ETH Price: $3,482.25 (+0.53%)

Token

&extensions (EXT)
 

Overview

Max Total Supply

8,804 EXT

Holders

2,769

Market

Volume (24H)

N/A

Min Price (24H)

N/A

Max Price (24H)

N/A
0x8a1137f86d2e33bf6a1fb97159b0327bf1be19ff
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Similar Match Source Code
This contract matches the deployed Bytecode of the Source Code for Contract 0x5e88650C...a6C6A9bF7
The constructor portion of the code might be different and could alter the actual behaviour of the contract

Contract Name:
Diamond

Compiler Version
v0.8.15+commit.e14f2714

Optimization Enabled:
Yes with 1337 runs

Other Settings:
default evmVersion, MIT license
File 1 of 17 : Diamond.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.15;

import "../access/ownable/OwnableStorage.sol";
import "../access/ownable/IERC173.sol";
import "../introspection/ERC165.sol";
import "../metatx/ERC2771Context.sol";
import "../diamond/IDiamondCut.sol";
import "../diamond/IDiamondLoupe.sol";

import "@openzeppelin/contracts/utils/Multicall.sol";

import "./DiamondStorage.sol";

contract Diamond is Multicall {
    using ERC165Storage for ERC165Storage.Layout;
    using OwnableStorage for OwnableStorage.Layout;

    struct Initialization {
        address initContract;
        bytes initData;
    }

    struct CoreFacets {
        address diamondCutFacet;
        address diamondLoupeFacet;
        address erc165Facet;
        address erc173Facet;
    }

    constructor(
        address owner,
        CoreFacets memory _coreFacets,
        IDiamondCut.FacetCut[] memory _facets,
        Initialization[] memory _initializations
    ) {
        ERC165Storage.Layout storage erc165 = ERC165Storage.layout();

        // register DiamondCut

        bytes4[] memory selectorsDiamondCut = new bytes4[](1);
        selectorsDiamondCut[0] = IDiamondCut.diamondCut.selector;

        erc165.setSupportedInterface(type(IDiamondCut).interfaceId, true);

        // register DiamondLoupe

        bytes4[] memory selectorsDiamondLoupe = new bytes4[](4);
        selectorsDiamondLoupe[0] = IDiamondLoupe.facets.selector;
        selectorsDiamondLoupe[1] = IDiamondLoupe.facetFunctionSelectors.selector;
        selectorsDiamondLoupe[2] = IDiamondLoupe.facetAddresses.selector;
        selectorsDiamondLoupe[3] = IDiamondLoupe.facetAddress.selector;

        erc165.setSupportedInterface(type(IDiamondLoupe).interfaceId, true);

        // register ERC165 (supportsInterface)

        bytes4[] memory selectorsERC165 = new bytes4[](1);
        selectorsERC165[0] = IERC165.supportsInterface.selector;

        erc165.setSupportedInterface(type(IERC165).interfaceId, true);

        // register ERC173 (Ownable)

        bytes4[] memory selectorsERC173 = new bytes4[](2);
        selectorsERC173[0] = IERC173.owner.selector;
        selectorsERC173[1] = IERC173.transferOwnership.selector;

        erc165.setSupportedInterface(type(IERC173).interfaceId, true);

        // execute the first ever diamond cut,
        // we are calling the addFunctions directly to save ~ %50 gas

        DiamondStorage.addFunctions(_coreFacets.diamondCutFacet, selectorsDiamondCut);
        DiamondStorage.addFunctions(_coreFacets.diamondLoupeFacet, selectorsDiamondLoupe);
        DiamondStorage.addFunctions(_coreFacets.erc165Facet, selectorsERC165);
        DiamondStorage.addFunctions(_coreFacets.erc173Facet, selectorsERC173);

        // set owner

        OwnableStorage.layout().setOwner(owner);

        // initialization

        for (uint256 i = 0; i < _facets.length; i++) {
            DiamondStorage.addFunctions(_facets[i].facetAddress, _facets[i].functionSelectors);
        }

        for (uint256 i = 0; i < _initializations.length; i++) {
            DiamondStorage.initializeDiamondCut(_initializations[i].initContract, _initializations[i].initData);
        }
    }

