// SPDX-License-Identifier: MIT

pragma solidity ^0.8.13;

struct TWalletApeInfo
{
    address     wallet;
    uint256     apeCoinBalance;
    uint256     theoricBoxCount;
    uint256     allowedBoxCount;
    uint256     claimedBoxCount;
}
//================================================================================
interface IERC20
{
    function balanceOf(address owner) external view returns(uint256 amount);
}
//================================================================================
interface IERC165
{
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
//================================================================================
interface IERC721 is IERC165
{
    event   Transfer(      address indexed from,  address indexed to,       uint256  indexed tokenId);
    event   Approval(      address indexed owner, address indexed approved, uint256  indexed tokenId);
    event   ApprovalForAll(address indexed owner, address indexed operator, bool             approved);

    function balanceOf(        address owner)                                   external view returns (uint256 balance);
    function ownerOf(          uint256 tokenId)                                 external view returns (address owner);
    function safeTransferFrom( address from,     address to, uint256 tokenId)   external;
    function transferFrom(     address from,     address to, uint256 tokenId)   external;
    function approve(          address to,       uint256 tokenId)               external;
    function getApproved(      uint256 tokenId)                                 external view returns (address operator);
    function setApprovalForAll(address operator, bool _approved)                external;
    function isApprovedForAll( address owner,    address operator)              external view returns (bool);
    function safeTransferFrom( address from,     address to, uint256 tokenId, bytes calldata data) external;
}
//================================================================================
interface IERC721Metadata is IERC721
{
    function name()                     external view returns (string memory);
    function symbol()                   external view returns (string memory);
    function tokenURI(uint256 tokenId)  external view returns (string memory);
}
//================================================================================
interface IERC721Enumerable is IERC721
{
    function totalSupply()                                      external view returns (uint256);
    function tokenOfOwnerByIndex(address owner, uint256 index)  external view returns (uint256 tokenId);
    function tokenByIndex(uint256 index)                        external view returns (uint256);
}
//================================================================================
interface IERC721Receiver
{
    function onERC721Received(address operator, address from, uint256 tokenId, bytes calldata data) external returns (bytes4);
}
//================================================================================
abstract contract ERC165 is IERC165
{
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool)
    {
        return (interfaceId == type(IERC165).interfaceId);
    }
}
//================================================================================
abstract contract Context
{
    function _msgSender() internal view virtual returns (address)
    {
        return msg.sender;
    }
   
   
    function _msgData() internal view virtual returns (bytes calldata)
    {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}
//================================================================================
abstract contract Ownable is Context
{
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

   
    constructor ()
    {
        address msgSender = _msgSender();
                   _owner = msgSender;
                   
        emit OwnershipTransferred(address(0), msgSender);
    }
   
   
    function owner() public view virtual returns (address)
    {
        return _owner;
    }
   
   
    modifier onlyOwner()
    {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
        _;
    }
   
   
    function renounceOwnership() public virtual onlyOwner
    {
        emit OwnershipTransferred(_owner, address(0));
       
        _owner = address(0);
    }
   
   
    function transferOwnership(address newOwner) public virtual onlyOwner
    {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
       
        emit OwnershipTransferred(_owner, newOwner);
       
        _owner = newOwner;
    }
}
//================================================================================
abstract contract ReentrancyGuard 
{
    uint256 private constant _NOT_ENTERED = 1;
    uint256 private constant _ENTERED     = 2;

    uint256 private _status;

    constructor() 
    {       
        _status = _NOT_ENTERED;
    }

    modifier nonReentrant()         // Prevents a contract from calling itself, directly or indirectly.
    {
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");    // On the first call to nonReentrant, _notEntered will be true
        _status = _ENTERED;                                                 // Any calls to nonReentrant after this point will fail
        _;
        _status = _NOT_ENTERED;                                             // By storing the original value once again, a refund is triggered (see // https://eips.ethereum.org/EIPS/eip-2200)
    }
}
//================================================================================
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata, Ownable, ReentrancyGuard
{
    using Address for address;
    using Strings for uint256;

