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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

import {LibDiamond} from "./LibDiamond.sol";
import {IDiamondCut} from "../interfaces/IDiamondCut.sol";

contract Diamond {
    constructor(address _contractOwner, address _diamondCutFacet) payable {
        LibDiamond.setContractOwner(_contractOwner);

        IDiamondCut.FacetCut[] memory cut = new IDiamondCut.FacetCut[](1);
        bytes4[] memory functionSelectors = new bytes4[](1);
        functionSelectors[0] = IDiamondCut.diamondCut.selector;
        cut[0] = IDiamondCut.FacetCut({
            facetAddress: _diamondCutFacet, action: IDiamondCut.FacetCutAction.Add, functionSelectors: functionSelectors
        });
        LibDiamond.diamondCut(cut, address(0), "");
    }

    fallback() external payable {
        LibDiamond.DiamondStorage storage ds;
        bytes32 position = LibDiamond.DIAMOND_STORAGE_POSITION;
        assembly {
            ds.slot := position
        }
        address facet = ds.selectorToFacetAndPosition[msg.sig].facetAddress;
        require(facet != address(0), "Diamond: Function does not exist");
        assembly {
            calldatacopy(0, 0, calldatasize())
            let result := delegatecall(gas(), facet, 0, calldatasize(), 0, 0)
            returndatacopy(0, 0, returndatasize())
            switch result
            case 0 { revert(0, returndatasize()) }
            default { return(0, returndatasize()) }
        }
    }

    receive() external payable {
        revert("Diamond: ETH not accepted");
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

import {IDiamondCut} from "../interfaces/IDiamondCut.sol";

library LibDiamond {
    bytes32 constant DIAMOND_STORAGE_POSITION = keccak256("cartha.diamond.storage");

    struct FacetAddressAndPosition {
        address facetAddress;
        uint96 functionSelectorPosition;
    }

    struct FacetFunctionSelectors {
        bytes4[] functionSelectors;
        uint256 facetAddressPosition;
    }

    struct DiamondStorage {
        mapping(bytes4 => FacetAddressAndPosition) selectorToFacetAndPosition;
        mapping(address => FacetFunctionSelectors) facetFunctionSelectors;
        address[] facetAddresses;
        mapping(bytes4 => bool) supportedInterfaces;
        address contractOwner;
        mapping(uint8 => mapping(address => bool)) roles;
    }

    error InitializationFailed(address _initializationContractAddress, bytes _calldata);
    error NotContractOwner(address _user, address _contractOwner);
    error NoSelectorsInFacet(address _facetAddress);
    error FacetHasNoCode(address _facetAddress);
    error FunctionAlreadyExists(bytes4 _selector);
    error FunctionDoesNotExist(bytes4 _selector);
    error FunctionIsImmutable(bytes4 _selector);
    error ReplaceFunctionWithSameAddress(bytes4 _selector);
    error RemoveFacetAddressMustBeZero(address _facetAddress);
    error AddFacetCannotBeZero();

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

    function diamondStorage() internal pure returns (DiamondStorage storage ds) {
        bytes32 position = DIAMOND_STORAGE_POSITION;
        assembly {
            ds.slot := position
        }
    }

    function setContractOwner(address _newOwner) internal {
        DiamondStorage storage ds = diamondStorage();
        address previousOwner = ds.contractOwner;
        ds.contractOwner = _newOwner;
        emit OwnershipTransferred(previousOwner, _newOwner);
    }

    function contractOwner() internal view returns (address contractOwner_) {
        contractOwner_ = diamondStorage().contractOwner;
    }

    function enforceIsContractOwner() internal view {
        if (msg.sender != diamondStorage().contractOwner) {
            revert NotContractOwner(msg.sender, diamondStorage().contractOwner);
        }
    }

