aa196fff-5da2-4ac7-9e22-370272273f74IMD JOB

Created [artifacts/answer.json](artifacts/answer.json). Average: **82,150,000,000,000,000 wei** across **9 sales**. Included reproduction code independently returned the same result. Required validator printed `ok`.

Created `artifacts/answer.json` with the average: **82,150,000,000,000,000 wei** across 9 qualifying sales. Included reproduction code, verified it against the fetched logs, and ran the required checker: `ok`.

Created [artifacts/answer.json](/home/imd-worker/.identitymd/work/aa196fff-5da2-4ac7-9e22-370272273f74/30fcb1cc-f430-4f8a-a396-6e31bd2f74bc/artifacts/answer.json). Result: `82150000000000000` wei Qualifying sales: 9 Validation: `check-answer.mjs` prints `ok`.

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FAILURE: runtime_error

failed to start git: spawn git ENOENT

FAILURE: internal_error

Created [artifacts/answer.json](artifacts/answer.json) with the reproducible calculation. Average: **82150000000000000 wei** across **9 sales**. The supplied checker prints `ok`; embedded reproduction matches the fetched logs.

I'll start by checking the environment and confirming what's in the workspace.Clean workspace with Node 22. First, let me get the OrderFulfilled event topic via the scan script's keccak helper, and verify the pinned block hash on a public endpoint.Topic0 matches the known OrderFulfilled hash. Now I'll write a scratch scanner that fetches those logs from both Seaport contracts over the pinned range and decodes them per the definitions.One fix needed: a single getLogs over the whole 7157-block range risks silent truncation. I'll chunk it explicitly upfront.Now let me run the scan.All 12k logs fetched but every decode failed — my decoder has a bug. Let me print the first decode error to see what's wrong.Decoder walks off the end — the data layout must differ from my assumption. Let me inspect the head words of one log to see the actual offsets.Let me add log caching so I don't refetch on each debug iteration.Found it — the failing logs have only 3 topics, meaning `recipient` isn't indexed; the address sits in the data. My decoder assumed 3 indexed params. Let me verify the topics distribution across all cached logs.All logs have 3 topics — only 2 params are indexed. The data layout is: `orderHash | address | offerOffset | considerationOffset | arrays`. Fixing the decoder.All 12,232 logs decoded: 9 qualifying sales, average 82,150,000,000,000,000 wei (~0.082 ETH — plausible for this collection). Let me look at the near-misses to confirm the filters behave per the definitions.9 qualifying sales, no near-misses, sum 739350000000000000 → floor avg = 82150000000000000 wei. Per the reference, let me cheaply confirm the pinned hash on a second operator's endpoint.Wrong hex. Let me compute it properly.Pin confirmed on a second operator. Now writing the answer — the brief has `"evidence": "panel"`, so the recipe must be `panel` with the source URL.Done. `check-answer.mjs` prints `ok`. **Result:** average VeeFriends Series 2 sale price over blocks 26019452–26026608 = **82,150,000,000,000,000 wei** (~0.0822 ETH). How it was computed: - Fetched all `OrderFulfilled` logs (topic `0x9d9af8e3…f6f31`) from Seaport 1.5 and 1.6 over the exact pinned range, in 500-block chunks, from `rpc.flashbots.net/fast` — chainId 1 and the pinned closing hash verified, cross-checked on `ethereum-rpc.publicnode.com`. - 12,232 logs decoded (note: these logs carry only 3 topics — `recipient` is non-indexed, so data is `orderHash | recipient | offer[] | consideration[]`). - Applied the brief's definitions: 9 qualifying single-ERC-721 fills of the collection paid purely in ETH/WETH; zero near-misses (no bundles, no other-token fills). - Sum 739,350,000,000,000,000 / 9 = 82,150,000,000,000,000 exactly. One thing worth flagging: the brief pins `"evidence": "panel"`, so `check-answer.mjs` requires a `panel` recipe — `{ kind: "panel", source: "https://rpc.flashbots.net/fast" }` — even though the value is pure chain data. The decode assumptions I had to fix (NFT = itemTypes 2–5; listing vs. bid fill shapes) are stated under `definitions` in `artifacts/answer.json`.

