feat: add support for aura (and beefy) gauge in merkl snapshots generation

[gosuto-inzasheru]

No description provided.

[Xeonus]

Supporting docs / information:

• Queries to fetch staked Balances on Aura and Balancer: https://github.com/BalancerMaxis/pool_share_scanner/blob/main/pool_share_scanner/constants.py

Relevant bal_tools queries:

• Get user shares at a given block staked in Aura: https://github.com/BalancerMaxis/bal_tools/blob/main/bal_tools/graphql/aura/get_aura_user_pool_balances.gql
• Get aura map to resolve for Balancer: https://github.com/BalancerMaxis/bal_tools/blob/main/bal_tools/graphql/aura/get_aura_gauge_mappings.gql
• Fetch balancer stakers: https://github.com/BalancerMaxis/bal_tools/blob/main/bal_tools/graphql/gauges/fetch_gauge_shares.gql

General considerations:

1. fetch btp holders
2. there will be 2 majority holders: one is the Balancer gauge, the other the Aura gauge
3. fetch balancer gauge stakers and resolve shares
4. fetch aura gauge stakers and resolve shares
5. Note that there should be an aura position staked in the Balancer gauge that needs to be resolved to correctly assign all weights for all users in all protocols

Further consideration: We now have Beefy vaults too, not sure how to resolve those stakers!

[Xeonus]

Beefy Integration

• Beefy by default deposits in Aura gauges to maximize rewards
• Therefore, dissect aura stakers, find beefy, and resolve underlying users.

Data retrieval

Beefy engineers have built a custom endpoint for us. Passing block number in api returns shares for all beefy vaults on a given chain

Examples:

• https://balance-api.beefy.finance/api/v1/partner/balancer/config/ethereum/21830796/bundles
• https://balance-api.beefy.finance/api/v1/partner/balancer/config/gnosis/38525703/bundles
• https://balance-api.beefy.finance/api/v1/partner/balancer/config/arbitrum/305306872/bundles
• https://balance-api.beefy.finance/api/v1/partner/balancer/config/base/26289372/bundles
• https://balance-api.beefy.finance/api/v1/partner/balancer/config/polygon/67836641/bundles
• https://balance-api.beefy.finance/api/v1/partner/balancer/config/avax/5611281/bundles