Epic Pangolin Squad

// SPDX-License-Identifier: MIT








pragma solidity ^0.8.0;


interface IERC165 {
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}




// File: @openzeppelin/contracts/interfaces/IERC2981.sol




// OpenZeppelin Contracts (last updated v4.6.0) (interfaces/IERC2981.sol)


pragma solidity ^0.8.0;




/**
 * @dev Interface for the NFT Royalty Standard.
 *
 * A standardized way to retrieve royalty payment information for non-fungible tokens (NFTs) to enable universal
 * support for royalty payments across all NFT marketplaces and ecosystem participants.
 *
 * _Available since v4.5._
 */


interface IERC2981 is IERC165 {
    /**
     * @dev Returns how much royalty is owed and to whom, based on a sale price that may be denominated in any unit of
     * exchange. The royalty amount is denominated and should be paid in that same unit of exchange.
     */
    function royaltyInfo(uint256 tokenId, uint256 salePrice)
        external
        view
        returns (address receiver, uint256 royaltyAmount);
}






pragma solidity ^0.8.0;


interface IERC721Receiver {
    function onERC721Received(
        address operator,
        address from,
        uint256 tokenId,
        bytes calldata data
    ) external returns (bytes4);
}


pragma solidity ^0.8.0;


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;
}


pragma solidity ^0.8.0;


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);
}


pragma solidity ^0.8.0;


interface IERC721Enumerable is IERC721 {
    function totalSupply() external view returns (uint256);


    function tokenOfOwnerByIndex(address owner, uint256 index)
        external
        view
        returns (uint256);


    function tokenByIndex(uint256 index) external view returns (uint256);
}


pragma solidity ^0.8.1;


library Address {
    function isContract(address account) internal view returns (bool) {
        return account.code.length > 0;
    }


    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"
        );
    }


    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
        );
        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);
        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);
        return verifyCallResult(success, returndata, errorMessage);
    }


    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            if (returndata.length > 0) {
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}


// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
pragma solidity ^0.8.0;


abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }


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


pragma solidity ^0.8.0;


abstract contract Ownable is Context {
    address private _owner;


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


    constructor() {
        _setOwner(_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 {
        _setOwner(address(0));
    }


    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(
            newOwner != address(0),
            "Ownable: new owner is the zero address"
        );
        _setOwner(newOwner);
    }


    function _setOwner(address newOwner) private {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}


// OpenZeppelin Contracts v4.4.1 (utils/Strings.sol)
pragma solidity ^0.8.0;


library Strings {
    bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";


    function toString(uint256 value) internal pure returns (string memory) {
        // 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] = _HEX_SYMBOLS[value & 0xf];
            value >>= 4;
        }
        require(value == 0, "Strings: hex length insufficient");
        return string(buffer);
    }
}


// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)
pragma solidity ^0.8.0;


abstract contract ERC165 is IERC165 {
    function supportsInterface(bytes4 interfaceId)
        public
        view
        virtual
        override
        returns (bool)
    {
        return interfaceId == type(IERC165).interfaceId;
    }
}


pragma solidity ^0.8.0;


abstract contract ReentrancyGuard {
    // word because each write operation emits an extra SLOAD to first read the
    // back. This is the compiler's defense against contract upgrades and


    // but in exchange the refund on every call to nonReentrant will be lower in
    // transaction's gas, it is best to keep them low in cases like this one, to
    uint256 private constant _NOT_ENTERED = 1;
    uint256 private constant _ENTERED = 2;


    uint256 private _status;


    constructor() {
        _status = _NOT_ENTERED;
    }


    modifier nonReentrant() {
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
        _status = _ENTERED;


        _;
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = _NOT_ENTERED;
    }
}


// File: @openzeppelin/contracts/token/common/ERC2981.sol




// OpenZeppelin Contracts (last updated v4.7.0) (token/common/ERC2981.sol)


pragma solidity ^0.8.0;






