3b60ad5567 example: Modify `taproot-psbt.rs` to make the use of prevouts clearer. (S. Santos)
Pull request description:
The `taroot-psbt.rs` example uses only one input, and therefore the current code may not make it clear that the number of prevout items must correspond to the number of transaction inputs, since the prevout slice is built within a loop.
This PR aims to make this clear to any user who wants to reuse the logic from the example code.
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dac627cc09 Feature: Psbt fee checks (junderw)
Pull request description:
Closes#2061
These new methods on Psbt will add checks for high fees by default. The threshold for "high fees" is currently set to 25000 sat/vbyte, which is about 20x higher than the highest next block fees seen on the "Mempool" website.
The primary goal of this change is to prevent users of the library from accidentally sending absurd amounts of fees.
(ie. Recently in September 2023 there was a transaction that sent an absurd amount of fees and made news in the Bitcoin world. Luckily the mining pool gave it back, but some might not be so lucky.)
There are variants of the method that allow for users to set their own "absurd" threshold using a `FeeRate` value. And there is a method that performs no checks, and the method name is alarming enough to draw attention in a review, so at least developers will be aware of the concept.
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c34e3cc7cc Re-write size/weight API (Tobin C. Harding)
73f7fbf520 Add code comments to transaction serialization (Tobin C. Harding)
29f20c1d0b Add segwit serialization constants (Tobin C. Harding)
Pull request description:
Audit and re-write the weight/size API for `Block` and `Transaction`. First two patches are trivial, patch 3 contains justification and explanation for this work, copied here:
```
Recently we introduced a bug in the weight/size code, while
investigating I found that our `Transaction`/`Block` weight/size APIs
were in a total mess because:
- The docs were stale
- The concept of weight (weight units) and size (bytes) were mixed up
I audited all the API functions, read some bips (141, 144) and re-wrote
the API with the following goals:
- Use terminology from the bips
- Use abstractions that mirror the bips where possible
```
Please note, this PR introduces panics if a sciptPubkey overflows the calculation `weight = spk.size() * 4`.
Fix#2049
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sanket1729:
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5901d35095 Add push_p2wpkh function on Witness (Tobin C. Harding)
8cd409d561 Deprecate push_bitcoin_signature (Tobin C. Harding)
Pull request description:
In order to create the witness to spend p2wpkh output one must create a `Witness` that includes the signature and the pubkey, we should have a function for this.
## Notes
The PR originally added a `push_p2wphk` method, this is now instead a constrcutor `Witness:p2wpkh` (after review discussion below).
- Patch 1 changes `push_bitcoin_signature` to take an `ecdsa::Sigtnture` instead of an `ecdsa::SerializedSignature`
- Patch 2 takes a `secp256k1::PublicKey` removing the need for an error path (discussed below).
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apoelstra:
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24e5e19ed0 Add changelog entries (Tobin C. Harding)
79f2157311 bitcoin: Grab changelog entry from 0.30.1 release (Tobin C. Harding)
Pull request description:
Gearing up for the next release add changelog entries for everything merged upto July 24.
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clarkmoody:
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Recently we introduced a bug in the weight/size code, while
investigating I found that our `Transaction`/`Block` weight/size APIs
were in a total mess because:
- The docs were stale
- The concept of weight (weight units) and size (bytes) were mixed up
I audited all the API functions, read some bips (141, 144) and re-wrote
the API with the following goals:
- Use terminology from the bips
- Use abstractions that mirror the bips where possible
The `Witness::push_bitcoin_signature` method is old and a bit stale.
Bitcoin has taproot signatures now so the name is stale, also we have
the `crate::ecdsa::Signature` type that holds the secp sig and the hash
type so we can use that instead of having two separate parameters.
Add a new, up to date, `Witness::push_ecdsa_signature` function and
deprecate the `push_bitcoin_signature` one.
There is no logical default for the transaction version number, there is
only pre-bip68 (v1) and post-bip68 (v2). Uses should specify the version
they want not rely on us making the choice.
(I originally added this impl to support testing, this was in hindsight
the wrong thing to do, props to Sanket for noticing.)
One of our stated aims is to make it possible to learn bitcoin by using
our library. To help with this aim add to private consts for the segwit
transaction marker and flag serialization fields.
158ba26a8a Feature: Count sigops for Transaction (junderw)
Pull request description:
I copied over the sigop counting logic from Bitcoin Core, but I made a few adjustments.
