// File: contracts/WaverFactory.sol



// SPDX-License-Identifier: BSL
pragma solidity ^0.8.17;

import "@openzeppelin/contracts/proxy/beacon/BeaconProxy.sol";
import "./WaverImplementationDiamond.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "./WaverBeacon.sol";

/// [BSL License]
/// @title Proxy contract factory.
/// @notice A proxy contracts are created through the main contract.
/// @author Ismailov Altynbek <altyni@gmail.com>

contract WaverFactory is Ownable {
    WaverBeacon internal immutable thisWaverBeacon; //Beacon that routes to implementation addresses.
    address public WaverContractAddress; //Address of the main contract

    mapping(uint256 => address) public MarriageID; //Mapping of the proxy contract addresses by ID.

    /* Address of the proxy implementation has to be passed to the Factory*/
    constructor(address _implementation) {
        thisWaverBeacon = new WaverBeacon(_implementation);
        WaverContractAddress = msg.sender;
    }

    /**
     * @notice changing the address of the main contract.
     * @param _mainContract the address of the main contract.
     */

    function changeAddress(address _mainContract) public onlyOwner {
        WaverContractAddress = _mainContract;
    }

    /**
     * @notice View function to get the address of the beacon.
     */

    function getBeacon() public view returns (address) {
        return address(thisWaverBeacon);

        /**
         * @notice Getting the current address of the current implementation.
         */
    }

    function getimplementation() public view returns (address) {
        return thisWaverBeacon.implementation();
    }

    /**
     * @notice A method for creating proxy contracts.   
     * @dev Only the main contract address can create proxy contracts. Beacon proxy is created with 
     the current implementation. 
     * @param _addressWaveContract Address of the main contract.   
     * @param id Marriage ID assigned by the main contract.
     * @param _waver Address of the prpoposer.
     * @param _proposed Address of the proposed.
     * @param _cmFee CM fee, as a small percentage of incoming and outgoing transactions.
     * @param _divideShare the share that will be divided among partners upon dissolution.
     */

    function newMarriage(
        address _addressWaveContract,
        uint256 id,
        address _waver,
        address _proposed,
        uint256 _policyDays,
        uint256 _cmFee,
        uint256 _minimumDeadline,
        uint256 _divideShare
    ) public returns (address) {
        require(WaverContractAddress == msg.sender, "ACCESS DENIED");
        bytes memory dataOfnewMarriage = abi.encodeWithSelector(
            WaverIDiamond(payable(address(0))).initialize.selector,
            _addressWaveContract,
            id,
            _waver,
            _proposed,
            _policyDays,
            _cmFee,
            _minimumDeadline,
            _divideShare
        );

        BeaconProxy NewMarriageBeaconProxy = new BeaconProxy(
            address(thisWaverBeacon),
            dataOfnewMarriage
        );

        MarriageID[id] = address(NewMarriageBeaconProxy);
        return address(NewMarriageBeaconProxy);
    }
}

// File: @openzeppelin/contracts/proxy/beacon/BeaconProxy.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (proxy/beacon/BeaconProxy.sol)

pragma solidity ^0.8.0;

import "./IBeacon.sol";
import "../Proxy.sol";
import "../ERC1967/ERC1967Upgrade.sol";

/**
 * @dev This contract implements a proxy that gets the implementation address for each call from a {UpgradeableBeacon}.
 *
 * The beacon address is stored in storage slot `uint256(keccak256('eip1967.proxy.beacon')) - 1`, so that it doesn't
 * conflict with the storage layout of the implementation behind the proxy.
 *
 * _Available since v3.4._
 */
contract BeaconProxy is Proxy, ERC1967Upgrade {
    /**
     * @dev Initializes the proxy with `beacon`.
     *
     * If `data` is nonempty, it's used as data in a delegate call to the implementation returned by the beacon. This
     * will typically be an encoded function call, and allows initializating the storage of the proxy like a Solidity
     * constructor.
     *
     * Requirements:
     *
     * - `beacon` must be a contract with the interface {IBeacon}.
     */
    constructor(address beacon, bytes memory data) payable {
        assert(_BEACON_SLOT == bytes32(uint256(keccak256("eip1967.proxy.beacon")) - 1));
        _upgradeBeaconToAndCall(beacon, data, false);
    }

    /**
     * @dev Returns the current beacon address.
     */
    function _beacon() internal view virtual returns (address) {
        return _getBeacon();
    }

    /**
     * @dev Returns the current implementation address of the associated beacon.
     */
    function _implementation() internal view virtual override returns (address) {
        return IBeacon(_getBeacon()).implementation();
    }

    /**
     * @dev Changes the proxy to use a new beacon. Deprecated: see {_upgradeBeaconToAndCall}.
     *
     * If `data` is nonempty, it's used as data in a delegate call to the implementation returned by the beacon.
     *
     * Requirements:
     *
     * - `beacon` must be a contract.
     * - The implementation returned by `beacon` must be a contract.
     */
    function _setBeacon(address beacon, bytes memory data) internal virtual {
        _upgradeBeaconToAndCall(beacon, data, false);
    }
}

// File: contracts/WaverImplementationDiamond.sol



// SPDX-License-Identifier: BSL
pragma solidity ^0.8.17;

/**
*   [BSL License]
*   @title CM Proxy contract implementation.
*   @notice Individual contract is created after proposal has been sent to the partner. 
    ETH stake will be deposited to this newly created contract.
*   @dev The proxy uses Diamond Pattern for modularity. Relevant code was borrowed from  
    Nick Mudge <nick@perfectabstractions.com>. 
*   Reimbursement of sponsored TXFee through 
    MinimalForwarder, amounts to full estimated TX Costs of relevant 
    functions.   
*   @author Ismailov Altynbek <altyni@gmail.com>
*/

import "@gnus.ai/contracts-upgradeable-diamond/proxy/utils/Initializable.sol";
import "@gnus.ai/contracts-upgradeable-diamond/security/ReentrancyGuardUpgradeable.sol";
import "@gnus.ai/contracts-upgradeable-diamond/metatx/ERC2771ContextUpgradeable.sol";
import "@gnus.ai/contracts-upgradeable-diamond/metatx/MinimalForwarderUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol";
import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import "./handlers/SecuredTokenTransfer.sol";
import "./handlers/DefaultCallbackHandler.sol";

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

/*Interface for the Main Contract*/
interface WaverContract {
    function burn(address _to, uint256 _amount) external;

    function addFamilyMember(address, uint256) external;

    function cancel(uint256) external;

    function deleteFamilyMember(address, uint) external;

    function divorceUpdate(uint256 _id) external;

    function addressNFTSplit() external returns (address);
    
    function promoDays() external returns (uint);
}

/*Interface for the NFT Split Contract*/

interface nftSplitInstance {
    function splitNFT(
        address _nft_Address,
        uint256 _tokenID,
        string memory image,
        address waver,
        address proposed,
        address _implementationAddr,
        uint shareDivide
    ) external;
}

contract WaverIDiamond is
    Initializable,
    SecuredTokenTransfer,
    DefaultCallbackHandler,
    ERC2771ContextUpgradeable,
    ReentrancyGuardUpgradeable
{
    address immutable diamondcut;
    /*Constructor to connect Forwarder Address*/
    constructor(MinimalForwarderUpgradeable forwarder, address _diamondcut)
        initializer
        ERC2771ContextUpgradeable(address(forwarder))
    {diamondcut = _diamondcut;}

    /**
     * @notice Initialization function of the proxy contract
     * @dev Initialization params are passed from the main contract.
     * @param _addressWaveContract Address of the main contract.
     * @param _id Marriage ID assigned by the main contract.
     * @param _proposer Address of the prpoposer.
     * @param _proposer Address of the proposed.
     * @param _policyDays Cooldown before dissolution
     * @param _cmFee CM fee, as a small percentage of incoming and outgoing transactions.
     * @param _divideShare the share that will be divided among partners upon dissolution.
     */

    function initialize(
        address payable _addressWaveContract,
        uint256 _id,
        address _proposer,
        address _proposed,
        uint256 _policyDays,
        uint256 _cmFee,
        uint256 _minimumDeadline,
        uint256 _divideShare
    ) public initializer {
        VoteProposalLib.VoteTracking storage vt = VoteProposalLib
            .VoteTrackingStorage();
        unchecked {
            vt.voteid++;
        }
        vt.addressWaveContract = _addressWaveContract;
        vt.marriageStatus = VoteProposalLib.MarriageStatus.Proposed;
        vt.hasAccess[_proposer] = true;
        vt.id = _id;
        vt.proposer = _proposer;
        vt.proposed = _proposed;
        vt.cmFee = _cmFee;
        vt.policyDays = _policyDays;
        vt.setDeadline = _minimumDeadline;
        vt.divideShare = _divideShare;

        // Add the diamondCut external function from the diamondCutFacet
        IDiamondCut.FacetCut[] memory cut = new IDiamondCut.FacetCut[](1);

        bytes4[] memory functionSelectors = new bytes4[](1);

        functionSelectors[0] = IDiamondCut.diamondCut.selector;

        cut[0] = IDiamondCut.FacetCut({
            facetAddress: diamondcut,
            action: IDiamondCut.FacetCutAction.Add,
            functionSelectors: functionSelectors
        });

        LibDiamond.diamondCut(cut, address(0), "");
    }

    /**
     *@notice Proposer can cancel access to the contract if response has not been reveived or accepted. 
      The ETH balance of the contract will be sent to the proposer.   
     *@dev Once trigerred the access to the proxy contract will not be possible from the CM Frontend. Access is preserved 
     from the custom fronted such as Remix.   
     */

    function cancel() external {
        VoteProposalLib.enforceNotYetMarried();
        VoteProposalLib.enforceUserHasAccess(_msgSender());

        VoteProposalLib.VoteTracking storage vt = VoteProposalLib
            .VoteTrackingStorage();
        vt.marriageStatus = VoteProposalLib.MarriageStatus.Cancelled;
        WaverContract _wavercContract = WaverContract(vt.addressWaveContract);
        _wavercContract.cancel(vt.id);

        VoteProposalLib.processtxn(
            vt.addressWaveContract,
            (address(this).balance * vt.cmFee) / 10000
        );
        VoteProposalLib.processtxn(payable(vt.proposer), address(this).balance);
    }

    /**
     *@notice If the proposal is accepted, triggers this function to be added to the proxy contract.
     *@dev this function is called from the Main Contract.
     */

    function agreed() external {
        VoteProposalLib.enforceContractHasAccess();
        VoteProposalLib.VoteTracking storage vt = VoteProposalLib
            .VoteTrackingStorage();
        vt.marriageStatus = VoteProposalLib.MarriageStatus.Married;
        vt.marryDate = block.timestamp;
        vt.hasAccess[vt.proposed] = true;
        vt.familyMembers = 2;
    }

