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// SPDX-License-Identifier: AGPL-3.0-or-later
pragma solidity 0.7.5;

import "./lib/IERC20.sol";
import "./lib/SafeMath.sol";
import "./lib/Ownable.sol";
import "./SolisPresale.sol";
import "./lib/ReentrancyGuard.sol";
import "./SolisLuxFarm.sol";
/**
 * @title SolisPresaleDistributor
 * @notice This contract handles the distribution of Solis and stSolis tokens to presale participants
 * @dev This contract reads participant data from the original SolisPresale contract
 */
contract SolisPresaleDistributor is Ownable, ReentrancyGuard {
    using SafeMath for uint256;
    
    // Original presale contract
    SolisPresale public presaleContract;
    
    // Token contracts
    IERC20 public solisToken;
    IERC20 public stSolisToken;

    SolisLuxFarm public solisLuxFarmContract;
    
    // Mapping to track if an address has claimed their tokens
    mapping(address => bool) public hasClaimed;
    
    // Distribution state
    bool public distributionEnabled;
    
    // Track total deposited tokens
    uint256 public totalSolisDeposited;
    uint256 public totalStSolisDeposited;
    
    // Reentrancy guard
    bool private _locked;
    
    // Events
    event DistributionStateChanged(bool enabled);
    event TokensClaimed(address indexed participant, uint256 solisAmount, uint256 stSolisAmount);
    event TokensDeposited(address token, uint256 amount);
    
    /**
     * @dev Constructor
     * @param _presaleContract Address of the original presale contract
     * @param _solisToken Address of the Solis token
     * @param _stSolisToken Address of the stSolis token
     * @param _luxFarmContract Address of the LuxFarm contract
     */
    constructor(
        address _presaleContract,
        address _solisToken,
        address _stSolisToken,
        address _luxFarmContract
    ) {
        require(_presaleContract != address(0), "Invalid presale contract address");
        require(_solisToken != address(0), "Invalid Solis token address");
        require(_stSolisToken != address(0), "Invalid stSolis token address");
        require(_luxFarmContract != address(0), "Invalid luxFarm contract address");
        
        presaleContract = SolisPresale(_presaleContract);
        solisToken = IERC20(_solisToken);
        stSolisToken = IERC20(_stSolisToken);
        solisLuxFarmContract = SolisLuxFarm(_luxFarmContract);
    }
    
    /**
     * @dev Enable or disable the distribution
     * @param _enabled New state for distribution
     */
    function setDistributionEnabled(bool _enabled) external onlyOwner {
        distributionEnabled = _enabled;
        emit DistributionStateChanged(_enabled);
    }
    
    /**
     * @dev Deposit tokens for distribution
     * @param _token Address of the token to deposit
     * @param _amount Amount of tokens to deposit
     */
    function depositTokens(address _token, uint256 _amount) external onlyOwner {
        require(_token == address(solisToken) || _token == address(stSolisToken), "Invalid token");
        require(_amount > 0, "Amount must be greater than 0");
        
        // Transfer tokens from owner to this contract
        require(
            IERC20(_token).transferFrom(msg.sender, address(this), _amount),
            "Token transfer failed"
        );
        
        // Update total deposited amounts
        if (_token == address(solisToken)) {
            totalSolisDeposited = totalSolisDeposited.add(_amount);
        } else {
            totalStSolisDeposited = totalStSolisDeposited.add(_amount);
        }
        
        emit TokensDeposited(_token, _amount);
    }
    
    /**
     * @dev Calculate claimable amount for Solis and stSolis separately for a participant
     * @param _participant Address of the participant
     * @return solisAmount Amount of Solis tokens claimable
     * @return stSolisAmount Amount of stSolis tokens claimable
     */
    function calculateClaimableAmounts(address _participant) public view returns (uint256 solisAmount, uint256 stSolisAmount) {
        // Get the contribution amount from the presale contract
        uint256 contribution = presaleContract.contributions(_participant);
        if (contribution == 0) {
            return (0, 0);
        }
        
        // Get the total presale amount from the presale contract
        uint256 totalPresaleAmount = presaleContract.totalPresaleAmount();
        if (totalPresaleAmount == 0) {
            return (0, 0);
        }
        
        // Calculate Solis and stSolis amounts independently based on deposited amounts
        solisAmount = contribution.mul(totalSolisDeposited).div(totalPresaleAmount);
        stSolisAmount = contribution.mul(totalStSolisDeposited).div(totalPresaleAmount);
        
        return (solisAmount, stSolisAmount);
    }
    
    /**
     * @dev Claim Solis and stSolis tokens based on contribution in the presale
     */
    function claimTokens() external nonReentrant {
        require(distributionEnabled, "Distribution is not enabled");
        require(!hasClaimed[msg.sender], "Already claimed");
        
        // Check if the sender is a participant in the presale
        uint256 contribution = presaleContract.contributions(msg.sender);
        require(contribution > 0, "Not a presale participant");
        
        // Calculate claimable amounts independently
        (uint256 solisAmount, uint256 stSolisAmount) = calculateClaimableAmounts(msg.sender);
        require(solisAmount > 0 || stSolisAmount > 0, "Nothing to claim");
        
        // Check if there are enough tokens in the contract to fulfill the claim
        require(solisToken.balanceOf(address(this)) >= solisAmount, "Insufficient Solis balance");
        require(stSolisToken.balanceOf(address(this)) >= stSolisAmount, "Insufficient stSolis balance");
        
        // Mark as claimed
        hasClaimed[msg.sender] = true;
        
        // Transfer tokens to participant
        if (solisAmount > 0) {
            require(
                solisToken.transfer(msg.sender, solisAmount),
                "Solis transfer failed"
            );
        }
        
        if (stSolisAmount > 0) {
            require(
                stSolisToken.transfer(msg.sender, stSolisAmount),
                "stSolis transfer failed"
            );
            solisLuxFarmContract.setInitialClaimTime(msg.sender);
        }
        
        emit TokensClaimed(msg.sender, solisAmount, stSolisAmount);
    }
    
    /**
     * @dev Check if a participant can claim tokens
     * @param _participant Address of the participant
     * @return bool True if the participant can claim tokens
     */
    function canClaim(address _participant) external view returns (bool) {
        if (hasClaimed[_participant]) {
            return false;
        }
        
        uint256 contribution = presaleContract.contributions(_participant);
        return contribution > 0;
    }
    
