memory)
  {
    bytes memory ensNode = bytes(abi.encode(_tokenIdToEnsNode[tokenId]));
    bytes memory ownerEncoded_ = bytes(abi.encode(ownerOf(tokenId)));
    return (ensNode, ownerEncoded_);
  }

  function _encodeName(string memory _name) internal pure returns (bytes32) {
    (, bytes32 _node) = _name.dnsEncodeName();
    return _node;
  }

  function _reverseName(address _address) internal view returns (string memory) {
    address[] memory lookup_ = new address[](1);
    lookup_[0] = _address;
    return IENSReverseRecords(_ensReverseRecords).getNames(lookup_)[0];
  }

  function _issue(address _to, uint256 _tokenId) internal returns (uint256) {
    bytes32 node = _encodeName(_reverseName(_to));
    require(node != "", "ENouns:invalid-ens-node");
    require(_ensReverseRecordsMap[node] == address(0), "eNouns:prev-issued");
    _mint(_to, _tokenId);
    _userToTokenId[_to] = _tokenId;
    _tokenIdToEnsNode[_tokenId] = node;
    _ensReverseRecordsMap[node] = _to;
    return _tokenId;
  }

  function _reissue(
    address _from,
    address _to,
    uint256 _tokenId
  ) internal returns (uint256) {
    require(_ensReverseRecordsMap[_encodeName(_reverseName(_to))] == _from, "eNouns:invalid-ens");
    bytes32 node = _tokenIdToEnsNode[_tokenId];
    _transfer(_from, _to, _tokenId);
    _userToTokenId[_from] = 0;
    _userToTokenId[_to] = _tokenId;
    _ensReverseRecordsMap[node] = _to;
  }
}

// SPDX-License-Identifier: GPL-3.0
pragma solidity 0.8.15;

import { Ownable } from "@openzeppelin/contracts/access/Ownable.sol";
import { NameEncoder } from "./libraries/NameEncoder.sol";
import { IENSReverseRecords } from "./interfaces/IENSReverseRecords.sol";
import { INounsDescriptor } from "./interfaces/INounsDescriptor.sol";
import { INounsSeeder } from "./interfaces/INounsSeeder.sol";

contract ENounsRender is Ownable {
  using NameEncoder for string;

  string private constant ENCODING = "data:image/svg+xml;base64,";

  /// @notice NounsDescriptor instance
  address private immutable _nounsDescriptor;

  /// @notice ENSReverseRecords instance
  address private immutable _ensReverseRecords;

  constructor(address nounsDescriptor, address ensReverseRecords) public {
    _nounsDescriptor = nounsDescriptor;
    _ensReverseRecords = ensReverseRecords;
  }

  /* ===================================================================================== */
  /* External Functions                                                                    */
  /* ===================================================================================== */

  function render(bytes memory input) external view returns (string memory) {
    bytes32 _seedEntropy = abi.decode(input, (bytes32));
    return
      string.concat(
        ENCODING,
        INounsDescriptor(_nounsDescriptor).generateSVGImage(_generateSeed(uint256(_seedEntropy)))
      );
  }

  function renderUsingAddress(address user) external view returns (string memory) {
    return
      string.concat(
        ENCODING,
        INounsDescriptor(_nounsDescriptor).generateSVGImage(
          _generateSeed(_generateInputFromAddress(user))
        )
      );
  }

  function renderUsingEnsName(string memory ensName) external view returns (string memory) {
    return
      string.concat(
        ENCODING,
        INounsDescriptor(_nounsDescriptor).generateSVGImage(
          _generateSeed(_generateInputFromName(ensName))
        )
      );
  }