    /**
     *@notice If the proposal is declined, the status is changed accordingly.
     *@dev this function is called from the Main Contract.
     */

    function declined() external {
        VoteProposalLib.enforceContractHasAccess();
        VoteProposalLib.VoteTracking storage vt = VoteProposalLib
            .VoteTrackingStorage();
        vt.marriageStatus = VoteProposalLib.MarriageStatus.Declined;
    }

    error DISSOLUTION_COOLDOWN_NOT_PASSED(uint cooldown);
   
    /**
     * @notice Through this method proposals for voting is created. 
     * @dev All params are required. tokenID for the native currency is 0x0 address. To create proposals it is necessary to 
     have LOVE tokens as it will be used as backing of the proposal. 
     * @param _message String text on details of the proposal. 
     * @param _votetype Type of the proposal as it was listed in enum above. 
     * @param _voteends Timestamp on when the voting ends
     * @param _numTokens Number of LOVE tokens that is used to back this proposal. 
     * @param _receiver Address of the receiver who will be receiving indicated amounts. 
     * @param _tokenID Address of the ERC20, ERC721 or other tokens. 
     * @param _amount The amount of token that is being sent. Alternatively can be used as NFT ID. 
     */

    function createProposal(
        string calldata _message,
        uint8 _votetype,
        uint256 _voteends,
        uint256 _numTokens,
        address payable _receiver,
        address _tokenID,
        uint256 _amount
    ) external {
        address msgSender_ = _msgSender();
        VoteProposalLib.enforceUserHasAccess(msgSender_);
        VoteProposalLib.enforceMarried();


        VoteProposalLib.VoteTracking storage vt = VoteProposalLib
            .VoteTrackingStorage();

        WaverContract _wavercContract = WaverContract(vt.addressWaveContract);
          
        if (_votetype == 4) {
             //Cooldown has to pass before divorce is proposed.
            if (vt.marryDate + vt.policyDays > block.timestamp) { revert DISSOLUTION_COOLDOWN_NOT_PASSED(vt.marryDate + vt.policyDays );}
           
            //Only partners can propose divorce
            VoteProposalLib.enforceOnlyPartners(msgSender_);
            vt.numTokenFor[vt.voteid] = 1e30;
            _voteends = block.timestamp + 10 days;
        } else {
            vt.numTokenFor[vt.voteid] = _numTokens;
            if (_voteends < block.timestamp + vt.setDeadline) {_voteends = block.timestamp + vt.setDeadline; } //Checking for too short notice
        }

        vt.voteProposalAttributes[vt.voteid] = VoteProposalLib.VoteProposal({
            id: vt.voteid,
            proposer: msgSender_,
            voteType: _votetype,
            tokenVoteQuantity: _numTokens,
            voteProposalText: _message,
            voteStatus: 1,
            voteends: _voteends,
            receiver: _receiver,
            tokenID: _tokenID,
            amount: _amount,
            votersLeft: vt.familyMembers - 1
        });

        vt.votingStatus[vt.voteid][msgSender_] = true;
        _wavercContract.burn(msgSender_, _numTokens);

       emit VoteProposalLib.VoteStatus(
            vt.voteid,
            msgSender_,
            1,
            block.timestamp
        ); 

        unchecked {
            vt.voteid++;
        }
        checkForwarder(vt);
    }

    /**
     * @notice Through this method, proposals are voted for/against.  
     * @dev A user cannot vote twice. User cannot vote on voting which has been already passed/declined. Token staked is burnt.
     There is no explicit ways of identifying votes for or against the vote. 
     * @param _id Vote ID, that is being voted for/against. 
     * @param _numTokens Number of LOVE tokens that is being backed within the vote. 
     * @param responsetype Voting response for/against
     */

    function voteResponse(
        uint24 _id,
        uint256 _numTokens,
        uint8 responsetype
    ) external {
        address msgSender_ = _msgSender();
        VoteProposalLib.enforceUserHasAccess(msgSender_);
        VoteProposalLib.enforceNotVoted(_id,msgSender_);
        VoteProposalLib.enforceProposedStatus(_id);
        VoteProposalLib.VoteTracking storage vt = VoteProposalLib
            .VoteTrackingStorage();

        WaverContract _wavercContract = WaverContract(vt.addressWaveContract);

        vt.votingStatus[_id][msgSender_] = true;
        vt.voteProposalAttributes[_id].votersLeft -= 1;

        if (responsetype == 2) {
            vt.numTokenFor[_id] += _numTokens;
        } else {
            vt.numTokenAgainst[_id] += _numTokens;
        }

        if (vt.voteProposalAttributes[_id].votersLeft == 0) {
            if (vt.numTokenFor[_id] < vt.numTokenAgainst[_id]) {
                vt.voteProposalAttributes[_id].voteStatus = 3;
            } else {
                vt.voteProposalAttributes[_id].voteStatus = 2;
            }
        }

        _wavercContract.burn(msgSender_, _numTokens);
         emit VoteProposalLib.VoteStatus(
            _id,
            msgSender_,
            vt.voteProposalAttributes[_id].voteStatus,
            block.timestamp
        );  
        checkForwarder(vt);
    }

    /**
     * @notice The vote can be cancelled by the proposer if it has not been passed.
     * @dev once cancelled the proposal cannot be voted or executed.
     * @param _id Vote ID, that is being voted for/against.
     */

    function cancelVoting(uint24 _id) external {
        address msgSender_ = _msgSender();
        VoteProposalLib.enforceProposedStatus(_id);
        VoteProposalLib.enforceOnlyProposer(_id, msgSender_);
        VoteProposalLib.VoteTracking storage vt = VoteProposalLib
            .VoteTrackingStorage();
        vt.voteProposalAttributes[_id].voteStatus = 4;

       emit VoteProposalLib.VoteStatus(
            _id,
            msgSender_,
            vt.voteProposalAttributes[_id].voteStatus,
            block.timestamp
        ); 
        checkForwarder(vt);
    }

    /**
     * @notice The vote can be processed if deadline has been passed.
     * @dev voteend is compounded. The status of the vote proposal depends on number of Tokens voted for/against.
     * @param _id Vote ID, that is being voted for/against.
     */

    function endVotingByTime(uint24 _id) external {
        address msgSender_ = _msgSender();
        VoteProposalLib.enforceOnlyPartners(msgSender_);
        VoteProposalLib.enforceProposedStatus(_id);
        VoteProposalLib.enforceDeadlinePassed(_id);

        VoteProposalLib.VoteTracking storage vt = VoteProposalLib
            .VoteTrackingStorage();

        if (vt.numTokenFor[_id] < vt.numTokenAgainst[_id]) {
            vt.voteProposalAttributes[_id].voteStatus = 3;
        } else {
            vt.voteProposalAttributes[_id].voteStatus = 7;
        }

      emit VoteProposalLib.VoteStatus(
            _id,
            msgSender_ ,
            vt.voteProposalAttributes[_id].voteStatus,
            block.timestamp
        ); 
        checkForwarder(vt);
    }

error VOTE_ID_NOT_FOUND();
    /**
     * @notice If the proposal has been passed, depending on vote type, the proposal is executed.
     * @dev  Two external protocols are used Uniswap and Compound.
     * @param _id Vote ID, that is being voted for/against.
     */

    function executeVoting(uint24 _id) external nonReentrant {
        VoteProposalLib.enforceMarried();
        VoteProposalLib.enforceUserHasAccess(msg.sender);
        VoteProposalLib.enforceAcceptedStatus(_id);
        VoteProposalLib.VoteTracking storage vt = VoteProposalLib
            .VoteTrackingStorage();

        WaverContract _wavercContract = WaverContract(vt.addressWaveContract);
        //A small fee for the protocol is deducted here
        uint256 _amount = (vt.voteProposalAttributes[_id].amount *
            (10000 - vt.cmFee)) / 10000;
        uint256 _cmfees = vt.voteProposalAttributes[_id].amount - _amount;

        // Sending ETH from the contract
        if (vt.voteProposalAttributes[_id].voteType == 3) {
            vt.voteProposalAttributes[_id].voteStatus = 5;
            VoteProposalLib.processtxn(vt.addressWaveContract, _cmfees);
            VoteProposalLib.processtxn(
                payable(vt.voteProposalAttributes[_id].receiver),
                _amount
            );
            
        }
        //Sending ERC20 tokens owned by the contract
        else if (vt.voteProposalAttributes[_id].voteType == 2) {
            vt.voteProposalAttributes[_id].voteStatus = 5;
            require(
                transferToken(
                    vt.voteProposalAttributes[_id].tokenID,
                    vt.addressWaveContract,
                    _cmfees
                ),"I101"
            );
            require(
                transferToken(
                    vt.voteProposalAttributes[_id].tokenID,
                    payable(vt.voteProposalAttributes[_id].receiver),
                    _amount
                ),"I101"
            );
            
        }
         else if (vt.voteProposalAttributes[_id].voteType == 3) {
            VoteProposalLib.processtxn(vt.addressWaveContract, _cmfees);
            VoteProposalLib.processtxn(payable(vt.voteProposalAttributes[_id].receiver), _amount);
        
            vt.voteProposalAttributes[_id].voteStatus = 5;
        }
        //This is if two sides decide to divorce, funds are split between partners
        else if (vt.voteProposalAttributes[_id].voteType == 4) {
            vt.marriageStatus = VoteProposalLib.MarriageStatus.Divorced;
            vt.voteProposalAttributes[_id].voteStatus = 6;

            VoteProposalLib.processtxn(
                vt.addressWaveContract,
                (address(this).balance * vt.cmFee) / 10000
            );

            uint256 shareProposer = address(this).balance * vt.divideShare/10;
            uint256 shareProposed = address(this).balance - shareProposer;

            VoteProposalLib.processtxn(payable(vt.proposer), shareProposer);
            VoteProposalLib.processtxn(payable(vt.proposed), shareProposed);

            _wavercContract.divorceUpdate(vt.id);

            //Sending ERC721 tokens owned by the contract
        } else if (vt.voteProposalAttributes[_id].voteType == 5) {
            vt.voteProposalAttributes[_id].voteStatus = 10;
            IERC721(vt.voteProposalAttributes[_id].tokenID).safeTransferFrom(
                address(this),
                vt.voteProposalAttributes[_id].receiver,
                vt.voteProposalAttributes[_id].amount
            );
            
        } else if (vt.voteProposalAttributes[_id].voteType == 6) {
            vt.voteProposalAttributes[_id].voteStatus = 11;
            vt.setDeadline = vt.voteProposalAttributes[_id].amount;
        } else {
            revert VOTE_ID_NOT_FOUND();
        }
       emit VoteProposalLib.VoteStatus(
            _id,
            msg.sender,
            vt.voteProposalAttributes[_id].voteStatus,
            block.timestamp
        ); 
    }

