////// SPDX-License-Identifier-FLATTEN-SUPPRESS-WARNING: 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-FLATTEN-SUPPRESS-WARNING: 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-FLATTEN-SUPPRESS-WARNING: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC1155/IERC1155Receiver.sol)

pragma solidity ^0.8.0;

////import "../../utils/introspection/IERC165.sol";

/**
 * @dev _Available since v3.1._
 */
interface IERC1155Receiver is IERC165 {
    /**
     * @dev Handles the receipt of a single ERC1155 token type. This function is
     * called at the end of a `safeTransferFrom` after the balance has been updated.
     *
     * NOTE: To accept the transfer, this must return
     * `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))`
     * (i.e. 0xf23a6e61, or its own function selector).
     *
     * @param operator The address which initiated the transfer (i.e. msg.sender)
     * @param from The address which previously owned the token
     * @param id The ID of the token being transferred
     * @param value The amount of tokens being transferred
     * @param data Additional data with no specified format
     * @return `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))` if transfer is allowed
     */
    function onERC1155Received(
        address operator,
        address from,
        uint256 id,
        uint256 value,
        bytes calldata data
    ) external returns (bytes4);

    /**
     * @dev Handles the receipt of a multiple ERC1155 token types. This function
     * is called at the end of a `safeBatchTransferFrom` after the balances have
     * been updated.
     *
     * NOTE: To accept the transfer(s), this must return
     * `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))`
     * (i.e. 0xbc197c81, or its own function selector).
     *
     * @param operator The address which initiated the batch transfer (i.e. msg.sender)
     * @param from The address which previously owned the token
     * @param ids An array containing ids of each token being transferred (order and length must match values array)
     * @param values An array containing amounts of each token being transferred (order and length must match ids array)
     * @param data Additional data with no specified format
     * @return `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))` if transfer is allowed
     */
    function onERC1155BatchReceived(
        address operator,
        address from,
        uint256[] calldata ids,
        uint256[] calldata values,
        bytes calldata data
    ) external returns (bytes4);
}



    
////// SPDX-License-Identifier-FLATTEN-SUPPRESS-WARNING: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC1155/utils/ERC1155Receiver.sol)

pragma solidity ^0.8.0;

////import "../IERC1155Receiver.sol";
////import "../../../utils/introspection/ERC165.sol";

/**
 * @dev _Available since v3.1._
 */
abstract contract ERC1155Receiver is ERC165, IERC1155Receiver {
    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
        return interfaceId == type(IERC1155Receiver).interfaceId || super.supportsInterface(interfaceId);
    }
}



            
////// SPDX-License-Identifier-FLATTEN-SUPPRESS-WARNING: 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-FLATTEN-SUPPRESS-WARNING: 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-FLATTEN-SUPPRESS-WARNING: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);

    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * ////IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `from` to `to` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) external returns (bool);
}




            
////// SPDX-License-Identifier-FLATTEN-SUPPRESS-WARNING: 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-FLATTEN-SUPPRESS-WARNING: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC1155/utils/ERC1155Holder.sol)

pragma solidity ^0.8.0;

////import "./ERC1155Receiver.sol";

/**
 * Simple implementation of `ERC1155Receiver` that will allow a contract to hold ERC1155 tokens.
 *
 * ////IMPORTANT: When inheriting this contract, you must include a way to use the received tokens, otherwise they will be
 * stuck.
 *
 * @dev _Available since v3.1._
 */
contract ERC1155Holder is ERC1155Receiver {
    function onERC1155Received(
        address,
        address,
        uint256,
        uint256,
        bytes memory
    ) public virtual override returns (bytes4) {
        return this.onERC1155Received.selector;
    }

    function onERC1155BatchReceived(
        address,
        address,
        uint256[] memory,
        uint256[] memory,
        bytes memory
    ) public virtual override returns (bytes4) {
        return this.onERC1155BatchReceived.selector;
    }
}