  /* ===================================================================================== */
  /* Internal Functions                                                                    */
  /* ===================================================================================== */

  function _generateInputFromAddress(address _address) internal view returns (uint256) {
    string memory toEnsName_ = _reverseName(_address);
    return uint256(_encodeName(toEnsName_));
  }

  function _generateInputFromSeed(bytes32 _seed) internal view returns (uint256) {
    return uint256(_seed);
  }

  function _generateInputFromName(string memory _ensName) internal pure returns (uint256) {
    return uint256(_encodeName(_ensName));
  }

  function _encodeName(string memory _name) internal pure returns (bytes32) {
    (, bytes32 _node) = _name.dnsEncodeName();
    return _node;
  }

  function _reverseName(address _address) internal view returns (string memory) {
    address[] memory t = new address[](1);
    t[0] = _address;
    return IENSReverseRecords(_ensReverseRecords).getNames(t)[0];
  }

  function _generateSeed(uint256 _pseudorandomness)
    private
    view
    returns (INounsSeeder.Seed memory)
  {
    uint256 backgroundCount = INounsDescriptor(_nounsDescriptor).backgroundCount();
    uint256 bodyCount = INounsDescriptor(_nounsDescriptor).bodyCount();
    uint256 accessoryCount = INounsDescriptor(_nounsDescriptor).accessoryCount();
    uint256 headCount = INounsDescriptor(_nounsDescriptor).headCount();
    uint256 glassesCount = INounsDescriptor(_nounsDescriptor).glassesCount();

    return
      INounsSeeder.Seed({
        background: uint48(uint48(_pseudorandomness) % backgroundCount),
        body: uint48(uint48(_pseudorandomness >> 48) % bodyCount),
        accessory: uint48(uint48(_pseudorandomness >> 96) % accessoryCount),
        head: uint48(uint48(_pseudorandomness >> 144) % headCount),
        glasses: uint48(uint48(_pseudorandomness >> 192) % glassesCount)
      });
  }

  function generate(uint256 _tokenId, string memory _alias) public view returns (string memory) {
    return string("");
  }
}

//SPDX-License-Identifier: MIT
pragma solidity 0.8.15;

import { Ownable } from "@openzeppelin/contracts/access/Ownable.sol";
import { ERC721 } from "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import { ERC721Storage } from "./ERC721Storage.sol";

/**
 * @title ERC721K
 * @author Kames Geraghty
 */
abstract contract ERC721K is ERC721, Ownable {
  /// @notice ID counter for ERC721 tokens
  uint256 internal _idCounter;

  /// @notice ENSReverseRecords instance
  address internal _erc721Storage;

  event ERC721StorageUpdated(address erc721Storage);

  /**
   * @notice ERC721K Construction
   * @param name_ string - Name of ERC721 token
   * @param symbol_ string - Symbol of ERC721 token
   * @param _erc721Storage_ address - Metadata instance
   */
  constructor(
    string memory name_,
    string memory symbol_,
    address _erc721Storage_
  ) ERC721(name_, symbol_) {
    _erc721Storage = _erc721Storage_;
  }

  /* ===================================================================================== */
  /* Virtual Functions                                                                     */
  /* ===================================================================================== */
  function _tokenData(uint256 tokenId)
    internal
    view
    virtual
    returns (bytes memory output0_, bytes memory output1_);

  /* ===================================================================================== */
  /* External Functions                                                                    */
  /* ===================================================================================== */

  function contractURI() external view returns (string memory) {
    return ERC721Storage(_erc721Storage).constructContractURI();
  }

  function totalSupply() external view returns (uint256) {
    return _idCounter;
  }

  function getERC721Storage() external view returns (address) {
    return _erc721Storage;
  }

  function tokenURI(uint256 tokenId) public view override returns (string memory) {
    (bytes memory input0, bytes memory input1) = _tokenData(tokenId);
    return ERC721Storage(_erc721Storage).constructTokenURI(tokenId, input0, input1);
  }

  function setStorage(address erc721Storage) external onlyOwner {
    _erc721Storage = erc721Storage;
    emit ERC721StorageUpdated(erc721Storage);
  }

  function supportsInterface(bytes4 interfaceId)
    public
    view
    virtual
    override(ERC721)
    returns (bool)
  {
    return super.supportsInterface(interfaceId);
  }
}

// SPDX-License-Identifier: GPL-3.0
pragma solidity 0.8.15;

import { Base64 } from "base64-sol/base64.sol";
import { Ownable } from "@openzeppelin/contracts/access/Ownable.sol";
import { ISVGRender } from "./interfaces/ISVGRender.sol";
import { ITraitsFetch } from "./interfaces/ITraitsFetch.sol";
import { Strings } from "@openzeppelin/contracts/utils/Strings.sol";