    /**
     * @notice Function to reimburse transactions costs of relayers. 
     * @dev 1050000 is a max gas limit put by the OZ relaying platform. 2400 is .call gas cost that was not taken into account.
     * @param vt is a storage parameter to process payment.      
     */

    function checkForwarder(
        VoteProposalLib.VoteTracking storage vt
    ) internal {
        if (isTrustedForwarder(msg.sender)) {
            uint Gasleft = (1050000- gasleft() + 2400)* tx.gasprice;
            VoteProposalLib.processtxn(
                vt.addressWaveContract,
                Gasleft
            );
        }
    }
      /**
     * @notice A view function to monitor balance
     */

    function balance() external view returns (uint ETHBalance) {
       return address(this).balance;
    }

    error TOO_MANY_MEMBERS();
    /**
     * @notice Through this method a family member can be invited. Once added, the user needs to accept invitation.
     * @dev Only partners can add new family member. Partners cannot add their current addresses.
     * @param _member The address who are being invited to the proxy.
     */

    function addFamilyMember(address _member) external {
        address msgSender_ = _msgSender();
        VoteProposalLib.enforceOnlyPartners(msgSender_);
        VoteProposalLib.enforceNotPartnerAddr(_member);
        VoteProposalLib.VoteTracking storage vt = VoteProposalLib
            .VoteTrackingStorage();
        if (vt.familyMembers > 50) {revert TOO_MANY_MEMBERS();}
       
        WaverContract _waverContract = WaverContract(vt.addressWaveContract);
        _waverContract.addFamilyMember(_member, vt.id);
        checkForwarder(vt);
    }

    /**
     * @notice Through this method a family member is added once invitation is accepted.
     * @dev This method is called by the main contract.
     * @param _member The address that is being added.
     */

    function _addFamilyMember(address _member) external {
        VoteProposalLib.enforceContractHasAccess();
        VoteProposalLib.VoteTracking storage vt = VoteProposalLib
            .VoteTrackingStorage();
        vt.hasAccess[_member] = true;
        vt.familyMembers += 1;
    }

    /**
     * @notice Through this method a family member can be deleted. Member can be deleted by partners or by the members own address.
     * @dev Member looses access and will not be able to access to the proxy contract from the front end. Member address cannot be that of partners'.
     * @param _member The address who are being deleted.
     */

    function deleteFamilyMember(address _member) external {
        address msgSender_ = _msgSender();
        VoteProposalLib.enforceOnlyPartners(msgSender_);
        VoteProposalLib.enforceNotPartnerAddr(_member);
        VoteProposalLib.VoteTracking storage vt = VoteProposalLib
            .VoteTrackingStorage();

        WaverContract _waverContract = WaverContract(vt.addressWaveContract);

        _waverContract.deleteFamilyMember(_member,vt.id);
        if (vt.hasAccess[_member] == true) {
        delete vt.hasAccess[_member];
        vt.familyMembers -= 1;}
        checkForwarder(vt);
    }

    /* Divorce settlement. Once Divorce is processed there are 
    other assets that have to be split*/

    /**
     * @notice Once divorced, partners can split ERC20 tokens owned by the proxy contract.
     * @dev Each partner/or other family member can call this function to transfer ERC20 to respective wallets.
     * @param _tokenID the address of the ERC20 token that is being split.
     */

    function withdrawERC20(address _tokenID) external {
        VoteProposalLib.enforceOnlyPartners(msg.sender);
        VoteProposalLib.enforceDivorced();
        VoteProposalLib.VoteTracking storage vt = VoteProposalLib
            .VoteTrackingStorage();
        uint256 amount = IERC20Upgradeable(_tokenID).balanceOf(address(this));
        uint256 amountFee = (amount * vt.cmFee) / 10000;

        require(
            transferToken(
                _tokenID,
                vt.addressWaveContract,
                amountFee
            ),"I101"
        );
         amount = (amount - amountFee);
        uint256 shareProposer = amount * vt.divideShare/10;
        uint256 shareProposed = amount - shareProposer;

        require(transferToken(_tokenID, vt.proposer, shareProposer),"I101");
        require(transferToken(_tokenID, vt.proposed, shareProposed),"I101");
    }

    /**
     * @notice Once divorced, partners can split ERC721 tokens owned by the proxy contract. 
     * @dev Each partner/or other family member can call this function to split ERC721 token between partners.
     Two identical copies of ERC721 will be created by the NFT Splitter contract creating a new ERC1155 token.
      The token will be marked as "Copy". 
     To retreive the original copy, the owner needs to have both copies of the NFT. 

     * @param _tokenAddr the address of the ERC721 token that is being split. 
     * @param _tokenID the ID of the ERC721 token that is being split
     * @param image the Image of the NFT 
     */

    function SplitNFT(
        address _tokenAddr,
        uint256 _tokenID,
        string calldata image
    ) external {
        VoteProposalLib.enforceOnlyPartners(msg.sender);
        VoteProposalLib.enforceDivorced();
        VoteProposalLib.VoteTracking storage vt = VoteProposalLib
            .VoteTrackingStorage();

        WaverContract _wavercContract = WaverContract(vt.addressWaveContract);
        address nftSplitAddr = _wavercContract.addressNFTSplit(); //gets NFT splitter address from the main contract
        nftSplitInstance nftSplit = nftSplitInstance(nftSplitAddr);
        nftSplit.splitNFT(
            _tokenAddr,
            _tokenID,
            image,
            vt.proposer,
            vt.proposed,
            address(this),
            vt.divideShare
        ); //A copy of the NFT is created by the NFT Splitter.
    }

    /**
     * @notice If partner acquires both copies of NFTs, the NFT can be redeemed by that partner through NFT Splitter contract. 
     NFT Splitter uses this function to implement transfer of the token. Only Splitter Contract can call this function. 
     * @param _tokenAddr the address of the ERC721 token that is being joined. 
     * @param _receipent the address of the ERC721 token that is being sent. 
     * @param _tokenID the ID of the ERC721 token that is being sent
     */

    function sendNft(
        address _tokenAddr,
        address _receipent,
        uint256 _tokenID
    ) external {
        VoteProposalLib.VoteTracking storage vt = VoteProposalLib
            .VoteTrackingStorage();
        WaverContract _wavercContract = WaverContract(vt.addressWaveContract);
        if (_wavercContract.addressNFTSplit() != msg.sender) {revert VoteProposalLib.CONTRACT_NOT_AUTHORIZED(msg.sender);}
        IERC721(_tokenAddr).safeTransferFrom(
            address(this),
            _receipent,
            _tokenID
        );
    }

    /* Checking and Querying the voting data*/

    /* This view function returns how many votes has been created*/
    function getVoteLength() external view returns (uint256) {
        VoteProposalLib.VoteTracking storage vt = VoteProposalLib
            .VoteTrackingStorage();
        return vt.voteid - 1;
    }

    /**
     * @notice This function is used to query votings.  
     * @dev Since there is no limit for the number of voting proposals, the proposals are paginated. 
     Web queries page number to get voting statuses. Each page has 20 vote proposals. 
     * @param _pagenumber A page number queried.   
     */

    function getVotingStatuses(uint24 _pagenumber)
        external
        view
        returns (VoteProposalLib.VoteProposal[] memory)
    {
        VoteProposalLib.enforceUserHasAccess(msg.sender);

        VoteProposalLib.VoteTracking storage vt = VoteProposalLib
            .VoteTrackingStorage();
        uint24 length = vt.voteid - 1;
        uint24 page = length / 20;
        uint24 size = 0;
        uint24 start = 0;
        if (_pagenumber * 20 > length) {
            size = length % 20;
            if (size == 0 && page != 0) {
                size = 20;
                page -= 1;
            }
            start = page * 20 + 1;
        } else if (_pagenumber * 20 <= length) {
            size = 20;
            start = (_pagenumber - 1) * 20 + 1;
        }

        VoteProposalLib.VoteProposal[]
            memory votings = new VoteProposalLib.VoteProposal[](size);

        for (uint24 i = 0; i < size; i++) {
            votings[i] = vt.voteProposalAttributes[start + i];
        }
        return votings;
    }
    /* Getter of Family Members Number*/
    function getFamilyMembersNumber() external view returns (uint256) {
        VoteProposalLib.VoteTracking storage vt = VoteProposalLib
            .VoteTrackingStorage();
        return vt.familyMembers;
    }

    /* Getter of Family Members Number*/
    function getCMfee() external view returns (uint256) {
        VoteProposalLib.VoteTracking storage vt = VoteProposalLib
            .VoteTrackingStorage();
        return vt.cmFee;
    }
  
      /* Getter of cooldown before divorce*/

    function getPolicies() external view 
    returns (uint policyDays, uint marryDate, uint divideShare, uint setDeadline) 
    {
        VoteProposalLib.VoteTracking storage vt = VoteProposalLib
            .VoteTrackingStorage();
        return (vt.policyDays,
                vt.marryDate,
                vt.divideShare,
                vt.setDeadline);
    }

    error NOT_IN_PROMO();
    /**
     * @notice A user may have a promo period with zero comissions 
     * @dev a function may be called externally and triggered by bot to check whether promo period has passed.  
     */
    function resetFee() external {
        VoteProposalLib.VoteTracking storage vt = VoteProposalLib
            .VoteTrackingStorage();
        if (vt.cmFee>0) {revert NOT_IN_PROMO(); }
        WaverContract _wavercContract = WaverContract(vt.addressWaveContract);
        if (vt.marryDate + _wavercContract.promoDays() < block.timestamp) {
            vt.cmFee = 100;
        }   
    }

 /* Getter of marriage status*/
    function getMarriageStatus()
        external
        view
        returns (VoteProposalLib.MarriageStatus)
    {
        VoteProposalLib.VoteTracking storage vt = VoteProposalLib
            .VoteTrackingStorage();
        return vt.marriageStatus;
    }

    /* Checker of whether Module (Facet) is connected*/
    function checkAppConnected(address appAddress)
        external
        view
        returns (bool)
    {
        LibDiamond.DiamondStorage storage ds = LibDiamond.diamondStorage();
        return ds.connectedApps[appAddress];
    }

    error FACET_DOES_NOT_EXIST(address facet);
    // 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;
        bytes32 position = LibDiamond.DIAMOND_STORAGE_POSITION;
        // get diamond storage
        assembly {
            ds.slot := position
        }
        // get facet from function selector
        address facet = ds
            .facetAddressAndSelectorPosition[msg.sig]
            .facetAddress;
        if (facet == address(0)) {revert FACET_DOES_NOT_EXIST(facet);}
        // 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())
            }
        }
    }