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FAILURE: runtime_error

Check passes. `artifacts/answer.json` is written: average sale price of VeeFriends Series 2 over the pinned window is **82,150,000,000,000,000 wei** (0.08215 ETH), computed from 9 qualifying Seaport `OrderFulfilled` sales (sum 739,350,000,000,000,000 wei), verified against the pinned closing block hash on two independent public RPC endpoints.

Created [artifacts/answer.json](artifacts/answer.json) with the average **82,150,000,000,000,000 wei** across 9 qualifying sales and a reproducible RPC procedure. The required validator printed `ok`.

`artifacts/answer.json` is written and `check-answer.mjs` prints `ok`. The average sale price of VeeFriends Series 2 over blocks 26019452–26026608 is **82150000000000000 wei** (0.08215 ETH). - **Sales:** 9 qualifying sales, all listing fills, summing to 739350000000000000 wei. The mean is exact, so rounding down changes nothing. - **How I computed it:** I decoded 12232 Seaport 1.5 and 1.6 `OrderFulfilled` logs from `https://ethereum-rpc.publicnode.com`, scanning the whole pinned range. The scan script has no Seaport decoder, so I used my own in `test/scratch/sales.mjs`. - **Exclusions:** No fills were excluded as bundles, ERC-1155 or other-token payments. There were no duplicate logs. - **Pin check:** The closing block hash `0x84272223…bf3f` matched the pin on publicnode and on `rpc.mevblocker.io`, a second operator. - **Recipe kind:** The brief says `"evidence": "panel"`, so the checker only accepts a `panel` recipe with a URL `source`. I named the endpoint and the Seaport `OrderFulfilled` topic and window as the source, and put the decoding steps in `notes`. That means the deployer cannot rerun it as a chain recipe; it would have to follow the notes. Nothing was committed or force-added.

Created [artifacts/answer.json](/home/imd-worker/.identitymd/work/aa196fff-5da2-4ac7-9e22-370272273f74/30fcb1cc-f430-4f8a-a396-6e31bd2f74bc/artifacts/answer.json). Computed average: `82150000000000000` wei (9 qualifying sales; total `739350000000000000` wei). Validation passed: `check-answer.mjs` printed `ok`.

Completed [artifacts/answer.json](/Users/peterhucik/.identitymd/work/aa196fff-5da2-4ac7-9e22-370272273f74/30fcb1cc-f430-4f8a-a396-6e31bd2f74bc/artifacts/answer.json). Average sale price: `82150000000000000` wei. Validation passed: `ok`.

`artifacts/answer.json` is written and passes the plane's check. **Answer: 82150000000000000 wei** (0.08215 ETH) — average over 9 qualifying Seaport fills, sum 739350000000000000 wei. How it was computed: - Confirmed `eth_chainId = 1` and block 26026608's hash against the pinned `toBlockHash` on two independent operators (publicnode, flashbots) before scanning. - Pass 1: all logs of `0x9378…1a18` over 26019452–26026608 in 500-block chunks → 247 logs in 113 blocks. Every ERC-721 movement emits a `Transfer`, so no Seaport fill of the collection can lie outside those blocks. - Pass 2: `OrderFulfilled` (`0x9d9af8e3…`) on Seaport 1.5 + 1.6 restricted to those blocks → 1289 events, decoded in-process with the Seaport ABI. 9 carry a collection NFT item; no bundles, no ERC-1155, none paid in another token. - Decoder cross-check: the two `fulfillAvailableAdvancedOrders` sweeps' consideration sums equal their transactions' ETH value exactly (0.164 and 0.3285 ETH). - Both endpoints returned identical counts and sums, so neither scan was truncated. `eth.drpc.org` refused `eth_getLogs` on this range on its free tier and is not the source. Two things worth flagging: - **The one judgement call**: tx `0xc8b394c750…` is a `matchAdvancedOrders` — one transfer of token 8159, two qualifying `OrderFulfilled` events (bid side 0.085, listing side 0.08415, the 1% gap being the fee on the bid order). The brief defines a sale *as the event* and gives price rules for both listing and bid fills with no matching rule, so both are counted. Deduplicating would require picking a side, which the brief doesn't specify; the alternatives (81900000000000000 / 81793750000000000) are stated in `notes` for readers. - `evidence: "panel"` in the brief forces `recipe.kind = "panel"`, so the recipe is the RPC source URL and method; the figure itself is still computed from chain logs as the definitions require. Node's `fetch` ignores the sandbox proxy env by default here — the scan only runs with `NODE_USE_ENV_PROXY=1`. That is the most likely cause of the previous attempt's `runtime_error`.

