b25e9c0b-67e4-4324-ba06-7afd4c7adb62IMD JOB

`artifacts/answer.json` is written and `check-answer.mjs` prints `ok`. The average sale price was **11996174999642857 wei**, about 0.012 ETH. - **Result:** 28 qualifying sales summed to 335892899990000000 wei, and the mean rounded down gives the answer. - **Scan:** I pulled 12,232 `OrderFulfilled` logs from both Seaport contracts over exactly blocks 26019452 to 26026608 and decoded them myself, because `scan.mjs` does not decode Seaport events. The scratch script is in `test/scratch/` and is not delivered. - **Pin check:** The chain id and closing block hash matched the pin on publicnode, and the hash also matched on `rpc.mevblocker.io`. - **Rules applied:** - Listing fills count only if every consideration item is ETH or WETH. - Bid fills use the offer amount. - Fills with any other NFT or paid in another token are excluded. - **Recipe:** The brief marks this as a panel question, so the checker only accepts a `panel` recipe with a URL source. I gave the publicnode endpoint with the log filter and put the full method in `notes`. Nothing on the deployer's side can rerun this recipe; the panel's agreement is the evidence. The file is untracked, as required.

Created `artifacts/answer.json`. Average: **11,996,174,999,642,857 wei** across **28 sales**. The included reproduction code returned the same result, and the required checker printed `ok`.

check-answer.mjs prints `ok`. I computed the average sale price (28 qualifying sales, sum 335892899990000000 wei) independently confirmed on two RPC operators (publicnode and mevblocker) against the pinned block hash, and wrote `artifacts/answer.json` with the answer `11996174999642857` wei, definitions, and the panel-shaped recipe required by this panel-evidence request.

Created [artifacts/answer.json](/root/.identitymd/work/b25e9c0b-67e4-4324-ba06-7afd4c7adb62/af132f3b-8dd9-4a46-9997-c3842101886c/artifacts/answer.json). Average sale price: `11996174999642857` wei. Validation passed: `check-answer.mjs` printed `ok`.

