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This is not a pure refactor; additional functionality is added in
IsSegWitOutput which lets it recurse into P2SH when a
SigningProvider is provided that knows about the inner script.
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540729ef4bf1b6c6da1ec795e441d2ce56a9a58b Implement analyzepsbt RPC and tests (Andrew Chow)
77542cf2a5f8abb97dd46f782c1b0199cc062033 Move PSBT UTXO fetching to a separate method (Andrew Chow)
cb40b3abd4514361a024a1e7a1a281da9261261b Figure out what is missing during signing (Andrew Chow)
08f749c9147a5f3fdbbd880e0974b97084429002 Implement joinpsbts RPC and tests (Andrew Chow)
7344a7b9984b99882e136efc8ad48fb31740df93 Implement utxoupdatepsbt RPC and tests (Andrew Chow)
Pull request description:
This PR adds 3 new utility RPCs for interacting with PSBTs.
`utxoupdatepsbt` updates a PSBT with UTXO information from the node. It only works with witness UTXOs because full transactions (as would be needed for non-witness UTXOs) are not available unless txindex is enabled.
`joinpsbts` joins the inputs from multiple distinct PSBTs into one PSBT. e.g. if PSBT 1 has inputs 1 and 2, and PSBT 2 has inputs 3 and 4, `joinpsbts` would create a new PSBT with inputs 1, 2, 3, and 4.
`analyzepsbt` analyzes a PSBT and determines the current state of it and all of its inputs, and the next step that needs to be done.
Tree-SHA512: 3c1fa302201abca76a8901d0c2be7b4ccbce334d989533c215f8b3e50e22f2f018ce6209544b26789f58f5980a253c0655111e1e20d47d5656e0414c64891a5c
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When signing an input, figure out what was requested for but was unable
to be found and store it in a SignatureData.
Return this information in SignPSBTInput.
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Store the master key fingerprint and derivation path in the
key metadata. hdKeypath is kept to indicate the seed and for
backwards compatibility, but all key derivation path output
uses the key origin info instead of hdKeypath.
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Move non-wallet PSBT code to src/psbt.{h,cpp}, and PSBT wallet code to
src/wallet/psbtwallet.{h,cpp}. This commit contains only code movement (and
adjustments to includes and Makefile.am.)
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conversion.
This commit makes the minimal changes necessary to fix compilation once CTransaction(const CMutableTransaction &tx) is made explicit. In each case an explicit call `CTransaction(...)` was added. Shouldn't affect behaviour or performance.
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109699dd33 Add release notes (Pieter Wuille)
b65326b562 Add matching descriptors to scantxoutset output + tests (Pieter Wuille)
16203d5df7 Add descriptors to listunspent and getaddressinfo + tests (Pieter Wuille)
9b2a25b13f Add tests for InferDescriptor and Descriptor::IsSolvable (Pieter Wuille)
225bf3e3b0 Add Descriptor::IsSolvable() to distinguish addr/raw from others (Pieter Wuille)
4d78bd93b5 Add support for inferring descriptors from scripts (Pieter Wuille)
Pull request description:
This PR adds functionality to convert a script to a descriptor, given a `SigningProvider` with the relevant information about public keys and redeemscripts/witnessscripts.
The feature is exposed in `listunspent`, `getaddressinfo`, and `scantxoutset` whenever these calls are applied to solvable outputs/addresses.
This is not very useful on its own, though when we add RPCs to import descriptors, or sign PSBTs using descriptors, these strings become a compact and standalone way of conveying everything necessary to sign an output (excluding private keys).
Unit tests and rudimentary RPC tests are included (more relevant tests can be added once RPCs support descriptors).
Fixes #14503.
Tree-SHA512: cb36b84a3e0200375b7e06a98c7e750cfaf95cf5de132cad59f7ec3cbd201f739427de0dc108f515be7aca203652089fbf5f24ed283d4553bddf23a3224ab31f
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serialization
4e4de10f69d5d705256cadfb15d76314dff16e77 Throw error if CPubKey is invalid during PSBT keypath serialization (Gregory Sanders)
Pull request description:
Related to https://github.com/bitcoin/bitcoin/pull/14689
We should catch this error before attempting to deserialize it later.
