// File: contracts/modules/claims/ClaimsReward.sol



// SPDX-License-Identifier: GPL-3.0-only

pragma solidity ^0.5.0;

import "@openzeppelin/contracts/math/SafeMath.sol";
import "../../abstract/LegacyMasterAware.sol";
import "../../interfaces/IClaims.sol";
import "../../interfaces/IClaimsData.sol";
import "../../interfaces/IClaimsReward.sol";
import "../../interfaces/IGovernance.sol";
import "../../interfaces/IMCR.sol";
import "../../interfaces/IMemberRoles.sol";
import "../../interfaces/INXMToken.sol";
import "../../interfaces/IPool.sol";
import "../../interfaces/IPooledStaking.sol";
import "../../interfaces/IQuotationData.sol";
import "../../interfaces/ITokenController.sol";
import "../../interfaces/ITokenData.sol";

//Claims Reward Contract contains the functions for calculating number of tokens
// that will get rewarded, unlocked or burned depending upon the status of claim.

contract ClaimsReward is IClaimsReward, LegacyMasterAware {
  using SafeMath for uint;

  INXMToken internal tk;
  ITokenController internal tc;
  ITokenData internal td;
  IQuotationData internal qd;
  IClaims internal c1;
  IClaimsData internal cd;
  IPool internal pool;
  IGovernance internal gv;
  IPooledStaking internal pooledStaking;
  IMemberRoles internal memberRoles;
  IMCR public mcr;

  // assigned in constructor
  address public DAI;

  // constants
  address public constant ETH = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;
  uint private constant DECIMAL1E18 = uint(10) ** 18;

  constructor (address masterAddress, address _daiAddress) public {
    changeMasterAddress(masterAddress);
    DAI = _daiAddress;
  }

  function changeDependentContractAddress() public onlyInternal {
    c1 = IClaims(ms.getLatestAddress("CL"));
    cd = IClaimsData(ms.getLatestAddress("CD"));
    tk = INXMToken(ms.tokenAddress());
    tc = ITokenController(ms.getLatestAddress("TC"));
    td = ITokenData(ms.getLatestAddress("TD"));
    qd = IQuotationData(ms.getLatestAddress("QD"));
    gv = IGovernance(ms.getLatestAddress("GV"));
    pooledStaking = IPooledStaking(ms.getLatestAddress("PS"));
    memberRoles = IMemberRoles(ms.getLatestAddress("MR"));
    pool = IPool(ms.getLatestAddress("P1"));
    mcr = IMCR(ms.getLatestAddress("MC"));
  }

  /**
   * @dev Claims are closable by anyone
   * @param _claimId id of claim to be closed.
   */
  function closeClaim(uint _claimId) external {

    (, , , uint status, uint dateUpd,) = cd.getClaim(_claimId);
    bool canRetryPayout = status != 12 || dateUpd.add(cd.payoutRetryTime()) < block.timestamp;
    require(canRetryPayout, "ClaimsReward: Payout retry time not reached.");

    _changeClaimStatus(_claimId);
  }

  function changeClaimStatus(uint claimId) public checkPause onlyInternal {
    _changeClaimStatus(claimId);
  }

  /// @dev Decides the next course of action for a given claim.
  function _changeClaimStatus(uint claimId) internal {

    (, uint coverid) = cd.getClaimCoverId(claimId);
    (, uint status) = cd.getClaimStatusNumber(claimId);

    // when current status is "Pending-Claim Assessor Vote"
    if (status == 0) {
      _changeClaimStatusCA(claimId, coverid, status);
    } else if (status >= 1 && status <= 5) {
      _changeClaimStatusMV(claimId, coverid, status);
    } else if (status == 12) {// when current status is "Claim Accepted Payout Pending"

      bool payoutSucceeded = attemptClaimPayout(coverid);

      if (payoutSucceeded) {
        c1.setClaimStatus(claimId, 14);
      } else {
        c1.setClaimStatus(claimId, 12);
      }
    }
  }

  function getCurrencyAssetAddress(bytes4 currency) public view returns (address) {

    if (currency == "ETH") {
      return ETH;
    }

    if (currency == "DAI") {
      return DAI;
    }

    revert("ClaimsReward: unknown asset");
  }

  function attemptClaimPayout(uint coverId) internal returns (bool success) {

    uint sumAssured = qd.getCoverSumAssured(coverId);
    // TODO: when adding new cover currencies, fetch the correct decimals for this multiplication
    uint sumAssuredWei = sumAssured.mul(1e18);

    // get asset address
    bytes4 coverCurrency = qd.getCurrencyOfCover(coverId);
    address asset = getCurrencyAssetAddress(coverCurrency);

    // get payout address
    address payable coverHolder = qd.getCoverMemberAddress(coverId);
    address payable payoutAddress = memberRoles.getClaimPayoutAddress(coverHolder);

    // execute the payout
    bool payoutSucceeded = pool.sendClaimPayout(asset, payoutAddress, sumAssuredWei);

    if (payoutSucceeded) {

      // burn staked tokens
      (, address scAddress) = qd.getscAddressOfCover(coverId);
      uint tokenPrice = pool.getTokenPrice(asset);

      // note: for new assets "18" needs to be replaced with target asset decimals
      uint burnNXMAmount = sumAssuredWei.mul(1e18).div(tokenPrice);
      pooledStaking.pushBurn(scAddress, burnNXMAmount);

      // adjust total sum assured
      (, address coverContract) = qd.getscAddressOfCover(coverId);
      qd.subFromTotalSumAssured(coverCurrency, sumAssured);
      qd.subFromTotalSumAssuredSC(coverContract, coverCurrency, sumAssured);

      // update MCR since total sum assured and MCR% change
      mcr.updateMCRInternal(pool.getPoolValueInEth(), true);
      return true;
    }

    return false;
  }

  /// @dev Amount of tokens to be rewarded to a user for a particular vote id.
  /// @param check 1 -> CA vote, else member vote
  /// @param voteid vote id for which reward has to be Calculated
  /// @param flag if 1 calculate even if claimed,else don't calculate if already claimed
  /// @return tokenCalculated reward to be given for vote id
  /// @return lastClaimedCheck true if final verdict is still pending for that voteid
  /// @return tokens number of tokens locked under that voteid
  /// @return perc percentage of reward to be given.
  function getRewardToBeGiven(
    uint check,
    uint voteid,
    uint flag
  )
  public
  view
  returns (
    uint tokenCalculated,
    bool lastClaimedCheck,
    uint tokens,
    uint perc
  )

  {
    uint claimId;
    int8 verdict;
    bool claimed;
    uint tokensToBeDist;
    uint totalTokens;
    (tokens, claimId, verdict, claimed) = cd.getVoteDetails(voteid);
    lastClaimedCheck = false;
    int8 claimVerdict = cd.getFinalVerdict(claimId);
    if (claimVerdict == 0) {
      lastClaimedCheck = true;
    }

    if (claimVerdict == verdict && (claimed == false || flag == 1)) {

      if (check == 1) {
        (perc, , tokensToBeDist) = cd.getClaimRewardDetail(claimId);
      } else {
        (, perc, tokensToBeDist) = cd.getClaimRewardDetail(claimId);
      }

      if (perc > 0) {
        if (check == 1) {
          if (verdict == 1) {
            (, totalTokens,) = cd.getClaimsTokenCA(claimId);
          } else {
            (,, totalTokens) = cd.getClaimsTokenCA(claimId);
          }
        } else {
          if (verdict == 1) {
            (, totalTokens,) = cd.getClaimsTokenMV(claimId);
          } else {
            (,, totalTokens) = cd.getClaimsTokenMV(claimId);
          }
        }
        tokenCalculated = (perc.mul(tokens).mul(tokensToBeDist)).div(totalTokens.mul(100));


