path: root/3d/1e50fa42c6b5eff47514124cc77e37f7199366

Return-Path: <benthecarman@live.com>
Received: from smtp2.osuosl.org (smtp2.osuosl.org [IPv6:2605:bc80:3010::133])
 by lists.linuxfoundation.org (Postfix) with ESMTP id 6E72BC002A
 for <bitcoin-dev@lists.linuxfoundation.org>;
 Mon, 22 May 2023 22:51:53 +0000 (UTC)
Received: from localhost (localhost [127.0.0.1])
 by smtp2.osuosl.org (Postfix) with ESMTP id 340CA40395
 for <bitcoin-dev@lists.linuxfoundation.org>;
 Mon, 22 May 2023 22:51:53 +0000 (UTC)
DKIM-Filter: OpenDKIM Filter v2.11.0 smtp2.osuosl.org 340CA40395
Authentication-Results: smtp2.osuosl.org; dkim=pass (2048-bit key,
 unprotected) header.d=live.com header.i=@live.com header.a=rsa-sha256
 header.s=selector1 header.b=gQjJkTbK
X-Virus-Scanned: amavisd-new at osuosl.org
X-Spam-Flag: NO
X-Spam-Score: -0.101
X-Spam-Level: 
X-Spam-Status: No, score=-0.101 tagged_above=-999 required=5
 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1,
 DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001,
 HTML_MESSAGE=0.001, PDS_OTHER_BAD_TLD=1.999, SPF_HELO_PASS=-0.001,
 SPF_PASS=-0.001] autolearn=no autolearn_force=no
Received: from smtp2.osuosl.org ([127.0.0.1])
 by localhost (smtp2.osuosl.org [127.0.0.1]) (amavisd-new, port 10024)
 with ESMTP id FJ0FtOusU8ZQ
 for <bitcoin-dev@lists.linuxfoundation.org>;
 Mon, 22 May 2023 22:51:52 +0000 (UTC)
X-Greylist: whitelisted by SQLgrey-1.8.0
DKIM-Filter: OpenDKIM Filter v2.11.0 smtp2.osuosl.org 0C39740144
Received: from NAM12-MW2-obe.outbound.protection.outlook.com
 (mail-mw2nam12acsn20806.outbound.protection.outlook.com
 [IPv6:2a01:111:f400:fe5a::806])
 by smtp2.osuosl.org (Postfix) with ESMTPS id 0C39740144
 for <bitcoin-dev@lists.linuxfoundation.org>;
 Mon, 22 May 2023 22:51:51 +0000 (UTC)
ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none;
 b=kkUSfumxT5lMIsPqNpdpe4abvH7k3VhlI4FNpCL2aniWj3HIdsiCPQmsVx6o3BqSLvK5rQ040YZ15EWa/zYltDxQodFQt2uTur5ZjK+HhGfmLZO+ryZAlJU7JxVSF/OnK3HFo5ZVN7Zdj5ucFmO8127U/LxRyNCeF0ZzWtWDLeHVjG9WhrVp6twaVZM69xO6I+PeRiqq5hfASRmd3I6vRSFOTqdMQBCwjZ5UFozOwdNa78zvfdvt7S4C0rDnDYYPtYV9w8bC2ua2F9BgNXpQ+B/UXC4QEak1YY7xbndT0C9rYUV9PTeiBjYJlqTF2ESJ9choWn4wFvhbeXKLyo4TLw==
ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; 
 s=arcselector9901;
 h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1;
 bh=I+xOqUSN3slmvlkc0zv8FAoW0k608ozBoqGzI/A2yvk=;
 b=G/1xzb7IE8nt/e2VOqhZCRSYBDpmtIHC6L8h9Ua6e7cLSyJLamB+RxOlUVC/aE69BrPGSfauZOoh9yw1ep2plpdbh/DI3N2wd6mP+qBc6kUtccAOTtGsKJ4+t2FhEbCNiJqd7c4vRwmzIiA46qVZYg2utCYPU/QA6LNJ2+3nxkD7UvlWstb4dlhhBsX1ZB5buMqtUolB8kba9q5Aqd6T/eCICfNT+M2JqOskNYqw3kzXB8RE0o3kCBgOTTHBcxSyq/gI2nsNh21T/70jl0kLhtW5l8rbH8Poc2eob6WYqmLevkmQ11UDM45UCWI+TbviX5ygMT3C7c7gROolTtqNQQ==
ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=none; dmarc=none;
 dkim=none; arc=none
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=live.com; s=selector1; 
 h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck;
 bh=I+xOqUSN3slmvlkc0zv8FAoW0k608ozBoqGzI/A2yvk=;
 b=gQjJkTbKcD4crbrjdpIQn0OhlOejqnkjNzVdndS9Afb+sVdP1tSW5ep7De3xFaoWYU9znqhiiSDB5WPnH+wOGhezPX1Crb7b5VOftD5IEPkT3LnRyzI9uL1o2EYZzNyQ03KrGa32dZLWbpME1bntBT3xRVTnMdq8UnYme81lEXm3IJGuuZFqAmqHba3deC8UrUzSFE4P2+bEtVvBCzlHesF6b7yETqKDRcj6P0qvEplk8kwVY2cAlNHeej3H7GIm6YQCac9l5raXWmfbg5A2tCGT2g6tn2eh1CBZZXGDlfBTVZLZWMXrqmRcFFm4aZAWKXLFopqFXdN7DokG0f/i1w==
Received: from SJ1P223MB0531.NAMP223.PROD.OUTLOOK.COM (2603:10b6:a03:45a::15)
 by PH7P223MB0550.NAMP223.PROD.OUTLOOK.COM (2603:10b6:510:1b1::6) with
 Microsoft SMTP Server (version=TLS1_2,
 cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6411.28; Mon, 22 May
 2023 22:51:49 +0000
Received: from SJ1P223MB0531.NAMP223.PROD.OUTLOOK.COM
 ([fe80::ffdd:1c42:3f26:f37]) by SJ1P223MB0531.NAMP223.PROD.OUTLOOK.COM
 ([fe80::ffdd:1c42:3f26:f37%7]) with mapi id 15.20.6411.028; Mon, 22 May 2023
 22:51:49 +0000
From: Ben Carman <benthecarman@live.com>
To: alicexbt <alicexbt@protonmail.com>, Bitcoin Protocol Discussion
 <bitcoin-dev@lists.linuxfoundation.org>
Thread-Topic: [bitcoin-dev] Coinjoin with less steps using ALL|ANYONECANPAY
Thread-Index: AQHZjPp53ZE/04cEQkaHZbfUzW/g2a9m4xE3
Date: Mon, 22 May 2023 22:51:49 +0000
Message-ID: <SJ1P223MB0531D7D62140F0516A25897AA1439@SJ1P223MB0531.NAMP223.PROD.OUTLOOK.COM>
