// File: @openzeppelin/contracts/interfaces/draft-IERC6093.sol


// OpenZeppelin Contracts (last updated v5.0.0) (interfaces/draft-IERC6093.sol)
pragma solidity ^0.8.20;

/**
 * @dev Standard ERC20 Errors
 * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC20 tokens.
 */
interface IERC20Errors {
    /**
     * @dev Indicates an error related to the current `balance` of a `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     * @param balance Current balance for the interacting account.
     * @param needed Minimum amount required to perform a transfer.
     */
    error ERC20InsufficientBalance(address sender, uint256 balance, uint256 needed);

    /**
     * @dev Indicates a failure with the token `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     */
    error ERC20InvalidSender(address sender);

    /**
     * @dev Indicates a failure with the token `receiver`. Used in transfers.
     * @param receiver Address to which tokens are being transferred.
     */
    error ERC20InvalidReceiver(address receiver);

    /**
     * @dev Indicates a failure with the `spender`’s `allowance`. Used in transfers.
     * @param spender Address that may be allowed to operate on tokens without being their owner.
     * @param allowance Amount of tokens a `spender` is allowed to operate with.
     * @param needed Minimum amount required to perform a transfer.
     */
    error ERC20InsufficientAllowance(address spender, uint256 allowance, uint256 needed);

    /**
     * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.
     * @param approver Address initiating an approval operation.
     */
    error ERC20InvalidApprover(address approver);

    /**
     * @dev Indicates a failure with the `spender` to be approved. Used in approvals.
     * @param spender Address that may be allowed to operate on tokens without being their owner.
     */
    error ERC20InvalidSpender(address spender);
}

/**
 * @dev Standard ERC721 Errors
 * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC721 tokens.
 */
interface IERC721Errors {
    /**
     * @dev Indicates that an address can't be an owner. For example, `address(0)` is a forbidden owner in EIP-20.
     * Used in balance queries.
     * @param owner Address of the current owner of a token.
     */
    error ERC721InvalidOwner(address owner);

    /**
     * @dev Indicates a `tokenId` whose `owner` is the zero address.
     * @param tokenId Identifier number of a token.
     */
    error ERC721NonexistentToken(uint256 tokenId);

    /**
     * @dev Indicates an error related to the ownership over a particular token. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     * @param tokenId Identifier number of a token.
     * @param owner Address of the current owner of a token.
     */
    error ERC721IncorrectOwner(address sender, uint256 tokenId, address owner);

    /**
     * @dev Indicates a failure with the token `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     */
    error ERC721InvalidSender(address sender);

    /**
     * @dev Indicates a failure with the token `receiver`. Used in transfers.
     * @param receiver Address to which tokens are being transferred.
     */
    error ERC721InvalidReceiver(address receiver);

    /**
     * @dev Indicates a failure with the `operator`’s approval. Used in transfers.
     * @param operator Address that may be allowed to operate on tokens without being their owner.
     * @param tokenId Identifier number of a token.
     */
    error ERC721InsufficientApproval(address operator, uint256 tokenId);

    /**
     * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.
     * @param approver Address initiating an approval operation.
     */
    error ERC721InvalidApprover(address approver);

    /**
     * @dev Indicates a failure with the `operator` to be approved. Used in approvals.
     * @param operator Address that may be allowed to operate on tokens without being their owner.
     */
    error ERC721InvalidOperator(address operator);
}

/**
 * @dev Standard ERC1155 Errors
 * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC1155 tokens.
 */
interface IERC1155Errors {
    /**
     * @dev Indicates an error related to the current `balance` of a `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     * @param balance Current balance for the interacting account.
     * @param needed Minimum amount required to perform a transfer.
     * @param tokenId Identifier number of a token.
     */
    error ERC1155InsufficientBalance(address sender, uint256 balance, uint256 needed, uint256 tokenId);

    /**
     * @dev Indicates a failure with the token `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     */
    error ERC1155InvalidSender(address sender);

    /**
     * @dev Indicates a failure with the token `receiver`. Used in transfers.
     * @param receiver Address to which tokens are being transferred.
     */
    error ERC1155InvalidReceiver(address receiver);

    /**
     * @dev Indicates a failure with the `operator`’s approval. Used in transfers.
     * @param operator Address that may be allowed to operate on tokens without being their owner.
     * @param owner Address of the current owner of a token.
     */
    error ERC1155MissingApprovalForAll(address operator, address owner);

    /**
     * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.
     * @param approver Address initiating an approval operation.
     */
    error ERC1155InvalidApprover(address approver);

    /**
     * @dev Indicates a failure with the `operator` to be approved. Used in approvals.
     * @param operator Address that may be allowed to operate on tokens without being their owner.
     */
    error ERC1155InvalidOperator(address operator);

    /**
     * @dev Indicates an array length mismatch between ids and values in a safeBatchTransferFrom operation.
     * Used in batch transfers.
     * @param idsLength Length of the array of token identifiers
     * @param valuesLength Length of the array of token amounts
     */
    error ERC1155InvalidArrayLength(uint256 idsLength, uint256 valuesLength);
}

// File: @openzeppelin/contracts/utils/math/SignedMath.sol


// OpenZeppelin Contracts (last updated v5.0.0) (utils/math/SignedMath.sol)

pragma solidity ^0.8.20;

/**
 * @dev Standard signed math utilities missing in the Solidity language.
 */
library SignedMath {
    /**
     * @dev Returns the largest of two signed numbers.
     */
    function max(int256 a, int256 b) internal pure returns (int256) {
        return a > b ? a : b;
    }

    /**
     * @dev Returns the smallest of two signed numbers.
     */
    function min(int256 a, int256 b) internal pure returns (int256) {
        return a < b ? a : b;
    }

    /**
     * @dev Returns the average of two signed numbers without overflow.
     * The result is rounded towards zero.
     */
    function average(int256 a, int256 b) internal pure returns (int256) {
        // Formula from the book "Hacker's Delight"
        int256 x = (a & b) + ((a ^ b) >> 1);
        return x + (int256(uint256(x) >> 255) & (a ^ b));
    }

    /**
     * @dev Returns the absolute unsigned value of a signed value.
     */
    function abs(int256 n) internal pure returns (uint256) {
        unchecked {
            // must be unchecked in order to support `n = type(int256).min`
            return uint256(n >= 0 ? n : -n);
        }
    }
}

// File: @openzeppelin/contracts/utils/math/Math.sol


// OpenZeppelin Contracts (last updated v5.0.0) (utils/math/Math.sol)

pragma solidity ^0.8.20;

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library Math {
    /**
     * @dev Muldiv operation overflow.
     */
    error MathOverflowedMulDiv();

    enum Rounding {
        Floor, // Toward negative infinity
        Ceil, // Toward positive infinity
        Trunc, // Toward zero
        Expand // Away from zero
    }

    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            uint256 c = a + b;
            if (c < a) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, with an overflow flag.
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b > a) return (false, 0);
            return (true, a - b);
        }
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
            // benefit is lost if 'b' is also tested.
            // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
            if (a == 0) return (true, 0);
            uint256 c = a * b;
            if (c / a != b) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a / b);
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a % b);
        }
    }

    /**
     * @dev Returns the largest of two numbers.
     */
    function max(uint256 a, uint256 b) internal pure returns (uint256) {
        return a > b ? a : b;
    }

    /**
     * @dev Returns the smallest of two numbers.
     */
    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        return a < b ? a : b;
    }

    /**
     * @dev Returns the average of two numbers. The result is rounded towards
     * zero.
     */
    function average(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b) / 2 can overflow.
        return (a & b) + (a ^ b) / 2;
    }

    /**
     * @dev Returns the ceiling of the division of two numbers.
     *
     * This differs from standard division with `/` in that it rounds towards infinity instead
     * of rounding towards zero.
     */
    function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
        if (b == 0) {
            // Guarantee the same behavior as in a regular Solidity division.
            return a / b;
        }

        // (a + b - 1) / b can overflow on addition, so we distribute.
        return a == 0 ? 0 : (a - 1) / b + 1;
    }

    /**
     * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or
     * denominator == 0.
     * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv) with further edits by
     * Uniswap Labs also under MIT license.
     */
    function mulDiv(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result) {
        unchecked {
            // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use
            // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256
            // variables such that product = prod1 * 2^256 + prod0.
            uint256 prod0 = x * y; // Least significant 256 bits of the product
            uint256 prod1; // Most significant 256 bits of the product
            assembly {
                let mm := mulmod(x, y, not(0))
                prod1 := sub(sub(mm, prod0), lt(mm, prod0))
            }

            // Handle non-overflow cases, 256 by 256 division.
            if (prod1 == 0) {
                // Solidity will revert if denominator == 0, unlike the div opcode on its own.
                // The surrounding unchecked block does not change this fact.
                // See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic.
                return prod0 / denominator;
            }

            // Make sure the result is less than 2^256. Also prevents denominator == 0.
            if (denominator <= prod1) {
                revert MathOverflowedMulDiv();
            }

            ///////////////////////////////////////////////
            // 512 by 256 division.
            ///////////////////////////////////////////////

            // Make division exact by subtracting the remainder from [prod1 prod0].
            uint256 remainder;
            assembly {
                // Compute remainder using mulmod.
                remainder := mulmod(x, y, denominator)

                // Subtract 256 bit number from 512 bit number.
                prod1 := sub(prod1, gt(remainder, prod0))
                prod0 := sub(prod0, remainder)
            }

            // Factor powers of two out of denominator and compute largest power of two divisor of denominator.
            // Always >= 1. See https://cs.stackexchange.com/q/138556/92363.

            uint256 twos = denominator & (0 - denominator);
            assembly {
                // Divide denominator by twos.
                denominator := div(denominator, twos)

                // Divide [prod1 prod0] by twos.
                prod0 := div(prod0, twos)

                // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one.
                twos := add(div(sub(0, twos), twos), 1)
            }

            // Shift in bits from prod1 into prod0.
            prod0 |= prod1 * twos;

            // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such
            // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for
            // four bits. That is, denominator * inv = 1 mod 2^4.
            uint256 inverse = (3 * denominator) ^ 2;

            // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also
            // works in modular arithmetic, doubling the correct bits in each step.
            inverse *= 2 - denominator * inverse; // inverse mod 2^8
            inverse *= 2 - denominator * inverse; // inverse mod 2^16
            inverse *= 2 - denominator * inverse; // inverse mod 2^32
            inverse *= 2 - denominator * inverse; // inverse mod 2^64
            inverse *= 2 - denominator * inverse; // inverse mod 2^128
            inverse *= 2 - denominator * inverse; // inverse mod 2^256

            // Because the division is now exact we can divide by multiplying with the modular inverse of denominator.
            // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is
            // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1
            // is no longer required.
            result = prod0 * inverse;
            return result;
        }
    }

    /**
     * @notice Calculates x * y / denominator with full precision, following the selected rounding direction.
     */
    function mulDiv(uint256 x, uint256 y, uint256 denominator, Rounding rounding) internal pure returns (uint256) {
        uint256 result = mulDiv(x, y, denominator);
        if (unsignedRoundsUp(rounding) && mulmod(x, y, denominator) > 0) {
            result += 1;
        }
        return result;
    }

