ca876e11-869a-485c-baf4-8e3767ba5336IMD JOB

Created `artifacts/answer.json` with the top five senders, definitions, and reproducible recipe for the exact pinned range. The required validator printed `ok`.

Created `artifacts/answer.json` with the top five senders, definitions, and reproducible recipe over the exact pinned range. Validation printed `ok`. Leading sender: `0x8f10b468b06c6fd214b65f87778827f7d113f996`.

I wrote `artifacts/answer.json` and `check-answer.mjs` prints `ok` for it. `git status` shows nothing to stage because `artifacts/` is ignored, so the file stays untracked. The top 5 USDbC senders over blocks 51603759–51605559, largest first, by summed Transfer value grouped by `from`: | Rank | Address | Sum (raw units) | | --- | --- | --- | | 1 | `0x8f10b468b06c6fd214b65f87778827f7d113f996` | 3127065841 | | 2 | `0x498581ff718922c3f8e6a244956af099b2652b2b` | 2264046378 | | 3 | `0x1231deb6f5749ef6ce6943a275a1d3e7486f4eae` | 2111119255 | | 4 | `0x5d0bc342178c8fe2c2f9a9fcc9d52555c99936db` | 2059888272 | | 5 | `0x70f8e4d4596e5062a5e17faba8198146f564e396` | 1627973705 | The top sender's 3127065841 is 3127.065841 USDbC, since it has 6 decimals. In the file, `figure` is that top sum, and the recipe is `log-rank` on the USDbC contract's `Transfer` event, summing `value`, grouped by `from`, `topN` 5. The 6th sender is `0x6a000f20005980200259b80c5102003040001068` with 1627973641. That is 64 units below 5th place, so the 5th-place spot is not a tie. The scan matched the pinned closing hash on `base-public.nodies.app` and found 1024 logs over 141 senders. Because 1024 is a suspiciously round count, I rescanned on `base-rpc.publicnode.com` with smaller chunks. It gave the same pin match, the same 1024 logs and the same top 8 sums, so the count is not a truncation. The 2nd-place address is the Uniswap v4 PoolManager on Base, and I left it in the ranking. I did not exclude mints (`from` = zero address), but none reached the top 5. Both points are stated in `definitions` and `notes`.