{
  "v": 1,
  "requestId": "04e4e296-4061-4e83-afa8-7194cb2f91ff",
  "chainId": 1,
  "window": {
    "toBlock": 26048185,
    "fromBlock": 26047887,
    "toBlockHash": "0x4e56a6dcfef3265a8874b5ee86b0b5e6df4d4bc3cc666e5c442c89638985d5c7"
  },
  "answerType": "uint256",
  "answer": "1000000",
  "figure": "1000000",
  "definitions": {
    "subject": "Bitcoin's consensus block size limit before SegWit; the Ethereum chain and pinned window only timestamp this historical question.",
    "maximumBlockSize": "Maximum total serialized Bitcoin block size under the pre-SegWit rule, not a maximum observed block in the pinned Ethereum window.",
    "unit": "Bytes; 1 MB here means 1,000,000 bytes in decimal units."
  },
  "recipe": {
    "kind": "panel",
    "source": "https://github.com/bitcoin/bips/blob/master/bip-0141.mediawiki"
  },
  "notes": "Read BIP 141, 'Other consensus critical limits' / 'Block size': it states that blocks were limited to 1,000,000 bytes total size before changing the rule to block weight. Bitcoin Core's capacity-increases FAQ independently states the same 1,000,000-byte limit (https://bitcoin.org/en/bitcoin-core/capacity-increases-faq). This is a historical Bitcoin fact, so no value is reduced from Ethereum RPC data; the exact Ethereum window is copied from the request as its timestamp anchor."
}