1. I removed 2 consensus flags that checked for P2SH and SegWit activation. This code assumes both are activated. If we were to include that, what would be a good way to go about it? (ie. If I run this method on a transaction from the 1000th block and it just so happened to have a P2SH-like input, Bitcoin Core wouldn't accidentally count those sigops because the consensus flag will stop them from running the P2SH logic. Same goes for SegWit)
3. Since there's no guarantee that we have an index from which we can get the prevout scripts, I made it into a generic closure that looks up the prevout script for us. If the caller doesn't provide it, We can only count sigops directly in the scriptSig and scriptPubkey (no P2SH or SegWit).
## TODO
- [x] Write tests for transaction sigop counting
~~Edit: The test changes are just to get the 1.48 tests passing. I'll remove them and replace them with whatever solution that is agreed upon in another PR etc.~~
Edit 2: This is the code I used as a guide:
8105bce5b3/src/consensus/tx_verify.cpp (L147-L166)
Edit 3: I found a subtle bug in the implementation of `count_sigops` (https://github.com/rust-bitcoin/rust-bitcoin/pull/2073#issuecomment-1722403687)
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e4c7e01a6f Use the new bech32 iterator API (Tobin C. Harding)
Pull request description:
Depend on the newly released version of `bech32`, BOOM!
ACKs for top commit:
apoelstra:
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clarkmoody:
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95b7a95fc2 test: correct psbt used for regression test (Subhradeep Chakraborty)
Pull request description:
The `unknown` key used in the `Psbt` (in `serde_regression_psbt` test) is not really unknown. Also the `preimages` in the `Input` don't seem to be valid. Though they don't affect the tests because of the `serde::serialize`, the `Psbt` itself is invalid and hence this PR.
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tcharding:
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b2a7d7023c Rename XpubIdentifier to XKeyIdentifier (Tobin C. Harding)
ffd2466ad1 Move XpubIdentifier to the bip32 module (Tobin C. Harding)
Pull request description:
- Patch 1: Move the hash to the `bip32` module where it is used, as we have done with other hashes recently (and re-export it at crate root).
- Patch 2: Rename the hash to `XKeyIdentifier` as discussed in #2014Fix: #2014
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71a5fe2b54 Customize Debug implementation of absolute::LockTime (Subhradeep Chakraborty)
Pull request description:
Fixes https://github.com/rust-bitcoin/rust-bitcoin/issues/2011.
This PR aims to make the "pretty print" of `absolute::LockTime` prettier by printing `X blocks` and `X seconds` for `Blocks` and `Seconds` respectively instead of the default Enum printing.
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tcharding:
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bc398204bf Remove redundant segwit version from function names (Tobin C. Harding)
Pull request description:
A P2TR output does not need to be clarified with version 1, it is implicit. As with p2wpkh/p2wsh and version 0.
Remove redundant version identifiers from function names, deprecating the originals.
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f17bb0d18f Remove unnecessary reference (Tobin C. Harding)
Pull request description:
`T` is a generic that implements`AsRef<PushBytes>`, it should not be a reference. This is inline with other usages of `AsRef<PushBytes>` for example in `Builder::push_slice`.
Found while working on #2003
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BIP-68 activated a fair while ago (circa 2019) and since then only
transaction versions 1 and 2 have been considered standard.
Currently in our `Transaction` struct we use an `i32`, this means users
can construct a non-standard transaction if they do not first look up
what the value should be. We can help folk out here by abstracting over
the version number.
Since the version number only governs standardness elect to make the
inner `i32` public (ie., not an invariant). The aim of the type is to
make life easy not restrict what versions are used.
Add transaction::Version data type that simply provides two consts `ONE`
and `TWO`.
Add a `Default` impl on `Version` that returns `Version::TWO`.
In tests that used version 0, instead use `Version::default` because the
test obviously does not care.
52f2332383 Remove docs from witness version conversion functions (Tobin C. Harding)
47d6d785cb Remove bip 173/350 test vectors (Tobin C. Harding)
e0eaeaad99 Split ParseError out of Error (Tobin C. Harding)
0f536e86dc Add new UnknownAddressTypeError for parsing address type (Tobin C. Harding)
e2014cba1b Import error variants within dislay impl (Tobin C. Harding)
9d7791fcd6 Remove unnecessary self:: from error import (Tobin C. Harding)
b2e485ed51 Split the address error code out into a separate module (Tobin C. Harding)
f34ca0c52b Move address.rs to address/mod.rs (Tobin C. Harding)
Pull request description:
In preparation for depending on the recently released version of `rust-bech32` do a bunch of preparatory fixes.
