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• interface IEthicHubStorage
•    - function setAddress(bytes32 _key, add ...
•    - function setUint(bytes32 _key, uint _ ...
•    - function setString(bytes32 _key, stri ...
•    - function setBytes(bytes32 _key, bytes ...
•    - function setBool(bytes32 _key, bool _ ...
•    - function setInt(bytes32 _key, int _va ...
•    - function deleteAddress(bytes32 _key)
•    - function deleteUint(bytes32 _key)
•    - function deleteString(bytes32 _key)
•    - function deleteBytes(bytes32 _key)
•    - function deleteBool(bytes32 _key)
•    - function deleteInt(bytes32 _key)
•    - function getAddress(bytes32 _key)
•    - function getUint(bytes32 _key)
•    - function getString(bytes32 _key)
•    - function getBytes(bytes32 _key)
•    - function getBool(bytes32 _key)
•    - function getInt(bytes32 _key)
• interface IERC20
•    - function totalSupply()
•    - function balanceOf(address account)
•    - function transfer(address recipient, ...
•    - function allowance(address owner, add ...
•    - function approve(address spender, uin ...
•    - function transferFrom(
• library SafeMath
•    - function tryAdd(uint256 a, uint256 b)
•    - function trySub(uint256 a, uint256 b)
•    - function tryMul(uint256 a, uint256 b)
•    - function tryDiv(uint256 a, uint256 b)
•    - function tryMod(uint256 a, uint256 b)
•    - function add(uint256 a, uint256 b)
•    - function sub(uint256 a, uint256 b)
•    - function mul(uint256 a, uint256 b)
•    - function div(uint256 a, uint256 b)
•    - function mod(uint256 a, uint256 b)
•    - function sub(
•    - function div(
•    - function mod(
•    - function _msgSender()
•    - function _msgData()
•    - function owner()
•    - function renounceOwnership()
•    - function transferOwnership(address ne ...
•    - function _setOwner(address newOwner)
•    - function paused()
•    - function _pause()
•    - function _unpause()
•  contract EthicHubLending is Pausab ... *
•    - function setBorrower(address payable ...
•    - function changeInvestorAddress(addres ...
•    - function returnBorrowed()
•    - function deposit(address payable cont ...
•    - function declareProjectNotFunded()
•    - function declareProjectDefault()
•    - function reclaimContributionDefault(a ...
•    - function reclaimContribution(address ...
•    - function reclaimContributionWithInter ...
•    - function reclaimSystemFees()
•    - function reclaimEthicHubTeamFee()
•    - function reclaimLeftover()
•    - function doReclaim(address payable ta ...
•    - function calculatePaymentGoal(uint go ...
•    - function sendFundsToBorrower()
•    - function getDelayDays(uint date)
•    - function getDaysPassedBetweenDates(ui ...
•    - function lendingInterestRatePercentag ...
•    - function investorInterest()
•    - function borrowerReturnAmount()
•    - function isContribPeriodRunning()
•    - function checkInvestorContribution(ad ...
•    - function checkInvestorReturns(address ...
•    - function getUserContributionReclaimSt ...
•    - function changeState(LendingState new ...

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/**
 *Submitted for verification at gnosisscan.io on 2022-08-04
*/

// SPDX-License-Identifier: gpl-3.0
pragma solidity 0.8.3;


/**
 * Interface for the eternal storage.
 * Thanks RocketPool!
 * https://github.com/rocket-pool/rocketpool/blob/master/contracts/interface/RocketStorageInterface.sol
 */
interface IEthicHubStorage {

    //modifier for access in sets and deletes
    modifier onlyEthicHubContracts() {_;}

    // Setters
    function setAddress(bytes32 _key, address _value) external;
    function setUint(bytes32 _key, uint _value) external;
    function setString(bytes32 _key, string calldata _value) external;
    function setBytes(bytes32 _key, bytes calldata _value) external;
    function setBool(bytes32 _key, bool _value) external;
    function setInt(bytes32 _key, int _value) external;
    // Deleters
    function deleteAddress(bytes32 _key) external;
    function deleteUint(bytes32 _key) external;
    function deleteString(bytes32 _key) external;
    function deleteBytes(bytes32 _key) external;
    function deleteBool(bytes32 _key) external;
    function deleteInt(bytes32 _key) external;

    // Getters
    function getAddress(bytes32 _key) external view returns (address);
    function getUint(bytes32 _key) external view returns (uint);
    function getString(bytes32 _key) external view returns (string memory);
    function getBytes(bytes32 _key) external view returns (bytes memory);
    function getBool(bytes32 _key) external view returns (bool);
    function getInt(bytes32 _key) external view returns (int);
}







/**
 * @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);
}





// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.

