Aave v2 Leverage Module

The AaveLeverageModule is a smart contract that enables leverage trading using Aave v2 as the lending protocol. This module is paired with a Debt Issuance Module that will call functions on this contract to keep interest accrual and liquidation state updated. Each asset is leveraged when using this module (i.e. it is not built for simple lending). Integrations mappings to specify the exchange to trade on are stored in the IntegrationRegistry.

Select Methods

lever()

function lever(ISetToken _setToken, IERC20 _borrowAsset, IERC20 _collateralAsset, uint256 _borrowQuantity, uint256 _minReceiveQuantity, string memory _tradeAdapterName, bytes memory _tradeData)

Manager only. Increases leverage for a given collateral position using an enabled borrow asset. Borrows _borrowAsset from Aave. Performs a DEX trade, exchanging the _borrowAsset for _collateralAsset. Deposits _collateralAsset to Aave and mints corresponding aToken. Note: Both collateral and borrow assets need to be enabled, and they must not be the same asset

Parameter Name	Type	Description
_setToken	ISetToken	Instance of the SetToken
_borrowAsset	address	Address of the token being borrowed and sent to the exchange
_collateralAsset	address	Address of the token that will be received from the exchange and deposited into Compound after the trade
_borrowQuantity	uint256	Borrow quantity of asset in position units
_minReceiveQuantity	uint256	Min receive quantity of collateral asset to receive post-trade in position units
_tradeAdapterName	string	Human readable name of the exchange in the integrations registry. Conforms to same interfaces as TradeModule
_tradeData	bytes	Arbitrary data for trade

delever()

function delever(ISetToken _setToken, IERC20 _collateralAsset, IERC20 _repayAsset, uint256 _redeemQuantity, uint256 _minRepayQuantity, string memory _tradeAdapterName, bytes memory _tradeData)

Manager only. Decrease leverage for a given collateral position using an enabled borrow asset. Withdraws _collateralAsset from Aave. Performs a DEX trade, exchanging the _collateralAsset for _repayAsset. Repays _repayAsset to Aave and burns corresponding debt tokens. Note: Both collateral and borrow assets need to be enabled, and they must not be the same asset.

Parameter Name	Type	Description
_setToken	ISetToken	Instance of the SetToken
_collateralAsset	address	Address of collateral asset (underlying of cToken)
_repayAsset	address	Address of asset being repaid
_redeemQuantity	uint256	Quantity of collateral asset to delever
_minRepayQuantity	uint256	Minimum amount of repay asset to receive post trade
_tradeAdapterName	string	Human readable name of the exchange in the integrations registry. Conforms to same interfaces as TradeModule
_tradeData	bytes	Arbitrary data for trade

deleverToZeroBorrowBalance()

function deleverToZeroBorrowBalance(ISetToken _setToken, IERC20 _collateralAsset, IERC20 _repayAsset, uint256 _redeemQuantity, string memory _tradeAdapterName, bytes memory _tradeData)

Manager only. Pays down the borrow asset to 0 selling off a given amount of collateral asset. Withdraws _collateralAsset from Aave. Performs a DEX trade, exchanging the _collateralAsset for _repayAsset. Minimum receive amount for the DEX trade is set to the current variable debt balance of the borrow asset. Repays received _repayAsset to Aave which burns corresponding debt tokens. Any extra received borrow asset is updated as equity. No protocol fee is charged.

Note: Both collateral and borrow assets need to be enabled, and they must not be the same asset. The function reverts if not enough collateral asset is redeemed to buy the required minimum amount of _repayAsset.

Parameter Name	Type	Description
_setToken	ISetToken	Instance of the SetToken
_collateralAsset	address	Address of collateral asset (underlying of cToken)
_repayAsset	address	Address of asset being repaid
_redeemQuantity	uint256	Quantity of collateral asset to delever
_tradeAdapterName	string	Human readable name of the exchange in the integrations registry. Conforms to same interfaces as TradeModule
_tradeData	bytes	Arbitrary data for trade

sync()

function sync(ISetToken _setToken)

Anyone callable. Sync Set positions with ALL enabled Aave collateral and borrow positions. For collateral assets, update aToken default position. For borrow assets, update external borrow position.

• Collateral assets may come out of sync when interest is accrued or a position is liquidated

• Borrow assets may come out of sync when interest is accrued or position is liquidated and borrow is repaid

Note: In Aave, both collateral and borrow interest is accrued in each block by increasing the balance of aTokens and debtTokens for each user, and 1 aToken = 1 variableDebtToken = 1 underlying.

Parameter Name	Type	Description
_setToken	ISetToken	Address of the SetToken

initialize()

function initialize(ISetToken _setToken, IERC20[] memory _collateralAssets, IERC20[] memory _borrowAssets)

Manager only. Initializes this module to the SetToken. Only callable by the SetToken's manager. Note: managers can enable collateral and borrow assets that don't exist as positions on the SetToken

Parameter Name	Type	Description
_setToken	ISetToken	Address of the SetToken
_collateralAssets	IERC20[]	Underlying tokens to be enabled as collateral in the SetToken
_borrowAssets	IERC20[]	Underlying tokens to be enabled as borrow in the SetToken