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@tbrent tbrent released this 30 May 19:38
3.2.0-rc1
07f6f59
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GPG key ID: B5690EEEBB952194
Learn about vigilant mode.

This release makes bidding in dutch auctions easier for MEV searchers and gives new RTokens being deployed the option to enable a variable target basket, or to be "reweightable". An RToken that is not reweightable cannot have its target basket changed in terms of quantities of target units.

Upgrade Steps

Upgrade BasketHandler, BackingManager, and Distributor.

Call broker.setDutchTradeImplementation(newGnosisTrade) with the new DutchTrade contract address.

If this is the first upgrade to a >= 3.0.0 token, call *.cacheComponents() on all components.

For plugins, upgrade all plugins that contain an appreciating asset (not FiatCollateral. AppreciatingFiatCollateral etc) OR contain multiple oracle feeds.

Core Protocol Contracts

New governance param added: reweightable

  • BackingManager
    • Track basket nonce last collateralized at end of settleTrade()
  • BasketHandler [+1 slot]
    • Restrict redeemCustom() to nonces after lastCollateralized
    • New LastCollateralizedChanged() event -- track to determine earliest basket nonce to use for redeemCustom()
    • Add concept of a reweightable basket: a basket that can have its target amounts (once grouped by target unit) changed
    • Add reweightable() view
    • Add forceSetPrimeBasket() to allow setting a new prime basket without normalizing by USD value
    • Alter setPrimeBasket() to enforce basket normalization for reweightable RTokens
  • BackingManager
    • Minor gas optimization
  • Deployer
    • New boolean field reweightable added to IDeployer.DeploymentParams
  • Distributor
    • Minor gas optimization

Plugins

Assets

  • frax-eth: Add new sFrxETH plugin that leverages a curve EMA
  • stargate: Continue transfers of wrapper tokens if stargate rewards break
  • All plugins with variable refPerTok(): do not revert refresh() when underlying protocol reverts
  • All plugins with multiple chainlink feeds will now timeout over the maximum of the feeds' timeouts
  • Add ORACLE_TIMEOUT_BUFFER to all usages of chainlink feeds

Facades

  • FacadeRead
    • Use avg prices instead of low prices in backingOverview() and basketBreakdown()

Trading

  • DutchTrade

    • Add new bidTradeCallback() function to allow payment of tokens at the end of the tx, removing need for flash loans. Example of how-to-use in contracts/plugins/mocks/DutchTradeRouter.sol

    Facades

    • FacadeRead
      • Add maxIssuableByAmounts() function to provide an estimation independent of account balances
Assets 2
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