    // Find facet for function that is called and execute the
    // function if a facet is found and return any value.
    fallback() external payable {
        DiamondStorage.Layout storage l;
        bytes32 position = DiamondStorage.DIAMOND_STORAGE_POSITION;
        // get diamond storage
        assembly {
            l.slot := position
        }

        // get facet from function selector
        address facet = l.selectorToFacetAndPosition[msg.sig].facetAddress;
        require(facet != address(0), "BAD_FUNC");

        // Execute external function from facet using delegatecall and return any value.
        assembly {
            // copy function selector and any arguments
            calldatacopy(0, 0, calldatasize())
            // execute function call using the facet
            let result := delegatecall(gas(), facet, 0, calldatasize(), 0, 0)
            // get any return value
            returndatacopy(0, 0, returndatasize())
            // return any return value or error back to the caller
            switch result
            case 0 {
                revert(0, returndatasize())
            }
            default {
                return(0, returndatasize())
            }
        }
    }

    receive() external payable {}
}

File 2 of 17 : Address.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (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
                /// @solidity memory-safe-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

File 3 of 17 : Context.sol
// 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;
    }
}

File 4 of 17 : Multicall.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/Multicall.sol)

pragma solidity ^0.8.0;

import "./Address.sol";

/**
 * @dev Provides a function to batch together multiple calls in a single external call.
 *
 * _Available since v4.1._
 */
abstract contract Multicall {
    /**
     * @dev Receives and executes a batch of function calls on this contract.
     */
    function multicall(bytes[] calldata data) external virtual returns (bytes[] memory results) {
        results = new bytes[](data.length);
        for (uint256 i = 0; i < data.length; i++) {
            results[i] = Address.functionDelegateCall(address(this), data[i]);
        }
        return results;
    }
}

File 5 of 17 : IERC165.sol
// 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);
}

File 6 of 17 : IERC173.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.15;

import "./IERC173Events.sol";

/**
 * @title Contract ownership standard interface
 * @dev see https://eips.ethereum.org/EIPS/eip-173
 */
interface IERC173 is IERC173Events {
    /**
     * @notice get the ERC173 contract owner
     * @return conrtact owner
     */
    function owner() external view returns (address);

    /**
     * @notice transfer contract ownership to new account
     * @param account address of new owner
     */
    function transferOwnership(address account) external;
}

File 7 of 17 : IERC173Events.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.15;

/**
 * @title Contract ownership standard interface (event only)
 * @dev see https://eips.ethereum.org/EIPS/eip-173
 */
interface IERC173Events {
    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
}

File 8 of 17 : OwnableStorage.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.15;

library OwnableStorage {
    struct Layout {
        address owner;
    }

    bytes32 internal constant STORAGE_SLOT = keccak256("openzeppelin.contracts.storage.Ownable");

    function layout() internal pure returns (Layout storage l) {
        bytes32 slot = STORAGE_SLOT;
        assembly {
            l.slot := slot
        }
    }

    function setOwner(Layout storage l, address owner) internal {
        l.owner = owner;
    }
}

File 9 of 17 : DiamondStorage.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.15;

/******************************************************************************\
* Author: Nick Mudge <[email protected]> (https://twitter.com/mudgen)
* EIP-2535 Diamonds: https://eips.ethereum.org/EIPS/eip-2535
/******************************************************************************/

import "../diamond/IDiamondCut.sol";

// Remember to add the loupe functions from DiamondLoupeFacet to the diamond.
// The loupe functions are required by the EIP2535 Diamonds standard

error ErrDiamondFacetAlreadyExists(address facet, bytes4 selector);
error ErrDiamondFacetSameFunction(address facet, bytes4 selector);

library DiamondStorage {
    bytes32 constant DIAMOND_STORAGE_POSITION = keccak256("diamond.standard.diamond.storage");

    struct FacetAddressAndPosition {
        address facetAddress;
        uint96 functionSelectorPosition; // position in facetFunctionSelectors.functionSelectors array
    }

    struct FacetFunctionSelectors {
        bytes4[] functionSelectors;
        uint256 facetAddressPosition; // position of facetAddress in facetAddresses array
    }

    struct Layout {
        // maps function selector to the facet address and
        // the position of the selector in the facetFunctionSelectors.selectors array
        mapping(bytes4 => FacetAddressAndPosition) selectorToFacetAndPosition;
        // maps facet addresses to function selectors
        mapping(address => FacetFunctionSelectors) facetFunctionSelectors;
        // facet addresses
        address[] facetAddresses;
    }

    function layout() internal pure returns (Layout storage l) {
        bytes32 position = DIAMOND_STORAGE_POSITION;
        assembly {
            l.slot := position
        }
    }

    event DiamondCut(IDiamondCut.FacetCut[] _diamondCut, address _init, bytes _calldata);

