CoolerLtvOracle.sol

CoolerLtvOracle controls how much USDS can be borrowed against gOHM. Rather than using external market prices, it uses two key thresholds:

• Origination LTV: Maximum borrow amount for new loans

• Liquidation LTV: Higher threshold amount that triggers liquidations

The Origination LTV can only increase over time through a linear "drip" system - this means each increase must specify a target value and the time period to reach it. The Liquidation LTV is set as a premium above the Origination LTV.

Functions

View Functions

currentLtvs()

• Returns current origination and liquidation LTVs

• Calculates origination LTV based on drip progress

• Adds premium to get liquidation LTV

currentOriginationLtv()

• Returns current max borrow amount

• If before target time: calculates based on slope

• If after target time: returns target value

currentLiquidationLtv()

• Returns current liquidation threshold

• Calculated as origination LTV + premium

Admin Functions

setOriginationLtvAt(uint96 targetValue, uint32 targetTime)

• Sets new origination LTV target and time to reach it

• Must increase or stay same (cannot decrease)

• Checks against max delta and rate of change limits

setLiquidationLtvPremiumBps(uint16 premiumBps)

• Sets premium above origination LTV for liquidations

• Cannot exceed max premium

• Cannot decrease current premium

Safety Bounds

setMaxOriginationLtvDelta(uint96 maxDelta)

• Maximum allowed increase in origination LTV

setMinOriginationLtvTargetTimeDelta(uint32 minTargetTimeDelta)

• Minimum time period for LTV changes

setMaxOriginationLtvRateOfChange(uint96 originationLtvDelta, uint32 timeDelta)

• Maximum speed of LTV increases