{
  "v": 1,
  "requestId": "6a2d0538-1db8-44bc-a4be-954f5f8c6b15",
  "chainId": 1,
  "window": {
    "toBlock": 26049165,
    "fromBlock": 26048866,
    "toBlockHash": "0x20426a3e4b845b87cd43d6683e11e5637765c8319cd7126a02222ae16a8c65cd"
  },
  "answerType": "uint256",
  "answer": "194048",
  "figure": "194048",
  "definitions": {
    "answer": "The Ethereum mainnet beacon-chain epoch number at which the Shanghai/Capella (Shapella) upgrade activated, encoded as a base-10 uint256 string.",
    "source": "The Ethereum Foundation's ethereum.org fork timeline is the public source read for this historical protocol fact.",
    "missing": "The source explicitly supplies the epoch, so no missing-value handling is needed.",
    "subject": "This is a historical Ethereum protocol fact; the pinned execution-block window is retained exactly as the request's timestamp anchor and does not change the epoch."
  },
  "recipe": {
    "kind": "panel",
    "source": "https://ethereum.org/ethereum-forks/"
  },
  "notes": "Read the Shanghai-Capella (Shapella) entry in Ethereum Foundation's ethereum.org fork timeline, which states epoch number 194,048. Confirmed the requested chain is mainnet and the pinned closing hash at block 26049165 matches 0x20426a3e4b845b87cd43d6683e11e5637765c8319cd7126a02222ae16a8c65cd on https://rpc.flashbots.net/fast and https://ethereum-rpc.publicnode.com. This panel-evidence request asks for the historical fact rather than an on-chain reduction."
}