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To: Pieter Wuille <pieter.wuille@gmail.com>,
Bitcoin Protocol Discussion <bitcoin-dev@lists.linuxfoundation.org>,
Juan Garavaglia <jg@112bit.com>
References: <SC1P152MB1648D0F9DF4279C49D755233F53F0@SC1P152MB1648.LAMP152.PROD.OUTLOOK.COM>
<CAPg+sBjrjUFJZnCtmcvZYs_pc4T3YzU_jtK+eZANyGKSLavrXg@mail.gmail.com>
From: Eric Voskuil <eric@voskuil.org>
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Subject: Re: [bitcoin-dev] Issolated Bitcoin Nodes
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-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
On 03/23/2017 05:20 PM, Pieter Wuille via bitcoin-dev wrote:
> On Thu, Mar 23, 2017 at 3:37 PM, Juan Garavaglia via bitcoin-dev
> <bitcoin-dev@lists.linuxfoundation.org> wrote:
>> Long story short, when nodes 0.13+ receive blocks from 0.13+
>> nodes all is ok, and those blocks propagate to older nodes with
>> no issues. But when a block tries to be propagated from bitcoind
>> 0.12.+ to newer ones those blocks are NOT being propagated to the
>> peers with newer versions while these newer blocks are being
>> propagated to peers with older versions with no issues.
>>
>> My conclusion is that we have a backward compatibility issue
>> between 0.13.X+ and older versions.
>
> Hello Juan,
>
> this is expected behaviour. Nodes with segwit active only download
> blocks from other segwit peers, as old peers cannot provide the
> witness data they need to verify the blocks.
Juan's statement pertains to incompatibility, not mysterious causation.
Clearly it's a material consideration. Is it an oversight that this is
not documented as an incompatibility in any of the segwit BIPs?
I don't recall any discussion on the importance of segwit bridge
nodes. Is there a plan for bridging mainnet?
e
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