I'll start by reading the task inputs.Now let me read the oracle-assess skill and scripts.I've read the brief and the check scripts. Key points: - Chain 1, blocks 26019452–26026608, pinned closing hash `0x8427…fbf3f` - Compute average sale price of collection `0x0b024b3d4ad38bff1acd303cd308d2c49c936e0a` from Seaport `OrderFulfilled` events (Seaport 1.5 + 1.6), per the detailed definitions in `oracle.json` - `evidence: "panel"` — so `check-answer.mjs` will require a `{kind: "panel", source}` recipe - Deliverable: only `artifacts/answer.json`; I can scaffold in `test/scratch/` Let me check the environment and connectivity first.Network and Node 22 are available. Now I'll write a scratch compute script that fetches `OrderFulfilled` logs from both Seaport contracts over the pinned window, decodes them per the brief's definitions, and prints only aggregates.Topic confirmed: `0x9d9af8e3…6f31`. Now the compute script.Let me clean up the convoluted listing check, then run it against a public endpoint.Pin confirmed and 12,232 logs fetched. One log has too-short data — I'll guard against malformed/short data and count skips.Still a decode failure — a log whose declared offsets exceed its data. Let me wrap decode in try/catch, count failures, and print one sample to inspect.Found it — `orderHash` is a non-indexed parameter, so data has 4 head words (orderHash, recipient, offerOffset, consOffset), not 3. Fixing the decode.Decode works now. Just a BigInt/Number mix on the final division.It computed — sales exist. Let me see the summary head of the output.Result: 28 qualifying sales, sum 335892899990000000 wei, floor-average **11996174999642857** wei. Now let me sanity-check: (1) dump decoded items for one sale tx to verify the decode, (2) cross-check the log count on a second endpoint (different operator) to rule out silent truncation.Verification looks solid: - **Pin confirmed** on both endpoints (`publicnode`, `flashbots`), and both return the same count: **12,232** `OrderFulfilled` logs — no silent truncation. - Spot-check of tx `0x2d11…c77a65` confirms the decode: one log is a bid fill (offer = 0.0115 WETH → price = offer amount, fees carved from it) and a second log in the same tx is a listing fill of the same token id (price = 0.010235 WETH consideration). Each event is a separate fill, as the definitions require. Result: 28 qualifying sales, sum = `335892899990000000` wei, floor-mean = **`11996174999642857`** wei. Since `evidence` is `"panel"`, `check-answer.mjs` requires a `{kind: "panel", source}` recipe — I'll name the public RPC endpoint as the source URL and put the full computation in `notes`.Done. `artifacts/answer.json` is written and `check-answer.mjs` prints **ok**. **Answer: `11996174999642857` wei** (~0.012 ETH) — the average sale price of Motocat Racing Club on OpenSea over blocks 26019452–26026608. How it was computed: - `eth_getLogs` for `OrderFulfilled` (`0x9d9af8e3…6f31`) on Seaport 1.5 and 1.6 over the pinned inclusive window from `ethereum-rpc.publicnode.com` → 12,232 logs. - Cross-checked on `rpc.flashbots.net/fast`: identical count, chain id 1, and pinned closing hash `0x8427…fbf3f` confirmed on both. - Decoded each event's `offer`/`consideration` arrays and applied the brief's definitions exactly: exactly one NFT item (itemType 2, the collection contract) across offer+consideration; listing fills price = sum of all ETH/WETH consideration amounts; bid fills price = the ETH/WETH offer amount. - 28 qualifying sales (mix of listings and bids, incl. multiple fills in one tx), total `335892899990000000` wei, floor-mean `11996174999642857` wei. The recipe is `{kind: "panel", source}` as required for this `evidence: "panel"` brief, with the public RPC endpoint named as the source; the full method is in `notes` and the open definitional points (what counts as an NFT item, per-log fills, inclusive range) are under `definitions`.

Created [artifacts/answer.json](/Users/peterhucik/.identitymd/work/b25e9c0b-67e4-4324-ba06-7afd4c7adb62/af132f3b-8dd9-4a46-9997-c3842101886c/artifacts/answer.json). Average sale price: `11996174999642857` wei. Required checker result: `ok`.

I wrote `artifacts/answer.json` with an average sale price of **11996174999642857 wei**, and `check-answer.mjs` prints `ok` for it. - **Sales:** 28 qualifying sales in blocks 26019452 to 26026608, totalling 335892899990000000 wei, which is the `figure`. Dividing by 28 and rounding down gives the answer above. - **Data:** I pulled 12,232 `OrderFulfilled` logs from both Seaport contracts and decoded them myself. I applied the request's definitions for what counts as a sale and how the price is taken. - **Pin:** `eth_chainId` returned 1 and the closing block hash matched the pin. Both checks were on the same endpoint I read from, `https://ethereum-rpc.publicnode.com`. I did not check the hash on a second operator's endpoint. - **Scan method:** I used my own script in `test/scratch/` rather than `scan.mjs`, because `scan.mjs` only sums or ranks a single field and cannot decode the nested offer and consideration arrays. That script is not part of the submission, so `notes` describes the method rather than giving a command to rerun. - **Recipe:** The brief says `"evidence": "panel"`, so the recipe is the `panel` kind with that endpoint as its `source`. Its parameters (`address`, `event`, `sumArg`) can't express the per-item filtering this question needs. The deployer therefore has no automatic rerun to match against and relies on panel agreement. - **Check failure:** The first check run failed because `window` must list `toBlock` before `fromBlock`. I reordered the keys and it passed.

Implemented `artifacts/answer.json` with the computed uint256 answer: `11996174999642857` Validation passed: `node .imd/reads/skills/oracle-assess/scripts/check-answer.mjs artifacts/answer.json .imd/reads/oracle.json` -> `ok` I also cross-checked the scan on two public RPC endpoints; both produced 28 qualifying sales and the same summed price.

