MIMOAutoRebalance

The MIMOAutoRebalance action contract handle the super vault empty vault logic described in Automated Rebalance.

Process Flow

Write Methods

setAutomation(uint256 vaultId, AutomatedVault calldata autoParams)

Sets a vault automation parameters.

Requirements :

• Caller must be the MIMOProxy owner the vault or the MIMOProxy owner

Param Name	Type	Description
vaultId	uint256
autoParams	struct	AutomatedVault struct containing all automation parameters

AutomatedVault

Param Name	Type	Description
isAutomated	bool	true if vault is automated false if not
toCollateral	address	Collateral to rebalance to
allowedVariation	uint256	The maximum allowed slippage on rebalancing swaps
targetRatio	uint256	Target ratio that must be reach upon each rebalance operation
triggerRatio	uint256	Minimum vault ratio that must be reached in order to perform a rebalance operation
mcrBuffer	uint256	Rebalancing vault MCR buffer padding
fixedFee	uint256	Fixed fee paid to the keeper
varFee	uint256	Variable fee paid to the keeper

rebalance(uint256 vaultId, IMIMOSwap.SwapData calldata swapData)

Performs a rebalance on a vault on behalf of a vault owner.

Requirements :

• Contract must be unpaused

• Vault must have been created through the user's MIMOProxy

• Vault must be automated

• Maximum daily operation must have not been reached

• Rebalanced vault ratio must lower or equal then set triggerRatio

• The change in vault value due to the rebalance operation must be lower or equal then the allowedVariation set by the owner

• The final vault ratio must be greater or equal then the minRatio set by the owner

Param Name	Type	Description
vaultId	uint256	Id of the vault to rebalance
swapData	struct	SwapData struct containing aggregator swap parameters

executeOperation(address[] calldata assets, uint256[] calldata amounts, uint256[] calldata premiums, address initiator, bytes calldata params

AAVE Pool contract flash loan callback function.

Requirements :

• Contract must be unpaused

• Can only be called by the AAVE Pool contract

• Flash loan initiator must be the MIMOProxy

Param Name	Type	Description
assets	address[]	Address array with one element corresponding to the address of the target vault asset
amounts	uint256[]	Uint array with one element corresponding to the amount of the target vault asset
premiums	uint256[]	Uint array with one element corresponding to the flashLoan fees
initiator	address	Initiator of the flashloan; can only be MIMOProxy owner
params	bytes	Bytes sent by this contract containing MIMOProxy owner, target vault id, SwapData struct

View Methods

getAmounts(uint256 vaultId, address toCollateral)

Returns the rebalance amounts for specific vault id.

Call Params

Name	Type	Description
vaultId	uint256	Id of the vault to rebalance
toCollateral	address	Collateral to rebalance to

Return Values

Name	Type	Description
rebalanceAmount	uint256	Amount to rebalance
mintAmount	uint256	Amount to mint on vault B
autoFee	uint256	Automation fee

rebalanceAmount calculation :

$$rebalanceValue = \frac{targetRatio * (vaultDebt + fixedFee) - collateralValue}{\frac{targetRatio - (mcrB + mcrBuffer) * flashLoanfee}{mcrB + mcrBuffer} - targetRatio * variableFee - 1}$$

Where mcrB is the rebalancing vault (e.g. vault with the less volatile collateral) MCR.

The rebalance value is then converted to a rebalance amount using the core protocol PriceFeed contract.

mimoRebalance()

Returns the MIMORebalance action contract address.