Greptile Summary

This PR adds support for Uniswap v4 PositionDescriptor and PositionManager contracts — including contract addresses for 16 networks, new ABI files, and ~30 read-only wrapper methods in Uniswap4. It also renames get_position_info to get_position_info_stateview and includes minor cleanup in util.py.

• Critical: pos_descriptor.abi is a proxy ABI — it contains no function definitions, so all 6 PositionDescriptor wrapper methods (get_currency_ratio_priority, get_flip_ratio, etc.) will fail at runtime. The implementation ABI is needed instead.
• Critical: get_pool_and_position_info passes the wrong argument — it feeds positionLiquidity(token_id).call() (a liquidity value) into getPoolAndPositionInfo(...) instead of passing token_id directly, and is also missing .call() on the outer invocation.
• Critical: get_position_liquidity calls positionLiquidity but the ABI defines the function as getPositionLiquidity — this will raise an ABI lookup error.
• Critical: get_next_token_id calls nonces(token_id) instead of the correct nextTokenId() (which takes no arguments per the ABI).
• Bug: Avalanche address has a tab character in _position_descriptor_contract_addresses_v4, which will cause _str_to_addr to fail on the avalanche network.

Confidence Score: 1/5

• This PR has multiple runtime-breaking bugs that will cause failures across all new PositionDescriptor and several PositionManager methods.
• Score of 1 reflects that the PositionDescriptor ABI is entirely wrong (proxy instead of implementation), at least 3 PositionManager methods call non-existent or wrong contract functions, and one contract address has a tab character. None of the new PositionDescriptor methods or several PositionManager methods will work at runtime.
• uniswap/assets/uniswap-v4/pos_descriptor.abi (wrong ABI entirely), uniswap/uniswap4.py (multiple function name mismatches and logic errors), uniswap/constants.py (tab character in avalanche address)

Important Files Changed

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[Uniswap4.__init__] --> B[Load contract addresses from constants.py]
    B --> C[_str_to_addr for each address]
    C --> D[_load_contract with ABI]
    D --> E[quoter / router / stateview / permit2]
    D --> F[position_descriptor\npos_descriptor.abi]
    D --> G[pool_manager\npoolmanager.abi]
    D --> H[position_manager\npos_manager.abi]

    F -->|"❌ Proxy ABI - no functions"| I[get_currency_ratio_priority\nget_flip_ratio\nget_native_currency_label\nget_pool_manager\nget_token_uri\nget_wrapped_native_address]
    
    H --> J[get_position_liquidity]
    J -->|"❌ calls positionLiquidity\nABI has getPositionLiquidity"| K[Runtime Error]

    H --> L[get_pool_and_position_info]
    L -->|"❌ passes liquidity value\ninstead of token_id"| K

    H --> M[get_next_token_id]
    M -->|"❌ calls nonces\ninstead of nextTokenId"| K

    H --> N[get_balance_of / get_approved\nget_owner_of / get_nonces\nget_name / get_symbol / ...]
    N -->|"✅ Correct"| O[Success]

_{Last reviewed commit: feee9d1}