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From: Peter Todd <pete@petertodd.org>
Date: Thu, 24 Sep 2015 18:41:07 +0000
To: Suhas Daftuar <sdaftuar@gmail.com>,
	Suhas Daftuar via bitcoin-dev <bitcoin-dev@lists.linuxfoundation.org>, 
	Tier Nolan <tier.nolan@gmail.com>
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Cc: Bitcoin Dev <bitcoin-dev@lists.linuxfoundation.org>
Subject: Re: [bitcoin-dev] [BIP Proposal] New "sendheaders" p2p message
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-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512



On 24 September 2015 14:37:40 GMT-04:00, Suhas Daftuar via bitcoin-dev <bitcoin-dev@lists.linuxfoundation.org> wrote:
>On Thu, Sep 24, 2015 at 2:17 PM, Tier Nolan via bitcoin-dev <
>bitcoin-dev@lists.linuxfoundation.org> wrote:
>
>>
>> Is there actually a requirement for the new message?  New nodes could
>just
>> unilaterally switch to sending headers and current nodes would be
>> compatible.
>>
>
>I don't believe that unilaterally switching to headers announcements
>would
>work for all network participants -- both for users running older
>Bitcoin
>Core versions (anything before 0.10, which I believe all ignore headers
>messages) and for non-Bitcoin Core software that participates on the
>network (which may ignore headers messages too, I'm not sure what all
>is
>out there).

You can enable the behaviour based on advertised p2p network version.
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