Created `artifacts/answer.json` with the average **11,996,174,999,642,857 wei**, based on 28 qualifying sales, and reproduction instructions. The required checker printed `ok`.

The average sale price of Motocat Racing Club over blocks 26019452–26026608 was **11996174999642857 wei** (about 0.012 ETH), from 28 qualifying sales. The answer is in `artifacts/answer.json`, and `check-answer.mjs` prints `ok` for it. - **How I computed it:** The provided `scan.mjs` can't decode Seaport events, so I wrote a small decoder in `test/scratch/`. It pulled all 12232 `OrderFulfilled` logs from Seaport 1.5 and 1.6 over exactly the pinned blocks, using `ethereum-rpc.publicnode.com`, and applied the brief's definitions. - **Checks:** The chain id was 1 and the closing block's hash matched the pin on publicnode and again on `rpc.mevblocker.io`. The logs run from the first pinned block to the last. - **Sales:** 12 were listing fills and 16 were bid fills. No fill was dropped as a bundle or for being paid in another token, and no zero-price fill was counted. Total paid was 335892899990000000 wei; divided by 28 and rounded down, that gives the answer. **Recipe:** This question is marked as panel evidence, so the checker only accepts the `panel` recipe, which records a source instead of a computation to rerun. I named the RPC endpoint and the exact log query as the source. Nothing will automatically reproduce the result from it; the check is that the other panel members arrive at the same figure. The definitions, including that several bid fills in one transaction each count as a separate sale, are written into the file. Nothing was committed.

I wrote `artifacts/answer.json` with an average sale price of **11996174999642857 wei**, and `check-answer.mjs` prints `ok` for it. - **Count:** 28 sales qualified, out of 12,232 OrderFulfilled logs on the two Seaport contracts, with a total of 335892899990000000 wei. The average is that total divided by 28, rounded down. - **Window:** I scanned exactly blocks 26019452 to 26026608. The closing block hash from the endpoint matches the pinned one. - **Scan method:** I did not use `scan.mjs`. It sums a single log field and can't apply the sale and price definitions, so I wrote my own decoder for the offer and consideration arrays (kept in `test/scratch/`, not submitted). - **Recipe:** the brief's evidence is `panel`, and the reference allows only the `panel` recipe in that case. So the recipe is `panel` with `https://ethereum-rpc.publicnode.com` as its source. That recipe cannot be rerun to reproduce the figure; the actual computation is described in `notes`. - **Endpoint:** the whole scan ran on that one endpoint. I did not check the closing hash on a second operator's endpoint.

Created [artifacts/answer.json](artifacts/answer.json) with the reproduction procedure. Average: **11,996,174,999,642,857 wei** across **28 sales**. Validation: `check-answer.mjs` printed `ok`.

Created [artifacts/answer.json](artifacts/answer.json) with the reproducible calculation. Average: **11,996,174,999,642,857 wei** across **28 sales**. The required checker printed `ok`.

Created [artifacts/answer.json](/home/imd3/.identitymd/work/b25e9c0b-67e4-4324-ba06-7afd4c7adb62/af132f3b-8dd9-4a46-9997-c3842101886c/artifacts/answer.json) with the reproducible calculation. Average: **11996174999642857 wei** across **28 sales**. Reproduction checks passed; required validator printed `ok`.

Completed [artifacts/answer.json](/home/imd-worker/.identitymd/work/b25e9c0b-67e4-4324-ba06-7afd4c7adb62/af132f3b-8dd9-4a46-9997-c3842101886c/artifacts/answer.json). Average sale price: `11996174999642857` wei. Validation: `check-answer.mjs` prints `ok`.

Created [artifacts/answer.json](/Users/zhuminquan/.identitymd-2/work/b25e9c0b-67e4-4324-ba06-7afd4c7adb62/af132f3b-8dd9-4a46-9997-c3842101886c/artifacts/answer.json) with the computed average sale price: `11996174999642857` wei. The required checker returns `ok`.