/**
 * @dev Wrappers over Solidity's arithmetic operations.
 *
 * NOTE: `SafeMath` is no longer needed starting with Solidity 0.8. The compiler
 * now has built in overflow checking.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            uint256 c = a + b;
            if (c < a) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the substraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b > a) return (false, 0);
            return (true, a - b);
        }
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
            // benefit is lost if 'b' is also tested.
            // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
            if (a == 0) return (true, 0);
            uint256 c = a * b;
            if (c / a != b) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a / b);
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a % b);
        }
    }

    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        return a + b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return a - b;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        return a * b;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator.
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return a % b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b <= a, errorMessage);
            return a - b;
        }
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a / b;
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a % b;
        }
    }
}









/**
 * @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;
    }
}


/**
 * @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);
    }
}







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

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

    bool private _paused;

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

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

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

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

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

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




contract EthicHubLending is Pausable, Ownable {
    using SafeMath for uint256;

    enum LendingState {
        Uninitialized,
        AcceptingContributions,
        Funded,
        AwaitingReturn,
        ProjectNotFunded,
        ContributionReturned,
        Default
    }

    uint8 public version;
    IEthicHubStorage public ethicHubStorage;

    mapping(address => Investor) public investors;
    uint256 public investorCount;
    uint256 public reclaimedContributions;
    uint256 public fundingStartTime; // Start time of contribution period in UNIX time
    uint256 public fundingEndTime; // End time of contribution period in UNIX time
    uint256 public totalContributed;

    bool public capReached;

    LendingState public state;

    uint256 public annualInterest;
    uint256 public totalLendingAmount;
    uint256 public lendingDays;
    uint256 public borrowerReturnDays;
    uint256 public maxDelayDays;

    address payable public borrower;
    address public localNode;
    address payable public ethicHubTeam;
    address payable public systemFeesCollector;

    uint256 public ethicHubFee;
    uint256 public systemFees;

    // Interest rate is using base uint 100 and 100% 10000, this means 1% is 100
    // this guarantee we can have a 2 decimal presicion in our calculation
    uint256 public constant interestBaseUint = 100;
    uint256 public constant interestBasePercent = 10000;

    bool public systemFeesReclaimed;
    bool public ethicHubTeamFeeReclaimed;

    uint256 public returnedAmount;

    struct Investor {
        uint256 amount;
        bool isCompensated;
    }

    struct LoanParams {
        uint256 fundingStartTime;
        uint256 fundingEndTime;
        uint256 annualInterest;
        uint256 totalLendingAmount;
        uint256 lendingDays;
        uint256 ethicHubFee;
        uint256 systemFees;
        uint256 maxDelayDays;
    }

    struct Actors {
        address payable borrower;
        address localNode;
        address payable ethicHubTeam;
        address payable systemFeesCollector;
    }

    // Events
    event CapReached(uint endTime);
    event Contribution(uint totalContributed, address indexed investor, uint amount, uint investorsCount);
    event Compensated(address indexed contributor, uint amount);
    event StateChange(uint state);
    event ReturnAmount(address indexed borrower, uint amount);
    event BorrowerChanged(address indexed newBorrower);
    event InvestorChanged(address indexed oldInvestor, address indexed newInvestor);
    event Reclaim(address indexed target, uint256 amount);

    modifier checkIfArbiter() {
        address arbiter = ethicHubStorage.getAddress(keccak256(abi.encodePacked("arbiter", this)));
        require(arbiter == msg.sender, "Sender not authorized");
        _;
    }

    modifier onlyOwnerOrLocalNode() {
        require(localNode == msg.sender || owner() == msg.sender,"Sender not authorized");
        _;
    }

    constructor(
        address _ethicHubStorage,
        LoanParams memory _loanParams,
        Actors memory _actors
    ) Ownable () Pausable () public {
        require(address(_ethicHubStorage) != address(0), "Storage address cannot be zero address");
        ethicHubStorage = IEthicHubStorage(_ethicHubStorage);