Created [artifacts/answer.json](/root/.identitymd/work/aa196fff-5da2-4ac7-9e22-370272273f74/30fcb1cc-f430-4f8a-a396-6e31bd2f74bc/artifacts/answer.json). Answer: `82150000000000000` wei. Validation passed: `check-answer.mjs` printed `ok`.

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FAILURE: runtime_error

`artifacts/answer.json` is written, untracked (excluded via `.git/info/exclude`), and `check-answer.mjs` prints `ok`. ## Answer **82150000000000000 wei** (0.08215 ETH) — average over 9 qualifying sales summing to 739350000000000000 wei. ## How it was computed Pin confirmed on two independent operators: `eth_chainId` = `0x1`, block 26026608 → `0x84272223…fbf3f` on `rpc.flashbots.net/fast` and `ethereum-rpc.publicnode.com`. Two independent paths, exact agreement: 1. **Direct scan** — `eth_getLogs` for the `OrderFulfilled` topic on Seaport 1.5 + 1.6 over exactly 26019452–26026608 (256-block chunks, halving on refusal): 12,232 events decoded with the Seaport ABI, filtered by the brief's definitions → 9 sales. 2. **Candidate-transaction cross-check** — 120 collection `Transfer` logs (verified via the delivered `scan.mjs`, `pinned: true`) in 116 transactions; each receipt's Seaport logs decoded the same way → same 9 sales, same prices. 7 listing fills, 2 bid fills, all on Seaport 1.6. Prices 0.0777–0.085 ETH; the mean divides exactly, so rounding down isn't load-bearing. ## The one open judgement call, stated in `definitions` Tx `0xc8b394c7…e7cd` fills token 8159 through `matchAdvancedOrders`, emitting **two** qualifying events — bid side (0.085 WETH offered) and listing side (0.005568 + 0.078583 = 0.08415 WETH). The brief defines a sale *as the event* and gives bid fills their own pricing rule, so both are counted. Deduplicating to one economic trade would give 8 sales and 81775000000000000 wei instead; `notes` records that alternative explicitly so a disagreeing panel group is legible. ## On the recipe kind The brief carries `"evidence": "panel"`, so the recipe is `{kind: "panel", source}` — the check enforces this. That is also the only honest fit: `log-sum` adds one fixed data word, while a Seaport price is a sum over a dynamic `ReceivedItem[]` whose qualification depends on per-item `itemType` and `token`. The `source` names the endpoint, topic0, both Seaport addresses and the exact block range, so it can be re-read.

Created [artifacts/answer.json](artifacts/answer.json) with **82,150,000,000,000,000 wei**, averaged across 9 qualifying sales, plus definitions and reproduction code. Independent calculation matched; the required validator printed `ok`.

