JumpRateModelV2

JumpRateModelV2 uses one slope up to kink and a steeper slope above it. This page consolidates the current contract; there is no separate BaseJumpRateModelV2 contract in v4.4.0.

Constructor

constructor(
    uint256 baseRatePerYear,
    uint256 multiplierPerYear,
    uint256 jumpMultiplierPerYear,
    uint256 kink,
    IAccessControlManagerV8 accessControlManager,
    bool timeBased,
    uint256 blocksPerYear
)

The three annual rate inputs are divided by blocksOrSecondsPerYear() and stored per slot. When timeBased is true, blocksPerYear must be zero and the inherited clock uses 31,536,000 seconds/year. When it is false, blocksPerYear must be nonzero.

The public storage names baseRatePerBlock, multiplierPerBlock, and jumpMultiplierPerBlock are retained for compatibility. On a time-based deployment they hold per-second values despite those names.

Rate functions

function getBorrowRate(
    uint256 cash,
    uint256 borrows,
    uint256 reserves,
    uint256 badDebt
) external view returns (uint256);

function getSupplyRate(
    uint256 cash,
    uint256 borrows,
    uint256 reserves,
    uint256 reserveFactorMantissa,
    uint256 badDebt
) public view returns (uint256);

function utilizationRate(
    uint256 cash,
    uint256 borrows,
    uint256 reserves,
    uint256 badDebt
) public pure returns (uint256);

For utilization u ≤ kink:

borrow rate = baseRatePerBlock + u × multiplierPerBlock

Above the kink, the model adds jumpMultiplierPerBlock × (u - kink) to the rate at the kink. All values are 1e18 mantissas and the result is per slot.

Parameter updates

function updateJumpRateModel(
    uint256 baseRatePerYear,
    uint256 multiplierPerYear,
    uint256 jumpMultiplierPerYear,
    uint256 kink
) external;

The call is authorized by AccessControlManager using the signature updateJumpRateModel(uint256,uint256,uint256,uint256). Record the effective block whenever parameters are changed; constructor data alone is not the current configuration.