Stake mBPT in mStable's Staked Token BPT (stkBPT) into Balancer's new mBPT Gauge

[naddison36]

This is the implementation of RPF Stake BPT staked in mStable into Balancer Staking contracts on the mStable Forum.

Details are documented in MCCP 21.

[naddison36]

The PR for this change is #350

The governance vote is https://snapshot.org/#/mstablegovernance.eth/proposal/0x18331093de8b4a50ba41374c3d7fa1b6832057c0d14d0b86d05cd42fa1b63f20

[naddison36]

Deployment plan:

• Deploy new StakedTokenBPT contract using the StakedToken.deploy hardhat task
• Propose proxy upgrade of StakedTokenBPT to newly deployed contract with data calling the initialize function.
  • Raise Protocol DAO tx
  • Execute tx after 4 sigs
• Execute fork tests against the proposed upgrade
• Request Etherscan tag for new contract

Tuesday, 10 May

• Claim remaining BAL using old mechanism
• Approve proposed proxy upgrade
  • Raise Protocol DAO tx
  • Execute tx after 4 sigs
• Execute fork tests
• Merge PR #350
• Release a new version of the contracts
  • git tag
  • Github Release https://github.com/mstable/mStable-contracts/releases
  • Publish to npm @mstable/protocol
• Protocol DAO call StakedTokenBPT.setBalRecipient
• Request Dune Analytics decode of upgraded StakedTokenBPT
• Import ABI to the Ethereum Signature Database https://www.4byte.directory/import-abi/
• Update developer docs
  • Add Balancer mBPT Gauge to contract diagram https://developers.mstable.org/
  • Update stkBPT ABI https://developers.mstable.org/contracts/governance/stkbpt

[naddison36]

New StabkedTokenBPT implementation deployed to 0xc63a48d85CCE7C3bD4d18db9c0972a4D223e4193

New Mainnet tx https://gnosis-safe.io/app/eth:0xF6FF1F7FCEB2cE6d26687EaaB5988b445d0b94a2/transactions/queue
312. Propose upgraded of StakedTokenBPT proxy to use Balancer's new mBPT Guage

[naddison36]

Proposed proxy upgrade was done in https://etherscan.io/tx/0xa87fc987a4489a9dbab97f3b06ac522a2f804c6ff6341e4f034f05bdd366b0f4
at 2-May-2022 10:49:27 PM +UTC

The acceptance of the upgrade can be done from Tuesday, 10 May.

[naddison36]

New mainnet tx https://gnosis-safe.io/app/eth:0xF6FF1F7FCEB2cE6d26687EaaB5988b445d0b94a2/transactions/queue
319. Accept upgrade of StakedTokenBPT proxy so mBPT can be added to Balancer's new gauge contract and rewards collected

[naddison36]

I tested in a fork test that there is no more BAL to claim from the old StakedTokenBPT implementation

[naddison36]

The proxy has been upgraded

• tx https://etherscan.io/tx/0xd3d9b10c763b7a65f73e9b8c843ef7a084083b685a633b394f4fcd5e15aa190d
• 790,423 mBPT transferred to the gauge
• StakedTokenBPT now holds 70% of Balancer's mBPT gauge https://etherscan.io/token/0xbec2d02008dc64a6ad519471048cf3d3af5ca0c5#balances