    /**
     * @dev Emergency withdraw function for owner to recover tokens
     * @param _token Address of the token to withdraw
     */
    function emergencyWithdraw(address _token) external onlyOwner {
        IERC20 token = IERC20(_token);
        uint256 balance = token.balanceOf(address(this));
        require(balance > 0, "No tokens to withdraw");
        require(token.transfer(owner(), balance), "Transfer failed");
    }
}

// SPDX-License-Identifier: AGPL-3.0-or-later
pragma solidity 0.7.5;

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
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies in extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

        uint256 size;
        // solhint-disable-next-line no-inline-assembly
        assembly {
            size := extcodesize(account)
        }
        return size > 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}
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(
            address(this).balance >= amount,
            "Address: insufficient balance"
        );

        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
        (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).
     *
     * 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");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.call{value: value}(
            data
        );
        return _verifyCallResult(success, returndata, errorMessage);
    }

    function _functionCallWithValue(
        address target,
        bytes memory data,
        uint256 weiValue,
        string memory errorMessage
    ) private returns (bytes memory) {
        require(isContract(target), "Address: call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.call{value: weiValue}(
            data
        );
        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

                // solhint-disable-next-line no-inline-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(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");

        // solhint-disable-next-line avoid-low-level-calls
        (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 v3.3._
     */
    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 v3.3._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    function _verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) private 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

                // solhint-disable-next-line no-inline-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }

    function addressToString(
        address _address
    ) internal pure returns (string memory) {
        bytes32 _bytes = bytes32(uint256(_address));
        bytes memory HEX = "0123456789abcdef";
        bytes memory _addr = new bytes(42);

        _addr[0] = "0";
        _addr[1] = "x";

        for (uint256 i = 0; i < 20; i++) {
            _addr[2 + i * 2] = HEX[uint8(_bytes[i + 12] >> 4)];
            _addr[3 + i * 2] = HEX[uint8(_bytes[i + 12] & 0x0f)];
        }

        return string(_addr);
    }
}

// SPDX-License-Identifier: AGPL-3.0-or-later
pragma solidity 0.7.5;
import "./SafeMath.sol";

library Counters {
    using SafeMath for uint256;

    struct Counter {
        uint256 _value; // default: 0
    }

    function current(Counter storage counter) internal view returns (uint256) {
        return counter._value;
    }

    function increment(Counter storage counter) internal {
        counter._value += 1;
    }

    function decrement(Counter storage counter) internal {
        counter._value = counter._value.sub(1);
    }
}

// SPDX-License-Identifier: AGPL-3.0-or-later
pragma solidity 0.7.5;

library EnumerableSet {
    // To implement this library for multiple types with as little code
    // repetition as possible, we write it in terms of a generic Set type with
    // bytes32 values.
    // The Set implementation uses private functions, and user-facing
    // implementations (such as AddressSet) are just wrappers around the
    // underlying Set.
    // This means that we can only create new EnumerableSets for types that fit
    // in bytes32.
    struct Set {
        // Storage of set values
        bytes32[] _values;
        // Position of the value in the `values` array, plus 1 because index 0
        // means a value is not in the set.
        mapping(bytes32 => uint256) _indexes;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function _add(Set storage set, bytes32 value) private returns (bool) {
        if (!_contains(set, value)) {
            set._values.push(value);
            // The value is stored at length-1, but we add 1 to all indexes
            // and use 0 as a sentinel value
            set._indexes[value] = set._values.length;
            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function _remove(Set storage set, bytes32 value) private returns (bool) {
        // We read and store the value's index to prevent multiple reads from the same storage slot
        uint256 valueIndex = set._indexes[value];

        if (valueIndex != 0) {
            // Equivalent to contains(set, value)
            // To delete an element from the _values array in O(1), we swap the element to delete with the last one in
            // the array, and then remove the last element (sometimes called as 'swap and pop').
            // This modifies the order of the array, as noted in {at}.

            uint256 toDeleteIndex = valueIndex - 1;
            uint256 lastIndex = set._values.length - 1;

            // When the value to delete is the last one, the swap operation is unnecessary. However, since this occurs
            // so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement.

            bytes32 lastvalue = set._values[lastIndex];

            // Move the last value to the index where the value to delete is
            set._values[toDeleteIndex] = lastvalue;
            // Update the index for the moved value
            set._indexes[lastvalue] = toDeleteIndex + 1; // All indexes are 1-based

            // Delete the slot where the moved value was stored
            set._values.pop();

            // Delete the index for the deleted slot
            delete set._indexes[value];

            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function _contains(
        Set storage set,
        bytes32 value
    ) private view returns (bool) {
        return set._indexes[value] != 0;
    }

    /**
     * @dev Returns the number of values on the set. O(1).
     */
    function _length(Set storage set) private view returns (uint256) {
        return set._values.length;
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function _at(
        Set storage set,
        uint256 index
    ) private view returns (bytes32) {
        require(
            set._values.length > index,
            "EnumerableSet: index out of bounds"
        );
        return set._values[index];
    }

    function _getValues(
        Set storage set_
    ) private view returns (bytes32[] storage) {
        return set_._values;
    }