I wrote `artifacts/answer.json`, and `check-answer.mjs` prints `ok` for it. The average sale price is **11996174999642857 wei**, from 28 qualifying sales summing to 335892899990000000 wei. - **Scan:** I fetched every Seaport 1.5 and 1.6 `OrderFulfilled` log over blocks 26019452 to 26026608. That was 12,232 logs, with no duplicates and none outside the window. The scan used `https://ethereum-rpc.publicnode.com`. - **Qualifying sales:** 12 were listing fills and 16 were bid fills. Each has exactly one NFT item overall, an ERC-721 of the collection. A listing counts only if every consideration item is ETH or WETH. A bid counts at its single ETH or WETH offer amount. - **Pinned hash:** `eth_chainId` is 1 and the closing block hash matches the pin. I checked the hash on `rpc.flashbots.net/fast` as well as publicnode. - **Scripts:** I decoded the logs with my own script in `test/scratch/sales.mjs` rather than `scan.mjs`. That script only sums a single data word, so it can't apply the definitions. The script isn't submitted. - **Recipe:** The brief is marked `"evidence": "panel"`, so the checker only accepts a `panel` recipe. The source is the publicnode URL, and the full method is in `notes` and `definitions`. Because a panel recipe isn't rerun, reproducing the answer relies on those notes.

Done. `artifacts/answer.json` is written and untracked; `check-answer.mjs` prints `ok`. **Answer: 11996174999642857 wei** (≈0.011996 ETH), the floor of 335892899990000000 wei over 28 sales. How it was computed: - Pin confirmed first: `eth_chainId` = 1 and block 26026608 = `0x84272223…fbf3f` on two independent operators (Flashbots, MEV Blocker). - Every qualifying sale must move the token, so the collection's 50 ERC-721 `Transfer` logs over blocks 26019452–26026608 bound the candidate set with no loss → 25 transactions. Decoded every `OrderFulfilled` from Seaport 1.5/1.6 in those receipts: 28 events, all 28 qualifying, all from Seaport 1.6. - Price per the brief's rules: 12 listing fills priced as the full consideration (fees included), 16 bid fills priced as the offer amount. Range 0.0083–0.0162 ETH. - Decode cross-checks: item-type histogram is 33 native / 49 ERC-20 / 28 ERC-721 — no ERC-1155, no bundle, no second NFT, so nothing was excluded by the definitions; and each event's token id also appears as a `Transfer` topic3 in the same transaction (0 mismatches), which is what breaks first if dynamic-array offsets are misread. The full computation reran identically on the second operator. Two things worth flagging: - The brief sets `"evidence": "panel"`, so the recipe is `{kind: "panel", source}` — required by the checker and also the only honest fit: `log-sum` adds one fixed data word, while Seaport carries the price in two variable-length dynamic arrays and names the collection in neither a topic nor a fixed word. The `source` is the exact reproducible chain query (endpoints, block range, both topic0s, both Seaport addresses), so it reruns from public RPC alone. - I had written in `notes` that none of the events came from Seaport 1.6; the per-contract count (verified on a third operator, publicnode) is the reverse — all 28 are 1.6. The file now says so. No figure changed. `test/scratch/` holds the scanner and the two cross-check scripts; nothing outside `artifacts/answer.json` was modified.

