// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (access/AccessControl.sol)

pragma solidity ^0.8.0;

import "./IAccessControl.sol";
import "../utils/Context.sol";
import "../utils/Strings.sol";
import "../utils/introspection/ERC165.sol";

/**
 * @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:
 *
 * ```
 * 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}:
 *
 * ```
 * 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.
 */
abstract contract AccessControl is Context, IAccessControl, ERC165 {
    struct RoleData {
        mapping(address => bool) members;
        bytes32 adminRole;
    }

    mapping(bytes32 => RoleData) private _roles;

    bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;

    /**
     * @dev Modifier that checks that an account has a specific role. Reverts
     * with a standardized message including the required role.
     *
     * The format of the revert reason is given by the following regular expression:
     *
     *  /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
     *
     * _Available since v4.1._
     */
    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 override returns (bool) {
        return _roles[role].members[account];
    }

    /**
     * @dev Revert with a standard message if `_msgSender()` is missing `role`.
     * Overriding this function changes the behavior of the {onlyRole} modifier.
     *
     * Format of the revert message is described in {_checkRole}.
     *
     * _Available since v4.6._
     */
    function _checkRole(bytes32 role) internal view virtual {
        _checkRole(role, _msgSender());
    }

    /**
     * @dev Revert with a standard message if `account` is missing `role`.
     *
     * The format of the revert reason is given by the following regular expression:
     *
     *  /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
     */
    function _checkRole(bytes32 role, address account) internal view virtual {
        if (!hasRole(role, account)) {
            revert(
                string(
                    abi.encodePacked(
                        "AccessControl: account ",
                        Strings.toHexString(uint160(account), 20),
                        " is missing role ",
                        Strings.toHexString(uint256(role), 32)
                    )
                )
            );
        }
    }

    /**
     * @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 override 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 override 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 override 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 `account`.
     *
     * May emit a {RoleRevoked} event.
     */
    function renounceRole(bytes32 role, address account) public virtual override {
        require(account == _msgSender(), "AccessControl: can only renounce roles for self");

        _revokeRole(role, account);
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event. Note that unlike {grantRole}, this function doesn't perform any
     * checks on the calling account.
     *
     * May emit a {RoleGranted} event.
     *
     * [WARNING]
     * ====
     * This function should only be called from the constructor when setting
     * up the initial roles for the system.
     *
     * Using this function in any other way is effectively circumventing the admin
     * system imposed by {AccessControl}.
     * ====
     *
     * NOTE: This function is deprecated in favor of {_grantRole}.
     */
    function _setupRole(bytes32 role, address account) internal virtual {
        _grantRole(role, account);
    }

    /**
     * @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 Grants `role` to `account`.
     *
     * Internal function without access restriction.
     *
     * May emit a {RoleGranted} event.
     */
    function _grantRole(bytes32 role, address account) internal virtual {
        if (!hasRole(role, account)) {
            _roles[role].members[account] = true;
            emit RoleGranted(role, account, _msgSender());
        }
    }

    /**
     * @dev Revokes `role` from `account`.
     *
     * Internal function without access restriction.
     *
     * May emit a {RoleRevoked} event.
     */
    function _revokeRole(bytes32 role, address account) internal virtual {
        if (hasRole(role, account)) {
            _roles[role].members[account] = false;
            emit RoleRevoked(role, account, _msgSender());
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (utils/Address.sol)

pragma solidity ^0.8.1;

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

        return account.code.length > 0;
    }

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

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

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

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

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

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

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

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

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

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

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

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

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

    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly
                /// @solidity memory-safe-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (utils/Base64.sol)

pragma solidity ^0.8.0;

/**
 * @dev Provides a set of functions to operate with Base64 strings.
 *
 * _Available since v4.5._
 */
library Base64 {
    /**
     * @dev Base64 Encoding/Decoding Table
     */
    string internal constant _TABLE = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";

    /**
     * @dev Converts a `bytes` to its Bytes64 `string` representation.
     */
    function encode(bytes memory data) internal pure returns (string memory) {
        /**
         * Inspired by Brecht Devos (Brechtpd) implementation - MIT licence
         * https://github.com/Brechtpd/base64/blob/e78d9fd951e7b0977ddca77d92dc85183770daf4/base64.sol
         */
        if (data.length == 0) return "";

        // Loads the table into memory
        string memory table = _TABLE;

        // Encoding takes 3 bytes chunks of binary data from `bytes` data parameter
        // and split into 4 numbers of 6 bits.
        // The final Base64 length should be `bytes` data length multiplied by 4/3 rounded up
        // - `data.length + 2`  -> Round up
        // - `/ 3`              -> Number of 3-bytes chunks
        // - `4 *`              -> 4 characters for each chunk
        string memory result = new string(4 * ((data.length + 2) / 3));

        /// @solidity memory-safe-assembly
        assembly {
            // Prepare the lookup table (skip the first "length" byte)
            let tablePtr := add(table, 1)

            // Prepare result pointer, jump over length
            let resultPtr := add(result, 32)

            // Run over the input, 3 bytes at a time
            for {
                let dataPtr := data
                let endPtr := add(data, mload(data))
            } lt(dataPtr, endPtr) {

            } {
                // Advance 3 bytes
                dataPtr := add(dataPtr, 3)
                let input := mload(dataPtr)

                // To write each character, shift the 3 bytes (18 bits) chunk
                // 4 times in blocks of 6 bits for each character (18, 12, 6, 0)
                // and apply logical AND with 0x3F which is the number of
                // the previous character in the ASCII table prior to the Base64 Table
                // The result is then added to the table to get the character to write,
                // and finally write it in the result pointer but with a left shift
                // of 256 (1 byte) - 8 (1 ASCII char) = 248 bits

                mstore8(resultPtr, mload(add(tablePtr, and(shr(18, input), 0x3F))))
                resultPtr := add(resultPtr, 1) // Advance

                mstore8(resultPtr, mload(add(tablePtr, and(shr(12, input), 0x3F))))
                resultPtr := add(resultPtr, 1) // Advance

                mstore8(resultPtr, mload(add(tablePtr, and(shr(6, input), 0x3F))))
                resultPtr := add(resultPtr, 1) // Advance

                mstore8(resultPtr, mload(add(tablePtr, and(input, 0x3F))))
                resultPtr := add(resultPtr, 1) // Advance
            }

            // When data `bytes` is not exactly 3 bytes long
            // it is padded with `=` characters at the end
            switch mod(mload(data), 3)
            case 1 {
                mstore8(sub(resultPtr, 1), 0x3d)
                mstore8(sub(resultPtr, 2), 0x3d)
            }
            case 2 {
                mstore8(sub(resultPtr, 1), 0x3d)
            }
        }

        return result;
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "./CharacterStats.sol";

contract CharacterActivity is CharacterStats {

// STATE VARIABLES

    /// @dev A mapping to track a characters activity
    mapping(uint256 => Activity) public charactersActivity;

// EVENTS

    event ActivityStatusUpdated(address indexed account, uint256 indexed tokenID, bool active);
    event ActivityStarted(address indexed account, uint256 indexed tokenID, Activity activity); 

// EXTERNAL FUNCTIONS

    /// @dev Update characters activity status
    /// @param tokenID Characters ID
    /// @param active the amount
    function _updateActivityStatus(uint256 tokenID, bool active)
        internal
    {
        // Write an event to the chain
        emit ActivityStatusUpdated(_msgSender(), tokenID, active);
        // Set active
        charactersActivity[tokenID].active = active;
        if (!active) {
            // Set block at which the activity completes
            charactersActivity[tokenID].completedBlock = block.number;
        }
    }

    /// @dev Update characters Activity Details
    /// @param tokenID Characters ID
    /// @param activity the activity details defined in the Activity struct
    function _startActivity(uint256 tokenID, Activity calldata activity)
        internal
    {
        require(activity.endBlock > activity.startBlock, "End block should be higher than start");
        // Write an event to the chain
        emit ActivityStarted(_msgSender(), tokenID, activity);
        // Set the activity details
        charactersActivity[tokenID] = activity;
    }

//VIEWS

    /// @dev PUBLIC: Blocks remaining in activity, returns 0 if finished
    /// @param tokenID Characters ID
    function getBlocksUntilActivityEnds(uint256 tokenID)
        external
        view
        returns (
                uint256 blocksRemaining
        )
    {
        // Shortcut to characters activity
        Activity storage activity = charactersActivity[tokenID];
        if (activity.endBlock > block.number) {
            return activity.endBlock - block.number;
        }
    }

}

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

import "@openzeppelin/contracts/token/ERC721/utils/ERC721Holder.sol";
import "./CollectionManager.sol";

contract CharacterManager is CollectionManager {

// STATE VARIABLES
   
    /// @dev A permanent mapping to track the the underlying collection & token to a hash of the collection address & wrappedTokenID
    /// @dev Hash of (collection & wrappedTokenID) >> WrappedToken(collection, wrappedTokenID)
    mapping (bytes32 => WrappedToken) public wrappedToken;

    /// @dev A mapping to track the wrapped token to the underlying collection & token
    /// @dev tokenID >> hash of the WrappedToken
    mapping (uint256 => bytes32) public wrappedTokenHashByID;

    /// @dev Maps the underlying token hash to the token id
    /// @dev Hash >> tokenID of the wrapped character
    mapping (bytes32 => uint256) public tokenIDByHash;
    
// EVENTS

    event Wrapped(address indexed account, address indexed collection, uint256 blockNumber, uint256 wrappedTokenID, uint256 tokenID, bytes32 wrappedTokenHash);
    event Unwrapped(address indexed account, address indexed collection, uint256 blockNumber, uint256 wrappedTokenID, uint256 tokenID, bytes32 wrappedTokenHash);

// FUNCTIONS

    /// @dev PUBLIC: Add an NFT to the contract
    /// @param collectionAddress the address of the collection
    /// @param wrappedTokenID the id of the NFT to wrap
    /// @param tokenID Characters ID
    function _wrap(address account, address collectionAddress, uint256 wrappedTokenID, uint256 tokenID)
        internal
        isRegistered(collectionAddress)
    {
        // Calculate the underlying token hash
        bytes32 wrappedTokenHash = hashWrappedToken(collectionAddress, wrappedTokenID);
        // If this character has not been wrapped previously then
        if (isNeverWrapped(collectionAddress, wrappedTokenID)) {
            // Add Collection address to the mapping
            wrappedToken[wrappedTokenHash].collectionAddress = collectionAddress;
            // Add Underlying Token ID to the mapping
            wrappedToken[wrappedTokenHash].wrappedTokenID = wrappedTokenID;
            // Map the wrapped token id to underlying token hash
            wrappedTokenHashByID[tokenID] = wrappedTokenHash;
            // Map the underlying token hash to the wrapped token id
            tokenIDByHash[wrappedTokenHash] = tokenID;
        }
        // Flag status as wrapped
        wrappedToken[wrappedTokenHash].status = WrappedStatus.Wrapped;
        // Write an event
        emit Wrapped(account, collectionAddress, block.number, wrappedTokenID, tokenID, wrappedTokenHash);
        // Transfer character to contract
        IERC721(collectionAddress).safeTransferFrom(account, address(this), wrappedTokenID);
    }