    // TODO needs insert function that maintains order.
    // TODO needs NatSpec documentation comment.
    /**
     * Inserts new value by moving existing value at provided index to end
     * of array and setting provided value at provided index
     */
    function _insert(
        Set storage set_,
        uint256 index_,
        bytes32 valueToInsert_
    ) private returns (bool) {
        require(set_._values.length > index_);
        require(
            !_contains(set_, valueToInsert_),
            "Remove value you wish to insert if you wish to reorder array."
        );
        bytes32 existingValue_ = _at(set_, index_);
        set_._values[index_] = valueToInsert_;
        return _add(set_, existingValue_);
    }

    struct Bytes4Set {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(Bytes4Set storage set, bytes4 value) internal returns (bool) {
        return _add(set._inner, value);
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(
        Bytes4Set storage set,
        bytes4 value
    ) internal returns (bool) {
        return _remove(set._inner, value);
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(
        Bytes4Set storage set,
        bytes4 value
    ) internal view returns (bool) {
        return _contains(set._inner, value);
    }

    /**
     * @dev Returns the number of values on the set. O(1).
     */
    function length(Bytes4Set storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(
        Bytes4Set storage set,
        uint256 index
    ) internal view returns (bytes4) {
        return bytes4(_at(set._inner, index));
    }

    function getValues(
        Bytes4Set storage set_
    ) internal view returns (bytes4[] memory) {
        bytes4[] memory bytes4Array_;
        for (
            uint256 iteration_ = 0;
            _length(set_._inner) > iteration_;
            iteration_++
        ) {
            bytes4Array_[iteration_] = bytes4(_at(set_._inner, iteration_));
        }
        return bytes4Array_;
    }

    function insert(
        Bytes4Set storage set_,
        uint256 index_,
        bytes4 valueToInsert_
    ) internal returns (bool) {
        return _insert(set_._inner, index_, valueToInsert_);
    }

    struct Bytes32Set {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(
        Bytes32Set storage set,
        bytes32 value
    ) internal returns (bool) {
        return _add(set._inner, value);
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(
        Bytes32Set storage set,
        bytes32 value
    ) internal returns (bool) {
        return _remove(set._inner, value);
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(
        Bytes32Set storage set,
        bytes32 value
    ) internal view returns (bool) {
        return _contains(set._inner, value);
    }

    /**
     * @dev Returns the number of values on the set. O(1).
     */
    function length(Bytes32Set storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(
        Bytes32Set storage set,
        uint256 index
    ) internal view returns (bytes32) {
        return _at(set._inner, index);
    }

    function getValues(
        Bytes32Set storage set_
    ) internal view returns (bytes4[] memory) {
        bytes4[] memory bytes4Array_;

        for (
            uint256 iteration_ = 0;
            _length(set_._inner) >= iteration_;
            iteration_++
        ) {
            bytes4Array_[iteration_] = bytes4(at(set_, iteration_));
        }

        return bytes4Array_;
    }

    function insert(
        Bytes32Set storage set_,
        uint256 index_,
        bytes32 valueToInsert_
    ) internal returns (bool) {
        return _insert(set_._inner, index_, valueToInsert_);
    }

    // AddressSet
    struct AddressSet {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(
        AddressSet storage set,
        address value
    ) internal returns (bool) {
        return _add(set._inner, bytes32(uint256(value)));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(
        AddressSet storage set,
        address value
    ) internal returns (bool) {
        return _remove(set._inner, bytes32(uint256(value)));
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(
        AddressSet storage set,
        address value
    ) internal view returns (bool) {
        return _contains(set._inner, bytes32(uint256(value)));
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(AddressSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(
        AddressSet storage set,
        uint256 index
    ) internal view returns (address) {
        return address(uint256(_at(set._inner, index)));
    }

    /**
     * TODO Might require explicit conversion of bytes32[] to address[].
     *  Might require iteration.
     */
    function getValues(
        AddressSet storage set_
    ) internal view returns (address[] memory) {
        address[] memory addressArray;

        for (
            uint256 iteration_ = 0;
            _length(set_._inner) >= iteration_;
            iteration_++
        ) {
            addressArray[iteration_] = at(set_, iteration_);
        }

        return addressArray;
    }

    function insert(
        AddressSet storage set_,
        uint256 index_,
        address valueToInsert_
    ) internal returns (bool) {
        return _insert(set_._inner, index_, bytes32(uint256(valueToInsert_)));
    }

    // UintSet

    struct UintSet {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(UintSet storage set, uint256 value) internal returns (bool) {
        return _add(set._inner, bytes32(value));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(
        UintSet storage set,
        uint256 value
    ) internal returns (bool) {
        return _remove(set._inner, bytes32(value));
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(
        UintSet storage set,
        uint256 value
    ) internal view returns (bool) {
        return _contains(set._inner, bytes32(value));
    }

    /**
     * @dev Returns the number of values on the set. O(1).
     */
    function length(UintSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(
        UintSet storage set,
        uint256 index
    ) internal view returns (uint256) {
        return uint256(_at(set._inner, index));
    }

    struct UInt256Set {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(
        UInt256Set storage set,
        uint256 value
    ) internal returns (bool) {
        return _add(set._inner, bytes32(value));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(
        UInt256Set storage set,
        uint256 value
    ) internal returns (bool) {
        return _remove(set._inner, bytes32(value));
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(
        UInt256Set storage set,
        uint256 value
    ) internal view returns (bool) {
        return _contains(set._inner, bytes32(value));
    }

    /**
     * @dev Returns the number of values on the set. O(1).
     */
    function length(UInt256Set storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(
        UInt256Set storage set,
        uint256 index
    ) internal view returns (uint256) {
        return uint256(_at(set._inner, index));
    }
}

// SPDX-License-Identifier: AGPL-3.0-or-later
pragma solidity 0.7.5;

import "./IERC20.sol";
import "./SafeMath.sol";

abstract contract ERC20 is IERC20 {
    using SafeMath for uint256;

    // TODO comment actual hash value.
    bytes32 private constant ERC20TOKEN_ERC1820_INTERFACE_ID =
        keccak256("ERC20Token");

    // Present in ERC777
    mapping(address => uint256) internal _balances;

    // Present in ERC777
    mapping(address => mapping(address => uint256)) internal _allowances;

    // Present in ERC777
    uint256 internal _totalSupply;

    // Present in ERC777
    string internal _name;

    // Present in ERC777
    string internal _symbol;