        require(_loanParams.fundingEndTime > _loanParams.fundingStartTime, "fundingEndTime should be later than fundingStartTime");
        require(_loanParams.totalLendingAmount > 0, "totalLendingAmount must be > 0");
        require(_loanParams.lendingDays > 0, "lendingDays must be > 0");
        require(_loanParams.annualInterest > 0 && _loanParams.annualInterest < 100, "_annualInterest must be between 0 and 100");
        require(_actors.borrower != address(0), "No borrower set");
        require(_actors.localNode != address(0), "No Local Node set");
        require(_actors.ethicHubTeam != address(0), "No EthicHub Team set");
        require(_actors.systemFeesCollector != address(0), "No System Fees Collector set");
        require(ethicHubStorage.getBool(keccak256(abi.encodePacked("user", "representative", _actors.borrower))), "Borrower not registered representative");
        require(ethicHubStorage.getBool(keccak256(abi.encodePacked("user", "localNode", _actors.localNode))), "Local Node is not registered");

        version = 11;
        reclaimedContributions = 0;
        borrowerReturnDays = 0;

        maxDelayDays = _loanParams.maxDelayDays;
        annualInterest = _loanParams.annualInterest;
        totalLendingAmount = _loanParams.totalLendingAmount;
        lendingDays = _loanParams.lendingDays;
        ethicHubFee = _loanParams.ethicHubFee;
        systemFees = _loanParams.systemFees;
        fundingStartTime = _loanParams.fundingStartTime;
        fundingEndTime = _loanParams.fundingEndTime;

        borrower = _actors.borrower;
        localNode = _actors.localNode;
        systemFeesCollector = _actors.systemFeesCollector;
        ethicHubTeam = _actors.ethicHubTeam;

        state = LendingState.AcceptingContributions;
    }

    function setBorrower(address payable _borrower) external checkIfArbiter {
        require(_borrower != address(0), "No borrower set");
        require(ethicHubStorage.getBool(keccak256(abi.encodePacked("user", "representative", _borrower))), "Borrower not registered representative");

        borrower = _borrower;

        emit BorrowerChanged(borrower);
    }

    function changeInvestorAddress(address _oldInvestor, address payable _newInvestor) external checkIfArbiter {
        require(_newInvestor != address(0));
        require(ethicHubStorage.getBool(keccak256(abi.encodePacked("user", "investor", _newInvestor))));
        require(investors[_oldInvestor].amount != 0, "OldInvestor should have invested in this project");
        require(
            investors[_newInvestor].amount == 0,
            "newInvestor should not have invested anything"
        );

        investors[_newInvestor].amount = investors[_oldInvestor].amount;
        investors[_newInvestor].isCompensated = investors[_oldInvestor].isCompensated;

        delete investors[_oldInvestor];

        emit InvestorChanged(_oldInvestor, _newInvestor);
    }

    function returnBorrowed() external payable {
        require(msg.sender == borrower, "In state AwaitingReturn only borrower can contribute");
        require(state == LendingState.AwaitingReturn, "State is not AwaitingReturn");

        bool projectRepayed = false;
        uint excessRepayment = 0;
        uint newReturnedAmount = 0;

        emit ReturnAmount(borrower, msg.value);

        (newReturnedAmount, projectRepayed, excessRepayment) = calculatePaymentGoal(borrowerReturnAmount(), returnedAmount, msg.value);

        returnedAmount = newReturnedAmount;

        if (projectRepayed == true) {
            borrowerReturnDays = getDaysPassedBetweenDates(fundingEndTime, block.timestamp);
            changeState(LendingState.ContributionReturned);
        }

        if (excessRepayment > 0) {
            payable(borrower).call{value: excessRepayment}('');
        }
    }

    // @notice Function to participate in contribution period
    //  Amounts from the same address should be added up
    //  If cap is reached, end time should be modified
    //  Funds should be transferred into multisig wallet
    // @param contributor Address
    function deposit(address payable contributor) external payable whenNotPaused {
        require(
            ethicHubStorage.getBool(keccak256(abi.encodePacked("user", "investor", contributor))),
            "Contributor is not registered lender"
        );
        require(state == LendingState.AcceptingContributions, "state is not AcceptingContributions");
        require(isContribPeriodRunning(), "can't contribute outside contribution period");

        uint oldTotalContributed = totalContributed;
        uint newTotalContributed = 0;
        uint excessContribAmount = 0;

        (newTotalContributed, capReached, excessContribAmount) = calculatePaymentGoal(totalLendingAmount, oldTotalContributed, msg.value);

        totalContributed = newTotalContributed;

        if (capReached) {
            fundingEndTime = block.timestamp;
            emit CapReached(fundingEndTime);
            changeState(LendingState.Funded);
        }

        if (investors[contributor].amount == 0) {
            investorCount = investorCount.add(1);
        }

        if (excessContribAmount > 0) {
            payable(contributor).call{value:excessContribAmount}('');
            investors[contributor].amount = investors[contributor].amount.add(msg.value).sub(excessContribAmount);
            emit Contribution(newTotalContributed, contributor, msg.value.sub(excessContribAmount), investorCount);
        } else {
            investors[contributor].amount = investors[contributor].amount.add(msg.value);
            emit Contribution(newTotalContributed, contributor, msg.value, investorCount);
        }
    }

