[BIP-683] Enable gauge for aGHO/USDe E-CLP [Arbitrum]

PR with Payload

https://github.com/BalancerMaxis/multisig-ops/pull/1268

Summary

This is a proposal to enable one uncapped Balancer gauge on Arbitrum for an aGHO/USDe E-CLP.

References/Useful links

• Documentation of E-CLPs
• Website
• Github
• Discord
• X

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Protocol description

• aGHO is the deposit receipt token issued by the Aave protocol to lenders of GHO. Since aTokens are rebasing, this pool uses BGD Labs’s statA wrapper that is a repricing representation of statA tokens that reflects the accruing lending yield. GHO is issued by Aave.
• USDe is a "delta-neutral synthetic dollar" issued by Ethena.

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Motivation

Gyroscope is launching further strategic pools.

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Specifications

Governance

The Gyroscope Protocol will be governed by a DAO and relevant stakeholder with the full launch on Ethereum. For now, the FTL Labs multi-sig can pause the pool, change the swap fee and set the protocol fee. As a custom pool by Gyroscope, the E-CLP will be controlled by Gyroscope governance upon its launch.

Oracles

• ‘rateProvider0’ for aGHO: 0x177862A0242acD8b5F9cc757a963c1C8883da45E and relevant review.
• ‘rateProvider1’ for USDe: 0x0000000000000000000000000000000000000000

Audits

Audit reports by Nethermind, Trail of Bits, and Runtime Verification can be accessed here (the E-CLP is called the “CEMM” in these reports). In addition, the E-CLP code has been live in production since November 2022.

Centralization vectors

No centralization vectors. The FTL Labs team’s multi-sig can - currently - pause the pool, change the swap fee and set the protocol fee.

Market History

• The Gyroscope Protocol is live on Ethereum since EOY23, with E-CLPs on several other chains. Details available here .
• This is the first aGHO/ USDe E-CLP.

Value

As per “Motivation”.

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Contracts

• E-CLP: 0x38161e9eFb8De52D00A1eB0f773223FD28FDd7c2
• Child gauge on Arbitrum: 0xcfab2efeF3aFfdd158568DC896115Eac26B3C498
• Arbitrum root gauge on Ethereum: 0xD558C611B69a223767788B638717E868D8947Fd0

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Specification

Transaction: The Balancer Maxi LM Multisig eth:0xc38c5f97B34E175FFd35407fc91a937300E33860 will interact with the gaugeAdderv4 at 0x5DbAd78818D4c8958EfF2d5b95b28385A22113Cd and call the addGauge function with the following arguments:

• gauge(address): 0xD558C611B69a223767788B638717E868D8947Fd0
• gaugeType(string): Arbitrum