Veo lo que parece una bifurcación en la red de prueba de Ropsten en el bloque 296151 (6 de enero, 23:14 UTC). ¿Es esto esperado?
Mi nodo Parity local (Parity/v1.4.7-beta-f2058bd-20161227/x86_64-macos/rustc1.13.0) muestra hash de bloque 0x779e9f9...:
> web3.eth.getBlock(296151)
{ author: '0x18e79a47d8a58bef5aaecbba85ea1420649c64a8',
difficulty: { [String: '219610162'] s: 1, e: 8, c: [ 219610162 ] },
extraData: '0xd5830104078650617269747986312e31342e30826d61',
gasLimit: 4707788,
gasUsed: 348478,
hash: '0x779e9f9558143be43f3eeb58ad1aa7764a03cf7f1bda4d1c29c2e1244d5e606f',
logsBloom: '...',
miner: '0x18e79a47d8a58bef5aaecbba85ea1420649c64a8',
mixHash: '0xbbb4c781b116ea5cc9cd7dd0a74f2464111cbfa3ed46bdd55cf31b774491f5ad',
nonce: '0x0b4ee2bdab75890e',
number: 296151,
parentHash: '0x39df9773206e47b6555531ee0829dd91d1c91e4dad705688ddee9e6d6a94cd32',
receiptsRoot: '0xf25f318553e87dff90cf96ace80ed47f624b44ead13400709cd19fc24f24cdb5',
sealFields:
[ '0xbbb4c781b116ea5cc9cd7dd0a74f2464111cbfa3ed46bdd55cf31b774491f5ad',
'0x0b4ee2bdab75890e' ],
sha3Uncles: '0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347',
size: 2185,
stateRoot: '0x934a68c88a3ca2fea112fb08ef2055c9f1ea8310926de3da98cdb51d69ebad3b',
timestamp: 1483741759,
totalDifficulty: { [String: '70295938324374'] s: 1, e: 13, c: [ 70295938324374 ] },
transactions:
[ '0x2297defea0253c438c4c7a2d399f60fbdf3c647f9dbd2a558165612251030eb6',
'0x4542e0daaceda8be6039ec135aad5c45cd2026e17884a6d10fec6a9338dc1d77',
'0x699761a22a793862eacc5c6f80fee7f0bbef318f8eaf756f40a50edf85755a77',
'0x7173c6479087a3365ebd412e6ef871b40f5ef1269e42fae265e3cf701aeffcb3',
'0xc68d9b6d271ac294fbc1f86a703f3cbbfe57020ec4087256893565556de74a30',
'0xd331437b8862ae97f04468f2fe4af54277299501c5deaeeaeaa5fe9184d4b07d',
'0x3fb032b0c385eba35130e9d55acafaea6a075d91e7c496181435bad49d312ace',
'0x7e3e3f41526d453165c2dd4c58e9aa5d6e83398d6ad08a316b6017b4f834c0ac',
'0xbc3f4a530c26dd9c4cad7803347e33d7add544d56a6abcca538703bc1e4d2663',
'0x676fb70068c62c9f652ceb5475f96f7ca8efe702b0eb97b0e2dfedd2c53b60f5',
'0xb12084f5f78ad1e6e388aee22d01cc5015f743da30270c5da99000ca316e6c7b',
'0x38250f96bf25d98b4f9d54d281f7489f42843a4fafba22acb79db741018e58f1',
'0x66cc9fdc8645ab142ecb425cbb130f5c153e89c827a87f8f536c46ab60598351',
'0x5c776d9fadc2f07d4742c5fe6daf41a2997596ec15fee17c60a4da1651daf167' ],
transactionsRoot: '0x7717f5770efde5508bbe97f306e5897e58741a15777460c888e4b40b6c599d56',
uncles: [] }
Pero https://testnet.etherscan.io/block/296151 muestra un bloque diferente con el mismo padre:
Height: 296151
TimeStamp: 5 days 14 mins ago (Jan-06-2017 11:14:41 PM +UTC)
Transactions: 0 transactions and 0 contract internal transactions in this block
Hash: 0xb3fe6d6ba7bfa04a9e8c295033e603d617b7dd1c4244f0f70997de0492b7e4c7
Parent Hash: 0x39df9773206e47b6555531ee0829dd91d1c91e4dad705688ddee9e6d6a94cd32
Sha3Uncles: 0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347
Mined By: 0x817562f86cee143236962249453ae54e2b530140 IN 2784 secs
Difficulty: 209,505,820
Total Difficulty: 70,295,928,220,032
Size: 526 bytes
Gas Limit: 4,716,988
Gas Used: 0
Nonce: 0x4880dcc18186c893
Block Reward: 5 Ether
Uncles Reward: 0
Extra Data: Get forked! (Hex:0x47657420666f726b656421)
Observe el hash de bloque diferente y "¡Se bifurca!" mensaje en extraData.