/**
 * @dev Implementation of the NFT Royalty Standard, a standardized way to retrieve royalty payment information.
 *
 * Royalty information can be specified globally for all token ids via {_setDefaultRoyalty}, and/or individually for
 * specific token ids via {_setTokenRoyalty}. The latter takes precedence over the first.
 *
 * Royalty is specified as a fraction of sale price. {_feeDenominator} is overridable but defaults to 10000, meaning the
 * fee is specified in basis points by default.
 *
 * IMPORTANT: ERC-2981 only specifies a way to signal royalty information and does not enforce its payment. See
 * https://eips.ethereum.org/EIPS/eip-2981#optional-royalty-payments[Rationale] in the EIP. Marketplaces are expected to
 * voluntarily pay royalties together with sales, but note that this standard is not yet widely supported.
 *
 * _Available since v4.5._
 */
abstract contract ERC2981 is IERC2981, ERC165 {
    struct RoyaltyInfo {
        address receiver;
        uint96 royaltyFraction;
    }


    RoyaltyInfo private _defaultRoyaltyInfo;
    mapping(uint256 => RoyaltyInfo) private _tokenRoyaltyInfo;


    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, ERC165) returns (bool) {
        return interfaceId == type(IERC2981).interfaceId || super.supportsInterface(interfaceId);
    }


    /**
     * @inheritdoc IERC2981
     */
    function royaltyInfo(uint256 _tokenId, uint256 _salePrice) public view virtual override returns (address, uint256) {
        RoyaltyInfo memory royalty = _tokenRoyaltyInfo[_tokenId];


        if (royalty.receiver == address(0)) {
            royalty = _defaultRoyaltyInfo;
        }


        uint256 royaltyAmount = (_salePrice * royalty.royaltyFraction) / _feeDenominator();


        return (royalty.receiver, royaltyAmount);
    }


    /**
     * @dev The denominator with which to interpret the fee set in {_setTokenRoyalty} and {_setDefaultRoyalty} as a
     * fraction of the sale price. Defaults to 10000 so fees are expressed in basis points, but may be customized by an
     * override.
     */
    function _feeDenominator() internal pure virtual returns (uint96) {
        return 10000;
    }


    /**
     * @dev Sets the royalty information that all ids in this contract will default to.
     *
     * Requirements:
     *
     * - `receiver` cannot be the zero address.
     * - `feeNumerator` cannot be greater than the fee denominator.
     */
    function _setDefaultRoyalty(address receiver, uint96 feeNumerator) internal virtual {
        require(feeNumerator <= _feeDenominator(), "ERC2981: royalty fee will exceed salePrice");
        require(receiver != address(0), "ERC2981: invalid receiver");


        _defaultRoyaltyInfo = RoyaltyInfo(receiver, feeNumerator);
    }


    /**
     * @dev Removes default royalty information.
     */
    function _deleteDefaultRoyalty() internal virtual {
        delete _defaultRoyaltyInfo;
    }


    /**
     * @dev Sets the royalty information for a specific token id, overriding the global default.
     *
     * Requirements:
     *
     * - `receiver` cannot be the zero address.
     * - `feeNumerator` cannot be greater than the fee denominator.
     */
    function _setTokenRoyalty(
        uint256 tokenId,
        address receiver,
        uint96 feeNumerator
    ) internal virtual {
        require(feeNumerator <= _feeDenominator(), "ERC2981: royalty fee will exceed salePrice");
        require(receiver != address(0), "ERC2981: Invalid parameters");


        _tokenRoyaltyInfo[tokenId] = RoyaltyInfo(receiver, feeNumerator);
    }


    /**
     * @dev Resets royalty information for the token id back to the global default.
     */
    function _resetTokenRoyalty(uint256 tokenId) internal virtual {
        delete _tokenRoyaltyInfo[tokenId];
    }
}


pragma solidity ^0.8.0;


contract ERC721A is
    Context,
    ERC165,
    IERC721,
    IERC721Metadata,
    IERC721Enumerable
{
    using Address for address;
    using Strings for uint256;


    struct TokenOwnership {
        address addr;
        uint64 startTimestamp;
    }


