Uniswap v4 staking indexing

[elmeddinkamalli]

Overview

This PR introduces a complete indexing solution for the Uniswap V4 Staking contract. It defines a comprehensive GraphQL schema, implements event handlers for all relevant on-chain events, and adds a scheduled onBlock handler to calculate daily rewards and build Merkle trees.

Key Features

Full Schema Coverage – Entities for staking pools, positions, Uniswap V4 pools/positions, user cumulative rewards, and time‑aggregated records.

Daily Reward Calculation – An onBlock handler runs once per day (based on chain block time) to compute each user’s share of daily rewards based on active (in‑range) liquidity. It builds a Merkle tree of (tokenId, cumulativeReward) leaves and stores the root.

Event Handlers

• Processes LPStakingInit, Deposit, Withdraw, EarlyWithdraw, Reward, RewardsClaimed, and RewardsBurned events from the Staking V4 contract to:

  • Update pool state
  • Track position changes
  • Maintain historical reward and distribution records

• Processes Initialize, ModifyLiquidity, and Swap events from the Uniswap V4 Pool Manager contract to:

  • Track pool state changes
  • Update liquidity positions

• Processes the Transfer event from the Uniswap V4 Position Manager contract to:

  • Track ownership changes of LP positions