Infura muestra el mismo bloque que etherscan.io:
curl -s -X POST -H "Content-Type: application/json" -d '{"jsonrpc":"2.0","method":"eth_getBlockByNumber","params":["296151",false],"id":0}' https://testnet.infura.io/<apikeyXXX>
"result" : {
"transactionsRoot" : "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
"totalDifficulty" : "0x3fef0bd4a980",
"size" : "0x20e",
"parentHash" : "0x39df9773206e47b6555531ee0829dd91d1c91e4dad705688ddee9e6d6a94cd32",
"mixHash" : "0x4196dda6dde22c62fbe95160b300935589f2eb5b19826cf01b559b0f7023125d",
"extraData" : "0x47657420666f726b656421",
"difficulty" : "0xc7cce1c",
"hash" : "0xb3fe6d6ba7bfa04a9e8c295033e603d617b7dd1c4244f0f70997de0492b7e4c7",
"number" : "0x484d7",
"stateRoot" : "0x263abade588bbce1bc9dcc62f203d3b31c75474145942d88ba4bc2582862c884",
"miner" : "0x817562f86cee143236962249453ae54e2b530140",
"transactions" : [],
"sha3Uncles" : "0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347",
"gasUsed" : "0x0",
"gasLimit" : "0x47f9bc",
"logsBloom" : "...",
"timestamp" : "0x587024e1",
"uncles" : [],
"receiptsRoot" : "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
"nonce" : "0x4880dcc18186c893"
},
EDITAR 12/01/2016:
Mi nodo local muestra que el último bloque es:
> web3.eth.getBlock('latest')
{
author: '0x919eb73b9d4d306188b12874f3efdccb6cdcd1b8',
difficulty: { [String: '11274423'] s: 1, e: 7, c: [ 11274423 ] },
extraData: '0xd783010502846765746887676f312e372e33856c696e7578',
gasLimit: 4712388,
gasUsed: 43104,
hash: '0xc30c5b3874d718de2a4d902f8a971cee4c4b0c0072e6c084c74efd83762efb31',
logsBloom: '0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',
miner: '0x919eb73b9d4d306188b12874f3efdccb6cdcd1b8',
mixHash: '0x9b8167fc2e675f65294c09acd2ef7e48a8467814fb05217260c0df6735ce050b',
nonce: '0x5c8934db7ca0c3da',
number: 304548,
parentHash: '0x890f0b9e8960872a0708c0b4a7310b77088ef6e1b31c8538132427bfeadc8e38',
receiptsRoot: '0x60879c208751b2693f21cdb42430e39534e09dc69885d583579211338d0fba12',
sealFields:
[ '0x9b8167fc2e675f65294c09acd2ef7e48a8467814fb05217260c0df6735ce050b',
'0x5c8934db7ca0c3da' ],
sha3Uncles: '0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347',
size: 861,
stateRoot: '0x2bd997576e784437838f33b0d14474468af0f2ae7d48946b281aa843b83f35ae',
timestamp: 1483922649,
totalDifficulty: { [String: '70669121674025'] s: 1, e: 13, c: [ 70669121674025 ] },
transactions:
[ '0x4fabc7fbd712666527522c985b618fea7be25c5507b066393f258632b65ad5e2',
'0x22d0cd3abcaad4c221b8f92e74c359bb22ce7d78fb52bb28a356738a8c8db488' ],
transactionsRoot: '0x5f3992b1d9e0cc84bee3b3b876fd87adce1de81b09b74800b107f569f40c4485',
uncles: []
}
Ha estado atascado en este bloque durante bastante tiempo. La marca de tiempo se traduce como 2017-01-09T00:44:09.000Zhace unos 3 días.
