Release 0.7

[dapp-whisperer]

Release Candidate Changelog

Release 0.6 Changes

High Level Features

• Simplified priceFeed, with governance over primary oracle. Hybrid solution uses the existing PriceFeed mechanics (which combines dual chainlink feeds with validity state machine + potential backup oracle) as the primary oracle in the new design.
• Rounding issue scope verification and research project around potential rearchitectures
  • Practically mitigated by enforcing a 1000 wei minimum debt, and 1000 wei minimum change of debt. There is also a 1000 wei minimum change of collShares on user operations.
• New TWAP on totalDebt to prevent spot manipulation of totalDebt via flashloan to reduce redemption fee scaling.
• Governance work on timelock and configuration of highsec / lowsec timelocks.

PRs

• fix: certora prover return value #720 Mid-contest fix for Certora prover
• Testing simplified oracle #737 Introduce simplified "brainead" oracle
• C4 Leverage Macro Fixes #727 Fixes for Leverage macro, now used as a basis for Zaps
• fix forge coverage #721 Forge coverage doesn't work with multiple complier versions, resolved so we can use it
• Add accounting data for collSurplus allocations #730 Track the source CDP for each collSurplus as well as independenly account for collateralShares and liquidatorRewardShares
• C4 173 Mitigation #725 Reinsert partially redeemed CDP after all fully redeemed CDPs are removed
• fix governor related issue reported by C4 #742 Implement more view functions on Governance
• fix: flashloans + redeemcollateral coverage #741 Allow flashLoans to be called in TargetFunctions (oversight), and clamps partialRedemption parameters to create more valid runs.
• Feat fixed coll #739 Made test Collateral function exactly like stETH
• WIP - Feat oracle simplified #723 Braindead Oracle primary PR with Echidna Tester
• Enforcing 1000 wei min change #747 Enforce minimum 100 wei debt, and 1000 wei changes for debt, along with required test modifications.
• feat: add timelocks #722 Add timelocks and lowsec / highsec governance configuration
• Minimum Viable TWAP #736 Minimum viable TWAP - track totalDebt value over time to prevent spot manipulation of totalDebt via FL to reduce redemption fee at scale
• PriceFeed Naming Convention #744 Rename braindeadFeed to eBTC feed

Release 0.7 Changes

High Level Changes

• CdpId's array was removed as it's sole purpose was to allow random access on-chain into list which was deemed not worth of storage.
• Combined with switching liquidatorRewardShares to a uint128, it frees up a storage slot write on Cdp opens which is meaningful optimisation at low risk.
• A new chainlink adapter combines the ETH/USD and BTC/USD feeds to get the ETH/BTC price, rather than using that feed directly.
• The stETH:ETH rate is now read as a fixed 1:1 by default, rather than the market rate. There is a governance ability to switch the feed to the market rate oracle.

PRs

• Offchain Random List Access #760 removes CdpId's array for random access into list to free up storage space
• Last Good Price - Dedup #759 lastGoodPrice is no longer stored on priceFeed contract, just on EbtcFeed
• Auth cleanup #761 prevents authority address from being changed on all system contracts except governor.
• make liquidatorRewardShares to uint128 #762 cap liquidator reward shares at uin128 to free up one storage slot (when combined with removal of CdpIds array)
• Feat: eBTC Chainlink oracle adapter #763 Chainlink adapter to combine ETH/USD and BTC/USD feeds to ETH/BTC
• Feat/governance wireup v2 #767 some governance changes, see PR
• exact general 17 spec #777 More precise properties around debt and collateral rounding behavior
• Feat/twap mastery #779 TWAP emergency switch in case of revert
• Feat/sequence liq inequality #780 Fix sequenceLiqToBatchLiq inequality to test recovery mode

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