    // Present in ERC777
    uint8 internal _decimals;

    constructor(string memory name_, string memory symbol_, uint8 decimals_) {
        _name = name_;
        _symbol = symbol_;
        _decimals = decimals_;
    }

    function name() public view returns (string memory) {
        return _name;
    }

    function symbol() public view returns (string memory) {
        return _symbol;
    }

    function decimals() public view override returns (uint8) {
        return _decimals;
    }

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

    function balanceOf(
        address account
    ) public view virtual override returns (uint256) {
        return _balances[account];
    }

    function transfer(
        address recipient,
        uint256 amount
    ) public virtual override returns (bool) {
        _transfer(msg.sender, recipient, amount);
        return true;
    }

    function allowance(
        address owner,
        address spender
    ) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }

    function approve(
        address spender,
        uint256 amount
    ) public virtual override returns (bool) {
        _approve(msg.sender, spender, amount);
        return true;
    }

    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) public virtual override returns (bool) {
        _transfer(sender, recipient, amount);
        _approve(
            sender,
            msg.sender,
            _allowances[sender][msg.sender].sub(
                amount,
                "ERC20: transfer amount exceeds allowance"
            )
        );
        return true;
    }

    function increaseAllowance(
        address spender,
        uint256 addedValue
    ) public virtual returns (bool) {
        _approve(
            msg.sender,
            spender,
            _allowances[msg.sender][spender].add(addedValue)
        );
        return true;
    }

    function decreaseAllowance(
        address spender,
        uint256 subtractedValue
    ) public virtual returns (bool) {
        _approve(
            msg.sender,
            spender,
            _allowances[msg.sender][spender].sub(
                subtractedValue,
                "ERC20: decreased allowance below zero"
            )
        );
        return true;
    }

    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);

        _balances[sender] = _balances[sender].sub(
            amount,
            "ERC20: transfer amount exceeds balance"
        );
        _balances[recipient] = _balances[recipient].add(amount);
        emit Transfer(sender, recipient, amount);
    }

    function _mint(address account_, uint256 amount_) internal virtual {
        require(account_ != address(0), "ERC20: mint to the zero address");
        _beforeTokenTransfer(address(this), account_, amount_);
        _totalSupply = _totalSupply.add(amount_);
        _balances[account_] = _balances[account_].add(amount_);
        emit Transfer(address(this), account_, amount_);
    }

    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");

        _beforeTokenTransfer(account, address(0), amount);

        _balances[account] = _balances[account].sub(
            amount,
            "ERC20: burn amount exceeds balance"
        );
        _totalSupply = _totalSupply.sub(amount);
        emit Transfer(account, address(0), amount);
    }

    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);
    }

    function _beforeTokenTransfer(
        address from_,
        address to_,
        uint256 amount_
    ) internal virtual {}
}

// SPDX-License-Identifier: AGPL-3.0-or-later
pragma solidity 0.7.5;

import "./IERC20.sol";
import "./IERC2612Permit.sol";
import "./Counters.sol";
import "./ERC20.sol";

abstract contract ERC20Permit is ERC20, IERC2612Permit {
    using Counters for Counters.Counter;

    mapping(address => Counters.Counter) private _nonces;

    // keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)");
    bytes32 public constant PERMIT_TYPEHASH =
        0x6e71edae12b1b97f4d1f60370fef10105fa2faae0126114a169c64845d6126c9;

    bytes32 public DOMAIN_SEPARATOR;

    constructor() {
        uint256 chainID;
        assembly {
            chainID := chainid()
        }

        DOMAIN_SEPARATOR = keccak256(
            abi.encode(
                keccak256(
                    "EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"
                ),
                keccak256(bytes(name())),
                keccak256(bytes("1")), // Version
                chainID,
                address(this)
            )
        );
    }

    /**
     * @dev See {IERC2612Permit-permit}.
     *
     */
    function permit(
        address owner,
        address spender,
        uint256 amount,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) public virtual override {
        require(block.timestamp <= deadline, "Permit: expired deadline");

        bytes32 hashStruct = keccak256(
            abi.encode(
                PERMIT_TYPEHASH,
                owner,
                spender,
                amount,
                _nonces[owner].current(),
                deadline
            )
        );

        bytes32 _hash = keccak256(
            abi.encodePacked(uint16(0x1901), DOMAIN_SEPARATOR, hashStruct)
        );

        address signer = ecrecover(_hash, v, r, s);
        require(
            signer != address(0) && signer == owner,
            "ZeroSwapPermit: Invalid signature"
        );

        _nonces[owner].increment();
        _approve(owner, spender, amount);
    }

    /**
     * @dev See {IERC2612Permit-nonces}.
     */
    function nonces(address owner) public view override returns (uint256) {
        return _nonces[owner].current();
    }
}

// SPDX-License-Identifier: AGPL-3.0-or-later
pragma solidity 0.7.5;

interface IERC20 {
    function decimals() external view returns (uint8);

    /**
     * @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
    );
}

// SPDX-License-Identifier: AGPL-3.0-or-later
pragma solidity 0.7.5;

interface IERC20Mintable {
    function mint(address account, uint256 amount) external;
}

// SPDX-License-Identifier: AGPL-3.0-or-later
pragma solidity 0.7.5;

interface IERC2612Permit {
    function permit(
        address owner,
        address spender,
        uint256 amount,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

    function nonces(address owner) external view returns (uint256);
}

// SPDX-License-Identifier: AGPL-3.0-or-later
pragma solidity 0.7.5;

interface IOwnable {
    function owner() external view returns (address);

    function renounceOwnership() external;

    function transferOwnership(address newOwner_) external;
}

// SPDX-License-Identifier: AGPL-3.0-or-later
pragma solidity 0.7.5;

interface IOwnableManagement {
    function manager() external view returns (address);

    function renounceManagement() external;

    function pushManagement(address newOwner_) external;

    function pullManagement() external;
}

// SPDX-License-Identifier: AGPL-3.0-or-later
pragma solidity 0.7.5;

interface IStSolis {
    function rebase(uint256 profit_, uint256 epoch_) external returns (uint256);
    function circulatingSupply() external view returns (uint);
    function balanceOf(address who) external view returns (uint);
    function gonsForBalance( uint amount ) external view returns ( uint );
    function balanceForGons( uint gons ) external view returns ( uint );
    function index() external view returns (uint);
}

