[Pairs] TWAP price calculation implementation

[psparacino]

Pull Request Template

📄 Description

Calculating the new price based on the swap params results in price spikes when dust amount are involved. By using Uniswap's TWAP method: https://docs.uniswap.org/contracts/v2/concepts/core-concepts/oracles, essentially the average price of the last 10 minutes, the effects of any huge spikes are mitigated to a sane price range.

Included a new entity to track the necessary timestamp & previous cumulative prices params for TWAP.

dev deployment: https://api.studio.thegraph.com/query/28985/pairs-testing/version/latest

📝 Changelog

feat: use Uniswap TWAP pricing to calculate pairs prices

✅ Checklist

• Matchstick test included (if applicable).
• Version incremented in package.json of the applicable subgraph(s)
• All changes are reflected in the changelog of this PR for the applicable subgraph(s)
• If modifying polygon-digital-carbon or carbonmark subgraphs, MAKE SURE TO MODIFY subgraph.template.yaml (NOT subgraph.yaml DIRECTLY!)
  • If modifying subgraph.template.yaml, also make sure to run npm run prepare-matic locally and commit the resulting rendered subgraph.yaml

ℹ️ Additional Information