    /// @dev PUBLIC: Release an NFT from the contract
    /// @dev Relies on the Owner check being completed when the wrapped token is burned
    /// @param tokenID the id of the NFT to release
    function _unwrap(uint256 tokenID)
        internal
    {
        (address collectionAddress, uint256 wrappedTokenID, WrappedStatus status) = getWrappedTokenDetails(tokenID);
        // Ensure token is wrapped
        require(status == WrappedStatus.Wrapped, "There is no token to unwrap");
        // Calculate the underlying token hash
        bytes32 wrappedTokenHash = hashWrappedToken(collectionAddress, wrappedTokenID);
        // Flag status as unwrapped
        wrappedToken[wrappedTokenHash].status = WrappedStatus.Unwrapped;
        // Write an event
        emit Unwrapped(_msgSender(), collectionAddress, block.number, wrappedTokenID, tokenID, wrappedTokenHash);
        // Return Item to owner
        IERC721(collectionAddress).safeTransferFrom(address(this), _msgSender(), wrappedTokenID);
    }

// VIEW FUNCTIONS

    /// @dev Check mapping for wrapped character underlying token details
    /// @param tokenID Characters ID
    function getWrappedTokenDetails(uint256 tokenID)
        public
        view
        returns (
            address collectionAddress,
            uint256 wrappedTokenID,
            WrappedStatus status
            )
    {
        return (wrappedToken[wrappedTokenHashByID[tokenID]].collectionAddress,
                wrappedToken[wrappedTokenHashByID[tokenID]].wrappedTokenID,
                wrappedToken[wrappedTokenHashByID[tokenID]].status
                );
    }

    /// @dev Check if a token is wrapped
    /// @param collectionAddress the address of the collection
    /// @param wrappedTokenID the id of the NFT to release
    function isWrapped(address collectionAddress, uint256 wrappedTokenID)
        external
        view
        returns (
            bool tokenIsWrapped
            )
    {
        if (wrappedToken[hashWrappedToken(collectionAddress, wrappedTokenID)].status == WrappedStatus.Wrapped) {
            return (true);
        }
    }

    /// @dev Check if a token is wrapped
    /// @param collectionAddress the address of the collection
    /// @param wrappedTokenID the id of the NFT to release
    function isNeverWrapped(address collectionAddress, uint256 wrappedTokenID)
        public
        view
        returns (
            bool tokenNeverWrapped
            )
    {
        if (wrappedToken[hashWrappedToken(collectionAddress, wrappedTokenID)].status == WrappedStatus.NeverWrapped) {
            return (true);
        }
    }

    /// @dev Hash the underlying collection details
    /// @param collectionAddress the address of the collection
    /// @param wrappedTokenID the id of the NFT to release
    function hashWrappedToken(address collectionAddress, uint256 wrappedTokenID)
       public
       pure
       returns (
           bytes32 wrappedTokenHash
            )
    {
        wrappedTokenHash = keccak256(abi.encodePacked(collectionAddress, wrappedTokenID));
    }

}

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

import "@openzeppelin/contracts/utils/math/SafeCast.sol";
import "../characters/interfaces/IFarmlandCollectible.sol";
import "./CharacterManager.sol";

contract CharacterStats is CharacterManager {
    using SafeCast for uint256;

// STATE VARIABLES
   
    /// @dev Store the mapping for underlying characters to their stats
    mapping(bytes32 => uint16[]) public stats;
    
    /// @dev Stores the total number of stats boosted by tokenID
    mapping(uint256 => uint16) public getStatBoosted;

    /// @dev Stores the additional stats available to boost for each additional level
    uint16 public statsPerLevel = 3;

// EVENTS

    event StatIncreased(address indexed account, uint256 tokenID, uint256 amount, uint256 statIndex);
    event StatDecreased(address indexed account, uint256 tokenID, uint256 amount, uint256 statIndex);

// EXTERNAL FUNCTIONS

    /// @dev Increases a stat
    /// @param tokenID ID of the token
    /// @param amount to increase
    /// @param statIndex index of stat
    function _increaseStat(uint256 tokenID, uint256 amount, uint256 statIndex)
        internal
    {
        // Get the underlying token hash
        bytes32 wrappedTokenHash = wrappedTokenHashByID[tokenID];
        // Get current stat
        uint16 currentStat = stats[wrappedTokenHash][statIndex];
        // Set standard max stat
        uint16 maxStat = 99;
        if (statIndex == 5) {
            // Health has a different calculation for max stat
            maxStat = getMaxHealth(tokenID).toUint16();
        } else if (statIndex == 6) {
            // Morale has a different calculation for max stat
            maxStat = getMaxMorale(tokenID).toUint16();
        } else if (statIndex > 6) {
            // Experience has a higher max stat
            maxStat = 10000;
        }
        require(currentStat != maxStat, "Stat already at maximum");
        // Check to see if we'll go above the max stat value
        if (currentStat + amount.toUint16() < maxStat + 1) {
            // Increase stat
            stats[wrappedTokenHash][statIndex] += amount.toUint16();
        } else {
            // Set to max for the stat
            stats[wrappedTokenHash][statIndex] = maxStat;
        }
        // Write an event to the chain
        emit StatIncreased(_msgSender(), tokenID, amount, statIndex);
    }

    /// @dev Decreases a stat
    /// @param tokenID ID of the token
    /// @param amount to increase
    /// @param statIndex index of stat
    function _decreaseStat(uint256 tokenID, uint256 amount, uint256 statIndex)
        internal
    {
        // Get the underlying token hash
        bytes32 wrappedTokenHash = wrappedTokenHashByID[tokenID];
        // Get current stat
        uint16 currentStat = stats[wrappedTokenHash][statIndex];
        // Check to see if we'll go below the minimum stat of 1
        if (currentStat > amount.toUint16()) {
            // Decrease stat
            stats[wrappedTokenHash][statIndex] -= amount.toUint16();
        } else {
            // Otherwise set to minimum of 1
            stats[wrappedTokenHash][statIndex] = 1;
        }
        // Write an event to the chain
        emit StatDecreased(_msgSender(), tokenID, amount, statIndex);
    }

    /// @dev Set characters stat to an arbitrary amount
    /// @dev if amount = stat then there's no change
    /// @param tokenID Characters ID
    /// @param amount to add
    function _setStatTo(uint256 tokenID, uint256 amount, uint256 statIndex)
        internal
    {
        // Get the underlying token hash
        bytes32 wrappedTokenHash = wrappedTokenHashByID[tokenID];
        // Get current stat
        uint16 currentStat = stats[wrappedTokenHash][statIndex];
        if (amount.toUint16() > currentStat) {
            _increaseStat(tokenID, amount.toUint16() - currentStat, statIndex);
        } else {
            _decreaseStat(tokenID, currentStat - amount, statIndex);
        }
    }

    /// @dev Boost stats based on level, enables character progression
    /// @param tokenID Characters ID
    /// @param amount amount to increase stat
    /// @param statIndex which stat to increase
    function _boostStat(uint256 tokenID, uint256 amount, uint256 statIndex)
        internal
    {
        // Ensure that only static stats can be increased
        require(statIndex < 5, "Invalid Stat");
        // Ensure that the max stat boost won't be exceeded
        require(amount <= getStatBoostAvailable(tokenID), "This will exceed the available boosts for this character");
        // Increase the state variable tracking the boosts
        getStatBoosted[tokenID] += amount.toUint16();
        // Increase requested Stat
        _increaseStat(tokenID, amount ,statIndex);
    }

// INTERNAL FUNCTIONS

    /// @dev Import or generate character stats
    /// @param collectionAddress the address of the collection
    /// @param wrappedTokenID the id of the NFT to release
    function _storeStats(address collectionAddress, uint256 wrappedTokenID)
        internal
        isRegistered(collectionAddress)
    {
        uint256 stamina; uint256 strength; uint256 speed; uint256 courage; uint256 intelligence; uint256 health; uint256 morale;
        // Calculate the  underlying token hash
        bytes32 wrappedTokenHash = hashWrappedToken(collectionAddress, wrappedTokenID);
        // Ensure the stats haven't previously been generated
        require(stats[wrappedTokenHash].length == 0, "Traits can be created once");
        // If collection is native
        if (characterCollections[collectionAddress].native) {
            // Get Native Character stats
            (, stamina, strength, speed, courage, intelligence) = IFarmlandCollectible(collectionAddress).collectibleTraits(wrappedTokenID);
        } else  {
            // Otherwise generate some random stats
            uint256 range = characterCollections[collectionAddress].range;
            uint256 offset = characterCollections[collectionAddress].offset;
            // Define array to store random numbers
            uint256[] memory randomNumbers = new uint256[](5);
            randomNumbers = _getRandomNumbers(5, wrappedTokenID);
            // Set stat values
            stamina = (randomNumbers[0] % range) + offset;
            strength = (randomNumbers[1] % range) + offset;
            speed = (randomNumbers[2] % range) + offset;
            courage = (randomNumbers[3] % range) + offset;
            intelligence = (randomNumbers[4] % range) + offset;
        }
        // Calculate health
        health = (strength + stamina) / 2;
        // Give bonus for a Tank or Warrior
        if (strength > 95 || stamina > 95)
        {
            health += health / 2;
        }
        // Calculate morale
        morale = (courage + intelligence) / 2 ;
        // Give bonus for a Genius or Hero
        if (courage > 95 || intelligence > 95)
        {
            morale += morale / 2;
        }
        // Assign the stats (experience & level start at 0)
        stats[wrappedTokenHash] = [
            stamina.toUint16(),       // 0
            strength.toUint16(),      // 1
            speed.toUint16(),         // 2
            courage.toUint16(),       // 3
            intelligence.toUint16(),  // 4
            health.toUint16(),        // 5
            morale.toUint16(),        // 6
            0];                       // 7 - experience
    }

    /// @dev Returns an array of Random Numbers
    /// @param n number of random numbers to generate
    /// @param salt a number that adds to randomness
    function _getRandomNumbers(uint256 n, uint256 salt)
        internal
        view
        returns (uint256[] memory randomNumbers)
    {
        randomNumbers = new uint256[](n);
        for (uint256 i = 0; i < n;) {
            randomNumbers[i] = uint256(keccak256(abi.encodePacked(block.timestamp, salt, i)));
            unchecked { i++; }
        }
    }

// ADMIN FUNCTIONS
    
    /// @dev Update the base stats per level
    function updateStatsPerLevel(uint256 newStatsPerLevel)
        external
        onlyOwner
    {
        statsPerLevel = newStatsPerLevel.toUint16();
    }

