[Bitcoin-development] Bug in 2-of-3 transaction signing in Bitcoind?
For the life of me, I cannot figure out what's wrong with this. It seems like
Bitcoind has lost its mind. I'm trying to redeem a 2-of-3 multisig P2SH output
using a raw transaction.
Here's the address that the P2SH output was sent to:
$ bitcoind createmultisig 2
'[03566474f987a012a69a08097253394ebd681454df29c3f1fb0495a5b45490f928,
03927407ca158155d0d30366395ca9cdc7d93cfa0a5b22181374431c15aae7b358,
02cff98aba464f5d4ebac5e6417f142326235f5a0a59708ba6231471cce4ee0747]'
{
address : 33snuCcVUmn9iBG345keJRzMfVwz7Uo87C,
redeemScript :
522103566474f987a012a69a08097253394ebd681454df29c3f1fb0495a5b45490f9282103927407ca158155d0d30366395ca9cdc7d93cfa0a5b22181374431c15aae7b3582102cff98aba464f5d4ebac5e6417f142326235f5a0a59708ba6231471cce4ee074753ae
}
The transaction containing the output is
ec7d985ae265a3a79c68d852e0e52cf4177c3362d7a25fb718be82f980f39285. It's the
second output.
So I ask Bitcoind to create a raw transaction to spend the output:
$ bitcoind createrawtransaction
'[{txid:ec7d985ae265a3a79c68d852e0e52cf4177c3362d7a25fb718be82f980f39285,
vout:1}]' '{19YNEu4ZqX3nU9rJMuMcDy3pzFhactZPmk:0.0005,
1J2qtR7HBbE4rkNAgZCo4hZUEd2Z4jtSgz:0.0004}'
0100018592f380f982be18b75fa2d762337c17f42ce5e052d8689ca7a365e25a987dec010250c31976a9145dafa18ab21debe3d20f2c39e88d630f822bd29e88ac409c1976a914bad35cd767b657daa4a735b32e3d1f1dab52872d88ac
And here is the decoded transaction, for completeness:
$ bitcoind decoderawtransaction
0100018592f380f982be18b75fa2d762337c17f42ce5e052d8689ca7a365e25a987dec010250c31976a9145dafa18ab21debe3d20f2c39e88d630f822bd29e88ac409c1976a914bad35cd767b657daa4a735b32e3d1f1dab52872d88ac
{
txid : 8d731e6e333d805f6c8b569e1a608d14127d61d3123b699355133b2c757c16fb,
version : 1,
locktime : 0,
vin : [
{
txid :
ec7d985ae265a3a79c68d852e0e52cf4177c3362d7a25fb718be82f980f39285,
vout : 1,
scriptSig : {
asm : ,
hex :
},
sequence : 4294967295
}
],
vout : [
{
value : 0.0005,
n : 0,
scriptPubKey : {
asm : OP_DUP OP_HASH160
5dafa18ab21debe3d20f2c39e88d630f822bd29e OP_EQUALVERIFY OP_CHECKSIG,
hex : 76a9145dafa18ab21debe3d20f2c39e88d630f822bd29e88ac,
reqSigs : 1,
type : pubkeyhash,
addresses : [
19YNEu4ZqX3nU9rJMuMcDy3pzFhactZPmk
]
}
},
{
value : 0.0004,
n : 1,
scriptPubKey : {
asm : OP_DUP OP_HASH160
bad35cd767b657daa4a735b32e3d1f1dab52872d OP_EQUALVERIFY OP_CHECKSIG,
hex : 76a914bad35cd767b657daa4a735b32e3d1f1dab52872d88ac,
reqSigs : 1,
type : pubkeyhash,
addresses : [
1J2qtR7HBbE4rkNAgZCo4hZUEd2Z4jtSgz
]
}
}
]
}
Now I'll sign the transaction with 2 of 3 keys:
$ bitcoind signrawtransaction
0100018592f380f982be18b75fa2d762337c17f42ce5e052d8689ca7a365e25a987dec010250c31976a9145dafa18ab21debe3d20f2c39e88d630f822bd29e88ac409c1976a914bad35cd767b657daa4a735b32e3d1f1dab52872d88ac
'[{txid:ec7d985ae265a3a79c68d852e0e52cf4177c3362d7a25fb718be82f980f39285,
vout:1, scriptPubKey:a91417f9f4ba5c2f2b9334805f91bbbf90a19aaa3d5687,
redeemScript:522103566474f987a012a69a08097253394ebd681454df29c3f1fb0495a5b45490f9282103927407ca158155d0d30366395ca9cdc7d93cfa0a5b22181374431c15aae7b3582102cff98aba464f5d4ebac5e6417f142326235f5a0a59708ba6231471cce4ee074753ae}]'
'[Ky7EQeg71YHeftLc31tt8AoNSezFEgUCbvwYak1eKksg6gQww6FF,
KxAXrjTMZJN1Egqkckdz9TXyB2kyJ68wu7CiJk6Rygmr9zv2nScG]'
{
hex :
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,
complete : true
}
And here's the decode of the signed transaction:
$ bitcoind decoderawtransaction
Re: [Bitcoin-development] Bug in 2-of-3 transaction signing in Bitcoind?