    // Internal function version of diamondCut
    function diamondCut(
        IDiamondCut.FacetCut[] memory _diamondCut,
        address _init,
        bytes memory _calldata
    ) internal {
        for (uint256 facetIndex; facetIndex < _diamondCut.length; facetIndex++) {
            IDiamondCut.FacetCutAction action = _diamondCut[facetIndex].action;
            if (action == IDiamondCut.FacetCutAction.Add) {
                addFunctions(_diamondCut[facetIndex].facetAddress, _diamondCut[facetIndex].functionSelectors);
            } else if (action == IDiamondCut.FacetCutAction.Replace) {
                replaceFunctions(_diamondCut[facetIndex].facetAddress, _diamondCut[facetIndex].functionSelectors);
            } else if (action == IDiamondCut.FacetCutAction.Remove) {
                removeFunctions(_diamondCut[facetIndex].facetAddress, _diamondCut[facetIndex].functionSelectors);
            } else {
                revert("LibDiamondCut: Incorrect FacetCutAction");
            }
        }
        emit DiamondCut(_diamondCut, _init, _calldata);
        initializeDiamondCut(_init, _calldata);
    }

    function addFunctions(address _facetAddress, bytes4[] memory _functionSelectors) internal {
        // require(
        //     _functionSelectors.length > 0,
        //     "LibDiamondCut: No selectors in facet to cut"
        // );
        Layout storage l = layout();
        // require(
        //     _facetAddress != address(0),
        //     "LibDiamondCut: Add facet can't be address(0)"
        // );
        uint96 selectorPosition = uint96(l.facetFunctionSelectors[_facetAddress].functionSelectors.length);
        // add new facet address if it does not exist
        if (selectorPosition == 0) {
            addFacet(l, _facetAddress);
        }
        for (uint256 selectorIndex; selectorIndex < _functionSelectors.length; selectorIndex++) {
            bytes4 selector = _functionSelectors[selectorIndex];
            address oldFacetAddress = l.selectorToFacetAndPosition[selector].facetAddress;

            if (oldFacetAddress != address(0)) {
                revert ErrDiamondFacetAlreadyExists(oldFacetAddress, selector);
            }

            addFunction(l, selector, selectorPosition, _facetAddress);
            selectorPosition++;
        }
    }

    function replaceFunctions(address _facetAddress, bytes4[] memory _functionSelectors) internal {
        // require(
        //     _functionSelectors.length > 0,
        //     "LibDiamondCut: No selectors in facet to cut"
        // );
        Layout storage l = layout();
        // require(
        //     _facetAddress != address(0),
        //     "LibDiamondCut: Add facet can't be address(0)"
        // );
        uint96 selectorPosition = uint96(l.facetFunctionSelectors[_facetAddress].functionSelectors.length);
        // add new facet address if it does not exist
        if (selectorPosition == 0) {
            addFacet(l, _facetAddress);
        }
        for (uint256 selectorIndex; selectorIndex < _functionSelectors.length; selectorIndex++) {
            bytes4 selector = _functionSelectors[selectorIndex];
            address oldFacetAddress = l.selectorToFacetAndPosition[selector].facetAddress;

            if (oldFacetAddress == _facetAddress) {
                revert ErrDiamondFacetSameFunction(oldFacetAddress, selector);
            }

            removeFunction(l, oldFacetAddress, selector);
            addFunction(l, selector, selectorPosition, _facetAddress);
            selectorPosition++;
        }
    }

