contract Router {
    struct DiamondArgs {
        address owner;
    }

    constructor(
        IDiamondCut.FacetCut[] memory _diamondCut,
        DiamondArgs memory _args
    ) {
        LibDiamond.diamondCut(_diamondCut, address(0), new bytes(0));
        LibDiamond.setContractOwner(_args.owner);

        LibDiamond.DiamondStorage storage ds = LibDiamond.diamondStorage();

        // adding ERC165 data
        ds.supportedInterfaces[type(IERC165).interfaceId] = true;
        ds.supportedInterfaces[type(IDiamondCut).interfaceId] = true;
        ds.supportedInterfaces[type(IDiamondLoupe).interfaceId] = true;
        ds.supportedInterfaces[type(IERC173).interfaceId] = true;
    }

    // Find facet for function that is called and execute the
    // function if a facet is found and return any value.
    fallback() external payable {
        LibDiamond.DiamondStorage storage ds = LibDiamond.diamondStorage();
        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())
            }
        }
    }
}
// Find facet for function that is called and execute the
// function if a facet is found and return any value.