📅 Original date posted:2013-05-15
📝 Original message:-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
You can do this right now, with Armory. If you switch Armory to Expert
usermode, you can combine coin-control with unsigned transactions to do
exactly this. It's because Armory doesn't "lock" coins used in previous
unsigned transactions, until they're actually broadcast and confirmed to
be "out in the wild". This was done for simplicity to avoid people
getting arbitrarily-locked coins, even though it means you end up
accidentally double-spending if you try to create two different unsigned
transactions from the same wallet without sign&broadcasting the first one.
So here's what you do:
(1) Switch to "Expert" usermode in Armory
(2) Open any wallet (you don't need a watch-only wallet, full wallet is
fine)
(3) In the "Send Bitcoins" window, click coin-control
(4) Create a transaction using one sufficiently large input
(5) Click "Create Unsigned Transaction" and save it
(6) Repeat 3-5 with the same coin, but sending to yourself, specify a
larger fee
(7) Go into "Offline Transactions" and "Sign and Broadcast Transactions"
(8) Load tx1, sign & broadcast
(9) Load tx2, sign & broadcast
This only works if your Bitcoin-Qt/bitcoind client has the
replace-by-fee patch, since Armory uses Bitcoin-Qt/bitcoind as a gateway
to the network. Otherwise, the second tx will be DOA. But you don't
have to mess with Armory other than switching it to Expert mode to get
to the coin-control feature.
- -Alan
P.S. -- If you try this, Armory is likely to not show the second tx as
having ever happened (Bitcoin-Qt will send it back to us and we ignore
it because we already have a tx). But if your Bitcoin node has the
modification, it /will/ reach the network
On 05/15/2013 08:19 AM, Peter Todd wrote:
> On Wed, May 15, 2013 at 07:38:27AM -0400, Peter Todd wrote:
>> So I'm offering 2BTC for anyone who comes up with a nice and easy to use
>> command line tool that lets you automagically create one version of the
>> transaction sending the coins to the desired recipient, and another
>> version sending all the coins back to you, both with the same
>> transaction inputs. In addition to creating the two versions, you need
>> to find a way to broadcast them both simultaneously to different nodes
>> on the network. One clever approach might be to use blockchain.info's
>> raw transaction POST API, and your local Bitcoin node.
>
> Oh, and while we're at it, a good starting point for your work would be
> Gavin's spendfrom utility in the contrib/spendfrom directory in the
> Bitcoin-QT respository.
>
> Also please do keep in mind that it's much better for the community if
> an attack is demonstrated first, followed by releasing the code some
> time later.
>
>
>
>
------------------------------------------------------------------------------
> AlienVault Unified Security Management (USM) platform delivers complete
> security visibility with the essential security capabilities. Easily and
> efficiently configure, manage, and operate all of your security controls
> from a single console and one unified framework. Download a free trial.
> http://p.sf.net/sfu/alienvault_d2d
>
>
> _______________________________________________
> Bitcoin-development mailing list
> Bitcoin-development at lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/bitcoin-development