Done. `artifacts/answer.json` is written and `check-answer.mjs` prints `ok` (exit 0). ## Answer **11996174999642857 wei** (≈0.01199617 ETH) — the floor of the mean of **28 qualifying Seaport sales** totalling **335892899990000000 wei**. ## How it was computed 1. **Pin confirmed twice.** `eth_chainId` = 1 and block 26026608 hash matched `0x84272223…fbf3f` on `rpc.flashbots.net/fast` and again on `ethereum-rpc.publicnode.com` (different operator). The window is exactly 24h (1789916039→1790002439). 2. **Narrowed by the collection's own transfers.** 50 ERC-721 `Transfer` logs of `0x0b024b…6e0a` over exactly the pinned range, in 24 blocks / 25 txs. The delivered `scan.mjs` independently reported the same 50 logs and 24 blocks over 124 calls — no truncation. 3. **Narrowing is lossless.** `eth_call` at the closing block: name `Motocat Racing Club`, symbol `MCRC`, `supportsInterface(0x80ac58cd)` true, ERC-1155 false. A standard ERC-721 must emit `Transfer` on every Seaport fill, so no fill can exist outside those blocks. 4. **Decoded OrderFulfilled** on Seaport 1.5 + 1.6 in those txs: 28 events, **all 28 qualified** — zero dropped for a second NFT, ERC-1155, foreign collection, non-ETH/WETH payment, or multi-item offer. 12 listing fills (sum of consideration, fees included), 16 bid fills (offer amount). ## The one judgment call One trade (tx `0x2d11314b…7a65`, token 8617) was matched on chain and emitted **two** qualifying `OrderFulfilled` events — the bid side (0.0115 ETH) and the listing side (0.010235 ETH) — for a single NFT transfer. I counted both, because the brief's `sale` definition counts qualifying *events*, and collapsing them would require picking a side the brief never names. Stated explicitly under `definitions.sale_unit`, with the alternatives spelled out in `notes` (12014551851481481 keeping the listing side, 12061403703333333 keeping the bid side). ## Recipe kind The brief sets `"evidence": "panel"`, so the recipe is `{kind: "panel", source}` — which `check-answer.mjs` enforces. That's also the only honest fit: `OrderFulfilled` carries offer/consideration as dynamic ABI tuples, so the price isn't a fixed data word that `log-sum` could address, and a mean isn't a sum. `recipe.source` names the endpoint and the exact topic/address filter so the figure is rereadable from public RPC data alone. The file is untracked (`artifacts/` is in `.git/info/exclude`), nothing outside `artifacts/answer.json` and `test/scratch/` was touched.

**11996174999642857 wei** (≈0.011996 ETH) — mean of 28 qualifying Seaport `OrderFulfilled` fills, sum 335892899990000000 wei, over blocks 26019452–26026608. `node .imd/reads/skills/oracle-assess/scripts/check-answer.mjs artifacts/answer.json .imd/reads/oracle.json` prints `ok` (exit 0). One judgment call worth flagging: the brief defines a sale at the event level, and one transaction (`matchAdvancedOrders`) emits two `OrderFulfilled` legs for a single transfer of token 8617. I counted both, per the literal definition, and recorded the alternative (27 sales → 12061403703333333 wei) under `definitions.matchedOrders`.

Created [artifacts/answer.json](/home/imd-worker/.identitymd/work/b25e9c0b-67e4-4324-ba06-7afd4c7adb62/af132f3b-8dd9-4a46-9997-c3842101886c/artifacts/answer.json). Average sale price: `11996174999642857` wei. Validation result: `ok`.

Done. `artifacts/answer.json` is written and `check-answer.mjs` prints `ok`; the file is untracked as required (nothing to commit — I installed no dependencies). **Answer: 11996174999642857 wei** (~0.012 ETH average sale price). How it was computed, over exactly the pinned window (blocks 26019452–26026608, closing hash matching the pin): - The stock scan script can't decode OrderFulfilled's array-typed data, so I wrote a decoder in `test/scratch/avg.mjs` that fetches logs in 800-block chunks (halving on refusal) and prints only totals, never logs. - Scanned `eth_getLogs` on `https://rpc.flashbots.net/fast` for the OrderFulfilled topic on both Seaport 1.5 and 1.6: 12232 events total, with the endpoint's chain id and closing block hash verified against the pin first, and the pinned hash cross-checked on a second operator (publicnode). - Applied the brief's definitions: exactly one NFT item (itemType ≥ 2) across offer+consideration, and it must be itemType 2 of the Motocat contract. Listing fills summed every consideration amount, admitted only when all consideration items were native ETH or WETH; bid fills took the single ETH/WETH offer amount. **28 qualifying sales, sum 335892899990000000 wei, floor average 11996174999642857 wei.** No collection fill was excluded for a foreign token or bundle shape, and there were no decode errors. - Since the brief declares `"evidence": "panel"`, the recipe is `{kind: "panel", source: "https://rpc.flashbots.net/fast"}` (the only kind the checker accepts for a panel brief), with the full reproduction method — topic hash, decode layout, filter rules, and counts — in `notes`, and every interpretive choice (what counts as an NFT item, listing vs. bid fill shape, per-event counting) stated under `definitions`.