    string private _name;   // Token name
    string private _symbol; // Token symbol

    mapping(uint256 => address)                  internal _owners;              // Mapping from token ID to owner address
    mapping(address => uint256)                  internal _balances;            // Mapping owner address to token count
    mapping(uint256 => address)                  private  _tokenApprovals;      // Mapping from token ID to approved address
    mapping(address => mapping(address => bool)) private  _operatorApprovals;   // Mapping from owner to operator approvals

   
    constructor(string memory name_, string memory symbol_)
    {
        _name   = name_;
        _symbol = symbol_;
    }
   
   
    function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool)
    {
        return  interfaceId == type(IERC721).interfaceId         ||
                interfaceId == type(IERC721Metadata).interfaceId ||
                super.supportsInterface(interfaceId);
    }
   
   
    function balanceOf(address owner) public view virtual override returns (uint256)
    {
        require(owner != address(0), "ERC721: balance query for the zero address");
       
        return _balances[owner];
    }
   
   
    function ownerOf(uint256 tokenId) public view virtual override returns (address)
    {
        address owner = _owners[tokenId];
        require(owner != address(0), "ERC721: owner query for nonexistent token");
        return owner;
    }
   
   
    function name() public view virtual override returns (string memory)
    {
        return _name;
    }
   
   
    function symbol() public view virtual override returns (string memory)
    {
        return _symbol;
    }
   
   
    function tokenURI(uint256 tokenId) public view virtual override returns (string memory)
    {
        require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");

        string memory baseURI = _baseURI();
       
        return (bytes(baseURI).length>0) ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
    }
   
   
    function _baseURI() internal view virtual returns (string memory)
    {
        return "";
    }
   
   
    function approve(address to, uint256 tokenId) public virtual override
    {
        address owner = ERC721.ownerOf(tokenId);
   
        require(to!=owner, "ERC721: approval to current owner");
        require(_msgSender()==owner || ERC721.isApprovedForAll(owner, _msgSender()), "ERC721: approve caller is not owner nor approved for all");

        _approve(to, tokenId);
    }
   
   
    function getApproved(uint256 tokenId) public view virtual override returns (address)
    {
        require(_exists(tokenId), "ERC721: approved query for nonexistent token");

        return _tokenApprovals[tokenId];
    }
   
   
    function setApprovalForAll(address operator, bool approved) public virtual override
    {
        require(operator != _msgSender(), "ERC721: approve to caller");

        _operatorApprovals[_msgSender()][operator] = approved;
   
        emit ApprovalForAll(_msgSender(), operator, approved);
    }
   
   
    function isApprovedForAll(address owner, address operator) public view virtual override returns (bool)
    {
        return _operatorApprovals[owner][operator];
    }
   
   
    function transferFrom(address from, address to, uint256 tokenId) public virtual override
    {
        //----- solhint-disable-next-line max-line-length
       
        require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");

        _transfer(from, to, tokenId);
    }
   
   
    function safeTransferFrom(address from, address to, uint256 tokenId) public virtual override
    {
        safeTransferFrom(from, to, tokenId, "");
    }
   
   
    function safeTransferFrom(address from, address to, uint256 tokenId, bytes memory _data) public virtual override
    {
        require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
       
        _safeTransfer(from, to, tokenId, _data);
    }
   
   
    function _safeTransfer(address from, address to, uint256 tokenId, bytes memory _data) internal virtual
    {
        _transfer(from, to, tokenId);
   
        require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
    }
   
   
    function _exists(uint256 tokenId) internal view virtual returns (bool)
    {
        return _owners[tokenId] != address(0);
    }
   
   
    function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool)
    {
        require(_exists(tokenId), "ERC721: operator query for nonexistent token");
       
        address owner = ERC721.ownerOf(tokenId);
       
        return (spender == owner || getApproved(tokenId) == spender || ERC721.isApprovedForAll(owner, spender));
    }
   
   
    function _safeMint(address to, uint256 tokenId) internal virtual
    {
        _safeMint(to, tokenId, "");
    }
   
   
    function _safeMint(address to, uint256 tokenId, bytes memory _data) internal virtual
    {
        _mint(to, tokenId);
   
        require(_checkOnERC721Received(address(0), to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
    }
   
   
    function _mint(address to, uint256 tokenId) internal virtual
    {
        require(to != address(0),  "ERC721: mint to the zero address");
        require(!_exists(tokenId), "ERC721: token already minted");