1. Improve `address` module error handling as we are doing else where at the moment
2. Remove bip 173 and 350 test vector tests, these are fully covered in bech32
3. Trim down the docs on `WitnessVersion`
This PR is the first 8 patches of https://github.com/rust-bitcoin/rust-bitcoin/pull/1951
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ccdcffe69c Re-export Opcode (Tobin C. Harding)
Pull request description:
We recently rename `opcodes::All` to `Opcode` but did not re-export it from the crate root. Since it now has a nice clear name we can do so.
Found while hacking up the `rust-bitcoincore-rpc` dependency upgrade for upcoming release `bitcoin v0.31.0`.
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acbf23aaa5 Add `is_multisig` helper to Script type (Clark Moody)
Pull request description:
A new `is_multisig` helper method to classify bare multisig output scripts.
The form of a valid multisig script is:
- Pushnum `M`
- <N> pubkeys
- Pushnum `N`
- `OP_CHECKMULTISIG`
`N` must equal the number of pushed pubkeys, and `M` must be less than or equal to `N`.
I've tested this against the RPC output of Core at the block level, checking that the total number of multisig outputs matches.
```
Block 350338, 89 multisig
Block 350340, 29 multisig
Block 350341, 4 multisig
Block 350343, 579 multisig
Block 350344, 48 multisig
Block 350346, 11 multisig
Block 350347, 404 multisig
Block 350350, 127 multisig
Block 350351, 1 multisig
Block 350353, 40 multisig
Block 350356, 13 multisig
Block 350357, 2 multisig
Block 350358, 1 multisig
```
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026a55809e Fix: Script::count_sigops parsing should not return a Result (junderw)
Pull request description:
When implementing some tests for the Transaction PR, I noticed that there were coinbase transactions that would pass Bitcoin Core parsing and fail my code.
It turns out that the Script parsing for sigops calls `break` to exit the loop and returns the current n value whenever there is an EarlyEndOfScript error.
See this comment: https://github.com/rust-bitcoin/rust-bitcoin/pull/2073#issuecomment-1722403687 for some links to the relevant source.
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These docs do not add that much value, we do not typically bother
documenting `From` and `TryFrom` implementations because they are super
well known and its obvious from the function signature what is going on.
The `address::Error` is module level general, we can make the code
easier to maintain and easier to stabalize by splitting the parse error
out of the general error.
Create a `ParseError` that is returned by `FromStr for Address`. Remove
the now unused variants from the general `address::Error`.
In an effort to reduce the number of lines of code import the error
variants locally within the `Display` impl on `Error`.
Refactor only, no logic changes.
Split the error code out of `address/mod.rs` and into
`address/error.rs`. Code move only, no changes other than to
imports/exports etc. to make it build.
a0a3d4728a Fix deprecation notice (Tobin C. Harding)
Pull request description:
Recently we deprecated the `segwit_signature_hash` function but during development the deprecation notice got stale.
Fix deprecation notice to use the actual function names.
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7309c7749a Split witness version errors up (Tobin C. Harding)
40db2f5ed6 witness_version: Remove rustdocs from TryFrom imlps (Tobin C. Harding)
3397ff9910 witness_version: Use Self in error From impl (Tobin C. Harding)
Pull request description:
Done as part of the push to have small specific errors instead of large general ones.
Split the `witness_version::Error` up into small specific errors.
The first two patches are preparatory clean up.
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4f43965ade Make Encodable/Decodable usage uniform (Tobin C. Harding)
Pull request description:
One encodes to a writer and decodes from a reader, most of the time in the consensus `Encodable`/`Decodable` traits we use generic `R`/`W` and variable `r`/`w` but there are other places that use other characters.
While touching these lines note also that there are a bunch of unneeded `mut`s, I'm not sure why since usually between the compiler and the linter `mut` is handled correctly.
Make implementations of `Encodable` and `Decodable` uniform by:
- Use R/W and r/w for trait and variable name
- Remove unneeded mut
(This is split out of #1891 to assist review.)
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a68c42e113 Remove test from Transaction test names (yancy)
f796d6fef9 Use Weight type for scaled_size (yancy)
e746341f33 Add tests for scaled_size (yancy)
97b7a2dee9 Use Weight type for block base_size (yancy)
9536a9947c Add base_size test (yancy)
Pull request description:
Use Weight type for `base_size` in Transaction. Also a small re-factor to remove `test_` and `_tests` from the testname for transaction tests.
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Tobin C. Harding
Andrew Poelstra
S. Santos
junderw
Clark Moody
Subhradeep Chakraborty
Riccardo Casatta