The first input seems to be already spent by another transaction (which looks very similar). 0.9 should report a more detailed reason for rejection, by the way. On Tue, Apr 15, 2014 at 5:05 PM, Mike Hearn m...@plan99.net wrote: Check debug.log to find out the reason it was rejected. -- Learn Graph Databases - Download FREE O'Reilly Book Graph Databases is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/NeoTech ___ Bitcoin-development mailing list Bitcoin-development@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bitcoin-development -- Learn Graph Databases - Download FREE O'Reilly Book Graph Databases is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/NeoTech ___ Bitcoin-development mailing list Bitcoin-development@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bitcoin-development
Re: [Bitcoin-development] Bug in 2-of-3 transaction signing in Bitcoind?
Thanks for the quick reply to both of you, Mike and Pieter. I feel foolish for posting to this list, because the debug.log does indeed say inputs already spent. That's so weird, though, because we haven't been able to get anything to accept the transaction, seemingly, and yet it was accepted into the block chain 15 blocks ago. Anyway, I'm sorry for the noise. On Tuesday, 15 April 2014, at 5:11 pm, Pieter Wuille wrote: The first input seems to be already spent by another transaction (which looks very similar). 0.9 should report a more detailed reason for rejection, by the way. On Tue, Apr 15, 2014 at 5:05 PM, Mike Hearn m...@plan99.net wrote: Check debug.log to find out the reason it was rejected. -- Learn Graph Databases - Download FREE O'Reilly Book Graph Databases is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/NeoTech ___ Bitcoin-development mailing list Bitcoin-development@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bitcoin-development -- Learn Graph Databases - Download FREE O'Reilly Book Graph Databases is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/NeoTech ___ Bitcoin-development mailing list Bitcoin-development@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bitcoin-development
Re: [Bitcoin-development] Bug in 2-of-3 transaction signing in Bitcoind?
That's so weird, though, because we haven't been able to get anything to accept the transaction, seemingly, and yet it was accepted into the block chain 15 blocks ago. If the tx is already in the block chain then it won't be accepted again, because it would be double spending itself! -- Learn Graph Databases - Download FREE O'Reilly Book Graph Databases is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/NeoTech___ Bitcoin-development mailing list Bitcoin-development@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bitcoin-development
Re: [Bitcoin-development] Bug in 2-of-3 transaction signing in Bitcoind?
For what it is worth, I found btcd (the go implementation of bitcoind) has much better error/diagnostics messages. It would have given you more than -22 TX Rejected. I used it to debug my own multi-sig transactions and it was very helpful. Mike On Tue, Apr 15, 2014 at 8:42 AM, Matt Whitlock b...@mattwhitlock.namewrote: On Tuesday, 15 April 2014, at 5:30 pm, Mike Hearn wrote: That's so weird, though, because we haven't been able to get anything to accept the transaction, seemingly, and yet it was accepted into the block chain 15 blocks ago. If the tx is already in the block chain then it won't be accepted again, because it would be double spending itself! Haha, yes, I know that. But we had been trying to get a 2-of-3 to be accepted by something for hours, and everything was rejecting it: Coinb.in, our local Bitcoind, the Eligius tx push form. Evidently something did accept it and we didn't notice. We're starting over again now and trying to reproduce the success (or failure). -- Learn Graph Databases - Download FREE O'Reilly Book Graph Databases is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/NeoTech ___ Bitcoin-development mailing list Bitcoin-development@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bitcoin-development -- Learn Graph Databases - Download FREE O'Reilly Book Graph Databases is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/NeoTech___ Bitcoin-development mailing list Bitcoin-development@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bitcoin-development
Re: [Bitcoin-development] Bug in 2-of-3 transaction signing in Bitcoind?