    /**
     * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded
     * towards zero.
     *
     * Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11).
     */
    function sqrt(uint256 a) internal pure returns (uint256) {
        if (a == 0) {
            return 0;
        }

        // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.
        //
        // We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have
        // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`.
        //
        // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)`
        // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))`
        // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)`
        //
        // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit.
        uint256 result = 1 << (log2(a) >> 1);

        // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128,
        // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at
        // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision
        // into the expected uint128 result.
        unchecked {
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            return min(result, a / result);
        }
    }

    /**
     * @notice Calculates sqrt(a), following the selected rounding direction.
     */
    function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = sqrt(a);
            return result + (unsignedRoundsUp(rounding) && result * result < a ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 2 of a positive value rounded towards zero.
     * Returns 0 if given 0.
     */
    function log2(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 128;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 64;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 32;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 16;
            }
            if (value >> 8 > 0) {
                value >>= 8;
                result += 8;
            }
            if (value >> 4 > 0) {
                value >>= 4;
                result += 4;
            }
            if (value >> 2 > 0) {
                value >>= 2;
                result += 2;
            }
            if (value >> 1 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 2, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log2(value);
            return result + (unsignedRoundsUp(rounding) && 1 << result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 10 of a positive value rounded towards zero.
     * Returns 0 if given 0.
     */
    function log10(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >= 10 ** 64) {
                value /= 10 ** 64;
                result += 64;
            }
            if (value >= 10 ** 32) {
                value /= 10 ** 32;
                result += 32;
            }
            if (value >= 10 ** 16) {
                value /= 10 ** 16;
                result += 16;
            }
            if (value >= 10 ** 8) {
                value /= 10 ** 8;
                result += 8;
            }
            if (value >= 10 ** 4) {
                value /= 10 ** 4;
                result += 4;
            }
            if (value >= 10 ** 2) {
                value /= 10 ** 2;
                result += 2;
            }
            if (value >= 10 ** 1) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 10, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log10(value);
            return result + (unsignedRoundsUp(rounding) && 10 ** result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 256 of a positive value rounded towards zero.
     * Returns 0 if given 0.
     *
     * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.
     */
    function log256(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 16;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 8;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 4;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 2;
            }
            if (value >> 8 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 256, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log256(value);
            return result + (unsignedRoundsUp(rounding) && 1 << (result << 3) < value ? 1 : 0);
        }
    }

    /**
     * @dev Returns whether a provided rounding mode is considered rounding up for unsigned integers.
     */
    function unsignedRoundsUp(Rounding rounding) internal pure returns (bool) {
        return uint8(rounding) % 2 == 1;
    }
}

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


// OpenZeppelin Contracts (last updated v5.0.0) (utils/Strings.sol)

pragma solidity ^0.8.20;



/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant HEX_DIGITS = "0123456789abcdef";
    uint8 private constant ADDRESS_LENGTH = 20;

    /**
     * @dev The `value` string doesn't fit in the specified `length`.
     */
    error StringsInsufficientHexLength(uint256 value, uint256 length);

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        unchecked {
            uint256 length = Math.log10(value) + 1;
            string memory buffer = new string(length);
            uint256 ptr;
            /// @solidity memory-safe-assembly
            assembly {
                ptr := add(buffer, add(32, length))
            }
            while (true) {
                ptr--;
                /// @solidity memory-safe-assembly
                assembly {
                    mstore8(ptr, byte(mod(value, 10), HEX_DIGITS))
                }
                value /= 10;
                if (value == 0) break;
            }
            return buffer;
        }
    }

    /**
     * @dev Converts a `int256` to its ASCII `string` decimal representation.
     */
    function toStringSigned(int256 value) internal pure returns (string memory) {
        return string.concat(value < 0 ? "-" : "", toString(SignedMath.abs(value)));
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        unchecked {
            return toHexString(value, Math.log256(value) + 1);
        }
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
     */
    function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
        uint256 localValue = value;
        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_DIGITS[localValue & 0xf];
            localValue >>= 4;
        }
        if (localValue != 0) {
            revert StringsInsufficientHexLength(value, length);
        }
        return string(buffer);
    }

    /**
     * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal
     * representation.
     */
    function toHexString(address addr) internal pure returns (string memory) {
        return toHexString(uint256(uint160(addr)), ADDRESS_LENGTH);
    }

    /**
     * @dev Returns true if the two strings are equal.
     */
    function equal(string memory a, string memory b) internal pure returns (bool) {
        return bytes(a).length == bytes(b).length && keccak256(bytes(a)) == keccak256(bytes(b));
    }
}

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


// OpenZeppelin Contracts (last updated v5.0.0) (access/IAccessControl.sol)

pragma solidity ^0.8.20;

/**
 * @dev External interface of AccessControl declared to support ERC165 detection.
 */
interface IAccessControl {
    /**
     * @dev The `account` is missing a role.
     */
    error AccessControlUnauthorizedAccount(address account, bytes32 neededRole);

    /**
     * @dev The caller of a function is not the expected one.
     *
     * NOTE: Don't confuse with {AccessControlUnauthorizedAccount}.
     */
    error AccessControlBadConfirmation();

    /**
     * @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
     *
     * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
     * {RoleAdminChanged} not being emitted signaling this.
     */
    event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);

    /**
     * @dev Emitted when `account` is granted `role`.
     *
     * `sender` is the account that originated the contract call, an admin role
     * bearer except when using {AccessControl-_setupRole}.
     */
    event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);

    /**
     * @dev Emitted when `account` is revoked `role`.
     *
     * `sender` is the account that originated the contract call:
     *   - if using `revokeRole`, it is the admin role bearer
     *   - if using `renounceRole`, it is the role bearer (i.e. `account`)
     */
    event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);

    /**
     * @dev Returns `true` if `account` has been granted `role`.
     */
    function hasRole(bytes32 role, address account) external view returns (bool);

    /**
     * @dev Returns the admin role that controls `role`. See {grantRole} and
     * {revokeRole}.
     *
     * To change a role's admin, use {AccessControl-_setRoleAdmin}.
     */
    function getRoleAdmin(bytes32 role) external view returns (bytes32);

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     */
    function grantRole(bytes32 role, address account) external;

    /**
     * @dev Revokes `role` from `account`.
     *
     * If `account` had been granted `role`, emits a {RoleRevoked} event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     */
    function revokeRole(bytes32 role, address account) external;

    /**
     * @dev Revokes `role` from the calling account.
     *
     * Roles are often managed via {grantRole} and {revokeRole}: this function's
     * purpose is to provide a mechanism for accounts to lose their privileges
     * if they are compromised (such as when a trusted device is misplaced).
     *
     * If the calling account had been granted `role`, emits a {RoleRevoked}
     * event.
     *
     * Requirements:
     *
     * - the caller must be `callerConfirmation`.
     */
    function renounceRole(bytes32 role, address callerConfirmation) external;
}

// File: @openzeppelin/contracts/utils/introspection/IERC165.sol


// OpenZeppelin Contracts (last updated v5.0.0) (utils/introspection/IERC165.sol)

pragma solidity ^0.8.20;

/**
 * @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: @openzeppelin/contracts/utils/introspection/ERC165.sol


// OpenZeppelin Contracts (last updated v5.0.0) (utils/introspection/ERC165.sol)

pragma solidity ^0.8.20;


/**
 * @dev Implementation of the {IERC165} interface.
 *
 * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
 * for the additional interface id that will be supported. For example:
 *
 * ```solidity
 * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
 *     return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
 * }
 * ```
 */
abstract contract ERC165 is IERC165 {
    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual returns (bool) {
        return interfaceId == type(IERC165).interfaceId;
    }
}

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


// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC721/IERC721.sol)

pragma solidity ^0.8.20;


/**
 * @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`.
     *
     * 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;

    /**
     * @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 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: Note that the caller is responsible to confirm that the recipient is capable of receiving ERC721
     * or else they may be permanently lost. Usage of {safeTransferFrom} prevents loss, though the caller must
     * understand this adds an external call which potentially creates a reentrancy vulnerability.
     *
     * 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 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 address zero.
     *
     * Emits an {ApprovalForAll} event.
     */
    function setApprovalForAll(address operator, bool approved) external;

    /**
     * @dev Returns the account approved for `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function getApproved(uint256 tokenId) external view returns (address operator);

    /**
     * @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);
}

// File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol


// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC721/extensions/IERC721Enumerable.sol)

pragma solidity ^0.8.20;


/**
 * @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
 * @dev See https://eips.ethereum.org/EIPS/eip-721
 */
interface IERC721Enumerable is IERC721 {
    /**
     * @dev Returns the total amount of tokens stored by the contract.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns a token ID owned by `owner` at a given `index` of its token list.
     * Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
     */
    function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256);

    /**
     * @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
     * Use along with {totalSupply} to enumerate all tokens.
     */
    function tokenByIndex(uint256 index) external view returns (uint256);
}

// File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol


// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC721/extensions/IERC721Metadata.sol)

pragma solidity ^0.8.20;


/**
 * @title ERC-721 Non-Fungible Token Standard, optional metadata extension
 * @dev See https://eips.ethereum.org/EIPS/eip-721
 */
interface IERC721Metadata is IERC721 {
    /**
     * @dev Returns the token collection name.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the token collection symbol.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
     */
    function tokenURI(uint256 tokenId) external view returns (string memory);
}

// File: @openzeppelin/contracts/token/ERC721/IERC721Receiver.sol


// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC721/IERC721Receiver.sol)

pragma solidity ^0.8.20;

/**
 * @title ERC721 token receiver interface
 * @dev Interface for any contract that wants to support safeTransfers
 * from ERC721 asset contracts.
 */
interface IERC721Receiver {
    /**
     * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
     * by `operator` from `from`, this function is called.
     *
     * It must return its Solidity selector to confirm the token transfer.
     * If any other value is returned or the interface is not implemented by the recipient, the transfer will be
     * reverted.
     *
     * The selector can be obtained in Solidity with `IERC721Receiver.onERC721Received.selector`.
     */
    function onERC721Received(
        address operator,
        address from,
        uint256 tokenId,
        bytes calldata data
    ) external returns (bytes4);
}

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


// OpenZeppelin Contracts (last updated v5.0.1) (utils/Context.sol)

pragma solidity ^0.8.20;

/**
 * @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;
    }

    function _contextSuffixLength() internal view virtual returns (uint256) {
        return 0;
    }
}

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


// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC721/ERC721.sol)

pragma solidity ^0.8.20;








/**
 * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
 * the Metadata extension, but not including the Enumerable extension, which is available separately as
 * {ERC721Enumerable}.
 */
abstract contract ERC721 is Context, ERC165, IERC721, IERC721Metadata, IERC721Errors {
    using Strings for uint256;

    // Token name
    string private _name;

    // Token symbol
    string private _symbol;

    mapping(uint256 tokenId => address) private _owners;

    mapping(address owner => uint256) private _balances;

    mapping(uint256 tokenId => address) private _tokenApprovals;

    mapping(address owner => mapping(address operator => bool)) private _operatorApprovals;