      }
    }
  }

  /// @dev Transfers all tokens held by contract to a new contract in case of upgrade.
  function upgrade(address _newAdd) public onlyInternal {
    uint amount = tk.balanceOf(address(this));
    if (amount > 0) {
      require(tk.transfer(_newAdd, amount));
    }

  }

  /// @dev Total reward in token due for claim by a user.
  /// @return total total number of tokens
  function getRewardToBeDistributedByUser(address _add) public view returns (uint total) {
    uint lengthVote = cd.getVoteAddressCALength(_add);
    uint lastIndexCA;
    uint lastIndexMV;
    uint tokenForVoteId;
    uint voteId;
    (lastIndexCA, lastIndexMV) = cd.getRewardDistributedIndex(_add);

    for (uint i = lastIndexCA; i < lengthVote; i++) {
      voteId = cd.getVoteAddressCA(_add, i);
      (tokenForVoteId,,,) = getRewardToBeGiven(1, voteId, 0);
      total = total.add(tokenForVoteId);
    }

    lengthVote = cd.getVoteAddressMemberLength(_add);

    for (uint j = lastIndexMV; j < lengthVote; j++) {
      voteId = cd.getVoteAddressMember(_add, j);
      (tokenForVoteId,,,) = getRewardToBeGiven(0, voteId, 0);
      total = total.add(tokenForVoteId);
    }
    return (total);
  }

  /// @dev Gets reward amount and claiming status for a given claim id.
  /// @return reward amount of tokens to user.
  /// @return claimed true if already claimed false if yet to be claimed.
  function getRewardAndClaimedStatus(uint check, uint claimId) public view returns (uint reward, bool claimed) {
    uint voteId;
    uint claimid;
    uint lengthVote;

    if (check == 1) {
      lengthVote = cd.getVoteAddressCALength(msg.sender);
      for (uint i = 0; i < lengthVote; i++) {
        voteId = cd.getVoteAddressCA(msg.sender, i);
        (, claimid, , claimed) = cd.getVoteDetails(voteId);
        if (claimid == claimId) {break;}
      }
    } else {
      lengthVote = cd.getVoteAddressMemberLength(msg.sender);
      for (uint j = 0; j < lengthVote; j++) {
        voteId = cd.getVoteAddressMember(msg.sender, j);
        (, claimid, , claimed) = cd.getVoteDetails(voteId);
        if (claimid == claimId) {break;}
      }
    }
    (reward,,,) = getRewardToBeGiven(check, voteId, 1);

  }

  /**
   * @dev Function used to claim all pending rewards : Claims Assessment + Risk Assessment + Governance
   * Claim assesment, Risk assesment, Governance rewards
   */
  function claimAllPendingReward(uint records) public isMemberAndcheckPause {
    _claimRewardToBeDistributed(records);
    pooledStaking.withdrawReward(msg.sender);
    uint governanceRewards = gv.claimReward(msg.sender, records);
    if (governanceRewards > 0) {
      require(tk.transfer(msg.sender, governanceRewards));
    }
  }

  /**
   * @dev Function used to get pending rewards of a particular user address.
   * @param _add user address.
   * @return total reward amount of the user
   */
  function getAllPendingRewardOfUser(address _add) public view returns (uint) {
    uint caReward = getRewardToBeDistributedByUser(_add);
    uint pooledStakingReward = pooledStaking.stakerReward(_add);
    uint governanceReward = gv.getPendingReward(_add);
    return caReward.add(pooledStakingReward).add(governanceReward);
  }

  /// @dev Rewards/Punishes users who  participated in Claims assessment.
  //    Unlocking and burning of the tokens will also depend upon the status of claim.
  /// @param claimid Claim Id.
  function _rewardAgainstClaim(uint claimid, uint coverid, uint status) internal {

    uint premiumNXM = qd.getCoverPremiumNXM(coverid);
    uint distributableTokens = premiumNXM.mul(cd.claimRewardPerc()).div(100); // 20% of premium

    uint percCA;
    uint percMV;

    (percCA, percMV) = cd.getRewardStatus(status);
    cd.setClaimRewardDetail(claimid, percCA, percMV, distributableTokens);

    if (percCA > 0 || percMV > 0) {
      tc.mint(address(this), distributableTokens);
    }

    // denied
    if (status == 6 || status == 9 || status == 11) {

      cd.changeFinalVerdict(claimid, -1);
      tc.markCoverClaimClosed(coverid, false);
      _burnCoverNoteDeposit(coverid);

    // accepted
    } else if (status == 7 || status == 8 || status == 10) {

      cd.changeFinalVerdict(claimid, 1);
      tc.markCoverClaimClosed(coverid, true);
      _unlockCoverNote(coverid);

      bool payoutSucceeded = attemptClaimPayout(coverid);

      // 12 = payout pending, 14 = payout succeeded
      uint nextStatus = payoutSucceeded ? 14 : 12;
      c1.setClaimStatus(claimid, nextStatus);
    }
  }

  function _burnCoverNoteDeposit(uint coverId) internal {

    address _of = qd.getCoverMemberAddress(coverId);
    bytes32 reason = keccak256(abi.encodePacked("CN", _of, coverId));
    uint lockedAmount = tc.tokensLocked(_of, reason);

    (uint amount,) = td.depositedCN(coverId);
    amount = amount.div(2);

    // limit burn amount to actual amount locked
    uint burnAmount = lockedAmount < amount ? lockedAmount : amount;

    if (burnAmount != 0) {
      tc.burnLockedTokens(_of, reason, amount);
    }
  }

  function unlockCoverNote(uint coverId) external onlyInternal {
    _unlockCoverNote(coverId);
  }

  function _unlockCoverNote(uint coverId) internal {

    address coverHolder = qd.getCoverMemberAddress(coverId);
    bytes32 reason = keccak256(abi.encodePacked("CN", coverHolder, coverId));
    uint lockedCN = tc.tokensLocked(coverHolder, reason);

    if (lockedCN != 0) {
      tc.releaseLockedTokens(coverHolder, reason, lockedCN);
    }
  }