    struct AddressData {
        uint128 balance;
        uint128 numberMinted;
    }


    uint256 private currentIndex = 0;


    uint256 internal immutable collectionSize;
    uint256 internal immutable maxBatchSize;
    string private _name;
    string private _symbol;
    // An empty struct value does not necessarily mean the token is unowned. See ownershipOf implementation for details.
    mapping(uint256 => TokenOwnership) private _ownerships;
    mapping(address => AddressData) private _addressData;
    mapping(uint256 => address) private _tokenApprovals;
    mapping(address => mapping(address => bool)) private _operatorApprovals;


    constructor(
        string memory name_,
        string memory symbol_,
        uint256 maxBatchSize_,
        uint256 collectionSize_
    ) {
        require(
            collectionSize_ > 0,
            "ERC721A: collection must have a nonzero supply"
        );
        require(maxBatchSize_ > 0, "ERC721A: max batch size must be nonzero");
        _name = name_;
        _symbol = symbol_;
        maxBatchSize = maxBatchSize_;
        collectionSize = collectionSize_;
    }


    function totalSupply() public view override returns (uint256) {
        return currentIndex;
    }


    function tokenByIndex(uint256 index)
        public
        view
        override
        returns (uint256)
    {
        require(index < totalSupply(), "ERC721A: global index out of bounds");
        return index;
    }


    function tokenOfOwnerByIndex(address owner, uint256 index)
        public
        view
        override
        returns (uint256)
    {
        require(index < balanceOf(owner), "ERC721A: owner index out of bounds");
        uint256 numMintedSoFar = totalSupply();
        uint256 tokenIdsIdx = 0;
        address currOwnershipAddr = address(0);
        for (uint256 i = 0; i < numMintedSoFar; i++) {
            TokenOwnership memory ownership = _ownerships[i];
            if (ownership.addr != address(0)) {
                currOwnershipAddr = ownership.addr;
            }
            if (currOwnershipAddr == owner) {
                if (tokenIdsIdx == index) {
                    return i;
                }
                tokenIdsIdx++;
            }
        }
        revert("ERC721A: unable to get token of owner by index");
    }


    function supportsInterface(bytes4 interfaceId)
        public
        view
        virtual
        override(ERC165, IERC165)
        returns (bool)
    {
        return
            interfaceId == type(IERC721).interfaceId ||
            interfaceId == type(IERC721Metadata).interfaceId ||
            interfaceId == type(IERC721Enumerable).interfaceId ||
            super.supportsInterface(interfaceId);
    }


    function balanceOf(address owner) public view override returns (uint256) {
        require(
            owner != address(0),
            "ERC721A: balance query for the zero address"
        );
        return uint256(_addressData[owner].balance);
    }


    function _numberMinted(address owner) internal view returns (uint256) {
        require(
            owner != address(0),
            "ERC721A: number minted query for the zero address"
        );
        return uint256(_addressData[owner].numberMinted);
    }


    function ownershipOf(uint256 tokenId)
        internal
        view
        returns (TokenOwnership memory)
    {
        require(_exists(tokenId), "ERC721A: owner query for nonexistent token");


        uint256 lowestTokenToCheck;
        if (tokenId >= maxBatchSize) {
            lowestTokenToCheck = tokenId - maxBatchSize + 1;
        }


        for (uint256 curr = tokenId; curr >= lowestTokenToCheck; curr--) {
            TokenOwnership memory ownership = _ownerships[curr];
            if (ownership.addr != address(0)) {
                return ownership;
            }
        }


        revert("ERC721A: unable to determine the owner of token");
    }


    function ownerOf(uint256 tokenId) public view override returns (address) {
        return ownershipOf(tokenId).addr;
    }


    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 override {
        address owner = ERC721A.ownerOf(tokenId);
        require(to != owner, "ERC721A: approval to current owner");


        require(
            _msgSender() == owner || isApprovedForAll(owner, _msgSender()),
            "ERC721A: approve caller is not owner nor approved for all"
        );