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

    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 {
        if (_functionSelectors.length == 0) {
            revert NoSelectorsInFacet(_facetAddress);
        }
        DiamondStorage storage ds = diamondStorage();
        if (_facetAddress == address(0)) {
            revert AddFacetCannotBeZero();
        }
        uint96 selectorPosition = uint96(ds.facetFunctionSelectors[_facetAddress].functionSelectors.length);
        if (selectorPosition == 0) {
            addFacet(ds, _facetAddress);
        }
        for (uint256 selectorIndex; selectorIndex < _functionSelectors.length; selectorIndex++) {
            bytes4 selector = _functionSelectors[selectorIndex];
            address oldFacetAddress = ds.selectorToFacetAndPosition[selector].facetAddress;
            if (oldFacetAddress != address(0)) {
                revert FunctionAlreadyExists(selector);
            }
            addFunction(ds, selector, selectorPosition, _facetAddress);
            selectorPosition++;
        }
    }

    function replaceFunctions(address _facetAddress, bytes4[] memory _functionSelectors) internal {
        if (_functionSelectors.length == 0) {
            revert NoSelectorsInFacet(_facetAddress);
        }
        DiamondStorage storage ds = diamondStorage();
        if (_facetAddress == address(0)) {
            revert AddFacetCannotBeZero();
        }
        uint96 selectorPosition = uint96(ds.facetFunctionSelectors[_facetAddress].functionSelectors.length);
        if (selectorPosition == 0) {
            addFacet(ds, _facetAddress);
        }
        for (uint256 selectorIndex; selectorIndex < _functionSelectors.length; selectorIndex++) {
            bytes4 selector = _functionSelectors[selectorIndex];
            address oldFacetAddress = ds.selectorToFacetAndPosition[selector].facetAddress;
            if (oldFacetAddress == _facetAddress) {
                revert ReplaceFunctionWithSameAddress(selector);
            }
            removeFunction(ds, oldFacetAddress, selector);
            addFunction(ds, selector, selectorPosition, _facetAddress);
            selectorPosition++;
        }
    }

    function removeFunctions(address _facetAddress, bytes4[] memory _functionSelectors) internal {
        if (_functionSelectors.length == 0) {
            revert NoSelectorsInFacet(_facetAddress);
        }
        DiamondStorage storage ds = diamondStorage();
        if (_facetAddress != address(0)) {
            revert RemoveFacetAddressMustBeZero(_facetAddress);
        }
        for (uint256 selectorIndex; selectorIndex < _functionSelectors.length; selectorIndex++) {
            bytes4 selector = _functionSelectors[selectorIndex];
            address oldFacetAddress = ds.selectorToFacetAndPosition[selector].facetAddress;
            removeFunction(ds, oldFacetAddress, selector);
        }
    }

    function addFacet(DiamondStorage storage ds, address _facetAddress) internal {
        enforceHasContractCode(_facetAddress);
        ds.facetFunctionSelectors[_facetAddress].facetAddressPosition = ds.facetAddresses.length;
        ds.facetAddresses.push(_facetAddress);
    }

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

    function removeFunction(DiamondStorage storage ds, address _facetAddress, bytes4 _selector) internal {
        if (_facetAddress == address(0)) {
            revert FunctionDoesNotExist(_selector);
        }
        uint256 selectorPosition = ds.selectorToFacetAndPosition[_selector].functionSelectorPosition;
        uint256 lastSelectorPosition = ds.facetFunctionSelectors[_facetAddress].functionSelectors.length - 1;
        if (selectorPosition != lastSelectorPosition) {
            bytes4 lastSelector = ds.facetFunctionSelectors[_facetAddress].functionSelectors[lastSelectorPosition];
            ds.facetFunctionSelectors[_facetAddress].functionSelectors[selectorPosition] = lastSelector;
            // forge-lint: disable-next-line(unsafe-typecast)
            ds.selectorToFacetAndPosition[lastSelector].functionSelectorPosition = uint96(selectorPosition);
        }
        ds.facetFunctionSelectors[_facetAddress].functionSelectors.pop();
        delete ds.selectorToFacetAndPosition[_selector];

        if (lastSelectorPosition == 0) {
            uint256 lastFacetAddressPosition = ds.facetAddresses.length - 1;
            uint256 facetAddressPosition = ds.facetFunctionSelectors[_facetAddress].facetAddressPosition;
            if (facetAddressPosition != lastFacetAddressPosition) {
                address lastFacetAddress = ds.facetAddresses[lastFacetAddressPosition];
                ds.facetAddresses[facetAddressPosition] = lastFacetAddress;
                ds.facetFunctionSelectors[lastFacetAddress].facetAddressPosition = facetAddressPosition;
            }
            ds.facetAddresses.pop();
            delete ds.facetFunctionSelectors[_facetAddress].facetAddressPosition;
        }
    }