        _beforeTokenTransfer(address(0), to, tokenId);

        _balances[to]   += 1;
        _owners[tokenId] = to;

        emit Transfer(address(0), to, tokenId);
    }
   
   
    function _batchMint(address to, uint256[] memory tokenIds) internal virtual
    {
        require(to != address(0), "ERC721: mint to the zero address");
       
        _balances[to] += tokenIds.length;

        for (uint256 i=0; i < tokenIds.length; i++)
        {
            require(!_exists(tokenIds[i]), "ERC721: token already minted");

            _beforeTokenTransfer(address(0), to, tokenIds[i]);

            _owners[tokenIds[i]] = to;

            emit Transfer(address(0), to, tokenIds[i]);
        }
    }
   
   
    function _burn(uint256 tokenId) internal virtual
    {
        address owner = ERC721.ownerOf(tokenId);

        _beforeTokenTransfer(owner, address(0), tokenId);

        _approve(address(0), tokenId);      // Clear approvals

        _balances[owner] -= 1;

        delete _owners[tokenId];

        emit Transfer(owner, address(0), tokenId);
    }
   
   
    function _transfer(address from, address to, uint256 tokenId) internal virtual
    {
        require(ERC721.ownerOf(tokenId)==from,  "ERC721: transfer of token that is not own");
        require(to != address(0),               "ERC721: transfer to the zero address");

        _beforeTokenTransfer(from, to, tokenId);

        _approve(address(0), tokenId);      // Clear approvals from the previous owner

        _balances[from] -= 1;
        _balances[to]   += 1;
        _owners[tokenId] = to;

        emit Transfer(from, to, tokenId);
    }
   
   
    function _approve(address to, uint256 tokenId) internal virtual
    {
        _tokenApprovals[tokenId] = to;
   
        emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
    }
   
   
    function _checkOnERC721Received(address from,address to,uint256 tokenId,bytes memory _data) private returns (bool)
    {
        if (to.isContract())
        {
            try
           
                IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data)
           
            returns (bytes4 retval)
            {
                return retval == IERC721Receiver(to).onERC721Received.selector;
            }
            catch (bytes memory reason)
            {
                if (reason.length==0)
                {
                    revert("ERC721: transfer to non ERC721Receiver implementer");
                }
                else
                {
                    assembly { revert(add(32, reason), mload(reason)) }     //// solhint-disable-next-line no-inline-assembly
                }
            }
        }
        else
        {
            return true;
        }
    }
   
   
    function _beforeTokenTransfer(address from, address to, uint256 tokenId) internal virtual
    {
        //
    }
}
//================================================================================
abstract contract ERC721Enumerable is ERC721, IERC721Enumerable
{
    mapping(address => mapping(uint256 => uint256)) private _ownedTokens;           // Mapping from owner to list of owned token IDs
    mapping(uint256 => uint256)                     private _ownedTokensIndex;      // Mapping from token ID to index of the owner tokens list
    mapping(uint256 => uint256)                     private _allTokensIndex;        // Mapping from token id to position in the allTokens array

    uint256[] private _allTokens;                                                   // Array with all token ids, used for enumeration

    function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, ERC721) returns (bool)
    {
        return interfaceId == type(IERC721Enumerable).interfaceId || super.supportsInterface(interfaceId);
    }

    function totalSupply() public view virtual override returns (uint256)
    {
        return _allTokens.length;
    }