Tree-SHA512: d2f3ea7f363818ac70c81ee988231b2bb50d055b6919f7bff3f27120c85a7048bfa183efae33e23e6b81d684bcb8bb81e5b209abb3acbcaff1d88014f4f1aa93
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Remove redundant arguments to SignPSBTInput -- since it needs several
bits of the PartiallySignedTransaction, pass in a reference instead of
doing it piecemeal. This saves us having to pass in both a PSBTInput and
its index, as well as having to pass in the CTransaction. Also avoid
redundantly passing the sighash_type, which is contained in the
PSBTInput already.
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Refactor out a "PSBTInputSigned" function to check if a PSBT is signed,
for use in subsequent commits.
Also improve a related comment.
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New constructor that creates a PartiallySignedTransaction from a
CTransaction, automatically sizing the inputs and outputs vectors for
convenience.
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global map
4fb3388db95f408566e43ebb9736842cfbff0a7d check that a separator is found for psbt inputs, outputs, and global map (Andrew Chow)
Pull request description:
Currently it doesn't make sure that a separator was found so PSBTs missing a trailing separator would still pass. This fixes that and adds a test case for it.
It really only makes sense to check for the separator for the output maps as if an input or global map was missing a separator, the fields following it would be interpreted as belonging to the previous input or global map. However I have added the check for those two anyways to be consistent.
Tree-SHA512: 50c0c08e201ba02494b369a4d36ddb73e6634eb5a4e4e201c4ef38fd2dbeea2c642b8a04d50c91615da61ecbfade37309e47431368f4b1064539c42015766b50
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Now that `GetType()` is not propagated, the benefits are not worth the code.
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917353c8b0eff4cd95f9a5f7719f6756bb8338b1 Make SignPSBTInput operate on a private SignatureData object (Pieter Wuille)
cad5dd2368109ec398a3b79c8b9e94dfd23f0845 Pass HD path data through SignatureData (Pieter Wuille)
03a99586a398ee38f40c3b72d24c6a2ba4b88579 Implement key origin lookup in CWallet (Pieter Wuille)
3b01efa0d1bf3d23d1b7b7e518849f1fc26314f9 [MOVEONLY] Move ParseHDKeypath to utilstrencodings (Pieter Wuille)
81e1dd5ce1a32114a38691ec6b55e72ab04dbbb1 Generalize PublicOnlySigningProvider into HidingSigningProvider (Pieter Wuille)
84f1f1bfdf900cd28099e428441aa42f9d11a0ed Make SigningProvider expose key origin information (Pieter Wuille)
611ab307fbd8b6f8f7ffc1d569bb86d1f9cb4e92 Introduce KeyOriginInfo for fingerprint + path (Pieter Wuille)
Pull request description:
This PR adds "key origin" (master fingeprint + key path) information to what is exposed from `SigningProvider`s, allowing this information to be used by the generic PSBT code instead of having the RPC pull it directly from the wallet.
This is also a preparation to having PSBT interact with output descriptors, which can then directly expose key origin information for the scripts they generate.
Tree-SHA512: c718382ba8ba2d6fc9a32c062bd4cff08b6f39b133838aa03115c39aeca0f654c7cc3ec72d87005bf8306e550824cd8eb9d60f0bd41784a3e22e17b2afcfe833
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5df6f089b53c5b5859e5a3454c026447e4752f82 More tests of signer checks (Andrew Chow)
7c8bffdc24e005c3044a9a80bbc227b2a39b8605 Test that a non-witness script as witness utxo is not signed (Andrew Chow)
8254e9950f67d750c7f5905bfdef526d825965ed Additional sanity checks in SignPSBTInput (Pieter Wuille)
c05712cb590c8c76729a71d75a290c67ae9e3c06 Only wipe wrong UTXO type data if overwritten by wallet (Pieter Wuille)
Pull request description:
The current PSBT signing code can end up producing a non-segwit signature, while only the UTXO being spent is provided in the PSBT (as opposed to the entire transaction being spent). This may be used to trick a user to incorrectly decide a transaction has the semantics he intends to sign.