EDITAR 12/01/2016:
Actualicé la paridad a la última confirmación del maestro (Parity/v1.6.0-unstable-887e5f7-20170112/x86_64-macos/rustc1.13.0) y resincronicé desde cero. Ahora obtengo la cadena "principal":
> web3.eth.getBlock(296151).hash
'0xb3fe6d6ba7bfa04a9e8c295033e603d617b7dd1c4244f0f70997de0492b7e4c7'
Entonces, el nodo de monitoreo geth primero parece haber importado el mismo que se informó anteriormente:
Jan 06 23:29:21 geth-testnet: I0106 22:29:21.064938 core/blockchain.go:1073] imported 1 blocks, 14 txs ( 0.348 Mg) in 19.168ms (18.180 Mg/s). #296151 [779e9f95…]
Un hash 0x779e9f9558143be43f3eeb58ad1aa7764a03cf7f1bda4d1c29c2e1244d5e606f.
Luego, un poco más adelante:
Jan 07 03:01:22 geth-testnet: I0107 02:01:22.283970 core/blockchain.go:1073] imported 1 blocks, 0 txs ( 0.000 Mg) in 3.660ms ( 0.000 Mg/s). #297061 [3f857e90…]
Jan 07 03:01:33 geth-testnet: I0107 02:01:33.483050 core/blockchain.go:1073] imported 192 blocks, 0 txs ( 0.000 Mg) in 395.052ms ( 0.000 Mg/s). #296342 [b3fe6d6b… / 0086e376…]
Jan 07 03:01:35 geth-testnet: I0107 02:01:35.155511 core/blockchain.go:1073] imported 576 blocks, 0 txs ( 0.000 Mg) in 948.451ms ( 0.000 Mg/s). #296918 [cf88cd25… / e11de460…]
Jan 07 03:01:36 geth-testnet: I0107 02:01:36.089260 core/blockchain.go:1073] imported 134 blocks, 0 txs ( 0.000 Mg) in 929.458ms ( 0.000 Mg/s). #297052 [a8cfdb90… / 07022b4a…]
Jan 07 03:01:39 geth-testnet: I0107 02:01:39.327721 core/blockchain.go:1073] imported 1 blocks, 0 txs ( 0.000 Mg) in 3.956ms ( 0.000 Mg/s). #297053 [06757b24…]
Primero hay una importación de 192 bloques, que termina en 296342, por lo que parece reorganizarse desde 296150, lo que parece consistente. Entonces, el 7 de enero a las 03:01, parece que se realizó un ataque del 51%, implementando 902 bloques (más o menos).
Dado que Parity tiene habilitada la poda de 64 bloques de forma predeterminada, no podrían reorganizarse en la cadena 'canon' sin una resincronización desde cero, dejándolos en otra cadena.
tjaden hess
privacidadisahumanright.eth
gethnodo informaweb3.eth.getBlock(296151).hashcomo"0xb3fe6d6ba7bfa04a9e8c295033e603d617b7dd1c4244f0f70997de0492b7e4c7"privacidadisahumanright.eth
--chain ropsten --warpyweb3.eth.getBlock(296151).hashvuelve"0xb3fe6d6ba7bfa04a9e8c295033e603d617b7dd1c4244f0f70997de0492b7e4c7".Parity//v1.5.0-unstable-6c3b932-20170103/x86_64-macos/rustc1.13.0cerdito
cerdito
web3.eth.getBlock(296151).hash '0x779e9f955...tjaden hess
cerdito
cerdito