Multiple Quote Tokens support for FXPools: FXPoolDeployerTracker

[andreiashu]

Description

End of last year we added support for FXPoolDeployer ( #527 ) which basically acts as a factory contract for FXPools: allows permissionless deployments of FXPool contracts. It has a 1:1 relationship with the quote token (eg. USDC) - ie. one FXPoolDeployer contract per quote token.

This PR adds the ability for our UI to track multiple FXPoolDeployer contracts through the subgraph, as we gradually add support for more quote tokens.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Dependency changes
• Code refactor / cleanup
• Documentation or wording changes
• Other

How should this be tested?

We've deployed the changes over to our balancer subgraph polygon clone (trimmed down version, starting from block 49368321 ): https://thegraph.com/hosted-service/subgraph/xave-finance/balancer-v2-polygon

Simply run the "Query FXPools" from the query dropdown and it should return:

• SBC / USDC.e: created with the previous/existing FXPoolDeployer contract that has USDC.e as quote token (tx)
• XSGD / USDC : created with a new FXPoolDeployer contract that has USDC native as quote token (tx)

Checklist:

• I have performed a self-review of my own code
• I have requested at least 1 review (If the PR is significant enough, use best judgement here)
• I have commented my code where relevant, particularly in hard-to-understand areas

dev -> master

• I have checked that all beta deployments have synced
• I have checked that the earliest block in the polygon pruned deployment is block, date/time
  • The earliest block is more than 24 hours old
• I have checked that core metrics are the same in the beta and production deployments

Merges to dev

• I have checked that the graft base is not a pruned deployment

[mendesfabio]

It's looking good. I'm merging to staging-dev so we can update grafting params before merging to dev and starting the sync. Thank you!