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GhoSteward

This helper contract manages risk parameters of the GHO reserve within the Aave Facilitator.

info

This contract must be granted PoolAdmin in the Aave V3 Ethereum Pool and BucketManager in GHO Token.

Only the Risk Council is able to action contract's functions.

Only the Aave DAO is able to extend the steward's lifespan.

This page shows the public constant state variables, immutable state variables, external write and view methods within the GhoSteward contract. The source code is available on GitHub.

Constant State Variables​

MINIMUM_DELAY​

uint256 public constant MINIMUM_DELAY = 5 days

The minimum delay that must be respected between updating a specific parameter twice.

BORROW_RATE_CHANGE_MAX​

uint256 public constant BORROW_RATE_CHANGE_MAX = 0.0050e4

The maximum percentage change for borrow rate updates (e.g. 0.0050e4 is 50, which results in 0.5%). The new borrow rate can only differ up to this percentage.

STEWARD_LIFESPAN​

uint40 public constant STEWARD_LIFESPAN = 60 days

The lifespan of the steward.

Immutable State Variables​

POOL_ADDRESSES_PROVIDER​

address public immutable POOL_ADDRESSES_PROVIDER

The address of the PoolAddressesProvider of Aave V3 Ethereum Facilitator.

GHO_TOKEN​

address public immutable GHO_TOKEN

The address of the GhoToken.

RISK_COUNCIL​

address public immutable RISK_COUNCIL

The address of the RiskCouncil.

Write Methods​

updateBorrowRate​

function updateBorrowRate(uint256 newBorrowRate) external onlyRiskCouncil

Updates the borrow rate of GHO, only if:

  • respects the debounce duration (5 day pause between updates must be respected)
  • the update changes up to 0.50% upwards or downwards
info

Only callable by Risk Council.

Input Parameters​

NameTypeDescription
newBorrowRateuint256The new variable borrow rate (expressed in ray) (e.g. 0.0150e27 results in 1.50%)

updateBucketCapacity​

function updateBucketCapacity(uint128 newBucketCapacity) external onlyRiskCouncil

Updates the Bucket Capacity of the Aave V3 Ethereum Pool Facilitator, only if:

  • respects the debounce duration (5 day pause between updates must be respected)
  • the update changes up to 100% upwards
info

Only callable by Risk Council.

Input Parameters​

NameTypeDescription
newBucketCapacityuint128The new bucket capacity of the facilitator

extendStewardExpiration​

function extendStewardExpiration() external onlyOwner

Extends the steward expiration date by STEWARD_LIFESPAN.

info

Only callable by the Aave Short Executor.

Emits the StewardExpirationUpdated event.

View Methods​

getTimelock​

function getTimelock() external view returns (Debounce memory)

Returns the timelock values for all parameters updates.

Return Values​

TypeDescription
structThe Debounce struct with parameters' timelock

getStewardExpiration​

function getStewardExpiration() external view returns (uint40)

Returns the expiration time of the steward.

Return Values​

TypeDescription
uint40The expiration unix time of the steward (in seconds)

getAllStrategies​

function getAllStrategies() external view returns (address[] memory)

Returns the list of Interest Rate Strategies for GHO.

Return Values​

TypeDescription
address[]An array of GhoInterestRateStrategy addresses