    /**
     * @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
     */
    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
        return
            interfaceId == type(IERC721).interfaceId ||
            interfaceId == type(IERC721Metadata).interfaceId ||
            super.supportsInterface(interfaceId);
    }

    /**
     * @dev See {IERC721-balanceOf}.
     */
    function balanceOf(address owner) public view virtual returns (uint256) {
        if (owner == address(0)) {
            revert ERC721InvalidOwner(address(0));
        }
        return _balances[owner];
    }

    /**
     * @dev See {IERC721-ownerOf}.
     */
    function ownerOf(uint256 tokenId) public view virtual returns (address) {
        return _requireOwned(tokenId);
    }

    /**
     * @dev See {IERC721Metadata-name}.
     */
    function name() public view virtual returns (string memory) {
        return _name;
    }

    /**
     * @dev See {IERC721Metadata-symbol}.
     */
    function symbol() public view virtual returns (string memory) {
        return _symbol;
    }

    /**
     * @dev See {IERC721Metadata-tokenURI}.
     */
    function tokenURI(uint256 tokenId) public view virtual returns (string memory) {
        _requireOwned(tokenId);

        string memory baseURI = _baseURI();
        return bytes(baseURI).length > 0 ? string.concat(baseURI, tokenId.toString()) : "";
    }

    /**
     * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
     * token will be the concatenation of the `baseURI` and the `tokenId`. Empty
     * by default, can be overridden in child contracts.
     */
    function _baseURI() internal view virtual returns (string memory) {
        return "";
    }

    /**
     * @dev See {IERC721-approve}.
     */
    function approve(address to, uint256 tokenId) public virtual {
        _approve(to, tokenId, _msgSender());
    }

    /**
     * @dev See {IERC721-getApproved}.
     */
    function getApproved(uint256 tokenId) public view virtual returns (address) {
        _requireOwned(tokenId);

        return _getApproved(tokenId);
    }

    /**
     * @dev See {IERC721-setApprovalForAll}.
     */
    function setApprovalForAll(address operator, bool approved) public virtual {
        _setApprovalForAll(_msgSender(), operator, approved);
    }

    /**
     * @dev See {IERC721-isApprovedForAll}.
     */
    function isApprovedForAll(address owner, address operator) public view virtual returns (bool) {
        return _operatorApprovals[owner][operator];
    }

    /**
     * @dev See {IERC721-transferFrom}.
     */
    function transferFrom(address from, address to, uint256 tokenId) public virtual {
        if (to == address(0)) {
            revert ERC721InvalidReceiver(address(0));
        }
        // Setting an "auth" arguments enables the `_isAuthorized` check which verifies that the token exists
        // (from != 0). Therefore, it is not needed to verify that the return value is not 0 here.
        address previousOwner = _update(to, tokenId, _msgSender());
        if (previousOwner != from) {
            revert ERC721IncorrectOwner(from, tokenId, previousOwner);
        }
    }

    /**
     * @dev See {IERC721-safeTransferFrom}.
     */
    function safeTransferFrom(address from, address to, uint256 tokenId) public {
        safeTransferFrom(from, to, tokenId, "");
    }

    /**
     * @dev See {IERC721-safeTransferFrom}.
     */
    function safeTransferFrom(address from, address to, uint256 tokenId, bytes memory data) public virtual {
        transferFrom(from, to, tokenId);
        _checkOnERC721Received(from, to, tokenId, data);
    }

    /**
     * @dev Returns the owner of the `tokenId`. Does NOT revert if token doesn't exist
     *
     * IMPORTANT: Any overrides to this function that add ownership of tokens not tracked by the
     * core ERC721 logic MUST be matched with the use of {_increaseBalance} to keep balances
     * consistent with ownership. The invariant to preserve is that for any address `a` the value returned by
     * `balanceOf(a)` must be equal to the number of tokens such that `_ownerOf(tokenId)` is `a`.
     */
    function _ownerOf(uint256 tokenId) internal view virtual returns (address) {
        return _owners[tokenId];
    }

    /**
     * @dev Returns the approved address for `tokenId`. Returns 0 if `tokenId` is not minted.
     */
    function _getApproved(uint256 tokenId) internal view virtual returns (address) {
        return _tokenApprovals[tokenId];
    }

    /**
     * @dev Returns whether `spender` is allowed to manage `owner`'s tokens, or `tokenId` in
     * particular (ignoring whether it is owned by `owner`).
     *
     * WARNING: This function assumes that `owner` is the actual owner of `tokenId` and does not verify this
     * assumption.
     */
    function _isAuthorized(address owner, address spender, uint256 tokenId) internal view virtual returns (bool) {
        return
            spender != address(0) &&
            (owner == spender || isApprovedForAll(owner, spender) || _getApproved(tokenId) == spender);
    }

    /**
     * @dev Checks if `spender` can operate on `tokenId`, assuming the provided `owner` is the actual owner.
     * Reverts if `spender` does not have approval from the provided `owner` for the given token or for all its assets
     * the `spender` for the specific `tokenId`.
     *
     * WARNING: This function assumes that `owner` is the actual owner of `tokenId` and does not verify this
     * assumption.
     */
    function _checkAuthorized(address owner, address spender, uint256 tokenId) internal view virtual {
        if (!_isAuthorized(owner, spender, tokenId)) {
            if (owner == address(0)) {
                revert ERC721NonexistentToken(tokenId);
            } else {
                revert ERC721InsufficientApproval(spender, tokenId);
            }
        }
    }

    /**
     * @dev Unsafe write access to the balances, used by extensions that "mint" tokens using an {ownerOf} override.
     *
     * NOTE: the value is limited to type(uint128).max. This protect against _balance overflow. It is unrealistic that
     * a uint256 would ever overflow from increments when these increments are bounded to uint128 values.
     *
     * WARNING: Increasing an account's balance using this function tends to be paired with an override of the
     * {_ownerOf} function to resolve the ownership of the corresponding tokens so that balances and ownership
     * remain consistent with one another.
     */
    function _increaseBalance(address account, uint128 value) internal virtual {
        unchecked {
            _balances[account] += value;
        }
    }

    /**
     * @dev Transfers `tokenId` from its current owner to `to`, or alternatively mints (or burns) if the current owner
     * (or `to`) is the zero address. Returns the owner of the `tokenId` before the update.
     *
     * The `auth` argument is optional. If the value passed is non 0, then this function will check that
     * `auth` is either the owner of the token, or approved to operate on the token (by the owner).
     *
     * Emits a {Transfer} event.
     *
     * NOTE: If overriding this function in a way that tracks balances, see also {_increaseBalance}.
     */
    function _update(address to, uint256 tokenId, address auth) internal virtual returns (address) {
        address from = _ownerOf(tokenId);

        // Perform (optional) operator check
        if (auth != address(0)) {
            _checkAuthorized(from, auth, tokenId);
        }

        // Execute the update
        if (from != address(0)) {
            // Clear approval. No need to re-authorize or emit the Approval event
            _approve(address(0), tokenId, address(0), false);

            unchecked {
                _balances[from] -= 1;
            }
        }

        if (to != address(0)) {
            unchecked {
                _balances[to] += 1;
            }
        }

        _owners[tokenId] = to;

        emit Transfer(from, to, tokenId);

        return from;
    }

    /**
     * @dev Mints `tokenId` and transfers it to `to`.
     *
     * WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
     *
     * Requirements:
     *
     * - `tokenId` must not exist.
     * - `to` cannot be the zero address.
     *
     * Emits a {Transfer} event.
     */
    function _mint(address to, uint256 tokenId) internal {
        if (to == address(0)) {
            revert ERC721InvalidReceiver(address(0));
        }
        address previousOwner = _update(to, tokenId, address(0));
        if (previousOwner != address(0)) {
            revert ERC721InvalidSender(address(0));
        }
    }

    /**
     * @dev Mints `tokenId`, transfers it to `to` and checks for `to` acceptance.
     *
     * Requirements:
     *
     * - `tokenId` must not exist.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function _safeMint(address to, uint256 tokenId) internal {
        _safeMint(to, tokenId, "");
    }

    /**
     * @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
     * forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
     */
    function _safeMint(address to, uint256 tokenId, bytes memory data) internal virtual {
        _mint(to, tokenId);
        _checkOnERC721Received(address(0), to, tokenId, data);
    }

    /**
     * @dev Destroys `tokenId`.
     * The approval is cleared when the token is burned.
     * This is an internal function that does not check if the sender is authorized to operate on the token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     *
     * Emits a {Transfer} event.
     */
    function _burn(uint256 tokenId) internal {
        address previousOwner = _update(address(0), tokenId, address(0));
        if (previousOwner == address(0)) {
            revert ERC721NonexistentToken(tokenId);
        }
    }

    /**
     * @dev Transfers `tokenId` from `from` to `to`.
     *  As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     *
     * Emits a {Transfer} event.
     */
    function _transfer(address from, address to, uint256 tokenId) internal {
        if (to == address(0)) {
            revert ERC721InvalidReceiver(address(0));
        }
        address previousOwner = _update(to, tokenId, address(0));
        if (previousOwner == address(0)) {
            revert ERC721NonexistentToken(tokenId);
        } else if (previousOwner != from) {
            revert ERC721IncorrectOwner(from, tokenId, previousOwner);
        }
    }

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`, checking that contract recipients
     * are aware of the ERC721 standard to prevent tokens from being forever locked.
     *
     * `data` is additional data, it has no specified format and it is sent in call to `to`.
     *
     * This internal function is like {safeTransferFrom} in the sense that it invokes
     * {IERC721Receiver-onERC721Received} on the receiver, and can be used to e.g.
     * implement alternative mechanisms to perform token transfer, such as signature-based.
     *
     * Requirements:
     *
     * - `tokenId` token must exist and be owned by `from`.
     * - `to` cannot be the zero address.
     * - `from` cannot be the zero address.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function _safeTransfer(address from, address to, uint256 tokenId) internal {
        _safeTransfer(from, to, tokenId, "");
    }

    /**
     * @dev Same as {xref-ERC721-_safeTransfer-address-address-uint256-}[`_safeTransfer`], with an additional `data` parameter which is
     * forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
     */
    function _safeTransfer(address from, address to, uint256 tokenId, bytes memory data) internal virtual {
        _transfer(from, to, tokenId);
        _checkOnERC721Received(from, to, tokenId, data);
    }

    /**
     * @dev Approve `to` to operate on `tokenId`
     *
     * The `auth` argument is optional. If the value passed is non 0, then this function will check that `auth` is
     * either the owner of the token, or approved to operate on all tokens held by this owner.
     *
     * Emits an {Approval} event.
     *
     * Overrides to this logic should be done to the variant with an additional `bool emitEvent` argument.
     */
    function _approve(address to, uint256 tokenId, address auth) internal {
        _approve(to, tokenId, auth, true);
    }

    /**
     * @dev Variant of `_approve` with an optional flag to enable or disable the {Approval} event. The event is not
     * emitted in the context of transfers.
     */
    function _approve(address to, uint256 tokenId, address auth, bool emitEvent) internal virtual {
        // Avoid reading the owner unless necessary
        if (emitEvent || auth != address(0)) {
            address owner = _requireOwned(tokenId);

