Defi Lending Concepts 1

DefaultReserveInterestRateStrategy2.sol

pragma solidity ^0.8.13;

function getOverallBorrowRateInternal(
    uint256 _totalBorrowsStable,
    uint256 _totalBorrowsVariable,
    uint256 _currentVariableBorrowRate,
    uint256 _currentAverageStableBorrowRate
) internal pure returns (uint256) {
    uint256 totalBorrows = _totalBorrowsStable.add(_totalBorrowsVariable);

    if (totalBorrows == 0) return 0;

    uint256 weightedVariableRate = _totalBorrowsVariable.wadToRay().rayMul(
        _currentVariableBorrowRate
    );

    uint256 weightedStableRate = _totalBorrowsStable.wadToRay().rayMul(
        _currentAverageStableBorrowRate
    );

    uint256 overallBorrowRate = weightedVariableRate.add(weightedStableRate).rayDiv(
        totalBorrows.wadToRay()
    );

    return overallBorrowRate;
}
}