            
////// SPDX-License-Identifier-FLATTEN-SUPPRESS-WARNING: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/utils/ERC721Holder.sol)

pragma solidity ^0.8.0;

////import "../IERC721Receiver.sol";

/**
 * @dev Implementation of the {IERC721Receiver} interface.
 *
 * Accepts all token transfers.
 * Make sure the contract is able to use its token with {IERC721-safeTransferFrom}, {IERC721-approve} or {IERC721-setApprovalForAll}.
 */
contract ERC721Holder is IERC721Receiver {
    /**
     * @dev See {IERC721Receiver-onERC721Received}.
     *
     * Always returns `IERC721Receiver.onERC721Received.selector`.
     */
    function onERC721Received(
        address,
        address,
        uint256,
        bytes memory
    ) public virtual override returns (bytes4) {
        return this.onERC721Received.selector;
    }
}





            
////// SPDX-License-Identifier-FLATTEN-SUPPRESS-WARNING: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC1155/IERC1155.sol)

pragma solidity ^0.8.0;

////import "../../utils/introspection/IERC165.sol";

/**
 * @dev Required interface of an ERC1155 compliant contract, as defined in the
 * https://eips.ethereum.org/EIPS/eip-1155[EIP].
 *
 * _Available since v3.1._
 */
interface IERC1155 is IERC165 {
    /**
     * @dev Emitted when `value` tokens of token type `id` are transferred from `from` to `to` by `operator`.
     */
    event TransferSingle(address indexed operator, address indexed from, address indexed to, uint256 id, uint256 value);

    /**
     * @dev Equivalent to multiple {TransferSingle} events, where `operator`, `from` and `to` are the same for all
     * transfers.
     */
    event TransferBatch(
        address indexed operator,
        address indexed from,
        address indexed to,
        uint256[] ids,
        uint256[] values
    );

    /**
     * @dev Emitted when `account` grants or revokes permission to `operator` to transfer their tokens, according to
     * `approved`.
     */
    event ApprovalForAll(address indexed account, address indexed operator, bool approved);

    /**
     * @dev Emitted when the URI for token type `id` changes to `value`, if it is a non-programmatic URI.
     *
     * If an {URI} event was emitted for `id`, the standard
     * https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[guarantees] that `value` will equal the value
     * returned by {IERC1155MetadataURI-uri}.
     */
    event URI(string value, uint256 indexed id);

    /**
     * @dev Returns the amount of tokens of token type `id` owned by `account`.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     */
    function balanceOf(address account, uint256 id) external view returns (uint256);

    /**
     * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {balanceOf}.
     *
     * Requirements:
     *
     * - `accounts` and `ids` must have the same length.
     */
    function balanceOfBatch(address[] calldata accounts, uint256[] calldata ids)
        external
        view
        returns (uint256[] memory);

    /**
     * @dev Grants or revokes permission to `operator` to transfer the caller's tokens, according to `approved`,
     *
     * Emits an {ApprovalForAll} event.
     *
     * Requirements:
     *
     * - `operator` cannot be the caller.
     */
    function setApprovalForAll(address operator, bool approved) external;

    /**
     * @dev Returns true if `operator` is approved to transfer ``account``'s tokens.
     *
     * See {setApprovalForAll}.
     */
    function isApprovedForAll(address account, address operator) external view returns (bool);

    /**
     * @dev Transfers `amount` tokens of token type `id` from `from` to `to`.
     *
     * Emits a {TransferSingle} event.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - If the caller is not `from`, it must be have been approved to spend ``from``'s tokens via {setApprovalForAll}.
     * - `from` must have a balance of tokens of type `id` of at least `amount`.
     * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
     * acceptance magic value.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 id,
        uint256 amount,
        bytes calldata data
    ) external;

