# BaseStrategy The `BaseStrategy` provides a foundation for creating ERC-4626 compliant vaults, which integrate seamlessly with a `TokenizedStrategy` implementation contract. This structure allows for ease in developing customizable strategies while maintaining a consistent interface and functionality through delegation. ### **Modifiers** * **onlySelf**: Ensures that the function is called internally by the strategy itself, typically to confirm actions are a result of delegate calls from the strategy to the `TokenizedStrategy`. * **onlyManagement**: Verifies that the caller is authorized under the strategy’s management role, controlling strategy operational parameters. * **onlyKeepers**: Restricts function access to authorized keepers or management, facilitating routine maintenance and operational tasks. * **onlyEmergencyAuthorized**: Limits access to emergency functions to addresses with emergency authorization, enhancing security and control in crisis situations. ### **Immutable Variables** * **tokenizedStrategyAddress**: Address of the `TokenizedStrategy` implementation used across all strategies for handling logic and storage. * **TokenizedStrategy**: A reference to the `TokenizedStrategy` instance, treating the strategy as if it’s a library for internal function calls. * **asset**: The ERC20 token that the strategy operates on, used for yield-generating activities. ### **Functions to Override** * **\_deployFunds(uint256 \_amount)**: Handles the deployment of specified amounts of the asset into yield-generating positions. * **\_freeFunds(uint256 \_amount)**: Designed to release funds from investment positions, adjusting the strategy’s asset allocation. * **\_harvestAndReport()**: Gathers yield and rebalances the strategy’s assets to reflect the actual holdings accurately. ### **Optional Functions to Override** * **\_tend(uint256 \_totalIdle)**: Manages the strategy’s assets between reporting periods, optimizing yield generation and position management. * **\_tendTrigger()**: Indicates whether the `_tend` function should be invoked, based on specific strategy conditions or thresholds. ### **TokenizedStrategy Integration** * **deployFunds(uint256 \_amount)**: Delegates fund deployment to the `TokenizedStrategy`, allowing it to handle the specifics of asset investment. * **freeFunds(uint256 \_amount)**: Delegates the release of funds to the `TokenizedStrategy`, ensuring that withdrawal requests are honored efficiently. * **harvestAndReport()**: Provides an accurate and updated accounting of the strategy’s total assets, delegating reporting to the `TokenizedStrategy`. ### **Strategy Management and Maintenance** * **tendThis(uint256 \_totalIdle)**: Facilitates the active management of the strategy’s resources, optimizing asset allocation and performance. * **shutdownWithdraw(uint256 \_amount)**: Allows for the strategic withdrawal of funds in emergency scenarios, managed through the `TokenizedStrategy` to ensure consistency and reliability. ### **Security and Delegation Features** * **\_delegateCall(bytes memory \_calldata)**: Facilitates direct interactions with the `TokenizedStrategy` by forwarding calls and handling returned data or errors. * **fallback()**: Ensures all unspecified calls or data sent to the strategy are forwarded to the `TokenizedStrategy`, leveraging its logic and storage capabilities. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.fathom.fi/vaults/interfaces/basestrategy.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.