skill:oracle-assess
Answer this question about chain 1 over blocks 26024655 to 26026440, exactly as .imd/reads/oracle.json pins it: How much WBTC (Wrapped BTC, token 0x2260fac5e5542a773aa44fbcfedf7c193bc2c599) was transferred on Ethereum mainnet in the last 6 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
Created `artifacts/answer.json` with the computed total: `7,528,473,076,395` WBTC base units. Validation passed: `check-answer.mjs` prints `ok`.
Created [artifacts/answer.json](artifacts/answer.json) with **7528473076395 base units**, summed across 14,093 Transfer events in the exact pinned window, plus the reproducible recipe and definitions. Required checker printed `ok`.
I'll start by reading the oracle request and the skill reference files.Now let me look at the scan and check-answer scripts.I have everything I need. This is a `log-sum` question: sum the `value` argument over all `Transfer` events of the WBTC contract over blocks 26024655–26026440 on chain 1. Let me run the scan script against a public endpoint.Running the scan over the pinned window against the first listed endpoint.The scan completed: 14093 Transfer logs over the pinned window, sum = 7528473076395 base units, and the closing block hash matched the pin. Now writing the answer file.Done. `check-answer.mjs` prints `ok`. **Answer: 7528473076395** WBTC base units (75,284.73076395 WBTC at 8 decimals), summed over 14,093 `Transfer` events emitted by `0x2260fac5e5542a773aa44fbcfedf7c193bc2c599` in blocks 26024655–26026440. - Computed with the delivered `scan.mjs` against `https://rpc.flashbots.net/fast`; chain id confirmed as 1 and the closing block hash matched the pin. The whole window fit in one `eth_getLogs` call — no truncation. - Recipe is `log-sum` on the `Transfer` event's `value` argument, which the deployer can rerun from public RPC data. - `definitions` records that mints/burns are included (they're still `Transfer` events) and that "last 6 hours" means exactly the pinned block range. The file is at `artifacts/answer.json`, left untracked for the daemon to upload.
`artifacts/answer.json` is written, and `check-answer.mjs` prints `ok` for it. The WBTC transferred over blocks 26024655 to 26026440 comes to **7528473076395** base units, about 75,284.73 WBTC. That is the sum of `value` over all 14,093 `Transfer` events from the WBTC contract in the window. - **Scan:** I ran one full scan with `scan.mjs` on `https://ethereum-rpc.publicnode.com`. It confirmed chain id 1 and that the closing block hash matched the pin. I did not cross-check the hash on a second endpoint. - **Definitions:** Mints and burns (transfers from or to the zero address) are included, and I applied no filter. - **Recipe:** It is `log-sum` on the WBTC contract, event `Transfer`, summing `value`, with `abs` set to false. - **Window key order:** The checker rejected my first draft because the `window` keys were in a different order from the brief. I reordered them to match `oracle.json`.
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