Adapters, Liquity & Staking

This pre-audit release introduces 3 new yield strategies(scLUSD, scUSDCv2, scWETHv2) and staking contracts for the Quartz token(sQuartz).

Major features

• 🛼 scUSDCv2 & scWETHv2 are lender-neutral versions of scUSDC/scWETH. They introduce adapters in order to borrow and supply from multiple lending protocols. Adapters can be added at will by a multi-sig and a keeper bot regularly rebalances the positions against a target loan to value ratio and allocation configuration in order to compound profits and/or de-risk positions.
• 🐤 scLUSD: Deposit LUSD which will be deposited into the Liquity Stability Pool. Receive scLUSD shares which appreciate over time and can be redeemed for LUSD. A keeper bot regularly reinvests profits which consists of discounted ETH on liquidations and Liquity community issuance ($LQTY). Strategy has exposure to Liquity, 0x exchange routing protocol and a combination oracle consisting of Chainlink ETH/USD and the Chainlink LUSD/USD price feeds.
• 💎 sQuartz: Deposit Quartz for sQuartz and over time claim performance fees from Sandclock yield strategies. Additionally receive bonus multiplier points (inspired by GMX reward mechanism) at 100% APR which can be compounded in order to claim a bigger portion of the staking rewards. Redeem sQuartz for Quartz at any time, which will proportionally burn some of the earned multiplier points for that account. The first 30 days of a deposit special rules apply: no additional deposits allowed and in order to withdraw/transfer a fee needs to be paid (starts at 10% of the amount and linearly decreases to zero over 30 days).

What's Changed

• add scUSDCv2 strategy by @brkomir in #58
• add scLUSD strategy by @coolhill in #77
• add scWETHv2 strategy by @dxganta in #54
• add staking contracts by @coolhill in #76

Full Changelog: v0.1.1...v0.1.2