    function removeFunctions(address, bytes4[] memory _functionSelectors) internal {
        // require(
        //     _functionSelectors.length > 0,
        //     "LibDiamondCut: No selectors in facet to cut"
        // );
        Layout storage l = layout();
        // if function does not exist then do nothing and return
        // require(
        //     _facetAddress == address(0),
        //     "LibDiamondCut: Remove facet address must be address(0)"
        // );
        for (uint256 selectorIndex; selectorIndex < _functionSelectors.length; selectorIndex++) {
            bytes4 selector = _functionSelectors[selectorIndex];
            address oldFacetAddress = l.selectorToFacetAndPosition[selector].facetAddress;
            removeFunction(l, oldFacetAddress, selector);
        }
    }

    function addFacet(Layout storage l, address _facetAddress) internal {
        enforceHasContractCode(_facetAddress, "LibDiamondCut: New facet has no code");
        l.facetFunctionSelectors[_facetAddress].facetAddressPosition = l.facetAddresses.length;
        l.facetAddresses.push(_facetAddress);
    }

    function addFunction(
        Layout storage l,
        bytes4 _selector,
        uint96 _selectorPosition,
        address _facetAddress
    ) internal {
        l.selectorToFacetAndPosition[_selector].functionSelectorPosition = _selectorPosition;
        l.facetFunctionSelectors[_facetAddress].functionSelectors.push(_selector);
        l.selectorToFacetAndPosition[_selector].facetAddress = _facetAddress;
    }

    function removeFunction(
        Layout storage l,
        address _facetAddress,
        bytes4 _selector
    ) internal {
        // require(
        //     _facetAddress != address(0),
        //     "LibDiamondCut: Can't remove function that doesn't exist"
        // );
        // an immutable function is a function defined directly in a diamond
        // require(
        //     _facetAddress != address(this),
        //     "LibDiamondCut: Can't remove immutable function"
        // );
        // replace selector with last selector, then delete last selector
        uint256 selectorPosition = l.selectorToFacetAndPosition[_selector].functionSelectorPosition;
        uint256 lastSelectorPosition = l.facetFunctionSelectors[_facetAddress].functionSelectors.length - 1;
        // if not the same then replace _selector with lastSelector
        if (selectorPosition != lastSelectorPosition) {
            bytes4 lastSelector = l.facetFunctionSelectors[_facetAddress].functionSelectors[lastSelectorPosition];
            l.facetFunctionSelectors[_facetAddress].functionSelectors[selectorPosition] = lastSelector;
            l.selectorToFacetAndPosition[lastSelector].functionSelectorPosition = uint96(selectorPosition);
        }
        // delete the last selector
        l.facetFunctionSelectors[_facetAddress].functionSelectors.pop();
        delete l.selectorToFacetAndPosition[_selector];

        // if no more selectors for facet address then delete the facet address
        if (lastSelectorPosition == 0) {
            // replace facet address with last facet address and delete last facet address
            uint256 lastFacetAddressPosition = l.facetAddresses.length - 1;
            uint256 facetAddressPosition = l.facetFunctionSelectors[_facetAddress].facetAddressPosition;
            if (facetAddressPosition != lastFacetAddressPosition) {
                address lastFacetAddress = l.facetAddresses[lastFacetAddressPosition];
                l.facetAddresses[facetAddressPosition] = lastFacetAddress;
                l.facetFunctionSelectors[lastFacetAddress].facetAddressPosition = facetAddressPosition;
            }
            l.facetAddresses.pop();
            delete l.facetFunctionSelectors[_facetAddress].facetAddressPosition;
        }
    }

    function initializeDiamondCut(address _init, bytes memory _calldata) internal {
        if (_init == address(0)) {
            require(_calldata.length == 0, "LibDiamondCut: _init is address(0) but_calldata is not empty");
        } else {
            require(_calldata.length > 0, "LibDiamondCut: _calldata is empty but _init is not address(0)");
            if (_init != address(this)) {
                enforceHasContractCode(_init, "LibDiamondCut: _init address has no code");
            }
            (bool success, bytes memory error) = _init.delegatecall(_calldata);
            if (!success) {
                if (error.length > 0) {
                    // bubble up the error
                    revert(string(error));
                } else {
                    revert("LibDiamondCut: _init function reverted");
                }
            }
        }
    }

    function enforceHasContractCode(address _contract, string memory _errorMessage) internal view {
        uint256 contractSize;
        assembly {
            contractSize := extcodesize(_contract)
        }
        require(contractSize > 0, _errorMessage);
    }
}

