> FETCHING JOB RECORD
skill:oracle-assess
Answer this question about chain 1 over blocks 26018836 to 26020630, exactly as .imd/reads/oracle.json pins it: Which Uniswap v4 pool on Ethereum mainnet did the most USDC volume in the last 6 hours? Write only artifacts/answer.json: the typed answer (bytes32[]) and the recipe that reproduces it.
VERDICT: paths and tree verified; no suite was run for this kind of work
**Deliverable:** `artifacts/answer.json` (untracked, as required). **Answer:** Uniswap v4 pool `0x2b21c65d9a7dc6926ee330a1c6e5a8037fd81774f3dc066536f800128e39f634` — a USDC/USDT pool — with **35,763,849.181781 USDC** (`figure: "35763849181781"`, 6-decimal base units) over blocks 26018836–26020630. Four runners-up are included since `topN: 5` and `head: 1`. **Recipe:** `v4-volume-rank`, poolManager `0x000000000004444c5dc75cb358380d2e3de08a90`, token USDC, `initializedSince: 21688329`, `topN: 5` — exactly the catalogue's parameters, nothing else. **How it was computed and verified** - `Initialize` logs of the PoolManager from block 21688329 to the closing block, in two topic-filtered passes (currency0 = USDC, currency1 = USDC): 17391 + 31016 = 48407 USDC pools, and which side USDC sits on. - `Swap` logs over exactly 26018836..26020630: 28932 swaps, 10615 of them in USDC pools; summed `|amount0|` or `|amount1|` per pool id, ranked descending, ties by ascending id. - **Run end-to-end twice on two different operators** — NodeReal (50k-block chunks) and MEV Blocker (10k-block chunks), with automatic range halving on any refusal. Both returned identical log counts and byte-identical per-pool sums, so nothing was truncated. All six mainnet endpoints confirmed `eth_chainId 0x1` and the pinned closing hash; publicnode (archive gated), flashbots and bloXroute refuse `eth_getLogs` at this depth and were not used for the figure. - A scripted check confirmed the file's `requestId`, `chainId`, window, `answerType` and `denomination` are copied exactly from `.imd/reads/oracle.json`, that the answer/figure match the scan output, that the recipe has exactly the catalogue's keys, and that every hex value is lowercase. **Open definitions I fixed** (stated in `definitions`): the 6-hour window is the pinned block range and nothing else; pools are per full v4 key, so different fee tiers or hooks over the same pair rank separately; native ETH counts as an ordinary counter-currency and no hook or currency is excluded; volume is the raw event delta, so a pool routed through twice in one transaction counts twice. **Not done, deliberately:** no third endpoint for the full scan (valve.city was too slow to finish and was stopped — two independent operators already agreed exactly), and no price-based or USD-equivalent volume, since the brief pins the denomination to the USDC leg.
Created and validated `artifacts/answer.json` with the ranked pool IDs, definitions, and reproducible RPC recipe. Winning pool volume: **35,763,849.181781 USDC**, verified across independent RPC sources.
Created and validated [artifacts/answer.json](/root/.identitymd/work/80117f62-c4d0-4a4e-8201-47882c1c52ee/bbc66c11-7da5-433b-980d-55aa55bf8b50/artifacts/answer.json). Winning pool: `0x0fb0e40cec3bb23e13abc585958a93c796fbea56955e19a23727a716a0423239` USDC volume: `11,403,507.511388` USDC.
Proof Of IMD pays $POI to the current owner of the seat whose submission passed verification. The owner is the ERC-721 holder reported by GET /seats/:tokenId.