    /**
     * @notice A fallback function that receives native currency.
     * @dev It is required that the status is not divorced so that funds are not locked.
     */
    receive() external payable {
        require(msg.value > 0);
        if (gasleft() > 2300) {
            VoteProposalLib.enforceNotDivorced();
            VoteProposalLib.VoteTracking storage vt = VoteProposalLib
                .VoteTrackingStorage();
            VoteProposalLib.processtxn(
                vt.addressWaveContract,
                (msg.value * vt.cmFee) / 10000
            );
            emit VoteProposalLib.AddStake(
                msg.sender,
                address(this),
                block.timestamp,
                msg.value
            ); 
        }
    }
}

// File: @openzeppelin/contracts/access/Ownable.sol



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

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

// File: contracts/WaverBeacon.sol



// SPDX-License-Identifier: BSL

pragma solidity ^0.8.17;
/// [BSL License]
/// @title Beacon contract
/// @notice This contract assigns implementation of proxy contracts.
/// @author Ismailov Altynbek <altyni@gmail.com>

import "@openzeppelin/contracts/proxy/beacon/UpgradeableBeacon.sol";
import "@openzeppelin/contracts/access/Ownable.sol";

contract WaverBeacon is Ownable {
    UpgradeableBeacon internal immutable beacon; // Current address of the contract
    address public implementation; //Current Address of the implementation

    /* @notice Address of the proxy implementation has to be passed to the Bacon
   @dev tx.origin is used once to transfer ownership to the deploying wallet  
*/

    constructor(address _initWaverImplementation) {
        beacon = new UpgradeableBeacon(_initWaverImplementation);
        implementation = _initWaverImplementation;
        //waverImplementation=_initWaverImplementation;
        transferOwnership(tx.origin);
    }

    /* @notice Address of the new/upgraded implementation of the proxy.
   @dev New implementation will change the proxy contract.
   @param _newWaverImplementation New address of the implementation  
*/
    function update(address _newWaverImplementation) public onlyOwner {
        beacon.upgradeTo(_newWaverImplementation);
        implementation = _newWaverImplementation;
    }
}

// File: @openzeppelin/contracts/proxy/beacon/IBeacon.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (proxy/beacon/IBeacon.sol)

pragma solidity ^0.8.0;

/**
 * @dev This is the interface that {BeaconProxy} expects of its beacon.
 */
interface IBeacon {
    /**
     * @dev Must return an address that can be used as a delegate call target.
     *
     * {BeaconProxy} will check that this address is a contract.
     */
    function implementation() external view returns (address);
}

// File: @openzeppelin/contracts/proxy/Proxy.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (proxy/Proxy.sol)

pragma solidity ^0.8.0;

/**
 * @dev This abstract contract provides a fallback function that delegates all calls to another contract using the EVM
 * instruction `delegatecall`. We refer to the second contract as the _implementation_ behind the proxy, and it has to
 * be specified by overriding the virtual {_implementation} function.
 *
 * Additionally, delegation to the implementation can be triggered manually through the {_fallback} function, or to a
 * different contract through the {_delegate} function.
 *
 * The success and return data of the delegated call will be returned back to the caller of the proxy.
 */
abstract contract Proxy {
    /**
     * @dev Delegates the current call to `implementation`.
     *
     * This function does not return to its internal call site, it will return directly to the external caller.
     */
    function _delegate(address implementation) internal virtual {
        assembly {
            // Copy msg.data. We take full control of memory in this inline assembly
            // block because it will not return to Solidity code. We overwrite the
            // Solidity scratch pad at memory position 0.
            calldatacopy(0, 0, calldatasize())

            // Call the implementation.
            // out and outsize are 0 because we don't know the size yet.
            let result := delegatecall(gas(), implementation, 0, calldatasize(), 0, 0)

            // Copy the returned data.
            returndatacopy(0, 0, returndatasize())

            switch result
            // delegatecall returns 0 on error.
            case 0 {
                revert(0, returndatasize())
            }
            default {
                return(0, returndatasize())
            }
        }
    }

    /**
     * @dev This is a virtual function that should be overriden so it returns the address to which the fallback function
     * and {_fallback} should delegate.
     */
    function _implementation() internal view virtual returns (address);

    /**
     * @dev Delegates the current call to the address returned by `_implementation()`.
     *
     * This function does not return to its internall call site, it will return directly to the external caller.
     */
    function _fallback() internal virtual {
        _beforeFallback();
        _delegate(_implementation());
    }

    /**
     * @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if no other
     * function in the contract matches the call data.
     */
    fallback() external payable virtual {
        _fallback();
    }

    /**
     * @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if call data
     * is empty.
     */
    receive() external payable virtual {
        _fallback();
    }

    /**
     * @dev Hook that is called before falling back to the implementation. Can happen as part of a manual `_fallback`
     * call, or as part of the Solidity `fallback` or `receive` functions.
     *
     * If overriden should call `super._beforeFallback()`.
     */
    function _beforeFallback() internal virtual {}
}

// File: @openzeppelin/contracts/proxy/ERC1967/ERC1967Upgrade.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (proxy/ERC1967/ERC1967Upgrade.sol)

pragma solidity ^0.8.2;

import "../beacon/IBeacon.sol";
import "../../interfaces/draft-IERC1822.sol";
import "../../utils/Address.sol";
import "../../utils/StorageSlot.sol";

/**
 * @dev This abstract contract provides getters and event emitting update functions for
 * https://eips.ethereum.org/EIPS/eip-1967[EIP1967] slots.
 *
 * _Available since v4.1._
 *
 * @custom:oz-upgrades-unsafe-allow delegatecall
 */
abstract contract ERC1967Upgrade {
    // This is the keccak-256 hash of "eip1967.proxy.rollback" subtracted by 1
    bytes32 private constant _ROLLBACK_SLOT = 0x4910fdfa16fed3260ed0e7147f7cc6da11a60208b5b9406d12a635614ffd9143;

    /**
     * @dev Storage slot with the address of the current implementation.
     * This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is
     * validated in the constructor.
     */
    bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;

    /**
     * @dev Emitted when the implementation is upgraded.
     */
    event Upgraded(address indexed implementation);

    /**
     * @dev Returns the current implementation address.
     */
    function _getImplementation() internal view returns (address) {
        return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
    }

    /**
     * @dev Stores a new address in the EIP1967 implementation slot.
     */
    function _setImplementation(address newImplementation) private {
        require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
        StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
    }

    /**
     * @dev Perform implementation upgrade
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeTo(address newImplementation) internal {
        _setImplementation(newImplementation);
        emit Upgraded(newImplementation);
    }

    /**
     * @dev Perform implementation upgrade with additional setup call.
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeToAndCall(
        address newImplementation,
        bytes memory data,
        bool forceCall
    ) internal {
        _upgradeTo(newImplementation);
        if (data.length > 0 || forceCall) {
            Address.functionDelegateCall(newImplementation, data);
        }
    }

    /**
     * @dev Perform implementation upgrade with security checks for UUPS proxies, and additional setup call.
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeToAndCallUUPS(
        address newImplementation,
        bytes memory data,
        bool forceCall
    ) internal {
        // Upgrades from old implementations will perform a rollback test. This test requires the new
        // implementation to upgrade back to the old, non-ERC1822 compliant, implementation. Removing
        // this special case will break upgrade paths from old UUPS implementation to new ones.
        if (StorageSlot.getBooleanSlot(_ROLLBACK_SLOT).value) {
            _setImplementation(newImplementation);
        } else {
            try IERC1822Proxiable(newImplementation).proxiableUUID() returns (bytes32 slot) {
                require(slot == _IMPLEMENTATION_SLOT, "ERC1967Upgrade: unsupported proxiableUUID");
            } catch {
                revert("ERC1967Upgrade: new implementation is not UUPS");
            }
            _upgradeToAndCall(newImplementation, data, forceCall);
        }
    }

    /**
     * @dev Storage slot with the admin of the contract.
     * This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1, and is
     * validated in the constructor.
     */
    bytes32 internal constant _ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;

    /**
     * @dev Emitted when the admin account has changed.
     */
    event AdminChanged(address previousAdmin, address newAdmin);

    /**
     * @dev Returns the current admin.
     */
    function _getAdmin() internal view returns (address) {
        return StorageSlot.getAddressSlot(_ADMIN_SLOT).value;
    }

    /**
     * @dev Stores a new address in the EIP1967 admin slot.
     */
    function _setAdmin(address newAdmin) private {
        require(newAdmin != address(0), "ERC1967: new admin is the zero address");
        StorageSlot.getAddressSlot(_ADMIN_SLOT).value = newAdmin;
    }

    /**
     * @dev Changes the admin of the proxy.
     *
     * Emits an {AdminChanged} event.
     */
    function _changeAdmin(address newAdmin) internal {
        emit AdminChanged(_getAdmin(), newAdmin);
        _setAdmin(newAdmin);
    }

    /**
     * @dev The storage slot of the UpgradeableBeacon contract which defines the implementation for this proxy.
     * This is bytes32(uint256(keccak256('eip1967.proxy.beacon')) - 1)) and is validated in the constructor.
     */
    bytes32 internal constant _BEACON_SLOT = 0xa3f0ad74e5423aebfd80d3ef4346578335a9a72aeaee59ff6cb3582b35133d50;

    /**
     * @dev Emitted when the beacon is upgraded.
     */
    event BeaconUpgraded(address indexed beacon);

    /**
     * @dev Returns the current beacon.
     */
    function _getBeacon() internal view returns (address) {
        return StorageSlot.getAddressSlot(_BEACON_SLOT).value;
    }

    /**
     * @dev Stores a new beacon in the EIP1967 beacon slot.
     */
    function _setBeacon(address newBeacon) private {
        require(Address.isContract(newBeacon), "ERC1967: new beacon is not a contract");
        require(
            Address.isContract(IBeacon(newBeacon).implementation()),
            "ERC1967: beacon implementation is not a contract"
        );
        StorageSlot.getAddressSlot(_BEACON_SLOT).value = newBeacon;
    }

    /**
     * @dev Perform beacon upgrade with additional setup call. Note: This upgrades the address of the beacon, it does
     * not upgrade the implementation contained in the beacon (see {UpgradeableBeacon-_setImplementation} for that).
     *
     * Emits a {BeaconUpgraded} event.
     */
    function _upgradeBeaconToAndCall(
        address newBeacon,
        bytes memory data,
        bool forceCall
    ) internal {
        _setBeacon(newBeacon);
        emit BeaconUpgraded(newBeacon);
        if (data.length > 0 || forceCall) {
            Address.functionDelegateCall(IBeacon(newBeacon).implementation(), data);
        }
    }
}

