v3.3.0

Summary

v3.3 version of the Aave protocol, including:

• Introduction of bad debt accounting, to be compatible with the upcoming Umbrella system.
• Improvement of the liquidations close factor mechanism, and complementary ones.
• Optimisation of ReserveConfiguration bit operations.
• Misc integrations changes on Pool, PoolDataProvider, different peripheral contracts.

Changelog

-> Core

ReserveConfiguration

• The bitmasks and bit operations have been inverted, causing exactly the same output on the bitmaps data, but in a more efficient way.

Pool

• Added new events related with deficit data
• Added permissioned eliminateReserveDeficit(), by a new Umbrella role registered on the PoolAddressesProvider.
• Added new getters for commonly used addresses (a/v Token) and deficit.
• [BREAKING] Removed getReserveDataExtended(), marked as deprecated on 3.2.

Errors

• New 101-105 codes

DataTypes

• __deprecatedStableBorrowRate (not exposed already) has been replaced by deficit

ConfiguratorLogic

• Minor internal changes to fetch data more efficiently from the Pool.

ReserveLogic

• On updateState(), use reserveCache.reserveLastUpdateTimestamp as .cache() is always done just before in the protocol flow. Same for getIsVirtualAccActive().
• Added eliminateDeficit() function

LiquidationLogic

• Added new MIN_BASE_MAX_CLOSE_FACTOR_THRESHOLD and MIN_LEFTOVER_BASE public constants
• Added management of bad debt accounting (deficit) and burning, whenever it accrues.
• Introduced new logic to avoid protocol dust.

-> Periphery

AaveProtocolDataProvider

• Uses more granular getters on the Pool, saving gas and reducing future problems with backwards compatibility.
• Exposes the new deficit reserve data field via a getReserveDeficit() getter.

UIPoolDataProvider

• [BREAKING] The AggregatedReserveData struct returned from getReservesData() now has an extra deficit field.
• Backwards compatible change of type returned for networkBaseTokenPriceInUsdProxyAggregator and marketReferenceCurrencyPriceInUsdProxyAggregator.

WrappedTokenGatewayV3

• Uses more granular getters on the Pool, saving gas and reducing future problems with backwards compatibility.
• Now exposes WETH & POOL as public variables

ParaswapAdapters

• Uses more granular getters on the Pool, saving gas and reducing future problems with backwards compatibility.

EmissionManager

• setRewardOracle() now requires a different input type for rewardOracle, but backwards compatible

RewardsController

• Transparent changes on internal interface types used, no effect externally

---

All instances of the ChainlinkOracle interface have been aligned to a single version containing all methods.
While we are aware that non of the contract actually needs all methods, it improves DX within the aave-v3-origin repo to assume they do.