The `Version` type uses a signed 32 bit integer inner type but we bit
twiddle as if it was a `u32`. We recently made the inner type private to
hide the data type because of this oddness.
Add methods `from_consensus` and `to_consensus` to facilitate any
possible thing users may want to do with a consensus version value.
The Bitcoin block version is a signed integer for historical reasons,
but we bit twiddle it like an unsigned integer and during consensus
encode/decode we cast the signed value to an unsigned value.
In order to hide this confusion, make the inner value private and add a
couple of constants for v1 and v2 block versions.
Currently the types in the block module have longer names than
necessary, "header" and "version" identifiers contain the word "block",
this is unnecessary because we can write `block::Header` instead of
`BlockHeader` when context is required. This allows us to use the naked
type `Header` inside the `block` module with no loss of clarity.
We are stuck with `BlockHash` because the type is defined along with all
the other hash types in `hash_types`, leave it as is for now but
re-export it from the `block` module to assist in putting types that are
used together in scope in the same place, making import statements more
ergonomic.
The `all` module enables usage of a wildcard import statement without
muddying the scope with any other types defined in `opcodes`, in other
words if one wants to use the `All` type `opcodes::All` is the most
clear way to use it, however usage of naked `OP_FOO` types is perfectly
clear.
Add documentation stating that we guarantee to never put anything else
in the `all` module so folks are confident using a wildcard import will
not bring any rubbish into scope.
Expected usage in downstream applications that need types in `opcodes`
as well as the opcodes:
```
use bitcoin::opcodes::all::*;
use bitcoin::opcodes;
```
Also, we do no implement `Ord` or `PartialOrd`, document this including
HTML tags hiding an example bug from Bitcoin Core that shows why not.
9a1623c1dc Re-export hashbrown when enabled (Tobin C. Harding)
Pull request description:
`hashbrown` used to be exported until commit 23ee0930c7 which removed the `pub extern crate` declaration.
Found thanks to afilini (#1342)!
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Kixunil:
ACK 9a1623c1dc
Tree-SHA512: 0363781dc06211eec59246ce54582220674d5ab2bd6e62ad15eeb97b0df6435cdf23df8306131c176b6003dde31d1e376f52981f2e69e9d2529876d3ada727e0
b6f9e47dba Fix `no_std` when `bitcoinconsensus` is enabled (Martin Habovstiak)
Pull request description:
`default-features = false` was missing previously but blindly adding it would lead to subtle risk of breaking when a crate not needing `std` depends on `bitcoinconsensus` and simultaneously another crate not needing `bitcoinconsensus` depends on `std` and another crate depends on them both.
This change fixes it by introducing `bitcoinconsensus-std` feature flag and provides a fallback if the flag is off. Unfortunately the fallback has to use a bit of reasonable `unsafe` due to limitations of upcasting.
The only safe alternatives are not do it and provide worse experience for crates that are affected by the problem above or break the API, which couldn't be backported and would be more annoying to use.
Closes#1343
This is considered PoC PR as I realized the possibility of the hack (and necessity of `unsafe`) at the last moment. Things like tests and modifying CONTRIBUTING to change the stance on `unsafe` will be added if `unsafe` is ACKed.
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b84e1d46c0 Move amount module out of util (Tobin C. Harding)
Pull request description:
Done as part of flattening the `util` module. Simply move the `amount` module out of the `util` module and to the crate root. Justified by the fact that the `Amount` type is more-or-less a "primitive" bitcoin type.
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ACK b84e1d46c0
Tree-SHA512: 9ec707f49b7ab29f573be22b366d2ea9c1a8e4b27e80350d521b9c6607fca4142f079648cb739ba8590edd97c21a00029c3647c4c8cebe47cc2dfee1b10b8b39
All the types that we define with `impl_array_newtype` are
`Copy` so the correct conversion method to get the underlying byte array
is `to_bytes`. We currently provide `into_bytes` as well as `to_bytes`,
with one of them calling `clone` - this is unnecessary and against
convention.
- Remove `into_bytes` and for `to_bytes` just return the inner field.