  /// @dev Computes the result of Claim Assessors Voting for a given claim id.
  function _changeClaimStatusCA(uint claimid, uint coverid, uint status) internal {
    // Check if voting should be closed or not
    if (c1.checkVoteClosing(claimid) == 1) {
      uint caTokens = c1.getCATokens(claimid, 0); // converted in cover currency.
      uint accept;
      uint deny;
      uint acceptAndDeny;
      bool rewardOrPunish;
      uint sumAssured;
      (, accept) = cd.getClaimVote(claimid, 1);
      (, deny) = cd.getClaimVote(claimid, - 1);
      acceptAndDeny = accept.add(deny);
      accept = accept.mul(100);
      deny = deny.mul(100);

      if (caTokens == 0) {
        status = 3;
      } else {
        sumAssured = qd.getCoverSumAssured(coverid).mul(DECIMAL1E18);
        // Min threshold reached tokens used for voting > 5* sum assured
        if (caTokens > sumAssured.mul(5)) {

          if (accept.div(acceptAndDeny) > 70) {
            status = 7;
            qd.changeCoverStatusNo(coverid, uint8(IQuotationData.CoverStatus.ClaimAccepted));
            rewardOrPunish = true;
          } else if (deny.div(acceptAndDeny) > 70) {
            status = 6;
            qd.changeCoverStatusNo(coverid, uint8(IQuotationData.CoverStatus.ClaimDenied));
            rewardOrPunish = true;
          } else if (accept.div(acceptAndDeny) > deny.div(acceptAndDeny)) {
            status = 4;
          } else {
            status = 5;
          }

        } else {

          if (accept.div(acceptAndDeny) > deny.div(acceptAndDeny)) {
            status = 2;
          } else {
            status = 3;
          }
        }
      }

      c1.setClaimStatus(claimid, status);

      if (rewardOrPunish) {
        _rewardAgainstClaim(claimid, coverid, status);
      }
    }
  }

  /// @dev Computes the result of Member Voting for a given claim id.
  function _changeClaimStatusMV(uint claimid, uint coverid, uint status) internal {

    // Check if voting should be closed or not
    if (c1.checkVoteClosing(claimid) == 1) {
      uint8 coverStatus;
      uint statusOrig = status;
      uint mvTokens = c1.getCATokens(claimid, 1); // converted in cover currency.

      // If tokens used for acceptance >50%, claim is accepted
      uint sumAssured = qd.getCoverSumAssured(coverid).mul(DECIMAL1E18);
      uint thresholdUnreached = 0;
      // Minimum threshold for member voting is reached only when
      // value of tokens used for voting > 5* sum assured of claim id
      if (mvTokens < sumAssured.mul(5)) {
        thresholdUnreached = 1;
      }

      uint accept;
      (, accept) = cd.getClaimMVote(claimid, 1);
      uint deny;
      (, deny) = cd.getClaimMVote(claimid, - 1);

      if (accept.add(deny) > 0) {
        if (accept.mul(100).div(accept.add(deny)) >= 50 && statusOrig > 1 &&
        statusOrig <= 5 && thresholdUnreached == 0) {
          status = 8;
          coverStatus = uint8(IQuotationData.CoverStatus.ClaimAccepted);
        } else if (deny.mul(100).div(accept.add(deny)) >= 50 && statusOrig > 1 &&
        statusOrig <= 5 && thresholdUnreached == 0) {
          status = 9;
          coverStatus = uint8(IQuotationData.CoverStatus.ClaimDenied);
        }
      }

      if (thresholdUnreached == 1 && (statusOrig == 2 || statusOrig == 4)) {
        status = 10;
        coverStatus = uint8(IQuotationData.CoverStatus.ClaimAccepted);
      } else if (thresholdUnreached == 1 && (statusOrig == 5 || statusOrig == 3 || statusOrig == 1)) {
        status = 11;
        coverStatus = uint8(IQuotationData.CoverStatus.ClaimDenied);
      }

      c1.setClaimStatus(claimid, status);
      qd.changeCoverStatusNo(coverid, uint8(coverStatus));
      // Reward/Punish Claim Assessors and Members who participated in Claims assessment
      _rewardAgainstClaim(claimid, coverid, status);
    }
  }

  /// @dev Allows a user to claim all pending  Claims assessment rewards.
  function _claimRewardToBeDistributed(uint _records) internal {
    uint lengthVote = cd.getVoteAddressCALength(msg.sender);
    uint voteid;
    uint lastIndex;
    (lastIndex,) = cd.getRewardDistributedIndex(msg.sender);
    uint total = 0;
    uint tokenForVoteId = 0;
    bool lastClaimedCheck;
    bool claimed;
    uint counter = 0;
    uint claimId;
    uint perc;
    uint i;
    uint lastClaimed = lengthVote;

    for (i = lastIndex; i < lengthVote && counter < _records; i++) {
      voteid = cd.getVoteAddressCA(msg.sender, i);
      (tokenForVoteId, lastClaimedCheck, , perc) = getRewardToBeGiven(1, voteid, 0);
      if (lastClaimed == lengthVote && lastClaimedCheck == true) {
        lastClaimed = i;
      }
      (, claimId, , claimed) = cd.getVoteDetails(voteid);

      if (perc > 0 && !claimed) {
        counter++;
        cd.setRewardClaimed(voteid, true);
      } else if (perc == 0 && cd.getFinalVerdict(claimId) != 0 && !claimed) {
        (perc,,) = cd.getClaimRewardDetail(claimId);
        if (perc == 0) {
          counter++;
        }
        cd.setRewardClaimed(voteid, true);
      }
      if (tokenForVoteId > 0) {
        total = tokenForVoteId.add(total);
      }
    }
    if (lastClaimed == lengthVote) {
      cd.setRewardDistributedIndexCA(msg.sender, i);
    }
    else {
      cd.setRewardDistributedIndexCA(msg.sender, lastClaimed);
    }
    lengthVote = cd.getVoteAddressMemberLength(msg.sender);
    lastClaimed = lengthVote;

    {
      uint lockTimePerVote = td.lockCADays();
      uint reduction = lockTimePerVote.mul(counter);
      uint minExpiration = block.timestamp.add(lockTimePerVote);
      uint currentExpiration = tc.getLockedTokensValidity(msg.sender, "CLA");

      // reduce lock time only if current lock time is greater than min lock time
      if (currentExpiration > minExpiration) {

        // and never reduce to less than min lock time
        if (currentExpiration.sub(reduction) < minExpiration) {
          reduction = currentExpiration.sub(minExpiration);
        }

        tc.reduceLock(msg.sender, "CLA", reduction);
      }
    }

    (, lastIndex) = cd.getRewardDistributedIndex(msg.sender);
    lastClaimed = lengthVote;
    counter = 0;
    for (i = lastIndex; i < lengthVote && counter < _records; i++) {
      voteid = cd.getVoteAddressMember(msg.sender, i);
      (tokenForVoteId, lastClaimedCheck,,) = getRewardToBeGiven(0, voteid, 0);
      if (lastClaimed == lengthVote && lastClaimedCheck == true) {
        lastClaimed = i;
      }
      (, claimId, , claimed) = cd.getVoteDetails(voteid);
      if (claimed == false && cd.getFinalVerdict(claimId) != 0) {
        cd.setRewardClaimed(voteid, true);
        counter++;
      }
      if (tokenForVoteId > 0) {
        total = tokenForVoteId.add(total);
      }
    }
    if (total > 0) {
      require(tk.transfer(msg.sender, total));
    }
    if (lastClaimed == lengthVote) {
      cd.setRewardDistributedIndexMV(msg.sender, i);
    }
    else {
      cd.setRewardDistributedIndexMV(msg.sender, lastClaimed);
    }
  }
}

// File: @openzeppelin/contracts/math/SafeMath.sol



pragma solidity ^0.5.0;

/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeMath {
    /**
     * @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) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");

        return c;
    }

    /**
     * @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 sub(a, b, "SafeMath: subtraction overflow");
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     * - Subtraction cannot overflow.
     *
     * _Available since v2.4.0._
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        uint256 c = a - b;

        return c;
    }

    /**
     * @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) {
        // 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 0;
        }

