{"v":1,"requestId":"5910ef1a-79a4-4c07-987a-7f2aa33d55fd","chainId":1,"window":{"toBlock":26049164,"fromBlock":26048865,"toBlockHash":"0xed9429f3f55488921ccb2cf50a2b2305c0161234d455b8f6173c10021f5df346"},"answerType":"uint256","answer":"4370000","figure":"4370000","definitions":{"answer":"the block number, as a number","source":"Ethereum Foundation blog Byzantium HF announcement"},"recipe":{"kind":"panel","source":"https://blog.ethereum.org/2017/10/12/byzantium-hf-announcement"},"notes":"Historical fact: Byzantium activated at mainnet block 4,370,000 (EIP-609 meta, Ethereum Foundation announcement). Not read live from the network in this run; recalled from that source."}