- Add a method that causes build to fail if `Copy` is not implemented.
29df410ea3 Document state after call to calculate_root_inline (Tobin C. Harding)
2dbc7fdf21 Rename merkle_root functions (Tobin C. Harding)
22dd904735 Rename util::hash module (Tobin C. Harding)
Pull request description:
Done as part of flattening `util`.
The `util::hash` module only provides two functions, both to calculate the merkle root of a list of hashes.
1. Rename `util::hash` -> `crate::merkle_root`
2. Change function names to `calculate[_inline]` so usage becomes `merkle_root::calculate`
Done as two separate patches so we can bikeshed the names, can squash if needed.
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ACK 29df410ea3
Tree-SHA512: 17ace90c7700b5d7adf8b95731c9a348b5c92863806cc88bc40730547f457e44160efb19985e025970b59fea86d68f0bf4be0af17717a65ae44f11c8d10ec4c6
1050fe9cae Remove unnecessary borrow (Tobin C. Harding)
3966709336 Use is_none() (Tobin C. Harding)
d192052519 Remove unnecessary dereference (Tobin C. Harding)
624cda07b3 Remove unnecessary casts (Tobin C. Harding)
Pull request description:
Clippy has been updated and new warnings are being triggered in our codebase. This PR does all warnings using nightly since they all looked like reasonable things to fix.
Needed for CI to pass in other open PRs.
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ACK 1050fe9cae.
Tree-SHA512: 7dcfb6a72a0aae51b49b417bb94cbe1becb1095d1bf0011921b1834a10f792cfcdeee37993ab9b103bd2dfcc9cd3c26cd7f1bb80b06b0d1aa4aaa454bfb0b3f0
d6ca7e4b9f Add a test parsing transaction with a huge witness (Martin Habovstiak)
Pull request description:
This transaction broke past versions of `rust-bitcoin` and LND so this adds a test to avoid reintroducing the problem in the future.
See also https://github.com/romanz/electrs/issues/783
I'm publishing this immediately for research purposes. I can clean it up later if required (low on time rn) or we may even not merge it if there is a better test.
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Tree-SHA512: cfa9f5c82be0885a82bddb0c15f3177e05feedb369a931e58bf48d90b26eab85bc501d84d17927fa72b42ad4f1016e6042ad318662403271c738eaa91cee7748
cc0b1f1804 Add a CHANGELOG entry for 0.28.2 (Matt Corallo)
Pull request description:
I'm not actually sure if we want this - we don't seem to (consistently) add entries for point releases, but figured I'd put it up in case we want it.
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Kixunil:
ACK cc0b1f1804
sanket1729:
ACK cc0b1f1804
Tree-SHA512: b41f647cfea925a5acd8eaa8568692e7393dabbfd6c75e9dad9e18f34847353363cadaad9109b41a7b1e5851030fefc0180e6b824a2eaaf8f58b4d62fd4bc68f
This new method will check the last witness element to see if it starts with 0x50, and
depending on the result it will return the second to last or third to last witness
element according to BIP341.
In its current state, Witness can not know what type of script it is fulfilling,
so it is up to the caller to verify if the previous output is a taproot output or not.
Arbitrary indexing into Witness fixes the API of last and second_to_last to be more flexible.
This patch started off as an addition of third_to_last, but ended up evolving
into arbitrary indexing to allow for future use cases.
A list of the indices of the start byte for each witness element is stored as an ordered
contiguous group of u32s represented as 4 bytes each in the Vec<u8> contents.
The bytes are stored using to_ne_bytes for performance reasons. A helper function is added
to the tests to allow for easier contruction of the contents Vec in test vectors. u32 was
chosen because 22 bits are needed to store 4,000,000 which is the maximum weight limit for
a block. This might need to be reworked in the event of consensus limits increasing, but
u32 can hold 1000x the current limit, so it should be fine for the forseeable future.