/**
 * @title ERC721Storage
 * @author Kames Geraghty
 */
abstract contract ERC721Storage is Ownable {
  address internal _svgRender;
  address internal _traitsFetch;
  ContractURI internal _contractURI;

  struct ContractURI {
    string name;
    string description;
    string image;
    string externalLink;
    string sellerFeeBasisPoints;
    string feeRecipient;
  }

  event SvgRenderUpdated(address svgRender);

  event TraitsFetchUpdated(address traitsFetch);

  event ContractURIUpdated(ContractURI contractURI);

  constructor(
    address _svgRender_,
    address _traitsFetch_,
    ContractURI memory _contractURI_
  ) {
    _svgRender = _svgRender_;
    _traitsFetch = _traitsFetch_;
    _contractURI = _contractURI_;
  }

  /* ===================================================================================== */
  /* Virtual Functions                                                                     */
  /* ===================================================================================== */

  function _parseName(uint256 _tokenId) internal view virtual returns (string memory);

  function _parseDescription(uint256 _tokenId) internal view virtual returns (string memory);

  /* ===================================================================================== */
  /* External Functions                                                                    */
  /* ===================================================================================== */
  function getSvgRender() external view returns (address) {
    return _svgRender;
  }

  function getTraitsFetch() external view returns (address) {
    return _traitsFetch;
  }

  function getContractDescription() external view returns (ContractURI memory) {
    return _contractURI;
  }

  function preview(bytes memory input) external view returns (string memory) {
    return ISVGRender(_svgRender).render(input);
  }

  function constructTokenURI(
    uint256 tokenId,
    bytes memory input0,
    bytes memory input1
  ) external view returns (string memory uri) {
    string memory image_ = ISVGRender(_svgRender).render(input0);
    string memory traits_ = ITraitsFetch(_traitsFetch).fetch(input1);
    return
      string(
        abi.encodePacked(
          "data:application/json;base64,",
          Base64.encode(
            bytes(
              string.concat(
                '{"name":',
                '"',
                _parseName(tokenId),
                '",',
                '"description":',
                '"',
                _parseDescription(tokenId),
                '",',
                '"image":',
                '"',
                image_,
                '",',
                '"attributes": [',
                traits_,
                "]",
                "}"
              )
            )
          )
        )
      );
  }

  function constructContractURI() external view returns (string memory uri) {
    return
      string(
        abi.encodePacked(
          "data:application/json;base64,",
          Base64.encode(
            bytes(
              string.concat(
                '{"name":',
                '"',
                _contractURI.name,
                '",',
                '"description":',
                '"',
                _contractURI.description,
                '",',
                '"image":',
                '"',
                _contractURI.image,
                '",',
                '"externalLink":',
                '"',
                _contractURI.externalLink,
                '",',
                '"sellerFeeBasisPoints":',
                '"',
                _contractURI.sellerFeeBasisPoints,
                '",',
                '"feeRecipient":',
                '"',
                _contractURI.feeRecipient,
                '"',
                "}"
              )
            )
          )
        )
      );
  }

  function setSvgRender(address svgRender) external onlyOwner {
    _svgRender = svgRender;
    emit SvgRenderUpdated(svgRender);
  }

  function setTraitsFetch(address traitsFetch) external onlyOwner {
    _traitsFetch = traitsFetch;
    emit TraitsFetchUpdated(traitsFetch);
  }

  function setContractURI(ContractURI memory contractURI) external onlyOwner {
    _contractURI = contractURI;
    emit ContractURIUpdated(contractURI);
  }
}

// SPDX-License-Identifier: GPL-3.0

pragma solidity ^0.8.6;

abstract contract IENSReverseRecords {
    function getNames(address[] calldata addresses) external view virtual returns (string[] memory r);
}