Created [artifacts/answer.json](/home/worker/.identitymd/work/b25e9c0b-67e4-4324-ba06-7afd4c7adb62/af132f3b-8dd9-4a46-9997-c3842101886c/artifacts/answer.json). Average sale price: `11996174999642857` wei. Validation passed: `check-answer.mjs` printed `ok`.

Done. `artifacts/answer.json` is written and `check-answer.mjs` prints `ok`. **Answer: 11996174999642857 wei** (≈0.011996 ETH), from **28 qualifying sales** summing **335892899990000000 wei**. How it was computed, over exactly blocks 26019452–26026608: 1. **Pin confirmed first** on two independent operators — `eth_chainId` = 1 and block 26026608 hash = `0x84272223…fbf3f` on `ethereum-rpc.publicnode.com` and `eth.drpc.org`. Window is 7157 blocks / 24.00 h. 2. **Prefilter:** all 50 `Transfer` logs of `0x0b024b…36e0a` in the window (all ERC-721), in 25 txs across 24 blocks. Any qualifying sale must move the NFT, so no sale can fall outside those txs. 3. **Seaport:** `OrderFulfilled` logs on Seaport 1.5 and 1.6 in those 24 blocks — 47 events, 28 of them in the collection's txs, all from Seaport 1.6. 4. **Decode + reduce:** all 28 hold exactly one itemType-2 item of the collection; 12 are listing fills (consideration entirely ETH/WETH, summed with fees), 16 are bid fills (single ETH/WETH offer amount). Nothing was excluded — no bundle, ERC-1155, or other-token fill. Floor of the mean = 11996174999642857. 5. **Re-run on `mainnet.gateway.tenderly.co`** (independent operator): identical 50 transfers, 28 sales, same sum and average. Two judgment calls the brief left open, both stated under `definitions`: - One tx (`0x2d11314b…`, block 26022645) is a Seaport **matched pair** — a bid fill at 0.0115 and a listing fill at 0.010235 for the same token 8617. The brief defines a sale as the *event*, so both were counted rather than merged. Deduplicating instead would give 12061403703333333 over 27 sales; I followed the brief's literal wording. - A **collection (criteria) offer** filled against several ids emits one event per id under one `orderHash`; each was counted as its own sale (six at 0.0108, two at 0.0084). Since the brief carries `"evidence": "panel"`, the recipe is the `panel` kind naming the endpoint and the exact logs read — the catalogue's `log-sum` cannot express decoding Seaport's offer/consideration arrays. Scratch work is in `test/scratch/` and nothing outside `artifacts/answer.json` was touched.

Both `artifacts/` and `test/` are already gitignored, so the files exist on disk but stay untracked, exactly as required. Task complete. `artifacts/answer.json` contains the computed average sale price of Motocat Racing Club over the pinned block window (26019452–26026608): **11,996,174,999,642,857 wei** (~0.012 ETH), from 28 qualifying Seaport OrderFulfilled sales totaling 335,892,899,990,000,000 wei. The brief's `evidence: "panel"` flag required packaging the recipe as `panel` (source = the RPC/log-scan method), even though the underlying computation was a full on-chain scan reproducible by the deployer. `check-answer.mjs` prints `ok`.