On Tuesday, 15 April 2014, at 5:30 pm, Mike Hearn wrote: That's so weird, though, because we haven't been able to get anything to accept the transaction, seemingly, and yet it was accepted into the block chain 15 blocks ago. If the tx is already in the block chain then it won't be accepted again, because it would be double spending itself! Haha, yes, I know that. But we had been trying to get a 2-of-3 to be accepted by something for hours, and everything was rejecting it: Coinb.in, our local Bitcoind, the Eligius tx push form. Evidently something did accept it and we didn't notice. We're starting over again now and trying to reproduce the success (or failure). -- Learn Graph Databases - Download FREE O'Reilly Book Graph Databases is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/NeoTech ___ Bitcoin-development mailing list Bitcoin-development@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bitcoin-development
Re: [Bitcoin-development] Bug in 2-of-3 transaction signing in Bitcoind?
On Tuesday, 15 April 2014, at 8:47 am, Mike Belshe wrote:
For what it is worth, I found btcd (the go implementation of bitcoind) has
much better error/diagnostics messages. It would have given you more than
-22 TX Rejected. I used it to debug my own multi-sig transactions and it
was very helpful.
I'll have to check that out.
A follow-up on my initial post... I did just successfully create, sign, and
transmit another 2-of-3 transaction, so once again, I'm sorry I bothered this
list. But since I did (and am now doing so again), I'll give a little more
background on what we've been up to. It's not quite as simple as what I've
shared thus far.
We have built a tool from scratch in C++ that is kind of a Swiss Army knife of
Bitcoin. It does all sorts of key and address conversions, hash functions,
encoding and decoding, script disassembly, BIP38 encryption/decrytion, the
Shamir Secret Sharing that I've posted about here on this list before, and
transaction building and signing. It has its own wallet and it's own UTXO cache
that contains only TXOs that are relevant to the objects in its wallet. It
synchronizes its cache by scanning bitcoind's block data files. (It memory maps
them and can do a full scan of the entire block chain in about a minute!) The
wallet can contain keys, seeds, and multi-signature aggregates (which in turn
can comprise keys and seeds). What we've been testing is deriving sequences of
multi-sig P2SH addresses from a set of public seeds, sending bitcoins to those
addresses, then using our tool to find those outputs in the block chain and to
create transactions that redeem them, and then signing those trans
actions by supplying the private seeds to the tool.
Our tool is quite a bit easier to use than Bitcoind. (I was frankly appalled at
the command-line syntax that was necessary to get Bitcoind to sign a P2SH
multi-sig transaction.)
$ ./btctool privkey /dev/random privseed1
$ ./btctool privkey /dev/random privseed2
$ ./btctool privkey /dev/random privseed3
$ pubseed1=$(./btctool pubkey privseed1)
$ pubseed2=$(./btctool pubkey privseed2)
$ pubseed3=$(./btctool pubkey privseed3)
$ ./chaintool init
$ ./chaintool add demo 2 :${pubseed1} :${pubseed2} :${pubseed3}
$ ./chaintool ls
demo2 :036447c7edc861b9f41fa0f611d81784f19ce692f37e8772b55c37c743cd526b49
:03c831711ea65decc06b0f3ccb4b9f1ba1a99a6933e520f6e7e4c3dbb4f015b701
:0347f2a0a346f21538fc451b95a600bc64ce5d2d28b89bf547697f3a77195d8dd1
$ ./btctool addresses 1 2 ${pubseed1} ${pubseed2} ${pubseed3}
3GQd1tosFCE7Vo4TAiDHEKTaBgoyZTeL6R
$ bitcoind sendtoaddress 3GQd1tosFCE7Vo4TAiDHEKTaBgoyZTeL6R 0.01
6a9538f496f4c2d7f50c342fa6f6f76904a3b19f55f3a54a0003fc00b327d81b
(I waited here for the tx to get into a block)
$ ./chaintool sync /var/lib/bitcoin/.bitcoin/blocks 2 /dev/null
$ ./chaintool listunspent
[
{
txid:
6a9538f496f4c2d7f50c342fa6f6f76904a3b19f55f3a54a0003fc00b327d81b,
vout: 1,
address: 3GQd1tosFCE7Vo4TAiDHEKTaBgoyZTeL6R,
scriptPubKey:
a914a1701be36532f05a74511fca89afce180c58189587,
amount: 100,
confirmations: 1
}
]
$ cat outputs EOF
13QAKNuh9uFcEiNAsct6LSF1qWQR6HLarT 5
1FV4Fm3VCXfWy7BAXzT8t5qqTvEKZSad9v
EOF
$ tx=$(./chaintool createtx 1 demo outputs)
(I manually edited ${tx} at this point to add an OP_RETURN output. We're
currently working toward using OP_RETURN in a provable solvency scheme.)
