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 amount

• minExpectedBalance: Minimum expected balance

Returns:

• unrealizedProfit: Unrealized profit amount

• loss: Loss amount

• debtPayment: Debt payment amount

_invest

function _invest(uint256 amount, uint256 minOutputAfterInvestment) internal returns (uint256)

Deposits assets into Sommelier Cellar.

Parameters:

• amount: Amount to invest

• minOutputAfterInvestment: 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