// SPDX-License-Identifier: GPL-3.0

/// @title Interface for NounsDescriptor

/*********************************
 * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
 * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
 * ░░░░░░█████████░░█████████░░░ *
 * ░░░░░░██░░░████░░██░░░████░░░ *
 * ░░██████░░░████████░░░████░░░ *
 * ░░██░░██░░░████░░██░░░████░░░ *
 * ░░██░░██░░░████░░██░░░████░░░ *
 * ░░░░░░█████████░░█████████░░░ *
 * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
 * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
 *********************************/

pragma solidity ^0.8.6;

import { INounsSeeder } from './INounsSeeder.sol';

interface INounsDescriptor {
    event PartsLocked();

    event DataURIToggled(bool enabled);

    event BaseURIUpdated(string baseURI);

    function arePartsLocked() external returns (bool);

    function isDataURIEnabled() external returns (bool);

    function baseURI() external returns (string memory);

    function palettes(uint8 paletteIndex, uint256 colorIndex) external view returns (string memory);

    function backgrounds(uint256 index) external view returns (string memory);

    function bodies(uint256 index) external view returns (bytes memory);

    function accessories(uint256 index) external view returns (bytes memory);

    function heads(uint256 index) external view returns (bytes memory);

    function glasses(uint256 index) external view returns (bytes memory);

    function backgroundCount() external view returns (uint256);

    function bodyCount() external view returns (uint256);

    function accessoryCount() external view returns (uint256);

    function headCount() external view returns (uint256);

    function glassesCount() external view returns (uint256);

    function addManyColorsToPalette(uint8 paletteIndex, string[] calldata newColors) external;

    function addManyBackgrounds(string[] calldata backgrounds) external;

    function addManyBodies(bytes[] calldata bodies) external;

    function addManyAccessories(bytes[] calldata accessories) external;

    function addManyHeads(bytes[] calldata heads) external;

    function addManyGlasses(bytes[] calldata glasses) external;

    function addColorToPalette(uint8 paletteIndex, string calldata color) external;

    function addBackground(string calldata background) external;

    function addBody(bytes calldata body) external;

    function addAccessory(bytes calldata accessory) external;

    function addHead(bytes calldata head) external;

    function addGlasses(bytes calldata glasses) external;

    function lockParts() external;

    function toggleDataURIEnabled() external;

    function setBaseURI(string calldata baseURI) external;

    function tokenURI(uint256 tokenId, INounsSeeder.Seed memory seed) external view returns (string memory);

    function dataURI(uint256 tokenId, INounsSeeder.Seed memory seed) external view returns (string memory);

    function genericDataURI(
        string calldata name,
        string calldata description,
        INounsSeeder.Seed memory seed
    ) external view returns (string memory);

    function generateSVGImage(INounsSeeder.Seed memory seed) external view returns (string memory);
}

// SPDX-License-Identifier: GPL-3.0

/// @title Interface for NounsSeeder

/*********************************
 * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
 * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
 * ░░░░░░█████████░░█████████░░░ *
 * ░░░░░░██░░░████░░██░░░████░░░ *
 * ░░██████░░░████████░░░████░░░ *
 * ░░██░░██░░░████░░██░░░████░░░ *
 * ░░██░░██░░░████░░██░░░████░░░ *
 * ░░░░░░█████████░░█████████░░░ *
 * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
 * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
 *********************************/

pragma solidity ^0.8.6;

import { INounsDescriptor } from './INounsDescriptor.sol';

interface INounsSeeder {
    struct Seed {
        uint48 background;
        uint48 body;
        uint48 accessory;
        uint48 head;
        uint48 glasses;
    }

    function generateSeed(uint256 nounId, INounsDescriptor descriptor) external view returns (Seed memory);
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.15;

interface ISVGRender {
  function render(bytes memory input) external view returns (string memory);
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.15;

interface ITraitsFetch {
  function fetch(bytes memory input) external view returns (string memory);
}

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

library BytesUtils {
  /*
   * @dev Returns the keccak-256 hash of a byte range.
   * @param self The byte string to hash.
   * @param offset The position to start hashing at.
   * @param len The number of bytes to hash.
   * @return The hash of the byte range.
   */
  function keccak(
    bytes memory self,
    uint256 offset,
    uint256 len
  ) internal pure returns (bytes32 ret) {
    require(offset + len <= self.length);
    assembly {
      ret := keccak256(add(add(self, 32), offset), len)
    }
  }