Fix this by refusing to sign if there is any mismatch between the provided data and what is being signed.
Tree-SHA512: b55790d79d8166e05513fc4c603a982a33710e79dc3c045060cddac6b48a1be3a28ebf8db63f988b6567b15dd27fd09bbaf48846e323c8635376ac20178956f4
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Strip out the witnesses when serializing the non-witness utxo. However
witness serializations are allowed, so make sure we always deserialize
as witness.
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0-input transactions can be ambiguously deserialized as being witness
transactions. Since the unsigned transaction is never serialized as
a witness transaction as it has no witnesses, we should always
deserialize it as a non-witness transaction and set the serialization
flags as such.
Also always serialize the unsigned transaction as a non-witness transaction.
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e306be742932d4ea5aca0ea4768e54b2fc3dc6a0 Use 72 byte dummy signatures when watching only inputs may be used (Andrew Chow)
48b1473c898129a99212e2db36c61cf93625ea17 Use 71 byte signature for DUMMY_SIGNATURE_CREATOR (Andrew Chow)
18dfea0dd082af18dfb02981b7ee1cd44d514388 Always create 70 byte signatures with low R values (Andrew Chow)
Pull request description:
When creating signatures for transactions, always make one which has a 32 byte or smaller R and 32 byte or smaller S value. This results in signatures that are always less than 71 bytes (32 byte R + 32 byte S + 6 bytes DER + 1 byte sighash) with low R values. In most cases, the signature will be 71 bytes.
Because R is not mutable in the same way that S is, a low R value can only be found by trying different nonces. RFC 6979 for deterministic nonce generation has the option to specify additional entropy, so we simply use that and add a uin32_t counter which we increment in order to try different nonces. Nonces are sill deterministically generated as the nonce used will the be the first one where the counter results in a nonce that results in a low R value. Because different nonces need to be tried, time to produce a signature does increase. On average, it takes twice as long to make a signature as two signatures need to be created, on average, to find one with a low R.
Having a fixed size signature makes size calculations easier and also saves half a byte of transaction size, on average.
DUMMY_SIGNATURE_CREATOR has been modified to produce 71 byte dummy signatures instead of 72 byte signatures.
Tree-SHA512: 3cd791505126ce92da7c631856a97ba0b59e87d9c132feff6e0eef1dc47768e81fbb38bfbe970371bedf9714b7f61a13a5fe9f30f962c81734092a4d19a4ef33
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With watching only inputs, we do not know how large the signatures
for those inputs will be as their signers may not have implemented
71 byte signatures. Thus we estimate their fees using the 72 byte
dummy signature to ensure that we pay enough fees.
This only effects fundrawtransaction when includeWatching is true.
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3fc20632a3ad30809356a58d2cf0ea4a4ad4cec3 qt: Set BLOCK_CHAIN_SIZE = 220 (DrahtBot)
2b6a2f4a28792f2fe9dc1be843b1ff1ecae35e8a Regenerate manpages (DrahtBot)
eb7daf4d600eeb631427c018a984a77a34aca66e Update copyright headers to 2018 (DrahtBot)
Pull request description:
Some trivial maintenance to avoid having to do it again after the 0.17 branch off.
(The scripts to do this are in `./contrib/`)
Tree-SHA512: 16b2af45e0351b1c691c5311d48025dc6828079e98c2aa2e600dc5910ee8aa01858ca6c356538150dc46fe14c8819ed8ec8e4ec9a0f682b9950dd41bc50518fa
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fad231ad41e12b7047deb64220942ca8cb8357bc Fix merging of global unknown data in PSBTs (Andrew Chow)
41df035ee1694715ee1e0f89b08ac8c73987807b Check that PSBT keys are the correct length (Andrew Chow)
Pull request description:
This PR fixes a few bugs that were found and adds tests checking for these errors.
Specifically:
- Single byte keys are checked to actually be one byte.