// SPDX-License-Identifier: AGPL-3.0-or-later
pragma solidity 0.7.5;
import "./IOwnable.sol";

contract Ownable is IOwnable {
    address internal _owner;

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

    constructor() {
        _owner = msg.sender;
        emit OwnershipTransferred(address(0), _owner);
    }

    function owner() public view override returns (address) {
        return _owner;
    }

    modifier onlyOwner() {
        require(_owner == msg.sender, "Ownable: caller is not the owner");
        _;
    }

    function renounceOwnership() public virtual override onlyOwner {
        emit OwnershipTransferred(_owner, address(0));
        _owner = address(0);
    }

    function transferOwnership(
        address newOwner_
    ) public virtual override onlyOwner {
        require(
            newOwner_ != address(0),
            "Ownable: new owner is the zero address"
        );
        emit OwnershipTransferred(_owner, newOwner_);
        _owner = newOwner_;
    }
}

// SPDX-License-Identifier: AGPL-3.0-or-later
pragma solidity 0.7.5;
import "./IOwnableManagement.sol";

contract OwnableManagement is IOwnableManagement {
      address internal _owner;
    address internal _newOwner;

    event OwnershipPushed(address indexed previousOwner, address indexed newOwner);
    event OwnershipPulled(address indexed previousOwner, address indexed newOwner);

    constructor () {
        _owner = msg.sender;
        emit OwnershipPushed( address(0), _owner );
    }

    function manager() public view override returns (address) {
        return _owner;
    }

    modifier onlyManager() {
        require( _owner == msg.sender, "Ownable: caller is not the owner" );
        _;
    }

    function renounceManagement() public virtual override onlyManager() {
        emit OwnershipPushed( _owner, address(0) );
        _owner = address(0);
    }

    function pushManagement( address newOwner_ ) public virtual override onlyManager() {
        require( newOwner_ != address(0), "Ownable: new owner is the zero address");
        emit OwnershipPushed( _owner, newOwner_ );
        _newOwner = newOwner_;
    }
    
    function pullManagement() public virtual override {
        require( msg.sender == _newOwner, "Ownable: must be new owner to pull");
        emit OwnershipPulled( _owner, _newOwner );
        _owner = _newOwner;
    }
}

// SPDX-License-Identifier: AGPL-3.0-or-later
pragma solidity 0.7.5;

/**
 * @title ReentrancyGuard
 * @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.
 */
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, _status will be _NOT_ENTERED
        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: AGPL-3.0-or-later
pragma solidity 0.7.5;
import "./SafeMath.sol";
import "./Address.sol";
import "./IERC20.sol";

library SafeERC20 {
    using SafeMath for uint256;
    using Address for address;

    function safeTransfer(IERC20 token, address to, uint256 value) internal {
        callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
        callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

    function safeApprove(IERC20 token, address spender, uint256 value) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        // solhint-disable-next-line max-line-length
        require((value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
    }

    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 newAllowance = token.allowance(address(this), spender).add(value);
        callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
        callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function callOptionalReturn(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves.

        // A Solidity high level call has three parts:
        //  1. The target address is checked to verify it contains contract code
        //  2. The call itself is made, and success asserted
        //  3. The return value is decoded, which in turn checks the size of the returned data.
        // solhint-disable-next-line max-line-length
        require(address(token).isContract(), "SafeERC20: call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = address(token).call(data);
        require(success, "SafeERC20: low-level call failed");

        if (returndata.length > 0) { // Return data is optional
            // solhint-disable-next-line max-line-length
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}

// SPDX-License-Identifier: AGPL-3.0-or-later
pragma solidity 0.7.5;

library SafeMath {
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");

        return c;
    }

    function add32(uint32 a, uint32 b) internal pure returns (uint32) {
        uint32 c = a + b;
        require(c >= a, "SafeMath: addition overflow");

        return c;
    }

    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return sub(a, b, "SafeMath: subtraction overflow");
    }

    function sub(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        uint256 c = a - b;

        return c;
    }

    function sub32(uint32 a, uint32 b) internal pure returns (uint32) {
        return sub32(a, b, "SafeMath: subtraction overflow");
    }

    function sub32(
        uint32 a,
        uint32 b,
        string memory errorMessage
    ) internal pure returns (uint32) {
        require(b <= a, errorMessage);
        uint32 c = a - b;

        return c;
    }

    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        if (a == 0) {
            return 0;
        }

        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");

        return c;
    }

    function mul32(uint32 a, uint32 b) internal pure returns (uint32) {
        if (a == 0) {
            return 0;
        }

        uint32 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");

        return c;
    }

    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return div(a, b, "SafeMath: division by zero");
    }

    function div(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold

        return c;
    }

    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return mod(a, b, "SafeMath: modulo by zero");
    }

    function mod(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }

    function sqrrt(uint256 a) internal pure returns (uint c) {
        if (a > 3) {
            c = a;
            uint b = add(div(a, 2), 1);
            while (b < c) {
                c = b;
                b = div(add(div(a, b), b), 2);
            }
        } else if (a != 0) {
            c = 1;
        }
    }

    function percentageAmount(
        uint256 total_,
        uint8 percentage_
    ) internal pure returns (uint256 percentAmount_) {
        return div(mul(total_, percentage_), 1000);
    }

    function substractPercentage(
        uint256 total_,
        uint8 percentageToSub_
    ) internal pure returns (uint256 result_) {
        return sub(total_, div(mul(total_, percentageToSub_), 1000));
    }

    function percentageOfTotal(
        uint256 part_,
        uint256 total_
    ) internal pure returns (uint256 percent_) {
        return div(mul(part_, 100), total_);
    }

    function average(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b) / 2 can overflow, so we distribute
        return (a / 2) + (b / 2) + (((a % 2) + (b % 2)) / 2);
    }

    function quadraticPricing(
        uint256 payment_,
        uint256 multiplier_
    ) internal pure returns (uint256) {
        return sqrrt(mul(multiplier_, payment_));
    }

    function bondingCurve(
        uint256 supply_,
        uint256 multiplier_
    ) internal pure returns (uint256) {
        return mul(multiplier_, supply_);
    }
}

