XYield

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This is the beta version of CDP Yield Optimising strategy for Aave deployed on Optimism mainnet:

CR = (totalCollateralBase / totalDebtBase)*100

Health factor = CR / 100

(totalDebtBase will almost remain constant while totalCollateralBase will be variable)

CR1: Current/real-time CR

CR2: CR at which tap-in should trigger

We have 3 user inputs/variables:

1. ⁠Tap-in threshold: TIT : Increase in CR from the current CR to trigger the tap-in sequence = (CR2 - CR1)

2. Tap-in gain: TIG : Percentage of the CR increase equivalent collateral to liquidate on tap-in. {Range: 0 - 100%}

3. Buy back threshold: BBT : Decrease in CR from the tap-in point i.e. CR2 to trigger the tap-out sequence {Minimum TOP: TIT*TIG/100}

Tap-in point in CR: CR2

Buy back point in CR: CR2 - BBT

Intermediate output parameters calculated from the frontend inputs and parsed to the contract:

• Tap-in point in collateral price: CR2*totalDebtBase/100
• Buy back point in collateral price: (CR2 - BBT)*totalDebtBase/100
• Collateral to liquidate on tap-in = (CR2 - CR1)totalDebtBaseTIG/10000

Tap-in sequence: Withdraw collateral (equals to collateralToLiquidate) and then liquidate it to USDT on Uniswap

Buy back sequence: Buy back collateral from all the USDT on Uniswap and then deposit it all as the collateral to Aave pool.

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Dependent contracts:

• Aave Gateway: 0xe9E52021f4e11DEAD8661812A0A6c8627abA2a54
• Chainlink Price Feed: 0x13e3Ee699D1909E989722E753853AE30b17e08c5
• V3 Uniswap Router: 0xCb1355ff08Ab38bBCE60111F1bb2B784bE25D7e8
• USDT Contract Address: 0x94b008aA00579c1307B0EF2c499aD98a8ce58e58