        _approve(to, tokenId, owner);
    }


    function getApproved(uint256 tokenId)
        public
        view
        override
        returns (address)
    {
        require(
            _exists(tokenId),
            "ERC721A: approved query for nonexistent token"
        );


        return _tokenApprovals[tokenId];
    }


    function setApprovalForAll(address operator, bool approved)
        public
        override
    {
        require(operator != _msgSender(), "ERC721A: 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 override {
        _transfer(from, to, tokenId);
    }


    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId
    ) public override {
        safeTransferFrom(from, to, tokenId, "");
    }


    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId,
        bytes memory _data
    ) public override {
        _transfer(from, to, tokenId);
        require(
            _checkOnERC721Received(from, to, tokenId, _data),
            "ERC721A: transfer to non ERC721Receiver implementer"
        );
    }


    function _exists(uint256 tokenId) internal view returns (bool) {
        return tokenId < currentIndex;
    }


    function _safeMint(address to, uint256 quantity) internal {
        _safeMint(to, quantity, "");
    }


    function _safeMint(
        address to,
        uint256 quantity,
        bytes memory _data
    ) internal {
        uint256 startTokenId = currentIndex;
        require(to != address(0), "ERC721A: mint to the zero address");
        require(!_exists(startTokenId), "ERC721A: token already minted");
        require(quantity <= maxBatchSize, "ERC721A: quantity to mint too high");


        _beforeTokenTransfers(address(0), to, startTokenId, quantity);


        AddressData memory addressData = _addressData[to];
        _addressData[to] = AddressData(
            addressData.balance + uint128(quantity),
            addressData.numberMinted + uint128(quantity)
        );
        _ownerships[startTokenId] = TokenOwnership(to, uint64(block.timestamp));


        uint256 updatedIndex = startTokenId;


        for (uint256 i = 0; i < quantity; i++) {
            emit Transfer(address(0), to, updatedIndex);
            require(
                _checkOnERC721Received(address(0), to, updatedIndex, _data),
                "ERC721A: transfer to non ERC721Receiver implementer"
            );
            updatedIndex++;
        }


        currentIndex = updatedIndex;
        _afterTokenTransfers(address(0), to, startTokenId, quantity);
    }


    function _transfer(
        address from,
        address to,
        uint256 tokenId
    ) private {
        TokenOwnership memory prevOwnership = ownershipOf(tokenId);


        bool isApprovedOrOwner = (_msgSender() == prevOwnership.addr ||
            getApproved(tokenId) == _msgSender() ||
            isApprovedForAll(prevOwnership.addr, _msgSender()));


        require(
            isApprovedOrOwner,
            "ERC721A: transfer caller is not owner nor approved"
        );


        require(
            prevOwnership.addr == from,
            "ERC721A: transfer from incorrect owner"
        );
        require(to != address(0), "ERC721A: transfer to the zero address");


        _beforeTokenTransfers(from, to, tokenId, 1);
        _approve(address(0), tokenId, prevOwnership.addr);


        _addressData[from].balance -= 1;
        _addressData[to].balance += 1;
        _ownerships[tokenId] = TokenOwnership(to, uint64(block.timestamp));
        // Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls.
        uint256 nextTokenId = tokenId + 1;
        if (_ownerships[nextTokenId].addr == address(0)) {
            if (_exists(nextTokenId)) {
                _ownerships[nextTokenId] = TokenOwnership(
                    prevOwnership.addr,
                    prevOwnership.startTimestamp
                );
            }
        }


        emit Transfer(from, to, tokenId);
        _afterTokenTransfers(from, to, tokenId, 1);
    }


    function _approve(
        address to,
        uint256 tokenId,
        address owner
    ) private {
        _tokenApprovals[tokenId] = to;
        emit Approval(owner, to, tokenId);
    }


    uint256 public nextOwnerToExplicitlySet = 0;


