BaseSommelierStrategy
Overview
The BaseSommelierStrategy contract serves as the foundation for strategies that interact with Sommelier protocol in the MaxAPY ecosystem. It manages deposits into Sommelier Cellars, handles reward collection, and executes withdrawals.
Errors
error NotEnoughFundsToInvest(); // Insufficient funds for investment
error CellarIsPaused(); // Sommelier Cellar is paused
error InvalidZeroAddress(); // Zero address provided
Events
event Invested(address indexed strategy, uint256 amountInvested);
event Divested(address indexed strategy, uint256 requestedShares, uint256 amountDivested);
event MinSingleTradeUpdated(uint256 minSingleTrade);
event MaxSingleTradeUpdated(uint256 maxSingleTrade);
State Variables
ICellar public cellar; // Sommelier Cellar contract
uint256 public maxSingleTrade; // Maximum size for a single trade
uint256 public minSingleTrade; // Minimum size for a single trade
Functions
Initialization Functions
initialize
function initialize(
IMaxApyVault _vault,
address[] calldata _keepers,
bytes32 _strategyName,
address _strategist,
ICellar _cellar
) public virtual initializer
Initializes the strategy with Sommelier components.
Parameters:
_vault
: MaxApy vault address_keepers
: Array of keeper addresses_strategyName
: Name of the strategy_strategist
: Strategist address_cellar
: Sommelier Cellar address
Core Functions
liquidateExact
function liquidateExact(uint256 amountNeeded) external returns (uint256 loss)
Withdraws exact amount of assets from Cellar.
Parameters:
amountNeeded
: Amount of assets to withdraw
Returns:
Amount of loss incurred
View Functions
previewLiquidate
function previewLiquidate(uint256 requestedAmount) public view returns (uint256)
Calculates expected output for a withdrawal.
Parameters:
requestedAmount
: Amount requested to withdraw
Returns:
Expected liquidated amount
previewLiquidateExact
function previewLiquidateExact(uint256 liquidatedAmount) public view returns (uint256)
Calculates input needed for desired withdrawal amount.
Parameters:
liquidatedAmount
: Desired output amount
Returns:
Required input amount
maxLiquidate
function maxLiquidate() public view returns (uint256)
Returns maximum withdrawable amount after losses.
Returns:
Maximum withdrawable amount
maxLiquidateExact
function maxLiquidateExact() public view returns (uint256)
Returns maximum withdrawable amount before losses.
Returns:
Maximum withdrawable amount before losses
Configuration Functions
setMinSingleTrade
function setMinSingleTrade(uint256 _minSingleTrade) external
Sets minimum trade size for the strategy.
Parameters:
_minSingleTrade
: New minimum trade size
setMaxSingleTrade
function setMaxSingleTrade(uint256 _maxSingleTrade) external
Sets maximum trade size for the strategy.
Parameters:
_maxSingleTrade
: New maximum trade size
Internal Functions
_prepareReturn
function _prepareReturn(
uint256 debtOutstanding,
uint256 minExpectedBalance
) internal returns (uint256 unrealizedProfit, uint256 loss, uint256 debtPayment)
Prepares strategy returns and handles profits/losses.
Parameters:
debtOutstanding
: Outstanding debt amountminExpectedBalance
: Minimum expected balance
Returns:
unrealizedProfit
: Unrealized profit amountloss
: Loss amountdebtPayment
: Debt payment amount
_invest
function _invest(uint256 amount, uint256 minOutputAfterInvestment) internal returns (uint256)
Deposits assets into Sommelier Cellar.
Parameters:
amount
: Amount to investminOutputAfterInvestment
: Minimum expected shares
Returns:
Amount of deposits received
_divest
function _divest(uint256 shares) internal returns (uint256)
Withdraws assets from Sommelier Cellar.
Parameters:
shares
: Amount of shares to withdraw
Returns:
Amount of assets received
Internal View Functions
_shareValue
function _shareValue(uint256 shares) internal view returns (uint256)
Calculates underlying value of Cellar shares.
Parameters:
shares
: Amount of shares
Returns:
Underlying asset value
_sharesForAmount
function _sharesForAmount(uint256 amount) internal view returns (uint256)
Calculates shares needed for given amount.
Parameters:
amount
: Amount of underlying assets
Returns:
Required shares amount
_shareBalance
function _shareBalance() internal view returns (uint256)
Returns strategy's Cellar share balance.
Returns:
Current share balance
_estimatedTotalAssets
function _estimatedTotalAssets() internal view returns (uint256)
Calculates total assets under management.
Returns:
Total assets value
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