// SPDX-License-Identifier: MIT

/**
 *       $$$$$                                                                                                              
 *       $:::$                                                                                                              
 *   $$$$$:::$$$$$$ BBBBBBBBBBBBBBBBB        OOOOOOOOO     NNNNNNNN        NNNNNNNNEEEEEEEEEEEEEEEEEEEEEE   SSSSSSSSSSSSSSS 
 * $$::::::::::::::$B::::::::::::::::B     OO:::::::::OO   N:::::::N       N::::::NE::::::::::::::::::::E SS:::::::::::::::S
 *$:::::$$$$$$$::::$B::::::BBBBBB:::::B  OO:::::::::::::OO N::::::::N      N::::::NE::::::::::::::::::::ES:::::SSSSSS::::::S
 *$::::$       $$$$$BB:::::B     B:::::BO:::::::OOO:::::::ON:::::::::N     N::::::NEE::::::EEEEEEEEE::::ES:::::S     SSSSSSS
 *$::::$              B::::B     B:::::BO::::::O   O::::::ON::::::::::N    N::::::N  E:::::E       EEEEEES:::::S            
 *$::::$              B::::B     B:::::BO:::::O     O:::::ON:::::::::::N   N::::::N  E:::::E             S:::::S            
 *$:::::$$$$$$$$$     B::::BBBBBB:::::B O:::::O     O:::::ON:::::::N::::N  N::::::N  E::::::EEEEEEEEEE    S::::SSSS         
 * $$::::::::::::$$   B:::::::::::::BB  O:::::O     O:::::ON::::::N N::::N N::::::N  E:::::::::::::::E     SS::::::SSSSS    
 *   $$$$$$$$$:::::$  B::::BBBBBB:::::B O:::::O     O:::::ON::::::N  N::::N:::::::N  E:::::::::::::::E       SSS::::::::SS  
 *            $::::$  B::::B     B:::::BO:::::O     O:::::ON::::::N   N:::::::::::N  E::::::EEEEEEEEEE          SSSSSS::::S 
 *            $::::$  B::::B     B:::::BO:::::O     O:::::ON::::::N    N::::::::::N  E:::::E                         S:::::S
 *$$$$$       $::::$  B::::B     B:::::BO::::::O   O::::::ON::::::N     N:::::::::N  E:::::E       EEEEEE            S:::::S
 *$::::$$$$$$$:::::$BB:::::BBBBBB::::::BO:::::::OOO:::::::ON::::::N      N::::::::NEE::::::EEEEEEEE:::::ESSSSSSS     S:::::S
 *$::::::::::::::$$ B:::::::::::::::::B  OO:::::::::::::OO N::::::N       N:::::::NE::::::::::::::::::::ES::::::SSSSSS:::::S
 * $$$$$$:::$$$$$   B::::::::::::::::B     OO:::::::::OO   N::::::N        N::::::NE::::::::::::::::::::ES:::::::::::::::SS 
 *      $:::$       BBBBBBBBBBBBBBBBB        OOOOOOOOO     NNNNNNNN         NNNNNNNEEEEEEEEEEEEEEEEEEEEEE SSSSSSSSSSSSSSS   
 *      $$$$$                                                                                                               
 *            
 *     .-.
 *    (o.o)
 *     |=|
 *    __|__
 *  //.=|=.\\
 * // .=|=. \\
 * \\ .=|=. //
 *  \\(_=_)//
 *   (:| |:)
 *    || ||
 *    () ()
 *    || ||
 *    || ||
 *   ==' '==                                                                                                              
 *                                                                                                                                                                                                                                                 
 * 
 * $BONES is NOT an investment vehicle and holds no economic or monetary value. 
 * The sole purpose of $BONES is to allow functionality within the Spectral Skellies Ecosystem.
 * 
 * Dev: @White_Oak_Kong
 * Contract inspiration from CryptoHoots TWIGS
 */


// File: @openzeppelin/contracts/utils/Context.sol



pragma solidity ^0.8.0;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}

// File: @openzeppelin/contracts/access/Ownable.sol



pragma solidity ^0.8.0;


/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _setOwner(_msgSender());
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _setOwner(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _setOwner(newOwner);
    }

    function _setOwner(address newOwner) private {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

// File: @openzeppelin/contracts/token/ERC20/IERC20.sol



pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `sender` to `recipient` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) external returns (bool);

    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);
}

// File: @openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol



pragma solidity ^0.8.0;