    function _setOwnersExplicit(uint256 quantity) internal {
        uint256 oldNextOwnerToSet = nextOwnerToExplicitlySet;
        require(quantity > 0, "quantity must be nonzero");
        uint256 endIndex = oldNextOwnerToSet + quantity - 1;
        if (endIndex > collectionSize - 1) {
            endIndex = collectionSize - 1;
        }
        require(_exists(endIndex), "not enough minted yet for this cleanup");
        for (uint256 i = oldNextOwnerToSet; i <= endIndex; i++) {
            if (_ownerships[i].addr == address(0)) {
                TokenOwnership memory ownership = ownershipOf(i);
                _ownerships[i] = TokenOwnership(
                    ownership.addr,
                    ownership.startTimestamp
                );
            }
        }
        nextOwnerToExplicitlySet = endIndex + 1;
    }


    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(
                        "ERC721A: transfer to non ERC721Receiver implementer"
                    );
                } else {
                    assembly {
                        revert(add(32, reason), mload(reason))
                    }
                }
            }
        } else {
            return true;
        }
    }


    function _beforeTokenTransfers(
        address from,
        address to,
        uint256 startTokenId,
        uint256 quantity
    ) internal virtual {}


    function _afterTokenTransfers(
        address from,
        address to,
        uint256 startTokenId,
        uint256 quantity
    ) internal virtual {}
}


contract Epicpangolinsquad is Ownable, ERC721A, ERC2981, ReentrancyGuard {
    using Strings for uint256;
    address public ElephantContract;


    string public uriPrefix = "";


    string public uriSuffix = ".json";
    string public hiddenMetadataUri;


    uint256 public cost = 0.01 ether;
    uint256 public maxSupply = 2000;
    uint256 public maxMintAmountPerTx = 20;


    bool public publicMint = true; // By default public minting is paused
    bool public publicClaim = true; // By default claim pangolin NFTs is paused
    bool public revealed = false; //  By default NFTs is in hidden state


    mapping(uint256 => bool) public claimedepicpangolin;


    constructor(address payable royaltiesReceiver, address _contract) ERC721A("Epic Pangolin Squad", "EPS", 2000, maxSupply) {
        ElephantContract = _contract; // Epic Elephant Squad Contract Address
        setRoyaltyInfo(royaltiesReceiver, 1000);
    }


    modifier mintCompliance(uint256 _mintAmount) {
        require(
            _mintAmount > 0 && _mintAmount <= maxMintAmountPerTx,
            "Invalid mint amount!"
        );
        require(
            totalSupply() + _mintAmount <= maxSupply,
            "Max supply exceeded!"
        );
        _;
    }


    function mint(uint256 _mintAmount)
        public
        payable
        mintCompliance(_mintAmount)
    {
        require(!publicMint, "The contract is paused!");
        require(msg.value >= cost * _mintAmount, "Insufficient funds!");
        _safeMint(msg.sender, _mintAmount);
    }


    function claimepicpangolin()
        public
    {
        require(!publicClaim, "The contract is paused!");
        uint256 elephantsOwned = IERC721(ElephantContract).balanceOf(msg.sender);
        require(elephantsOwned > 0, "No Elephants owned!");


        uint256 claimAmount = 0;
        uint256 lastClaimableToken = 0;
        for (uint256 i = 0; i < elephantsOwned; i++) {
            uint256 tokenId = IERC721Enumerable(ElephantContract).tokenOfOwnerByIndex(msg.sender, i);
            if (!claimedepicpangolin[tokenId]) {
                claimAmount++;
                claimedepicpangolin[tokenId] = true;
                lastClaimableToken = tokenId;
            }
        }


        if (claimAmount % 1 == 1) {
            claimAmount--;
            delete claimedepicpangolin[lastClaimableToken];
        }


        require(claimAmount > 0, "No reedemable Pangolins!");
        _safeMint(msg.sender, claimAmount / 1);
    }


    function claimableElephantsCount(address _owner)
        public
        view
        returns (uint256)
    {
        uint256 elephantsOwned = IERC721(ElephantContract).balanceOf(_owner);