            // We do not use _isAuthorized because single-token approvals should not be able to call approve
            if (auth != address(0) && owner != auth && !isApprovedForAll(owner, auth)) {
                revert ERC721InvalidApprover(auth);
            }

            if (emitEvent) {
                emit Approval(owner, to, tokenId);
            }
        }

        _tokenApprovals[tokenId] = to;
    }

    /**
     * @dev Approve `operator` to operate on all of `owner` tokens
     *
     * Requirements:
     * - operator can't be the address zero.
     *
     * Emits an {ApprovalForAll} event.
     */
    function _setApprovalForAll(address owner, address operator, bool approved) internal virtual {
        if (operator == address(0)) {
            revert ERC721InvalidOperator(operator);
        }
        _operatorApprovals[owner][operator] = approved;
        emit ApprovalForAll(owner, operator, approved);
    }

    /**
     * @dev Reverts if the `tokenId` doesn't have a current owner (it hasn't been minted, or it has been burned).
     * Returns the owner.
     *
     * Overrides to ownership logic should be done to {_ownerOf}.
     */
    function _requireOwned(uint256 tokenId) internal view returns (address) {
        address owner = _ownerOf(tokenId);
        if (owner == address(0)) {
            revert ERC721NonexistentToken(tokenId);
        }
        return owner;
    }

    /**
     * @dev Private function to invoke {IERC721Receiver-onERC721Received} on a target address. This will revert if the
     * recipient doesn't accept the token transfer. The call is not executed if the target address is not a contract.
     *
     * @param from address representing the previous owner of the given token ID
     * @param to target address that will receive the tokens
     * @param tokenId uint256 ID of the token to be transferred
     * @param data bytes optional data to send along with the call
     */
    function _checkOnERC721Received(address from, address to, uint256 tokenId, bytes memory data) private {
        if (to.code.length > 0) {
            try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, data) returns (bytes4 retval) {
                if (retval != IERC721Receiver.onERC721Received.selector) {
                    revert ERC721InvalidReceiver(to);
                }
            } catch (bytes memory reason) {
                if (reason.length == 0) {
                    revert ERC721InvalidReceiver(to);
                } else {
                    /// @solidity memory-safe-assembly
                    assembly {
                        revert(add(32, reason), mload(reason))
                    }
                }
            }
        }
    }
}

// File: @openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol


// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC721/extensions/ERC721Enumerable.sol)

pragma solidity ^0.8.20;




/**
 * @dev This implements an optional extension of {ERC721} defined in the EIP that adds enumerability
 * of all the token ids in the contract as well as all token ids owned by each account.
 *
 * CAUTION: `ERC721` extensions that implement custom `balanceOf` logic, such as `ERC721Consecutive`,
 * interfere with enumerability and should not be used together with `ERC721Enumerable`.
 */
abstract contract ERC721Enumerable is ERC721, IERC721Enumerable {
    mapping(address owner => mapping(uint256 index => uint256)) private _ownedTokens;
    mapping(uint256 tokenId => uint256) private _ownedTokensIndex;

    uint256[] private _allTokens;
    mapping(uint256 tokenId => uint256) private _allTokensIndex;

    /**
     * @dev An `owner`'s token query was out of bounds for `index`.
     *
     * NOTE: The owner being `address(0)` indicates a global out of bounds index.
     */
    error ERC721OutOfBoundsIndex(address owner, uint256 index);

    /**
     * @dev Batch mint is not allowed.
     */
    error ERC721EnumerableForbiddenBatchMint();

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, ERC721) returns (bool) {
        return interfaceId == type(IERC721Enumerable).interfaceId || super.supportsInterface(interfaceId);
    }

    /**
     * @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
     */
    function tokenOfOwnerByIndex(address owner, uint256 index) public view virtual returns (uint256) {
        if (index >= balanceOf(owner)) {
            revert ERC721OutOfBoundsIndex(owner, index);
        }
        return _ownedTokens[owner][index];
    }

    /**
     * @dev See {IERC721Enumerable-totalSupply}.
     */
    function totalSupply() public view virtual returns (uint256) {
        return _allTokens.length;
    }

    /**
     * @dev See {IERC721Enumerable-tokenByIndex}.
     */
    function tokenByIndex(uint256 index) public view virtual returns (uint256) {
        if (index >= totalSupply()) {
            revert ERC721OutOfBoundsIndex(address(0), index);
        }
        return _allTokens[index];
    }

    /**
     * @dev See {ERC721-_update}.
     */
    function _update(address to, uint256 tokenId, address auth) internal virtual override returns (address) {
        address previousOwner = super._update(to, tokenId, auth);

        if (previousOwner == address(0)) {
            _addTokenToAllTokensEnumeration(tokenId);
        } else if (previousOwner != to) {
            _removeTokenFromOwnerEnumeration(previousOwner, tokenId);
        }
        if (to == address(0)) {
            _removeTokenFromAllTokensEnumeration(tokenId);
        } else if (previousOwner != to) {
            _addTokenToOwnerEnumeration(to, tokenId);
        }

        return previousOwner;
    }

    /**
     * @dev Private function to add a token to this extension's ownership-tracking data structures.
     * @param to address representing the new owner of the given token ID
     * @param tokenId uint256 ID of the token to be added to the tokens list of the given address
     */
    function _addTokenToOwnerEnumeration(address to, uint256 tokenId) private {
        uint256 length = balanceOf(to) - 1;
        _ownedTokens[to][length] = tokenId;
        _ownedTokensIndex[tokenId] = length;
    }

    /**
     * @dev Private function to add a token to this extension's token tracking data structures.
     * @param tokenId uint256 ID of the token to be added to the tokens list
     */
    function _addTokenToAllTokensEnumeration(uint256 tokenId) private {
        _allTokensIndex[tokenId] = _allTokens.length;
        _allTokens.push(tokenId);
    }

    /**
     * @dev Private function to remove a token from this extension's ownership-tracking data structures. Note that
     * while the token is not assigned a new owner, the `_ownedTokensIndex` mapping is _not_ updated: this allows for
     * gas optimizations e.g. when performing a transfer operation (avoiding double writes).
     * This has O(1) time complexity, but alters the order of the _ownedTokens array.
     * @param from address representing the previous owner of the given token ID
     * @param tokenId uint256 ID of the token to be removed from the tokens list of the given address
     */
    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 = balanceOf(from);
        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];
    }

    /**
     * @dev Private function to remove a token from this extension's token tracking data structures.
     * This has O(1) time complexity, but alters the order of the _allTokens array.
     * @param tokenId uint256 ID of the token to be removed from the tokens list
     */
    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();
    }

    /**
     * See {ERC721-_increaseBalance}. We need that to account tokens that were minted in batch
     */
    function _increaseBalance(address account, uint128 amount) internal virtual override {
        if (amount > 0) {
            revert ERC721EnumerableForbiddenBatchMint();
        }
        super._increaseBalance(account, amount);
    }
}

// File: @openzeppelin/contracts/token/ERC721/extensions/ERC721Burnable.sol


// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC721/extensions/ERC721Burnable.sol)

pragma solidity ^0.8.20;



/**
 * @title ERC721 Burnable Token
 * @dev ERC721 Token that can be burned (destroyed).
 */
abstract contract ERC721Burnable is Context, ERC721 {
    /**
     * @dev Burns `tokenId`. See {ERC721-_burn}.
     *
     * Requirements:
     *
     * - The caller must own `tokenId` or be an approved operator.
     */
    function burn(uint256 tokenId) public virtual {
        // Setting an "auth" arguments enables the `_isAuthorized` check which verifies that the token exists
        // (from != 0). Therefore, it is not needed to verify that the return value is not 0 here.
        _update(address(0), tokenId, _msgSender());
    }
}

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


// OpenZeppelin Contracts (last updated v5.0.0) (access/AccessControl.sol)

pragma solidity ^0.8.20;




/**
 * @dev Contract module that allows children to implement role-based access
 * control mechanisms. This is a lightweight version that doesn't allow enumerating role
 * members except through off-chain means by accessing the contract event logs. Some
 * applications may benefit from on-chain enumerability, for those cases see
 * {AccessControlEnumerable}.
 *
 * Roles are referred to by their `bytes32` identifier. These should be exposed
 * in the external API and be unique. The best way to achieve this is by
 * using `public constant` hash digests:
 *
 * ```solidity
 * bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
 * ```
 *
 * Roles can be used to represent a set of permissions. To restrict access to a
 * function call, use {hasRole}:
 *
 * ```solidity
 * function foo() public {
 *     require(hasRole(MY_ROLE, msg.sender));
 *     ...
 * }
 * ```
 *
 * Roles can be granted and revoked dynamically via the {grantRole} and
 * {revokeRole} functions. Each role has an associated admin role, and only
 * accounts that have a role's admin role can call {grantRole} and {revokeRole}.
 *
 * By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
 * that only accounts with this role will be able to grant or revoke other
 * roles. More complex role relationships can be created by using
 * {_setRoleAdmin}.
 *
 * WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
 * grant and revoke this role. Extra precautions should be taken to secure
 * accounts that have been granted it. We recommend using {AccessControlDefaultAdminRules}
 * to enforce additional security measures for this role.
 */
abstract contract AccessControl is Context, IAccessControl, ERC165 {
    struct RoleData {
        mapping(address account => bool) hasRole;
        bytes32 adminRole;
    }

    mapping(bytes32 role => RoleData) private _roles;

    bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;

    /**
     * @dev Modifier that checks that an account has a specific role. Reverts
     * with an {AccessControlUnauthorizedAccount} error including the required role.
     */
    modifier onlyRole(bytes32 role) {
        _checkRole(role);
        _;
    }

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

    /**
     * @dev Returns `true` if `account` has been granted `role`.
     */
    function hasRole(bytes32 role, address account) public view virtual returns (bool) {
        return _roles[role].hasRole[account];
    }

    /**
     * @dev Reverts with an {AccessControlUnauthorizedAccount} error if `_msgSender()`
     * is missing `role`. Overriding this function changes the behavior of the {onlyRole} modifier.
     */
    function _checkRole(bytes32 role) internal view virtual {
        _checkRole(role, _msgSender());
    }

    /**
     * @dev Reverts with an {AccessControlUnauthorizedAccount} error if `account`
     * is missing `role`.
     */
    function _checkRole(bytes32 role, address account) internal view virtual {
        if (!hasRole(role, account)) {
            revert AccessControlUnauthorizedAccount(account, role);
        }
    }

    /**
     * @dev Returns the admin role that controls `role`. See {grantRole} and
     * {revokeRole}.
     *
     * To change a role's admin, use {_setRoleAdmin}.
     */
    function getRoleAdmin(bytes32 role) public view virtual returns (bytes32) {
        return _roles[role].adminRole;
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     *
     * May emit a {RoleGranted} event.
     */
    function grantRole(bytes32 role, address account) public virtual onlyRole(getRoleAdmin(role)) {
        _grantRole(role, account);
    }

    /**
     * @dev Revokes `role` from `account`.
     *
     * If `account` had been granted `role`, emits a {RoleRevoked} event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     *
     * May emit a {RoleRevoked} event.
     */
    function revokeRole(bytes32 role, address account) public virtual onlyRole(getRoleAdmin(role)) {
        _revokeRole(role, account);
    }