// SPDX-License-Identifier: AGPL-3.0-or-later
pragma solidity 0.7.5;
import "./Ownable.sol";

contract VaultOwned is Ownable {
    address internal _vault;

    function setVault(address vault_) external onlyOwner returns (bool) {
        _vault = vault_;

        return true;
    }

    function vault() public view returns (address) {
        return _vault;
    }

    modifier onlyVault() {
        require(_vault == msg.sender, "VaultOwned: caller is not the Vault");
        _;
    }
}

// SPDX-License-Identifier: AGPL-3.0-or-later
pragma solidity 0.7.5;

import "./lib/SafeMath.sol";
import "./lib/Address.sol";
import "./lib/SafeERC20.sol";
import "./lib/OwnableManagement.sol";
import "./lib/IERC20.sol";
import "./lib/IStSolis.sol";
import "./lib/IERC20Mintable.sol";
import "./lib/ReentrancyGuard.sol";

/**
 * @title SolisLuxFarm
 * @notice Contract for farming LUX rewards from stSolis
 * @dev Users can hold stSolis to earn LUX rewards
 */
contract SolisLuxFarm is OwnableManagement, ReentrancyGuard {
    using SafeMath for uint256;
    using SafeERC20 for IERC20;

    // Tokens
    address public immutable lux;
    address public immutable stSolis;
    address public immutable stakingHelper;
    address public presaleDistributor;
    // User data
    mapping(address => uint) public lastStSolisClaimTime; // Last time user claimed stSolis rewards
    
    // Configurable rewards (set by manager)
    uint public dailyStSolisHolderReward = 200000 * 10**9; // boosted to 200k LUX for stSolis holders for launch
    
    // Constants
    uint public constant BASIS_POINTS = 10000; // Added constant for basis points
    uint public constant ONE_DAY = 1 days; // One day in seconds
    
    // Events
    event ClaimLux(address indexed user, uint amount);
    event ClaimStSolisLux(address indexed user, uint amount);
    event DailyRewardChanged(uint newAmount);

    /**
     * @notice Constructor
     * @param _lux LUX token address
     * @param _stSolis stSolis token address
     * @param _stakingHelper StakingHelper contract address
     */
    constructor(
        address _lux,
        address _stSolis,
        address _stakingHelper
    ) {
        require(_lux != address(0), "Invalid LUX address");
        require(_stSolis != address(0), "Invalid stSolis address");
        require(_stakingHelper != address(0), "Invalid stakingHelper address");
        
        lux = _lux;
        stSolis = _stSolis;
        stakingHelper = _stakingHelper;
    }

    function setPresaleDistributor(address _presaleDistributor) external onlyManager {
        require(_presaleDistributor != address(0), "Invalid presaleDistributor address");
        presaleDistributor = _presaleDistributor;
    }

    /**
     * @notice Set the daily reward amount for stSolis holders
     * @param _amount New daily reward amount
     */
    function setDailyReward(uint _amount) external onlyManager {
        require(_amount > 0, "Reward must be greater than 0");
        dailyStSolisHolderReward = _amount;
        emit DailyRewardChanged(_amount);
    }
    
    /**
     * @notice Calculate rewards from stSolis holdings for a user based on time since last stSolis claim
     * @param _user Address of the user
     * @return uint stSolis rewards
     */
    function calculateStSolisRewards(address _user) public view returns (uint) {
        uint claimTime = lastStSolisClaimTime[_user];
        if (claimTime == 0) {
            return 0;
        }
        
        uint stSolisBalance = IERC20(stSolis).balanceOf(_user);
        if (stSolisBalance == 0) return 0;
        
        uint totalStSolis = IStSolis(stSolis).circulatingSupply();
        if (totalStSolis == 0) return 0;
        
        uint timeElapsed = block.timestamp.sub(claimTime);
        uint timeRatio = timeElapsed.mul(BASIS_POINTS).div(ONE_DAY);
        
        return stSolisBalance.mul(dailyStSolisHolderReward).mul(timeRatio)
               .div(totalStSolis).div(BASIS_POINTS);
    }
    
    /**
     * @notice Claim and withdraw LUX rewards from stSolis holdings
     * @dev Calculates stSolis rewards based on time since last stSolis claim, mints them to user
     * @return uint Amount of LUX claimed
     */
    function claimLux() external nonReentrant returns (uint) {
        require(IERC20(stSolis).balanceOf(msg.sender) > 0, "Must have stSolis balance");
        
        uint reward = calculateStSolisRewards(msg.sender);
        require(reward > 0, "No rewards to claim");
        
        // Update last stSolis claim time
        lastStSolisClaimTime[msg.sender] = block.timestamp;
        
        IERC20Mintable(lux).mint(msg.sender, reward);
        
        emit ClaimLux(msg.sender, reward);
        emit ClaimStSolisLux(msg.sender, reward);
        return reward;
    }
    
    /**
     * @notice Get the last time a user claimed stSolis rewards
     * @param _user Address of the user
     * @return uint Timestamp of last stSolis claim
     */
    function getLastClaimTime(address _user) external view returns (uint) {
        return lastStSolisClaimTime[_user];
    }

    /**
     * @notice Emergency function to recover tokens accidentally sent to the contract
     * @param _token Address of the token to recover
     * @param _amount Amount of tokens to recover
     */
    function recoverERC20(address _token, uint256 _amount) external onlyManager {
        IERC20(_token).safeTransfer(manager(), _amount);
    }

