getBorrowingFee(feeBase), already computed by the caller, before exemption.
getTroveMaxBorrowingCapacity(owner) (MK-101).
getTroveInterestRate(owner), in basis points (MK-101).
interestRateManager.interestRate(), the rate a refinance moves the Trove to (MK-101).
The governable percentage, read live.
TroveManager.getTroveStatus. 1 is active.
Everything evaluateRefinance needs, already read from the chain.