    /**
     * @dev Revokes `role` from the calling account.
     *
     * Roles are often managed via {grantRole} and {revokeRole}: this function's
     * purpose is to provide a mechanism for accounts to lose their privileges
     * if they are compromised (such as when a trusted device is misplaced).
     *
     * If the calling account had been revoked `role`, emits a {RoleRevoked}
     * event.
     *
     * Requirements:
     *
     * - the caller must be `callerConfirmation`.
     *
     * May emit a {RoleRevoked} event.
     */
    function renounceRole(bytes32 role, address callerConfirmation) public virtual {
        if (callerConfirmation != _msgSender()) {
            revert AccessControlBadConfirmation();
        }

        _revokeRole(role, callerConfirmation);
    }

    /**
     * @dev Sets `adminRole` as ``role``'s admin role.
     *
     * Emits a {RoleAdminChanged} event.
     */
    function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
        bytes32 previousAdminRole = getRoleAdmin(role);
        _roles[role].adminRole = adminRole;
        emit RoleAdminChanged(role, previousAdminRole, adminRole);
    }

    /**
     * @dev Attempts to grant `role` to `account` and returns a boolean indicating if `role` was granted.
     *
     * Internal function without access restriction.
     *
     * May emit a {RoleGranted} event.
     */
    function _grantRole(bytes32 role, address account) internal virtual returns (bool) {
        if (!hasRole(role, account)) {
            _roles[role].hasRole[account] = true;
            emit RoleGranted(role, account, _msgSender());
            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Attempts to revoke `role` to `account` and returns a boolean indicating if `role` was revoked.
     *
     * Internal function without access restriction.
     *
     * May emit a {RoleRevoked} event.
     */
    function _revokeRole(bytes32 role, address account) internal virtual returns (bool) {
        if (hasRole(role, account)) {
            _roles[role].hasRole[account] = false;
            emit RoleRevoked(role, account, _msgSender());
            return true;
        } else {
            return false;
        }
    }
}

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


// OpenZeppelin Contracts (last updated v5.0.0) (utils/Pausable.sol)

pragma solidity ^0.8.20;


/**
 * @dev Contract module which allows children to implement an emergency stop
 * mechanism that can be triggered by an authorized account.
 *
 * This module is used through inheritance. It will make available the
 * modifiers `whenNotPaused` and `whenPaused`, which can be applied to
 * the functions of your contract. Note that they will not be pausable by
 * simply including this module, only once the modifiers are put in place.
 */
abstract contract Pausable is Context {
    bool private _paused;

    /**
     * @dev Emitted when the pause is triggered by `account`.
     */
    event Paused(address account);

    /**
     * @dev Emitted when the pause is lifted by `account`.
     */
    event Unpaused(address account);

    /**
     * @dev The operation failed because the contract is paused.
     */
    error EnforcedPause();

    /**
     * @dev The operation failed because the contract is not paused.
     */
    error ExpectedPause();

    /**
     * @dev Initializes the contract in unpaused state.
     */
    constructor() {
        _paused = false;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is not paused.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    modifier whenNotPaused() {
        _requireNotPaused();
        _;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is paused.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    modifier whenPaused() {
        _requirePaused();
        _;
    }

    /**
     * @dev Returns true if the contract is paused, and false otherwise.
     */
    function paused() public view virtual returns (bool) {
        return _paused;
    }

    /**
     * @dev Throws if the contract is paused.
     */
    function _requireNotPaused() internal view virtual {
        if (paused()) {
            revert EnforcedPause();
        }
    }

    /**
     * @dev Throws if the contract is not paused.
     */
    function _requirePaused() internal view virtual {
        if (!paused()) {
            revert ExpectedPause();
        }
    }

    /**
     * @dev Triggers stopped state.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    function _pause() internal virtual whenNotPaused {
        _paused = true;
        emit Paused(_msgSender());
    }

    /**
     * @dev Returns to normal state.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    function _unpause() internal virtual whenPaused {
        _paused = false;
        emit Unpaused(_msgSender());
    }
}

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


// OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol)

pragma solidity ^0.8.20;


/**
 * @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.
 *
 * The initial owner is set to the address provided by the deployer. 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;

    /**
     * @dev The caller account is not authorized to perform an operation.
     */
    error OwnableUnauthorizedAccount(address account);

    /**
     * @dev The owner is not a valid owner account. (eg. `address(0)`)
     */
    error OwnableInvalidOwner(address owner);

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

    /**
     * @dev Initializes the contract setting the address provided by the deployer as the initial owner.
     */
    constructor(address initialOwner) {
        if (initialOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _transferOwnership(initialOwner);
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

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

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        if (owner() != _msgSender()) {
            revert OwnableUnauthorizedAccount(_msgSender());
        }
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby disabling 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 {
        if (newOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _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/nfts/BannerNFT.sol


pragma solidity 0.8.24;




/**
 *  @title BLOCKLORDS
 *  @dev This contract provides functionality for minting, burning, and managing Blocklords Banner NFTs.
 *  @author BLOCKLORDS TEAM
 *  @notice ERC721 token contract representing the Blocklords Banners (BLCK) token.
 */
 
contract BannerNFT is ERC721, ERC721Burnable, ERC721Enumerable, Ownable {

    bool    private lock;            // Reentrancy guard
    string  private baseUri;         // Base URI for token metadata
    address public  verifier;        // Address of the verifier for signature verification
    address private factory;         // Address of the NFT factory contract

    mapping(address => uint256) public nonce;  // Nonce for signature verification

    event Minted(address indexed to, uint256 indexed tokenId, uint256 indexed time);  // Event emitted when a new token is minted
    event SetFactory(address indexed factory, uint256 indexed time);                  // Event emitted when the factory address is set
    event SetVerifier(address indexed verifier, uint256 indexed time);                // Event emitted when the verifier address is set
    event Burned(address indexed owner, uint256 indexed tokenId, uint256 time);       // Event emitted when a token is burned

    /**
     * @dev Constructor function to initialize the BannerNFT contract.
     * @param initialOwner The address that will be set as the initial owner of the contract.
     * @param _verifier The address of the verifier contract used for signature verification.
     */
    constructor(address initialOwner, address _verifier) ERC721("Blocklords Banners", "BLCK") Ownable(initialOwner) {
        require(_verifier != address(0), "Verifier can't be zero address");

        verifier = _verifier;
    }

    /**
     * @dev Modifier to prevent reentrancy attacks.
     */
    modifier nonReentrant() {
        require(!lock, "No reentrant call");
        lock = true;
        _;
        lock = false;
    }

    /**
     * @dev Modifier to restrict access to only the factory contract.
     */
    modifier onlyFactory() {
        require(factory == _msgSender(), "Only NFT Factory can call the method");
        _;
    }

    /**
     * @dev Safely mints a new Banner NFT.
     * @param _to Address to mint the token to.
     * @param _tokenId ID of the token to mint.
     * @param _deadline Expiry timestamp for the signature.
     * @param _v ECDSA signature parameter v.
     * @param _r ECDSA signature parameter r.
     * @param _s ECDSA signature parameter s.
     * @return The ID of the minted token.
     */
    function safeMint(address _to, uint256 _tokenId, uint256 _deadline, uint8 _v, bytes32 _r, bytes32 _s) external nonReentrant returns (uint256) {
        require(_deadline >= block.timestamp, "Signature has expired");
        
        {
            bytes memory prefix     = "\x19Ethereum Signed Message:\n32";
            bytes32 message         = keccak256(abi.encodePacked(_to, _tokenId, address(this), nonce[_to], _deadline, block.chainid));
            bytes32 hash            = keccak256(abi.encodePacked(prefix, message));
            address recover         = ecrecover(hash, _v, _r, _s);

            require(recover == verifier, "Verification failed about mint banner nft");
        }

        nonce[_to]++;
        _safeMint(_to, _tokenId);
        
        emit Minted(_to, _tokenId, block.timestamp);
        return _tokenId;
    }

    /**
     * @dev Mints a new Banner NFT.
     * @param _to Address to mint the token to.
     * @param _tokenId ID of the token to mint.
     * @return The ID of the minted token.
     */
    function mint(address _to, uint256 _tokenId) external onlyFactory nonReentrant returns (uint256) {     
        nonce[_to]++;
        _safeMint(_to, _tokenId);
        
        emit Minted(_to, _tokenId, block.timestamp);
        return _tokenId;
    }

    /**
     * @dev Burns a Banner NFT.
     * @param _tokenId ID of the token to burn.
     */
    function burn(uint256 _tokenId) public override nonReentrant {
        require(ownerOf(_tokenId) == msg.sender, "You are not the owner of this token");
        _burn(_tokenId);

        emit Burned(msg.sender, _tokenId, block.timestamp);
    }

    // Method called by the contract owner    
    /**
     * @dev Sets the base URI for token metadata.
     * @param _baseUri The base URI to set.
     */
    function setBaseURI(string calldata _baseUri) external onlyOwner() {
        baseUri = _baseUri;
    }

    /**
     * @dev Sets the verifier address for signature verification.
     * @param _verifier The verifier address to set.
     */
    function setVerifier (address _verifier) external onlyOwner {
        require(_verifier != address(0), "Verifier can't be zero address ");
        verifier = _verifier;

        emit SetVerifier(_verifier, block.timestamp);
    }

    /**
     * @dev Sets the address of the NFT Factory contract.
     * @param _factory The address of the NFT Factory contract.
     */
    function setFactory(address _factory) public onlyOwner {
        require(_factory != address(0), "Factory can't be zero address ");
	    factory = _factory;

        emit SetFactory(_factory, block.timestamp);
    }

    // The following functions are overrides required by Solidity.
    function _update(address to, uint256 tokenId, address auth) internal override(ERC721, ERC721Enumerable) returns (address) {
        return super._update(to, tokenId, auth);
    }

    function _increaseBalance(address account, uint128 value) internal override(ERC721, ERC721Enumerable) {
        super._increaseBalance(account, value);
    }

    function supportsInterface(bytes4 interfaceId) public view override(ERC721, ERC721Enumerable) returns (bool) {
        return super.supportsInterface(interfaceId);
    }

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



// File: contracts/nfts/HeroNFT.sol


pragma solidity 0.8.24;




/**
 * @title BLOCKLORDS
 * @dev This contract provides functionality for minting, burning, and managing Blocklords Hero NFTs.
 * @author BLOCKLORDS TEAM
 * @notice ERC721 token contract representing the Blocklords Heroes (BLHE) token.
 */
 
contract HeroNFT is ERC721, ERC721Burnable, ERC721Enumerable, Ownable {

    bool    private lock;           // Reentrancy guard
    string  private baseUri;        // Base URI for token metadata
    address public  verifier;       // Address of the verifier for signature verification
    address private factory;        // Address of the NFT Factory contract

    mapping(address => uint256) public nonce;    // Nonce for signature verification

    event Minted(address indexed to, uint256 indexed tokenId, uint256 indexed time);  // Event emitted when a new token is minted
    event SetFactory(address indexed factory, uint256 indexed time);                  // Event emitted when the factory address is set
    event SetVerifier(address indexed verifier, uint256 indexed time);                // Event emitted when the verifier address is set
    event Burned(address indexed owner, uint256 indexed tokenId, uint256 time);       // Event emitted when a token is burned

