    function _handleOpenFees(
        uint _asset,
        uint _positionSize,
        address _trader,
        address _tigAsset,
        bool _isBot
    )
        internal
        returns (uint _feePaid)
    {
        ...
        unchecked {
            uint _daoFeesPaid = _positionSize * _fees.daoFees / DIVISION_CONSTANT;
            ...
            IStable(_tigAsset).mintFor(address(this), _daoFeesPaid);
        }
        gov.distribute(_tigAsset, IStable(_tigAsset).balanceOf(address(this)));
    }
    function _handleCloseFees(
        uint _asset,
        uint _payout,
        address _tigAsset,
        uint _positionSize,
        address _trader,
        bool _isBot
    )
        internal
        returns (uint payout_)
    {
        ...
        IStable(_tigAsset).mintFor(address(this), _daoFeesPaid);
        IStable(_tigAsset).approve(address(gov), type(uint).max);
        gov.distribute(_tigAsset, _daoFeesPaid);
        return payout_;
    }
    function distribute(address _tigAsset, uint _amount) external {
        if (assets.length == 0 || assets[assetsIndex[_tigAsset]] == address(0) || totalSupply() == 0 || !_allowedAsset[_tigAsset]) return;
        try IERC20(_tigAsset).transferFrom(_msgSender(), address(this), _amount) {
            accRewardsPerNFT[_tigAsset] += _amount/totalSupply();
        } catch {
            return;
        }
    }
    it.only("Governance NFT holder, whose NFT was minted before initiateMarketOrder function is called, can lose deserved rewards after initiateMarketOrder function is called", async function () {
      let TradeInfo = [parseEther("1000"), MockDAI.address, StableVault.address, parseEther("10"), 0, true, parseEther("30000"), parseEther("10000"), ethers.constants.HashZero];
      let PriceData = [node.address, 0, parseEther("20000"), 0, 2000000000, false];
      let message = ethers.utils.keccak256(
        ethers.utils.defaultAbiCoder.encode(
          ['address', 'uint256', 'uint256', 'uint256', 'uint256', 'bool'],
          [node.address, 0, parseEther("20000"), 0, 2000000000, false]
        )
      );
      let sig = await node.signMessage(
        Buffer.from(message.substring(2), 'hex')
      );
      
      let PermitData = [permitSig.deadline, ethers.constants.MaxUint256, permitSig.v, permitSig.r, permitSig.s, true];

      // one Governance NFT is minted to owner before initiateMarketOrder function is called
      const GovNFT = await deployments.get("GovNFT");
      const govnft = await ethers.getContractAt("GovNFT", GovNFT.address);
      await govnft.connect(owner).mint();

      // calling initiateMarketOrder function attempts to send 10000000000000000000 tigAsset as DAO fees to GovNFT contract
      await expect(trading.connect(owner).initiateMarketOrder(TradeInfo, PriceData, sig, PermitData, owner.address))
        .to.emit(trading, 'FeesDistributed')
        .withArgs(stabletoken.address, "10000000000000000000", "0", "0", "0", ethers.constants.AddressZero);

      // another Governance NFT is minted to owner and then transferred to user after initiateMarketOrder function is called
      await govnft.connect(owner).mint();
      await govnft.connect(owner).transferFrom(owner.getAddress(), user.getAddress(), 1);

      // user's pending reward amount should be 0 because her or his Governance NFT was minted after initiateMarketOrder function was called
      expect(await govnft.pending(user.getAddress(), stabletoken.address)).to.equal("0");