// VIEW FUNCTIONS

    /// @dev Returns the wrapped characters extended stats
    /// @param tokenID ID of the token
    function getStats(uint256 tokenID)
        public
        view
        returns (
            uint256 stamina, uint256 strength, uint256 speed, uint256 courage, uint256 intelligence, uint256 health, uint256 morale, uint256 experience, uint256 level
        )
    {
        // Get the underlying token hash
        bytes32 wrappedTokenHash = wrappedTokenHashByID[tokenID];
        uint256 total = stats[wrappedTokenHash].length;
        if (total > 7) {
            stamina = stats[wrappedTokenHash][0];
            strength = stats[wrappedTokenHash][1];
            speed = stats[wrappedTokenHash][2];
            courage = stats[wrappedTokenHash][3];
            intelligence = stats[wrappedTokenHash][4];
            health = stats[wrappedTokenHash][5];
            morale = stats[wrappedTokenHash][6];
            experience = stats[wrappedTokenHash][7];
            level = sqrt(experience);
        } else {
            return (0,0,0,0,0,0,0,0,0);
        }
    }  

    /// @dev Returns the wrapped characters level
    /// @param tokenID ID of the token
    function getLevel(uint256 tokenID)
        public
        view
        returns (
            uint256 level
        )
    {
        // Get the underlying token hash
        bytes32 wrappedTokenHash = wrappedTokenHashByID[tokenID];
        // Level is the square root of Experience
        return sqrt(stats[wrappedTokenHash][7]);
    }  
    
    /// @dev Returns the square root of a number
    /// @dev https://github.com/Uniswap/uniswap-v2-core/blob/4dd59067c76dea4a0e8e4bfdda41877a6b16dedc/contracts/libraries/Math.sol#L11-L22
    function sqrt(uint256 y) 
        internal
        pure
        returns (
            uint256 z
        )
    {
        if (y > 3) {
            z = y;
            uint x = y / 2 + 1;
            while (x < z) {
                z = x;
                x = (y / x + x) / 2;
            }
        } else if (y != 0) {
            z = 1;
        }
    }

    /// @dev Returns a characters default max health
    /// @param tokenID Characters ID
    function getMaxHealth(uint256 tokenID)
        public
        view
        returns (
            uint256 health
        )
    {
        // Retrieve stats
        (uint256 stamina, uint256 strength,,,,,,,) = getStats(tokenID);
        // Calculate the characters health
        health = (strength + stamina) / 2;
        // Bonus for Tank or Warrior
        if (strength > 95 || stamina > 95)
        {
            health += health / 2;
        }
    }

    /// @dev Return a default max morale .. a combination of courage & intelligence
    /// @param tokenID Characters ID
    function getMaxMorale(uint256 tokenID)
        public
        view
        returns (
            uint256 morale
        )
    {
        // Retrieve stats
        (,,,uint256 courage, uint256 intelligence,,,,) = getStats(tokenID);
        // Set Morale
        morale = (courage + intelligence) / 2 ;
        // Bonus for Genius or Hero
        if (courage > 95 || intelligence > 95)
        {
            morale += morale / 2;
        }
    }

    /// @dev Return the stat boost available for a character
    /// @param tokenID Characters ID
    function getStatBoostAvailable(uint256 tokenID)
        public
        view
        returns (uint256 statBoost)
    {
        return (getLevel(tokenID) * statsPerLevel) - getStatBoosted[tokenID];
    }

}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "./interfaces/IWrappedCharacters.sol";
import "../utils/Permissioned.sol";

contract CollectionManager is Permissioned {

// CONSTRUCTOR

    constructor () Permissioned() {}

// STATE VARIABLES

    /// @dev Create an array to track the Character collections
    mapping(address => Collection) public characterCollections;

// MODIFIERS

    /// @dev Check if the collection is wrappable
    /// @param collectionAddress address of collection
    modifier isRegistered(address collectionAddress) {
        require(isCollectionEnabled(collectionAddress) || collectionAddress == address(this),"This collection is not registered");
        _;
    }

    /// @dev Check if the collection is wrappable
    /// @param collectionAddress address of collection
    modifier isWrappable(address collectionAddress) {
        require(isCollectionEnabled(collectionAddress) && collectionAddress != address(this),"This collection is not wrappable");
        _;
    }

// EVENTS
    event CollectionEnabled(address indexed account, address collectionAddress, bool native, uint256 range, uint256 offset);
    event CollectionDisabled(address indexed account, address collectionAddress);

// FUNCTIONS

    /// @dev Enables a NFT collection to be wrapped
    /// @param collectionAddress address of the NFT collection
    /// @param native is this a native Farmland NFT collection
    /// @param range the max range for non native stats i.e, when added to the offset the range gives the maximum stat
    /// @param offset the offset for not native stats i.e., the floor for stats
    function enableCollection(address collectionAddress, bool native, uint256 range, uint256 offset)
        external
        onlyOwner
    {
        // Flag if collection is native to farmland
        characterCollections[collectionAddress].native = native;
        // Add range to the collection mapping
        characterCollections[collectionAddress].range = range;
        // Add offset to the collection mapping
        characterCollections[collectionAddress].offset = offset;
        emit CollectionEnabled(_msgSender(), collectionAddress, native, range, offset);
    }

    /// @dev Disables a NFT collection from being wrapped
    /// @param collectionAddress address of the NFT collection
    function disableCollection(address collectionAddress)
        external
        onlyOwner
    {
        // Delete the mapping
        delete characterCollections[collectionAddress];
        emit CollectionDisabled(_msgSender(), collectionAddress);
    }

// VIEWS

    /// @dev Is a NFT collection enabled for wrapping
    /// @param collectionAddress address of the NFT collection
    function isCollectionEnabled(address collectionAddress)
        public
        view
        returns (
            bool enabled
        )
    {
        if (characterCollections[collectionAddress].range > 0) {
            return true;
        }
    }

}

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

pragma solidity ^0.8.0;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)

pragma solidity ^0.8.0;

import "./IERC165.sol";