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

        return c;
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts 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) internal pure returns (uint256) {
        return div(a, b, "SafeMath: division by zero");
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts 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.
     *
     * _Available since v2.4.0._
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        // Solidity only automatically asserts when dividing by 0
        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;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts 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 mod(a, b, "SafeMath: modulo by zero");
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts with custom message 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.
     *
     * _Available since v2.4.0._
     */
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }
}

// File: contracts/abstract/LegacyMasterAware.sol



// SPDX-License-Identifier: GPL-3.0-only

pragma solidity ^0.5.0;

import "../interfaces/INXMMaster.sol";

contract LegacyMasterAware {

  INXMMaster public ms;
  address public nxMasterAddress;

  modifier onlyInternal {
    require(ms.isInternal(msg.sender));
    _;
  }

  modifier isMemberAndcheckPause {
    require(ms.isPause() == false && ms.isMember(msg.sender) == true);
    _;
  }

  modifier onlyOwner {
    require(ms.isOwner(msg.sender));
    _;
  }

  modifier checkPause {
    require(ms.isPause() == false);
    _;
  }

  modifier isMember {
    require(ms.isMember(msg.sender), "Not member");
    _;
  }

  /**
   * @dev Iupgradable Interface to update dependent contract address
   */
  function changeDependentContractAddress() public;

  /**
   * @dev change master address
   * @param _masterAddress is the new address
   */
  function changeMasterAddress(address _masterAddress) public {
    if (address(ms) != address(0)) {
      require(address(ms) == msg.sender, "Not master");
    }

    ms = INXMMaster(_masterAddress);
    nxMasterAddress = _masterAddress;
  }

}

// File: contracts/interfaces/IClaims.sol



// SPDX-License-Identifier: GPL-3.0-only

pragma solidity >=0.5.0;

interface IClaims {

  function setClaimStatus(uint claimId, uint stat) external;

  function getCATokens(uint claimId, uint member) external view returns (uint tokens);

  function submitClaim(uint coverId) external;

  function submitClaimForMember(uint coverId, address member) external;

  function submitClaimAfterEPOff() external pure;

  function submitCAVote(uint claimId, int8 verdict) external;

  function submitMemberVote(uint claimId, int8 verdict) external;

  function pauseAllPendingClaimsVoting() external pure;

  function startAllPendingClaimsVoting() external pure;

  function checkVoteClosing(uint claimId) external view returns (int8 close);
}

// File: contracts/interfaces/IClaimsData.sol



// SPDX-License-Identifier: GPL-3.0-only

pragma solidity >=0.5.0;

interface IClaimsData {

  function pendingClaimStart() external view returns (uint);
  function claimDepositTime() external view returns (uint);
  function maxVotingTime() external view returns (uint);
  function minVotingTime() external view returns (uint);
  function payoutRetryTime() external view returns (uint);
  function claimRewardPerc() external view returns (uint);
  function minVoteThreshold() external view returns (uint);
  function maxVoteThreshold() external view returns (uint);
  function majorityConsensus() external view returns (uint);
  function pauseDaysCA() external view returns (uint);

  function userClaimVotePausedOn(address) external view returns (uint);

  function setpendingClaimStart(uint _start) external;

  function setRewardDistributedIndexCA(address _voter, uint caIndex) external;

  function setUserClaimVotePausedOn(address user) external;

  function setRewardDistributedIndexMV(address _voter, uint mvIndex) external;


  function setClaimRewardDetail(
    uint claimid,
    uint percCA,
    uint percMV,
    uint tokens
  ) external;

  function setRewardClaimed(uint _voteid, bool claimed) external;

  function changeFinalVerdict(uint _claimId, int8 _verdict) external;

  function addClaim(
    uint _claimId,
    uint _coverId,
    address _from,
    uint _nowtime
  ) external;

  function addVote(
    address _voter,
    uint _tokens,
    uint claimId,
    int8 _verdict
  ) external;

  function addClaimVoteCA(uint _claimId, uint _voteid) external;

  function setUserClaimVoteCA(
    address _from,
    uint _claimId,
    uint _voteid
  ) external;

  function setClaimTokensCA(uint _claimId, int8 _vote, uint _tokens) external;

  function setClaimTokensMV(uint _claimId, int8 _vote, uint _tokens) external;

  function addClaimVotemember(uint _claimId, uint _voteid) external;

  function setUserClaimVoteMember(
    address _from,
    uint _claimId,
    uint _voteid
  ) external;

  function updateState12Count(uint _claimId, uint _cnt) external;

  function setClaimStatus(uint _claimId, uint _stat) external;

  function setClaimdateUpd(uint _claimId, uint _dateUpd) external;

  function setClaimAtEmergencyPause(
    uint _coverId,
    uint _dateUpd,
    bool _submit
  ) external;

  function setClaimSubmittedAtEPTrue(uint _index, bool _submit) external;


  function setFirstClaimIndexToSubmitAfterEP(
    uint _firstClaimIndexToSubmit
  ) external;


  function setPendingClaimDetails(
    uint _claimId,
    uint _pendingTime,
    bool _voting
  ) external;

  function setPendingClaimVoteStatus(uint _claimId, bool _vote) external;

  function setFirstClaimIndexToStartVotingAfterEP(
    uint _claimStartVotingFirstIndex
  ) external;

  function callVoteEvent(
    address _userAddress,
    uint _claimId,
    bytes4 _typeOf,
    uint _tokens,
    uint _submitDate,
    int8 _verdict
  ) external;

  function callClaimEvent(
    uint _coverId,
    address _userAddress,
    uint _claimId,
    uint _datesubmit
  ) external;

  function getUintParameters(bytes8 code) external view returns (bytes8 codeVal, uint val);

  function getClaimOfEmergencyPauseByIndex(
    uint _index
  )
  external
  view
  returns (
    uint coverId,
    uint dateUpd,
    bool submit
  );

  function getAllClaimsByIndex(
    uint _claimId
  )
  external
  view
  returns (
    uint coverId,
    int8 vote,
    uint status,
    uint dateUpd,
    uint state12Count
  );

  function getUserClaimVoteCA(
    address _add,
    uint _claimId
  )
  external
  view
  returns (uint idVote);

  function getUserClaimVoteMember(
    address _add,
    uint _claimId
  )
  external
  view
  returns (uint idVote);

  function getAllVoteLength() external view returns (uint voteCount);

  function getClaimStatusNumber(uint _claimId) external view returns (uint claimId, uint statno);

  function getRewardStatus(uint statusNumber) external view returns (uint percCA, uint percMV);

  function getClaimState12Count(uint _claimId) external view returns (uint num);

  function getClaimDateUpd(uint _claimId) external view returns (uint dateupd);

  function getAllClaimsByAddress(address _member) external view returns (uint[] memory claimarr);


  function getClaimsTokenCA(
    uint _claimId
  )
  external
  view
  returns (
    uint claimId,
    uint accept,
    uint deny
  );

  function getClaimsTokenMV(
    uint _claimId
  )
  external
  view
  returns (
    uint claimId,
    uint accept,
    uint deny
  );
  function getCaClaimVotesToken(uint _claimId) external view returns (uint claimId, uint cnt);

