in the compound whitepaper there is a section on how to calculate accured interest rate. It is calculated with historical index of the borrowing interest rate.

This is the how they calculate it:


How can I "translate" this into solidity?

Thanks a lot!

1 Answer 1


you can see the code that they write.the url si https://github.com/compound-finance/compound-money-market/blob/master/contracts/MoneyMarket.sol. the fuction name is 'calculateInterestIndex'.

hope this helps.

  • i am wrong.you show whitepaper is new compound code's. we need to see the new code.
    – Conwy
    Dec 9, 2022 at 2:02

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