FlashloanAggregator

Git Source

Inherits: IFlashloanAggregator, BalancerV2FlashloanRecipient, IMorphoFlashLoanCallback, IERC3156FlashBorrower, IFlashLoanSimpleReceiver

State Variables

_EXPECTED_DATA_HASH_SLOT

Hash of the user data we expect to receive in onFlashLoan.

bytes32 public constant _EXPECTED_DATA_HASH_SLOT = 0x82495b57f77c85cf8c0395fbfa4aaf855e2e402a9c6668de75d52c07a0b11300;

caliberFactory

The address of the Caliber factory.

address public immutable caliberFactory;

balancerV2Pool

The address of the Balancer V2 pool.

address public immutable balancerV2Pool;

balancerV3Pool

The address of the Balancer V3 pool.

address public immutable balancerV3Pool;

morphoPool

The address of the Morpho pool.

address public immutable morphoPool;

dai

The address of the DAI token.

address public immutable dai;

dssFlash

The address of the Maker DSS Flash.

address public immutable dssFlash;

aaveV3AddressProvider

The address of the Aave V3 pool.

address public immutable aaveV3AddressProvider;

Functions

onlyCaliber

Modifier to check if the caller is a Caliber.

modifier onlyCaliber();

constructor

The constructor for the FlashloanAggregator.

constructor(
    address _caliberFactory,
    address _balancerV2Pool,
    address _balancerV3Pool,
    address _morphoPool,
    address _dssFlash,
    address _aaveV3AddressProvider,
    address _dai
);

Parameters

Name	Type	Description
_caliberFactory	address	The address of the Caliber factory.
_balancerV2Pool	address	The address of the Balancer V2 pool.
_balancerV3Pool	address	The address of the Balancer V3 pool.
_morphoPool	address	The address of the Morpho pool.
_dssFlash	address	The address of the Maker DSS Flash.
_aaveV3AddressProvider	address
_dai	address

requestFlashloan

The function to request a flashloan.

function requestFlashloan(FlashloanRequest calldata request) external override onlyCaliber;

Parameters

Name	Type	Description
request	FlashloanRequest	The request for the flashloan.

_dispatchFlashloanRequest

Function to dispatch the flashloan request to the correct provider.

function _dispatchFlashloanRequest(FlashloanRequest calldata request) internal;

Parameters

Name	Type	Description
request	FlashloanRequest	The request for the flashloan.

_clearExpectedDataHash

Internal function to clear the expected data hash.

function _clearExpectedDataHash() internal;

_setExpectedDataHash

Internal function to set the expected data hash.

function _setExpectedDataHash(bytes memory data) internal;

Parameters

Name	Type	Description
data	bytes	The data to set the expected data hash to.

_isValidExpectedDataHash

Internal function to check if the expected data hash is valid.

function _isValidExpectedDataHash(bytes memory data) internal view;

Parameters

Name	Type	Description
data	bytes	The data to check the expected data hash against.

_requestBalancerV2Flashloan

Function to request a flashloan from Balancer V2.

function _requestBalancerV2Flashloan(FlashloanRequest calldata request) internal;

Parameters

Name	Type	Description
request	FlashloanRequest	The request for the flashloan.

_requestBalancerV3Flashloan

Function to request a flashloan from Balancer V3.

function _requestBalancerV3Flashloan(FlashloanRequest calldata request) internal;

Parameters

Name	Type	Description
request	FlashloanRequest	The request for the flashloan.

_requestMorphoFlashloan

Function to request a flashloan from Morpho.

function _requestMorphoFlashloan(FlashloanRequest calldata request) internal;

Parameters

Name	Type	Description
request	FlashloanRequest	The request for the flashloan.

_requestDssFlashloan

Function to request a flashloan from Maker DSS Flash.

function _requestDssFlashloan(FlashloanRequest calldata request) internal;

Parameters

Name	Type	Description
request	FlashloanRequest	The request for the flashloan.

_requestAaveV3Flashloan

Function to request a flashloan from Aave V3.

function _requestAaveV3Flashloan(FlashloanRequest calldata request) internal;

Parameters

Name	Type	Description
request	FlashloanRequest	The request for the flashloan.

_handleFlashloanCallback

Catch-all function to handle the flashloan callback.

function _handleFlashloanCallback(
    address caliber,
    ICaliber.Instruction memory instruction,
    address token,
    uint256 amount
) internal;

Parameters

Name	Type	Description
caliber	address	The address of the Caliber.
instruction	ICaliber.Instruction	The instruction to execute.
token	address	The token to flashloan.
amount	uint256	The amount to flashloan.

receiveFlashLoan

function receiveFlashLoan(
    BalancerIERC20[] memory tokens,
    uint256[] memory amounts,
    uint256[] memory feeAmounts,
    bytes memory userData
) external;

balancerV3FlashloanCallback

Callback handler for Balancer V3 flashloan.

function balancerV3FlashloanCallback(
    address caliber,
    ICaliber.Instruction calldata instruction,
    address token,
    uint256 amount
) external;

onMorphoFlashLoan

Callback called when a flash loan occurs.

The callback is called only if data is not empty.

function onMorphoFlashLoan(uint256 assets, bytes calldata data) external;

Parameters

Name	Type	Description
assets	uint256	The amount of assets that was flash loaned.
data	bytes	Arbitrary data passed to the flashLoan function.

onFlashLoan

Receive a flash loan.

function onFlashLoan(address initiator, address token, uint256 amount, uint256 fee, bytes calldata data)
    external
    returns (bytes32);

Parameters

Name	Type	Description
initiator	address	The initiator of the loan.
token	address	The loan currency.
amount	uint256	The amount of tokens lent.
fee	uint256	The additional amount of tokens to repay.
data	bytes	Arbitrary data structure, intended to contain user-defined parameters.

Returns

Name	Type	Description
<none>	bytes32	The keccak256 hash of "ERC3156FlashBorrower.onFlashLoan"

executeOperation

Executes an operation after receiving the flash-borrowed asset

Ensure that the contract can return the debt + premium, e.g., has enough funds to repay and has approved the Pool to pull the total amount

function executeOperation(address asset, uint256 amount, uint256 premium, address initiator, bytes calldata params)
    external
    returns (bool);

Parameters

Name	Type	Description
asset	address	The address of the flash-borrowed asset
amount	uint256	The amount of the flash-borrowed asset
premium	uint256	The fee of the flash-borrowed asset
initiator	address	The address of the flashloan initiator
params	bytes	The byte-encoded params passed when initiating the flashloan

Returns

Name	Type	Description
<none>	bool	True if the execution of the operation succeeds, false otherwise

ADDRESSES_PROVIDER

function ADDRESSES_PROVIDER() external view returns (IPoolAddressesProvider);

POOL

function POOL() external view returns (IPool);