File 10 of 17 : IDiamondCut.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.15;

/******************************************************************************\
* Author: Nick Mudge <[email protected]> (https://twitter.com/mudgen)
* EIP-2535 Diamonds: https://eips.ethereum.org/EIPS/eip-2535
/******************************************************************************/

interface IDiamondCut {
    enum FacetCutAction {
        Add,
        Replace,
        Remove
    }
    // Add=0, Replace=1, Remove=2

    struct FacetCut {
        address facetAddress;
        FacetCutAction action;
        bytes4[] functionSelectors;
    }

    /// @notice Add/replace/remove any number of functions and optionally execute
    ///         a function with delegatecall
    /// @param _diamondCut Contains the facet addresses and function selectors
    /// @param _init The address of the contract or facet to execute _calldata
    /// @param _calldata A function call, including function selector and arguments
    ///                  _calldata is executed with delegatecall on _init
    function diamondCut(
        FacetCut[] calldata _diamondCut,
        address _init,
        bytes calldata _calldata
    ) external;

    event DiamondCut(FacetCut[] _diamondCut, address _init, bytes _calldata);
}

File 11 of 17 : IDiamondLoupe.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.15;

/******************************************************************************\
* Author: Nick Mudge <[email protected]> (https://twitter.com/mudgen)
* EIP-2535 Diamonds: https://eips.ethereum.org/EIPS/eip-2535
/******************************************************************************/

// A loupe is a small magnifying glass used to look at diamonds.
// These functions look at diamonds
interface IDiamondLoupe {
    /// These functions are expected to be called frequently
    /// by tools.

    struct Facet {
        address facetAddress;
        bytes4[] functionSelectors;
    }

    /// @notice Gets all facet addresses and their four byte function selectors.
    /// @return facets_ Facet
    function facets() external view returns (Facet[] memory facets_);

    /// @notice Gets all the function selectors supported by a specific facet.
    /// @param _facet The facet address.
    /// @return facetFunctionSelectors_
    function facetFunctionSelectors(address _facet) external view returns (bytes4[] memory facetFunctionSelectors_);

    /// @notice Get all the facet addresses used by a diamond.
    /// @return facetAddresses_
    function facetAddresses() external view returns (address[] memory facetAddresses_);

    /// @notice Gets the facet that supports the given selector.
    /// @dev If facet is not found return address(0).
    /// @param _functionSelector The function selector.
    /// @return facetAddress_ The facet address.
    function facetAddress(bytes4 _functionSelector) external view returns (address facetAddress_);
}

File 12 of 17 : ERC165.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.15;

import "@openzeppelin/contracts/utils/introspection/IERC165.sol";

import "./ERC165Storage.sol";

/**
 * @title ERC165
 * @notice Standard EIP-165 facet which would be already included as a core facet in Flair's Diamond contract.
 *
 * @custom:type eip-2535-facet
 * @custom:category Introspection
 * @custom:provides-interfaces IERC165
 */
contract ERC165 is IERC165 {
    using ERC165Storage for ERC165Storage.Layout;

    /**
     * @inheritdoc IERC165
     */
    function supportsInterface(bytes4 interfaceId) public view returns (bool) {
        return ERC165Storage.layout().isSupportedInterface(interfaceId);
    }
}

File 13 of 17 : ERC165Storage.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.15;

library ERC165Storage {
    struct Layout {
        mapping(bytes4 => bool) supportedInterfaces;
    }

    bytes32 internal constant STORAGE_SLOT = keccak256("openzeppelin.contracts.storage.ERC165");

    function layout() internal pure returns (Layout storage l) {
        bytes32 slot = STORAGE_SLOT;
        assembly {
            l.slot := slot
        }
    }

    function isSupportedInterface(Layout storage l, bytes4 interfaceId) internal view returns (bool) {
        return l.supportedInterfaces[interfaceId];
    }

    function setSupportedInterface(
        Layout storage l,
        bytes4 interfaceId,
        bool status
    ) internal {
        require(interfaceId != 0xffffffff, "ERC165: invalid interface id");
        l.supportedInterfaces[interfaceId] = status;
    }
}