    /**
     * @dev Constructor function to initialize the HeroNFT contract.
     * @param initialOwner The address that will be set as the initial owner of the contract.
     * @param _verifier The address of the verifier contract used for signature verification.
     */
    constructor(address initialOwner, address _verifier) ERC721("Blocklords Heroes", "BLHE") Ownable(initialOwner) {
        require(_verifier != address(0), "Verifier can't be zero address");

        verifier = _verifier;
    }
    
    /**
     * @dev Modifier to prevent reentrancy attacks.
     */
    modifier nonReentrant() {
        require(!lock, "No reentrant call");
        lock = true;
        _;
        lock = false;
    }

    /**
     * @dev Modifier to allow only the NFT Factory contract to call the method.
     */
    modifier onlyFactory() {
        require(factory == _msgSender(), "Only NFT factory can call the method");
        _;
    }
    
    /**
     * @dev Safely mints a new Hero NFT.
     * @param _to Address to mint the token to.
     * @param _tokenId ID of the token to mint.
     * @param _deadline Expiry timestamp for the signature.
     * @param _v ECDSA signature parameter v.
     * @param _r ECDSA signature parameter r.
     * @param _s ECDSA signature parameter s.
     * @return The ID of the minted token.
     */
    function safeMint(address _to, uint256 _tokenId, uint256 _deadline, uint8 _v, bytes32 _r, bytes32 _s) external nonReentrant returns (uint256) {
        require(_deadline >= block.timestamp, "Signature has expired");

        {
            bytes memory prefix     = "\x19Ethereum Signed Message:\n32";
            bytes32 message         = keccak256(abi.encodePacked(_to, _tokenId, address(this), nonce[_to], _deadline, block.chainid));
            bytes32 hash            = keccak256(abi.encodePacked(prefix, message));
            address recover         = ecrecover(hash, _v, _r, _s);

            require(recover == verifier, "Verification failed about mint hero nft");
        }

        nonce[_to]++;

        _safeMint(_to, _tokenId);
        
        emit Minted(_to, _tokenId, block.timestamp);
        return _tokenId;
    }
    
    /**
     * @dev Mints a new Hero NFT.
     * @param _to Address to mint the token to.
     * @param _tokenId ID of the token to mint.
     * @return The ID of the minted token.
     */
    function mint(address _to, uint256 _tokenId) external onlyFactory nonReentrant returns (uint256) {     
        nonce[_to]++;

        _safeMint(_to, _tokenId);
        
        emit Minted(_to, _tokenId, block.timestamp);
        return _tokenId;
    }

    /**
     * @dev Burns a Hero NFT.
     * @param _tokenId ID of the token to burn.
     */
    function burn(uint256 _tokenId) public override nonReentrant {
        require(ownerOf(_tokenId) == msg.sender, "You are not the owner of this token");
        _burn(_tokenId);

        emit Burned(msg.sender, _tokenId, block.timestamp);
    }

    // Method called by the contract owner
    /**
     * @dev Sets the base URI for token metadata.
     * @param _baseUri The base URI to set.
     */
    function setBaseURI(string calldata _baseUri) external onlyOwner() {
        baseUri = _baseUri;
    }

    /**
     * @dev Sets the address of the verifier for signature verification.
     * @param _verifier The address of the verifier contract.
     */
    function setVerifier (address _verifier) external onlyOwner {
        require(_verifier != address(0), "Verifier can't be zero address ");
        verifier = _verifier;

        emit SetVerifier(_verifier, block.timestamp);
    }

    /**
     * @dev Sets the address of the NFT Factory contract.
     * @param _factory The address of the NFT Factory contract.
     */
    function setFactory(address _factory) public onlyOwner {
        require(_factory != address(0), "Factory can't be zero address ");
	    factory = _factory;

        emit SetFactory(_factory, block.timestamp);
    }

    // The following functions are overrides required by Solidity.
    function _update(address to, uint256 tokenId, address auth) internal override(ERC721, ERC721Enumerable) returns (address) {
        return super._update(to, tokenId, auth);
    }

    function _increaseBalance(address account, uint128 value) internal override(ERC721, ERC721Enumerable) {
        super._increaseBalance(account, value);
    }

    function supportsInterface(bytes4 interfaceId) public view override(ERC721, ERC721Enumerable) returns (bool) {
        return super.supportsInterface(interfaceId);
    }

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



// File: contracts/nfts/OrbNFT.sol


pragma solidity 0.8.24;




/**
 * @title BLOCKLORDS
 * @dev This contract provides functionality for minting, burning, and managing Blocklords Orb NFTs.
 * @author BLOCKLORDS TEAM
 * @notice ERC721 token contract representing the Blocklords Orbs (ORB) token.
 */
 
contract OrbNFT is ERC721, ERC721Burnable, ERC721Enumerable, Ownable {

    bool    private lock;              // Reentrancy guard
    uint256 private nextTokenId;       // Next available token ID
    string  private baseUri;           // Base URI for token metadata
    address public  verifier;          // Address of the verifier for signature verification
    address private factory;           // Address of the NFT factory contract

    
    mapping(uint256 => uint256) public quality;        // Mapping from token ID to quality (tokenId => quality), quality represented by numbers (1 to 6)
    mapping(uint256 => uint256) public qualityLimit;   // Mapping from quality to quality limits (maximum supply per quality)
    mapping(address => uint256) public nonce;          // Mapping from address to nonce for signature verification

    event Minted(address indexed to, uint256 indexed tokenId, uint256 indexed quality, uint256 time);   // Event emitted when a new token is minted
    event SetFactory(address indexed factory, uint256 indexed time);                                            // Event emitted when the factory address is set
    event SetVerifier(address indexed verifier, uint256 indexed time);                                          // Event emitted when the verifier address is set
    event Burned(address indexed owner, uint256 indexed tokenId, uint256 indexed quality, uint256 time);        // Event emitted when a token is burned

    /**
     * @dev Contract constructor
     * @param initialOwner Address of the initial owner
     * @param _verifier Address of the verifier for signature verification
     */
    constructor(address initialOwner, address _verifier) ERC721("Blocklords Orbs", "ORB") Ownable(initialOwner) {
        require(_verifier != address(0), "Verifier can't be zero address");

        nextTokenId = 1;
        verifier    = _verifier;
        factory     = initialOwner;

        // set quality limits
        qualityLimit[1] = 10000;
        qualityLimit[2] = 3000;
        qualityLimit[3] = 1000;
        qualityLimit[4] = 500;
        qualityLimit[5] = 200;
        qualityLimit[6] = 100;
    }
    
    /**
     * @dev Modifier to prevent reentrancy attacks.
     */
    modifier nonReentrant() {
        require(!lock, "No reentrant call");
        lock = true;
        _;
        lock = false;
    }
    
    /**
     * @dev Modifier to restrict access to only the factory contract.
     */
    modifier onlyFactory() {
        require(factory == _msgSender(), "Only NFT Factory can call the method");
        _;
    }
     
    /**
     * @dev Safely mints a new Orb NFT.
     * @param _to Address to mint the token to.
     * @param _quality Quality of the orb to mint.
     * @param _deadline Expiry timestamp for the signature.
     * @param _v ECDSA signature parameter v.
     * @param _r ECDSA signature parameter r.
     * @param _s ECDSA signature parameter s.
     * @return The ID of the minted token.
     */
    function safeMint(address _to, uint256 _quality, uint256 _deadline, uint8 _v, bytes32 _r, bytes32 _s) external nonReentrant returns (uint256) {
        require(_quality >= 1 && _quality <= 6, "Invalid quality");
        require(_deadline >= block.timestamp, "Signature has expired");
        require(qualityLimit[_quality] > 0, "Quality has reached its limit");

        {
            bytes memory prefix     = "\x19Ethereum Signed Message:\n32";
            bytes32 message         = keccak256(abi.encodePacked(_to, _quality, address(this), nonce[_to], _deadline, block.chainid));
            bytes32 hash            = keccak256(abi.encodePacked(prefix, message));
            address recover         = ecrecover(hash, _v, _r, _s);

            require(recover == verifier, "Verification failed about mint orb nft");
        }

        uint256 _tokenId = nextTokenId++;

        // decrease quality limit
        qualityLimit[_quality]--;
        quality[_tokenId] = _quality;
        nonce[_to]++;

        _safeMint(_to, _tokenId);
        
        emit Minted(_to, _tokenId, _quality, block.timestamp);
        return _tokenId;
    }

    
    /**
     * @dev Mints a new Orb NFT.
     * @param _to Address to mint the token to.
     * @param _quality Quality of the orb to mint.
     * @return The ID of the minted token.
     */
    function mint(address _to, uint256 _quality) external onlyFactory nonReentrant returns (uint256) {
        require(_quality >= 1 && _quality <= 6, "Invalid quality");
        require(qualityLimit[_quality] > 0, "Quality has reached its limit");

        uint256 _tokenId = nextTokenId++;

        // decrease quality limit
        qualityLimit[_quality]--;
        quality[_tokenId] = _quality;
        nonce[_to]++;

        _safeMint(_to, _tokenId);
        
        emit Minted(_to, _tokenId, _quality, block.timestamp);
        return _tokenId;
    }

    /**
     * @dev Burns a Orb NFT.
     * @param _tokenId ID of the token to burn.
     */
    function burn(uint256 _tokenId) public override nonReentrant {
        require(ownerOf(_tokenId) == msg.sender, "You are not the owner of this token");
        uint256 _quality = quality[_tokenId];
        _burn(_tokenId);

        emit Burned(msg.sender, _tokenId, _quality, block.timestamp);
    }
    
    // Method called by the contract owner
    /**
     * @dev Sets the base URI for token metadata.
     * @param _baseUri The base URI to set.
     */
    function setBaseURI(string calldata _baseUri) external onlyOwner() {
        baseUri = _baseUri;
    }

    /**
     * @dev Sets the factory address.
     * @param _factory Address of the factory contract.
     */
    function setFactory(address _factory) public onlyOwner {
        require(_factory != address(0), "Factory can't be zero address ");
	    factory = _factory;

        emit SetFactory(_factory, block.timestamp);
    }

    /**
     * @dev Sets the verifier address for signature verification.
     * @param _verifier The verifier address to set.
     */
    function setVerifier (address _verifier) external onlyOwner {
        require(_verifier != address(0), "Verifier can't be zero address ");
        verifier = _verifier;

        emit SetVerifier(_verifier, block.timestamp);
    }

    // The following functions are overrides required by Solidity.
    function _update(address to, uint256 tokenId, address auth) internal override(ERC721, ERC721Enumerable) returns (address) {
        return super._update(to, tokenId, auth);
    }

    function _increaseBalance(address account, uint128 value) internal override(ERC721, ERC721Enumerable) {
        super._increaseBalance(account, value);
    }

    function supportsInterface(bytes4 interfaceId) public view override(ERC721, ERC721Enumerable) returns (bool) {
        return super.supportsInterface(interfaceId);
    }

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



// File: contracts/nfts/NftFactory.sol


pragma solidity 0.8.24;






