> FETCHING JOB RECORD
skill:oracle-assess
Answer this question about chain 8453 over blocks 51601956 to 51605556, exactly as .imd/reads/oracle.json pins it: How much cbBTC (Coinbase Wrapped BTC, token 0xcbb7c0000ab88b473b1f5afd9ef808440eed33bf) was transferred on Base in the last 2 hours, in base units with 8 decimals? Sum value over every Transfer event of that contract over the pinned window. Write only artifacts/answer.json: the typed answer (uint256) and the recipe that reproduces it.
VERDICT: paths and tree verified; no suite was run for this kind of work
The check prints `ok`, and `artifacts/answer.json` is left untracked (it shows nothing in `git status`, so it's ignored by the repo's rules — it isn't staged or committed, as required). ## Result **Answer: `681047056768`** cbBTC base units (8 decimals) — i.e. 6,810.47056768 cbBTC transferred on Base over blocks 51601956–51605556. **How it was computed** - One complete scan with the delivered `scan.mjs` on `https://base-public.nodies.app`, filtering `Transfer(address,address,uint256)` logs emitted by `0xcbb7c0000ab88b473b1f5afd9ef808440eed33bf` and summing the first data word (`value`). - The script confirmed `eth_chainId` = 8453 and that the closing block's hash matched the pin (`pinned: true`). 60,835 logs across 3,564 blocks; 151 chunks / 350 RPC calls, with the script halving ranges when the endpoint refused a size, so nothing was truncated. - The pinned closing hash and chain id were independently confirmed on a second operator (`base-rpc.publicnode.com`) with a single `eth_getBlockByNumber`. **What's in `artifacts/answer.json`** - `requestId`, `chainId`, `window` copied verbatim from the brief; `answerType: uint256`; `answer` and `figure` as decimal strings. - Recipe: `log-sum` with `address`, `event` (`event Transfer(address indexed from, address indexed to, uint256 value)`), `sumArg: "value"`, `abs: false` — exactly the catalogue's parameters, nothing extra. - `definitions` state the denomination (8-decimal base units), that mints/burns are included since the question says *every* Transfer event, and that "last 2 hours" is fixed to the pinned block range. - `notes` record the exact scan command, endpoints used, and the log/chunk counts. `node .imd/reads/skills/oracle-assess/scripts/check-answer.mjs artifacts/answer.json .imd/reads/oracle.json` → `ok` (exit 0). No other paths were touched.
Created `artifacts/answer.json` with **681047056768 base units**, summed across 60,835 Transfer events in the exact pinned window, plus reproducible recipe and definitions. Required validator printed `ok`.
`artifacts/answer.json` is written, and `check-answer.mjs` prints `ok` for it. The cbBTC transferred over blocks 51601956 to 51605556 is **681047056768** base units, which is 6810.47056768 cbBTC. - **Scan:** I ran `scan.mjs` once against `https://base-public.nodies.app` over exactly the pinned range. It confirmed chain 8453 and matched the closing block hash. It found 60,835 Transfer logs from the cbBTC contract. - **Cross-check:** I also confirmed the closing block hash on `https://base-rpc.publicnode.com`, a second operator. I did not run a second full scan. - **Recipe:** `log-sum` on the cbBTC address, the `Transfer` event, summing `value`, with `abs` false. The `notes` field records the exact scan command and both endpoints. - **Definitions stated:** The window is the pinned range inclusive. Mints and burns count like any other Transfer, and nothing is netted, so the figure is gross Transfer volume. - **Checker quirk:** It rejected my first draft because the `window` keys were in a different order from the brief's. I copied `window` straight from `oracle.json` and it passed. The scan's stdout and stderr files, which I had written to the repo root, are deleted, so `artifacts/answer.json` is the only file I created.
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FAILURE: runtime_error
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