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Date: Fri, 17 Jan 2025 06:53:52 -0800 (PST)
From: Andrew Toth <andrewstoth@gmail.com>
To: Bitcoin Development Mailing List <bitcoindev@googlegroups.com>
Message-Id: <30737859-573e-40ea-9619-1d18c2a6b0f4n@googlegroups.com>
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References: <6FDAD97F-7C5F-474B-9EE6-82092C9073C5@sprovoost.nl>
Subject: [bitcoindev] Re: Who uses or wants to use PSBTv2 (BIP370)
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BIP375 Sending Silent Payments with PSBTs uses PSBTv2, specifically the PSB=
T_OUT_SCRIPT=20
field.
For silent payments, the output script is not known at the time of=20
creation, so it's not possible to create an unsigned transaction with an=20
output script as required in v0.
On Friday, January 17, 2025 at 4:17:49=E2=80=AFAM UTC-5 Sjors Provoost wrot=
e:
> Dear list,
>
> It's been a few years since BIP370 was proposed [0]. It's a backwards=20
> compatible change to the PSBT standard defined by BIP174 [1]. Its main=20
> benefit is the ability to add new inputs and outputs to a transaction.
>
> There's a Bitcoin Core pull request #21283 implements support [2], but ha=
s=20
> seen very little review so far. Being able to test it against other=20
> implementation would aid in review.
>
> So which projects are using PSBTv2 or would very much like to?
>
> So far I've learned that Core Lightning uses it. They convert it back to=
=20
> v0 when interacting with Bitcoin Core, which they find suboptimal [3].
>
> Feel free to answer here on Stack Exchange [4].
>
> Kind regards,
>
> Sjors Provoost
>
> [0] https://github.com/bitcoin/bips/blob/master/bip-0370.mediawiki
> [1] https://github.com/bitcoin/bips/blob/master/bip-0174.mediawiki
> [2] https://github.com/bitcoin/bitcoin/pull/21283
> [3] https://github.com/bitcoin/bitcoin/pull/21283#issuecomment-2597171643
> [4]=20
> https://bitcoin.stackexchange.com/questions/125384/who-uses-or-wants-to-u=
se-psbtv2-bip370
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<div>BIP375=C2=A0<span>Sending Silent Payments with PSBTs</span> uses PSBTv=
2, specifically the <span>PSBT_OUT_SCRIPT field.</span></div><div><span><br=
/></span></div><div><span>For silent payments, the output script is not kn=
own at the time of creation, so it's not possible to create an unsigned tra=
nsaction with an output script as required in v0.<br /></span></div><br /><=
div class=3D"gmail_quote"><div dir=3D"auto" class=3D"gmail_attr">On Friday,=
January 17, 2025 at 4:17:49=E2=80=AFAM UTC-5 Sjors Provoost wrote:<br/></d=
iv><blockquote class=3D"gmail_quote" style=3D"margin: 0 0 0 0.8ex; border-l=
eft: 1px solid rgb(204, 204, 204); padding-left: 1ex;">Dear list,
<br>
<br>It's been a few years since BIP370 was proposed [0]. It's a bac=
kwards compatible change to the PSBT standard defined by BIP174 [1]. Its ma=
in benefit is the ability to add new inputs and outputs to a transaction.
<br>
<br>There's a Bitcoin Core pull request #21283 implements support [2], =
but has seen very little review so far. Being able to test it against other=
implementation would aid in review.
<br>
<br>So which projects are using PSBTv2 or would very much like to?
<br>
<br>So far I've learned that Core Lightning uses it. They convert it ba=
ck to v0 when interacting with Bitcoin Core, which they find suboptimal [3]=
.
<br>
<br>Feel free to answer here on Stack Exchange [4].
<br>
<br>Kind regards,
<br>
<br>Sjors Provoost
<br>
<br>[0] <a href=3D"https://github.com/bitcoin/bips/blob/master/bip-0370.med=
iawiki" target=3D"_blank" rel=3D"nofollow" data-saferedirecturl=3D"https://=
www.google.com/url?hl=3Den&q=3Dhttps://github.com/bitcoin/bips/blob/mas=
ter/bip-0370.mediawiki&source=3Dgmail&ust=3D1737211786688000&us=
g=3DAOvVaw3eDTC1kKwDpnzpLNl976u0">https://github.com/bitcoin/bips/blob/mast=
er/bip-0370.mediawiki</a>
<br>[1] <a href=3D"https://github.com/bitcoin/bips/blob/master/bip-0174.med=
iawiki" target=3D"_blank" rel=3D"nofollow" data-saferedirecturl=3D"https://=
www.google.com/url?hl=3Den&q=3Dhttps://github.com/bitcoin/bips/blob/mas=
ter/bip-0174.mediawiki&source=3Dgmail&ust=3D1737211786688000&us=
g=3DAOvVaw0RCoybCWL_KrK8BjQaYkoo">https://github.com/bitcoin/bips/blob/mast=
er/bip-0174.mediawiki</a>
<br>[2] <a href=3D"https://github.com/bitcoin/bitcoin/pull/21283" target=3D=
"_blank" rel=3D"nofollow" data-saferedirecturl=3D"https://www.google.com/ur=
l?hl=3Den&q=3Dhttps://github.com/bitcoin/bitcoin/pull/21283&source=
=3Dgmail&ust=3D1737211786688000&usg=3DAOvVaw16wQU-oToTB5RJHvHID6_s"=
>https://github.com/bitcoin/bitcoin/pull/21283</a>
<br>[3] <a href=3D"https://github.com/bitcoin/bitcoin/pull/21283#issuecomme=
nt-2597171643" target=3D"_blank" rel=3D"nofollow" data-saferedirecturl=3D"h=
ttps://www.google.com/url?hl=3Den&q=3Dhttps://github.com/bitcoin/bitcoi=
n/pull/21283%23issuecomment-2597171643&source=3Dgmail&ust=3D1737211=
786688000&usg=3DAOvVaw3ZGG8onrvjBxs2q1D0Qvw2">https://github.com/bitcoi=
n/bitcoin/pull/21283#issuecomment-2597171643</a>
<br>[4] <a href=3D"https://bitcoin.stackexchange.com/questions/125384/who-u=
ses-or-wants-to-use-psbtv2-bip370" target=3D"_blank" rel=3D"nofollow" data-=
saferedirecturl=3D"https://www.google.com/url?hl=3Den&q=3Dhttps://bitco=
in.stackexchange.com/questions/125384/who-uses-or-wants-to-use-psbtv2-bip37=
0&source=3Dgmail&ust=3D1737211786688000&usg=3DAOvVaw2T6cS0WNUtk=
zrvkMDLKmRh">https://bitcoin.stackexchange.com/questions/125384/who-uses-or=
-wants-to-use-psbtv2-bip370</a></blockquote></div>
<p></p>
-- <br />
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