The parameterized model described in section 2.4 of the original Venus Protocol whitepaper
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 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) |
| 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) |