- Unknown global data must be merged when combining two PSBTs.
Tree-SHA512: c0e7b4bc607d510cc005aaa7c0813ee58c5467ab7ce4adce485522dfeee92b1af3d29fe89df778b0ea812bb3827e085b30e04d4f4ebcefd8364d809573991332
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Checks that all of the one byte type keys are actually one byte and
throw an error if they are not.
Add tests for each type to check for this behavior.
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walletprocesspsbt takes a PSBT format transaction, updates the
PSBT with any inputs related to this wallet, signs, and finalizes
the transaction. There is also an option to not sign and just
update.
walletcreatefundedpsbt creates a PSBT from user provided data
in the same form as createrawtransaction. It also funds the transaction
and takes an options argument in the same form as fundrawtransaction.
The resulting PSBT is blank with no input or output data filled
in.
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The SignPSBTInput function takes a PSBTInput, SignatureData, SigningProvider,
and other data necessary for signing. It fills the SignatureData with data from
the PSBTInput, retrieves the UTXO from the PSBTInput, signs and finalizes the
input if possible, and then extracts the results from the SignatureData and
puts them back into the PSBTInput.
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Added methods which move data to/from SignaturData objects to
PSBTInput and PSBTOutput objects.
Added sanity checks for PSBTs as a whole which are done immediately
after deserialization.
Added Merge methods to merge a PSBT into another one.
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Stores pubkeys in SignatureData and retrieves them when using GetPubKey().
Stores whether the signatures in a SignatureData are for a witness input.
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Removes CombineSignatures and replaces its use in tests with
ProduceSignature to test the same behavior for ProduceSignature.
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Instead of using CombineSignatures to create the final scriptSig or
scriptWitness of an input, use ProduceSignature itself.
To allow for ProduceSignature to place signatures, pubkeys, and scripts
that it does not know about, we pass down the SignatureData to SignStep
which pulls out the information that it needs from the SignatureData.
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In addition to having the scriptSig and scriptWitness, have SignatureData
also be able to store just the signatures (pubkeys mapped to sigs) and
scripts (script ids mapped to scripts).
Also have DataFromTransaction be able to extract signatures and scripts
from the scriptSig and scriptWitness of an input to put them in SignatureData.
Adds a new SignatureChecker which takes a SignatureData and puts pubkeys
and signatures into it when it successfully verifies a signature.
Adds a new field in SignatureData which stores whether the SignatureData
was complete. This allows us to also update the scriptSig and
scriptWitness to the final one when updating a SignatureData with another
one.
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6aa33feadbe11bfa505a80a691d84db966aca134 Drop UpdateTransaction in favor of UpdateInput (Ben Woosley)
Pull request description:
Updating the input explicitly requires the caller to present a mutable
input, which more clearly communicates the effects and intent of the call
(and, often, the enclosing loop).
In most cases, this input is already immediately available and need not be
looked up.
Tree-SHA512: 8c7914a8b7ae975d8ad0e9d760e3c5da65776a5f79d060b8ffb6b3ff7a32235f71ad705f2185b368d9263742d7796bb562395d22b806d90e8502d8c496011e57
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CMutableTransaction
Templated version so that no copying of CMutableTransaction into a CTransaction is
necessary. This speeds up the test case transaction_tests/test_big_witness_transaction
from 7.9 seconds to 3.1 seconds on my machine.
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Updating the input explicitly requires the caller to present a mutable
input, which more clearly communicates the effects and intent of the method.
In most cases, this input is already immediately available and need not be
looked up.
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CKeyStore is a rich interface that provides many features, including knowledge
of scripts and pubkeys for solving, private keys for signing, in addition to
watch-only keys and scripts, and distinguishing lack of keys from them just
being encrypted.
The signing logic in script/sign does not actually need most of these features.
Here we introduce a simpler interface (SigningProvider) which *only* provides
keys and scripts. This is actually sufficient for signing.
In addtion, we swap the dependency between keystore and script/sign
(keystore now depends on script/script with CKeyStore deriving from
SigningProvider, rather than CKeyStore being the interface that signing
relies on).
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