Done. The answer is **82150000000000000 wei (0.08215 ETH)** — the average of 9 qualifying VeeFriends Series 2 sales on OpenSea over the pinned window, and `check-answer.mjs` prints `ok` for `artifacts/answer.json`. How it was computed: - **Scan**: `eth_getLogs` for the Seaport `OrderFulfilled` topic on both pinned contracts (Seaport 1.5 and 1.6) over exactly blocks 26019452–26026608 via `https://rpc.flashbots.net/fast`. The closing block hash matched the pin there and, as a one-call cross-check, on `ethereum-rpc.publicnode.com` (my first cross-check call failed only because I hand-hexed the block number wrong; the corrected call agreed exactly). The stock scan script can't decode Seaport's dynamic offer/consideration arrays, so I wrote a small decoder in `test/scratch/avg.mjs` that keeps all 12,232 logs in-process and prints only totals. - **Filter per the brief's definitions**: exactly one NFT item (itemType 2, the VeeFriends contract) across offer+consideration and no other NFT. That yielded 7 listing fills (price = sum of all consideration amounts, every consideration item ETH or WETH) and 2 bid fills (price = the single ETH/WETH offer amount). Nothing was excluded for a foreign payment token, and there were no decode errors. - **Average**: sum 739350000000000000 wei over 9 sales → floor = 82150000000000000, which happens to divide exactly. The deliverable `artifacts/answer.json` copies the request id, chain, and window verbatim from the brief (matching its key order, since the checker compares by `JSON.stringify`), uses the `panel` recipe kind the brief's `"evidence": "panel"` requires with the RPC endpoint as `source`, and states every choice the question left open under `definitions` (per-event counting for matchOrders, the no-other-NFT rule, the listing/bid fill shapes, and the floor average). The file is untracked as required, and nothing outside `artifacts/` and `test/scratch/` was modified.

The average sale price is **82150000000000000 wei** (0.08215 ETH). `artifacts/answer.json` is written, and `check-answer.mjs` prints `ok` for it. I did not run `scan.mjs`, because it can't decode Seaport events. I wrote my own decoder and ran it once, in `test/scratch/sales.mjs`. - **Sales:** there were 9 qualifying sales in blocks 26019452 to 26026608. Their prices total 739350000000000000 wei, and 739350000000000000 / 9 rounds down to 82150000000000000. No OrderFulfilled event touching the collection was excluded. - **Scan:** I pulled 12,232 OrderFulfilled logs from both Seaport contracts across the whole range, with no duplicates. I decoded each one with the Seaport ABI and applied the request's definitions. - **Pin check:** the closing block hash matched the pin on `ethereum-rpc.publicnode.com`, which I scanned from. It also matched on `rpc.mevblocker.io/fast`. - **Recipe kind:** the request has `"evidence": "panel"`, and the answer checker only accepts a `panel` recipe for that. The catalogue has no chain recipe that fits this reduction. The recipe's `source` therefore points at the RPC endpoint and the logs I read. It is not something the deployer can rerun as a chain recipe. - **Definitions:** `artifacts/answer.json` states the sale, price, average and window definitions, and `notes` records the endpoints used. The file is untracked and not committed.

Created `artifacts/answer.json` with **82,150,000,000,000,000 wei**, averaged across 9 qualifying sales, and a reproducible RPC script. Required validator printed `ok`.

I wrote `artifacts/answer.json`. The average sale price is **82150000000000000 wei** (0.08215 ETH), and `check-answer.mjs` prints `ok`. - **Figures:** 9 sales qualified. Together they paid 739350000000000000 wei, which is the `figure`. Rounding the mean down gives the answer. - **Scan:** I pulled Seaport 1.5 and 1.6 `OrderFulfilled` logs over blocks 26019452 to 26026608 from `https://ethereum-rpc.publicnode.com` and got 12,232 logs. The chain id was 1, and block 26026608 matched the pinned hash. I decoded the logs myself because `scan.mjs` doesn't decode Seaport's item arrays. I read the endpoint's response as complete; I did not run a second scan or check the hash on a second operator. - **Exclusions:** No qualifying sale was dropped for being paid in a different token. - **Recipe kind:** The brief says `"evidence": "panel"`, and the checker rejects any recipe other than `panel` for that, so the recipe is `panel` with the RPC endpoint and log filter as its `source`. The scan method and per-sale prices are in `notes`, but the deployer can't rerun a `panel` recipe.

Created [artifacts/answer.json](/home/imd-worker/.identitymd/work/aa196fff-5da2-4ac7-9e22-370272273f74/30fcb1cc-f430-4f8a-a396-6e31bd2f74bc/artifacts/answer.json). Average sale price: `82150000000000000` wei. Validation passed: `check-answer.mjs` printed `ok`.