    /**
     * After the contribution period ends unsuccesfully, this method enables the contributor
     *  to retrieve their contribution
     */
    function declareProjectNotFunded() external onlyOwnerOrLocalNode {
        require(totalContributed < totalLendingAmount);
        require(state == LendingState.AcceptingContributions);
        require(block.timestamp > fundingEndTime);

        changeState(LendingState.ProjectNotFunded);
    }

    function declareProjectDefault() external onlyOwnerOrLocalNode {
        require(state == LendingState.AwaitingReturn);
        require(getDelayDays(block.timestamp) >= maxDelayDays);
        changeState(LendingState.Default);
    }


    /**
     * Method to reclaim contribution after project is declared default (% of partial funds)
     * @param  beneficiary the contributor
     *
     */
    function reclaimContributionDefault(address payable beneficiary) external {
        require(state == LendingState.Default);
        require(!investors[beneficiary].isCompensated);

        // contribution = contribution * partial_funds / total_funds
        uint256 contribution = checkInvestorReturns(beneficiary);

        require(contribution > 0);

        investors[beneficiary].isCompensated = true;
        reclaimedContributions = reclaimedContributions.add(1);

        doReclaim(beneficiary, contribution);
    }

    /**
     * Method to reclaim contribution after a project is declared as not funded
     * @param  beneficiary the contributor
     *
     */
    function reclaimContribution(address payable beneficiary) external {
        require(state == LendingState.ProjectNotFunded, "State is not ProjectNotFunded");
        require(!investors[beneficiary].isCompensated, "Contribution already reclaimed");
        uint256 contribution = investors[beneficiary].amount;
        require(contribution > 0, "Contribution is 0");

        investors[beneficiary].isCompensated = true;
        reclaimedContributions = reclaimedContributions.add(1);

        doReclaim(beneficiary, contribution);
    }

    function reclaimContributionWithInterest(address payable beneficiary) external {
        require(state == LendingState.ContributionReturned, "State is not ContributionReturned");
        require(!investors[beneficiary].isCompensated, "Lender already compensated");
        uint256 contribution = checkInvestorReturns(beneficiary);
        require(contribution > 0, "Contribution is 0");

        investors[beneficiary].isCompensated = true;
        reclaimedContributions = reclaimedContributions.add(1);

        doReclaim(beneficiary, contribution);
    }

    function reclaimSystemFees() external {
        require(state == LendingState.AwaitingReturn || state == LendingState.ContributionReturned, "State is not AwaitingReturn or ContributionReturned");
        require(systemFeesReclaimed == false, "Local Node's fee already reclaimed");
        uint256 fee = totalLendingAmount.mul(systemFees).mul(interestBaseUint).div(interestBasePercent);
        require(fee > 0, "Local Node's team fee is 0");

        systemFeesReclaimed = true;

        doReclaim(systemFeesCollector, fee);
    }

    function reclaimEthicHubTeamFee() external {
        require(state == LendingState.AwaitingReturn || state == LendingState.ContributionReturned, "State is not AwaitingReturn or ContributionReturned");
        require(ethicHubTeamFeeReclaimed == false, "EthicHub team's fee already reclaimed");
        uint256 fee = totalLendingAmount.mul(ethicHubFee).mul(interestBaseUint).div(interestBasePercent);
        require(fee > 0, "EthicHub's team fee is 0");

        ethicHubTeamFeeReclaimed = true;

        doReclaim(ethicHubTeam, fee);
    }

    function reclaimLeftover() external checkIfArbiter {
        require(state == LendingState.ContributionReturned || state == LendingState.Default, "State is not ContributionReturned or Default");
        require(systemFeesReclaimed, "Local Node fee is not reclaimed");
        require(ethicHubTeamFeeReclaimed, "Team fee is not reclaimed");
        require(investorCount == reclaimedContributions, "Not all investors have reclaimed their share");

        doReclaim(ethicHubTeam, address(this).balance);
    }

    function doReclaim(address payable target, uint256 amount) internal {
        uint256 contractBalance = address(this).balance;
        uint256 reclaimAmount = (contractBalance < amount) ? contractBalance : amount;
        
        payable(target).call{value:reclaimAmount}('');

        emit Reclaim(target, reclaimAmount);
    }

    