/**
 * @dev Interface for the optional metadata functions from the ERC20 standard.
 *
 * _Available since v4.1._
 */
interface IERC20Metadata is IERC20 {
    /**
     * @dev Returns the name of the token.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the symbol of the token.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the decimals places of the token.
     */
    function decimals() external view returns (uint8);
}

// File: @openzeppelin/contracts/token/ERC20/ERC20.sol



pragma solidity ^0.8.0;




/**
 * @dev Implementation of the {IERC20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 * For a generic mechanism see {ERC20PresetMinterPauser}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * We have followed general OpenZeppelin Contracts guidelines: functions revert
 * instead returning `false` on failure. This behavior is nonetheless
 * conventional and does not conflict with the expectations of ERC20
 * applications.
 *
 * Additionally, an {Approval} event is emitted on calls to {transferFrom}.
 * This allows applications to reconstruct the allowance for all accounts just
 * by listening to said events. Other implementations of the EIP may not emit
 * these events, as it isn't required by the specification.
 *
 * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
 * functions have been added to mitigate the well-known issues around setting
 * allowances. See {IERC20-approve}.
 */
contract ERC20 is Context, IERC20, IERC20Metadata {
    mapping(address => uint256) private _balances;

    mapping(address => mapping(address => uint256)) private _allowances;

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;

    /**
     * @dev Sets the values for {name} and {symbol}.
     *
     * The default value of {decimals} is 18. To select a different value for
     * {decimals} you should overload it.
     *
     * All two of these values are immutable: they can only be set once during
     * construction.
     */
    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

    /**
     * @dev Returns the name of the token.
     */
    function name() public view virtual override returns (string memory) {
        return _name;
    }

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    /**
     * @dev Returns the number of decimals used to get its user representation.
     * For example, if `decimals` equals `2`, a balance of `505` tokens should
     * be displayed to a user as `5.05` (`505 / 10 ** 2`).
     *
     * Tokens usually opt for a value of 18, imitating the relationship between
     * Ether and Wei. This is the value {ERC20} uses, unless this function is
     * overridden;
     *
     * NOTE: This information is only used for _display_ purposes: it in
     * no way affects any of the arithmetic of the contract, including
     * {IERC20-balanceOf} and {IERC20-transfer}.
     */
    function decimals() public view virtual override returns (uint8) {
        return 18;
    }

    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply() public view virtual override returns (uint256) {
        return _totalSupply;
    }

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view virtual override returns (uint256) {
        return _balances[account];
    }

    /**
     * @dev See {IERC20-transfer}.
     *
     * Requirements:
     *
     * - `recipient` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

    /**
     * @dev See {IERC20-allowance}.
     */
    function allowance(address owner, address spender) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }

    /**
     * @dev See {IERC20-approve}.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }

    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {ERC20}.
     *
     * Requirements:
     *
     * - `sender` and `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     * - the caller must have allowance for ``sender``'s tokens of at least
     * `amount`.
     */
    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) public virtual override returns (bool) {
        _transfer(sender, recipient, amount);

        uint256 currentAllowance = _allowances[sender][_msgSender()];
        require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
        unchecked {
            _approve(sender, _msgSender(), currentAllowance - amount);
        }

        return true;
    }

    /**
     * @dev Atomically increases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
        return true;
    }

    /**
     * @dev Atomically decreases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `spender` must have allowance for the caller of at least
     * `subtractedValue`.
     */
    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
        uint256 currentAllowance = _allowances[_msgSender()][spender];
        require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
        unchecked {
            _approve(_msgSender(), spender, currentAllowance - subtractedValue);
        }

        return true;
    }

    /**
     * @dev Moves `amount` of tokens from `sender` to `recipient`.
     *
     * This internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * Requirements:
     *
     * - `sender` cannot be the zero address.
     * - `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     */
    function _transfer(
        address sender,
        address recipient,
        uint256 amount
    ) internal virtual {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");

        _beforeTokenTransfer(sender, recipient, amount);

        uint256 senderBalance = _balances[sender];
        require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
        unchecked {
            _balances[sender] = senderBalance - amount;
        }
        _balances[recipient] += amount;

        emit Transfer(sender, recipient, amount);

        _afterTokenTransfer(sender, recipient, amount);
    }

    /** @dev Creates `amount` tokens and assigns them to `account`, increasing
     * the total supply.
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     */
    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");

        _beforeTokenTransfer(address(0), account, amount);

        _totalSupply += amount;
        _balances[account] += amount;
        emit Transfer(address(0), account, amount);

        _afterTokenTransfer(address(0), account, amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`, reducing the
     * total supply.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     * - `account` must have at least `amount` tokens.
     */
    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");