Created `artifacts/answer.json` with the reproduction procedure. Average: **11,996,174,999,642,857 wei** across **28 qualifying sales**. Required validator: `ok`.

Created [artifacts/answer.json](artifacts/answer.json) with the reproducible calculation. Average: **11,996,174,999,642,857 wei** across **28 sales**. Required checker returned `ok`.

Created [artifacts/answer.json](artifacts/answer.json) with the reproduction procedure. Average: **11996174999642857 wei** across **28 sales**. Required validator printed `ok`.

Created `artifacts/answer.json`: **11,996,174,999,642,857 wei**, averaged over 28 qualifying sales, with a reproducible RPC procedure. The required checker printed `ok`.

Created `artifacts/answer.json` with the reproducible calculation. Average: **11,996,174,999,642,857 wei** across **28 sales**. The required checker printed `ok`.

Done. `artifacts/answer.json` is written, the checker prints `ok`, and the file is left untracked (nothing staged or committed). **Answer: `11996174999642857` wei** (≈0.011996 ETH average) How it was computed, over exactly blocks 26019452–26026608 (closing hash confirmed against the pin on two operators): - `eth_getLogs` for the `OrderFulfilled` topic on Seaport 1.5 and 1.6 → 12,232 logs in the window (identical count from `rpc.flashbots.net/fast` and `ethereum-rpc.publicnode.com`, so no truncation). - ABI-decoded each log's offer/consideration arrays and applied the brief's definitions verbatim: exactly one ERC-721 (itemType 2) of `0x0b02…6e0a` and no other NFT; listing fills priced as the sum of consideration items (all must be ETH/WETH), bid fills priced as the single ETH/WETH offer amount. - 28 qualifying sales (12 listing fills, 16 bid fills, all on Seaport 1.6), sum 335892899990000000 wei, floor average 11996174999642857. Two things worth flagging: - The brief says `"evidence": "panel"`, so the recipe is `{kind:"panel", source:"https://rpc.flashbots.net/fast"}` — the checker rejects any chain recipe for a panel brief. The full reproduction procedure is in `notes`, and every open choice (no OpenSea zone/fee filter, `offer.length == 1` requirement, ETH+WETH added 1:1) is stated under `definitions`. - The bundled `scan.mjs` can't decode Seaport's nested dynamic arrays, so I wrote a small decoder in `test/scratch/avg.mjs` (reusing the scan script's `keccak256` export); it prints only totals.

Created `artifacts/answer.json`: **11996174999642857 wei**, averaged over 28 qualifying sales. The included reproduction script returned the same result. Required checker: `ok`.

I wrote `artifacts/answer.json`. The average sale price is **11996174999642857 wei**, and `check-answer.mjs` prints `ok` for the file. - **Sales counted:** 28 qualifying sales over blocks 26019452–26026608. The sum of their prices is 335892899990000000 wei, which is the `figure`. - **Log coverage:** I fetched all 12,232 `OrderFulfilled` logs from Seaport 1.5 and 1.6 for the window. There were no duplicate logs and no fills mixing the collection with other NFTs. - **Definitions applied:** they follow the brief. A listing fill counts only if every consideration item is ETH or WETH, and its price is their sum. A bid fill counts at its offer amount. - **Endpoints:** logs came from `https://ethereum-rpc.publicnode.com`. The chain id and closing block hash `0x8427…bf3f` matched there. The hash also matched on `https://rpc.flashbots.net/fast`, a different operator. - **Recipe kind:** the brief says `"evidence": "panel"`, and the checker rejects any other recipe kind for such a brief. The recipe is therefore `panel`, with the RPC endpoint and the log query as its source. It isn't a rerunnable chain recipe. The reproduction steps are in `notes`. - **Script not delivered:** I used a custom decoding script, which lives only in `test/scratch/run.mjs`. It is not part of the deliverable.