  /**
   * @dev Returns the ENS namehash of a DNS-encoded name.
   * @param self The DNS-encoded name to hash.
   * @param offset The offset at which to start hashing.
   * @return The namehash of the name.
   */
  function namehash(bytes memory self, uint256 offset) internal pure returns (bytes32) {
    (bytes32 labelhash, uint256 newOffset) = readLabel(self, offset);
    if (labelhash == bytes32(0)) {
      require(offset == self.length - 1, "namehash: Junk at end of name");
      return bytes32(0);
    }
    return keccak256(abi.encodePacked(namehash(self, newOffset), labelhash));
  }

  /**
   * @dev Returns the keccak-256 hash of a DNS-encoded label, and the offset to the start of the next label.
   * @param self The byte string to read a label from.
   * @param idx The index to read a label at.
   * @return labelhash The hash of the label at the specified index, or 0 if it is the last label.
   * @return newIdx The index of the start of the next label.
   */
  function readLabel(bytes memory self, uint256 idx)
    internal
    pure
    returns (bytes32 labelhash, uint256 newIdx)
  {
    require(idx < self.length, "readLabel: Index out of bounds");
    uint256 len = uint256(uint8(self[idx]));
    if (len > 0) {
      labelhash = keccak(self, idx + 1, len);
    } else {
      labelhash = bytes32(0);
    }
    newIdx = idx + len + 1;
  }
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.15;

import "./BytesUtils.sol";

library NameEncoder {
  using BytesUtils for bytes;

  function dnsEncodeName(string memory name)
    internal
    pure
    returns (bytes memory dnsName, bytes32 node)
  {
    uint8 labelLength = 0;
    bytes memory bytesName = bytes(name);
    uint256 length = bytesName.length;
    dnsName = new bytes(length + 2);
    node = 0;
    if (length == 0) {
      dnsName[0] = 0;
      return (dnsName, node);
    }

    // use unchecked to save gas since we check for an underflow
    // and we check for the length before the loop
    unchecked {
      for (uint256 i = length - 1; i >= 0; i--) {
        if (bytesName[i] == ".") {
          dnsName[i + 1] = bytes1(labelLength);
          node = keccak256(abi.encodePacked(node, bytesName.keccak(i + 1, labelLength)));
          labelLength = 0;
        } else {
          labelLength += 1;
          dnsName[i + 1] = bytesName[i];
        }
        if (i == 0) {
          break;
        }
      }
    }

    node = keccak256(abi.encodePacked(node, bytesName.keccak(0, labelLength)));

    dnsName[0] = bytes1(labelLength);
    return (dnsName, node);
  }
}

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

• No Contract Security Audit Submitted- Submit Audit Here

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

-----Decoded View---------------
Arg [0] : name (string): Ethereum Nouns System
Arg [1] : symbol (string): eNouns
Arg [2] : erc721Storage (address): 0x0A3895005C766DBF9c3aef8c953a156F4a0A0988
Arg [3] : ensReverseRecords (address): 0x3671aE578E63FdF66ad4F3E12CC0c0d71Ac7510C

-----Encoded View---------------
8 Constructor Arguments found :
Arg [0] : 0000000000000000000000000000000000000000000000000000000000000080
Arg [1] : 00000000000000000000000000000000000000000000000000000000000000c0
Arg [2] : 0000000000000000000000000a3895005c766dbf9c3aef8c953a156f4a0a0988
Arg [3] : 0000000000000000000000003671ae578e63fdf66ad4f3e12cc0c0d71ac7510c
Arg [4] : 0000000000000000000000000000000000000000000000000000000000000015
Arg [5] : 457468657265756d204e6f756e732053797374656d0000000000000000000000
Arg [6] : 0000000000000000000000000000000000000000000000000000000000000006
Arg [7] : 654e6f756e730000000000000000000000000000000000000000000000000000