        _beforeTokenTransfer(account, address(0), amount);

        uint256 accountBalance = _balances[account];
        require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
        unchecked {
            _balances[account] = accountBalance - amount;
        }
        _totalSupply -= amount;

        emit Transfer(account, address(0), amount);

        _afterTokenTransfer(account, address(0), amount);
    }

    /**
     * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
     *
     * This internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     */
    function _approve(
        address owner,
        address spender,
        uint256 amount
    ) internal virtual {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");

        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    /**
     * @dev Hook that is called before any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * will be transferred to `to`.
     * - when `from` is zero, `amount` tokens will be minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens 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 amount
    ) 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, `amount` of ``from``'s tokens
     * has been transferred to `to`.
     * - when `from` is zero, `amount` tokens have been minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens have been 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 _afterTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {}
}

// File: contracts/BONESTestContract1.sol


pragma solidity ^0.8.0;

interface iSkellies {
    function balanceOf(address _user) external view returns(uint256);
    function ownerOf(uint256 _tokenId) external view returns(address);
    function totalSupply() external view returns (uint256);
}

contract BonesOfficial is ERC20("Bones", "BONES"), Ownable {
    struct ContractSettings {
        uint256 baseRate;
        uint256 initIssuance;
        uint256 start;
        uint256 end;
    }

    mapping(address => ContractSettings) public contractSettings;
    mapping(address => bool) public trustedContracts;

    uint256 constant public MAX_BASE_RATE = 10 ether;
    uint256 constant public MAX_INITIAL_ISSUANCE = 70 ether;

    // Prevents new contracts from being added or changes to disbursement if permanently locked
    bool public isLocked = false;
    mapping(bytes32 => uint256) public lastClaim;
    
    event RewardPaid(address indexed user, uint256 reward);

    constructor() {}

    /**
        - needs onlyOwner flag
        - needs to check that the baseRate and initIssuance are not greater than the max settings
        - require that contract isn't locked
     */
    function addContract(address _contractAddress, uint256 _baseRate, uint256 _initIssuance) public onlyOwner {
        require(_baseRate <= MAX_BASE_RATE && _initIssuance <= MAX_INITIAL_ISSUANCE, "baseRate or initIssuance exceeds max value.");
        require(!isLocked, "Cannot add any more contracts.");

        // add to trustedContracts
        trustedContracts[_contractAddress] = true;

        // initialize contractSettings
        contractSettings[_contractAddress] = ContractSettings({ 
            baseRate: _baseRate,
            initIssuance: _initIssuance,
            start: block.timestamp,
            end: type(uint256).max
        });
    }

    /**
        - sets an end date for when rewards officially end
     */
    function setEndDateForContract(address _contractAddress, uint256 _endTime) public onlyOwner {
        require(!isLocked, "Cannot modify end dates after lock");
        require(trustedContracts[_contractAddress], "Not a trusted contract");
        
        contractSettings[_contractAddress].end = _endTime;
    }

    function claimReward(address _contractAddress, uint256 _tokenId) public returns (uint256) {
        require(trustedContracts[_contractAddress], "Not a trusted contract.");
        require(contractSettings[_contractAddress].end > block.timestamp, "Time for claiming on that contract has expired.");
        require(iSkellies(_contractAddress).ownerOf(_tokenId) == msg.sender, "Caller does not own the token being claimed for.");

        // compute Bones to be claimed
        uint256 unclaimedReward = computeUnclaimedReward(_contractAddress, _tokenId);

        // update the lastClaim date for tokenId and contractAddress
        bytes32 lastClaimKey = keccak256(abi.encode(_contractAddress, _tokenId));
        lastClaim[lastClaimKey] = block.timestamp;

        // mint the tokens and distribute to msg.sender
        _mint(msg.sender, unclaimedReward);
        emit RewardPaid(msg.sender, unclaimedReward);

        return unclaimedReward;
    }

    function claimRewards(address _contractAddress, uint256[] calldata _tokenIds) public returns (uint256) {
        require(trustedContracts[_contractAddress], "Not a trusted contract.");
        require(contractSettings[_contractAddress].end > block.timestamp, "Time for claiming has expired");

        uint256 totalUnclaimedRewards = 0;

        for(uint256 i = 0; i < _tokenIds.length; i++) {
            uint256 _tokenId = _tokenIds[i];

            require(iSkellies(_contractAddress).ownerOf(_tokenId) == msg.sender, "Caller does not own the token being claimed for.");