    /**
     * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {safeTransferFrom}.
     *
     * Emits a {TransferBatch} event.
     *
     * Requirements:
     *
     * - `ids` and `amounts` must have the same length.
     * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
     * acceptance magic value.
     */
    function safeBatchTransferFrom(
        address from,
        address to,
        uint256[] calldata ids,
        uint256[] calldata amounts,
        bytes calldata data
    ) external;
}




            
////// SPDX-License-Identifier-FLATTEN-SUPPRESS-WARNING: 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-FLATTEN-SUPPRESS-WARNING: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

////import "../IERC20.sol";
////import "../../../utils/Address.sol";

/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
    using Address for address;

    function safeTransfer(
        IERC20 token,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    function safeTransferFrom(
        IERC20 token,
        address from,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IERC20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        require(
            (value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
    }

    function safeIncreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        uint256 newAllowance = token.allowance(address(this), spender) + value;
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    function safeDecreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        unchecked {
            uint256 oldAllowance = token.allowance(address(this), spender);
            require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
            uint256 newAllowance = oldAllowance - value;
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
        }
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
        if (returndata.length > 0) {
            // Return data is optional
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}




            
////// SPDX-License-Identifier-FLATTEN-SUPPRESS-WARNING: 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-FLATTEN-SUPPRESS-WARNING: MIT
pragma solidity ^0.8.9;

interface IFractonTokenFactory {
  function getowner() external view returns (address);

  function getDAOAddress() external view returns (address);

  function getVaultAddress() external view returns (address);

  function getSwapAddress() external view returns (address);

  function getPoolFundingVaultAddress() external view returns (address);

  function updateDao(address daoAddress) external returns (bool);

  function updateVault(address pendingVault_) external returns (bool);

  function updatePFVault(address pendingPFVault_) external returns (bool);
}





            
////// SPDX-License-Identifier-FLATTEN-SUPPRESS-WARNING: MIT
pragma solidity ^0.8.9;

interface IFractonSwap {
  event UpdatePoolRelation(
    address editor,
    address miniNFT,
    address FFT,
    address NFT
  );

  event PoolClaim(address owner, address miniNFTcontract, uint256 tokenID);

  event SwapMiniNFTtoFFT(
    address owner,
    address miniNFTcontract,
    uint256 tokenID,
    uint256 miniNFTAmount
  );

  event SwapFFTtoMiniNFT(
    address owner,
    address miniNFTcontract,
    uint256 miniNFTAmount
  );

  event SendChainlinkVRF(
    uint256 requestId,
    address sender,
    address NFTContract
  );

  event SwapMiniNFTtoNFT(address owner, address NFTContract, uint256 NFTID);

  event UpdateFactory(address factory);

  event UpdateTax(uint256 fftTax, uint256 nftTax);

  struct ChainLinkRequest {
    address sender;
    address nft;
  }

  function updatePoolRelation(
    address miniNFT,
    address FFT,
    address NFT
  ) external returns (bool);

  function poolClaim(address miniNFTcontract, uint256 tokenID)
    external
    returns (bool);

  function swapMiniNFTtoFFT(
    address miniNFTcontract,
    uint256 tokenID,
    uint256 amount
  ) external returns (bool);

  function swapFFTtoMiniNFT(address miniNFTcontract, uint256 miniNFTamount)
    external
    returns (bool);

  function swapMiniNFTtoNFT(address NFTContract) external returns (bool);

  function swapNFTtoMiniNFT(
    address NFTContract,
    address fromOwner,
    uint256 tokenId
  ) external returns (bool);

  function updateCallbackGasLimit(uint32 gasLimit_) external returns (bool);

  function updateVrfSubscriptionId(uint64 subscriptionId_)
    external
    returns (bool);

  function withdrawERC20(address project, uint256 amount) external returns (bool);
  function withdrawERC721(address airdropContract, uint256 tokenId) external returns (bool);
  function withdrawERC1155(
    address airdropContract,
    uint256 tokenId,
    uint256 amount
  ) external returns (bool);
  function updateTax(uint256 fftTax_, uint256 nftTax_) external returns (bool);
}