The push and consensus_deserialize functions utilize rotate_left and rotate_right to move
the indices to the end of the new allocation. Depending on the size of the data, this
might be more of a performance hit than just allocating a new temporary Vec to store the
indices and append them after parsing is completed. However, for a majority of cases
rotating the indices should be faster. Suggestions to use VecDeque instead of Vec for
contents necessitate other considerations, since it is not a public facing change,
those optimizations can be dealt with in future patches.
The Index<usize> trait is implemented using the new nth method with expect.
The Iter struct is reworked to make use of the new data representation. This new data
structure makes it trivial to implement DoubleEndedIterator and other such traits, but
I have decided to leave this as out of scope for this patch.
This transaction broke past versions of `rust-bitcoin` and LND so this
adds a test to avoid reintroducing the problem in the future.
See also https://github.com/romanz/electrs/issues/783
In order that we can safely change/maintain de/serialization code we
need to have regression tests with hard coded serializations for each
type that implements serde.
It is enough to test a single serde data format, use JSON for `opcodes`
and bincode for other types.
Do regression testing in a newly added `tests` module.
The `base58` module is for encoding and decoding, it makes sense for the
public functions to be called `encode` and `decode`. We also have some
functions that operate on data with a checksum, for these it makes sense
to tack `check` onto the _end_ of the function name.
With this applied the public API is:
- decode
- decode_check
- encode
- encode_check
- encode_check_to_fmt
Code is arguably easier to read if the most important stuff comes first.
In the old days, when writing C, we had to put definitions before they
were used but in Rust this is not the case
Re-order the `base58` file so that the public API functions are up the top
then other helper functions are defined _after_ they are called.
Refactor only, no logic changes.
Currently we are manually adding `0x` in calls to `write!`, this is
unnecessary since the alternate form already adds the `0x`.
Was verified with
```
#[test]
fn bad_checksum_error_hex_format() {
let want = "invalid base58 character 0xab";
let got = format!("{}", Error::BadByte(0xAB));
assert_eq!(got, want)
}
```
Use alternate form to print hex.
The key related errors are incorrect because they are circular, we have
a base58 error variant in `key::Error` and two key error variants in
`base58::Error`.
Remove the key errors from the `base58::Error` type.
The function call `calculate_root_inline` calculates the merkle root
using the input array as a scratch buffer, i.e., we trash the data
during recursive calls to `merkle_root_r`.
Add explicit documentation to the function so its super clear not to use
the hashes again after calling this function.
Recently we renamed the `hash` module to `merkle_root`, this makes the
public functions provided stutter if used with one layer of path as is
Rust convention:
`merkle_root::bitcoin_merkle_root`
We can improve on this by renaming the functions to 'calculate', then we
get
- `merkle_root::calculate()`
- `merkle_root::calculate_inline()`
The `util::hash` module provides two functions for computing a merkle
root from a list/iterator of hashes.
Rename the module to `merkle_root` and move it to the crate root,
deprecate the original functions.
Done as part of flattening the `util` module.
d2ed0fe022 Add `impl IntoIterator for &'_ Witness` (Martin Habovstiak)
Pull request description:
It is considered idiomatic for types that have `iter()` method to also implement `IntoIterator` for their references. `Witness` was missing this so it is added here.
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tcharding:
ACK d2ed0fe022
Tree-SHA512: fc891109696de4f349324d6ddc160249ef22510622d9ce72a65b18f085d86b0de0f3ecb4f7060e1eaf716a908029865cd21cda5a6598fc4c16d0540152d9a4c9
2674327c93 Remove the endian module (Tobin C. Harding)
Pull request description:
Now we have MSRV of 1.41.1 we can use the `from_le_bytes` and `to_be_bytes` methods implemented on standard integer types, these became available in Rust 1.32.
Remove the `endian` module replacing its logic with calls to methods on the respective stdlib integer types.
