AaveV3Borrower

IMPLEMENTATION

address IMPLEMENTATION

address of the implementation contract

ORACLE

contract IPriceOracleGetter ORACLE

price oracle and pool address can be obtained from AAVE's address provider contract

INTEREST_RATE_MODE

uint256 INTEREST_RATE_MODE

REFERRAL_CODE

uint16 REFERRAL_CODE

constructor

constructor(address _addressesProvider, uint256 _referralCode, uint256 _interestRateMode) public

contract's constructor

Parameters

Name	Type	Description
_addressesProvider	address	address of AAVE's address provider
_referralCode	uint256	code used by aave to identify certain partners, this can be safely set to 0
_interestRateMode	uint256	interest rate mode for borrowing assets. 0 for none, 1 for stable, 2 for variable

debtToken

function debtToken(contract IERC20 asset, uint256 interestRateMode) public view returns (contract ICreditDelegationToken debtTkn)

convenience function to obtain the address of the non transferrable debt token overlying of some asset

Parameters

Name	Type	Description
asset	contract IERC20	the underlying asset
interestRateMode	uint256	the interest rate (stable or variable) of the debt token

Return Values

Name	Type	Description
debtTkn	contract ICreditDelegationToken	the overlying debt token

_staticdelegatecall

function _staticdelegatecall(bytes data) external

intermediate function to allow a call to be delagated to IMPLEMENTATION while preserving the a view attribute.

scheme is as follows: for some view function f of IMPLEMENTATION, one does staticcall(_staticdelegatecall(f)) which will retain for the view attribute

maxGettableUnderlying

function maxGettableUnderlying(contract IERC20 asset, bool tryBorrow, address onBehalf) public view returns (uint256 maxRedeemableUnderlying, uint256 maxBorrowAfterRedeemInUnderlying)

Returns max redeem R and borrow capacity B|R, which would occur after the redeem.

maxBorrowAfterRedeemInUnderlying is always 0 if tryBorrow is false.

Parameters

Name	Type	Description
asset	contract IERC20	the underlying asset to withdraw and potentially borrow
tryBorrow	bool	also computes borrow capacity after all redeem is complete (costs extra gas).
onBehalf	address	user for whom max redeem/borrow is computed

Return Values

Name	Type	Description
maxRedeemableUnderlying	uint256	maximum amount onBehalf can redeem of asset
maxBorrowAfterRedeemInUnderlying	uint256	max amount onBehalf can borrow in asset ater redeeming of maxRedeemableUnderlying.

getCaps

function getCaps(contract IERC20 asset) public view returns (uint256 supplyCap, uint256 borrowCap)

_repayThenDeposit

function _repayThenDeposit(contract IERC20 token, address onBehalf, uint256 amount) internal

deposits assets on AAVE by first repaying debt if any and then supplying to the pool

Parameters

Name	Type	Description
token	contract IERC20	the asset one is depositing
onBehalf	address	the account one is repaying and supplying for
amount	uint256	of asset one is repaying and supplying

_redeemThenBorrow

function _redeemThenBorrow(contract IERC20 token, address onBehalf, uint256 amount, bool strict, address recipient) internal returns (uint256 got)

withdraws liquidity on aave, if not enough liquidity is withdrawn, tries to borrow what's missing.

if onBehalf != address(this) then this needs to be approved by onBehalf using approveDelegation of the overlying debt token function will only try to borrow if less than amount was redeemed and will not try to borrow more than what is missing, even if strict is not required. this is forced by aave v3 currently not allowing to repay a debt that was incurred on the same block (so no gas optim can be used). Repaying on the next block would be dangerous as onBehalf position could possibly be liquidated

Parameters

Name	Type	Description
token	contract IERC20	the asset that needs to be redeemed
onBehalf	address	the account whose collateral is beeing withdrawn and borrowed upon.
amount	uint256	the target amount of token one needs to redeem
strict	bool	whether call allows contract to redeem more than amount (for gas optimization).
recipient	address	the target address to which redeemed and borrowed tokens should be sent

Return Values

Name	Type	Description
got	uint256	how much asset was transfered to caller

_borrow

function _borrow(contract IERC20 token, uint256 amount, address onBehalf) internal

tries to borrow some assets from the pool

Parameters

Name	Type	Description
token	contract IERC20	the asset one is borrowing
amount	uint256
onBehalf	address	the account whose collateral is being used to borrow (caller must be approved by onBehalf -if different- using approveDelegation from the corresponding debt token (variable or stable))

_repay

function _repay(contract IERC20 token, uint256 amount, address onBehalf) internal returns (uint256 repaid)

repays debt to the pool

Parameters

Name	Type	Description
token	contract IERC20	the asset one is repaying
amount	uint256	of assets one is repaying
onBehalf	address	account whose debt is being repaid

borrowed

function borrowed(address underlying, address account) public view returns (uint256 debt)

returns the debt of a user

user can only borrow underlying in variable or stable, not both

Parameters

Name	Type	Description
underlying	address	the asset whose debt balance is being viewed
account	address	the account whose debt balance is being viewed

Return Values

Name	Type	Description
debt	uint256	the amount of tokens (in units of underlying) that should be repaid to the pool