    function tokenOfOwnerByIndex(address owner, uint256 index) public view virtual override returns (uint256)
    {
        require(index < ERC721.balanceOf(owner), "ERC721Enumerable: owner index out of bounds");
   
        return _ownedTokens[owner][index];
    }

    function tokenByIndex(uint256 index) public view virtual override returns (uint256)
    {
        require(index < ERC721Enumerable.totalSupply(), "ERC721Enumerable: global index out of bounds");
   
        return _allTokens[index];
    }

    function _beforeTokenTransfer(address from,address to,uint256 tokenId) internal virtual override
    {
        super._beforeTokenTransfer(from, to, tokenId);

             if (from == address(0))     _addTokenToAllTokensEnumeration(tokenId);
        else if (from != to)             _removeTokenFromOwnerEnumeration(from, tokenId);
       
             if (to == address(0))       _removeTokenFromAllTokensEnumeration(tokenId);
        else if (to != from)             _addTokenToOwnerEnumeration(to, tokenId);
    }

    function _addTokenToOwnerEnumeration(address to, uint256 tokenId) private
    {
        uint256 length = ERC721.balanceOf(to);
   
        _ownedTokens[to][length]   = tokenId;
        _ownedTokensIndex[tokenId] = length;
    }

    function _addTokenToAllTokensEnumeration(uint256 tokenId) private
    {
        _allTokensIndex[tokenId] = _allTokens.length;
   
        _allTokens.push(tokenId);
    }

    function _removeTokenFromOwnerEnumeration(address from, uint256 tokenId) private
    {
        // To prevent a gap in from's tokens array, we store the last token in the index of the token to delete, and
        // then delete the last slot (swap and pop).

        uint256 lastTokenIndex = ERC721.balanceOf(from) - 1;
        uint256 tokenIndex = _ownedTokensIndex[tokenId];

        // When the token to delete is the last token, the swap operation is unnecessary
        if (tokenIndex != lastTokenIndex) {
            uint256 lastTokenId = _ownedTokens[from][lastTokenIndex];

            _ownedTokens[from][tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
            _ownedTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
        }

        // This also deletes the contents at the last position of the array
        delete _ownedTokensIndex[tokenId];
        delete _ownedTokens[from][lastTokenIndex];
    }

    function _removeTokenFromAllTokensEnumeration(uint256 tokenId) private
    {
        // To prevent a gap in the tokens array, we store the last token in the index of the token to delete, and
        // then delete the last slot (swap and pop).

        uint256 lastTokenIndex = _allTokens.length - 1;
        uint256 tokenIndex = _allTokensIndex[tokenId];

        // When the token to delete is the last token, the swap operation is unnecessary. However, since this occurs so
        // rarely (when the last minted token is burnt) that we still do the swap here to avoid the gas cost of adding
        // an 'if' statement (like in _removeTokenFromOwnerEnumeration)
        uint256 lastTokenId = _allTokens[lastTokenIndex];

        _allTokens[tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
        _allTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index

        // This also deletes the contents at the last position of the array
        delete _allTokensIndex[tokenId];
        _allTokens.pop();
    }
}
//================================================================================
library Strings
{
    bytes16 private constant alphabet = "0123456789abcdef";

   
    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);
    }
   
   
    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);
    }
   
   
    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] = alphabet[value & 0xf];
            value >>= 4;
        }
       
        require(value == 0, "Strings: hex length insufficient");
        return string(buffer);
    }
}
//================================================================================
library Address
{
    function isContract(address account) internal view returns (bool)
    {
        uint256 size;
       
        assembly { size := extcodesize(account) }   // solhint-disable-next-line no-inline-assembly
        return size > 0;
    }
   
   
    function sendValue(address payable recipient, uint256 amount) internal
    {
        require(address(this).balance >= amount, "Address: insufficient balance");

