[EPIC] Yearn v2 Strategy Support

[MickdeGraaf]

Description

Currently the PieVaults only support tokenised positions which severely limits the abilities to productively deploy the underlying assets. Adding support for Yearn strategies allows us to leverage on the great work that has already been done by others.

Initiative / goal

Allow multiple strategies to be added to each asset and emulate interactions with the strategies so they can be used without any changes.

Acceptance criteria and must have scope

External functions

• addStrategy Implement addStrategy #31
• updateStrategyDebtRatio Implement updateStrategyDebtRatio #32
• updateStrategyMinDebtPerHarvest Implement updateStrategyMinDebtPerHarvest #33
• updateStrategyMaxDebtPerHarvest Implement updateStrategyMaxDebtPerHarvest #34
• updateStrategyPerformanceFee Implement updateStrategyPerformanceFee #35
• revokeStrategy Implement revokeStrategy #36
• Overwrite balance to account for debt in strategies Overwrite balance to account for debt in strategies #37
• setEmergencyShutdown Implement setEmergencyShutdown #38
• setWithdrawalQueue Implement setWithdrawalQueue #39
• maxAvailableShares Implement maxAvailableShares #40
• migrateStrategy Implement migrateStrategy #41
• addStrategyToQueue Implement addStrategyToQueue #42
• removeStrategyFromQueue Implement removeStrategyFromQueue #43
• debtOutstanding
• creditAvailable
• expectedReturn
• report

(Will create individual stories for each function)

MISC

• 100% Unit test coverage of all functionality
• Integration tests
• Test with of multiple redeployed preexisting Yearn v2 strategies
• Audit ready

Stakeholders

@MickdeGraaf, @Alexintosh, Antonio (cannot tag)

Timeline

TBD