References: <EWAXAmgFlZ8XQJOYO8VTH7Zj0tTAftwy-ylaGvf3Giealz1FFb97CbcxjP0q-Zu85XoAzOG0ivdYIKa_kG77ooHqBvCP7YOZOkb6yHmX75s=@protonmail.com>
In-Reply-To: <EWAXAmgFlZ8XQJOYO8VTH7Zj0tTAftwy-ylaGvf3Giealz1FFb97CbcxjP0q-Zu85XoAzOG0ivdYIKa_kG77ooHqBvCP7YOZOkb6yHmX75s=@protonmail.com>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach: 
X-MS-TNEF-Correlator: 
msip_labels: 
x-ms-exchange-messagesentrepresentingtype: 1
x-tmn: [Zrb+KowVenXri4xP1jlA6rhIDJtvILGs/WUW3ghL7ks=]
x-ms-publictraffictype: Email
x-ms-traffictypediagnostic: SJ1P223MB0531:EE_|PH7P223MB0550:EE_
x-ms-office365-filtering-correlation-id: c3341e10-8820-4411-bc16-08db5b1720fc
x-microsoft-antispam: BCL:0;
x-microsoft-antispam-message-info: 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
x-ms-exchange-antispam-messagedata-chunkcount: 1
x-ms-exchange-antispam-messagedata-0: =?iso-8859-1?Q?+Fq8wiCSgyN4KZM7Dxcu4ykAfCt3BJlYxFBPSSBysOTMi5p4jMssfVX8ce?=
 =?iso-8859-1?Q?0JsQRCar6Z/dziaCkNUtojLCelKBbUyum9dPtxXdlbuquMukEdgmuUoQdc?=
 =?iso-8859-1?Q?FekjLUk67chWoxQBhRH/EdXg1RLdizb+EFupEjJx+P5UTsyDujnisjmXjR?=
 =?iso-8859-1?Q?sHLezVoiaGYIqcnJshEevn53QdWVcEDt2H/laEN4SMAnTdRu/ALbBvgXjc?=
 =?iso-8859-1?Q?QQvVvODupNJdQ8O74q9Q6YwisR3nTto10f9iNiX4W08PI408M0i0oDD6ap?=
 =?iso-8859-1?Q?l8SN+bPKeT5H2gSD5f52IcVIVHxhquXBZZ+HBPuvCVv5exh1EouWtKWgJQ?=
 =?iso-8859-1?Q?K+YL4fgIpc9e6GgN9hwGFA+5iE5uD4lRH1HEkxLRcLScR26eP2s3TKJFXU?=
 =?iso-8859-1?Q?6FmAcC44PcJ1kzqYp1ALzrUq7ggG04oAT5Bo7A/E/imXQJU4TxXYVVP8ZJ?=
 =?iso-8859-1?Q?6wCQpOh+wSGXkt6jtOkKT9U8Fbxj0edfixor25Ij+IyGZL/13mW6ZeJQZb?=
 =?iso-8859-1?Q?eCS6dugr7jp02ATzGnPQX0gqxew5U74u1uBZJHYiNo1G2zPMUTNYI9j5rO?=
 =?iso-8859-1?Q?V7HpQZOraXo+mKkbWyeIstw5xufevdi/bh4eDSqR00YUDDM/QBUGz00naD?=
 =?iso-8859-1?Q?94+2MaCfOT5FDzs1y0Mqlu1upbeGhYm1YtfaLUofrHkSy3NEzaeX6dpxpS?=
 =?iso-8859-1?Q?AnOZLoC14tDSn+7gh+mPZJqNRj5WgobY1YKXNS40bq138Gs/PM8Ck3LMh8?=
 =?iso-8859-1?Q?QKdcE6zVNJdTMjF7gWBNAMOWb4LvKCuwdv62iMZ4BP69JrzCvNbfDbQhhL?=
 =?iso-8859-1?Q?4Gxz3cKki4br22irUD5uWhzlB9hvUnHyEBH0zHW/YKswkzyGPH82g/uzLE?=
 =?iso-8859-1?Q?enWNLVcUeIB/RToju/HuVhYx9HXrHF5zlNhudHS24X8DUKWnOoMdPz9FJt?=