$ signedtx1=$(./chaintool signtx ${tx} privseed1)
input #0: need 1 of
[:03c831711ea65decc06b0f3ccb4b9f1ba1a99a6933e520f6e7e4c3dbb4f015b701,
:0347f2a0a346f21538fc451b95a600bc64ce5d2d28b89bf547697f3a77195d8dd1]
$ signedtx2=$(./chaintool signtx ${signedtx1} privseed2)
$ bitcoind sendrawtransaction ${signedtx2}
b485b185c77d803f75e1ccfee1b5072846c9e0728f4c955ca40dce82263f8f16
$ exit
:-)
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applications. Written by three acclaimed leaders in the field,
this first edition is now available. Download your free book today!
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Re: [Bitcoin-development] Bug in 2-of-3 transaction signing in Bitcoind?
Hi Matt,
Looks interesting. Is the source available?
On Apr 15, 2014, at 6:27 PM, Matt Whitlock b...@mattwhitlock.name wrote:
On Tuesday, 15 April 2014, at 8:47 am, Mike Belshe wrote:
For what it is worth, I found btcd (the go implementation of bitcoind) has
much better error/diagnostics messages. It would have given you more than
-22 TX Rejected. I used it to debug my own multi-sig transactions and it
was very helpful.
I'll have to check that out.
A follow-up on my initial post... I did just successfully create, sign, and
transmit another 2-of-3 transaction, so once again, I'm sorry I bothered this
list. But since I did (and am now doing so again), I'll give a little more
background on what we've been up to. It's not quite as simple as what I've
shared thus far.
We have built a tool from scratch in C++ that is kind of a Swiss Army knife of
Bitcoin. It does all sorts of key and address conversions, hash functions,
encoding and decoding, script disassembly, BIP38 encryption/decrytion, the
Shamir Secret Sharing that I've posted about here on this list before, and
transaction building and signing. It has its own wallet and it's own UTXO cache
that contains only TXOs that are relevant to the objects in its wallet. It
synchronizes its cache by scanning bitcoind's block data files. (It memory maps
them and can do a full scan of the entire block chain in about a minute!) The
wallet can contain keys, seeds, and multi-signature aggregates (which in turn
can comprise keys and seeds). What we've been testing is deriving sequences of
multi-sig P2SH addresses from a set of public seeds, sending bitcoins to those
addresses, then using our tool to find those outputs in the block chain and to
create transactions that redeem them, and then signing those trans
actions by supplying the private seeds to the tool.
Our tool is quite a bit easier to use than Bitcoind. (I was frankly appalled at
the command-line syntax that was necessary to get Bitcoind to sign a P2SH
multi-sig transaction.)
