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[2a00:1450:4864:20::233]) by gmr-mx.google.com with ESMTPS id 5b1f17b1804b1-424693bbbe4si529455e9.0.2024.06.16.13.32.13 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 16 Jun 2024 13:32:13 -0700 (PDT) Received-SPF: pass (google.com: domain of eth3rs@gmail.com designates 2a00:1450:4864:20::233 as permitted sender) client-ip=2a00:1450:4864:20::233; Received: by mail-lj1-x233.google.com with SMTP id 38308e7fff4ca-2e724bc46c4so42692821fa.2 for ; Sun, 16 Jun 2024 13:32:13 -0700 (PDT) X-Received: by 2002:a05:651c:2117:b0:2ec:f8a:6f14 with SMTP id 38308e7fff4ca-2ec0f8a7023mr57818381fa.38.1718569932896; Sun, 16 Jun 2024 13:32:12 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Ethan Heilman Date: Sun, 16 Jun 2024 16:30:07 -0400 Message-ID: Subject: Re: [bitcoindev] Network partition recovery To: Tao Effect Cc: Bitcoin Development Mailing List Content-Type: multipart/alternative; boundary="0000000000005f4330061b07be51" X-Original-Sender: eth3rs@gmail.com X-Original-Authentication-Results: gmr-mx.google.com; dkim=pass header.i=@gmail.com header.s=20230601 header.b=eopa0l9I; spf=pass (google.com: domain of eth3rs@gmail.com designates 2a00:1450:4864:20::233 as permitted sender) smtp.mailfrom=eth3rs@gmail.com; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Precedence: list Mailing-list: list bitcoindev@googlegroups.com; contact bitcoindev+owners@googlegroups.com List-ID: X-Google-Group-Id: 786775582512 List-Post: , List-Help: , List-Archive: , List-Unsubscribe: , X-Spam-Score: -0.5 (/) --0000000000005f4330061b07be51 Content-Type: text/plain; charset="UTF-8" > Have Bitcoiners gamed this out? Not that I am aware of. Short term partitions (10 to 30 minutes) would likely not be noticed by most users. Long term partitions (1 day to 1 week) would likely cause relying parties to find non-internet mechanisms to communicate blocks and transactions. If say 20% of the mining power was stuck in a partition, the miners in that partition would likely stop mining once they realized they were partitioned because they would understand they would lose all their rewards when the partition stops. Likely people in the partition would no longer respect confirmations made by miners in the partition because those confirmations will be reversed when the partition ends. It seems likely that parties (miners, relying parties) in the partition will attempt to communicate outside the partition to interact with Bitcoin. The issue becomes much trickier if the partition, partitions mining power exactly into 50%. It is unlikely that if the internet has a long term partition it will exactly split the mining power. > What happens when the Internet reconnects? "Longest" chain wins. > Or is a merge possible? Can it be done automatically? Some DAG chains do allow to two forks to be merged automatically including resolving double spends. Adding this functionality in Bitcoin would likely be the biggest consensus change in the history of Bitcoin. On Sat, Jun 15, 2024, 6:11 PM Tao Effect wrote: > What work has been done on recovering from a network partition? > > The day is fast approaching when Bitcoin could be split in two not by a > purposeful fork, but because the Internet is split in two. > > Have Bitcoiners gamed this out? What happens when the Internet reconnects? > Do we throw out half of the transactions? Or is a merge possible? Can it be > done automatically? > > - Greg > > -- > You received this message because you are subscribed to the Google Groups > "Bitcoin Development Mailing List" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to bitcoindev+unsubscribe@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/bitcoindev/CC066457-A396-4680-8F11-F013E5EFDD1E%40taoeffect.com > . > -- You received this message because you are subscribed to the Google Groups "Bitcoin Development Mailing List" group. To unsubscribe from this group and stop receiving emails from it, send an email to bitcoindev+unsubscribe@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/bitcoindev/CAEM%3Dy%2BXzVksuon-bUsc%3D44UEw0vWVi_QmB5jjtkLp2VdO2QzbQ%40mail.gmail.com. --0000000000005f4330061b07be51 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
> Have Bitcoiners gamed this out?

Not that I am aware of.=C2= =A0

Short term partition= s (10 to 30 minutes) would likely not be noticed by most users. Long term p= artitions (1 day to 1 week) would likely cause relying parties to find non-= internet mechanisms to communicate blocks and transactions.

If say 20% of the mining power was st= uck in a partition, the miners in that partition would likely stop mining o= nce they realized they were partitioned because they would understand they = would lose all their rewards when the partition stops. Likely people in the= partition would no longer respect confirmations made by miners in the part= ition because those confirmations will be reversed when the partition ends.=

It seems likely that pa= rties (miners, relying parties) in the partition will attempt to communicat= e outside the partition to interact with Bitcoin.
The issue becomes much trickier if the partition,= partitions mining power exactly into 50%. It is unlikely that if the inter= net has a long term partition it will exactly split the mining power.=C2=A0=

> What happens when = the Internet reconnects?

"Longest" chain wins.

=C2=A0> Or is a merge possible? Can it be done automatically?<= br>

Some DAG chains do a= llow to two forks to be merged automatically including resolving double spe= nds. Adding this functionality in Bitcoin would likely be the biggest conse= nsus change in the history of Bitcoin.



= On Sat, Jun 15, 2024, 6:11 PM Tao Effect <contact@taoeffect.com> wrote:
What work has been done on recovering from= a network partition?

The day is fast approaching when Bitcoin could be split in two not by a pur= poseful fork, but because the Internet is split in two.

Have Bitcoiners gamed this out? What happens when the Internet reconnects? = Do we throw out half of the transactions? Or is a merge possible? Can it be= done automatically?

- Greg

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