What's new in version 2 of Block header message ?

joshlang

newbie

Activity: 26

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Quote from: Yves Cuicui on September 05, 2013, 09:34:46 AM

Anyway, this is not an information we can rely on.

I notice many blocks pretending to be version 2 but showing bad height encode values

See
http://blockexplorer.com/block/00000000000005d024e86337ca13439b7f3dbd5e1a005b1dbe510150d45b6e98 is block 200433 and pretends to be 436591499
http://blockexplorer.com/block/00000000000003c6947e260dc80d6ab426771a7ba9d8d5fb58ff66a0db26c361 is block 199914and pretends to be 436591499

May be such blocks must not be accepted by the network as the BIP34 is now enforced?

After block 227930, it's information you can rely on.

kjj

legendary

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For something like this, a supermajority of miners have to move in lockstep, or there is risk of forking.

Yves Cuicui

newbie

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Do you mean that some miners start building v2 blocks on main network while the debate was not closed?

kjj

legendary

Activity: 1302

Merit: 1026

Quote from: Yves Cuicui on September 05, 2013, 09:34:46 AM

Anyway, this is not an information we can rely on.

I notice many blocks pretending to be version 2 but showing bad height encode values

See
http://blockexplorer.com/block/00000000000005d024e86337ca13439b7f3dbd5e1a005b1dbe510150d45b6e98 is block 200433 and pretends to be 436591499
http://blockexplorer.com/block/00000000000003c6947e260dc80d6ab426771a7ba9d8d5fb58ff66a0db26c361 is block 199914and pretends to be 436591499

May be such blocks must not be accepted by the network as the BIP34 is now enforced?

Early on, there was some debate about the proper encoding. See this discussion for information on why the bogus encodings were allowed (specifically a post from gmaxwell on July 2nd).

Yves Cuicui

newbie

Activity: 18

Merit: 0

Anyway, this is not an information we can rely on.

I notice many blocks pretending to be version 2 but showing bad height encode values

See
http://blockexplorer.com/block/00000000000005d024e86337ca13439b7f3dbd5e1a005b1dbe510150d45b6e98 is block 200433 and pretends to be 436591499
http://blockexplorer.com/block/00000000000003c6947e260dc80d6ab426771a7ba9d8d5fb58ff66a0db26c361 is block 199914and pretends to be 436591499

May be such blocks must not be accepted by the network as the BIP34 is now enforced?

fpgaminer

hero member

Activity: 560

Merit: 517

Quote

Yeah - At block 227930, the previous 1000 contained the supermajority of 950.

Very cool

Thank you for taking the time to look that up.

joshlang

newbie

Activity: 26

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Yeah - At block 227930, the previous 1000 contained the supermajority of 950.

fpgaminer

hero member

Activity: 560

Merit: 517

Quote

95% rule ("Point of no return"): If 950 of the last 1,000 blocks are version 2 or greater, reject all version 1 blocks. (testnet3: 75 of last 100)

Are we here yet on mainnet?

Yves Cuicui

newbie

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Many thanks

Peter Todd

legendary

Activity: 1120

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Read this: https://en.bitcoin.it/wiki/BIP_0034

Yves Cuicui

newbie

Activity: 18

Merit: 0

The version field in block header message is now '2'.
Does someone know what is the difference compared to version 1?
Thanks

Topic: What's new in version 2 of Block header message ? (Read 1274 times)