// File: @openzeppelin/contracts/interfaces/draft-IERC1822.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (interfaces/draft-IERC1822.sol)

pragma solidity ^0.8.0;

/**
 * @dev ERC1822: Universal Upgradeable Proxy Standard (UUPS) documents a method for upgradeability through a simplified
 * proxy whose upgrades are fully controlled by the current implementation.
 */
interface IERC1822Proxiable {
    /**
     * @dev Returns the storage slot that the proxiable contract assumes is being used to store the implementation
     * address.
     *
     * IMPORTANT: A proxy pointing at a proxiable contract should not be considered proxiable itself, because this risks
     * bricking a proxy that upgrades to it, by delegating to itself until out of gas. Thus it is critical that this
     * function revert if invoked through a proxy.
     */
    function proxiableUUID() external view returns (bytes32);
}

// File: @openzeppelin/contracts/utils/Address.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCall(target, data, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        require(isContract(target), "Address: call to non-contract");

        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");

        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");

        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly

                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

// File: @openzeppelin/contracts/utils/StorageSlot.sol



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

pragma solidity ^0.8.0;

/**
 * @dev Library for reading and writing primitive types to specific storage slots.
 *
 * Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts.
 * This library helps with reading and writing to such slots without the need for inline assembly.
 *
 * The functions in this library return Slot structs that contain a `value` member that can be used to read or write.
 *
 * Example usage to set ERC1967 implementation slot:
 * ```
 * contract ERC1967 {
 *     bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
 *
 *     function _getImplementation() internal view returns (address) {
 *         return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
 *     }
 *
 *     function _setImplementation(address newImplementation) internal {
 *         require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
 *         StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
 *     }
 * }
 * ```
 *
 * _Available since v4.1 for `address`, `bool`, `bytes32`, and `uint256`._
 */
library StorageSlot {
    struct AddressSlot {
        address value;
    }

    struct BooleanSlot {
        bool value;
    }

    struct Bytes32Slot {
        bytes32 value;
    }

    struct Uint256Slot {
        uint256 value;
    }

    /**
     * @dev Returns an `AddressSlot` with member `value` located at `slot`.
     */
    function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) {
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `BooleanSlot` with member `value` located at `slot`.
     */
    function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) {
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `Bytes32Slot` with member `value` located at `slot`.
     */
    function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) {
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `Uint256Slot` with member `value` located at `slot`.
     */
    function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) {
        assembly {
            r.slot := slot
        }
    }
}

// File: @gnus.ai/contracts-upgradeable-diamond/proxy/utils/Initializable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (proxy/utils/Initializable.sol)

pragma solidity ^0.8.0;

import "../../utils/AddressUpgradeable.sol";
import { InitializableStorage } from "./InitializableStorage.sol";

/**
 * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
 * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an
 * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
 * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
 *
 * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
 * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
 *
 * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
 * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
 *
 * [CAUTION]
 * ====
 * Avoid leaving a contract uninitialized.
 *
 * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
 * contract, which may impact the proxy. To initialize the implementation contract, you can either invoke the
 * initializer manually, or you can include a constructor to automatically mark it as initialized when it is deployed:
 *
 * [.hljs-theme-light.nopadding]
 * ```
 * /// @custom:oz-upgrades-unsafe-allow constructor
 * constructor() initializer {}
 * ```
 * ====
 */
abstract contract Initializable {

    /**
     * @dev Modifier to protect an initializer function from being invoked twice.
     */
    modifier initializer() {
        // If the contract is initializing we ignore whether _initialized is set in order to support multiple
        // inheritance patterns, but we only do this in the context of a constructor, because in other contexts the
        // contract may have been reentered.
        require(InitializableStorage.layout()._initializing ? _isConstructor() : !InitializableStorage.layout()._initialized, "Initializable: contract is already initialized");

        bool isTopLevelCall = !InitializableStorage.layout()._initializing;
        if (isTopLevelCall) {
            InitializableStorage.layout()._initializing = true;
            InitializableStorage.layout()._initialized = true;
        }

        _;

        if (isTopLevelCall) {
            InitializableStorage.layout()._initializing = false;
        }
    }

    /**
     * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the
     * {initializer} modifier, directly or indirectly.
     */
    modifier onlyInitializing() {
        require(InitializableStorage.layout()._initializing, "Initializable: contract is not initializing");
        _;
    }

    function _isConstructor() private view returns (bool) {
        return !AddressUpgradeable.isContract(address(this));
    }
}

// File: @gnus.ai/contracts-upgradeable-diamond/security/ReentrancyGuardUpgradeable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol)

pragma solidity ^0.8.0;
import { ReentrancyGuardStorage } from "./ReentrancyGuardStorage.sol";
import "../proxy/utils/Initializable.sol";

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract ReentrancyGuardUpgradeable is Initializable {
    using ReentrancyGuardStorage for ReentrancyGuardStorage.Layout;
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant _NOT_ENTERED = 1;
    uint256 private constant _ENTERED = 2;

    function __ReentrancyGuard_init() internal onlyInitializing {
        __ReentrancyGuard_init_unchained();
    }

    function __ReentrancyGuard_init_unchained() internal onlyInitializing {
        ReentrancyGuardStorage.layout()._status = _NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        // On the first call to nonReentrant, _notEntered will be true
        require(ReentrancyGuardStorage.layout()._status != _ENTERED, "ReentrancyGuard: reentrant call");

        // Any calls to nonReentrant after this point will fail
        ReentrancyGuardStorage.layout()._status = _ENTERED;

        _;

        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        ReentrancyGuardStorage.layout()._status = _NOT_ENTERED;
    }
}

// File: @gnus.ai/contracts-upgradeable-diamond/metatx/ERC2771ContextUpgradeable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (metatx/ERC2771Context.sol)

pragma solidity ^0.8.9;

import "../utils/ContextUpgradeable.sol";
import "../proxy/utils/Initializable.sol";

/**
 * @dev Context variant with ERC2771 support.
 */
abstract contract ERC2771ContextUpgradeable is Initializable, ContextUpgradeable {
    /// @custom:oz-upgrades-unsafe-allow state-variable-immutable
    address private immutable _trustedForwarder;

    /// @custom:oz-upgrades-unsafe-allow constructor
    constructor(address trustedForwarder) {
        _trustedForwarder = trustedForwarder;
    }

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

    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`.
            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: @gnus.ai/contracts-upgradeable-diamond/metatx/MinimalForwarderUpgradeable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (metatx/MinimalForwarder.sol)

pragma solidity ^0.8.0;

import "../utils/cryptography/ECDSAUpgradeable.sol";
import "../utils/cryptography/draft-EIP712Upgradeable.sol";
import { MinimalForwarderStorage } from "./MinimalForwarderStorage.sol";
import "../proxy/utils/Initializable.sol";

/**
 * @dev Simple minimal forwarder to be used together with an ERC2771 compatible contract. See {ERC2771Context}.
 */
contract MinimalForwarderUpgradeable is Initializable, EIP712Upgradeable {
    using MinimalForwarderStorage for MinimalForwarderStorage.Layout;
    using ECDSAUpgradeable for bytes32;

    struct ForwardRequest {
        address from;
        address to;
        uint256 value;
        uint256 gas;
        uint256 nonce;
        bytes data;
    }

    bytes32 private constant _TYPEHASH =
        keccak256("ForwardRequest(address from,address to,uint256 value,uint256 gas,uint256 nonce,bytes data)");

    function __MinimalForwarder_init() internal onlyInitializing {
        __EIP712_init_unchained("MinimalForwarder", "0.0.1");
        __MinimalForwarder_init_unchained();
    }

    function __MinimalForwarder_init_unchained() internal onlyInitializing {}

    function getNonce(address from) public view returns (uint256) {
        return MinimalForwarderStorage.layout()._nonces[from];
    }

    function verify(ForwardRequest calldata req, bytes calldata signature) public view returns (bool) {
        address signer = _hashTypedDataV4(
            keccak256(abi.encode(_TYPEHASH, req.from, req.to, req.value, req.gas, req.nonce, keccak256(req.data)))
        ).recover(signature);
        return MinimalForwarderStorage.layout()._nonces[req.from] == req.nonce && signer == req.from;
    }

    function execute(ForwardRequest calldata req, bytes calldata signature)
        public
        payable
        returns (bool, bytes memory)
    {
        require(verify(req, signature), "MinimalForwarder: signature does not match request");
        MinimalForwarderStorage.layout()._nonces[req.from] = req.nonce + 1;

        (bool success, bytes memory returndata) = req.to.call{gas: req.gas, value: req.value}(
            abi.encodePacked(req.data, req.from)
        );

        // Validate that the relayer has sent enough gas for the call.
        // See https://ronan.eth.link/blog/ethereum-gas-dangers/
        if (gasleft() <= req.gas / 63) {
            // We explicitly trigger invalid opcode to consume all gas and bubble-up the effects, since
            // neither revert or assert consume all gas since Solidity 0.8.0
            // https://docs.soliditylang.org/en/v0.8.0/control-structures.html#panic-via-assert-and-error-via-require
            assembly {
                invalid()
            }
        }

        return (success, returndata);
    }
}

// File: @openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20Upgradeable {
    /**
     * @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);

    /**
     * @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);
}

// File: @openzeppelin/contracts/token/ERC721/IERC721.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (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`, 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 Returns the account approved for `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function getApproved(uint256 tokenId) external view returns (address operator);

    /**
     * @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 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);

    /**
     * @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;
}

// File: contracts/handlers/SecuredTokenTransfer.sol



// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity >=0.8.0 <0.9.0;

/// @title SecuredTokenTransfer - Secure token transfer
/// @author Richard Meissner - <richard@gnosis.pm>
contract SecuredTokenTransfer {
    /// @dev Transfers a token and returns if it was a success
    /// @param token Token that should be transferred
    /// @param receiver Receiver to whom the token should be transferred
    /// @param amount The amount of tokens that should be transferred
    function transferToken(
        address token,
        address receiver,
        uint256 amount
    ) internal returns (bool transferred) {
        if (amount > 0) {
        // 0xa9059cbb - keccack("transfer(address,uint256)")
        bytes memory data = abi.encodeWithSelector(0xa9059cbb, receiver, amount);
        // solhint-disable-next-line no-inline-assembly
        assembly {
            // We write the return value to scratch space.
            // See https://docs.soliditylang.org/en/v0.7.6/internals/layout_in_memory.html#layout-in-memory
            let success := call(sub(gas(), 10000), token, 0, add(data, 0x20), mload(data), 0, 0x20)
            switch returndatasize()
                case 0 {
                    transferred := success
                }
                case 0x20 {
                    transferred := iszero(or(iszero(success), iszero(mload(0))))
                }
                default {
                    transferred := 0
                }
        } 
    } else {return true;}
    }
}
// File: contracts/handlers/DefaultCallbackHandler.sol



// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity ^0.8.17;

import "../interfaces/ERC1155TokenReceiver.sol";
import "../interfaces/ERC721TokenReceiver.sol";
import "@openzeppelin/contracts/utils/introspection/IERC165.sol";

/// @title Default Callback Handler - returns true for known token callbacks
/// @author Richard Meissner - <richard@gnosis.pm>
contract DefaultCallbackHandler is ERC1155TokenReceiver, ERC721TokenReceiver, IERC165 {

    function onERC1155Received(
        address,
        address,
        uint256,
        uint256,
        bytes calldata
    ) external pure override returns (bytes4) {
        return 0xf23a6e61;
    }

    function onERC1155BatchReceived(
        address,
        address,
        uint256[] calldata,
        uint256[] calldata,
        bytes calldata
    ) external pure override returns (bytes4) {
        return 0xbc197c81;
    }

    function onERC721Received(
        address,
        address,
        uint256,
        bytes calldata
    ) external pure override returns (bytes4) {
        return 0x150b7a02;
    }

    function supportsInterface(bytes4 interfaceId) external view virtual override returns (bool) {
        return
            interfaceId == type(ERC1155TokenReceiver).interfaceId ||
            interfaceId == type(ERC721TokenReceiver).interfaceId ||
            interfaceId == type(IERC165).interfaceId;
    }
}

// File: contracts/libraries/LibDiamond.sol



// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0 <0.9.0;

/******************************************************************************\
* Author: Nick Mudge <nick@perfectabstractions.com> (https://twitter.com/mudgen)
* EIP-2535 Diamonds: https://eips.ethereum.org/EIPS/eip-2535
/******************************************************************************/
import { IDiamondCut } from "../interfaces/IDiamondCut.sol";

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

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

    struct FacetAddressAndSelectorPosition {
        address facetAddress;
        uint16 selectorPosition;
    }
    //event DiamondCut(IDiamondCut.FacetCut[] _diamondCut, address _init, bytes _calldata);
    struct DiamondStorage {
        // function selector => facet address and selector position in selectors array
        mapping(bytes4 => FacetAddressAndSelectorPosition) facetAddressAndSelectorPosition;
        bytes4[] selectors;
        mapping(bytes4 => bool) supportedInterfaces;
        mapping(address => bool) connectedApps;
    }

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

    error DIAMOND_ACTION_NOT_FOUND();
     // Internal function version of diamondCut
    function diamondCut(
        IDiamondCut.FacetCut[] memory _diamondCut,
        address _init,
        bytes memory _calldata
    ) internal {
        for (uint256 facetIndex; facetIndex < _diamondCut.length; facetIndex++) {
            DiamondStorage storage ds = diamondStorage();
            IDiamondCut.FacetCutAction action = _diamondCut[facetIndex].action;
            if (action == IDiamondCut.FacetCutAction.Add) {
                addFunctions(_diamondCut[facetIndex].facetAddress, _diamondCut[facetIndex].functionSelectors);
                ds.connectedApps[_diamondCut[facetIndex].facetAddress] = true;
            } else if (action == IDiamondCut.FacetCutAction.Remove) {
                ds.connectedApps[ds.facetAddressAndSelectorPosition[_diamondCut[facetIndex].functionSelectors[0]].facetAddress] = false;
                removeFunctions(_diamondCut[facetIndex].facetAddress, _diamondCut[facetIndex].functionSelectors);
            } else {
                revert DIAMOND_ACTION_NOT_FOUND();
            }
        }
        //emit DiamondCut(_diamondCut, _init, _calldata);
        initializeDiamondCut(_init, _calldata);
    }
    error FUNCTION_SELECTORS_CANNOT_BE_EMPTY();
    error FACET_ADDRESS_CANNOT_BE_EMPTY();
    error FACET_ALREADY_EXISTS();
    function addFunctions(address _facetAddress, bytes4[] memory _functionSelectors) internal {
        if (_functionSelectors.length == 0) {revert FUNCTION_SELECTORS_CANNOT_BE_EMPTY();}
      
        DiamondStorage storage ds = diamondStorage();
        uint16 selectorCount = uint16(ds.selectors.length);
        if (_facetAddress == address(0)) {revert FACET_ADDRESS_CANNOT_BE_EMPTY();}
        enforceHasContractCode(_facetAddress,"");
        for (uint256 selectorIndex; selectorIndex < _functionSelectors.length; selectorIndex++) {
            bytes4 selector = _functionSelectors[selectorIndex];
            address oldFacetAddress = ds.facetAddressAndSelectorPosition[selector].facetAddress;
            if (oldFacetAddress != address(0)) {revert FACET_ALREADY_EXISTS();}
            ds.facetAddressAndSelectorPosition[selector] = FacetAddressAndSelectorPosition(_facetAddress, selectorCount);
            ds.selectors.push(selector);
            selectorCount++;
        }
    }

    function removeFunctions(address _facetAddress, bytes4[] memory _functionSelectors) internal {
        if (_functionSelectors.length == 0) {revert FUNCTION_SELECTORS_CANNOT_BE_EMPTY();}
        DiamondStorage storage ds = diamondStorage();
        uint256 selectorCount = ds.selectors.length;
        if (_facetAddress != address(0)) {revert FACET_ALREADY_EXISTS();}
        for (uint256 selectorIndex; selectorIndex < _functionSelectors.length; selectorIndex++) {
            bytes4 selector = _functionSelectors[selectorIndex];
            FacetAddressAndSelectorPosition memory oldFacetAddressAndSelectorPosition = ds.facetAddressAndSelectorPosition[selector];
            if (oldFacetAddressAndSelectorPosition.facetAddress == address(0)) {revert FACET_ADDRESS_CANNOT_BE_EMPTY();}
            // can't remove immutable functions -- functions defined directly in the diamond
            require(oldFacetAddressAndSelectorPosition.facetAddress != address(this));
            // replace selector with last selector
            selectorCount--;
            if (oldFacetAddressAndSelectorPosition.selectorPosition != selectorCount) {
                bytes4 lastSelector = ds.selectors[selectorCount];
                ds.selectors[oldFacetAddressAndSelectorPosition.selectorPosition] = lastSelector;
                ds.facetAddressAndSelectorPosition[lastSelector].selectorPosition = oldFacetAddressAndSelectorPosition.selectorPosition;
            }
            // delete last selector
            ds.selectors.pop();
            delete ds.facetAddressAndSelectorPosition[selector];
        }
    }

    function initializeDiamondCut(address _init, bytes memory _calldata) internal {
        if (_init == address(0)) {
            require(_calldata.length == 0);
        } else {
            require(_calldata.length > 0);
            if (_init != address(this)) {
                enforceHasContractCode(_init,"");
            }
            (bool success, bytes memory error) = _init.delegatecall(_calldata);
            if (!success) {
                if (error.length > 0) {
                    // bubble up the error
                    revert(string(error));
                } else {
                    revert();
                }
            }
        }
    }

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

// File: contracts/interfaces/IDiamondCut.sol



// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0 <0.9.0;

/******************************************************************************\
* Author: Nick Mudge <nick@perfectabstractions.com> (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: contracts/libraries/VotingStatusLib.sol



// SPDX-License-Identifier: BSL
pragma solidity ^0.8.17;

/**
*   [BSL License]
*   @title Library of the Proxy Contract
*   @notice Proxy contracts use variables from this libriary. 
*   @dev The proxy uses Diamond Pattern for modularity. Relevant code was borrowed from  
    Nick Mudge.    
*   @author Ismailov Altynbek <altyni@gmail.com>
*/

library VoteProposalLib {
    bytes32 constant VT_STORAGE_POSITION =
        keccak256("waverimplementation.VoteTracking.Lib"); //Storing position of the variables

    struct VoteProposal {
        uint24 id;
        address proposer;
        uint8 voteType;
        uint256 tokenVoteQuantity;
        string voteProposalText;
        uint8 voteStatus;
        uint256 voteends;
        address receiver;
        address tokenID;
        uint256 amount;
        uint8 votersLeft;
    }

    event VoteStatus(
        uint24 indexed id,
        address sender,
        uint8 voteStatus,
        uint256 timestamp
    );

    struct VoteTracking {
        uint8 familyMembers;
        MarriageStatus marriageStatus;
        uint24 voteid; //Tracking voting proposals by VOTEID
        address proposer;
        address proposed;
        address payable addressWaveContract;
        uint nonce;
        uint256 threshold;
        uint256 id;
        uint256 cmFee;
        uint256 marryDate;
        uint256 policyDays;
        uint256 setDeadline;
        uint256 divideShare;
        address [] subAccounts; //an Array of Subaccounts; 
        mapping(address => bool) hasAccess; //Addresses that are alowed to use Proxy contract
        mapping(uint24 => VoteProposal) voteProposalAttributes; //Storage of voting proposals
        mapping(uint24 => mapping(address => bool)) votingStatus; // Tracking whether address has voted for particular voteid
        mapping(uint24 => uint256) numTokenFor; //Number of tokens voted for the proposal
        mapping(uint24 => uint256) numTokenAgainst; //Number of tokens voted against the proposal
        mapping (uint => uint) indexBook; //Keeping track of indexes 
        mapping(uint => address) addressBook; //To keep Addresses inside
        mapping(address => uint) subAccountIndex;//To keep track of subAccounts
        mapping(bytes32 => uint256) signedMessages;
        mapping(address => mapping(bytes32 => uint256)) approvedHashes;
    }

    function VoteTrackingStorage()
        internal
        pure
        returns (VoteTracking storage vt)
    {
        bytes32 position = VT_STORAGE_POSITION;
        assembly {
            vt.slot := position
        }
    }

    error ALREADY_VOTED();

    function enforceNotVoted(uint24 _voteid, address msgSender_) internal view {
        if (VoteTrackingStorage().votingStatus[_voteid][msgSender_] == true) {
            revert ALREADY_VOTED();
        }
    }

    error VOTE_IS_CLOSED();

    function enforceProposedStatus(uint24 _voteid) internal view {
        if (
            VoteTrackingStorage().voteProposalAttributes[_voteid].voteStatus !=
            1
        ) {
            revert VOTE_IS_CLOSED();
        }
    }

    error VOTE_IS_NOT_PASSED();

    function enforceAcceptedStatus(uint24 _voteid) internal view {
        if (
            VoteTrackingStorage().voteProposalAttributes[_voteid].voteStatus !=
            2 &&
            VoteTrackingStorage().voteProposalAttributes[_voteid].voteStatus !=
            7
        ) {
            revert VOTE_IS_NOT_PASSED();
        }
    }

    error VOTE_PROPOSER_ONLY();

    function enforceOnlyProposer(uint24 _voteid, address msgSender_)
        internal
        view
    {
        if (
            VoteTrackingStorage().voteProposalAttributes[_voteid].proposer !=
            msgSender_
        ) {
            revert VOTE_PROPOSER_ONLY();
        }
    }

    error DEADLINE_NOT_PASSED();

    function enforceDeadlinePassed(uint24 _voteid) internal view {
        if (
            VoteTrackingStorage().voteProposalAttributes[_voteid].voteends >
            block.timestamp
        ) {
            revert DEADLINE_NOT_PASSED();
        }
    }