  function getMemberClaimVotesToken(
    uint _claimId
  )
  external
  view
  returns (uint claimId, uint cnt);

  function getVoteDetails(uint _voteid)
  external view
  returns (
    uint tokens,
    uint claimId,
    int8 verdict,
    bool rewardClaimed
  );

  function getVoterVote(uint _voteid) external view returns (address voter);

  function getClaim(
    uint _claimId
  )
  external
  view
  returns (
    uint claimId,
    uint coverId,
    int8 vote,
    uint status,
    uint dateUpd,
    uint state12Count
  );

  function getClaimVoteLength(
    uint _claimId,
    uint8 _ca
  )
  external
  view
  returns (uint claimId, uint len);

  function getVoteVerdict(
    uint _claimId,
    uint _index,
    uint8 _ca
  )
  external
  view
  returns (int8 ver);

  function getVoteToken(
    uint _claimId,
    uint _index,
    uint8 _ca
  )
  external
  view
  returns (uint tok);

  function getVoteVoter(
    uint _claimId,
    uint _index,
    uint8 _ca
  )
  external
  view
  returns (address voter);

  function getUserClaimCount(address _add) external view returns (uint len);

  function getClaimLength() external view returns (uint len);

  function actualClaimLength() external view returns (uint len);


  function getClaimFromNewStart(
    uint _index,
    address _add
  )
  external
  view
  returns (
    uint coverid,
    uint claimId,
    int8 voteCA,
    int8 voteMV,
    uint statusnumber
  );

  function getUserClaimByIndex(
    uint _index,
    address _add
  )
  external
  view
  returns (
    uint status,
    uint coverid,
    uint claimId
  );

  function getAllVotesForClaim(
    uint _claimId
  )
  external
  view
  returns (
    uint claimId,
    uint[] memory ca,
    uint[] memory mv
  );


  function getTokensClaim(
    address _of,
    uint _claimId
  )
  external
  view
  returns (
    uint claimId,
    uint tokens
  );

  function getRewardDistributedIndex(
    address _voter
  )
  external
  view
  returns (
    uint lastCAvoteIndex,
    uint lastMVvoteIndex
  );

  function getClaimRewardDetail(
    uint claimid
  )
  external
  view
  returns (
    uint percCA,
    uint percMV,
    uint tokens
  );

  function getClaimCoverId(uint _claimId) external view returns (uint claimId, uint coverid);

  function getClaimVote(uint _claimId, int8 _verdict) external view returns (uint claimId, uint token);

  function getClaimMVote(uint _claimId, int8 _verdict) external view returns (uint claimId, uint token);

  function getVoteAddressCA(address _voter, uint index) external view returns (uint);

  function getVoteAddressMember(address _voter, uint index) external view returns (uint);

  function getVoteAddressCALength(address _voter) external view returns (uint);

  function getVoteAddressMemberLength(address _voter) external view returns (uint);

  function getFinalVerdict(uint _claimId) external view returns (int8 verdict);

  function getLengthOfClaimSubmittedAtEP() external view returns (uint len);

  function getFirstClaimIndexToSubmitAfterEP() external view returns (uint indexToSubmit);

  function getLengthOfClaimVotingPause() external view returns (uint len);

  function getPendingClaimDetailsByIndex(
    uint _index
  )
  external
  view
  returns (
    uint claimId,
    uint pendingTime,
    bool voting
  );

  function getFirstClaimIndexToStartVotingAfterEP() external view returns (uint firstindex);

}

// File: contracts/interfaces/IClaimsReward.sol



// SPDX-License-Identifier: GPL-3.0-only

pragma solidity >=0.5.0;

interface IClaimsReward {

  /// @dev Decides the next course of action for a given claim.
  function changeClaimStatus(uint claimid) external;

  function getCurrencyAssetAddress(bytes4 currency) external view returns (address);

  function getRewardToBeGiven(
    uint check,
    uint voteid,
    uint flag
  )
  external
  view
  returns (
    uint tokenCalculated,
    bool lastClaimedCheck,
    uint tokens,
    uint perc
  );

  function upgrade(address _newAdd) external;

  function getRewardToBeDistributedByUser(address _add) external view returns (uint total);

  function getRewardAndClaimedStatus(uint check, uint claimId) external view returns (uint reward, bool claimed);

  function claimAllPendingReward(uint records) external;

  function getAllPendingRewardOfUser(address _add) external view returns (uint);

  function unlockCoverNote(uint coverId) external;
}

// File: contracts/interfaces/IGovernance.sol



// SPDX-License-Identifier: GPL-3.0-only

pragma solidity >=0.5.0;

interface IGovernance {

  event Proposal(
    address indexed proposalOwner,
    uint256 indexed proposalId,
    uint256 dateAdd,
    string proposalTitle,
    string proposalSD,
    string proposalDescHash
  );

  event Solution(
    uint256 indexed proposalId,
    address indexed solutionOwner,
    uint256 indexed solutionId,
    string solutionDescHash,
    uint256 dateAdd
  );

  event Vote(
    address indexed from,
    uint256 indexed proposalId,
    uint256 indexed voteId,
    uint256 dateAdd,
    uint256 solutionChosen
  );

  event RewardClaimed(
    address indexed member,
    uint gbtReward
  );

  /// @dev VoteCast event is called whenever a vote is cast that can potentially close the proposal.
  event VoteCast (uint256 proposalId);

  /// @dev ProposalAccepted event is called when a proposal is accepted so that a server can listen that can
  ///      call any offchain actions
  event ProposalAccepted (uint256 proposalId);

  /// @dev CloseProposalOnTime event is called whenever a proposal is created or updated to close it on time.
  event CloseProposalOnTime (
    uint256 indexed proposalId,
    uint256 time
  );

  /// @dev ActionSuccess event is called whenever an onchain action is executed.
  event ActionSuccess (
    uint256 proposalId
  );

  struct DelegateVote {
    address follower;
    address leader;
    uint lastUpd;
  }

  /// @dev Creates a new proposal
  /// @param _proposalDescHash Proposal description hash through IPFS having Short and long description of proposal
  /// @param _categoryId This id tells under which the proposal is categorized i.e. Proposal's Objective
  function createProposal(
    string calldata _proposalTitle,
    string calldata _proposalSD,
    string calldata _proposalDescHash,
    uint _categoryId
  )
  external;

  /// @dev Edits the details of an existing proposal and creates new version
  /// @param _proposalId Proposal id that details needs to be updated
  /// @param _proposalDescHash Proposal description hash having long and short description of proposal.
  function updateProposal(
    uint _proposalId,
    string calldata _proposalTitle,
    string calldata _proposalSD,
    string calldata _proposalDescHash
  )
  external;

  /// @dev Categorizes proposal to proceed further. Categories shows the proposal objective.
  function categorizeProposal(
    uint _proposalId,
    uint _categoryId,
    uint _incentives
  )
  external;

  /// @dev Submit proposal with solution
  /// @param _proposalId Proposal id
  /// @param _solutionHash Solution hash contains  parameters, values and description needed according to proposal
  function submitProposalWithSolution(
    uint _proposalId,
    string calldata _solutionHash,
    bytes calldata _action
  )
  external;