 =?iso-8859-1?Q?6mxb9ujZqaoSJKehrsPBkuDvLWLOw74TI2Owo051ed5PaYiTHT71sInCDe?=
 =?iso-8859-1?Q?1l57QfB9kJJStbtANCcvsyB2GghBfbCLLWKicC5nmKr7Pqmyl8ooU0SNsc?=
 =?iso-8859-1?Q?LEoK5EuGqcBsWOIlb78zvPrv0VpyqLRj3rDuXUkVlVywMNv0u+rL+KiyUZ?=
 =?iso-8859-1?Q?3t2XYuSF3eoDwdc5wVSoF1pbYNtRKI51DV8S+4fmovZ7MZvuPxwuO1OHWj?=
 =?iso-8859-1?Q?wulfhCdnovPgY4AAXtqRA6qajdh9ikQW5n8wbHeRZ6u+3ovM65dlh7h9jP?=
 =?iso-8859-1?Q?7kftupQR4hWOtipzkpWA=3D=3D?=
Content-Type: multipart/alternative;
 boundary="_000_SJ1P223MB0531D7D62140F0516A25897AA1439SJ1P223MB0531NAMP_"
MIME-Version: 1.0
X-OriginatorOrg: sct-15-20-4755-11-msonline-outlook-1ff67.templateTenant
X-MS-Exchange-CrossTenant-AuthAs: Internal
X-MS-Exchange-CrossTenant-AuthSource: SJ1P223MB0531.NAMP223.PROD.OUTLOOK.COM
X-MS-Exchange-CrossTenant-RMS-PersistedConsumerOrg: 00000000-0000-0000-0000-000000000000
X-MS-Exchange-CrossTenant-Network-Message-Id: c3341e10-8820-4411-bc16-08db5b1720fc
X-MS-Exchange-CrossTenant-originalarrivaltime: 22 May 2023 22:51:49.8528 (UTC)
X-MS-Exchange-CrossTenant-fromentityheader: Hosted
X-MS-Exchange-CrossTenant-id: 84df9e7f-e9f6-40af-b435-aaaaaaaaaaaa
X-MS-Exchange-CrossTenant-rms-persistedconsumerorg: 00000000-0000-0000-0000-000000000000
X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH7P223MB0550
X-Mailman-Approved-At: Mon, 22 May 2023 22:53:07 +0000
Subject: Re: [bitcoin-dev] Coinjoin with less steps using ALL|ANYONECANPAY
X-BeenThere: bitcoin-dev@lists.linuxfoundation.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: Bitcoin Protocol Discussion <bitcoin-dev.lists.linuxfoundation.org>
List-Unsubscribe: <https://lists.linuxfoundation.org/mailman/options/bitcoin-dev>, 
 <mailto:bitcoin-dev-request@lists.linuxfoundation.org?subject=unsubscribe>
List-Archive: <http://lists.linuxfoundation.org/pipermail/bitcoin-dev/>
List-Post: <mailto:bitcoin-dev@lists.linuxfoundation.org>
List-Help: <mailto:bitcoin-dev-request@lists.linuxfoundation.org?subject=help>
List-Subscribe: <https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev>, 
 <mailto:bitcoin-dev-request@lists.linuxfoundation.org?subject=subscribe>
X-List-Received-Date: Mon, 22 May 2023 22:51:53 -0000