      // owner's Governance NFT was minted before initiateMarketOrder function was called so her or his pending reward amount should be 10000000000000000000.
      // However, owner's pending reward amount is still 0 because DAO fees were not transferred to GovNFT contract successfully.
      expect(await govnft.pending(owner.getAddress(), stabletoken.address)).to.equal("0");
    });
689:     function _handleOpenFees(
690:         uint _asset,
691:         uint _positionSize,
692:         address _trader,
693:         address _tigAsset,
694:         bool _isBot
695:     )
696:         internal
697:         returns (uint _feePaid)
698:     {
699:         IPairsContract.Asset memory asset = pairsContract.idToAsset(_asset);
...
732:         unchecked {
733:             uint _daoFeesPaid = _positionSize * _fees.daoFees / DIVISION_CONSTANT;
734:             _feePaid =
735:                 _positionSize
736:                 * (_fees.burnFees + _fees.botFees) // get total fee%
737:                 / DIVISION_CONSTANT // divide by 100%
738:                 + _daoFeesPaid;
739:             emit FeesDistributed(
740:                 _tigAsset,
741:                 _daoFeesPaid,
742:                 _positionSize * _fees.burnFees / DIVISION_CONSTANT,
743:                 _referrer != address(0) ? _positionSize * _fees.referralFees / DIVISION_CONSTANT : 0,
744:                 _positionSize * _fees.botFees / DIVISION_CONSTANT,
745:                 _referrer
746:             );
747:             IStable(_tigAsset).mintFor(address(this), _daoFeesPaid);
748:         }
749:         IStable(_tigAsset).approve(address(gov), type(uint).max);   // @audit add this line of code for POC purpose
750:         gov.distribute(_tigAsset, IStable(_tigAsset).balanceOf(address(this)));
751:     }
    it.only(`If calling initiateMarketOrder function can correctly send DAO fees to GovNFT contract, Governance NFT holder, whose NFT was minted before initiateMarketOrder function is called,
             can receive deserved rewards after initiateMarketOrder function is called`, async function () {
      let TradeInfo = [parseEther("1000"), MockDAI.address, StableVault.address, parseEther("10"), 0, true, parseEther("30000"), parseEther("10000"), ethers.constants.HashZero];
      let PriceData = [node.address, 0, parseEther("20000"), 0, 2000000000, false];
      let message = ethers.utils.keccak256(
        ethers.utils.defaultAbiCoder.encode(
          ['address', 'uint256', 'uint256', 'uint256', 'uint256', 'bool'],
          [node.address, 0, parseEther("20000"), 0, 2000000000, false]
        )
      );
      let sig = await node.signMessage(
        Buffer.from(message.substring(2), 'hex')
      );
      
      let PermitData = [permitSig.deadline, ethers.constants.MaxUint256, permitSig.v, permitSig.r, permitSig.s, true];

      // one Governance NFT is minted to owner before initiateMarketOrder function is called
      const GovNFT = await deployments.get("GovNFT");
      const govnft = await ethers.getContractAt("GovNFT", GovNFT.address);
      await govnft.connect(owner).mint();

      // calling initiateMarketOrder function attempts to send 10000000000000000000 tigAsset as DAO fees to GovNFT contract
      await expect(trading.connect(owner).initiateMarketOrder(TradeInfo, PriceData, sig, PermitData, owner.address))
        .to.emit(trading, 'FeesDistributed')
        .withArgs(stabletoken.address, "10000000000000000000", "0", "0", "0", ethers.constants.AddressZero);

      // another Governance NFT is minted to owner and then transferred to user after initiateMarketOrder function is called
      await govnft.connect(owner).mint();
      await govnft.connect(owner).transferFrom(owner.getAddress(), user.getAddress(), 1);

      // user's pending reward amount should be 0 because her or his Governance NFT was minted after initiateMarketOrder function was called
      expect(await govnft.pending(user.getAddress(), stabletoken.address)).to.equal("0");

      // If calling initiateMarketOrder function can correctly send DAO fees to GovNFT contract, owner's pending reward amount should be 10000000000000000000
      //   because her or his Governance NFT was minted before initiateMarketOrder function was called.
      expect(await govnft.pending(owner.getAddress(), stabletoken.address)).to.equal("10000000000000000000");
    });
        IStable(_tigAsset).approve(address(gov), type(uint).max);
        gov.distribute(_tigAsset, IStable(_tigAsset).balanceOf(address(this)));