Created `artifacts/answer.json`: **82,150,000,000,000,000 wei**, averaged over 9 qualifying sales. Includes reproduction code. Independent arithmetic check matched; the required validator printed `ok`.

Created `artifacts/answer.json` with the RPC reproduction procedure. Average: **82,150,000,000,000,000 wei** across **9 sales**. Required validator printed `ok`.

**82150000000000000 wei** (0.08215 ETH) — mean of 9 qualifying Seaport `OrderFulfilled` fills (sum 739350000000000000 wei), computed over blocks 26019452–26026608 with the pinned hash confirmed on three public endpoints. `node .imd/reads/skills/oracle-assess/scripts/check-answer.mjs artifacts/answer.json .imd/reads/oracle.json` prints `ok`.

Created [artifacts/answer.json](/home/imd/.identitymd/work/aa196fff-5da2-4ac7-9e22-370272273f74/30fcb1cc-f430-4f8a-a396-6e31bd2f74bc/artifacts/answer.json). Computed average: `82150000000000000` wei across 9 qualifying sales. Validator result: `ok`.

Created `artifacts/answer.json`. Average: **82,150,000,000,000,000 wei** across **9 sales**. Embedded reproduction code returned the same result; the required validator printed `ok`.

The average sale price over the pinned window was **82150000000000000 wei (0.08215 ETH)**. It's written to `artifacts/answer.json`, and `check-answer.mjs` prints `ok`. **How I got it:** - I fetched every Seaport 1.5 and 1.6 `OrderFulfilled` log over exactly blocks 26019452–26026608. That was 12,232 logs. - I decoded them with the Seaport ABI and applied the brief's definitions. - 9 events involve the collection, and all 9 qualify: - 7 are listing fills. Every payment in them was ETH or WETH, and the price includes fees. - 2 are bid fills, where the price is the WETH offer amount. - The prices add up to 739350000000000000 wei. Divided by 9 that is exactly 82150000000000000, so rounding down changes nothing. - A second full scan on a different provider found the same 12,232 logs and the same answer. The chain id and the closing block hash matched the brief on three providers. **One choice to review:** token #8159 shows up twice in block 26022445, once as a listing fill and once as a bid fill. This is probably one matched trade that produced two events. The brief counts every qualifying event, so I counted both. If they were treated as one sale, the average would change. I recorded this under `definitions.counting`. The brief marks this as a panel-evidence question, so the recipe is `kind: "panel"`. Its `source` names the exact `eth_getLogs` query I ran. The script I used lives in `test/scratch/`, which is not submitted; the notes list how the scan was run and every individual price. The previous attempt failed only because the model was at capacity, so there was nothing in it to fix. `artifacts/answer.json` is left untracked as required.

I wrote `artifacts/answer.json` with an average sale price of **82150000000000000 wei** (0.08215 ETH), and `check-answer.mjs` prints `ok`. - **Scan:** I read every Seaport 1.5 and 1.6 `OrderFulfilled` log over exactly blocks 26019452–26026608, 12232 logs in all. The endpoint was `https://ethereum-rpc.publicnode.com`, in 500-block chunks. It reported chain id 1 and the pinned closing hash `0x84272223…bf3f`. - **Result:** 9 fills qualified under the request's definitions. They sum to 739350000000000000 wei, and dividing by 9 and rounding down gives the answer. - **Scan tool:** I decoded the logs with my own script (`test/scratch/s.mjs`) rather than `scan.mjs`. `scan.mjs` only reads top-level log fields and can't decode the nested offer and consideration arrays. That scratch script isn't submitted. - **Recipe kind:** The brief says `"evidence": "panel"`, so the recipe kind is `panel`, with the endpoint and log filter named as the source. - **Cross-check:** I did not check the closing hash on a second endpoint, and I ran only the one scan. - **Fix during checking:** The check script rejected my first draft because the `window` keys were in the wrong order. I reordered them to match `oracle.json`.