  /// @dev Creates a new proposal with solution and votes for the solution
  /// @param _proposalDescHash Proposal description hash through IPFS having Short and long description of proposal
  /// @param _categoryId This id tells under which the proposal is categorized i.e. Proposal's Objective
  /// @param _solutionHash Solution hash contains  parameters, values and description needed according to proposal
  function createProposalwithSolution(
    string calldata _proposalTitle,
    string calldata _proposalSD,
    string calldata _proposalDescHash,
    uint _categoryId,
    string calldata _solutionHash,
    bytes calldata _action
  )
  external;

  /// @dev Casts vote
  /// @param _proposalId Proposal id
  /// @param _solutionChosen solution chosen while voting. _solutionChosen[0] is the chosen solution
  function submitVote(uint _proposalId, uint _solutionChosen) external;

  function closeProposal(uint _proposalId) external;

  function claimReward(address _memberAddress, uint _maxRecords) external returns (uint pendingDAppReward);

  function proposal(uint _proposalId)
  external
  view
  returns (
    uint proposalId,
    uint category,
    uint status,
    uint finalVerdict,
    uint totalReward
  );

  function canCloseProposal(uint _proposalId) external view returns (uint closeValue);

  function allowedToCatgorize() external view returns (uint roleId);

  function removeDelegation(address _add) external;

  function getPendingReward(address _memberAddress) external view returns (uint pendingDAppReward);

  function getFollowers(address _add) external view returns (uint[] memory);

  function followerDelegation(address _add) external view returns (uint delegationId);

  function allDelegation(uint _delegationId) external view returns (address follower, address leader, uint lastUpd);

}

// File: contracts/interfaces/IMCR.sol



// SPDX-License-Identifier: GPL-3.0-only

pragma solidity >=0.5.0;

interface IMCR {

  function updateMCRInternal(uint poolValueInEth, bool forceUpdate) external;
  function getMCR() external view returns (uint);


  function maxMCRFloorIncrement() external view returns (uint24);

  function mcrFloor() external view returns (uint112);
  function mcr() external view returns (uint112);
  function desiredMCR() external view returns (uint112);
  function lastUpdateTime() external view returns (uint32);
}

// File: contracts/interfaces/IMemberRoles.sol



// SPDX-License-Identifier: GPL-3.0-only

pragma solidity >=0.5.0;

interface IMemberRoles {

  enum Role {UnAssigned, AdvisoryBoard, Member, Owner}

  function payJoiningFee(address _userAddress) external payable;

  function switchMembership(address _newAddress) external;

  function switchMembershipOf(address member, address _newAddress) external;

  function swapOwner(address _newOwnerAddress) external;

  function kycVerdict(address payable _userAddress, bool verdict) external;

  function getClaimPayoutAddress(address payable _member) external view returns (address payable);

  function setClaimPayoutAddress(address payable _address) external;

  function totalRoles() external view returns (uint256);

  function changeAuthorized(uint _roleId, address _newAuthorized) external;

  function members(uint _memberRoleId) external view returns (uint, address[] memory memberArray);

  function numberOfMembers(uint _memberRoleId) external view returns (uint);

  function authorized(uint _memberRoleId) external view returns (address);

  function roles(address _memberAddress) external view returns (uint[] memory);

  function checkRole(address _memberAddress, uint _roleId) external view returns (bool);

  function getMemberLengthForAllRoles() external view returns (uint[] memory totalMembers);

  function memberAtIndex(uint _memberRoleId, uint index) external view returns (address, bool);

  function membersLength(uint _memberRoleId) external view returns (uint);
}

// File: contracts/interfaces/INXMToken.sol



// SPDX-License-Identifier: GPL-3.0-only

pragma solidity >=0.5.0;

interface INXMToken {

  function burn(uint256 amount) external returns (bool);

  function burnFrom(address from, uint256 value) external returns (bool);

  function operatorTransfer(address from, uint256 value) external returns (bool);

  function mint(address account, uint256 amount) external;

  function isLockedForMV(address member) external view returns (uint);

  function addToWhiteList(address _member) external returns (bool);

  function removeFromWhiteList(address _member) external returns (bool);

  function changeOperator(address _newOperator) external returns (bool);

  function lockForMemberVote(address _of, uint _days) external;

  /**
 * @dev Returns the amount of tokens in existence.
 */
  function totalSupply() external view returns (uint256);

  /**
   * @dev Returns the amount of tokens owned by `account`.
   */
  function balanceOf(address account) external view returns (uint256);

  /**
   * @dev Moves `amount` tokens from the caller's account to `recipient`.
   *
   * Returns a boolean value indicating whether the operation succeeded.
   *
   * Emits a {Transfer} event.
   */
  function transfer(address recipient, uint256 amount) external returns (bool);

  /**
   * @dev Returns the remaining number of tokens that `spender` will be
   * allowed to spend on behalf of `owner` through {transferFrom}. This is
   * zero by default.
   *
   * This value changes when {approve} or {transferFrom} are called.
   */
  function allowance(address owner, address spender) external view returns (uint256);

  /**
   * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
   *
   * Returns a boolean value indicating whether the operation succeeded.
   *
   * IMPORTANT: Beware that changing an allowance with this method brings the risk
   * that someone may use both the old and the new allowance by unfortunate
   * transaction ordering. One possible solution to mitigate this race
   * condition is to first reduce the spender's allowance to 0 and set the
   * desired value afterwards:
   * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
   *
   * Emits an {Approval} event.
   */
  function approve(address spender, uint256 amount) external returns (bool);

  /**
   * @dev Moves `amount` tokens from `sender` to `recipient` using the
   * allowance mechanism. `amount` is then deducted from the caller's
   * allowance.
   *
   * Returns a boolean value indicating whether the operation succeeded.
   *
   * Emits a {Transfer} event.
   */
  function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);

  /**
   * @dev Emitted when `value` tokens are moved from one account (`from`) to
   * another (`to`).
   *
   * Note that `value` may be zero.
   */
  event Transfer(address indexed from, address indexed to, uint256 value);

  /**
   * @dev Emitted when the allowance of a `spender` for an `owner` is set by
   * a call to {approve}. `value` is the new allowance.
   */
  event Approval(address indexed owner, address indexed spender, uint256 value);
}

// File: contracts/interfaces/IPool.sol



// SPDX-License-Identifier: GPL-3.0-only

pragma solidity >=0.5.0;

import "./IPriceFeedOracle.sol";

interface IPool {
  function sellNXM(uint tokenAmount, uint minEthOut) external;

  function sellNXMTokens(uint tokenAmount) external returns (bool);

  function minPoolEth() external returns (uint);

  function transferAssetToSwapOperator(address asset, uint amount) external;

  function setAssetDataLastSwapTime(address asset, uint32 lastSwapTime) external;

  function getAssetDetails(address _asset) external view returns (
    uint112 min,
    uint112 max,
    uint32 lastAssetSwapTime,
    uint maxSlippageRatio
  );

  function sendClaimPayout (
    address asset,
    address payable payoutAddress,
    uint amount
  ) external returns (bool success);

  function transferAsset(
    address asset,
    address payable destination,
    uint amount
  ) external;

  function upgradeCapitalPool(address payable newPoolAddress) external;

  function priceFeedOracle() external view returns (IPriceFeedOracle);

  function getPoolValueInEth() external view returns (uint);