$ ./btctool privkey /dev/random privseed1
$ ./btctool privkey /dev/random privseed2
$ ./btctool privkey /dev/random privseed3
$ pubseed1=$(./btctool pubkey privseed1)
$ pubseed2=$(./btctool pubkey privseed2)
$ pubseed3=$(./btctool pubkey privseed3)
$ ./chaintool init
$ ./chaintool add demo 2 :${pubseed1} :${pubseed2} :${pubseed3}
$ ./chaintool ls
demo2 :036447c7edc861b9f41fa0f611d81784f19ce692f37e8772b55c37c743cd526b49
:03c831711ea65decc06b0f3ccb4b9f1ba1a99a6933e520f6e7e4c3dbb4f015b701
:0347f2a0a346f21538fc451b95a600bc64ce5d2d28b89bf547697f3a77195d8dd1
$ ./btctool addresses 1 2 ${pubseed1} ${pubseed2} ${pubseed3}
3GQd1tosFCE7Vo4TAiDHEKTaBgoyZTeL6R
$ bitcoind sendtoaddress 3GQd1tosFCE7Vo4TAiDHEKTaBgoyZTeL6R 0.01
6a9538f496f4c2d7f50c342fa6f6f76904a3b19f55f3a54a0003fc00b327d81b
(I waited here for the tx to get into a block)
$ ./chaintool sync /var/lib/bitcoin/.bitcoin/blocks 2 /dev/null
$ ./chaintool listunspent
[
{
txid:
6a9538f496f4c2d7f50c342fa6f6f76904a3b19f55f3a54a0003fc00b327d81b,
vout: 1,
address: 3GQd1tosFCE7Vo4TAiDHEKTaBgoyZTeL6R,
scriptPubKey: a914a1701be36532f05a74511fca89afce180c58189587,
amount: 100,
confirmations: 1
}
]
$ cat outputs EOF
13QAKNuh9uFcEiNAsct6LSF1qWQR6HLarT 5
1FV4Fm3VCXfWy7BAXzT8t5qqTvEKZSad9v
EOF
$ tx=$(./chaintool createtx 1 demo outputs)
(I manually edited ${tx} at this point to add an OP_RETURN output. We're
currently working toward using OP_RETURN in a provable solvency scheme.)
$ signedtx1=$(./chaintool signtx ${tx} privseed1)
input #0: need 1 of
[:03c831711ea65decc06b0f3ccb4b9f1ba1a99a6933e520f6e7e4c3dbb4f015b701,
:0347f2a0a346f21538fc451b95a600bc64ce5d2d28b89bf547697f3a77195d8dd1]
$ signedtx2=$(./chaintool signtx ${signedtx1} privseed2)
$ bitcoind sendrawtransaction ${signedtx2}
b485b185c77d803f75e1ccfee1b5072846c9e0728f4c955ca40dce82263f8f16
$ exit
:-)
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this first edition is now available. Download your free book today!
Re: [Bitcoin-development] Bug in 2-of-3 transaction signing in Bitcoind?
On Tuesday, 15 April 2014, at 6:39 pm, Chris Beams wrote:
Looks interesting. Is the source available?
The intent is to open-source it. We will do so when I'm confident that we have
all the kinks worked out.
Here's what it can do presently:
$ ./btctool
usage: ./btctool function [args]
encode16
Encode stdin to hex.
decode16 [hex]
Decode hex from stdin or string.
encode64 [hex]
Encode stdin or octets to Base64.
decode64 [base64]
Decode Base64 from stdin or string.
encode58 version [hex]
Encode stdin or octets to Base58Check.
decode58 [base58]
Decode Base58Check from stdin or string.
disassemble [script]
Disassemble hex script.
sha256 [hex]
Hash stdin or octets using SHA-256.
rmd160 [hex]
Hash stdin or octets using RIPEMD-160.
privkey [hex]
Derive private key from stdin or octets.
pubkey [privkey]
Derive public key from private key.
address [pubkey]
Derive address from public key.
address m [pubkey...]
Derive m-of-n P2SH address from public keys.
encrypt [privkey]
Encrypt private key per BIP38.
decrypt [privkey]
Decrypt private key per BIP38.
shares m n [privkey]
Distribute private key into m-of-n shares.
join [share...]
Join shares to reconstitute private key.
privkeys k [privseed]
Derive k private keys from private seed.
pubkeys k [pubseed]
Derive k public keys from public seed.
addresses k [pubseed]
Derive k addresses from public seed.
addresses k m [pubseed...]
Derive k m-of-n P2SH addresses from public seeds.
$ ./chaintool
usage: ./chaintool function [args]
init
Initialize a new cache file.
add label pubkey
Add a public key.
add label :pubseed
Add a public seed.
add label m {pubkey|:pubseed}...
Add public keys/seeds for m-of-n P2SH.
rm label
Remove a public key or seed.
ls
List public keys and seeds.
sync blocksdir
Synchronize with block chain.
tip
Print hash of block at tip of main chain.
getbalance [label...]
Get available balance.
listunspent [label...]
List unspent outputs in JSON.
createtx [fee] [label...]
Create transaction from address+amount pairs on stdin.
signtx tx [{privkey|privseed}...]
Sign transaction with private key(s)/seed(s).
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