The answer is **82150000000000000 wei (0.08215 ETH)**. It's in `artifacts/answer.json`, and `check-answer.mjs` prints `ok` for it. **How I got it** - The provided `scan.mjs` can't decode Seaport's nested item arrays, so I wrote a small Node script in `test/scratch/seaport.mjs`. It pulls the `OrderFulfilled` logs from both Seaport addresses (1.5 and 1.6) over exactly blocks 26019452–26026608, in 1000-block chunks that halve if an endpoint refuses. It then applies the request's definitions of a sale and a price. - On `ethereum-rpc.publicnode.com`, chain id 1 and the pinned closing block hash both matched. That endpoint refused some chunks because it wants a token for archive requests; the script retried those on `rpc.flashbots.net/fast` (nodereal was the next fallback). Every chunk was eventually fetched, so the scan is complete, but it came from more than one endpoint. - Out of 12232 `OrderFulfilled` logs, 9 were qualifying VeeFriends Series 2 sales, and none were dropped as bundles or for being paid in another token: - 6 listing fills paid in ETH - 1 listing fill paid in WETH - 2 bid fills paid in WETH - The prices add up to 739350000000000000 wei. Divided by 9 that comes out exactly, so rounding down changed nothing. **Choices to be aware of** - **Recipe kind:** the request is marked `"evidence": "panel"`, and the checker rejects any other recipe kind for such requests. So the recipe is `panel`, with the RPC URL, the event signature, the two contracts and the block range as its `source`. Nobody reruns a panel recipe; the answer stands or falls on whether other panel members agree. - **Definitions:** I copied the request's definitions into the answer and spelled out two points it left open. "Any other NFT" means Seaport item types 2–5, and ETH and WETH count 1:1 in wei. - **Not checked:** I didn't confirm the closing hash on a second, independent endpoint, and I didn't run a second full scan. `artifacts/answer.json` is the only file I wrote outside `test/scratch/`. It's left uncommitted, as the task asks.

Created [artifacts/answer.json](artifacts/answer.json). Average: **82,150,000,000,000,000 wei** across 9 qualifying sales. Included definitions and reproduction procedure. Validator printed `ok`.

Selected model is at capacity. Please try a different model.

FAILURE: runtime_error

I wrote `artifacts/answer.json`, and `check-answer.mjs` prints `ok` for it. The average sale price is **82150000000000000 wei** (0.08215 ETH). That is 739350000000000000 wei summed over 9 qualifying sales. - **Window:** I confirmed block 26026608 has the pinned hash on the publicnode RPC. I did not cross-check the hash on a second endpoint. - **Method:** I did not use `scan.mjs`. Seaport emits far too many `OrderFulfilled` logs across all collections to pull for the whole window. Instead I found the blocks where the collection emitted `Transfer` logs (106 blocks). I fetched `OrderFulfilled` from both Seaport contracts in only those blocks and decoded them myself. Any Seaport fill of a collection token also emits a `Transfer` in its block, so this should miss nothing, but that is my reasoning rather than a second scan. - **Definitions applied:** - A sale has exactly one NFT across offer and consideration, and it is an ERC-721 of the collection. - A listing fill counts only if every consideration item is ETH or WETH, and the price is their sum. - A bid fill counts only if its single offer item is ETH or WETH, and the price is that offer amount. - **Recipe:** The brief says `"evidence": "panel"`, so the recipe kind is `panel`, with the publicnode RPC URL as its source. The definitions and the method are spelled out in `definitions` and `notes`. The scratch script is `test/scratch/s.mjs`; it is not part of the submission.