        (bool success, ) = recipient.call{ value: amount }(""); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value

        require(success, "Address: unable to send value, recipient may have reverted");
    }
   
   
    function functionCall(address target, bytes memory data) internal returns (bytes memory)
    {
        return functionCall(target, data, "Address: low-level call failed");
    }
   
   
    function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory)
    {
        return functionCallWithValue(target, data, 0, errorMessage);
    }
   
   
    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");
    }
   
   
    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);    // solhint-disable-next-line avoid-low-level-calls

        return _verifyCallResult(success, returndata, errorMessage);
    }
   
   
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory)
    {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }
   
   
    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);  // solhint-disable-next-line avoid-low-level-calls

        return _verifyCallResult(success, returndata, errorMessage);
    }
   
   
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory)
    {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }
   
   
    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);    // solhint-disable-next-line avoid-low-level-calls
       
        return _verifyCallResult(success, returndata, errorMessage);
    }
   
   
    function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory)
    {
        if (success)
        {
            return returndata;
        }
        else
        {
            if (returndata.length > 0)      // Look for revert reason and bubble it up if present
            {
                // The easiest way to bubble the revert reason is using memory via assembly
                // solhint-disable-next-line no-inline-assembly
                assembly
                {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            }
            else
            {
                revert(errorMessage);
            }
        }
    }
}
//==============================================================================
contract ApeUloanClaimer     is  ERC721Enumerable
{
    using Address for address;
    using Strings for uint256;

    modifier callerIsUser()    {  require(tx.origin == msg.sender, "The caller is another contract");  _;  }

    event   ClaimedNftsWithApeCoin(address wallet, uint256 boxCount);
    event   Reserved(address wallet, uint256 amount);

    uint256 private     totalTokens      = 1100;       // 1000+100 NFT to be created => 1000 Mysteryboxes + draws( email + twitter + discord ) 
    uint256 private     leftTokenCount   = totalTokens;
    uint256 private     mintedTokenCount = 0;

    mapping(address => uint256) private     totalClaimedBoxes;
    mapping(bytes32 => bool)    private     proposedHashes;

    string                      private     signHeader = "\x19Ethereum Signed Message:\n32";

    address                     private     admin = 0x738C30758b22bCe4EE64d4dd2dc9f0dcCd097229;

    string                      private     baseURI = '/';

    address                     private     ownerWallet;

    mapping(address => uint256) private     walletMintCounts;
    mapping(address => uint256) private     walletMintedTokenIds;
    
    mapping(uint256 => uint256) private     mintedTokenTimestamps;

    constructor() ERC721("ULoanMysteryBoxxx", "ULMBOXXX")   // temporary Symbol and title
    {
        ownerWallet = msg.sender;
    }
    //------------------------------------------------------------------------
    function    isERC721ReceivedCheck(address from,address to,uint256 tokenId,bytes memory _data) private returns (bool)
    {
        if (to.isContract())
        {
            try
               
                IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data)
               
            returns (bytes4 retval)
            {
                return retval == IERC721Receiver(to).onERC721Received.selector;
            }
            catch (bytes memory reason)
            {
                if (reason.length==0)
                {
                    revert("ERC721: transfer to non ERC721Receiver implementer");
                }
                else
                {
                    assembly { revert(add(32, reason), mload(reason)) }     //// solhint-disable-next-line no-inline-assembly
                }
            }
        }
        else
        {
            return true;
        }
    }
    //------------------------------------------------------------------------
    function    setBaseTokenURI(string memory newUri) external onlyOwner
    {
        baseURI = newUri;
    }
    //------------------------------------------------------------------------
    function    addAvailableTokens(uint256 extraAmount) external onlyOwner
    {
        totalTokens    += extraAmount;
        leftTokenCount += extraAmount;
    }
    //------------------------------------------------------------------------
    function    subAvailableTokens(uint256 subAmount) external onlyOwner
    {
        require(subAmount < totalTokens,    "Invalid subAmount for totalTokens");
        require(subAmount < leftTokenCount, "Invalid subAmount for leftTokenCount");