/**
 *  @title BLOCKLORDS
 *  @dev A contract for minting different types of NFTs such as Orb, Hero, and Banner.
 *  It provides role-based access control to manage NFT generation and administration.
 *  @author BLOCKLORDS TEAM
 *  @notice This contract is part of the BLOCKLORDS ecosystem and facilitates the creation and management of NFTs.
 */
 
contract NftFactory is AccessControl, Ownable {
    
    bytes32 public constant HERO_GENERATOR_ROLE   = keccak256("HEROGENERATOR");   // Role for the hero NFT generator
    bytes32 public constant BANNER_GENERATOR_ROLE = keccak256("BANNERGENERATOR"); // Role for the banner NFT generator
    bytes32 public constant ORB_GENERATOR_ROLE    = keccak256("ORBGENERATOR");    // Role for the orb NFT generator

    OrbNFT    private orbNft;    // Instance of the OrbNFT contract
    HeroNFT   private heroNft;   // Instance of the HeroNFT contract
    BannerNFT private bannerNft; // Instance of the BannerNFT contract

    event AdminAdded(address indexed owner, address indexed admin, uint256 indexed time);                      // An admin is added.
    event AdminRemoved(address indexed owner, address indexed admin, uint256 indexed time);                    // An admin is removed.
    event SetOrbNft(address indexed admin, address indexed orbNft, uint256 indexed time);                      // The OrbNFT contract address is set.
    event SetHeroNft(address indexed admin, address indexed heroNft, uint256 indexed time);                    // The HeroNFT contract address is set.
    event SetBannerNft(address indexed admin, address indexed bannerNft, uint256 indexed time);                // The BannerNFT contract address is set.
    event OrbGeneratorAdded(address indexed admin, address indexed OrbGenerator, uint256 indexed time);        // An account is granted the Orb Generator role.
    event OrbGeneratorRemoved(address indexed admin, address indexed OrbGenerator, uint256 indexed time);      // An account is removed from the Orb Generator role.
    event HeroGeneratorAdded(address indexed admin, address indexed OrbGenerator, uint256 indexed time);       // An account is granted the Hero Generator role.
    event HeroGeneratorRemoved(address indexed admin, address indexed OrbGenerator, uint256 indexed time);     // An account is removed from the Hero Generator role.
    event BannerGeneratorAdded(address indexed admin, address indexed OrbGenerator, uint256 indexed time);     // An account is granted the Banner Generator role.
    event BannerGeneratorRemoved(address indexed admin, address indexed OrbGenerator, uint256 indexed time);   // An account is removed from the Banner Generator role.

    /**
     * @dev Initializes the NftFactory contract.
     * @param initialOwner The address of the initial owner of the contract.
     * @param _heroNft The address of the Hero NFT contract.
     * @param _bannerNft The address of the Banner NFT contract.
     * @param _orbNft The address of the Orb NFT contract.
     */
    constructor(address initialOwner, address _heroNft, address _bannerNft, address _orbNft) Ownable(initialOwner) {
        require(_heroNft   != address(0), "hero nft can't be zero address");
        require(_bannerNft != address(0), "banner nft can't be zero address");
        require(_orbNft    != address(0), "orb nft can't be zero address");

	    heroNft   = HeroNFT(_heroNft);
	    bannerNft = BannerNFT(_bannerNft);
	    orbNft    = OrbNFT(_orbNft);

	    // Grant the default admin role to the initial owner
	    _grantRole(DEFAULT_ADMIN_ROLE, initialOwner);
    }

    /**
    * @dev Modifier that restricts access to functions to only accounts with the admin role.
    * Reverts with an error message if the caller is not an admin.
    */
    modifier onlyAdmin() {
	    require(isAdmin(msg.sender), "Restricted to admins.");
	    _;
    }

    /**
    * @dev Modifier that restricts access to functions to only accounts with the orb generator role.
    * Reverts with an error message if the caller is not an orb generator.
    */
    modifier onlyOrbGenerator() {
        require(isOrbGenerator(msg.sender), "Restricted to random orb generator.");
        _;
    }

    /**
    * @dev Modifier that restricts access to functions to only accounts with the hero generator role.
    * Reverts with an error message if the caller is not a hero generator.
    */
    modifier onlyHeroGenerator() {
        require(isHeroGenerator(msg.sender), "Restricted to random hero generator.");
        _;
    }

    /**
    * @dev Modifier that restricts access to functions to only accounts with the banner generator role.
    * Reverts with an error message if the caller is not a banner generator.
    */
    modifier onlyBannerGenerator() {
        require(isBannerGenerator(msg.sender), "Restricted to random banner generator.");
        _;
    }

    /**
    * @dev Mints a Hero NFT and assigns it to the specified address.
    * Can only be called by accounts with the Hero NFT generator role.
    * @param _to The address to which the newly minted Hero NFT will be assigned.
    * @param _tokenId The ID of the Hero NFT to be minted.
    * @return The ID of the newly minted Hero NFT.
    */
    function mintHero(address _to, uint256 _tokenId) external onlyHeroGenerator returns(uint256) {
	    return heroNft.mint(_to, _tokenId);
    }

    /**
    * @dev Mints a Banner NFT and assigns it to the specified address.
    * Can only be called by accounts with the Banner NFT generator role.
    * @param _to The address to which the newly minted Banner NFT will be assigned.
    * @param _tokenId The ID of the Banner NFT to be minted.
    * @return The ID of the newly minted Banner NFT.
    */
    function mintBanner(address _to, uint256 _tokenId) external onlyBannerGenerator returns(uint256) {
	    return bannerNft.mint(_to, _tokenId);
    }

    /**
     * @dev Mints an Orb NFT and assigns it to the specified address.
     * Can only be called by accounts with the Orb NFT generator role.
     * @param _to The address to which the newly minted Orb NFT will be assigned.
     * @param _quality The quality of the Orb NFT to be minted.
     * @return The ID of the newly minted Orb NFT.
     */
    function mintOrb(address _to, uint256 _quality) external onlyOrbGenerator returns(uint256) {
	    return orbNft.mint(_to, _quality);
    }

    //--------------------------------------------------
    // Only owner
    //--------------------------------------------------
    /**
    * @dev Adds the specified account to the admin role.
    * Can only be called by the contract owner.
    * @param _account The address to be added as an admin.
    */
    function addAdmin(address _account) external virtual onlyOwner {
        grantRole(DEFAULT_ADMIN_ROLE, _account);

        emit AdminAdded(msg.sender, _account, block.timestamp);
    }

    /**
    * @dev Removes the specified account from the admin role.
    * Can only be called by the contract owner.
    * @param _account The address to be removed from the admin role.
    */
    function removeAdmin(address _account) external virtual onlyOwner {
        require(_account != owner(), "Cannot remove contract owner as admin");
	    renounceRole(DEFAULT_ADMIN_ROLE, _account);
        
        emit AdminRemoved(msg.sender, _account, block.timestamp);
    }

    /**
    * @dev Checks if the specified account belongs to the admin role.
    * @param _account The address to be checked.
    * @return A boolean indicating whether the account is an admin.
    */
    function isAdmin(address _account) public virtual view returns (bool) {
	    return hasRole(DEFAULT_ADMIN_ROLE, _account);
    }

    //--------------------------------------------------
    // Only admin
    //--------------------------------------------------
    /**
    * @dev Sets the address of the Orb NFT contract.
    * Can only be called by an admin.
    * @param _orbNft The address of the Orb NFT contract.
    */
    function setOrbNft(address _orbNft) external onlyAdmin {
        require(_orbNft != address(0), "orb nft can't be zero address");
	    orbNft = OrbNFT(_orbNft);

        emit SetOrbNft(msg.sender, _orbNft, block.timestamp);
    }

    /**
    * @dev Sets the address of the Hero NFT contract.
    * Can only be called by an admin.
    * @param _heroNft The address of the Hero NFT contract.
    */
    function setHeroNft(address _heroNft) external onlyAdmin {
        require(_heroNft != address(0), "hero nft can't be zero address");
	    heroNft = HeroNFT(_heroNft);

        emit SetHeroNft(msg.sender, _heroNft, block.timestamp);
    }

    /**
    * @dev Sets the address of the Banner NFT contract.
    * Can only be called by an admin.
    * @param _bannerNft The address of the Banner NFT contract.
    */
    function setBannerNft(address _bannerNft) external onlyAdmin {
        require(_bannerNft != address(0), "banner nft can't be zero address");
	    bannerNft = BannerNFT(_bannerNft);

        emit SetBannerNft(msg.sender, _bannerNft, block.timestamp);
    }

    /**
    * @dev Adds an account to the hero generator role.
    * Can only be called by an admin.
    * @param _account The address to be added to the hero generator role.
    */
    function addHeroGenerator(address _account) external virtual onlyAdmin {
	    grantRole(HERO_GENERATOR_ROLE, _account);

        emit HeroGeneratorAdded(msg.sender, _account, block.timestamp);
    }

    /**
    * @dev Removes an account from the hero generator role.
    * Can only be called by an admin.
    * @param _account The address to be removed from the hero generator role.
    */
    function removeHeroGenerator(address _account) external virtual onlyAdmin {
	    revokeRole(HERO_GENERATOR_ROLE, _account);

        emit HeroGeneratorRemoved(msg.sender, _account, block.timestamp);
    }

    /**
    * @dev Checks whether an account belongs to the hero generator role.
    * @param _account The address to be checked.
    * @return A boolean indicating whether the account belongs to the hero generator role.
    */
    function isHeroGenerator(address _account) public virtual view returns (bool) {
        return hasRole(HERO_GENERATOR_ROLE, _account);
    }

    /**
    * @dev Adds an account to the banner generator role.
    * Can only be called by an admin.
    * @param _account The address to be added to the banner generator role.
    */
    function addBannerGenerator(address _account) external virtual onlyAdmin {
	    grantRole(BANNER_GENERATOR_ROLE, _account);

        emit BannerGeneratorAdded(msg.sender, _account, block.timestamp);
    }

    /**
    * @dev Removes an account from the banner generator role.
    * Can only be called by an admin.
    * @param _account The address to be removed from the banner generator role.
    */
    function removeBannerGenerator(address _account) external virtual onlyAdmin {
	    revokeRole(BANNER_GENERATOR_ROLE, _account);

        emit BannerGeneratorRemoved(msg.sender, _account, block.timestamp);
    }

    /**
    * @dev Checks whether an account belongs to the banner generator role.
    * @param _account The address to be checked.
    * @return A boolean indicating whether the account belongs to the banner generator role.
    */
    function isBannerGenerator(address _account) public virtual view returns (bool) {
        return hasRole(BANNER_GENERATOR_ROLE, _account);
    }