`artifacts/answer.json` is written and `check-answer.mjs` prints `ok`. The average sale price is **82150000000000000 wei** (0.08215 ETH). - **Figure:** 9 qualifying sales sum to 739350000000000000 wei, and that divides by 9 exactly, so there is no rounding. - **Sales:** they sit in blocks 26019918 (1), 26020639 (2), 26021194 (4) and 26022445 (2). Prices run from 0.0777 to 0.085 ETH. - **Exclusions:** no bundles, ERC-1155 fills or non-ETH/WETH payments turned up among the logs touching the collection. - **Recipe kind:** the brief says `"evidence": "panel"`, and the checker only accepts a `panel` recipe for that. The figure is still fully on-chain, and `notes` in the answer file says how to reproduce it. - **Method:** I fetched the collection's ERC-721 `Transfer` logs over the window (120 logs in 106 blocks). I then fetched Seaport 1.5 and 1.6 `OrderFulfilled` logs for only those blocks (382 logs) and decoded them from the ABI. Any qualifying sale has to move the token, so it emits a `Transfer` in the same block, and skipping the other blocks loses nothing. `scan.mjs` can't decode Seaport's item arrays, so I used a custom script in `test/scratch/`, which isn't delivered. - **Endpoints:** logs came mainly from `ethereum-rpc.publicnode.com`. Chain id 1 and the pinned closing hash checked out on publicnode, flashbots, mevblocker and valve.city. I did not run a second full scan.

Completed `artifacts/answer.json`. Computed result: `82150000000000000` wei. Verification run: `node .imd/reads/skills/oracle-assess/scripts/check-answer.mjs artifacts/answer.json .imd/reads/oracle.json` Output: `ok`

Created `artifacts/answer.json` with average **82,150,000,000,000,000 wei** across 9 sales and reproduction code. The supplied checker prints `ok`.

Created `artifacts/answer.json` with average **82150000000000000 wei** across 9 qualifying sales and a reproducible RPC computation. The required validator printed `ok`.

Created `artifacts/answer.json` with **82150000000000000 wei**, averaged over 9 qualifying sales, and a reproducible RPC procedure. The required validator printed `ok`.

Created [artifacts/answer.json](/home/worker/.identitymd/work/aa196fff-5da2-4ac7-9e22-370272273f74/30fcb1cc-f430-4f8a-a396-6e31bd2f74bc/artifacts/answer.json). Average sale price: `82150000000000000` wei. Validation passed: `check-answer.mjs` printed `ok`.

`artifacts/answer.json` is written and `check-answer.mjs` prints **ok**. **Answer: 82150000000000000 wei** (0.08215 ETH average), figure/sum 739350000000000000 over 9 sales. How it was computed, over exactly blocks 26019452–26026608: 1. **Pin confirmed** on two independent operators (flashbots, publicnode): chain id `0x1`, block 26026608 hash `0x84272223…fbf3f`. 2. **Candidate blocks**: ERC-721 `Transfer` logs on `0x9378…1a18` — 120 logs in 106 blocks. Every Seaport ERC-721 fill moves the token in the same block, so this prefilter is lossless and avoids pulling ~24h of all-Seaport logs. 3. **Seaport logs**: `OrderFulfilled` (topic0 `0x9d9af8e3…`) on Seaport 1.5 and 1.6 restricted to those blocks — 546 events, 9 touching the collection. 4. **Decoded** offer/consideration arrays and applied the brief's rules. All 9 qualified: 7 listing fills (sum of all-ETH/WETH consideration, fees included), 2 bid fills (the offer amount). None excluded for a bundle, ERC-1155, or a non-ETH/WETH token. 739350000000000000 / 9 divides exactly. Verified by running the whole scan twice, on `ethereum-rpc.publicnode.com` and `one.valve.city` (different operators) — identical sales, sum and average, which rules out a silently truncated log range. Two things worth your attention, both stated in `definitions`: - **Recipe kind is `panel`**, as the brief's `"evidence": "panel"` requires (the checker enforces it). No chain recipe in the catalogue can express this figure — `log-sum` sums one fixed data word, while this needs itemType/token selection inside two dynamic arrays and a division. The recipe's `source` names the endpoint, topic and contracts, and `notes` carries the full procedure. - **One judgement call**: tx `0xc8b394…ae7cd` (block 26022445, token 8159) is a matched-order pair — one economic trade emitting two qualifying `OrderFulfilled` events (bid 0.085, listing 0.08415). The brief defines a sale as the event, so both are counted. Deduplicating to one trade would give 8 sales and 81900000000000000 wei; that alternative is recorded in `definitions` and `notes` so a disagreeing panel group is legible. `artifacts/answer.json` is left untracked; `test/scratch/veefriends.mjs` holds the scan script.