# \[BIP-29\] Introduce GaugeAdder v2

**URL:** <https://forum.balancer.fi/t/bip-29-introduce-gaugeadder-v2/3490>\
**Category:** General Proposal\
**Created:** [July 21, 2022, 3:53pm UTC](https://forum.balancer.fi/t/bip-29-introduce-gaugeadder-v2/3490 "2022-07-21T15:53:12Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![solarcurve](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.balancer.fi/solarcurve/32/1487_2.png) [@solarcurve](https://forum.balancer.fi/u/solarcurve)\
**Post date:** [July 21, 2022, 3:53pm UTC](https://forum.balancer.fi/t/bip-29-introduce-gaugeadder-v2/3490/1 "2022-07-21T15:53:12Z")

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## Motivation

The [GaugeAdder](https://etherscan.io/address/0xEd5ba579bB5D516263ff6E1C10fcAc1040075Fe2) is a piece of veBAL infrastructure that securely streamlines the process of adding new gauges to the system. It includes checks that ensure only gauges deployed from the official gauge factories can be added to the veBAL system and become eligible for BAL emissions. As we prepare to add gauges from new networks the `GaugeAdder` must be upgraded to support this expansion. To facilitate this upgrade a coordinator contract has been deployed by the smart contracts team at Balancer Labs. The coordinator does the following:

- Grant permission to the Balancer Labs Ops Multisig (the one that triggers the weekly BAL minting and bridging every Thursday) to control the parameters of the Arbitrum and Optimism bridge, which are required to operate them (e.g. their gas limit)
- It creates a new gauge type called ‘Optimism’ on the `GaugeController`
- It revokes permission to add gauges from the old `GaugeAdder`
- It grants permission to add gauges to the `GaugeAdder v2` and grants permission to the LM Multisig `0xc38c5f97B34E175FFd35407fc91a937300E33860` (controlled by Balancer Maxis) to add governance approved Ethereum, Polygon, Arbitrum, and Optimism gauges.
- It ports the old Ethereum, Polygon, and Arbitrum gauge factories from the old `GaugeAdder` to the new one and adds the new Optimism gauge factory

The `GaugeAdder v2` also has support for zksync and gnosis gauges but those types are not yet created nor do gauge factories exist.

## Specification

If approved, the DAO Multisig `0x10A19e7eE7d7F8a52822f6817de8ea18204F2e4f` will initiate a transaction to interact with the Authorizer `0xA331D84eC860Bf466b4CdCcFb4aC09a1B43F3aE6` calling `grantRole` with the following arguments:

role: `0x0000000000000000000000000000000000000000000000000000000000000000`

address: `0x1B57f637Ce3408f1f834b0b70f9A595b062DAea7`

This can be verified [here](https://github.com/balancer-labs/balancer-v2-monorepo/blob/b61121f4d8188a783153ec9d94554e2fb5708d56/pkg/deployments/tasks/scripts/20220721-gauge-adder-migration-coordinator/output/mainnet.json#L2).

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<div class="post-metadata">

**Author:** ![solarcurve](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.balancer.fi/solarcurve/32/1487_2.png) [@solarcurve](https://forum.balancer.fi/u/solarcurve)\
**Post date:** [July 21, 2022, 5:12pm UTC](https://forum.balancer.fi/t/bip-29-introduce-gaugeadder-v2/3490/2 "2022-07-21T17:12:27Z")

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[https://snapshot.org/#/balancer.eth/proposal/0xe1e42fd73a2d734d78a65e514a6996c785e90bc82a2e896825dd4af003aeec15](https://snapshot.org/#/balancer.eth/proposal/0xe1e42fd73a2d734d78a65e514a6996c785e90bc82a2e896825dd4af003aeec15)