    function initializeDiamondCut(address _init, bytes memory _calldata) internal {
        if (_init == address(0)) {
            return;
        }
        enforceHasContractCode(_init);
        (bool success, bytes memory error) = _init.delegatecall(_calldata);
        if (!success) {
            if (error.length > 0) {
                assembly {
                    let returndata_size := mload(error)
                    revert(add(32, error), returndata_size)
                }
            } else {
                revert InitializationFailed(_init, _calldata);
            }
        }
    }

    function enforceHasContractCode(address _contract) internal view {
        uint256 contractSize;
        assembly {
            contractSize := extcodesize(_contract)
        }
        if (contractSize == 0) {
            revert FacetHasNoCode(_contract);
        }
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

interface IDiamondCut {
    enum FacetCutAction {
        Add,
        Replace,
        Remove
    }

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

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

    function diamondCut(FacetCut[] calldata _diamondCut, address _init, bytes calldata _calldata) external;
}

{
  "remappings": [
    "solady/=lib/solady/src/",
    "@openzeppelin/contracts-upgradeable/=lib/openzeppelin-contracts-upgradeable/contracts/",
    "@openzeppelin/contracts/=lib/openzeppelin-contracts/contracts/",
    "erc4626-tests/=lib/openzeppelin-contracts-upgradeable/lib/erc4626-tests/",
    "forge-std/=lib/forge-std/src/",
    "halmos-cheatcodes/=lib/openzeppelin-contracts-upgradeable/lib/halmos-cheatcodes/src/",
    "openzeppelin-contracts-upgradeable/=lib/openzeppelin-contracts-upgradeable/",
    "openzeppelin-contracts/=lib/openzeppelin-contracts/"
  ],
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "metadata": {
    "useLiteralContent": false,
    "bytecodeHash": "ipfs",
    "appendCBOR": true
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "prague",
  "viaIR": false
}

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[{"inputs":[{"internalType":"address","name":"_contractOwner","type":"address"},{"internalType":"address","name":"_diamondCutFacet","type":"address"}],"stateMutability":"payable","type":"constructor"},{"inputs":[],"name":"AddFacetCannotBeZero","type":"error"},{"inputs":[{"internalType":"address","name":"_facetAddress","type":"address"}],"name":"FacetHasNoCode","type":"error"},{"inputs":[{"internalType":"bytes4","name":"_selector","type":"bytes4"}],"name":"FunctionAlreadyExists","type":"error"},{"inputs":[{"internalType":"bytes4","name":"_selector","type":"bytes4"}],"name":"FunctionDoesNotExist","type":"error"},{"inputs":[{"internalType":"address","name":"_initializationContractAddress","type":"address"},{"internalType":"bytes","name":"_calldata","type":"bytes"}],"name":"InitializationFailed","type":"error"},{"inputs":[{"internalType":"address","name":"_facetAddress","type":"address"}],"name":"NoSelectorsInFacet","type":"error"},{"inputs":[{"internalType":"address","name":"_facetAddress","type":"address"}],"name":"RemoveFacetAddressMustBeZero","type":"error"},{"inputs":[{"internalType":"bytes4","name":"_selector","type":"bytes4"}],"name":"ReplaceFunctionWithSameAddress","type":"error"},{"anonymous":false,"inputs":[{"components":[{"internalType":"address","name":"facetAddress","type":"address"},{"internalType":"enum IDiamondCut.FacetCutAction","name":"action","type":"uint8"},{"internalType":"bytes4[]","name":"functionSelectors","type":"bytes4[]"}],"indexed":false,"internalType":"struct IDiamondCut.FacetCut[]","name":"_diamondCut","type":"tuple[]"},{"indexed":false,"internalType":"address","name":"_init","type":"address"},{"indexed":false,"internalType":"bytes","name":"_calldata","type":"bytes"}],"name":"DiamondCut","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"stateMutability":"payable","type":"fallback"},{"stateMutability":"payable","type":"receive"}]

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0000000000000000000000009d981c98f434a43916cee87a649ff15cb252d70000000000000000000000000090089577b2c00ac1eb32610641df7547fd81defd

-----Decoded View---------------
Arg [0] : _contractOwner (address): 0x9D981C98F434A43916cee87a649ff15CB252d700
Arg [1] : _diamondCutFacet (address): 0x90089577b2C00ac1eB32610641dF7547fd81DeFd

-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 0000000000000000000000009d981c98f434a43916cee87a649ff15cb252d700
Arg [1] : 00000000000000000000000090089577b2c00ac1eb32610641df7547fd81defd