Add Prop-4

[jtriley2p]

Add Proposal 4

This adds infrastructure and actions to enable fees on Celo, BNB Chain, and Polygon.

Celo

Celo actions consist of transitioning ownership of the protocol from Wormhole to the Optimism bridge. Peripheral infrastructure already belongs to the Optimism bridge, so this action only transitions ownership of the core contracts toward the Optimism bridge and associated periphery.

BNB Chain and Polygon

For both BNB Chain and Polygon, we will use the Wormhole Native Token Transfer system for our fee infrastructure, so we must run a number of prerequisite scripts across BNB Chain, Polygon, and Ethereum to ensure the UNI token can move from Ethereum to BNB Chain and/or Polygon.

On BNB Chain in particular, governance operates through the Wormhole bridge and the fee infrastructure will operate through the Wormhole bridge via the Wormhole Native Token Transfer system.

On Polygon in particular, governance operates through the native Polygon bridge (FxRoot/FxChild) and the fee infrastructure will operate through the Wormhole bridge via the Wormhole Native Token Transfer system. The reason for this separation of Polygon bridge for governance and Wormhole bridge for fee infrastructure is to reduce the scope of fee infrastructure development (Polygon bridge fee infrastructure in parallel with Wormhole bridge fee infrastructure would be too complex for this one PR/proposal).

Notable Files & Directories

• Documentation:
  • script/proposal-4/Index.md: Deep dive into actions, context, and systems employed in the new proposal
• Scripts:
  • script/proposal-4/deploys/*: Prerequisite actions to be run before the proposal
  • script/proposal-4/ActivateL2sProposal.s.sol: Proposal script
• Contracts:
  • src/releasers/WormholeReleaser.sol: New Wormhole fee releaser system.
  • src/wormhole/SyntheticNttUni.sol: UNI token for Wormhole Native Token Transfer