/**
 * @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);
 * }
 * ```
 *
 * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
 */
abstract contract ERC165 is IERC165 {
    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IERC165).interfaceId;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (token/ERC721/ERC721.sol)

pragma solidity ^0.8.0;

import "./IERC721.sol";
import "./IERC721Receiver.sol";
import "./extensions/IERC721Metadata.sol";
import "../../utils/Address.sol";
import "../../utils/Context.sol";
import "../../utils/Strings.sol";
import "../../utils/introspection/ERC165.sol";

/**
 * @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}.
 */
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
    using Address for address;
    using Strings for uint256;

    // Token name
    string private _name;

    // Token symbol
    string private _symbol;

    // Mapping from token ID to owner address
    mapping(uint256 => address) private _owners;

    // Mapping owner address to token count
    mapping(address => uint256) private _balances;

    // Mapping from token ID to approved address
    mapping(uint256 => address) private _tokenApprovals;

    // Mapping from owner to operator approvals
    mapping(address => mapping(address => 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 override returns (uint256) {
        require(owner != address(0), "ERC721: address zero is not a valid owner");
        return _balances[owner];
    }

    /**
     * @dev See {IERC721-ownerOf}.
     */
    function ownerOf(uint256 tokenId) public view virtual override returns (address) {
        address owner = _owners[tokenId];
        require(owner != address(0), "ERC721: invalid token ID");
        return owner;
    }

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

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

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

        string memory baseURI = _baseURI();
        return bytes(baseURI).length > 0 ? string(abi.encodePacked(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 override {
        address owner = ERC721.ownerOf(tokenId);
        require(to != owner, "ERC721: approval to current owner");

        require(
            _msgSender() == owner || isApprovedForAll(owner, _msgSender()),
            "ERC721: approve caller is not token owner nor approved for all"
        );

        _approve(to, tokenId);
    }

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

        return _tokenApprovals[tokenId];
    }

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

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

    /**
     * @dev See {IERC721-transferFrom}.
     */
    function transferFrom(
        address from,
        address to,
        uint256 tokenId
    ) public virtual override {
        //solhint-disable-next-line max-line-length
        require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: caller is not token owner nor approved");

        _transfer(from, to, tokenId);
    }

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

    /**
     * @dev See {IERC721-safeTransferFrom}.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId,
        bytes memory data
    ) public virtual override {
        require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: caller is not token owner nor approved");
        _safeTransfer(from, to, tokenId, data);
    }

    /**
     * @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.
     *
     * `data` is additional data, it has no specified format and it is sent in call to `to`.
     *
     * This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
     * implement alternative mechanisms to perform token transfer, such as signature-based.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - 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,
        bytes memory data
    ) internal virtual {
        _transfer(from, to, tokenId);
        require(_checkOnERC721Received(from, to, tokenId, data), "ERC721: transfer to non ERC721Receiver implementer");
    }

    /**
     * @dev Returns whether `tokenId` exists.
     *
     * Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
     *
     * Tokens start existing when they are minted (`_mint`),
     * and stop existing when they are burned (`_burn`).
     */
    function _exists(uint256 tokenId) internal view virtual returns (bool) {
        return _owners[tokenId] != address(0);
    }

    /**
     * @dev Returns whether `spender` is allowed to manage `tokenId`.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
        address owner = ERC721.ownerOf(tokenId);
        return (spender == owner || isApprovedForAll(owner, spender) || getApproved(tokenId) == spender);
    }

    /**
     * @dev Safely mints `tokenId` and transfers it to `to`.
     *
     * 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 virtual {
        _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);
        require(
            _checkOnERC721Received(address(0), to, tokenId, data),
            "ERC721: transfer to non ERC721Receiver implementer"
        );
    }

    /**
     * @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 virtual {
        require(to != address(0), "ERC721: mint to the zero address");
        require(!_exists(tokenId), "ERC721: token already minted");

        _beforeTokenTransfer(address(0), to, tokenId);

        _balances[to] += 1;
        _owners[tokenId] = to;

        emit Transfer(address(0), to, tokenId);

        _afterTokenTransfer(address(0), to, tokenId);
    }

    /**
     * @dev Destroys `tokenId`.
     * The approval is cleared when the token is burned.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     *
     * Emits a {Transfer} event.
     */
    function _burn(uint256 tokenId) internal virtual {
        address owner = ERC721.ownerOf(tokenId);

        _beforeTokenTransfer(owner, address(0), tokenId);

        // Clear approvals
        _approve(address(0), tokenId);

        _balances[owner] -= 1;
        delete _owners[tokenId];

        emit Transfer(owner, address(0), tokenId);

        _afterTokenTransfer(owner, address(0), 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 virtual {
        require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer from incorrect owner");
        require(to != address(0), "ERC721: transfer to the zero address");

        _beforeTokenTransfer(from, to, tokenId);

        // Clear approvals from the previous owner
        _approve(address(0), tokenId);

        _balances[from] -= 1;
        _balances[to] += 1;
        _owners[tokenId] = to;

        emit Transfer(from, to, tokenId);

        _afterTokenTransfer(from, to, tokenId);
    }

    /**
     * @dev Approve `to` to operate on `tokenId`
     *
     * Emits an {Approval} event.
     */
    function _approve(address to, uint256 tokenId) internal virtual {
        _tokenApprovals[tokenId] = to;
        emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
    }

    /**
     * @dev Approve `operator` to operate on all of `owner` tokens
     *
     * Emits an {ApprovalForAll} event.
     */
    function _setApprovalForAll(
        address owner,
        address operator,
        bool approved
    ) internal virtual {
        require(owner != operator, "ERC721: approve to caller");
        _operatorApprovals[owner][operator] = approved;
        emit ApprovalForAll(owner, operator, approved);
    }

    /**
     * @dev Reverts if the `tokenId` has not been minted yet.
     */
    function _requireMinted(uint256 tokenId) internal view virtual {
        require(_exists(tokenId), "ERC721: invalid token ID");
    }

    /**
     * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
     * 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
     * @return bool whether the call correctly returned the expected magic value
     */
    function _checkOnERC721Received(
        address from,
        address to,
        uint256 tokenId,
        bytes memory data
    ) private returns (bool) {
        if (to.isContract()) {
            try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, data) returns (bytes4 retval) {
                return retval == IERC721Receiver.onERC721Received.selector;
            } catch (bytes memory reason) {
                if (reason.length == 0) {
                    revert("ERC721: transfer to non ERC721Receiver implementer");
                } else {
                    /// @solidity memory-safe-assembly
                    assembly {
                        revert(add(32, reason), mload(reason))
                    }
                }
            }
        } else {
            return true;
        }
    }

    /**
     * @dev Hook that is called before any token transfer. This includes minting
     * and burning.
     *
     * Calling conditions:
     *
     * - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
     * transferred to `to`.
     * - When `from` is zero, `tokenId` will be minted for `to`.
     * - When `to` is zero, ``from``'s `tokenId` will be burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 tokenId
    ) internal virtual {}

    /**
     * @dev Hook that is called after any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _afterTokenTransfer(
        address from,
        address to,
        uint256 tokenId
    ) internal virtual {}
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/utils/ERC721Holder.sol)

pragma solidity ^0.8.0;

import "../IERC721Receiver.sol";

/**
 * @dev Implementation of the {IERC721Receiver} interface.
 *
 * Accepts all token transfers.
 * Make sure the contract is able to use its token with {IERC721-safeTransferFrom}, {IERC721-approve} or {IERC721-setApprovalForAll}.
 */
contract ERC721Holder is IERC721Receiver {
    /**
     * @dev See {IERC721Receiver-onERC721Received}.
     *
     * Always returns `IERC721Receiver.onERC721Received.selector`.
     */
    function onERC721Received(
        address,
        address,
        uint256,
        bytes memory
    ) public virtual override returns (bytes4) {
        return this.onERC721Received.selector;
    }
}

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

pragma solidity ^0.8.0;

/**
 * @dev External interface of AccessControl declared to support ERC165 detection.
 */
interface IAccessControl {
    /**
     * @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.
     *
     * _Available since v3.1._
     */
    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 `account`.
     */
    function renounceRole(bytes32 role, address account) external;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[EIP].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165 {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (token/ERC721/IERC721.sol)

pragma solidity ^0.8.0;

import "../../utils/introspection/IERC165.sol";

/**
 * @dev Required interface of an ERC721 compliant contract.
 */
interface IERC721 is IERC165 {
    /**
     * @dev Emitted when `tokenId` token is transferred from `from` to `to`.
     */
    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
     */
    event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
     */
    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);

    /**
     * @dev Returns the number of tokens in ``owner``'s account.
     */
    function balanceOf(address owner) external view returns (uint256 balance);

    /**
     * @dev Returns the owner of the `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function ownerOf(uint256 tokenId) external view returns (address owner);

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`.
     *
     * 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: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external;

    /**
     * @dev Gives permission to `to` to transfer `tokenId` token to another account.
     * The approval is cleared when the token is transferred.
     *
     * Only a single account can be approved at a time, so approving the zero address clears previous approvals.
     *
     * Requirements:
     *
     * - The caller must own the token or be an approved operator.
     * - `tokenId` must exist.
     *
     * Emits an {Approval} event.
     */
    function approve(address to, uint256 tokenId) external;

    /**
     * @dev Approve or remove `operator` as an operator for the caller.
     * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
     *
     * Requirements:
     *
     * - The `operator` cannot be the caller.
     *
     * Emits an {ApprovalForAll} event.
     */
    function setApprovalForAll(address operator, bool _approved) external;

    /**
     * @dev Returns 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);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC721/extensions/IERC721Enumerable.sol)

pragma solidity ^0.8.0;

import "../IERC721.sol";

/**
 * @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);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)

pragma solidity ^0.8.0;

import "../IERC721.sol";

/**
 * @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);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721Receiver.sol)

pragma solidity ^0.8.0;

/**
 * @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);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol";

struct CollectibleTraits {uint256 expiryDate; uint256 trait1; uint256 trait2; uint256 trait3; uint256 trait4; uint256 trait5;}
struct CollectibleSlots {uint256 slot1; uint256 slot2; uint256 slot3; uint256 slot4; uint256 slot5; uint256 slot6; uint256 slot7; uint256 slot8;}

abstract contract IFarmlandCollectible is IERC721Enumerable, IERC721Metadata {

     /// @dev Stores the key traits for Farmland Collectibles