            
////// SPDX-License-Identifier-FLATTEN-SUPPRESS-WARNING: MIT
pragma solidity ^0.8.9;

interface IFractonMiniNFT {
  event StartNewRound(uint256 blockNumber, uint256 sellingPrice);

  event CloseRound(uint256 blockNumber);

  event ClaimBlindBox(address owner, uint256 tokenID, uint256 amount);

  event WithdrawEther(address caller, uint256 amount);

  event UpdateRoundSucceed(uint256 round, uint256 blockNumber);

  event UpdateBlindBoxPrice(uint256 price);

  function startNewRound(uint256 sellingPrice) external returns (bool);

  function closeRound() external returns (bool);

  function mintBlindBox(uint256 amount) external payable returns (uint256);

  function claimBlindBox(uint256 tokenID) external returns (uint256);

  function withdrawEther() external returns (bool);

  function updateRoundSucceed(uint256 round) external returns (bool);

  function updateBlindBoxPrice(uint256 BBoxPrice) external returns (bool);

  function totalSupply(uint256 id) external view returns (uint256);

  function burn(uint256 amount) external;

  function swapmint(uint256 amount, address to) external returns (bool);
}




        
////// SPDX-License-Identifier-FLATTEN-SUPPRESS-WARNING: MIT
pragma solidity ^0.8.9;

////import '@openzeppelin/contracts/token/ERC20/IERC20.sol';

interface IFractonFFT is IERC20 {
  event SetPercent(uint256 vaultPercent, uint256 pfVaultPercent);

  function swapmint(uint256 amount, address to) external returns (bool);

  function transfer(address to, uint256 value) external returns (bool);

  function multiTransfer(address[] memory receivers, uint256[] memory amounts)
    external;

  function transferFrom(
    address from,
    address to,
    uint256 value
  ) external returns (bool);

  function burnFrom(address from, uint256 value) external returns (bool);

  function isExcludedFromFee(address account) external view returns (bool);

  function updateFee(uint256 vaultPercent_, uint256 pfVaultPercent_)
    external
    returns (bool);

  function excludeFromFee(address account) external returns (bool);
  function batchExcludeFromFee(address[] memory accounts) external returns (bool);
  function includeInFee(address account) external returns (bool);
}



////// SPDX-License-Identifier-FLATTEN-SUPPRESS-WARNING: MIT
pragma solidity ^0.8.9;

////import {IFractonFFT} from "../interface/IFractonFFT.sol";
////import {IFractonMiniNFT} from "../interface/IFractonMiniNFT.sol";
////import {IFractonSwap} from "../interface/IFractonSwap.sol";
////import {IFractonTokenFactory} from "../interface/IFractonTokenFactory.sol";
////import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
////import {IERC20, SafeERC20 } from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
////import {IERC721} from "@openzeppelin/contracts/token/ERC721/IERC721.sol";
////import {IERC1155} from "@openzeppelin/contracts/token/ERC1155/IERC1155.sol";
////import {ERC721Holder} from "@openzeppelin/contracts/token/ERC721/utils/ERC721Holder.sol";
////import {ERC1155Holder} from "@openzeppelin/contracts/token/ERC1155/utils/ERC1155Holder.sol";

/// @title FractonDAO
/// @dev It Implements fracton system onlyDAO functions
contract FractonDAO is Ownable, ERC721Holder, ERC1155Holder {
    using SafeERC20 for IERC20;

    /// @notice Whitelist NFT collections and users for permissionless fraction
    mapping(address => mapping(address => bool)) public whiteListedUsers;

    /// @notice Fracton Token Factory address
    IFractonTokenFactory public immutable fractonTokenFactory;