File 14 of 17 : ERC2771Context.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.15;

import "./ERC2771ContextStorage.sol";
import "./ERC2771ContextInternal.sol";
import "./IERC2771Context.sol";

/**
 * @title ERC2771 Context
 * @notice Provides view functions about configured trusted forwarder according to EIP-2771.
 *
 * @custom:type eip-2535-facet
 * @custom:category Meta Transactions
 * @custom:provides-interfaces IERC2771Context
 */
contract ERC2771Context is IERC2771Context, ERC2771ContextInternal {
    using ERC2771ContextStorage for ERC2771ContextStorage.Layout;

    function trustedForwarder() external view override returns (address) {
        return ERC2771ContextStorage.layout().trustedForwarder;
    }

    function isTrustedForwarder(address forwarder) public view virtual returns (bool) {
        return _isTrustedForwarder(forwarder);
    }
}

File 15 of 17 : ERC2771ContextInternal.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.15;

import "@openzeppelin/contracts/utils/Context.sol";

import "./ERC2771ContextStorage.sol";

abstract contract ERC2771ContextInternal is Context {
    function _isTrustedForwarder(address operator) internal view returns (bool) {
        return ERC2771ContextStorage.layout().trustedForwarder == operator;
    }

    function _msgSender() internal view virtual override returns (address sender) {
        if (_isTrustedForwarder(msg.sender)) {
            // The assembly code is more direct than the Solidity version using `abi.decode`.
            /// @solidity memory-safe-assembly
            assembly {
                sender := shr(96, calldataload(sub(calldatasize(), 20)))
            }
        } else {
            return super._msgSender();
        }
    }

    function _msgData() internal view virtual override returns (bytes calldata) {
        if (_isTrustedForwarder(msg.sender)) {
            return msg.data[:msg.data.length - 20];
        } else {
            return super._msgData();
        }
    }
}

File 16 of 17 : ERC2771ContextStorage.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.15;

library ERC2771ContextStorage {
    struct Layout {
        address trustedForwarder;
    }

    bytes32 internal constant STORAGE_SLOT = keccak256("openzeppelin.contracts.storage.ERC2771Context");

    function layout() internal pure returns (Layout storage l) {
        bytes32 slot = STORAGE_SLOT;
        assembly {
            l.slot := slot
        }
    }
}

File 17 of 17 : IERC2771Context.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.15;

interface IERC2771Context {
    function trustedForwarder() external view returns (address);

    function isTrustedForwarder(address forwarder) external view returns (bool);
}

Settings
{
  "evmVersion": "london",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs",
    "useLiteralContent": true
  },
  "optimizer": {
    "enabled": true,
    "runs": 1337
  },
  "remappings": [],
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

Contract Security Audit

Contract ABI

[{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"components":[{"internalType":"address","name":"diamondCutFacet","type":"address"},{"internalType":"address","name":"diamondLoupeFacet","type":"address"},{"internalType":"address","name":"erc165Facet","type":"address"},{"internalType":"address","name":"erc173Facet","type":"address"}],"internalType":"struct Diamond.CoreFacets","name":"_coreFacets","type":"tuple"},{"components":[{"internalType":"address","name":"facetAddress","type":"address"},{"internalType":"enum IDiamondCut.FacetCutAction","name":"action","type":"uint8"},{"internalType":"bytes4[]","name":"functionSelectors","type":"bytes4[]"}],"internalType":"struct IDiamondCut.FacetCut[]","name":"_facets","type":"tuple[]"},{"components":[{"internalType":"address","name":"initContract","type":"address"},{"internalType":"bytes","name":"initData","type":"bytes"}],"internalType":"struct Diamond.Initialization[]","name":"_initializations","type":"tuple[]"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[{"internalType":"address","name":"facet","type":"address"},{"internalType":"bytes4","name":"selector","type":"bytes4"}],"name":"ErrDiamondFacetAlreadyExists","type":"error"},{"stateMutability":"payable","type":"fallback"},{"inputs":[{"internalType":"bytes[]","name":"data","type":"bytes[]"}],"name":"multicall","outputs":[{"internalType":"bytes[]","name":"results","type":"bytes[]"}],"stateMutability":"nonpayable","type":"function"},{"stateMutability":"payable","type":"receive"}]

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