            // compute Bones to be claimed
            uint256 unclaimedReward = computeUnclaimedReward(_contractAddress, _tokenId);
            totalUnclaimedRewards = totalUnclaimedRewards + unclaimedReward;

            // update the lastClaim date for tokenId and contractAddress
            bytes32 lastClaimKey = keccak256(abi.encode(_contractAddress, _tokenId));
            lastClaim[lastClaimKey] = block.timestamp;
        }

        // mint the tokens and distribute to msg.sender
        _mint(msg.sender, totalUnclaimedRewards);
        emit RewardPaid(msg.sender, totalUnclaimedRewards);

        return totalUnclaimedRewards;
    }

    function permanentlyLock() public onlyOwner {
        isLocked = true;
    }

    function getUnclaimedRewardAmount(address _contractAddress, uint256 _tokenId) public view returns (uint256) {
        require(trustedContracts[_contractAddress], "Not a trusted contract");

        uint256 unclaimedReward  = computeUnclaimedReward(_contractAddress, _tokenId);
        return unclaimedReward;
    }

    function getUnclaimedRewardsAmount(address _contractAddress, uint256[] calldata _tokenIds) public view returns (uint256) {
        require(trustedContracts[_contractAddress], "Not a trusted contract");

        uint256 totalUnclaimedRewards = 0;

        for(uint256 i = 0; i < _tokenIds.length; i++) {
            totalUnclaimedRewards += computeUnclaimedReward(_contractAddress, _tokenIds[i]);
        }

        return totalUnclaimedRewards;
    }

    function getTotalUnclaimedRewardsForContract(address _contractAddress) public view returns (uint256) {
        require(trustedContracts[_contractAddress], "Not a trusted contract");

        uint256 totalUnclaimedRewards = 0;
        uint256 totalSupply = iSkellies(_contractAddress).totalSupply();

        for(uint256 i = 0; i < totalSupply; i++) {
            totalUnclaimedRewards += computeUnclaimedReward(_contractAddress, i);
        }

        return totalUnclaimedRewards;
    }

    function getLastClaimedTime(address _contractAddress, uint256 _tokenId) public view returns (uint256) {
        require(trustedContracts[_contractAddress], "Not a trusted contract");

        bytes32 lastClaimKey = keccak256(abi.encode(_contractAddress, _tokenId));

        return lastClaim[lastClaimKey];
    }

    function computeAccumulatedReward(uint256 _lastClaimDate, uint256 _baseRate, uint256 currentTime) internal pure returns (uint256) {
        require(currentTime > _lastClaimDate, "Last claim date must be smaller than block timestamp");

        uint256 secondsElapsed = currentTime - _lastClaimDate;
        uint256 accumulatedReward = secondsElapsed * _baseRate / 1 days;

        return accumulatedReward;
    }
    //checks contract and returns an array containing the tokenids owned by the specified address 
    function TokensOfOwner(address _contractAddress, address address_) public view returns (uint[] memory) {
        require(trustedContracts[_contractAddress], "Not a trusted contract"); 
        uint _balance = iSkellies(_contractAddress).balanceOf(address_); // get balance of address
        uint contractMaxToken = iSkellies(_contractAddress).totalSupply(); //total supply of contract
        uint[] memory _tokens = new uint[](_balance); // initialize array 
        uint _index;
            for (uint id = 1; id <= contractMaxToken; id++) {
                if (address_ == iSkellies(_contractAddress).ownerOf(id)) { _tokens[_index] = id; _index++;}
            }
        return _tokens; 
    }
    

    function computeUnclaimedReward(address _contractAddress, uint256 _tokenId) internal view returns (uint256) {
        require(trustedContracts[_contractAddress], "Not a trusted contract");
        
        // Will revert if tokenId does not exist
        iSkellies(_contractAddress).ownerOf(_tokenId);

        // build the hash for lastClaim based on contractAddress and tokenId
        bytes32 lastClaimKey = keccak256(abi.encode(_contractAddress, _tokenId));
        uint256 lastClaimDate = lastClaim[lastClaimKey];
        uint256 baseRate = contractSettings[_contractAddress].baseRate;

        // if there has been a lastClaim, compute the value since lastClaim
        if (lastClaimDate != uint256(0)) {
            return computeAccumulatedReward(lastClaimDate, baseRate, block.timestamp);
        } 
        else {
            // if there has not been a lastClaim, add the initIssuance + computed value since contract startDate
            uint256 totalReward = computeAccumulatedReward(contractSettings[_contractAddress].start, baseRate, block.timestamp) + contractSettings[_contractAddress].initIssuance;

            return totalReward;
        }
    }
}