    /// @notice FractonSwap address
    IFractonSwap public immutable fractonSwap;

    event WithdrawEtherFromMiniNFT(address miniNFT, uint256 amount, address receiver);

    event WithdrawERC20FromSwap(address token, uint256 amount, address receiver);

    event WithdrawERC721FromSwap(address token, uint256 tokenId, address receiver);

    event WithdrawERC1155FromSwap(address token, uint256 tokenId, uint256 amount, address receiver);

    event WhiteListedUserSet(address collection, address user, bool enabled);

    modifier onlyWhiteListed(address _user, address _collection) {
        require(
            whiteListedUsers[_collection][_user],
            "Fracton: user not authorized"
        );
        _;
    }

    constructor(address _fractonTokenFactory, address _fractonSwap) {
        require(_fractonTokenFactory != address(0), "Fracton: Invalid address");
        require(_fractonSwap != address(0), "Fracton: Invalid address");

        fractonTokenFactory = IFractonTokenFactory(_fractonTokenFactory);
        fractonSwap = IFractonSwap(_fractonSwap);
    }

    /// @notice Update a user whitelisted status
    /// @param _user the user address
    /// @param _enable true if whitelist the user for permissionless fraction, vice versa
    function updateWhitelistedUser(address _collection,address _user,  bool _enable) external onlyOwner {
        whiteListedUsers[_collection][_user] = _enable;
        emit WhiteListedUserSet(_collection, _user, _enable);
    }

    /************************************************
     *         Fracton FFT onlyDAO functions
     ************************************************/
    function excludeFromFee(address _account, address _fft) external onlyOwner {
        require(
            IFractonFFT(_fft).excludeFromFee(_account),
            "Fracton: exclude from fee failed"
        );
    }

    function batchExcludeFromFee(
        address[] memory _accounts,
        address _fft
    ) external onlyOwner {
        require(
            IFractonFFT(_fft).batchExcludeFromFee(_accounts),
            "Fracton: batch exclude from fee failed"
        );
    }

    function updateFee(
        uint256 _vaultPercent,
        uint256 _pfVaultPercent,
        address _fft
    ) external onlyOwner {
        require(
            IFractonFFT(_fft).updateFee(_vaultPercent, _pfVaultPercent),
            "Fracton: update fee failed"
        );
    }

    function includeInFee(address _account, address _fft) external onlyOwner {
        require(
            IFractonFFT(_fft).includeInFee(_account),
            "Fracton: include in fee failed"
        );
    }

    /************************************************
     *         Fracton miniNFT onlyDAO functions
     ************************************************/
    function startNewRound(uint256 _sellingPrice, address _miniNFT) external onlyOwner {
        require(
            IFractonMiniNFT(_miniNFT).startNewRound(_sellingPrice),
            "Fracton: start new round failed"
        );
    }

    function closeRound(address _miniNFT) external onlyOwner {
        require(
            IFractonMiniNFT(_miniNFT).closeRound(),
            "Fracton: close round failed"
        );
    }

    /// @notice Withdraw fundrasing ethers for purchasing NFT
    function withdrawEther(address _miniNFT, address _receiver) external onlyOwner {
        require(
            IFractonMiniNFT(_miniNFT).withdrawEther(),
            "Fracton: withdraw ether failed"
        );
        uint256 amount = address(this).balance;
        payable(_receiver).transfer(amount);

        emit WithdrawEtherFromMiniNFT(_miniNFT, amount, _receiver);
    }

    function updateRoundSucceed(uint256 _round, address _miniNFT) external onlyOwner {
        require(
            IFractonMiniNFT(_miniNFT).updateRoundSucceed(_round),
            "Fracton: update round falied"
        );
    }

    function updateBlindBoxPrice(uint256 _newPrice, address _miniNFT) external onlyOwner {
        require(
            IFractonMiniNFT(_miniNFT).updateBlindBoxPrice(_newPrice),
            "Fracton: update new price falied"
        );
    }

