BaseStrategy

harvestTrigger

Provides a signal to the keeper that harvest() should be called. The keeper will provide the estimated gas cost that they would pay to call harvest() and this function should use that estimate to make a determination if calling it is "worth it" for the keeper.

function harvestTrigger(uint256 callCost) public virtual view returns (bool)

Parameters:

Name	Type	Description
callCost	uint256	Amount of cost for calling harvest()

Return value:

Type	Description
bool	True if harvest() should be called, false if otherwise

harvest

Harvests the Strategy, recognizing any profits or losses and adjusting the Strategy's position.

function harvest() external virtual onlyKeepers

Events emitted:

• Harvested(profit, loss, debtPayment, debtOutstanding)

withdraw

Withdraws _amountNeeded to vault

function withdraw(uint256 _amountNeeded) external virtual returns (uint256 _loss)

Parameters:

Name	Type	Description
_amountNeeded	uint256	Amount of tokens to withdraw

Return value:

Name	Type	Description
_loss	uint256	Any losses created while liquidating tokens

prepareMigration

Do anything necessary to prepare this Strategy for migration, such as transferring any reserve or LP tokens, CDPs, or other tokens or stores of value.

function prepareMigration(address _newStrategy) internal virtual

Parameters:

Name	Type	Description
_newStrategy	address	New strategy’s vault address

migrate

Transfers all want tokens from this strategy to a new strategy. Can only be called by the governance or the vault.

function migrate(address _newStrategy) external

Parameters:

Name	Type	Description
_newStrategy	address	New strategy’s vault address

sweep

Removes tokens from this Strategy that are not the type of tokens managed by this Strategy.

function sweep(address _token) external virtual onlyGovernance

Parameters:

Name	Type	Description
_token	address	Address of token to transfer out of this strategy’s vault

Events emitted:

• IERC20Upgradeable(_token).safeTransfer(governance(), IERC20Upgradeable(_token).balanceOf(address(this)))