    /**
    * @dev Adds an account to the orb generator role.
    * Can only be called by an admin.
    * @param _account The address to be added to the orb generator role.
    */
    function addOrbGenerator(address _account) external virtual onlyAdmin {
	    grantRole(ORB_GENERATOR_ROLE, _account);

        emit OrbGeneratorAdded(msg.sender, _account, block.timestamp);
    }

    /**
    * @dev Removes an account from the orb generator role.
    * Can only be called by an admin.
    * @param _account The address to be removed from the orb generator role.
    */
    function removeOrbGenerator(address _account) external virtual onlyAdmin {
	    revokeRole(ORB_GENERATOR_ROLE, _account);

        emit OrbGeneratorRemoved(msg.sender, _account, block.timestamp);
    }

    /**
    * @dev Checks whether an account belongs to the orb generator role.
    * @param _account The address to be checked.
    * @return A boolean indicating whether the account belongs to the orb generator role.
    */
    function isOrbGenerator(address _account) public virtual view returns (bool) {
        return hasRole(ORB_GENERATOR_ROLE, _account);
    }
}

// File: contracts/game/Duel.sol


pragma solidity 0.8.24;






/**
 *  @title BLOCKLORDS
 *  @dev Contract for managing hero duels within the Blocklords ecosystem.
 *  @author BLOCKLORDS TEAM
 *  @notice This contract facilitates the initiation and conclusion of hero duels.
 *  It also enables players to claim rewards for participating in seasonal events.
 *  Hero and banner NFTs are used as assets for dueling and rewards.
 *  ERC721 token contract addresses for hero and banner NFTs are required.
 */

contract Duel is IERC721Receiver, Pausable, Ownable {
    bool    private lock;                       // Reentrancy guard
    address public  heroNft;                    // Address of the hero NFT contract
    address public  verifier;                   // Address of the verifier for signature verification
    address public  nftFactory;                 // Address of the NFT Factory contract
    uint256 public  maxNFTsWithdrawal = 4;     // Maximum number of NFTs allowed to be withdrawn in a season

    mapping(address => uint256) public playerData;                          // Player data tracking the hero NFT being used in a duel
    mapping(address => uint256) public nonce;                               // Nonce for signature verification
    mapping(uint256 => address) public nftTypes;                            // Mapping from NFT type index to its contract address
    mapping(address => mapping(uint256 => bool)) public withdrawnSeasonIds; // Tracks which seasonId each address has already withdrawn

    event StartDuel(address indexed owner, uint256 indexed nftId, uint256 time);    // Event emitted when a duel is initiated
    event FinishDuel(address indexed owner, uint256 indexed nftId, uint256 time);   // Event emitted when a duel is concluded
    event SeasonWithdraw(address indexed recipient, uint256 seasonId, uint256[] indexed nftTypeIndices, uint256[] indexed tokenIds, uint256 timestamp);  // Event emitted when a player withdraws rewards for a season
    event FactorySet(address indexed factoryAddress, uint256 indexed time);         // Event emitted when the NFT Factory contract address is set
    event NftTypeAdded(address indexed NFTAddress, uint256 indexed time);           // Event emitted when a new NFT contract address is added
	event SetMaxNFTsWithdrawal(uint256 indexed MaxNFTsAmount, uint256 indexed time);// Event emitted when the maximum NFT withdrawal limit has been updated
    
    /**
     * @dev Constructor function to initialize the Duel contract.
     * @param initialOwner The address of the initial owner of the contract.
     * @param _heroNft The address of the Hero NFT contract.
     * @param _bannerNft The address of the Banner NFT contract.
     * @param _factory The address of the NFT Factory contract.
     * @param _verifier The address of the verifier for signature verification.
     */
    constructor(address initialOwner, address _heroNft, address _bannerNft, address _factory, address _verifier) Ownable(initialOwner) {
        require(_heroNft    != address(0), "Hero nft can't be zero address");
        require(_bannerNft  != address(0), "BannerNft can't be zero address");
        require(_factory    != address(0), "Factory can't be zero address");
        require(_verifier   != address(0), "Verifier can't be zero address");
        
        heroNft    = _heroNft;
        nftFactory = _factory;
        verifier   = _verifier;

        nftTypes[0] = _heroNft;
        nftTypes[1] = _bannerNft;
    }

    /**
     * @dev Reentrancy guard modifier to prevent reentrant calls.
     */
    modifier nonReentrant() {
        require(!lock, "No reentrant call");
        lock = true;
        _;
        lock = false;
    }

    /**
     * @dev Initiates a hero duel.
     * @param _from The address initiating the duel.
     * @param _nftId The ID of the hero NFT used in the duel.
     * @param _deadline The deadline for signature verification.
     * @param _v Recovery id of the signer.
     * @param _r Signature data.
     * @param _s Signature data.
     */
    function startDuel(address _from, uint256 _nftId, uint256 _deadline, uint8 _v, bytes32 _r, bytes32 _s) external nonReentrant whenNotPaused {
        require(_deadline >= block.timestamp, "Signature has expired");
        require(_nftId > 0, "Nft Id invalid");
        require(playerData[_from] == 0, "The NFT has been imported");

        IERC721 nft = IERC721(heroNft);
        require(nft.ownerOf(_nftId) == _from, "Not hero nft owner");
        {
            bytes memory prefix     = "\x19Ethereum Signed Message:\n32";
            bytes32 message         = keccak256(abi.encodePacked(_nftId, _from, address(this), nonce[_from], _deadline, block.chainid));
            bytes32 hash            = keccak256(abi.encodePacked(prefix, message));
            address recover         = ecrecover(hash, _v, _r, _s);

            require(recover == verifier, "Verification failed about startDuel");
        }

        nonce[_from]++;
        playerData[_from] = _nftId;

        nft.safeTransferFrom(_from, address(this), _nftId);

        emit StartDuel(_from, _nftId, block.timestamp);
    }

    /**
     * @dev Concludes a hero duel.
     * @param _from The address concluding the duel.
     * @param _nftId The ID of the hero NFT used in the duel.
     * @param _deadline The deadline for signature verification.
     * @param _v Recovery id of the signer.
     * @param _r Signature data.
     * @param _s Signature data.
     */
    function finishDuel(address _from, uint256 _nftId, uint256 _deadline, uint8 _v, bytes32 _r, bytes32 _s) external nonReentrant whenNotPaused {
        require(_deadline >= block.timestamp, "Signature has expired");
        require(_nftId > 0, "Nft Id invalid");
        require(playerData[_from] == _nftId, "The nft for export is different from that for import");

        {
            bytes memory prefix     = "\x19Ethereum Signed Message:\n32";
            bytes32 message         = keccak256(abi.encodePacked(_nftId, _from, address(this), nonce[_from], _deadline, block.chainid));
            bytes32 hash            = keccak256(abi.encodePacked(prefix, message));
            address recover         = ecrecover(hash, _v, _r, _s);

            require(recover == verifier, "Verification failed about finishDuel");
        }

        nonce[_from]++;
        delete playerData[_from];

        IERC721 nft = IERC721(heroNft);
        nft.safeTransferFrom( address(this), _from, _nftId);

        emit FinishDuel(_from, _nftId, block.timestamp);
    }
    /**
     * @dev Claims rewards for a specific season.
     * @param _seasonId The ID of the seasonal event.
     * @param _data Data containing indices of NFT types and corresponding token IDs.     
     * @param _deadline The deadline for signature verification.
     * @param _v Recovery id of the signer.
     * @param _r Signature data.
     * @param _s Signature data.
     */
    function seasonWithdraw(uint256 _seasonId, bytes calldata _data, uint256 _deadline, uint8 _v, bytes32 _r, bytes32 _s) external nonReentrant whenNotPaused {
        // Ensure signature has not expired
        require(_deadline >= block.timestamp, "Signature has expired");

        // Check if the player has already withdrawn rewards for this season
        require(!withdrawnSeasonIds[msg.sender][_seasonId], "You have already withdrawn rewards for this season");
        
        (uint256[] memory nftTypeIndices, uint256[] memory tokenIds) 
            = abi.decode(_data, (uint256[], uint256[]));

        // The number of NFT mint does not exceed the set upper limit
        require(nftTypeIndices.length <= maxNFTsWithdrawal, "Exceeds maximum allowed NFTs per withdrawal");

        // Validate chest data format
        require(nftTypeIndices.length == tokenIds.length, "Invalid data format");
        
        {
            bytes memory prefix     = "\x19Ethereum Signed Message:\n32";
            bytes32 message         = keccak256(abi.encodePacked(msg.sender, _seasonId, _data, address(this), nonce[msg.sender], _deadline, block.chainid));
            bytes32 hash            = keccak256(abi.encodePacked(prefix, message));
            address recover         = ecrecover(hash, _v, _r, _s);

            require(recover == verifier, "Verification failed about season withdrow");
        }

        nonce[msg.sender]++;

        for (uint256 i = 0; i < nftTypeIndices.length; i++) {
            uint256 nftTypeIndex = nftTypeIndices[i];
            uint256 tokenId = tokenIds[i];
            _mint(nftTypeIndex, tokenId);
        }

        // Mark that the player has withdrawn rewards for this season
        withdrawnSeasonIds[msg.sender][_seasonId] = true;

        emit SeasonWithdraw(msg.sender, _seasonId, nftTypeIndices, tokenIds, block.timestamp);
    }
    
    /**
     * @dev Depending on the type, mints different kinds of NFTs.
     * @param _nftTypeIndex The index representing the type of NFT.
     * @param _tokenId The ID of the NFT token.
     */
    function _mint(uint256 _nftTypeIndex, uint256 _tokenId) internal {
            address nftContract = nftTypes[_nftTypeIndex];
            require(nftContract != address(0), "Unsupported NFT type");

            if(_nftTypeIndex == 0){
                NftFactory(nftFactory).mintHero(msg.sender, _tokenId);     //mint hero nft
            } else if(_nftTypeIndex == 1){
                NftFactory(nftFactory).mintBanner(msg.sender, _tokenId);   //mint banner nft
            }
    }

    // Method called by the contract owner
    /**
     * @dev Sets the address of the verifier for signature verification.
     * @param _verifier The address of the verifier contract.
     */
    function setVerifier(address _verifier) external onlyOwner {
        require(_verifier != address(0), "Verifier can't be zero address ");
        verifier = _verifier;
    }

    /**
     * @dev Sets the address of the NFT Factory contract.
     * @param _address The address of the NFT Factory contract.
     */
    function setNftFactory(address _address) external onlyOwner {
		require(_address != address(0), "Nft factory address can not be be zero");
		nftFactory =_address;

		emit FactorySet(_address, block.timestamp);	    
    }

    /**
    * @dev Sets the maximum number of NFTs allowed to be withdrawn in a season.
    * @param _maxNFTs The maximum number of NFTs allowed to be withdrawn.
    */
    function setMaxNFTsWithdrawal(uint256 _maxNFTs) external onlyOwner {
        require(_maxNFTs > 0, "Maximum NFTs withdrawal must be greater than zero");
        maxNFTsWithdrawal = _maxNFTs;
        
		emit SetMaxNFTsWithdrawal(_maxNFTs, block.timestamp);	  
    }

    function pause() public onlyOwner {
        _pause();
    }

    function unpause() public onlyOwner {
        _unpause();
    }

    /// @dev encrypt token data
    /// @return encrypted data
    function onERC721Received(address, address, uint256, bytes calldata) external override pure returns (bytes4) {
        return IERC721Receiver.onERC721Received.selector;
    }
}

{
  "compilationTarget": {
    "Duel.sol": "Duel"
  },
  "evmVersion": "shanghai",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": false,
    "runs": 200
  },
  "remappings": []
}