    /* Enum Statuses of the Marriage*/
    enum MarriageStatus {
        Proposed,
        Declined,
        Cancelled,
        Married,
        Divorced
    }

    /* Listening to whether ETH has been received/sent from the contract*/
    event AddStake(
        address indexed from,
        address indexed to,
        uint256 timestamp,
        uint256 amount
    );

    error USER_HAS_NO_ACCESS(address user);

    function enforceUserHasAccess(address msgSender_) internal view {
        if (VoteTrackingStorage().hasAccess[msgSender_] != true) {
            revert USER_HAS_NO_ACCESS(msgSender_);
        }
    }

    error USER_IS_NOT_PARTNER(address user);

    function enforceOnlyPartners(address msgSender_) internal view {
       
        if (
            VoteTrackingStorage().proposed != msgSender_ &&
            VoteTrackingStorage().proposer != msgSender_
        ) {
            revert USER_IS_NOT_PARTNER(msgSender_);
        } 
    }

    error CANNOT_USE_PARTNERS_ADDRESS();

    function enforceNotPartnerAddr(address _member) internal view {
        if (
            VoteTrackingStorage().proposed == _member &&
            VoteTrackingStorage().proposer == _member
        ) {
            revert CANNOT_USE_PARTNERS_ADDRESS();
        }
    }

    error CANNOT_PERFORM_WHEN_PARTNERSHIP_IS_ACTIVE();

    function enforceNotYetMarried() internal view {
        if (
            VoteTrackingStorage().marriageStatus != MarriageStatus.Proposed &&
            VoteTrackingStorage().marriageStatus != MarriageStatus.Declined
        ) {
            revert CANNOT_PERFORM_WHEN_PARTNERSHIP_IS_ACTIVE();
        }
    }

    error PARNERSHIP_IS_NOT_ESTABLISHED();

    function enforceMarried() internal view {
        if (VoteTrackingStorage().marriageStatus != MarriageStatus.Married) {
            revert PARNERSHIP_IS_NOT_ESTABLISHED();
        }
    }

    error PARNERSHIP_IS_DISSOLUTED();

    function enforceNotDivorced() internal view {
        if (VoteTrackingStorage().marriageStatus == MarriageStatus.Divorced) {
            revert PARNERSHIP_IS_DISSOLUTED();
        }
    }

    error PARTNERSHIP_IS_NOT_DISSOLUTED();

    function enforceDivorced() internal view {
        if (VoteTrackingStorage().marriageStatus != MarriageStatus.Divorced) {
            revert PARTNERSHIP_IS_NOT_DISSOLUTED();
        }
    }

    error CONTRACT_NOT_AUTHORIZED(address contractAddress);

    function enforceContractHasAccess() internal view {
        if (msg.sender != VoteTrackingStorage().addressWaveContract) {
            revert CONTRACT_NOT_AUTHORIZED(msg.sender);
        }
    }

    error COULD_NOT_PROCESS(address _to, uint256 amount);

    /**
     * @notice Internal function to process payments.
     * @dev call method is used to keep process gas limit higher than 2300. Amount of 0 will be skipped,
     * @param _to Address that will be reveiving payment
     * @param _amount the amount of payment
     */

    function processtxn(address payable _to, uint256 _amount) internal {
        if (_amount > 0) {
            (bool success, ) = _to.call{value: _amount}("");
            if (!success) {
                revert COULD_NOT_PROCESS(_to, _amount);
            }
            emit AddStake(address(this), _to, block.timestamp, _amount);
        }
    }
}

// File: @gnus.ai/contracts-upgradeable-diamond/utils/AddressUpgradeable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @dev Collection of functions related to the address type
 */
library AddressUpgradeable {
    /**
     * @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 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);
            }
        }
    }
}

// File: @gnus.ai/contracts-upgradeable-diamond/proxy/utils/InitializableStorage.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;


import { Initializable } from "./Initializable.sol";

library InitializableStorage {

  struct Layout {
    /*
     * @dev Indicates that the contract has been initialized.
     */
    bool _initialized;

    /*
     * @dev Indicates that the contract is in the process of being initialized.
     */
    bool _initializing;
  
  }
  
  bytes32 internal constant STORAGE_SLOT = keccak256('openzepplin.contracts.storage.Initializable');

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

// File: @gnus.ai/contracts-upgradeable-diamond/security/ReentrancyGuardStorage.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;


import { ReentrancyGuardUpgradeable } from "./ReentrancyGuardUpgradeable.sol";

library ReentrancyGuardStorage {

  struct Layout {

    uint256 _status;
  
  }
  
  bytes32 internal constant STORAGE_SLOT = keccak256('openzepplin.contracts.storage.ReentrancyGuard');

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

// File: @gnus.ai/contracts-upgradeable-diamond/utils/ContextUpgradeable.sol



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

pragma solidity ^0.8.0;
import "../proxy/utils/Initializable.sol";

/**
 * @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 ContextUpgradeable is Initializable {
    function __Context_init() internal onlyInitializing {
        __Context_init_unchained();
    }

    function __Context_init_unchained() internal onlyInitializing {
    }
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

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

// File: @gnus.ai/contracts-upgradeable-diamond/utils/cryptography/ECDSAUpgradeable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/cryptography/ECDSA.sol)

pragma solidity ^0.8.0;

import "../StringsUpgradeable.sol";

/**
 * @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
 *
 * These functions can be used to verify that a message was signed by the holder
 * of the private keys of a given address.
 */
library ECDSAUpgradeable {
    enum RecoverError {
        NoError,
        InvalidSignature,
        InvalidSignatureLength,
        InvalidSignatureS,
        InvalidSignatureV
    }

    function _throwError(RecoverError error) private pure {
        if (error == RecoverError.NoError) {
            return; // no error: do nothing
        } else if (error == RecoverError.InvalidSignature) {
            revert("ECDSA: invalid signature");
        } else if (error == RecoverError.InvalidSignatureLength) {
            revert("ECDSA: invalid signature length");
        } else if (error == RecoverError.InvalidSignatureS) {
            revert("ECDSA: invalid signature 's' value");
        } else if (error == RecoverError.InvalidSignatureV) {
            revert("ECDSA: invalid signature 'v' value");
        }
    }

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature` or error string. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
     * this function rejects them by requiring the `s` value to be in the lower
     * half order, and the `v` value to be either 27 or 28.
     *
     * IMPORTANT: `hash` _must_ be the result of a hash operation for the
     * verification to be secure: it is possible to craft signatures that
     * recover to arbitrary addresses for non-hashed data. A safe way to ensure
     * this is by receiving a hash of the original message (which may otherwise
     * be too long), and then calling {toEthSignedMessageHash} on it.
     *
     * Documentation for signature generation:
     * - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]
     * - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]
     *
     * _Available since v4.3._
     */
    function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) {
        // Check the signature length
        // - case 65: r,s,v signature (standard)
        // - case 64: r,vs signature (cf https://eips.ethereum.org/EIPS/eip-2098) _Available since v4.1._
        if (signature.length == 65) {
            bytes32 r;
            bytes32 s;
            uint8 v;
            // ecrecover takes the signature parameters, and the only way to get them
            // currently is to use assembly.
            assembly {
                r := mload(add(signature, 0x20))
                s := mload(add(signature, 0x40))
                v := byte(0, mload(add(signature, 0x60)))
            }
            return tryRecover(hash, v, r, s);
        } else if (signature.length == 64) {
            bytes32 r;
            bytes32 vs;
            // ecrecover takes the signature parameters, and the only way to get them
            // currently is to use assembly.
            assembly {
                r := mload(add(signature, 0x20))
                vs := mload(add(signature, 0x40))
            }
            return tryRecover(hash, r, vs);
        } else {
            return (address(0), RecoverError.InvalidSignatureLength);
        }
    }

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature`. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
     * this function rejects them by requiring the `s` value to be in the lower
     * half order, and the `v` value to be either 27 or 28.
     *
     * IMPORTANT: `hash` _must_ be the result of a hash operation for the
     * verification to be secure: it is possible to craft signatures that
     * recover to arbitrary addresses for non-hashed data. A safe way to ensure
     * this is by receiving a hash of the original message (which may otherwise
     * be too long), and then calling {toEthSignedMessageHash} on it.
     */
    function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, signature);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.
     *
     * See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]
     *
     * _Available since v4.3._
     */
    function tryRecover(
        bytes32 hash,
        bytes32 r,
        bytes32 vs
    ) internal pure returns (address, RecoverError) {
        bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff);
        uint8 v = uint8((uint256(vs) >> 255) + 27);
        return tryRecover(hash, v, r, s);
    }

    /**
     * @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately.
     *
     * _Available since v4.2._
     */
    function recover(
        bytes32 hash,
        bytes32 r,
        bytes32 vs
    ) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, r, vs);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Overload of {ECDSA-tryRecover} that receives the `v`,
     * `r` and `s` signature fields separately.
     *
     * _Available since v4.3._
     */
    function tryRecover(
        bytes32 hash,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal pure returns (address, RecoverError) {
        // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
        // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
        // the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most
        // signatures from current libraries generate a unique signature with an s-value in the lower half order.
        //
        // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
        // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
        // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
        // these malleable signatures as well.
        if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {
            return (address(0), RecoverError.InvalidSignatureS);
        }
        if (v != 27 && v != 28) {
            return (address(0), RecoverError.InvalidSignatureV);
        }

        // If the signature is valid (and not malleable), return the signer address
        address signer = ecrecover(hash, v, r, s);
        if (signer == address(0)) {
            return (address(0), RecoverError.InvalidSignature);
        }

        return (signer, RecoverError.NoError);
    }

    /**
     * @dev Overload of {ECDSA-recover} that receives the `v`,
     * `r` and `s` signature fields separately.
     */
    function recover(
        bytes32 hash,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, v, r, s);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Returns an Ethereum Signed Message, created from a `hash`. This
     * produces hash corresponding to the one signed with the
     * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
     * JSON-RPC method as part of EIP-191.
     *
     * See {recover}.
     */
    function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {
        // 32 is the length in bytes of hash,
        // enforced by the type signature above
        return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
    }

