[BIP-881] Enable Gauges for xusd/mevUSDC + xbtc/mevBTC Stable Pool (Avax), xusd/USDC Varlamore Growth Stable Pool (Arbitrum), xusd/vgUSDC Stable Pool (Mainnet); all with a 2% cap

PR with Payload

https://github.com/BalancerMaxis/multisig-ops/pull/2488

Summary:

Enable Balancer gauges with 2% caps for xusd/mevUSDC and xbtc/mevBTC Stable Pools on Avalanche, the xusd/vgUSDC Stable Pool on Arbitrum, and the xusd/vgUSDC Stable Pool (Mainnet)

xusd is fully backed by a basket of assets used in on-chain and centralized exchange strategies, and is issued by Stream Finance.

mevUSDC is a Silo Vault curated by MEV Capital.

mevBTC is a Silo Vault curated by MEV Capital.

vgUSDC is a Silo Vault curated by Varlamore.

The pool is a StableSurge pool. StableSurge pools are a type of stable pool designed for assets that usually trade at nearly the same value or have a predictable exchange rate. What makes StableSurge pools different is that they use a special feature, called a hook, to automatically adjust the swap fee based on how balanced the pool is during a trade.

References/Useful links:

Link to: • Website: https://app.streamprotocol.money/ • X: https://x.com/StreamDefi

Github: https://github.com/StreamDefi

Protocol Description:

Stream Finance is the issuer of xusd and xbtc, which are backed by assets used in yield generation through on-chain and centralized exchange strategies. Cross-chain support is handled via LayerZero OFTs.

Users can mint/redeem xusd and xbtc at exchange rate (1 xusd != 1 usdc) with a cooldown of up to 24h, depending on time of mint/redeem. Accrued yield increases the value of 1 xusd/xbtc overtime.

Motivation:

The role of the listed StableSurge pool is to increase the secondary market on-chain liquidity of xusd and xbtc, while connecting the Stream, Silo & MEV/Varlamore Capital ecosystems.

The capital efficiency of StableSurge pools is helping to bootstrap a liquidity network for xusd and xbtc.

By using StableSurge a comparably small amount of initial capital can provide a disproportionately deep market for xusd and xbtc.

Gauges:

xusd/vgUSDC Mainnet: 0xc13a3315806f097cee00e39c4285f5Bf250DD8a4

xusd/vgUSDC Arbitrum:

–> Child: https://arbiscan.io/address/0x892934813a7e31b9b9f4c1f120943f17c3bd5ed7

–> Root: https://etherscan.io/address/0x8c8722786aa9651b65425680642564a12e2dd854

xusd/mevUSDC Avax:

–> Child: https://snowscan.xyz/address/0x3ca285558531543798b7158c046034ed6388d58a

–> Root: https://etherscan.io/address/0x4f23ccc4349e9500d27c7096bd61d203f1d1c1aa

xbtc/mevBTC: –> Child: https://snowscan.xyz/address/0xec4f410cd8e04d52846a20e160d300d76a911fc7

–> Root: https://etherscan.io/address/0xc429d0602365f09a9257be3be14c94b83cbbbb37

Technical Specification

The Balancer Maxi Omni-Sig 0x9ff471F9f98F42E5151C7855fD1b5aa906b1AF7e will interact with the GaugeAdderv4 at 0x5DbAd78818D4c8958EfF2d5b95b28385A22113Cd and call the addGauge function with the following arguments: gauge(address):0xc13a3315806f097cee00e39c4285f5bf250dd8a4 gaugeType(string): Ethereum gauge(address):0x8c8722786aa9651b65425680642564a12e2dd854 gaugeType(string): Arbitrum gauge(address):0x4f23CCC4349E9500d27C7096bD61d203F1D1C1Aa gaugeType(string): Avalanche gauge(address):0xc429d0602365f09a9257be3be14c94b83cbbbb37 gaugeType(string): Avalanche