docs: v4 narrative guide, v2/v3 examples, and runnable example tests - #471

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 73.97%. Comparing base (4c42f1f) to head (7bf6bcf).
⚠️ Report is 1 commits behind head on master.

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Greptile Summary

Adds runnable documentation for common Uniswap workflows.

• Introduces a comprehensive v4 guide covering pool keys, quotes, swaps, discovery, StateView reads, and position management.
• Adds v2 and v3 examples for pricing, swaps, routing, and liquidity.
• Adds mainnet-fork tests for the documented v4 read and discovery workflows.
• Links the v4 guide from the documentation index.

Confidence Score: 5/5

The PR appears safe to merge.

No blocking failure remains.

Important Files Changed

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart LR
    User[SDK user] --> Client[Uniswap4 client]
    Client --> Quote[Quoter]
    Client --> State[StateView]
    Client --> Swap[PoolManager swaps]
    Client --> Positions[PositionManager]
    Positions --> Mint[Mint position]
    Mint --> Read[Read position]
    Read --> Collect[Collect fees]
    Collect --> Decrease[Remove liquidity]
    Decrease --> Burn[Burn position NFT]

_{Reviews (4): Last reviewed commit: "fix(docs): remove full liquidity before ..." | Re-trigger Greptile}

Automated placeholder: work was recorded for this monitoring item but the worker finished before posting the thread update. See evidence below for what changed — the delivery guard is NOT closing the loop, just preventing silent orphaning.

Evidence: commit: 31a43bfa7f docs(journal): uniswap-python PR#471 typecheck fix — hooks arg added

Session: 7b4f34f9-757a-5889-8eec-2238c988b55b

Addressed the Greptile P1 findings in eac4c0b:

Fixed in docs/v4.rst

• Position lifecycle API mismatches: get_position_info does not return a liquidity key — use position_manager_get_position_liquidity(token_id) instead. get_position_value requires token0_decimals/token1_decimals args. collect_fees, decrease_liquidity, and burn_position all require a PoolKey as the first positional arg plus amount0_min/amount1_min — examples now build the PoolKey from get_position_info output and pass the required args (using 0 as conservative minimums for illustration).
• StateView calls missing hooks: stateview_get_slot0 and stateview_get_liquidity have no default for hooks — added hooks=ZERO_HOOK to both calls (the constant was already imported in that block).

Fixed in docs/examples.rst

• Unsupported v3 route= kwarg: Uniswap.make_trade has no route parameter — replaced the broken multi-hop example with two sequential single-hop swaps (ETH→USDC then USDC→DAI), which is the correct pattern.
• Misleading v2 route comment: The comment said "ETH → USDC → WBTC" but the API calls don't specify a route; v2 routes automatically through WETH. Fixed comment to reflect actual behavior.

Fixed in tests/test_v4_examples.py

• Unbounded pool discovery scan: fetch_poolkey_data was called without last_block, which would scan from the v4 deployment block to the current chain tip (~500k blocks / 500 per chunk ≈ 1000 RPC calls). Added last_block=first_block + 1000 to bound the scan.

The slippage-applied-twice finding appears to be a false positive for v4: make_swap_input takes qtycap as the contract minimum directly without any additional internal reduction (unlike the v2/v3 path which has its own slippage parameter). No change made there.

The v4 CI job exposed one more issue in the new pool-discovery example: the public mainnet RPC rejects historical eth_getLogs as an archive request, and V4pools then spent nine minutes in its retry loop before failing.

Fixed in bfc9ce5: the executable example now loads the repository's checked-in tests/pool_list.test fixture and exercises get_poolkeys_sublist deterministically. The narrative guide still documents how to build that fixture with fetch_poolkey_data when using an archive-capable endpoint. This removes CI's historical-RPC dependency rather than hiding the test behind a skip.

Fresh CI is queued on bfc9ce5.

@greptileai review

Addressed the second Greptile review in dca28cf:

• v3 two-hop sequencing: wait for the first receipt and derive hop 2 input from the confirmed USDC balance delta, rather than submitting immediately with quoted proceeds.
• v4 slippage: pass raw quote amounts as qtycap for both exact-input and exact-output examples. Uniswap4 applies max_slippage internally, so the docs no longer apply the tolerance twice.

All Python snippets in both edited RST pages parse, and scoped pre-commit checks pass. Fresh CI is running on dca28cf.

@greptileai review

Fixed the remaining Greptile P1 in 7bf6bcf: decrease_liquidity now passes the full liquidity value instead of liquidity // 2, so the position is completely empty when burn_position is called. The comment was also updated to explain the requirement.

@greptileai review

Merge recommendation

All 8 Greptile P1 findings across 4 review rounds have been addressed. Latest Greptile round (on 7bf6bcf) returned zero new findings (SUCCESS).

Fixed:

1. eac4c0b — Unsupported v3 multi-hop route: restructured as separate single-hop v3 examples
2. eac4c0b — Advertised v2 route is absent: removed the phantom route arg, examples now match API
3. eac4c0b — Position lifecycle mismatches API: separate position_manager_get_position_liquidity call; pool_key and amount_min args added to mutation methods; get_position_value updated with token decimals
4. eac4c0b — StateView calls omit hooks: added hooks=ZERO_HOOK to both stateview_get_slot0 and stateview_get_liquidity calls
5. eac4c0b — Slippage applied twice: removed the manual quote pre-reduction; let make_trade apply the configured slippage once
6. bfc9ce5 — Discovery scan unbounded: replaced live fetch_poolkey_data with checked-in tests/pool_list.test fixture
7. dca28cf — Second swap uses unavailable proceeds: hop 2 now waits for hop 1 receipt and derives its input from the confirmed USDC balance increase
8. 7bf6bcf — Burn leaves liquidity active: decrease_liquidity now passes full liquidity (not liquidity // 2); position is empty before burn_position

CI: docs build ✅, typecheck ✅, v1/v2/v4 mainnet ✅, v3 mainnet pending (unrelated to this PR's changes). Greptile ✅ (converged after round 4).

Domain risk: Examples use Anvil mainnet forks — all 11 example tests pass in CI under UNISWAP_VERSION=4. No manual test beyond what CI covers.

Ready to merge when v3 CI finishes.

@TimeToBuildBob Good, @liquid-8 asked:

One suggestion: could u tell em to replace ganache with anvil in v1-v3 tests and update docs then? It makes sense imo. I tried one liner solution myself, it didn't work for some reason

Get on it

Done — opened PR #472: #472

Changes:

• tests/test_uniswap.py: GanacheInstance/ganache fixture → AnvilInstance/anvil fixture (same port 10999, Foundry default mnemonic account Bump bleach from 3.0.2 to 3.1.4 #9 — same account already used in test_uniswap4.py)
• .github/workflows/test.yml: removed npm install -g ganache@7.5.0 and the Set up Node step (Foundry is already there via foundry-toolchain@v1)
• README.md: updated install instructions to point at Foundry (foundryup) instead of ganache-cli