    /**
     * @dev Returns an Ethereum Signed Message, created from `s`. This
     * produces hash corresponding to the one signed with the
     * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
     * JSON-RPC method as part of EIP-191.
     *
     * See {recover}.
     */
    function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n", StringsUpgradeable.toString(s.length), s));
    }

    /**
     * @dev Returns an Ethereum Signed Typed Data, created from a
     * `domainSeparator` and a `structHash`. This produces hash corresponding
     * to the one signed with the
     * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]
     * JSON-RPC method as part of EIP-712.
     *
     * See {recover}.
     */
    function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash));
    }
}

// File: @gnus.ai/contracts-upgradeable-diamond/utils/cryptography/draft-EIP712Upgradeable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/cryptography/draft-EIP712.sol)

pragma solidity ^0.8.0;

import "./ECDSAUpgradeable.sol";
import { EIP712Storage } from "./draft-EIP712Storage.sol";
import "../../proxy/utils/Initializable.sol";

/**
 * @dev https://eips.ethereum.org/EIPS/eip-712[EIP 712] is a standard for hashing and signing of typed structured data.
 *
 * The encoding specified in the EIP is very generic, and such a generic implementation in Solidity is not feasible,
 * thus this contract does not implement the encoding itself. Protocols need to implement the type-specific encoding
 * they need in their contracts using a combination of `abi.encode` and `keccak256`.
 *
 * This contract implements the EIP 712 domain separator ({_domainSeparatorV4}) that is used as part of the encoding
 * scheme, and the final step of the encoding to obtain the message digest that is then signed via ECDSA
 * ({_hashTypedDataV4}).
 *
 * The implementation of the domain separator was designed to be as efficient as possible while still properly updating
 * the chain id to protect against replay attacks on an eventual fork of the chain.
 *
 * NOTE: This contract implements the version of the encoding known as "v4", as implemented by the JSON RPC method
 * https://docs.metamask.io/guide/signing-data.html[`eth_signTypedDataV4` in MetaMask].
 *
 * _Available since v3.4._
 */
abstract contract EIP712Upgradeable is Initializable {
    using EIP712Storage for EIP712Storage.Layout;
    bytes32 private constant _TYPE_HASH = keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)");

    /* solhint-enable var-name-mixedcase */

    /**
     * @dev Initializes the domain separator and parameter caches.
     *
     * The meaning of `name` and `version` is specified in
     * https://eips.ethereum.org/EIPS/eip-712#definition-of-domainseparator[EIP 712]:
     *
     * - `name`: the user readable name of the signing domain, i.e. the name of the DApp or the protocol.
     * - `version`: the current major version of the signing domain.
     *
     * NOTE: These parameters cannot be changed except through a xref:learn::upgrading-smart-contracts.adoc[smart
     * contract upgrade].
     */
    function __EIP712_init(string memory name, string memory version) internal onlyInitializing {
        __EIP712_init_unchained(name, version);
    }

    function __EIP712_init_unchained(string memory name, string memory version) internal onlyInitializing {
        bytes32 hashedName = keccak256(bytes(name));
        bytes32 hashedVersion = keccak256(bytes(version));
        EIP712Storage.layout()._HASHED_NAME = hashedName;
        EIP712Storage.layout()._HASHED_VERSION = hashedVersion;
    }

    /**
     * @dev Returns the domain separator for the current chain.
     */
    function _domainSeparatorV4() internal view returns (bytes32) {
        return _buildDomainSeparator(_TYPE_HASH, _EIP712NameHash(), _EIP712VersionHash());
    }

    function _buildDomainSeparator(
        bytes32 typeHash,
        bytes32 nameHash,
        bytes32 versionHash
    ) private view returns (bytes32) {
        return keccak256(abi.encode(typeHash, nameHash, versionHash, block.chainid, address(this)));
    }

    /**
     * @dev Given an already https://eips.ethereum.org/EIPS/eip-712#definition-of-hashstruct[hashed struct], this
     * function returns the hash of the fully encoded EIP712 message for this domain.
     *
     * This hash can be used together with {ECDSA-recover} to obtain the signer of a message. For example:
     *
     * ```solidity
     * bytes32 digest = _hashTypedDataV4(keccak256(abi.encode(
     *     keccak256("Mail(address to,string contents)"),
     *     mailTo,
     *     keccak256(bytes(mailContents))
     * )));
     * address signer = ECDSA.recover(digest, signature);
     * ```
     */
    function _hashTypedDataV4(bytes32 structHash) internal view virtual returns (bytes32) {
        return ECDSAUpgradeable.toTypedDataHash(_domainSeparatorV4(), structHash);
    }

    /**
     * @dev The hash of the name parameter for the EIP712 domain.
     *
     * NOTE: This function reads from storage by default, but can be redefined to return a constant value if gas costs
     * are a concern.
     */
    function _EIP712NameHash() internal virtual view returns (bytes32) {
        return EIP712Storage.layout()._HASHED_NAME;
    }

    /**
     * @dev The hash of the version parameter for the EIP712 domain.
     *
     * NOTE: This function reads from storage by default, but can be redefined to return a constant value if gas costs
     * are a concern.
     */
    function _EIP712VersionHash() internal virtual view returns (bytes32) {
        return EIP712Storage.layout()._HASHED_VERSION;
    }
}

// File: @gnus.ai/contracts-upgradeable-diamond/metatx/MinimalForwarderStorage.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;


import { MinimalForwarderUpgradeable } from "./MinimalForwarderUpgradeable.sol";

library MinimalForwarderStorage {

  struct Layout {

    mapping(address => uint256) _nonces;
  
  }
  
  bytes32 internal constant STORAGE_SLOT = keccak256('openzepplin.contracts.storage.MinimalForwarder');

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

// File: @gnus.ai/contracts-upgradeable-diamond/utils/StringsUpgradeable.sol



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

pragma solidity ^0.8.0;

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

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

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

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

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

// File: @gnus.ai/contracts-upgradeable-diamond/utils/cryptography/draft-EIP712Storage.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;


import { EIP712Upgradeable } from "./draft-EIP712Upgradeable.sol";

library EIP712Storage {

  struct Layout {
    /* solhint-disable var-name-mixedcase */
    bytes32 _HASHED_NAME;
    bytes32 _HASHED_VERSION;
  
  }
  
  bytes32 internal constant STORAGE_SLOT = keccak256('openzepplin.contracts.storage.EIP712');

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

// File: @openzeppelin/contracts/utils/introspection/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: contracts/interfaces/ERC1155TokenReceiver.sol



// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity >=0.7.0 <0.9.0;

/**
    Note: The ERC-165 identifier for this interface is 0x4e2312e0.
*/
interface ERC1155TokenReceiver {
    /**
        @notice Handle the receipt of a single ERC1155 token type.
        @dev An ERC1155-compliant smart contract MUST call this function on the token recipient contract, at the end of a `safeTransferFrom` after the balance has been updated.        
        This function MUST return `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))` (i.e. 0xf23a6e61) if it accepts the transfer.
        This function MUST revert if it rejects the transfer.
        Return of any other value than the prescribed keccak256 generated value MUST result in the transaction being reverted by the caller.
        @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)"))`
    */
    function onERC1155Received(
        address _operator,
        address _from,
        uint256 _id,
        uint256 _value,
        bytes calldata _data
    ) external returns (bytes4);

    /**
        @notice Handle the receipt of multiple ERC1155 token types.
        @dev An ERC1155-compliant smart contract MUST call this function on the token recipient contract, at the end of a `safeBatchTransferFrom` after the balances have been updated.        
        This function MUST return `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))` (i.e. 0xbc197c81) if it accepts the transfer(s).
        This function MUST revert if it rejects the transfer(s).
        Return of any other value than the prescribed keccak256 generated value MUST result in the transaction being reverted by the caller.
        @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)"))`
    */
    function onERC1155BatchReceived(
        address _operator,
        address _from,
        uint256[] calldata _ids,
        uint256[] calldata _values,
        bytes calldata _data
    ) external returns (bytes4);
}

// File: contracts/interfaces/ERC721TokenReceiver.sol



// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity >=0.7.0 <0.9.0;

/// @dev Note: the ERC-165 identifier for this interface is 0x150b7a02.
interface ERC721TokenReceiver {
    /// @notice Handle the receipt of an NFT
    /// @dev The ERC721 smart contract calls this function on the recipient
    ///  after a `transfer`. This function MAY throw to revert and reject the
    ///  transfer. Return of other than the magic value MUST result in the
    ///  transaction being reverted.
    ///  Note: the contract address is always the message sender.
    /// @param _operator The address which called `safeTransferFrom` function
    /// @param _from The address which previously owned the token
    /// @param _tokenId The NFT identifier which is being transferred
    /// @param _data Additional data with no specified format
    /// @return `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`
    ///  unless throwing
    function onERC721Received(
        address _operator,
        address _from,
        uint256 _tokenId,
        bytes calldata _data
    ) external returns (bytes4);
}

// File: @openzeppelin/contracts/utils/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: @openzeppelin/contracts/proxy/beacon/UpgradeableBeacon.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (proxy/beacon/UpgradeableBeacon.sol)

pragma solidity ^0.8.0;

import "./IBeacon.sol";
import "../../access/Ownable.sol";
import "../../utils/Address.sol";

/**
 * @dev This contract is used in conjunction with one or more instances of {BeaconProxy} to determine their
 * implementation contract, which is where they will delegate all function calls.
 *
 * An owner is able to change the implementation the beacon points to, thus upgrading the proxies that use this beacon.
 */
contract UpgradeableBeacon is IBeacon, Ownable {
    address private _implementation;

    /**
     * @dev Emitted when the implementation returned by the beacon is changed.
     */
    event Upgraded(address indexed implementation);

    /**
     * @dev Sets the address of the initial implementation, and the deployer account as the owner who can upgrade the
     * beacon.
     */
    constructor(address implementation_) {
        _setImplementation(implementation_);
    }

    /**
     * @dev Returns the current implementation address.
     */
    function implementation() public view virtual override returns (address) {
        return _implementation;
    }

    /**
     * @dev Upgrades the beacon to a new implementation.
     *
     * Emits an {Upgraded} event.
     *
     * Requirements:
     *
     * - msg.sender must be the owner of the contract.
     * - `newImplementation` must be a contract.
     */
    function upgradeTo(address newImplementation) public virtual onlyOwner {
        _setImplementation(newImplementation);
        emit Upgraded(newImplementation);
    }

    /**
     * @dev Sets the implementation contract address for this beacon
     *
     * Requirements:
     *
     * - `newImplementation` must be a contract.
     */
    function _setImplementation(address newImplementation) private {
        require(Address.isContract(newImplementation), "UpgradeableBeacon: implementation is not a contract");
        _implementation = newImplementation;
    }
}