BaseStrategy: Storage, Modifiers, Abstract Methods

What You Are Building

The abstract parent contract that every concrete Yearn V2 strategy inherits from. BaseStrategy holds the strategy's role state (governance, strategist, keeper), the vault binding, the emergencyExit flag, and the access modifiers. It also declares the abstract methods that subclasses (e.g. StrategyAaveLender, StrategyCurveStableLP) must implement.

This is the start of the second inheritance chain in the module. The Vault chain runs sections 2-6, 9-11, 13-14, 16-17. The Strategy chain is section 8 here, then section 15 (harvest, tend).