    mapping(uint256 => CollectibleTraits) public collectibleTraits;
    /// @dev Stores slots for Farmland Collectibles, can be used to store various items / awards for collectibles
    mapping(uint256 => CollectibleSlots) public collectibleSlots;
    function setCollectibleSlot(uint256 id, uint256 slotIndex, uint256 slot) external virtual;
    function walletOfOwner(address account) external view virtual returns(uint256[] memory tokenIds);

}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol";

enum WrappedStatus {NeverWrapped, Wrapped, Unwrapped}
struct Collection {bool native; uint256 range; uint256 offset;}
struct WrappedToken {address collectionAddress; uint256 wrappedTokenID; WrappedStatus status;}
struct Activity {bool active; uint256 numberOfActivities; uint256 activityDuration; uint256 startBlock; uint256 endBlock; uint256 completedBlock;}

abstract contract IWrappedCharacters is IERC721 {
    mapping(bytes32 => uint16[]) public stats;
    mapping (uint256 => Activity) public charactersActivity;
    mapping (bytes32 => WrappedToken) public wrappedToken;
    mapping (uint256 => bytes32) public wrappedTokenHashByID;
    mapping (bytes32 => uint256) public tokenIDByHash;
    mapping(uint256 => uint16) public getStatBoosted;
    function wrap(uint256 wrappedTokenID, address collectionAddress) external virtual;
    function unwrap(uint256 tokenID) external virtual;
    function updateActivityStatus(uint256 tokenID, bool active) external virtual;
    function startActivity(uint256 tokenID, Activity calldata activity) external virtual;
    function setStatTo(uint256 tokenID, uint256 amount, uint256 statIndex) external virtual;
    function increaseStat(uint256 tokenID, uint256 amount, uint256 statIndex) external virtual;
    function decreaseStat(uint256 tokenID, uint256 amount, uint256 statIndex) external virtual;
    function boostStat(uint256 tokenID, uint256 amount, uint256 statIndex)external virtual;
    function getBlocksUntilActivityEnds(uint256 tokenID) external virtual view returns (uint256 blocksRemaining);
    function getMaxHealth(uint256 tokenID) external virtual view returns (uint256 health);
    function getStats(uint256 tokenID) external virtual view returns (uint256 stamina, uint256 strength, uint256 speed, uint256 courage, uint256 intelligence, uint256 health, uint256 morale, uint256 experience, uint256 level);
    function getLevel(uint256 tokenID) external virtual view returns (uint256 level);
    function hashWrappedToken(address collectionAddress, uint256 wrappedTokenID) external virtual pure returns (bytes32 wrappedTokenHash);
    function isWrapped(address collectionAddress, uint256 wrappedTokenID) external virtual view returns (bool tokenExists);
    function getWrappedTokenDetails(uint256 tokenID) external virtual view returns (address collectionAddress, uint256 wrappedTokenID, WrappedStatus status);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/utils/Strings.sol";
import "@openzeppelin/contracts/utils/Base64.sol";
import "./WrappedCharacters.sol";

contract Mercenaries is WrappedCharacters {
    using Strings for uint256;

    constructor (
        string memory _initialBaseURI
    )
    WrappedCharacters("Farmland Mercenaries", "MERCENARIES") {
        // Set the starting BaseURI
        baseURI = _initialBaseURI;
    }

// STATE VARIABLES

    /// @dev For tracking the mercenaries visual traits
    mapping (uint256 => bytes16[]) public visualTraits;
    
// EVENTS

    event MercenaryMinted(address indexed account, uint256 indexed tokenID, bytes16[] traits);
    event MercenaryTraitsUpdated(address indexed account, uint256 indexed tokenID, bytes16[] traits);

// FUNCTIONS

    /// @dev Allow an external contract to mint a mercenary
    /// @dev Enables giveaways to supportive community members
    /// @dev Enables external contracts with permission to mint mercenaries for promotions
    /// @param to recipient
    /// @param traits an array representing the mercenaries traits e.g., ["blue hat","brown eyes]
    function mint(address to, bytes16[] calldata traits)
        external
        nonReentrant
        onlyAllowed
    {
        // Increment wrapped token id
        unchecked { totalTokens++; }
        // Store the totalTokens as a local variable
        uint256 tokenID = totalTokens;
        // Write an event
        emit MercenaryMinted(to, tokenID, traits);
        // Set the stats
        _storeStats(address(this),tokenID);
        // Calculate the underlying token hash
        bytes32 wrappedTokenHash = hashWrappedToken(address(this), tokenID);
        // Add Collection address to the mapping
        wrappedToken[wrappedTokenHash].collectionAddress = address(this);
        // Add Token ID to the mapping
        wrappedToken[wrappedTokenHash].wrappedTokenID = tokenID;
        // Map the underlying token hash to the wrapped token id
        wrappedTokenHashByID[tokenID] = wrappedTokenHash;
        // Add Visual Traits for mercenary
        visualTraits[tokenID] = traits;
        // Mint the Mercenaries
        _mint(to, tokenID);
    }

    /// @dev Replace traits
    /// @param tokenID of mercenary
    /// @param traits an array representing the mercenaries traits e.g., [7,2,5,1,1]
    function updateTraits(uint256 tokenID, bytes16[] calldata traits)
        external
        nonReentrant
        onlyAllowed
        onlyExists(tokenID)
    {
        // Write an event
        emit MercenaryTraitsUpdated(_msgSender(), tokenID, traits);
        // Replace Visual Traits for mercenary
        visualTraits[tokenID] = traits;
    }

// VIEWS

    /// @dev Return the token onchain metadata
    /// @param tokenID Identifies the asset
    function tokenURI(uint256 tokenID)
        public
        view
        virtual
        override(ERC721)
        onlyExists(tokenID)
        returns (string memory uri) 
    {
        (address collectionAddress,uint256 wrappedTokenID,) = getWrappedTokenDetails(tokenID);
        if (collectionAddress == address(this)) {
            bytes32 wrappedTokenHash = hashWrappedToken(collectionAddress, wrappedTokenID);
            uint256 level = getLevel(tokenID);
            string memory _url = ERC721.tokenURI(tokenID);
            string memory url = string(abi.encodePacked(_url,".png"));
            string memory mercenaryName = string(abi.encodePacked("Mercenary #",Strings.toString(tokenID)));
            string memory json1 = string(abi.encodePacked(
                '{',
                '"name": "', mercenaryName, '",',
                '"description": "Mercenaries are available to hire for various activities",',
                '"image": "', url, '",',
                '"seller_fee_basis_points": 100,',
                '"fee_recipient": "0xC74956f14b1C0F5057404A8A26D3074924545dF8",',
                '"attributes": [',
                '{ "id": 0, "trait_type": "Level", "value": "'      ,Strings.toString(level),    '" },'
            ));
            string memory output = Base64.encode(abi.encodePacked(json1, encodeTraits(tokenID), encodeStats(wrappedTokenHash)));
            return string(abi.encodePacked('data:application/json;base64,', output));   // Return the result
        } else {
            return IERC721Metadata(collectionAddress).tokenURI(wrappedTokenID);
        }
    }

    function encodeTraits(uint256 tokenID)
        internal
        view
        returns (string memory)
    {
        bytes16[] memory traits = visualTraits[tokenID];
        string memory json1 = string(abi.encodePacked(
            '{ "id": 0, "trait_type": "Background", "value": "' ,_bytes16ToString(traits[0]), '" },',
            '{ "id": 0, "trait_type": "Base", "value": "'       ,_bytes16ToString(traits[1]), '" },',
            '{ "id": 0, "trait_type": "Gender", "value": "'     ,_bytes16ToString(traits[2]), '" },',
            '{ "id": 0, "trait_type": "Hair", "value": "'       ,_bytes16ToString(traits[3]), '" },'
        ));
        string memory json2 = string(abi.encodePacked(
            '{ "id": 0, "trait_type": "Eyes", "value": "'       ,_bytes16ToString(traits[4]), '" },',
            '{ "id": 0, "trait_type": "Mouth", "value": "'      ,_bytes16ToString(traits[5]), '" },',
            '{ "id": 0, "trait_type": "Clothing", "value": "'   ,_bytes16ToString(traits[6]), '" },',
            '{ "id": 0, "trait_type": "Feature", "value": "'    ,_bytes16ToString(traits[7]), '" },'
        ));
        return string(abi.encodePacked(json1, json2));   // Return the result
    }

    function encodeStats(bytes32 wrappedTokenHash)
        internal
        view
        returns (string memory)
    {
        uint16[] memory stat = stats[wrappedTokenHash];
        string memory json1 = string(abi.encodePacked(
            '{ "id": 0, "trait_type": "Stamina", "value": "'        ,Strings.toString(stat[0]), '" },',
            '{ "id": 0, "trait_type": "Strength", "value": "'       ,Strings.toString(stat[1]), '" },',
            '{ "id": 0, "trait_type": "Speed", "value": "'          ,Strings.toString(stat[2]), '" },',
            '{ "id": 0, "trait_type": "Courage", "value": "'        ,Strings.toString(stat[3]), '" },'
        ));
        string memory json2 = string(abi.encodePacked(
            '{ "id": 0, "trait_type": "Intelligence", "value": "'   ,Strings.toString(stat[4]), '" },',
            '{ "id": 0, "trait_type": "Health", "value": "'         ,Strings.toString(stat[5]), '" },',
            '{ "id": 0, "trait_type": "Morale", "value": "'         ,Strings.toString(stat[6]), '" },',
            '{ "id": 0, "trait_type": "Experience", "value": "'     ,Strings.toString(stat[7]), '" }',
            ']',
            '}'
        ));
        return string(abi.encodePacked(json1, json2));   // Return the result
    }

    function _bytes16ToString(bytes16 toConvert) 
        private
        pure
        returns (string memory) 
    {
        uint8 i = 0;
        while(i < 16 && toConvert[i] != 0) {
            unchecked { i++; }
        }
        bytes memory bytesArray = new bytes(i);
        for (i = 0; i < 16 && toConvert[i] != 0;) {
            bytesArray[i] = toConvert[i];
            unchecked { i++; }
        }
        return string(bytesArray);
    }

    function _baseURI() 
        internal
        view
        override(ERC721)
        returns (string memory)
    {
        return baseURI;
    }

    /// @dev Check if token is a mercenary
    /// @param tokenID Identifies the asset
    function isMercenary(uint256 tokenID)
        external
        view
        onlyExists(tokenID)
        returns (bool mercenary)
    {
        (address collectionAddress,,) = getWrappedTokenDetails(tokenID);
        if (collectionAddress == address(this)) {return true;}
    }

    /// @dev Check if mercenary is a wrapped citizen
    /// @param tokenID Identifies the asset
    function isCitizen(uint256 tokenID)
        external
        view
        onlyExists(tokenID)
        returns (bool citizen)
    {
        (address collectionAddress,,) = getWrappedTokenDetails(tokenID);
        if (characterCollections[collectionAddress].native && collectionAddress != address(this)) {return true;}
    }

    /// @dev The following functions are overrides required by Solidity.
    function _beforeTokenTransfer(address from, address to, uint256 tokenId)
        internal
        override(ERC721)
    {
        super._beforeTokenTransfer(from, to, tokenId);
        // Revert if the mercenary is active
        require(!charactersActivity[tokenId].active, "Mercenary is active");
    }

}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/access/AccessControl.sol";

contract Permissioned is AccessControl {

    constructor () {
            _setupRole(DEFAULT_ADMIN_ROLE, _msgSender());
        }

// STATE VARIABLES

    /// @dev Defines the accessible roles
    bytes32 public constant ACCESS_ROLE = keccak256("ACCESS_ROLE");

// MODIFIERS

    /// @dev Only allows admin accounts
    modifier onlyOwner() {
        require(hasRole(DEFAULT_ADMIN_ROLE, _msgSender()), "Caller is not the owner");
        _; // Call the actual code
    }

    /// @dev Only allows accounts with permission
    modifier onlyAllowed() {
        require(hasRole(ACCESS_ROLE, _msgSender()), "Caller does not have permission");
        _; // Call the actual code
    }

// FUNCTIONS

  /// @dev Add an account to the access role. Restricted to admins.
  function addAllowed(address account)
    external virtual onlyOwner
  {
    grantRole(ACCESS_ROLE, account);
  }

  /// @dev Add an account to the admin role. Restricted to admins.
  function addOwner(address account)
    public virtual onlyOwner
  {
    grantRole(DEFAULT_ADMIN_ROLE, account);
  }

  /// @dev Remove an account from the access role. Restricted to admins.
  function removeAllowed(address account)
    external virtual onlyOwner
  {
    revokeRole(ACCESS_ROLE, account);
  }

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

  /// @dev Remove oneself from the owner role.
  function renounceOwner()
    public virtual
  {
    renounceRole(DEFAULT_ADMIN_ROLE, _msgSender());
  }

// VIEWS

  /// @dev Return `true` if the account belongs to the admin role.
  function isOwner(address account)
    external virtual view returns (bool)
  {
    return hasRole(DEFAULT_ADMIN_ROLE, account);
  }

  /// @dev Return `true` if the account belongs to the access role.
  function isAllowed(address account)
    external virtual view returns (bool)
  {
    return hasRole(ACCESS_ROLE, account);
  }

}

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

pragma solidity ^0.8.0;

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

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

    uint256 private _status;

    constructor() {