--_000_SJ1P223MB0531D7D62140F0516A25897AA1439SJ1P223MB0531NAMP_
Content-Type: text/plain; charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable

The problem with using ALL|ANYONECANPAY is that you cannot verify beforehan=
d that the other inputs are the inputs you want added to the transaction.

Some examples of bad things that could happen:


  *   Coordinator adds its own inputs, you still get your outputs but effec=
tively paid fees for no privacy gain
  *   The inputs added could be paying at a lower fee rate than expected, c=
ausing the tx to take longer than what you paid for
  *   Different input types or amount are added so you no longer have the s=
ame uniformity across the inputs
  *   (if you care) An input from a sanctioned address is added, causing yo=
u to get "tainted" coins.

This is the code in ln-vortex that verifies the psbt on the client side if =
you are curious

https://github.com/ln-vortex/ln-vortex/blob/master/client/src/main/scala/co=
m/lnvortex/client/VortexClient.scala#L616


Best,

benthecarman

________________________________
From: bitcoin-dev <bitcoin-dev-bounces@lists.linuxfoundation.org> on behalf=
 of alicexbt via bitcoin-dev <bitcoin-dev@lists.linuxfoundation.org>
Sent: Monday, May 22, 2023 7:51 AM
To: Bitcoin Protocol Discussion <bitcoin-dev@lists.linuxfoundation.org>
Subject: [bitcoin-dev] Coinjoin with less steps using ALL|ANYONECANPAY

Hi Bitcoin Developers,

I recently experimented with different sighash flags, PSBTs and realized AL=
L|ANYONECANPAY could be used to reduce some steps in coinjoin.

Steps:

- Register outputs.
- One user creates a signed PSBT with 1 input, all registered outputs and A=
LL|ANYONECANPAY sighash flag. Other participants keep adding their inputs t=
o PSBT.
- Finalize and broadcast the transaction.

Proof of Concept (Aice and Bob): https://gitlab.com/-/snippets/2542297

Tx: https://mempool.space/testnet/tx/c6dd626591dca7e25bbd516f01b23171eb0f2b=
623471fcf8e073c87c1179c492

I plan to use this in joinstr if there are no major drawbacks and it can ev=
en be implemented by other coinjoin implementations.

/dev/fd0
floppy disk guy

Sent with Proton Mail secure email.
_______________________________________________
bitcoin-dev mailing list
bitcoin-dev@lists.linuxfoundation.org
https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev

--_000_SJ1P223MB0531D7D62140F0516A25897AA1439SJ1P223MB0531NAMP_
Content-Type: text/html; charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable

