error in caculate PV

[mosheng-eng]

In the function _writeOff of navfeed.sol, I find an error in caculating PV(Present Value).
// first time written-off if (isLoanWrittenOff(loan) == false) { uint256 fv = futureValue(nftID_); if (uniqueDayTimestamp(lastNAVUpdate) > maturityDate_) { // write off after the maturity date overdueLoans = secureSub(overdueLoans, fv); latestNAV_ = secureSub(latestNAV_, fv); } else { // write off before or on the maturity date buckets[maturityDate_] = safeSub(buckets[maturityDate_], fv); uint256 pv = rmul(fv, rpow(discountRate, safeSub(uniqueDayTimestamp(maturityDate_), nnow), ONE)); latestDiscount = secureSub(latestDiscount, pv); latestNAV_ = secureSub(latestNAV_, pv); } }
I think you should use rdiv to caculate PV by FV.