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.11 (GNU/Linux)
Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/
iQIcBAEBAgAGBQJRk441AAoJEBHe6b77WWmFZNQP/02t6cQkhih/CcA1oSCM72np
KMRW0Z+piHShORxLyhMX3cIpi3ICJ2lJ/Pm6GfDn74oSHq8wipIFoV88xhy810bL
MnJtbPH900v8PHh/ji2nWMig9NibeUa1zV9/tp31rYjUT3mmMoC4yQlyxKII8GWK
iignkAHV/UL5kQGmhmr1RKN127cthSMeIzAYWXfIWVObPNm85pvizVZdgqzSK73h
vwdfeFOelNbVn8ZCNT19OsxWfAKZSaBMywAX95wQBs0BtY2ZgDRmeXa6MdQKpXGW
KP3O2zjjJC2CKc4+L6elMfsoL1doEsk35w/GuI4HZK4MLAI8BChi6ZPnAYjdRvir
eHeszyxkKDCEaJ9JPLA/AszqkYHIB+56wTtrpVb1duyTwuqgVT5dcpMPIH8bDqjq
k3I8C9zCSeQ6JgyvOd8grKJchRtq0SOWYt2bB3ytePzwOs+W+6mRenb/WtMt2dQg
ntDTEIG7pCsWHenipeTBzvJNqeSsAAoIXnkGY20iDxCB+uFkTzisoCQqpOIglArm
vD+Cl2nv3OKU3NTVTUt2VinoFskezI7xvsxHD8xs2V/hrlpPbPRAo+l7ER6aTazj
wrONfmllHSE2XCM7wb/bX3gBNmsM3zUIgSBmNSH/SQeTy8PvwvlkZ/RRYmtVSmHL
rUTp7x4U63JiIDO1jj+T
=JiPo
-----END PGP SIGNATURE-----
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.linuxfoundation.org/pipermail/bitcoin-dev/attachments/20130515/9f78f5e6/attachment.html>;
Alan Reiner [ARCHIVE] /
npub1sm…mnq7h
2023-06-07 15:02:00
in reply to nevent1q…hpp0
Author Public Key
npub1sm6zhjmk5scuz294jmpkw99wwwjzetjgwp4fu4gn6utqgdz87hkqamnq7hPublished at
2023-06-07 15:02:00Event JSON
{
"id": "8327f0e75e60112ef941d369da041e629fe1c9d2ad49969d96b4e5a23b9ba379",
"pubkey": "86f42bcb76a431c128b596c36714ae73a42cae48706a9e5513d716043447f5ec",
"created_at": 1686150120,
"kind": 1,
"tags": [
[
"e",
"00c890275f8d4137fac209cf841828c0917e35ed719b27a621f145f14e5ad4bd",
"",
"root"
],
[
"e",
"9bed6bbadedc47bf3ced469e17d6fbc9818f5e8061414e23a4074d6458718ad9",
"",
"reply"
],
[
"p",
"daa2fc676a25e3b5b45644540bcbd1e1168b111427cd0e3cf19c56194fb231aa"
]
],
"content": "📅 Original date posted:2013-05-15\n📝 Original message:-----BEGIN PGP SIGNED MESSAGE-----\nHash: SHA1\n\nYou can do this right now, with Armory. If you switch Armory to Expert\nusermode, you can combine coin-control with unsigned transactions to do\nexactly this. It's because Armory doesn't \"lock\" coins used in previous\nunsigned transactions, until they're actually broadcast and confirmed to\nbe \"out in the wild\". This was done for simplicity to avoid people\ngetting arbitrarily-locked coins, even though it means you end up\naccidentally double-spending if you try to create two different unsigned\ntransactions from the same wallet without sign\u0026broadcasting the first one.\n\nSo here's what you do:\n(1) Switch to \"Expert\" usermode in Armory\n(2) Open any wallet (you don't need a watch-only wallet, full wallet is\nfine)\n(3) In the \"Send Bitcoins\" window, click coin-control\n(4) Create a transaction using one sufficiently large input\n(5) Click \"Create Unsigned Transaction\" and save it\n(6) Repeat 3-5 with the same coin, but sending to yourself, specify a\nlarger fee\n(7) Go into \"Offline Transactions\" and \"Sign and Broadcast Transactions\"\n(8) Load tx1, sign \u0026 broadcast\n(9) Load tx2, sign \u0026 broadcast\n\nThis only works if your Bitcoin-Qt/bitcoind client has the\nreplace-by-fee patch, since Armory uses Bitcoin-Qt/bitcoind as a gateway\nto the network. Otherwise, the second tx will be DOA. But you don't\nhave to mess with Armory other than switching it to Expert mode to get\nto the coin-control feature.