  function _processPayment(JBDidPayData calldata _data) internal override {
    // Keep a reference to the amount of credits the beneficiary already has.
    uint256 _credits = creditsOf[_data.beneficiary];
    ...
    if (
      _data.metadata.length > 36 &&
      bytes4(_data.metadata[32:36]) == type(IJB721Delegate).interfaceId
    ) {
      ...
      // Don't mint if not desired.
      if (_dontMint) return;
      ...
    }
    ...
    // If there are funds leftover, mint the best available with it.
    if (_leftoverAmount != 0) {
      _leftoverAmount = _mintBestAvailableTier(
        _leftoverAmount,
        _data.beneficiary,
        _expectMintFromExtraFunds
      );

      if (_leftoverAmount != 0) {
        // Make sure there are no leftover funds after minting if not expected.
        if (_dontOverspend) revert OVERSPENDING();

        // Increment the leftover amount.
        creditsOf[_data.beneficiary] = _leftoverAmount;
      } else if (_credits != 0) creditsOf[_data.beneficiary] = 0;
    } else if (_credits != 0) creditsOf[_data.beneficiary] = 0;
  }
  function testPaymentNotAddedToCreditsOf() public{
    address _user = address(bytes20(keccak256('user')));
    (
      JBDeployTiered721DelegateData memory NFTRewardDeployerData,
      JBLaunchProjectData memory launchProjectData
    ) = createData();

    uint256 projectId = deployer.launchProjectFor(
      _projectOwner,
      NFTRewardDeployerData,
      launchProjectData
    );

    // Get the dataSource
    IJBTiered721Delegate _delegate = IJBTiered721Delegate(
      _jbFundingCycleStore.currentOf(projectId).dataSource()
    );

    address NFTRewardDataSource = _jbFundingCycleStore.currentOf(projectId).dataSource();

    uint256 _creditBefore = IJBTiered721Delegate(NFTRewardDataSource).creditsOf(_user);

    // Project is initiated with 10 different tiers with contributionFee of 10,20,30,40, .... , 100

    // Make payment to mint 1 NFT
    uint256 _payAmount = 10;
    _jbETHPaymentTerminal.pay{value: _payAmount}(
      projectId,
      100,
      address(0),
      _user,
      0,
      false,
      'Take my money!',
      new bytes(0)
    );

    // Minted 1 NFT
    assertEq(IERC721(NFTRewardDataSource).balanceOf(_user), 1);

    // Now, we make the payment but supply _dontMint metadata
    bool _dontMint = true;
    uint16[] memory empty;
    _jbETHPaymentTerminal.pay{value: _payAmount}(
      projectId,
      100,
      address(0),
      _user,
      0,
      false,
      'Take my money!',
      //new bytes(0)
      abi.encode(
        bytes32(0),
        type(IJB721Delegate).interfaceId,
        _dontMint,
        false,
        false,
        empty
        )
    );

    // NFT not minted
    assertEq(IERC721(NFTRewardDataSource).balanceOf(_user), 1);

    // Check that credits of user is still the same as before even though we have made the payment
    assertEq(IJBTiered721Delegate(NFTRewardDataSource).creditsOf(_user),_creditBefore);

  }
- if(_dontMint) return;
+ if(_dontMint){ creditsOf[_data.beneficiary] += _value; }