    /**
     * Calculates if a target value is reached after increment, and by how much it was surpassed.
     * @param goal the target to achieve
     * @param oldTotal the total so far after the increment
     * @param contribValue the increment
     * @return (the incremented count, not bigger than max), (goal has been reached), (excess to return)
     */
    function calculatePaymentGoal(uint goal, uint oldTotal, uint contribValue) internal pure returns(uint, bool, uint) {
        uint newTotal = oldTotal.add(contribValue);
        bool goalReached = false;
        uint excess = 0;
        if (newTotal >= goal && oldTotal < goal) {
            goalReached = true;
            excess = newTotal.sub(goal);
            contribValue = contribValue.sub(excess);
            newTotal = goal;
        }
        return (newTotal, goalReached, excess);
    }

    function sendFundsToBorrower() external onlyOwnerOrLocalNode {
        // Waiting for Exchange
        require(state == LendingState.Funded, "State has to be AcceptingContributions");
        uint256 systemFee = totalLendingAmount.mul(systemFees).mul(interestBaseUint).div(interestBasePercent);
        uint256 teamFee = totalLendingAmount.mul(ethicHubFee).mul(interestBaseUint).div(interestBasePercent);
        changeState(LendingState.AwaitingReturn);
        payable(borrower).call{value: totalContributed.sub(systemFee).sub(teamFee)}('');
    }

    /**
    * Calculates days passed after defaulting
    * @param date timestamp to calculate days
    * @return day number
    */
    function getDelayDays(uint date) public view returns(uint) {
        uint lendingDaysSeconds = lendingDays * 1 days;
        uint defaultTime = fundingEndTime.add(lendingDaysSeconds);

        if (date < defaultTime) {
            return 0;
        } else {
            return getDaysPassedBetweenDates(defaultTime, date);
        }
    }

    /**
    * Calculates days passed between two dates in seconds
    * @param firstDate timestamp
    * @param lastDate timestamp
    * @return days passed
    */
    function getDaysPassedBetweenDates(uint firstDate, uint lastDate) public pure returns(uint) {
        require(firstDate <= lastDate, "lastDate must be bigger than firstDate");
        return lastDate.sub(firstDate).div(60).div(60).div(24);
    }

    // lendingInterestRate with 2 decimal
    // 15 * (lending days)/ 365 + 4% system fee + 3% LendingDev fee
    function lendingInterestRatePercentage() public view returns(uint256){
        return annualInterest.mul(interestBaseUint)
            // current days
            .mul(getDaysPassedBetweenDates(fundingEndTime, block.timestamp)).div(365)
            .add(systemFees.mul(interestBaseUint))
            .add(ethicHubFee.mul(interestBaseUint))
            .add(interestBasePercent);
    }

    // lendingInterestRate with 2 decimal
    function investorInterest() public view returns(uint256){
        return annualInterest.mul(interestBaseUint).mul(borrowerReturnDays).div(365).add(interestBasePercent);
    }

    function borrowerReturnAmount() public view returns(uint256) {
        uint interestGenerated = annualInterest.mul(interestBaseUint).mul(getDaysPassedBetweenDates(fundingEndTime, block.timestamp)).div(365).add(interestBasePercent);
        return totalLendingAmount.mul(interestGenerated).div(interestBasePercent);
    }


    function isContribPeriodRunning() public view returns(bool) {
        return fundingStartTime <= block.timestamp && fundingEndTime > block.timestamp && !capReached;
    }

    function checkInvestorContribution(address investor) public view returns(uint256){
        return investors[investor].amount;
    }

    function checkInvestorReturns(address investor) public view returns(uint256) {
        uint256 investorAmount = 0;
        if (state == LendingState.ContributionReturned) {
            investorAmount = investors[investor].amount;
            return investorAmount.mul(investorInterest()).div(interestBasePercent);
        } else if (state == LendingState.Default){
            investorAmount = investors[investor].amount;
            // contribution = contribution * partial_funds / total_funds
            return investorAmount.mul(returnedAmount).div(totalLendingAmount);
        } else {
            return 0;
        }
    }

    function getUserContributionReclaimStatus(address userAddress) public view returns(bool isCompensated){
        return investors[userAddress].isCompensated;
    }

    function changeState(LendingState newState) internal {
        state = newState;
        emit StateChange(uint(newState));
    }
}

• No Contract Security Audit Submitted- Submit Audit Here

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