Earn Interest Rate Model (AlkemiRateModel.sol)

View Source: contracts/AlkemiRateModel.sol

↗ Extends: Exponential

See Model here

Enums

IRError

enum IRError {
 NO_ERROR,
 FAILED_TO_ADD_CASH_PLUS_BORROWS,
 FAILED_TO_GET_EXP,
 FAILED_TO_MUL_PRODUCT_TIMES_BORROW_RATE
}

Contract Members

Constants & Variables

//public members
uint256 public blocksPerYear;
address public owner;
address public newOwner;
string public contractName;

//private members
uint8 private hundred;

//internal members
struct Exponential.Exp internal SpreadLow;
struct Exponential.Exp internal BreakPointLow;
struct Exponential.Exp internal ReserveLow;
struct Exponential.Exp internal ReserveMid;
struct Exponential.Exp internal SpreadMid;
struct Exponential.Exp internal BreakPointHigh;
struct Exponential.Exp internal ReserveHigh;
struct Exponential.Exp internal SpreadHigh;
struct Exponential.Exp internal MinRateActual;
struct Exponential.Exp internal HealthyMinURActual;
struct Exponential.Exp internal HealthyMinRateActual;
struct Exponential.Exp internal MaxRateActual;
struct Exponential.Exp internal HealthyMaxURActual;
struct Exponential.Exp internal HealthyMaxRateActual;

Events

event OwnerUpdate(address indexed owner, address indexed newOwner);
event blocksPerYearUpdated(uint256  oldBlocksPerYear, uint256  newBlocksPerYear);

Modifiers

• onlyOwner

onlyOwner

modifier onlyOwner() internal

Arguments

Name	Type	Description

Functions

• changeRates(string _contractName, uint256 MinRate, uint256 HealthyMinUR, uint256 HealthyMinRate, uint256 HealthyMaxUR, uint256 HealthyMaxRate, uint256 MaxRate)

• changeBlocksPerYear(uint256 _blocksPerYear)

• transferOwnership(address newOwner_)

• acceptOwnership()

• getUtilizationRate(uint256 cash, uint256 borrows)

• getUtilizationAndAnnualBorrowRate(uint256 cash, uint256 borrows)

• getSupplyRate(address _asset, uint256 cash, uint256 borrows)

• getBorrowRate(address asset, uint256 cash, uint256 borrows)

changeRates

function changeRates(string _contractName, uint256 MinRate, uint256 HealthyMinUR, uint256 HealthyMinRate, uint256 HealthyMaxUR, uint256 HealthyMaxRate, uint256 MaxRate) public nonpayable onlyOwner

Arguments

Name	Type	Description
_contractName	string
MinRate	uint256
HealthyMinUR	uint256
HealthyMinRate	uint256
HealthyMaxUR	uint256
HealthyMaxRate	uint256
MaxRate	uint256

changeBlocksPerYear

function changeBlocksPerYear(uint256 _blocksPerYear) external nonpayable onlyOwner

Arguments

Name	Type	Description
_blocksPerYear	uint256

transferOwnership

function transferOwnership(address newOwner_) external nonpayable onlyOwner

Arguments

Name	Type	Description
newOwner_	address

acceptOwnership

function acceptOwnership() external nonpayable

Arguments

Name	Type	Description

getUtilizationRate

function getUtilizationRate(uint256 cash, uint256 borrows) internal view
returns(enum AlkemiRateModel.IRError, struct Exponential.Exp)

Arguments

Name	Type	Description
cash	uint256
borrows	uint256

getUtilizationAndAnnualBorrowRate

function getUtilizationAndAnnualBorrowRate(uint256 cash, uint256 borrows) internal view
returns(enum AlkemiRateModel.IRError, struct Exponential.Exp, struct Exponential.Exp)

Arguments

Name	Type	Description
cash	uint256
borrows	uint256

getSupplyRate

Gets the current supply interest rate based on the given asset, total cash and total borrows

function getSupplyRate(address _asset, uint256 cash, uint256 borrows) public view
returns(uint256, uint256)

Returns

Success or failure and the supply interest rate per block scaled by 1e18

Arguments

Name	Type	Description
_asset	address	The asset to get the interest rate of
cash	uint256	The total cash of the asset in the market
borrows	uint256	The total borrows of the asset in the market

getBorrowRate

Gets the current borrow interest rate based on the given asset, total cash and total borrows

function getBorrowRate(address asset, uint256 cash, uint256 borrows) public view
returns(uint256, uint256)

Returns

Success or failure and the borrow interest rate per block scaled by 1e18

Arguments

Name	Type	Description
asset	address	The asset to get the interest rate of
cash	uint256	The total cash of the asset in the market
borrows	uint256	The total borrows of the asset in the market