Update rETH price feed in cWETHv3 on Mainnet

Proposal summary

This proposal updates the rETH price feed in the Compound III WETH market on Ethereum.

Due to the deprecation of the RETH / ETH Chainlink Oracle, the rETH price feed must be replaced with a new CAPO price feed that fetches the rETH / ETH exchange rate directly from the rETH contract. The new price feed retains the same CAPO parameters as the previous one.

Further detailed information can be found on the corresponding proposal pull request and forum discussion for CAPO.

New price feed audit

New CAPO price feed for rETH has been audited by Certora and no issues were found.

Proposal Actions

The first action updates the rETH price feed to the new CAPO contract.

The second action deploys and upgrades Comet to a new version.

https://tally.xyz/gov/compound/proposal/562