This page describes the BNB Core JumpRateModel source in venus-protocol v10.3.0. A market can point to this model directly or through a CheckpointView wrapper.
Approximate blocks per year used to convert annual constructor parameters to per-block rates.
Construct an interest rate model
constructor ( uint256 baseRatePerYear , uint256 multiplierPerYear , uint256 jumpMultiplierPerYear , uint256 kink_ , uint256 blocksPerYear_ ) public
Name Type Description baseRatePerYear uint256 The approximate target base APR, as a mantissa (scaled by 1e18) multiplierPerYear uint256 The rate of increase in interest rate wrt utilization (scaled by 1e18) jumpMultiplierPerYear uint256 The multiplierPerBlock after hitting a specified utilization point kink_ uint256 The utilization point at which the jump multiplier is applied blocksPerYear_ uint256 The approximate number of blocks per year assumed by this model
Calculates the utilization rate of the market: borrows / (cash + borrows - reserves)
function utilizationRate ( uint256 cash , uint256 borrows , uint256 reserves ) public pure returns ( uint256 )
Name Type Description cash uint256 The amount of cash in the market borrows uint256 The amount of borrows in the market reserves uint256 The amount of reserves in the market (currently unused)
Name Type Description [0] uint256 The utilization rate as a mantissa between [0, 1e18]
Calculates the current borrow rate per block, with the error code expected by the market
function getBorrowRate ( uint256 cash , uint256 borrows , uint256 reserves ) public view returns ( uint256 )
Name Type Description cash uint256 The amount of cash in the market borrows uint256 The amount of borrows in the market reserves uint256 The amount of reserves in the market
Name Type Description [0] uint256 The borrow rate percentage per block as a mantissa (scaled by 1e18)
Calculates the current supply rate per block
function getSupplyRate ( uint256 cash , uint256 borrows , uint256 reserves , uint256 reserveFactorMantissa ) public view returns ( uint256 )
Name Type Description cash uint256 The amount of cash in the market borrows uint256 The amount of borrows in the market reserves uint256 The amount of reserves in the market reserveFactorMantissa uint256 The current reserve factor for the market
Name Type Description [0] uint256 The supply rate percentage per block as a mantissa (scaled by 1e18)