  function transferAssetFrom(address asset, address from, uint amount) external;

  function getEthForNXM(uint nxmAmount) external view returns (uint ethAmount);

  function calculateEthForNXM(
    uint nxmAmount,
    uint currentTotalAssetValue,
    uint mcrEth
  ) external pure returns (uint);

  function calculateMCRRatio(uint totalAssetValue, uint mcrEth) external pure returns (uint);

  function calculateTokenSpotPrice(uint totalAssetValue, uint mcrEth) external pure returns (uint tokenPrice);

  function getTokenPrice(address asset) external view returns (uint tokenPrice);

  function getMCRRatio() external view returns (uint);
}

// File: contracts/interfaces/IPooledStaking.sol



// SPDX-License-Identifier: GPL-3.0-only

pragma solidity >=0.5.0;

interface IPooledStaking {

  function accumulateReward(address contractAddress, uint amount) external;

  function pushBurn(address contractAddress, uint amount) external;

  function hasPendingActions() external view returns (bool);

  function processPendingActions(uint maxIterations) external returns (bool finished);

  function contractStake(address contractAddress) external view returns (uint);

  function stakerReward(address staker) external view returns (uint);

  function stakerDeposit(address staker) external view returns (uint);

  function stakerContractStake(address staker, address contractAddress) external view returns (uint);

  function withdraw(uint amount) external;

  function stakerMaxWithdrawable(address stakerAddress) external view returns (uint);

  function withdrawReward(address stakerAddress) external;
}

// File: contracts/interfaces/IQuotationData.sol



// SPDX-License-Identifier: GPL-3.0-only

pragma solidity >=0.5.0;

interface IQuotationData {

  function authQuoteEngine() external view returns (address);
  function stlp() external view returns (uint);
  function stl() external view returns (uint);
  function pm() external view returns (uint);
  function minDays() external view returns (uint);
  function tokensRetained() external view returns (uint);
  function kycAuthAddress() external view returns (address);

  function refundEligible(address) external view returns (bool);
  function holdedCoverIDStatus(uint) external view returns (uint);
  function timestampRepeated(uint) external view returns (bool);

  enum HCIDStatus {NA, kycPending, kycPass, kycFailedOrRefunded, kycPassNoCover}
  enum CoverStatus {Active, ClaimAccepted, ClaimDenied, CoverExpired, ClaimSubmitted, Requested}

  function addInTotalSumAssuredSC(address _add, bytes4 _curr, uint _amount) external;

  function subFromTotalSumAssuredSC(address _add, bytes4 _curr, uint _amount) external;

  function subFromTotalSumAssured(bytes4 _curr, uint _amount) external;

  function addInTotalSumAssured(bytes4 _curr, uint _amount) external;

  function setTimestampRepeated(uint _timestamp) external;

  /// @dev Creates a blank new cover.
  function addCover(
    uint16 _coverPeriod,
    uint _sumAssured,
    address payable _userAddress,
    bytes4 _currencyCode,
    address _scAddress,
    uint premium,
    uint premiumNXM
  ) external;


  function addHoldCover(
    address payable from,
    address scAddress,
    bytes4 coverCurr,
    uint[] calldata coverDetails,
    uint16 coverPeriod
  ) external;

  function setRefundEligible(address _add, bool status) external;

  function setHoldedCoverIDStatus(uint holdedCoverID, uint status) external;

  function setKycAuthAddress(address _add) external;

  function changeAuthQuoteEngine(address _add) external;

  function getUintParameters(bytes8 code) external view returns (bytes8 codeVal, uint val);

  function getProductDetails()
  external
  view
  returns (
    uint _minDays,
    uint _pm,
    uint _stl,
    uint _stlp
  );

  function getCoverLength() external view returns (uint len);

  function getAuthQuoteEngine() external view returns (address _add);

  function getTotalSumAssured(bytes4 _curr) external view returns (uint amount);

  function getAllCoversOfUser(address _add) external view returns (uint[] memory allCover);

  function getUserCoverLength(address _add) external view returns (uint len);

  function getCoverStatusNo(uint _cid) external view returns (uint8);

  function getCoverPeriod(uint _cid) external view returns (uint32 cp);

  function getCoverSumAssured(uint _cid) external view returns (uint sa);

  function getCurrencyOfCover(uint _cid) external view returns (bytes4 curr);

  function getValidityOfCover(uint _cid) external view returns (uint date);

  function getscAddressOfCover(uint _cid) external view returns (uint, address);

  function getCoverMemberAddress(uint _cid) external view returns (address payable _add);

  function getCoverPremiumNXM(uint _cid) external view returns (uint _premiumNXM);

  function getCoverDetailsByCoverID1(
    uint _cid
  )
  external
  view
  returns (
    uint cid,
    address _memberAddress,
    address _scAddress,
    bytes4 _currencyCode,
    uint _sumAssured,
    uint premiumNXM
  );

  function getCoverDetailsByCoverID2(
    uint _cid
  )
  external
  view
  returns (
    uint cid,
    uint8 status,
    uint sumAssured,
    uint16 coverPeriod,
    uint validUntil
  );

  function getHoldedCoverDetailsByID1(
    uint _hcid
  )
  external
  view
  returns (
    uint hcid,
    address scAddress,
    bytes4 coverCurr,
    uint16 coverPeriod
  );

  function getUserHoldedCoverLength(address _add) external view returns (uint);

  function getUserHoldedCoverByIndex(address _add, uint index) external view returns (uint);

  function getHoldedCoverDetailsByID2(
    uint _hcid
  )
  external
  view
  returns (
    uint hcid,
    address payable memberAddress,
    uint[] memory coverDetails
  );

  function getTotalSumAssuredSC(address _add, bytes4 _curr) external view returns (uint amount);

  function changeCoverStatusNo(uint _cid, uint8 _stat) external;

}

// File: contracts/interfaces/ITokenController.sol



// SPDX-License-Identifier: GPL-3.0-only

pragma solidity >=0.5.0;

interface ITokenController {

  function coverInfo(uint id) external view returns (uint16 claimCount, bool hasOpenClaim, bool hasAcceptedClaim);

  function claimSubmissionGracePeriod() external view returns (uint);

  function withdrawCoverNote(
    address _of,
    uint[] calldata _coverIds,
    uint[] calldata _indexes
  ) external;

  function markCoverClaimOpen(uint coverId) external;

  function markCoverClaimClosed(uint coverId, bool isAccepted) external;

  function changeOperator(address _newOperator) external;

  function operatorTransfer(address _from, address _to, uint _value) external returns (bool);

  function lockClaimAssessmentTokens(uint256 _amount, uint256 _time) external;

  function lockOf(address _of, bytes32 _reason, uint256 _amount, uint256 _time) external returns (bool);

  function mintCoverNote(
    address _of,
    bytes32 _reason,
    uint256 _amount,
    uint256 _time
  ) external;

  function extendClaimAssessmentLock(uint256 _time) external;

  function extendLockOf(address _of, bytes32 _reason, uint256 _time) external returns (bool);

  function increaseClaimAssessmentLock(uint256 _amount) external;

  function burnFrom(address _of, uint amount) external returns (bool);

  function burnLockedTokens(address _of, bytes32 _reason, uint256 _amount) external;