    /**
     * @notice Set initial stSolis claim time for a user
     * @dev Can only be called by the StakingHelper contract
     * @param _user Address of the user to set initial claim time for
     */
    function setInitialClaimTime(address _user) external {
        require(msg.sender == stakingHelper || msg.sender == presaleDistributor, "Only StakingHelper or PresaleDistributor can call");
        require(_user != address(0), "Invalid user address");
        
        lastStSolisClaimTime[_user] = block.timestamp;
    }
}

// SPDX-License-Identifier: AGPL-3.0-or-later
pragma abicoder v2;
pragma solidity 0.7.5;
import "./lib/EnumerableSet.sol";
import "./lib/IERC2612Permit.sol";
import "./lib/IERC20.sol";
import "./lib/ERC20Permit.sol";
import "./lib/VaultOwned.sol";
import "./lib/SafeMath.sol";
import "./lib/Ownable.sol";

contract SolisPresale is Ownable {
    using SafeMath for uint256;
    using EnumerableSet for EnumerableSet.AddressSet;

    // Presale token
    IERC20 public presaleToken;
    // Solis token
    IERC20 public solisToken;

    // Whitelist of addresses allowed to participate in presale
    EnumerableSet.AddressSet private _whitelist;
    // Set of participants who have contributed to the presale
    EnumerableSet.AddressSet private _participants;
    
    // Mapping to track contributions per address
    mapping(address => uint256) public contributions;
    // Mapping to track if an address has claimed their tokens
    mapping(address => bool) public hasClaimed;
    
    // Total amount of presale tokens received
    uint256 public totalPresaleAmount;
    // Total amount of Solis tokens to distribute
    uint256 public totalSolisAmount;
    
    // Presale state variables
    bool public presaleEnabled;
    bool public distributionEnabled;
    bool public refundsEnabled;
    
    // Reentrancy guard
    bool private _locked;
    modifier nonReentrant() {
        require(!_locked, "ReentrancyGuard: reentrant call");
        _locked = true;
        _;
        _locked = false;
    }
    
    // Minimum and maximum contribution limits per address
    uint256 public minContribution = 500 * 10**18;
    uint256 public maxContribution = 15000 * 10**18;

    // Hard cap for the presale
    uint256 public hardCap = 750000 * 10**18;
    
    // Events
    event WhitelistAdded(address indexed account);
    event WhitelistRemoved(address indexed account);
    event PresaleStateChanged(bool enabled);
    event DistributionStateChanged(bool enabled);
    event RefundsStateChanged(bool enabled);
    event PresaleContribution(address indexed participant, uint256 amount);
    event SolisDeposited(uint256 amount);
    event TokensClaimed(address indexed participant, uint256 amount);
    event Refunded(address indexed participant, uint256 amount);

    constructor(address _presaleToken) {
        presaleToken = IERC20(_presaleToken);
    }
    
    /**
     * @dev Add an address to the whitelist
     * @param _account Address to add to the whitelist
     */
    function addToWhitelist(address _account) external onlyOwner {
        require(_account != address(0), "Cannot add zero address");
        require(_whitelist.add(_account), "Address already whitelisted");
        emit WhitelistAdded(_account);
    }
    
    /**
     * @dev Add multiple addresses to the whitelist
     * @param _accounts Array of addresses to add to the whitelist
     */
    function addMultipleToWhitelist(address[] calldata _accounts) external onlyOwner {
        for (uint256 i = 0; i < _accounts.length; i++) {
            if (_accounts[i] != address(0) && _whitelist.add(_accounts[i])) {
                emit WhitelistAdded(_accounts[i]);
            }
        }
    }
    
    /**
     * @dev Remove an address from the whitelist
     * @param _account Address to remove from the whitelist
     */
    function removeFromWhitelist(address _account) external onlyOwner {
        require(_whitelist.remove(_account), "Address not whitelisted");
        emit WhitelistRemoved(_account);
    }
    
    /**
     * @dev Check if an address is whitelisted
     * @param _account Address to check
     * @return bool True if address is whitelisted
     */
    function isWhitelisted(address _account) external view returns (bool) {
        return _whitelist.contains(_account);
    }
    
    /**
     * @dev Enable or disable the presale
     * @param _enabled New state for presale
     */
    function setPresaleEnabled(bool _enabled) external onlyOwner {
        presaleEnabled = _enabled;
        emit PresaleStateChanged(_enabled);
    }
    
    /**
     * @dev Enable or disable the distribution
     * @param _enabled New state for distribution
     */
    function setDistributionEnabled(bool _enabled) external onlyOwner {
        distributionEnabled = _enabled;
        emit DistributionStateChanged(_enabled);
    }
    
    /**
     * @dev Enable or disable refunds
     */
    function setRefundsEnabled(bool _enabled) external onlyOwner {
        refundsEnabled = _enabled;
        emit RefundsStateChanged(_enabled);
    }
    
    /**
     * @dev Participate in the presale by sending presale tokens
     * @param _amount Amount of presale tokens to contribute
     */
    function participate(uint256 _amount) external nonReentrant {
        require(presaleEnabled, "Presale is not enabled");
        require(_whitelist.contains(msg.sender), "Address not whitelisted");
        require(_amount > 0, "Amount must be greater than 0");
        require(_amount >= minContribution, "Below minimum contribution");
        require(contributions[msg.sender].add(_amount) <= maxContribution, "Exceeds maximum contribution");
        require(totalPresaleAmount.add(_amount) <= hardCap, "Hard cap reached");
        
        // Transfer presale tokens from participant to this contract
        require(
            presaleToken.transferFrom(msg.sender, address(this), _amount),
            "Token transfer failed"
        );
        
        // Add participant to the participants set if not already added
        if (!_participants.contains(msg.sender)) {
            _participants.add(msg.sender);
        }
        
        // Update contribution amount
        contributions[msg.sender] = contributions[msg.sender].add(_amount);
        