        _status = _NOT_ENTERED;
    }

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

        // Any calls to nonReentrant after this point will fail
        _status = _ENTERED;

        _;

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (utils/math/SafeCast.sol)

pragma solidity ^0.8.0;

/**
 * @dev Wrappers over Solidity's uintXX/intXX casting operators with added overflow
 * checks.
 *
 * Downcasting from uint256/int256 in Solidity does not revert on overflow. This can
 * easily result in undesired exploitation or bugs, since developers usually
 * assume that overflows raise errors. `SafeCast` restores this intuition by
 * reverting the transaction when such an operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 *
 * Can be combined with {SafeMath} and {SignedSafeMath} to extend it to smaller types, by performing
 * all math on `uint256` and `int256` and then downcasting.
 */
library SafeCast {
    /**
     * @dev Returns the downcasted uint248 from uint256, reverting on
     * overflow (when the input is greater than largest uint248).
     *
     * Counterpart to Solidity's `uint248` operator.
     *
     * Requirements:
     *
     * - input must fit into 248 bits
     *
     * _Available since v4.7._
     */
    function toUint248(uint256 value) internal pure returns (uint248) {
        require(value <= type(uint248).max, "SafeCast: value doesn't fit in 248 bits");
        return uint248(value);
    }

    /**
     * @dev Returns the downcasted uint240 from uint256, reverting on
     * overflow (when the input is greater than largest uint240).
     *
     * Counterpart to Solidity's `uint240` operator.
     *
     * Requirements:
     *
     * - input must fit into 240 bits
     *
     * _Available since v4.7._
     */
    function toUint240(uint256 value) internal pure returns (uint240) {
        require(value <= type(uint240).max, "SafeCast: value doesn't fit in 240 bits");
        return uint240(value);
    }

    /**
     * @dev Returns the downcasted uint232 from uint256, reverting on
     * overflow (when the input is greater than largest uint232).
     *
     * Counterpart to Solidity's `uint232` operator.
     *
     * Requirements:
     *
     * - input must fit into 232 bits
     *
     * _Available since v4.7._
     */
    function toUint232(uint256 value) internal pure returns (uint232) {
        require(value <= type(uint232).max, "SafeCast: value doesn't fit in 232 bits");
        return uint232(value);
    }

    /**
     * @dev Returns the downcasted uint224 from uint256, reverting on
     * overflow (when the input is greater than largest uint224).
     *
     * Counterpart to Solidity's `uint224` operator.
     *
     * Requirements:
     *
     * - input must fit into 224 bits
     *
     * _Available since v4.2._
     */
    function toUint224(uint256 value) internal pure returns (uint224) {
        require(value <= type(uint224).max, "SafeCast: value doesn't fit in 224 bits");
        return uint224(value);
    }

    /**
     * @dev Returns the downcasted uint216 from uint256, reverting on
     * overflow (when the input is greater than largest uint216).
     *
     * Counterpart to Solidity's `uint216` operator.
     *
     * Requirements:
     *
     * - input must fit into 216 bits
     *
     * _Available since v4.7._
     */
    function toUint216(uint256 value) internal pure returns (uint216) {
        require(value <= type(uint216).max, "SafeCast: value doesn't fit in 216 bits");
        return uint216(value);
    }

    /**
     * @dev Returns the downcasted uint208 from uint256, reverting on
     * overflow (when the input is greater than largest uint208).
     *
     * Counterpart to Solidity's `uint208` operator.
     *
     * Requirements:
     *
     * - input must fit into 208 bits
     *
     * _Available since v4.7._
     */
    function toUint208(uint256 value) internal pure returns (uint208) {
        require(value <= type(uint208).max, "SafeCast: value doesn't fit in 208 bits");
        return uint208(value);
    }

    /**
     * @dev Returns the downcasted uint200 from uint256, reverting on
     * overflow (when the input is greater than largest uint200).
     *
     * Counterpart to Solidity's `uint200` operator.
     *
     * Requirements:
     *
     * - input must fit into 200 bits
     *
     * _Available since v4.7._
     */
    function toUint200(uint256 value) internal pure returns (uint200) {
        require(value <= type(uint200).max, "SafeCast: value doesn't fit in 200 bits");
        return uint200(value);
    }

    /**
     * @dev Returns the downcasted uint192 from uint256, reverting on
     * overflow (when the input is greater than largest uint192).
     *
     * Counterpart to Solidity's `uint192` operator.
     *
     * Requirements:
     *
     * - input must fit into 192 bits
     *
     * _Available since v4.7._
     */
    function toUint192(uint256 value) internal pure returns (uint192) {
        require(value <= type(uint192).max, "SafeCast: value doesn't fit in 192 bits");
        return uint192(value);
    }

    /**
     * @dev Returns the downcasted uint184 from uint256, reverting on
     * overflow (when the input is greater than largest uint184).
     *
     * Counterpart to Solidity's `uint184` operator.
     *
     * Requirements:
     *
     * - input must fit into 184 bits
     *
     * _Available since v4.7._
     */
    function toUint184(uint256 value) internal pure returns (uint184) {
        require(value <= type(uint184).max, "SafeCast: value doesn't fit in 184 bits");
        return uint184(value);
    }

    /**
     * @dev Returns the downcasted uint176 from uint256, reverting on
     * overflow (when the input is greater than largest uint176).
     *
     * Counterpart to Solidity's `uint176` operator.
     *
     * Requirements:
     *
     * - input must fit into 176 bits
     *
     * _Available since v4.7._
     */
    function toUint176(uint256 value) internal pure returns (uint176) {
        require(value <= type(uint176).max, "SafeCast: value doesn't fit in 176 bits");
        return uint176(value);
    }

    /**
     * @dev Returns the downcasted uint168 from uint256, reverting on
     * overflow (when the input is greater than largest uint168).
     *
     * Counterpart to Solidity's `uint168` operator.
     *
     * Requirements:
     *
     * - input must fit into 168 bits
     *
     * _Available since v4.7._
     */
    function toUint168(uint256 value) internal pure returns (uint168) {
        require(value <= type(uint168).max, "SafeCast: value doesn't fit in 168 bits");
        return uint168(value);
    }

    /**
     * @dev Returns the downcasted uint160 from uint256, reverting on
     * overflow (when the input is greater than largest uint160).
     *
     * Counterpart to Solidity's `uint160` operator.
     *
     * Requirements:
     *
     * - input must fit into 160 bits
     *
     * _Available since v4.7._
     */
    function toUint160(uint256 value) internal pure returns (uint160) {
        require(value <= type(uint160).max, "SafeCast: value doesn't fit in 160 bits");
        return uint160(value);
    }

    /**
     * @dev Returns the downcasted uint152 from uint256, reverting on
     * overflow (when the input is greater than largest uint152).
     *
     * Counterpart to Solidity's `uint152` operator.
     *
     * Requirements:
     *
     * - input must fit into 152 bits
     *
     * _Available since v4.7._
     */
    function toUint152(uint256 value) internal pure returns (uint152) {
        require(value <= type(uint152).max, "SafeCast: value doesn't fit in 152 bits");
        return uint152(value);
    }

    /**
     * @dev Returns the downcasted uint144 from uint256, reverting on
     * overflow (when the input is greater than largest uint144).
     *
     * Counterpart to Solidity's `uint144` operator.
     *
     * Requirements:
     *
     * - input must fit into 144 bits
     *
     * _Available since v4.7._
     */
    function toUint144(uint256 value) internal pure returns (uint144) {
        require(value <= type(uint144).max, "SafeCast: value doesn't fit in 144 bits");
        return uint144(value);
    }

    /**
     * @dev Returns the downcasted uint136 from uint256, reverting on
     * overflow (when the input is greater than largest uint136).
     *
     * Counterpart to Solidity's `uint136` operator.
     *
     * Requirements:
     *
     * - input must fit into 136 bits
     *
     * _Available since v4.7._
     */
    function toUint136(uint256 value) internal pure returns (uint136) {
        require(value <= type(uint136).max, "SafeCast: value doesn't fit in 136 bits");
        return uint136(value);
    }

    /**
     * @dev Returns the downcasted uint128 from uint256, reverting on
     * overflow (when the input is greater than largest uint128).
     *
     * Counterpart to Solidity's `uint128` operator.
     *
     * Requirements:
     *
     * - input must fit into 128 bits
     *
     * _Available since v2.5._
     */
    function toUint128(uint256 value) internal pure returns (uint128) {
        require(value <= type(uint128).max, "SafeCast: value doesn't fit in 128 bits");
        return uint128(value);
    }

    /**
     * @dev Returns the downcasted uint120 from uint256, reverting on
     * overflow (when the input is greater than largest uint120).
     *
     * Counterpart to Solidity's `uint120` operator.
     *
     * Requirements:
     *
     * - input must fit into 120 bits
     *
     * _Available since v4.7._
     */
    function toUint120(uint256 value) internal pure returns (uint120) {
        require(value <= type(uint120).max, "SafeCast: value doesn't fit in 120 bits");
        return uint120(value);
    }

    /**
     * @dev Returns the downcasted uint112 from uint256, reverting on
     * overflow (when the input is greater than largest uint112).
     *
     * Counterpart to Solidity's `uint112` operator.
     *
     * Requirements:
     *
     * - input must fit into 112 bits
     *
     * _Available since v4.7._
     */
    function toUint112(uint256 value) internal pure returns (uint112) {
        require(value <= type(uint112).max, "SafeCast: value doesn't fit in 112 bits");
        return uint112(value);
    }

    /**
     * @dev Returns the downcasted uint104 from uint256, reverting on
     * overflow (when the input is greater than largest uint104).
     *
     * Counterpart to Solidity's `uint104` operator.
     *
     * Requirements:
     *
     * - input must fit into 104 bits
     *
     * _Available since v4.7._
     */
    function toUint104(uint256 value) internal pure returns (uint104) {
        require(value <= type(uint104).max, "SafeCast: value doesn't fit in 104 bits");
        return uint104(value);
    }

    /**
     * @dev Returns the downcasted uint96 from uint256, reverting on
     * overflow (when the input is greater than largest uint96).
     *
     * Counterpart to Solidity's `uint96` operator.
     *
     * Requirements:
     *
     * - input must fit into 96 bits
     *
     * _Available since v4.2._
     */
    function toUint96(uint256 value) internal pure returns (uint96) {
        require(value <= type(uint96).max, "SafeCast: value doesn't fit in 96 bits");
        return uint96(value);
    }

    /**
     * @dev Returns the downcasted uint88 from uint256, reverting on
     * overflow (when the input is greater than largest uint88).
     *
     * Counterpart to Solidity's `uint88` operator.
     *
     * Requirements:
     *
     * - input must fit into 88 bits
     *
     * _Available since v4.7._
     */
    function toUint88(uint256 value) internal pure returns (uint88) {
        require(value <= type(uint88).max, "SafeCast: value doesn't fit in 88 bits");
        return uint88(value);
    }

    /**
     * @dev Returns the downcasted uint80 from uint256, reverting on
     * overflow (when the input is greater than largest uint80).
     *
     * Counterpart to Solidity's `uint80` operator.
     *
     * Requirements:
     *
     * - input must fit into 80 bits
     *
     * _Available since v4.7._
     */
    function toUint80(uint256 value) internal pure returns (uint80) {
        require(value <= type(uint80).max, "SafeCast: value doesn't fit in 80 bits");
        return uint80(value);
    }

    /**
     * @dev Returns the downcasted uint72 from uint256, reverting on
     * overflow (when the input is greater than largest uint72).
     *
     * Counterpart to Solidity's `uint72` operator.
     *
     * Requirements:
     *
     * - input must fit into 72 bits
     *
     * _Available since v4.7._
     */
    function toUint72(uint256 value) internal pure returns (uint72) {
        require(value <= type(uint72).max, "SafeCast: value doesn't fit in 72 bits");
        return uint72(value);
    }

    /**
     * @dev Returns the downcasted uint64 from uint256, reverting on
     * overflow (when the input is greater than largest uint64).
     *
     * Counterpart to Solidity's `uint64` operator.
     *
     * Requirements:
     *
     * - input must fit into 64 bits
     *
     * _Available since v2.5._
     */
    function toUint64(uint256 value) internal pure returns (uint64) {
        require(value <= type(uint64).max, "SafeCast: value doesn't fit in 64 bits");
        return uint64(value);
    }

    /**
     * @dev Returns the downcasted uint56 from uint256, reverting on
     * overflow (when the input is greater than largest uint56).
     *
     * Counterpart to Solidity's `uint56` operator.
     *
     * Requirements:
     *
     * - input must fit into 56 bits
     *
     * _Available since v4.7._
     */
    function toUint56(uint256 value) internal pure returns (uint56) {