        uint256 claimAmount = 0;
        uint256 lastClaimableToken = 0;
        for (uint256 i = 0; i < elephantsOwned; i++) {
            uint256 tokenId = IERC721Enumerable(ElephantContract).tokenOfOwnerByIndex(_owner, i);
            if (!claimedepicpangolin[tokenId]) {
                claimAmount++;
                lastClaimableToken = tokenId;
            }
        }


        if (claimAmount % 1 == 1) {
            claimAmount--;
        }


        return (claimAmount / 1);
    }


    function getOwnershipData(uint256 tokenId)
        external
        view
        returns (TokenOwnership memory)
    {
        return ownershipOf(tokenId);
    }


    function mintForAddress(address _address, uint256 quantity)
        external
        onlyOwner
    {
        require(
            totalSupply() + quantity <= maxSupply,
            "NOT_ENOUGH_SUPPLY_TO_GIVEAWAY_DESIRED_AMOUNT"
        );
        _safeMint(_address, quantity);
    }


    function walletOfOwner(address _owner)
        public
        view
        returns (uint256[] memory)
    {
        uint256 ownerTokenCount = balanceOf(_owner);
        uint256[] memory ownedTokenIds = new uint256[](ownerTokenCount);
        uint256 currentTokenId = 1;
        uint256 ownedTokenIndex = 0;


        while (
            ownedTokenIndex < ownerTokenCount && currentTokenId <= maxSupply
        ) {
            address currentTokenOwner = ownerOf(currentTokenId);


            if (currentTokenOwner == _owner) {
                ownedTokenIds[ownedTokenIndex] = currentTokenId;


                ownedTokenIndex++;
            }


            currentTokenId++;
        }


        return ownedTokenIds;
    }


    function tokenURI(uint256 _tokenId)
        public
        view
        virtual
        override
        returns (string memory)
    {
        require(
            _exists(_tokenId),
            "ERC721Metadata: URI query for nonexistent token"
        );


        if (revealed == false) {
            return hiddenMetadataUri;
        }


        string memory currentBaseURI = _baseURI();
        return
            bytes(currentBaseURI).length > 0
                ? string(
                    abi.encodePacked(
                        currentBaseURI,
                        _tokenId.toString(),
                        uriSuffix
                    )
                )
                : "";
    }


    function setRevealed() public onlyOwner {
        revealed = !revealed;
    }


    function setCost(uint256 _cost) public onlyOwner {
        cost = _cost;
    }


    function setMaxMintAmountPerTx(uint256 _maxMintAmountPerTx)
        public
        onlyOwner
    {
        maxMintAmountPerTx = _maxMintAmountPerTx;
    }


    function setHiddenMetadataUri(string memory _hiddenMetadataUri)
        public
        onlyOwner
    {
        hiddenMetadataUri = _hiddenMetadataUri;
    }


    function setUriPrefix(string memory _uriPrefix) public onlyOwner {
        uriPrefix = _uriPrefix;
    }


    function setUriSuffix(string memory _uriSuffix) public onlyOwner {
        uriSuffix = _uriSuffix;
    }


    function setPublicMint() public onlyOwner {
        publicMint = !publicMint;
    }


    function setPublicClaim() public onlyOwner {
        publicClaim = !publicClaim;
    }


    function setElephantContract(address _address) public onlyOwner {
        ElephantContract = _address;
    }


    function _baseURI() internal view virtual override returns (string memory) {
        return uriPrefix;
    }


    function withdraw() external onlyOwner {
        payable(msg.sender).transfer(address(this).balance);
    }
   
    // IERC2981


    function setRoyaltyInfo(address payable receiver, uint96 numerator) public onlyOwner {
        _setDefaultRoyalty(receiver, numerator);
    }
    //
    function supportsInterface(bytes4 interfaceId) public view virtual override(ERC721A, ERC2981) returns (bool) {
        return ERC721A.supportsInterface(interfaceId) || ERC2981.supportsInterface(interfaceId);
    }
}

{
  "compilationTarget": {
    "Epicpangolinsquad.sol": "Epicpangolinsquad"
  },
  "evmVersion": "cancun",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "remappings": []
}