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ACK 2674327c93
Tree-SHA512: 7cdaf278c9d162cb0080bb6b9ea80ab55f881bfcd389f8b968f8cfaeebb0d27d3b5b46e9677a376bc6b7d4068cf094f50560ed4ae7bc817c50da688f70a7af25
It is considered idiomatic for types that have `iter()` method to also
implement `IntoIterator` for their references. `Witness` was missing
this so it is added here.
b8bd31d5a8 Promote rust-miniscript finalizer (DanGould)
16bf6f68dd Test PSBT integration (DanGould)
6b6ef528a4 Add OP_0 alias for OP_PUSHBYTES_0 (DanGould)
72935a0f6e Move test_data/* tests/data (Tobin Harding)
Pull request description:
resolves#892
* Initial patch adds OP_0 alias for OP_PUSHBYTES_0 as [approved here](https://github.com/rust-bitcoin/rust-bitcoin/pull/935#discussion_r854539416)
* Second patch is the bulk of this work. It tests BIP 174 PSBT integration defined at [The BIP's Test Vectors Section](https://github.com/bitcoin/bips/blob/master/bip-0174.mediawiki#test-vectors) using #957
* Third patch points users to rust-miniscript for a more useful finalizer
ACKs for top commit:
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sanket1729:
ACK b8bd31d5a8. Thanks for sticking with this PR. This looks awesome after #957
Tree-SHA512: dc68e524d4349530b082baf5032460fa56593b0ef192125c0b7d7e00954e5593f386b7f1984fc00106b4b9eafbf29cc80ab368dbd26b710eba0962dbd89e0013
Now we have MSRV of 1.41.1 we can use the `from_le_bytes` and
`to_be_bytes` methods, these became available in Rust 1.32.
Remove the `endian` module replacing its logic with calls to methods on
the respective stdlib integer types.
c4084b91fb Fix broken build due to conflict between #1340 and #999 (Andrew Poelstra)
Pull request description:
I will test merge commits more thoroughly before signing off on them in future, sorry.
ACKs for top commit:
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tcharding:
ACK c4084b91fb
sanket1729:
ACK c4084b91fb
Tree-SHA512: 51ece3aa43045e81138d21b8402b1ec1559a0b37bdfc4c5246ff46fd085364517449a2e20e625934cbc0c96f18eb2fc6121a6e993fd5b9535ae54c863d032a0b
dea9b1d1e0 Re-export base64 when enabled (Alekos Filini)
Pull request description:
`base64` used to be exported until commit 23ee0930c7 which removed the `pub extern crate` declaration.
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1a89d5230c examples: Add taproot-psbt workflow example (Duncan Dean)
Pull request description:
Will address #893.
Currently includes a BIP86 example (no spendable script path)
Working on script path and key path spending when both are possible spending paths.
ACKs for top commit:
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ACK 1a89d5230c
Tree-SHA512: 31d23914faedb2632d517f9a827075f1bf387df6d98f151000f70546d1e67ac332e698c6a01bda40a9baf5b25bff0114928edc0879c5e01753ecfc6ad182fe26
`default-features = false` was missing previously but blindly adding it
would lead to subtle risk of breaking when a crate not needing `std`
depends on `bitcoinconsensus` and simultaneously another crate not
needing `bitcoinconsensus` depends on `std` and another crate depends on
them both.
This change fixes it by introducing `bitcoinconsensus-std` feature flag
and provides a fallback if the flag is off. Unfortunately the fallback
has to use a bit of reasonable `unsafe` due to limitations of upcasting.
The only safe alternatives are not do it and provide worse experience
for crates that are affected by the problem above or break the API,
which couldn't be backported and would be more annoying to use.
Closes#1343
fd7f8daeff Move sighash module to crate root (Tobin C. Harding)
Pull request description:
Done as part of the effort to flatten the `util` module.
The `sighash` module can stand alone in the crate root, it provides a discreet set of functionality - the `SighashCache` and associated types.
Marking as high priority because this is part of flattening `util` which is a required step before we start crate smashing.
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Tree-SHA512: e812ca903f7dccfa5a06084e23f93f617d016583bdf082d7a36ca8e67e49f1d140a3e138b93939e816861460ff2c04d49d5e37a555dd853dca1c76dbccd910bf
Tobin C. Harding
Andrew Poelstra
sanket1729
junderw
Matt Corallo
Martin Habovstiak
DanGould
Alekos Filini