<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Diso-8859-=
1">
<style type=3D"text/css" style=3D"display:none;"> P {margin-top:0;margin-bo=
ttom:0;} </style>
</head>
<body dir=3D"ltr">
<div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;=
 color: rgb(0, 0, 0);" class=3D"elementToProof ContentPasted0">
The problem with using ALL|ANYONECANPAY is that you cannot verify beforehan=
d that the other inputs are the inputs you want added to the transaction.</=
div>
<div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;=
 color: rgb(0, 0, 0);" class=3D"elementToProof ContentPasted0">
<br>
</div>
<div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;=
 color: rgb(0, 0, 0);" class=3D"elementToProof ContentPasted0">
Some examples of bad things that could happen:</div>
<div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;=
 color: rgb(0, 0, 0);" class=3D"elementToProof ContentPasted0">
<br>
</div>
<div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;=
 color: rgb(0, 0, 0);" class=3D"elementToProof ContentPasted0">
<ul data-editing-info=3D"{&quot;orderedStyleType&quot;:1,&quot;unorderedSty=
leType&quot;:2}">
<li style=3D"list-style-type: &quot;- &quot;;"><span>Coordinator adds its o=
wn inputs, you still get your outputs but effectively paid fees for no priv=
acy gain</span></li><li style=3D"list-style-type: &quot;- &quot;;"><span>Th=
e inputs added could be paying at a lower fee rate than expected, causing t=
he tx to take longer than what you paid for</span></li><li style=3D"list-st=
yle-type: &quot;- &quot;;"><span>Different input types or amount are added =
so you no longer have the same uniformity across the inputs</span></li><li =
style=3D"list-style-type: &quot;- &quot;;"><span>(if you care) An input fro=
m a sanctioned address is added, causing you to get &quot;tainted&quot; coi=
ns.<br>
</span></li></ul>
</div>
<div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;=
 color: rgb(0, 0, 0);" class=3D"elementToProof ContentPasted0 ContentPasted=
1">
This is the code in ln-vortex that verifies the psbt on the client side if =
you are curious<br>
<br>
<a href=3D"https://github.com/ln-vortex/ln-vortex/blob/master/client/src/ma=
in/scala/com/lnvortex/client/VortexClient.scala#L616" id=3D"LPNoLPOWALinkPr=
eview">https://github.com/ln-vortex/ln-vortex/blob/master/client/src/main/s=
cala/com/lnvortex/client/VortexClient.scala#L616</a>
<div class=3D"_Entity _EType_OWALinkPreview _EId_OWALinkPreview _EReadonly_=
1"></div>
<br>
</div>
<div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;=
 color: rgb(0, 0, 0);" class=3D"elementToProof ContentPasted0 ContentPasted=
1">
<br>
</div>
<div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;=
 color: rgb(0, 0, 0);" class=3D"elementToProof ContentPasted0 ContentPasted=
1">
Best,</div>
<div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;=
 color: rgb(0, 0, 0);" class=3D"elementToProof ContentPasted0 ContentPasted=
1">
<br>
</div>
<div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;=
 color: rgb(0, 0, 0);" class=3D"elementToProof ContentPasted0 ContentPasted=
1">
benthecarman<br>
</div>
<div id=3D"appendonsend"></div>
<div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;=
 color: rgb(0, 0, 0);">
<br>
</div>
<hr tabindex=3D"-1" style=3D"display:inline-block; width:98%">
<div id=3D"divRplyFwdMsg" dir=3D"ltr"><font style=3D"font-size: 11pt; color=
: rgb(0, 0, 0);" face=3D"Calibri, sans-serif"><b>From:</b> bitcoin-dev &lt;=
bitcoin-dev-bounces@lists.linuxfoundation.org&gt; on behalf of alicexbt via=
 bitcoin-dev &lt;bitcoin-dev@lists.linuxfoundation.org&gt;<br>
<b>Sent:</b> Monday, May 22, 2023 7:51 AM<br>
<b>To:</b> Bitcoin Protocol Discussion &lt;bitcoin-dev@lists.linuxfoundatio=
n.org&gt;<br>
<b>Subject:</b> [bitcoin-dev] Coinjoin with less steps using ALL|ANYONECANP=
AY</font>
<div>&nbsp;</div>
</div>
<div class=3D"BodyFragment"><font size=3D"2"><span style=3D"font-size:11pt"=
>
<div class=3D"PlainText">Hi Bitcoin Developers,<br>
<br>
I recently experimented with different sighash flags, PSBTs and realized AL=
L|ANYONECANPAY could be used to reduce some steps in coinjoin.<br>
<br>
Steps:<br>
<br>
- Register outputs.<br>
- One user creates a signed PSBT with 1 input, all registered outputs and A=
LL|ANYONECANPAY sighash flag. Other participants keep adding their inputs t=
o PSBT.<br>
- Finalize and broadcast the transaction.<br>
<br>
Proof of Concept (Aice and Bob):&nbsp;<a href=3D"https://gitlab.com/-/snipp=
ets/2542297" data-auth=3D"NotApplicable">https://gitlab.com/-/snippets/2542=
297</a><br>
<br>
Tx: <a href=3D"https://mempool.space/testnet/tx/c6dd626591dca7e25bbd516f01b=
23171eb0f2b623471fcf8e073c87c1179c492" data-auth=3D"NotApplicable">
https://mempool.space/testnet/tx/c6dd626591dca7e25bbd516f01b23171eb0f2b6234=
71fcf8e073c87c1179c492</a><br>
<br>
I plan to use this in joinstr if there are no major drawbacks and it can ev=
en be implemented by other coinjoin implementations.
<br>
<br>
/dev/fd0<br>
floppy disk guy<br>
<br>
Sent with Proton Mail secure email.<br>
_______________________________________________<br>
bitcoin-dev mailing list<br>
bitcoin-dev@lists.linuxfoundation.org<br>
<a href=3D"https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev" =
data-auth=3D"NotApplicable">https://lists.linuxfoundation.org/mailman/listi=
nfo/bitcoin-dev</a><br>
</div>
</span></font></div>
</body>
</html>

--_000_SJ1P223MB0531D7D62140F0516A25897AA1439SJ1P223MB0531NAMP_--