        totalTokens    -= subAmount;
        leftTokenCount -= subAmount;
    }
    //------------------------------------------------------------------------
    function    baseTokenURI() external view returns (string memory)
    {
        return baseURI;
    }
    //------------------------------------------------------------------------
    function    getAvailableTokens() external view returns (uint256)
    {
        return leftTokenCount;
    }
    //------------------------------------------------------------------------
    function    _baseURI() internal view virtual override returns (string memory)
    {
        return baseURI;
    }
    //------------------------------------------------------------------------
    function    getTokenIdsByWallet(address walletAddress) external view returns(uint256[] memory)
    {
        require(walletAddress!=address(0), "BlackHole wallet is not a real owner");
       
        uint256          count  = balanceOf(walletAddress);
        uint256[] memory result = new uint256[](count);
       
        for (uint256 i=0; i<count; i++)
        {
            result[i] = tokenOfOwnerByIndex(walletAddress, i);
        }
       
        return result;
    }
    //---------------------------------------------------------------------------
    function    claim(uint boxCount,   bytes32 proposedHash, uint8 v, bytes32 r, bytes32 s)
            external
            callerIsUser
            nonReentrant
    {
                //----- signed function checker

        bool isProposedHashedUsed = proposedHashes[proposedHash];

        require(isProposedHashedUsed==false, "This hash was already used");

        proposedHashes[proposedHash] = true;

        bytes32 messageDigest = keccak256(abi.encodePacked(signHeader, proposedHash));
        address caller        = ecrecover(messageDigest, v, r, s);
        bool    isFromAdmin   = (caller==admin);

        require(isFromAdmin==true, "Unallowed call");

        require(boxCount<=5, "Too many boxes asked");

                //-----

        require(leftTokenCount > 0, "No more MysteryBox available");

        uint256 claimedBoxCount = totalClaimedBoxes[ msg.sender ] ;

        require(claimedBoxCount==0, "Wallet already claimed!");

                //-----

        uint256 nMinted=0;

        for (uint i; i<boxCount; i++)
        {
            walletMintCounts[msg.sender]++;
            mintedTokenCount++;
            leftTokenCount--;
        
            _safeMint(msg.sender, mintedTokenCount);

            nMinted++;

            if (leftTokenCount==0)          break;              // No more Mysteryboxes to share  
        }

        totalClaimedBoxes[msg.sender] = boxCount;               // Already recived boxes, don't allow again

        emit ClaimedNftsWithApeCoin(msg.sender, boxCount);
    }
    //---------------------------------------------------------------------------
    function    getClaimedBoxCount(address wallet) external view returns(uint256 claimedBoxCount)
    {
        return totalClaimedBoxes[ wallet ];
    }
    //---------------------------------------------------------------------------
    function    reserve(uint256 amount)  external onlyOwner
    {
        require(amount         <= 200,    "Reserve is limited to 200 per call at max");
        require(leftTokenCount >= amount, "Not enough tokens left to reserve anymore");

        walletMintCounts[msg.sender] += amount;

        for (uint256 i=0; i < amount; i++)
        {
            mintedTokenCount++;
           
            mintedTokenTimestamps[mintedTokenCount] = block.timestamp;
            
            _safeMint(msg.sender, mintedTokenCount);
        }

        leftTokenCount = totalTokens - mintedTokenCount;

        emit Reserved(msg.sender, amount);
    }
    //---------------------------------------------------------------------------
    function    massSend(address[] memory recipients, uint256[] memory tokenIds) external 
    {
        uint256 l1 = recipients.length;
        uint256 l2 = tokenIds.length;

        require(l1==l2, "recipients count doesn't match tokens");

        for (uint i; i<l1; i++)
        {
            address to = recipients[i];

            if (to==address(0x0))       continue;
            if (to==msg.sender)         continue;

            uint256 tokenId = tokenIds[i];

            transferFrom(msg.sender, to, tokenId);
        }
    }
    //---------------------------------------------------------------------------
    //---------------------------------------------------------------------------
}