  function reduceLock(address _of, bytes32 _reason, uint256 _time) external;

  function releaseLockedTokens(address _of, bytes32 _reason, uint256 _amount) external;

  function addToWhitelist(address _member) external;

  function removeFromWhitelist(address _member) external;

  function mint(address _member, uint _amount) external;

  function lockForMemberVote(address _of, uint _days) external;
  function withdrawClaimAssessmentTokens(address _of) external;

  function getLockReasons(address _of) external view returns (bytes32[] memory reasons);

  function getLockedTokensValidity(address _of, bytes32 reason) external view returns (uint256 validity);

  function getUnlockableTokens(address _of) external view returns (uint256 unlockableTokens);

  function tokensLocked(address _of, bytes32 _reason) external view returns (uint256 amount);

  function tokensLockedWithValidity(address _of, bytes32 _reason)
  external
  view
  returns (uint256 amount, uint256 validity);

  function tokensUnlockable(address _of, bytes32 _reason) external view returns (uint256 amount);

  function totalSupply() external view returns (uint256);

  function tokensLockedAtTime(address _of, bytes32 _reason, uint256 _time) external view returns (uint256 amount);
  function totalBalanceOf(address _of) external view returns (uint256 amount);

  function totalLockedBalance(address _of) external view returns (uint256 amount);
}

// File: contracts/interfaces/ITokenData.sol



// SPDX-License-Identifier: GPL-3.0-only

pragma solidity >=0.5.0;

interface ITokenData {

  function walletAddress() external view returns (address payable);
  function lockTokenTimeAfterCoverExp() external view returns (uint);
  function bookTime() external view returns (uint);
  function lockCADays() external view returns (uint);
  function lockMVDays() external view returns (uint);
  function scValidDays() external view returns (uint);
  function joiningFee() external view returns (uint);
  function stakerCommissionPer() external view returns (uint);
  function stakerMaxCommissionPer() external view returns (uint);
  function tokenExponent() external view returns (uint);
  function priceStep() external view returns (uint);

  function depositedCN(uint) external view returns (uint amount, bool isDeposited);

  function lastCompletedStakeCommission(address) external view returns (uint);

  function changeWalletAddress(address payable _address) external;

  function getStakerStakedContractByIndex(
    address _stakerAddress,
    uint _stakerIndex
  )
  external
  view
  returns (address stakedContractAddress);

  function getStakerStakedBurnedByIndex(
    address _stakerAddress,
    uint _stakerIndex
  )
  external
  view
  returns (uint burnedAmount);

  function getStakerStakedUnlockableBeforeLastBurnByIndex(
    address _stakerAddress,
    uint _stakerIndex
  )
  external
  view
  returns (uint unlockable);

  function getStakerStakedContractIndex(
    address _stakerAddress,
    uint _stakerIndex
  )
  external
  view
  returns (uint scIndex);

  function getStakedContractStakerIndex(
    address _stakedContractAddress,
    uint _stakedContractIndex
  )
  external
  view
  returns (uint sIndex);

  function getStakerInitialStakedAmountOnContract(
    address _stakerAddress,
    uint _stakerIndex
  )
  external
  view
  returns (uint amount);

  function getStakerStakedContractLength(
    address _stakerAddress
  )
  external
  view
  returns (uint length);

  function getStakerUnlockedStakedTokens(
    address _stakerAddress,
    uint _stakerIndex
  )
  external
  view
  returns (uint amount);

  function pushUnlockedStakedTokens(
    address _stakerAddress,
    uint _stakerIndex,
    uint _amount
  ) external;


  function pushBurnedTokens(
    address _stakerAddress,
    uint _stakerIndex,
    uint _amount
  ) external;

  function pushUnlockableBeforeLastBurnTokens(
    address _stakerAddress,
    uint _stakerIndex,
    uint _amount
  ) external;

  function setUnlockableBeforeLastBurnTokens(
    address _stakerAddress,
    uint _stakerIndex,
    uint _amount
  ) external;

  function pushEarnedStakeCommissions(
    address _stakerAddress,
    address _stakedContractAddress,
    uint _stakedContractIndex,
    uint _commissionAmount
  ) external;

  function pushRedeemedStakeCommissions(
    address _stakerAddress,
    uint _stakerIndex,
    uint _amount
  ) external;

  function getStakerEarnedStakeCommission(
    address _stakerAddress,
    uint _stakerIndex
  )
  external
  view
  returns (uint);

  function getStakerRedeemedStakeCommission(
    address _stakerAddress,
    uint _stakerIndex
  )
  external
  view
  returns (uint);

  function getStakerTotalEarnedStakeCommission(
    address _stakerAddress
  )
  external
  view
  returns (uint totalCommissionEarned);

  function getStakerTotalReedmedStakeCommission(
    address _stakerAddress
  )
  external
  view
  returns (uint totalCommissionRedeemed);

  function setDepositCN(uint coverId, bool flag) external;

  function getStakedContractStakerByIndex(
    address _stakedContractAddress,
    uint _stakedContractIndex
  )
  external
  view
  returns (address stakerAddress);

  function getStakedContractStakersLength(
    address _stakedContractAddress
  ) external view returns (uint length);

  function addStake(
    address _stakerAddress,
    address _stakedContractAddress,
    uint _amount
  ) external returns (uint scIndex);

  function bookCATokens(address _of) external;

  function isCATokensBooked(address _of) external view returns (bool res);

  function setStakedContractCurrentCommissionIndex(
    address _stakedContractAddress,
    uint _index
  ) external;

  function setLastCompletedStakeCommissionIndex(
    address _stakerAddress,
    uint _index
  ) external;


  function setStakedContractCurrentBurnIndex(
    address _stakedContractAddress,
    uint _index
  ) external;

  function setDepositCNAmount(uint coverId, uint amount) external;
}

// File: contracts/interfaces/INXMMaster.sol



// SPDX-License-Identifier: GPL-3.0-only

pragma solidity >=0.5.0;

interface INXMMaster {

  function tokenAddress() external view returns (address);

  function owner() external view returns (address);

  function masterInitialized() external view returns (bool);

  function isInternal(address _add) external view returns (bool);

  function isPause() external view returns (bool check);

  function isOwner(address _add) external view returns (bool);

  function isMember(address _add) external view returns (bool);

  function checkIsAuthToGoverned(address _add) external view returns (bool);

  function dAppLocker() external view returns (address _add);

  function getLatestAddress(bytes2 _contractName) external view returns (address payable contractAddress);

  function upgradeMultipleContracts(
    bytes2[] calldata _contractCodes,
    address payable[] calldata newAddresses
  ) external;

  function removeContracts(bytes2[] calldata contractCodesToRemove) external;

  function addNewInternalContracts(
    bytes2[] calldata _contractCodes,
    address payable[] calldata newAddresses,
    uint[] calldata _types
  ) external;

  function updateOwnerParameters(bytes8 code, address payable val) external;
}

// File: contracts/interfaces/IPriceFeedOracle.sol



// SPDX-License-Identifier: GPL-3.0-only

pragma solidity >=0.5.0;

interface IPriceFeedOracle {

  function daiAddress() external view returns (address);
  function ETH() external view returns (address);

  function getAssetToEthRate(address asset) external view returns (uint);
  function getAssetForEth(address asset, uint ethIn) external view returns (uint);

}