2.0.0

The "all clear" milestone release. This is the first release that received any public use at all.

• Bump solidity version to 0.8.17
• Support multiple beneficiaries via the FacadeWrite
• Add RToken.issueTo(address recipient, uint256 amount, ..) and RToken.redeemTo(address recipient, uint256 amount, ..) to support issuance/redemption to a different address than msg.sender
• Add RToken.redeem*(.., uint256 basketNonce) to enable msg sender to control expectations around partial redemptions
• Add RToken.issuanceAvailable() + RToken.redemptionAvailable()
• Add FacadeRead.primeBasket() + FacadeRead.backupConfig() views
• Many external libs moved to internal
• Switch from price point estimates to price ranges; all prices now have a low and high. Impacted interface functions:
  • IAsset.price()
  • IBasketHandler.price()
• Replace IAsset.fallbackPrice() with IAsset.lotPrice(). The lot price is the current price when available, and a fallback price otherwise.
• Introduce decaying fallback prices. Over a finite period of time the fallback price goes to zero, linearly.
• Remove IAsset.pricePerTarget() from asset interface
• Remove rewards earning and sweeping from RToken
• Add safeMulDivCeil() to ITrading traders. Use when overflow is possible from 2 locations:
  • RecollateralizationLib.sol:L271
  • TradeLib.sol:L59
• Introduce config struct to encapsulate Collateral constructor params more neatly
• In general it should be easier to write Collateral plugins. Implementors should only ever have to override 4 functions: tryPrice(), refPerTok(), targetPerRef(), and claimRewards().
• Add .div(1 - maxTradeSlippage) to calculation of shortfallSlippage in RecollateralizationLib.sol:L188.
• FacadeRead:
  • remove .pendingIssuances() + .endIdForVest()
  • refactor calculations in basketBreakdown()
• Bugfix: Fix claim rewards from traders in FacadeAct
• Bugfix: Do not handout RSR rewards when no one is staked
• Bugfix: Support small redemptions even when the RToken supply is massive
• Bump component-wide version() getter to 2.0.0
• Remove non-atomic issuance
• Replace redemption battery with issuance and redemption throttles
  • amtRate valid range: [1e18, 1e48]
  • pctRate valid range: [0, 1e18]
• Fix Furnace/StRSR reward period to 12 seconds
• Gov params:
  • --rewardPeriod
  • --issuanceRate
  • ++issuanceThrottle
  • ++redemptionThrottle
• Events:
  • --RToken.IssuanceStarted
  • --RToken.IssuancesCompleted
  • --RToken.IssuancesCanceled
  • Issuance( address indexed recipient, uint256 indexed amount, uint192 baskets ) -> Issuance( address indexed issuer, address indexed recipient, uint256 indexed amount, uint192 baskets )
  • Redemption(address indexed recipient, uint256 indexed amount, uint192 baskets ) -> Redemption(address indexed redeemer, address indexed recipient, uint256 indexed amount, uint192 baskets )
  • ++RToken.IssuanceThrottleSet
  • ++RToken.RedemptionThrottleSet
• Allow redemption while DISABLED
• Allow grantRTokenAllowances() while paused
• Add RToken.monetizeDonations() escape hatch for accidentally donated tokens
• Collateral default threshold: 5% -> 1% (+ include oracleError)
• RecollateralizationLib: Tighter basket range during recollateralization. Will now do minTradeVolume-size auctions to fill in dust rather than haircut.
• Remove StRSR.setName()/setSymbol()
• Prevent RToken exchange rate manipulation at low supply
• Prevent StRSR exchange rate manipulation at low supply
• Forward RSR directly to StRSR, bypassing RSRTrader
• Accumulate melting on Furnace.setRatio()
• Payout RSR rewards on StRSR.setRatio()
• Distinguish oracle timeouts when dealing with multiple oracles in one plugin
• Add safety during asset degregistration to ensure it is always possible to unregister an infinite-looping asset
• Fix StRSR/RToken EIP712 typehash to use release version instead of "1"
• Add FacadeRead.redeem(IRToken rToken, uint256 amount, uint48 basketNonce) to return the expected redemption quantities on the basketNonce, or revert
• Integrate with OZ 4.7.3 Governance (changes to quorum()/tproposalThreshold())