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[2a00:1450:4864:20::42a]) by gmr-mx.google.com with ESMTPS id ffacd0b85a97d-37ee0bbf16bsi14446f8f.3.2024.10.20.00.33.29 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 20 Oct 2024 00:33:29 -0700 (PDT) Received-SPF: pass (google.com: domain of ask4ismailsadiq@gmail.com designates 2a00:1450:4864:20::42a as permitted sender) client-ip=2a00:1450:4864:20::42a; Received: by mail-wr1-x42a.google.com with SMTP id ffacd0b85a97d-37ece998fe6so151049f8f.1 for ; Sun, 20 Oct 2024 00:33:29 -0700 (PDT) X-Received: by 2002:a5d:47ad:0:b0:375:bb30:6525 with SMTP id ffacd0b85a97d-37ea2176e56mr3071905f8f.1.1729409606936; Sun, 20 Oct 2024 00:33:26 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Abubakar Ismail Date: Sun, 20 Oct 2024 08:33:16 +0100 Message-ID: Subject: Re: [bitcoindev] Redefine packages to discourage address reuse To: "/dev /fd0" Cc: Bitcoin Development Mailing List Content-Type: multipart/alternative; boundary="0000000000004af0140624e38da5" X-Original-Sender: ask4ismailsadiq@gmail.com X-Original-Authentication-Results: gmr-mx.google.com; dkim=pass header.i=@gmail.com header.s=20230601 header.b=KuDRvmdi; spf=pass (google.com: domain of ask4ismailsadiq@gmail.com designates 2a00:1450:4864:20::42a as permitted sender) smtp.mailfrom=ask4ismailsadiq@gmail.com; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com; dara=pass header.i=@googlegroups.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 (/) --0000000000004af0140624e38da5 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hi Floppy > however packages could be redefined to avoid address >re-use in package transactions. What type of redefinition are you talking about here, is this not policy rule still. I don't think it's good for a node to reject an incentive compatible transaction in a package because it reuses an address. I believe miners won't. > The only downside that I could think of is the scanning time required to check address reuse. Maybe others could suggest solutions for this problem or we can limit the address reuse check only for the chain of transactions. Other disadvantage of this is that it will affect compact block reconstruction, nodes fee estimation. Wouldn't it be better to encourage using other safe mitigations of address reuse like silent payments? Abubakar On Sun, Oct 20, 2024, 8:01=E2=80=AFAM /dev /fd0 wro= te: > Hi Bitcoin Developers, > > Address re-use is bad for privacy and such transactions affect everyone > involved. A mempool policy to reject such transactions will be useless, > however packages could be redefined to avoid address re-use in package > transactions. > > BIP 331 defines packages as a list of unconfirmed transactions, > representable by a connected Directed Acyclic Graph (a directed edge exis= ts > between a transaction that spends the output of another transaction). Wit= h > the new definition, transactions with address reuse cannot be a part of > package relayed by nodes with SENDPACKAGES P2P message. > > The only downside that I could think of is the scanning time required to > check address reuse. Maybe others could suggest solutions for this proble= m > or we can limit the address reuse check only for the chain of transaction= s. > > I am not sure if BIP author would agree with this change and a new BIP > wont make a difference if its not implemented in bitcoin core. > > /dev/fd0 > floppy disk guy > > -- > 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/b383aad2-1abc-4b82-9851-1750= b1b52f12n%40googlegroups.com > > . > --=20 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 e= mail to bitcoindev+unsubscribe@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/= bitcoindev/CAHR1cdW9nP3-HEXr-QMoHag7yGChZCtXEadMZON4PFJidqEMsQ%40mail.gmail= .com. --0000000000004af0140624e38da5 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable

Hi Floppy=

=

> however packages could be redefined= to avoid address >re-use in package transactions.


<= p dir=3D"ltr" style=3D"font-size:12.8px;line-height:1.38;margin-top:0pt;mar= gin-bottom:0pt">What type of redefinition ar= e you talking about here, is this not policy rule still.

I don't think it's good f= or a node to reject an incentive compatible transaction in a package becaus= e it reuses an address. I believe miners won't.


> The only downside that I could think of is the scanning tim= e required to check address reuse. Maybe others could suggest solutions for= this problem or we can limit the address reuse check only for the chain of= transactions.


Other disadvantage of this is that it will affect compact block rec= onstruction, nodes fee estimation.



Wouldn't it be better to encourage using other safe mitigations of= address reuse like silent payments?


= Abubakar


On Sun, Oct 20, 2024, 8:01=E2=80=AFAM /dev /fd0 &l= t;alicexbtong@gmail.com> wr= ote:
Hi Bitcoin Developers,
Address re-use is bad for privacy and such transactions affect = everyone involved. A mempool policy to reject such transactions will be use= less, however packages could be redefined to avoid address re-use in packag= e transactions.

BIP 331 defines packages as a list= of unconfirmed transactions, representable by a connected Directed Acyclic= Graph (a directed edge exists between a transaction that spends the output= of another transaction). With the new definition, transactions with addres= s reuse cannot be a part of package relayed by nodes with SENDPACKAGES P2P = message.

The only downside that I could think of i= s the scanning time required to check address reuse. Maybe others could sug= gest solutions for this problem or we can limit the address reuse check onl= y for the chain of transactions.

I am not sure if = BIP author would agree with this change and a new BIP wont make a differenc= e if its not implemented in bitcoin core.

/dev/fd0=
floppy disk guy

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