\n\n- -Alan\n\nP.S. -- If you try this, Armory is likely to not show the second tx as\nhaving ever happened (Bitcoin-Qt will send it back to us and we ignore\nit because we already have a tx). But if your Bitcoin node has the\nmodification, it /will/ reach the network\n\n\nOn 05/15/2013 08:19 AM, Peter Todd wrote:\n\u003e On Wed, May 15, 2013 at 07:38:27AM -0400, Peter Todd wrote:\n\u003e\u003e So I'm offering 2BTC for anyone who comes up with a nice and easy to use\n\u003e\u003e command line tool that lets you automagically create one version of the\n\u003e\u003e transaction sending the coins to the desired recipient, and another\n\u003e\u003e version sending all the coins back to you, both with the same\n\u003e\u003e transaction inputs. In addition to creating the two versions, you need\n\u003e\u003e to find a way to broadcast them both simultaneously to different nodes\n\u003e\u003e on the network. One clever approach might be to use blockchain.info's\n\u003e\u003e raw transaction POST API, and your local Bitcoin node.\n\u003e\n\u003e Oh, and while we're at it, a good starting point for your work would be\n\u003e Gavin's spendfrom utility in the contrib/spendfrom directory in the\n\u003e Bitcoin-QT respository.\n\u003e\n\u003e Also please do keep in mind that it's much better for the community if\n\u003e an attack is demonstrated first, followed by releasing the code some\n\u003e time later.\n\u003e\n\u003e\n\u003e\n\u003e\n------------------------------------------------------------------------------\n\u003e AlienVault Unified Security Management (USM) platform delivers complete\n\u003e security visibility with the essential security capabilities. Easily and\n\u003e efficiently configure, manage, and operate all of your security controls\n\u003e from a single console and one unified framework. Download a free trial.\n\u003e http://p.sf.net/sfu/alienvault_d2d\n\u003e\n\u003e\n\u003e _______________________________________________\n\u003e Bitcoin-development mailing list\n\u003e Bitcoin-development at lists.sourceforge.net\n\u003e https://lists.sourceforge.net/lists/listinfo/bitcoin-development\n\n-----BEGIN PGP SIGNATURE-----\nVersion: GnuPG v1.4.11 (GNU/Linux)\nComment: Using GnuPG with Thunderbird - http://www.enigmail.net/\n\niQIcBAEBAgAGBQJRk441AAoJEBHe6b77WWmFZNQP/02t6cQkhih/CcA1oSCM72np\nKMRW0Z+piHShORxLyhMX3cIpi3ICJ2lJ/Pm6GfDn74oSHq8wipIFoV88xhy810bL\nMnJtbPH900v8PHh/ji2nWMig9NibeUa1zV9/tp31rYjUT3mmMoC4yQlyxKII8GWK\niignkAHV/UL5kQGmhmr1RKN127cthSMeIzAYWXfIWVObPNm85pvizVZdgqzSK73h\nvwdfeFOelNbVn8ZCNT19OsxWfAKZSaBMywAX95wQBs0BtY2ZgDRmeXa6MdQKpXGW\nKP3O2zjjJC2CKc4+L6elMfsoL1doEsk35w/GuI4HZK4MLAI8BChi6ZPnAYjdRvir\neHeszyxkKDCEaJ9JPLA/AszqkYHIB+56wTtrpVb1duyTwuqgVT5dcpMPIH8bDqjq\nk3I8C9zCSeQ6JgyvOd8grKJchRtq0SOWYt2bB3ytePzwOs+W+6mRenb/WtMt2dQg\nntDTEIG7pCsWHenipeTBzvJNqeSsAAoIXnkGY20iDxCB+uFkTzisoCQqpOIglArm\nvD+Cl2nv3OKU3NTVTUt2VinoFskezI7xvsxHD8xs2V/hrlpPbPRAo+l7ER6aTazj\nwrONfmllHSE2XCM7wb/bX3gBNmsM3zUIgSBmNSH/SQeTy8PvwvlkZ/RRYmtVSmHL\nrUTp7x4U63JiIDO1jj+T\n=JiPo\n-----END PGP SIGNATURE-----\n\n-------------- next part --------------\nAn HTML attachment was scrubbed...\nURL: \u003chttp://lists.linuxfoundation.org/pipermail/bitcoin-dev/attachments/20130515/9f78f5e6/attachment.html\u003e",
"sig": "52dc3f9c30b0dc8d80a660442c4758d32c0d3661d823ea343a449c2a83a2ec82a9b3ea412877c8c4dfb8da8cbf2dc48c2c1feb1a1205387d51ba7d916b8012f8"
}