    /************************************************
     *         Fracton swap onlyDAO functions
     ************************************************/
    function swapNFTtoMiniNFT(
        address _collection,
        uint256 _tokenId
    ) external onlyWhiteListed(_msgSender(), _collection) {
        require(
            IFractonSwap(fractonSwap).swapNFTtoMiniNFT(
                _collection,
                _msgSender(),
                _tokenId
            ),
            "Fracton: swap NFT to MiniNFT failed"
        );
    }

    function withdrawERC20(
        address _project,
        uint256 _amount,
        address _receiver
    ) external onlyOwner {
        require(
            IFractonSwap(fractonSwap).withdrawERC20(_project, _amount),
            "Fracton: withdraw ERC20 failed"
        );
        IERC20(_project).safeTransfer(
            _receiver,
            _amount
        );

        emit WithdrawERC20FromSwap(_project, _amount, _receiver);
    }

    function withdrawERC721(
        address _airdropContract,
        uint256 _tokenId,
        address _receiver
    ) external onlyOwner {
        require(
            IFractonSwap(fractonSwap).withdrawERC721(
                _airdropContract,
                _tokenId
            ),
            "Fracton: withdraw ERC721 failed" 
        );
        IERC721(_airdropContract).safeTransferFrom(
            address(this),
            _receiver,
            _tokenId
        );

        emit WithdrawERC721FromSwap(_airdropContract, _tokenId, _receiver);
    }

    function withdrawERC1155(
        address _airdropContract,
        uint256 _tokenId,
        uint256 _amount,
        address _receiver
    ) external onlyOwner {
        require(
            IFractonSwap(fractonSwap).withdrawERC1155(
                _airdropContract,
                _tokenId,
                _amount
            ),
            "Fracton: withdraw ERC1155 failed"
        );
        IERC1155(_airdropContract).safeTransferFrom(
            address(this),
            _receiver,
            _tokenId,
            _amount,
            ""
        );

        emit WithdrawERC1155FromSwap(_airdropContract, _tokenId, _amount, _receiver);
    }

    function updateTax(uint256 _fftTax, uint256 _nftTax) external onlyOwner {
        require(
            IFractonSwap(fractonSwap).updateTax(_fftTax, _nftTax),
            "Fracton: update tax failed"
        );
    }

    function updateCallbackGasLimit(uint32 _gasLimit) external onlyOwner {
        require(
            IFractonSwap(fractonSwap).updateCallbackGasLimit(_gasLimit),
            "Fracton: update callback gas limit failed"
        );
    }

    function updateVrfSubscriptionId(uint64 _subscriptionId) external onlyOwner {
        require(
            IFractonSwap(fractonSwap).updateVrfSubscriptionId(_subscriptionId),
            "Fracton: update vrf subscriptionId failed"
        );
    }

    /************************************************
     *     Fracton token factory onlyDAO functions
     ************************************************/
    function updateDao(address _daoAddress) external onlyOwner {
        require(
            IFractonTokenFactory(fractonTokenFactory).updateDao(_daoAddress),
            "Fracton: update dao failed"
        );
    }

    function updateVault(address _pendingVault) external onlyOwner {
        require(
            IFractonTokenFactory(fractonTokenFactory).updateVault(_pendingVault),
            "Fracton: update vault failed"
        );
    }

    function updatePFVault(address _pendingPFVault) external onlyOwner {
        require(
            IFractonTokenFactory(fractonTokenFactory).updatePFVault(_pendingPFVault),
             "Fracton: update PFvault failed"
        );
    }

    /// @dev See {IERC721Receiver-onERC721Received}.
    function onERC721Received(
        address,
        address,
        uint256,
        bytes memory
    ) public virtual override returns (bytes4) {
        return this.onERC721Received.selector;
    }

    /// @dev See {IERC1155Receiver-onERC1155Received}.
    function onERC1155Received(
        address,
        address,
        uint256,
        uint256,
        bytes memory
    ) public virtual override returns (bytes4) {
        return this.onERC1155Received.selector;
    }

    receive() external payable {}
}