        require(value <= type(uint56).max, "SafeCast: value doesn't fit in 56 bits");
        return uint56(value);
    }

    /**
     * @dev Returns the downcasted uint48 from uint256, reverting on
     * overflow (when the input is greater than largest uint48).
     *
     * Counterpart to Solidity's `uint48` operator.
     *
     * Requirements:
     *
     * - input must fit into 48 bits
     *
     * _Available since v4.7._
     */
    function toUint48(uint256 value) internal pure returns (uint48) {
        require(value <= type(uint48).max, "SafeCast: value doesn't fit in 48 bits");
        return uint48(value);
    }

    /**
     * @dev Returns the downcasted uint40 from uint256, reverting on
     * overflow (when the input is greater than largest uint40).
     *
     * Counterpart to Solidity's `uint40` operator.
     *
     * Requirements:
     *
     * - input must fit into 40 bits
     *
     * _Available since v4.7._
     */
    function toUint40(uint256 value) internal pure returns (uint40) {
        require(value <= type(uint40).max, "SafeCast: value doesn't fit in 40 bits");
        return uint40(value);
    }

    /**
     * @dev Returns the downcasted uint32 from uint256, reverting on
     * overflow (when the input is greater than largest uint32).
     *
     * Counterpart to Solidity's `uint32` operator.
     *
     * Requirements:
     *
     * - input must fit into 32 bits
     *
     * _Available since v2.5._
     */
    function toUint32(uint256 value) internal pure returns (uint32) {
        require(value <= type(uint32).max, "SafeCast: value doesn't fit in 32 bits");
        return uint32(value);
    }

    /**
     * @dev Returns the downcasted uint24 from uint256, reverting on
     * overflow (when the input is greater than largest uint24).
     *
     * Counterpart to Solidity's `uint24` operator.
     *
     * Requirements:
     *
     * - input must fit into 24 bits
     *
     * _Available since v4.7._
     */
    function toUint24(uint256 value) internal pure returns (uint24) {
        require(value <= type(uint24).max, "SafeCast: value doesn't fit in 24 bits");
        return uint24(value);
    }

    /**
     * @dev Returns the downcasted uint16 from uint256, reverting on
     * overflow (when the input is greater than largest uint16).
     *
     * Counterpart to Solidity's `uint16` operator.
     *
     * Requirements:
     *
     * - input must fit into 16 bits
     *
     * _Available since v2.5._
     */
    function toUint16(uint256 value) internal pure returns (uint16) {
        require(value <= type(uint16).max, "SafeCast: value doesn't fit in 16 bits");
        return uint16(value);
    }

    /**
     * @dev Returns the downcasted uint8 from uint256, reverting on
     * overflow (when the input is greater than largest uint8).
     *
     * Counterpart to Solidity's `uint8` operator.
     *
     * Requirements:
     *
     * - input must fit into 8 bits
     *
     * _Available since v2.5._
     */
    function toUint8(uint256 value) internal pure returns (uint8) {
        require(value <= type(uint8).max, "SafeCast: value doesn't fit in 8 bits");
        return uint8(value);
    }

    /**
     * @dev Converts a signed int256 into an unsigned uint256.
     *
     * Requirements:
     *
     * - input must be greater than or equal to 0.
     *
     * _Available since v3.0._
     */
    function toUint256(int256 value) internal pure returns (uint256) {
        require(value >= 0, "SafeCast: value must be positive");
        return uint256(value);
    }

    /**
     * @dev Returns the downcasted int248 from int256, reverting on
     * overflow (when the input is less than smallest int248 or
     * greater than largest int248).
     *
     * Counterpart to Solidity's `int248` operator.
     *
     * Requirements:
     *
     * - input must fit into 248 bits
     *
     * _Available since v4.7._
     */
    function toInt248(int256 value) internal pure returns (int248) {
        require(value >= type(int248).min && value <= type(int248).max, "SafeCast: value doesn't fit in 248 bits");
        return int248(value);
    }

    /**
     * @dev Returns the downcasted int240 from int256, reverting on
     * overflow (when the input is less than smallest int240 or
     * greater than largest int240).
     *
     * Counterpart to Solidity's `int240` operator.
     *
     * Requirements:
     *
     * - input must fit into 240 bits
     *
     * _Available since v4.7._
     */
    function toInt240(int256 value) internal pure returns (int240) {
        require(value >= type(int240).min && value <= type(int240).max, "SafeCast: value doesn't fit in 240 bits");
        return int240(value);
    }

    /**
     * @dev Returns the downcasted int232 from int256, reverting on
     * overflow (when the input is less than smallest int232 or
     * greater than largest int232).
     *
     * Counterpart to Solidity's `int232` operator.
     *
     * Requirements:
     *
     * - input must fit into 232 bits
     *
     * _Available since v4.7._
     */
    function toInt232(int256 value) internal pure returns (int232) {
        require(value >= type(int232).min && value <= type(int232).max, "SafeCast: value doesn't fit in 232 bits");
        return int232(value);
    }

    /**
     * @dev Returns the downcasted int224 from int256, reverting on
     * overflow (when the input is less than smallest int224 or
     * greater than largest int224).
     *
     * Counterpart to Solidity's `int224` operator.
     *
     * Requirements:
     *
     * - input must fit into 224 bits
     *
     * _Available since v4.7._
     */
    function toInt224(int256 value) internal pure returns (int224) {
        require(value >= type(int224).min && value <= type(int224).max, "SafeCast: value doesn't fit in 224 bits");
        return int224(value);
    }

    /**
     * @dev Returns the downcasted int216 from int256, reverting on
     * overflow (when the input is less than smallest int216 or
     * greater than largest int216).
     *
     * Counterpart to Solidity's `int216` operator.
     *
     * Requirements:
     *
     * - input must fit into 216 bits
     *
     * _Available since v4.7._
     */
    function toInt216(int256 value) internal pure returns (int216) {
        require(value >= type(int216).min && value <= type(int216).max, "SafeCast: value doesn't fit in 216 bits");
        return int216(value);
    }

    /**
     * @dev Returns the downcasted int208 from int256, reverting on
     * overflow (when the input is less than smallest int208 or
     * greater than largest int208).
     *
     * Counterpart to Solidity's `int208` operator.
     *
     * Requirements:
     *
     * - input must fit into 208 bits
     *
     * _Available since v4.7._
     */
    function toInt208(int256 value) internal pure returns (int208) {
        require(value >= type(int208).min && value <= type(int208).max, "SafeCast: value doesn't fit in 208 bits");
        return int208(value);
    }

    /**
     * @dev Returns the downcasted int200 from int256, reverting on
     * overflow (when the input is less than smallest int200 or
     * greater than largest int200).
     *
     * Counterpart to Solidity's `int200` operator.
     *
     * Requirements:
     *
     * - input must fit into 200 bits
     *
     * _Available since v4.7._
     */
    function toInt200(int256 value) internal pure returns (int200) {
        require(value >= type(int200).min && value <= type(int200).max, "SafeCast: value doesn't fit in 200 bits");
        return int200(value);
    }

    /**
     * @dev Returns the downcasted int192 from int256, reverting on
     * overflow (when the input is less than smallest int192 or
     * greater than largest int192).
     *
     * Counterpart to Solidity's `int192` operator.
     *
     * Requirements:
     *
     * - input must fit into 192 bits
     *
     * _Available since v4.7._
     */
    function toInt192(int256 value) internal pure returns (int192) {
        require(value >= type(int192).min && value <= type(int192).max, "SafeCast: value doesn't fit in 192 bits");
        return int192(value);
    }

    /**
     * @dev Returns the downcasted int184 from int256, reverting on
     * overflow (when the input is less than smallest int184 or
     * greater than largest int184).
     *
     * Counterpart to Solidity's `int184` operator.
     *
     * Requirements:
     *
     * - input must fit into 184 bits
     *
     * _Available since v4.7._
     */
    function toInt184(int256 value) internal pure returns (int184) {
        require(value >= type(int184).min && value <= type(int184).max, "SafeCast: value doesn't fit in 184 bits");
        return int184(value);
    }

    /**
     * @dev Returns the downcasted int176 from int256, reverting on
     * overflow (when the input is less than smallest int176 or
     * greater than largest int176).
     *
     * Counterpart to Solidity's `int176` operator.
     *
     * Requirements:
     *
     * - input must fit into 176 bits
     *
     * _Available since v4.7._
     */
    function toInt176(int256 value) internal pure returns (int176) {
        require(value >= type(int176).min && value <= type(int176).max, "SafeCast: value doesn't fit in 176 bits");
        return int176(value);
    }

    /**
     * @dev Returns the downcasted int168 from int256, reverting on
     * overflow (when the input is less than smallest int168 or
     * greater than largest int168).
     *
     * Counterpart to Solidity's `int168` operator.
     *
     * Requirements:
     *
     * - input must fit into 168 bits
     *
     * _Available since v4.7._
     */
    function toInt168(int256 value) internal pure returns (int168) {
        require(value >= type(int168).min && value <= type(int168).max, "SafeCast: value doesn't fit in 168 bits");
        return int168(value);
    }

    /**
     * @dev Returns the downcasted int160 from int256, reverting on
     * overflow (when the input is less than smallest int160 or
     * greater than largest int160).
     *
     * Counterpart to Solidity's `int160` operator.
     *
     * Requirements:
     *
     * - input must fit into 160 bits
     *
     * _Available since v4.7._
     */
    function toInt160(int256 value) internal pure returns (int160) {
        require(value >= type(int160).min && value <= type(int160).max, "SafeCast: value doesn't fit in 160 bits");
        return int160(value);
    }

    /**
     * @dev Returns the downcasted int152 from int256, reverting on
     * overflow (when the input is less than smallest int152 or
     * greater than largest int152).
     *
     * Counterpart to Solidity's `int152` operator.
     *
     * Requirements:
     *
     * - input must fit into 152 bits
     *
     * _Available since v4.7._
     */
    function toInt152(int256 value) internal pure returns (int152) {
        require(value >= type(int152).min && value <= type(int152).max, "SafeCast: value doesn't fit in 152 bits");
        return int152(value);
    }

    /**
     * @dev Returns the downcasted int144 from int256, reverting on
     * overflow (when the input is less than smallest int144 or
     * greater than largest int144).
     *
     * Counterpart to Solidity's `int144` operator.
     *
     * Requirements:
     *
     * - input must fit into 144 bits
     *
     * _Available since v4.7._
     */
    function toInt144(int256 value) internal pure returns (int144) {
        require(value >= type(int144).min && value <= type(int144).max, "SafeCast: value doesn't fit in 144 bits");
        return int144(value);
    }

    /**
     * @dev Returns the downcasted int136 from int256, reverting on
     * overflow (when the input is less than smallest int136 or
     * greater than largest int136).
     *
     * Counterpart to Solidity's `int136` operator.
     *
     * Requirements:
     *
     * - input must fit into 136 bits
     *
     * _Available since v4.7._
     */
    function toInt136(int256 value) internal pure returns (int136) {
        require(value >= type(int136).min && value <= type(int136).max, "SafeCast: value doesn't fit in 136 bits");
        return int136(value);
    }

    /**
     * @dev Returns the downcasted int128 from int256, reverting on
     * overflow (when the input is less than smallest int128 or
     * greater than largest int128).
     *
     * Counterpart to Solidity's `int128` operator.
     *
     * Requirements:
     *
     * - input must fit into 128 bits
     *
     * _Available since v3.1._
     */
    function toInt128(int256 value) internal pure returns (int128) {
        require(value >= type(int128).min && value <= type(int128).max, "SafeCast: value doesn't fit in 128 bits");
        return int128(value);
    }

    /**
     * @dev Returns the downcasted int120 from int256, reverting on
     * overflow (when the input is less than smallest int120 or
     * greater than largest int120).
     *
     * Counterpart to Solidity's `int120` operator.
     *
     * Requirements:
     *
     * - input must fit into 120 bits
     *
     * _Available since v4.7._
     */
    function toInt120(int256 value) internal pure returns (int120) {
        require(value >= type(int120).min && value <= type(int120).max, "SafeCast: value doesn't fit in 120 bits");
        return int120(value);
    }

    /**
     * @dev Returns the downcasted int112 from int256, reverting on
     * overflow (when the input is less than smallest int112 or
     * greater than largest int112).
     *
     * Counterpart to Solidity's `int112` operator.
     *
     * Requirements:
     *
     * - input must fit into 112 bits
     *
     * _Available since v4.7._
     */