        // Update total presale amount
        totalPresaleAmount = totalPresaleAmount.add(_amount);
        
        emit PresaleContribution(msg.sender, _amount);
    }
    
    /**
     * @dev Set the Solis token address and deposit Solis tokens for distribution
     * @param _solisToken Address of the Solis token
     * @param _amount Amount of Solis tokens to deposit
     */
    function depositSolisTokens(address _solisToken, uint256 _amount) external onlyOwner {
        require(_solisToken != address(0), "Invalid Solis token address");
        require(_amount > 0, "Amount must be greater than 0");
        require(!presaleEnabled, "Presale must be disabled");
        
        // Set Solis token address if not already set
        if (address(solisToken) == address(0)) {
            solisToken = IERC20(_solisToken);
        } else {
            require(address(solisToken) == _solisToken, "Solis token address mismatch");
        }
        
        // Transfer Solis tokens from owner to this contract
        require(
            solisToken.transferFrom(msg.sender, address(this), _amount),
            "Token transfer failed"
        );
        
        // Update total Solis amount
        totalSolisAmount = totalSolisAmount.add(_amount);
        
        emit SolisDeposited(_amount);
    }
    
    /**
     * @dev Claim Solis tokens based on contribution
     */
    function claimTokens() external nonReentrant {
        require(distributionEnabled, "Distribution is not enabled");
        require(_participants.contains(msg.sender), "Not a participant");
        require(!hasClaimed[msg.sender], "Already claimed");
        require(totalPresaleAmount > 0, "No presale contributions");
        require(totalSolisAmount > 0, "No Solis tokens to distribute");
        
        // Calculate claimable amount
        uint256 claimableAmount = calculateClaimableAmount(msg.sender);
        require(claimableAmount > 0, "Nothing to claim");
        
        // Mark as claimed
        hasClaimed[msg.sender] = true;
        
        // Transfer Solis tokens to participant
        require(
            solisToken.transfer(msg.sender, claimableAmount),
            "Token transfer failed"
        );
        
        emit TokensClaimed(msg.sender, claimableAmount);
    }
    
    /**
     * @dev Calculate claimable Solis tokens for a participant
     * @param _participant Address of the participant
     * @return uint256 Amount of Solis tokens claimable
     */
    function calculateClaimableAmount(address _participant) public view returns (uint256) {
        if (totalPresaleAmount == 0 || totalSolisAmount == 0) {
            return 0;
        }
        
        // Calculate based on the formula: contribution * totalSolisTokens / totalPresale
        return contributions[_participant].mul(totalSolisAmount).div(totalPresaleAmount);
    }
    
    /**
     * @dev Get the number of whitelisted addresses
     * @return uint256 Number of whitelisted addresses
     */
    function getWhitelistCount() external view returns (uint256) {
        return _whitelist.length();
    }
    
    /**
     * @dev Get the number of participants
     * @return uint256 Number of participants
     */
    function getParticipantCount() external view returns (uint256) {
        return _participants.length();
    }
    
    /**
     * @dev Get participant at index
     * @param _index Index of the participant
     * @return address Participant address
     */
    function getParticipantAtIndex(uint256 _index) external view returns (address) {
        require(_index < _participants.length(), "Index out of bounds");
        return _participants.at(_index);
    }
    
    /**
     * @dev Emergency withdraw function for owner to recover tokens
     * @param _token Address of the token to withdraw
     */
    function emergencyWithdraw(address _token) external onlyOwner {
        IERC20 token = IERC20(_token);
        uint256 balance = token.balanceOf(address(this));
        require(balance > 0, "No tokens to withdraw");
        require(token.transfer(owner(), balance), "Transfer failed");
    }
    
    /**
     * @dev Refund function for participants
     */
    function refund() external nonReentrant {
        require(refundsEnabled, "Refunds not enabled");
        require(_participants.contains(msg.sender), "Not a participant");
        require(contributions[msg.sender] > 0, "No contribution to refund");
        
        uint256 amount = contributions[msg.sender];
        contributions[msg.sender] = 0;
        
        _participants.remove(msg.sender);
        
        // Update total presale amount
        totalPresaleAmount = totalPresaleAmount.sub(amount);
        
        // Transfer tokens back to participant
        require(
            presaleToken.transfer(msg.sender, amount),
            "Refund transfer failed"
        );
        
        emit Refunded(msg.sender, amount);
    }

    function setContributionLimits(uint256 _min, uint256 _max) external onlyOwner {
        require(_min <= _max, "Min must be <= max");
        minContribution = _min;
        maxContribution = _max;
    }

    function setHardCap(uint256 _hardCap) external onlyOwner {
        hardCap = _hardCap;
    }
}

{
  "optimizer": {
    "enabled": true,
    "runs": 1000
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

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0000000000000000000000007b6073a4471fd32c3875f11cc1bd0257e9e083ac00000000000000000000000042ed764ec17ff0bc4a0d0e6c09d1d6444233effd000000000000000000000000246dd366204fc15fd0f9e0fa23c336245414d2c1000000000000000000000000f5c55975a5c13a8fc9b78c82815ab3757ee019bf

-----Decoded View---------------
Arg [0] : _presaleContract (address): 0x7B6073a4471FD32C3875F11cc1Bd0257e9E083Ac
Arg [1] : _solisToken (address): 0x42ED764Ec17FF0bc4a0d0E6c09D1d6444233EfFD
Arg [2] : _stSolisToken (address): 0x246dD366204Fc15fD0f9e0fa23c336245414d2c1
Arg [3] : _luxFarmContract (address): 0xf5c55975A5c13a8fC9b78C82815Ab3757ee019Bf

-----Encoded View---------------
4 Constructor Arguments found :
Arg [0] : 0000000000000000000000007b6073a4471fd32c3875f11cc1bd0257e9e083ac
Arg [1] : 00000000000000000000000042ed764ec17ff0bc4a0d0e6c09d1d6444233effd
Arg [2] : 000000000000000000000000246dd366204fc15fd0f9e0fa23c336245414d2c1
Arg [3] : 000000000000000000000000f5c55975a5c13a8fc9b78c82815ab3757ee019bf