    function toInt112(int256 value) internal pure returns (int112) {
        require(value >= type(int112).min && value <= type(int112).max, "SafeCast: value doesn't fit in 112 bits");
        return int112(value);
    }

    /**
     * @dev Returns the downcasted int104 from int256, reverting on
     * overflow (when the input is less than smallest int104 or
     * greater than largest int104).
     *
     * Counterpart to Solidity's `int104` operator.
     *
     * Requirements:
     *
     * - input must fit into 104 bits
     *
     * _Available since v4.7._
     */
    function toInt104(int256 value) internal pure returns (int104) {
        require(value >= type(int104).min && value <= type(int104).max, "SafeCast: value doesn't fit in 104 bits");
        return int104(value);
    }

    /**
     * @dev Returns the downcasted int96 from int256, reverting on
     * overflow (when the input is less than smallest int96 or
     * greater than largest int96).
     *
     * Counterpart to Solidity's `int96` operator.
     *
     * Requirements:
     *
     * - input must fit into 96 bits
     *
     * _Available since v4.7._
     */
    function toInt96(int256 value) internal pure returns (int96) {
        require(value >= type(int96).min && value <= type(int96).max, "SafeCast: value doesn't fit in 96 bits");
        return int96(value);
    }

    /**
     * @dev Returns the downcasted int88 from int256, reverting on
     * overflow (when the input is less than smallest int88 or
     * greater than largest int88).
     *
     * Counterpart to Solidity's `int88` operator.
     *
     * Requirements:
     *
     * - input must fit into 88 bits
     *
     * _Available since v4.7._
     */
    function toInt88(int256 value) internal pure returns (int88) {
        require(value >= type(int88).min && value <= type(int88).max, "SafeCast: value doesn't fit in 88 bits");
        return int88(value);
    }

    /**
     * @dev Returns the downcasted int80 from int256, reverting on
     * overflow (when the input is less than smallest int80 or
     * greater than largest int80).
     *
     * Counterpart to Solidity's `int80` operator.
     *
     * Requirements:
     *
     * - input must fit into 80 bits
     *
     * _Available since v4.7._
     */
    function toInt80(int256 value) internal pure returns (int80) {
        require(value >= type(int80).min && value <= type(int80).max, "SafeCast: value doesn't fit in 80 bits");
        return int80(value);
    }

    /**
     * @dev Returns the downcasted int72 from int256, reverting on
     * overflow (when the input is less than smallest int72 or
     * greater than largest int72).
     *
     * Counterpart to Solidity's `int72` operator.
     *
     * Requirements:
     *
     * - input must fit into 72 bits
     *
     * _Available since v4.7._
     */
    function toInt72(int256 value) internal pure returns (int72) {
        require(value >= type(int72).min && value <= type(int72).max, "SafeCast: value doesn't fit in 72 bits");
        return int72(value);
    }

    /**
     * @dev Returns the downcasted int64 from int256, reverting on
     * overflow (when the input is less than smallest int64 or
     * greater than largest int64).
     *
     * Counterpart to Solidity's `int64` operator.
     *
     * Requirements:
     *
     * - input must fit into 64 bits
     *
     * _Available since v3.1._
     */
    function toInt64(int256 value) internal pure returns (int64) {
        require(value >= type(int64).min && value <= type(int64).max, "SafeCast: value doesn't fit in 64 bits");
        return int64(value);
    }

    /**
     * @dev Returns the downcasted int56 from int256, reverting on
     * overflow (when the input is less than smallest int56 or
     * greater than largest int56).
     *
     * Counterpart to Solidity's `int56` operator.
     *
     * Requirements:
     *
     * - input must fit into 56 bits
     *
     * _Available since v4.7._
     */
    function toInt56(int256 value) internal pure returns (int56) {
        require(value >= type(int56).min && value <= type(int56).max, "SafeCast: value doesn't fit in 56 bits");
        return int56(value);
    }

    /**
     * @dev Returns the downcasted int48 from int256, reverting on
     * overflow (when the input is less than smallest int48 or
     * greater than largest int48).
     *
     * Counterpart to Solidity's `int48` operator.
     *
     * Requirements:
     *
     * - input must fit into 48 bits
     *
     * _Available since v4.7._
     */
    function toInt48(int256 value) internal pure returns (int48) {
        require(value >= type(int48).min && value <= type(int48).max, "SafeCast: value doesn't fit in 48 bits");
        return int48(value);
    }

    /**
     * @dev Returns the downcasted int40 from int256, reverting on
     * overflow (when the input is less than smallest int40 or
     * greater than largest int40).
     *
     * Counterpart to Solidity's `int40` operator.
     *
     * Requirements:
     *
     * - input must fit into 40 bits
     *
     * _Available since v4.7._
     */
    function toInt40(int256 value) internal pure returns (int40) {
        require(value >= type(int40).min && value <= type(int40).max, "SafeCast: value doesn't fit in 40 bits");
        return int40(value);
    }

    /**
     * @dev Returns the downcasted int32 from int256, reverting on
     * overflow (when the input is less than smallest int32 or
     * greater than largest int32).
     *
     * Counterpart to Solidity's `int32` operator.
     *
     * Requirements:
     *
     * - input must fit into 32 bits
     *
     * _Available since v3.1._
     */
    function toInt32(int256 value) internal pure returns (int32) {
        require(value >= type(int32).min && value <= type(int32).max, "SafeCast: value doesn't fit in 32 bits");
        return int32(value);
    }

    /**
     * @dev Returns the downcasted int24 from int256, reverting on
     * overflow (when the input is less than smallest int24 or
     * greater than largest int24).
     *
     * Counterpart to Solidity's `int24` operator.
     *
     * Requirements:
     *
     * - input must fit into 24 bits
     *
     * _Available since v4.7._
     */
    function toInt24(int256 value) internal pure returns (int24) {
        require(value >= type(int24).min && value <= type(int24).max, "SafeCast: value doesn't fit in 24 bits");
        return int24(value);
    }

    /**
     * @dev Returns the downcasted int16 from int256, reverting on
     * overflow (when the input is less than smallest int16 or
     * greater than largest int16).
     *
     * Counterpart to Solidity's `int16` operator.
     *
     * Requirements:
     *
     * - input must fit into 16 bits
     *
     * _Available since v3.1._
     */
    function toInt16(int256 value) internal pure returns (int16) {
        require(value >= type(int16).min && value <= type(int16).max, "SafeCast: value doesn't fit in 16 bits");
        return int16(value);
    }

    /**
     * @dev Returns the downcasted int8 from int256, reverting on
     * overflow (when the input is less than smallest int8 or
     * greater than largest int8).
     *
     * Counterpart to Solidity's `int8` operator.
     *
     * Requirements:
     *
     * - input must fit into 8 bits
     *
     * _Available since v3.1._
     */
    function toInt8(int256 value) internal pure returns (int8) {
        require(value >= type(int8).min && value <= type(int8).max, "SafeCast: value doesn't fit in 8 bits");
        return int8(value);
    }

    /**
     * @dev Converts an unsigned uint256 into a signed int256.
     *
     * Requirements:
     *
     * - input must be less than or equal to maxInt256.
     *
     * _Available since v3.0._
     */
    function toInt256(uint256 value) internal pure returns (int256) {
        // Note: Unsafe cast below is okay because `type(int256).max` is guaranteed to be positive
        require(value <= uint256(type(int256).max), "SafeCast: value doesn't fit in an int256");
        return int256(value);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (utils/Strings.sol)

pragma solidity ^0.8.0;

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

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

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

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

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

    /**
     * @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);
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "./CharacterActivity.sol";

contract WrappedCharacters is CharacterActivity, ERC721, ERC721Holder, ReentrancyGuard {

// CONSTRUCTOR

    constructor (string memory name_, string memory symbol_) ERC721(name_, symbol_) {}

// STATE VARIABLES

    // @dev Track the wrapped token id
    uint256 internal totalTokens;

    /// @dev This stores the base URI used to generate the token ID
    string public baseURI;

// MODIFIERS

    /// @dev Only if a character is wrapped
    /// @param tokenID of character
    modifier onlyExists(uint256 tokenID) {
        require (_exists(tokenID),"Character does not exist");
        _;
    }  

    /// @dev Only the owner of the character can perform this action
    /// @param tokenID of character
    modifier onlyOwnerOfToken(uint256 tokenID) {
        require (ownerOf(tokenID) == _msgSender(),"Only the owner of the token can perform this action");
        _;
    }  

// FUNCTIONS

    /// @dev Wraps an NFT & mints a wrappedCharacter
    /// @param account to interact with
    /// @param wrappedTokenID ID of the token
    /// @param collectionAddress address of the NFT collection
    function wrap(address account, uint256 wrappedTokenID, address collectionAddress)
        external
        nonReentrant
        isWrappable(collectionAddress)
        onlyAllowed
    {
        // Get the tokenID, if never wrapped before then it will be 0 & stamina will be 0
        uint256 tokenID;
        if (isNeverWrapped(collectionAddress, wrappedTokenID)) {
            // Increment wrapped token id
            unchecked { totalTokens++; }
            // Store the totalTokens as a local variable
            tokenID = totalTokens;
            // Set the stats
           _storeStats(collectionAddress, wrappedTokenID);
        } else {
            // Get the ID of previously wrapped token
            tokenID = tokenIDByHash[hashWrappedToken(collectionAddress,wrappedTokenID)];
        }
        // Wrap the character
        _wrap(account, collectionAddress, wrappedTokenID, tokenID);
        // Mint a wrapped character
        _mint(account, tokenID);
    }

    /// @dev Unwraps an NFT & burns the wrappedCharacter
    /// @param tokenID ID of the token
    function unwrap(uint256 tokenID) 
        external
        nonReentrant
        onlyExists(tokenID)
        onlyOwnerOfToken(tokenID)
    {        
        _burn(tokenID);
        _unwrap(tokenID);
    }

    /// @dev Increases a stat
    /// @param tokenID ID of the token
    /// @param amount to increase
    /// @param statIndex index of stat
    function increaseStat(uint256 tokenID, uint256 amount, uint256 statIndex)
        external
        onlyAllowed
        onlyExists(tokenID)
    {
        _increaseStat(tokenID, amount, statIndex);
    }

    /// @dev Decreases a stat
    /// @param tokenID ID of the token
    /// @param amount to increase
    /// @param statIndex index of stat
    function decreaseStat(uint256 tokenID, uint256 amount, uint256 statIndex)
        external
        onlyAllowed
        onlyExists(tokenID)
    {
        _decreaseStat(tokenID, amount, statIndex);
    }

    /// @dev Set characters stat to an arbitrary amount
    /// @dev if amount = stat then there's no change
    /// @param tokenID Characters ID
    /// @param amount to add
    function setStatTo(uint256 tokenID, uint256 amount, uint256 statIndex)
        external
        onlyAllowed
        onlyExists(tokenID)
    {
        _setStatTo(tokenID, amount, statIndex);
    }

    /// @dev Boost stats based on level, enables character progression
    /// @param tokenID Characters ID
    /// @param amount amount to increase stat
    /// @param statIndex which stat to increase
    function boostStat(uint256 tokenID, uint256 amount, uint256 statIndex)
        external
        onlyAllowed
        onlyExists(tokenID)
    {
        _boostStat(tokenID, amount, statIndex);
    }

    /// @dev Update characters activity status
    /// @param tokenID Characters ID
    /// @param active the amount
    function updateActivityStatus(uint256 tokenID, bool active)
        external
        onlyAllowed
        onlyExists(tokenID)
    {
        _updateActivityStatus (tokenID, active);
    }
    
    /// @dev Update characters Activity details
    /// @param tokenID Characters ID
    /// @param activity the activity details defined in the Activity struct
    function startActivity(uint256 tokenID, Activity calldata activity)
        external 
        onlyAllowed
        onlyExists(tokenID)
    {
        _startActivity(tokenID, activity);
    }


 // OWNER FUNCTION

    /// @dev If the metadata needs to be moved
    function setBaseURI(string memory uri)
        external
        onlyOwner
    {
        baseURI = uri;
    }

// VIEWS

    /// @dev Returns the total amount of tokens stored by the contract.
    function totalSupply() external view returns (uint256)
    {
        return totalTokens;
    }

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

}

{
  "compilationTarget": {
    "project:/contracts/mercenaries/Mercenaries.sol": "Mercenaries"
  },
  "evmVersion": "london",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "remappings": []
}