There is never any use for the `sighash` module unless one is signing,
which requires the `crypto` module. The `sighash` module should
therefore live in the `crypto` module. This is not an API breaking
change because we reexport it at the crate root.
`Signature` only supported serialization into `Vec` which required a
heap allocation as well as prevented statically proving maximum length.
Adding a specialized type that holds a byte array and size solves this.
The solution is very similar to `secp256k1::ecdsa::SerializedSignature`.
The difference is that serialized signature in this crate contains
sighash bytes flag while in `secp256k1` it doesn't.
Script parsing is composed of several functions which implicitly rely on
various properties. Adding a type that restricts the valid values makes
local review easier.
So far we deserialized hex into `Vec<u8>` at run time. This was mainly
in tests where it had negligible performance cost. However moving the
computation to compile time has a few benefits: it allows proving the
length of the decoded bytes and identifies potential typos before the
code goes through LLVM and other compilation machinery which makes
feedback faster.
This change uses the `hex_lit` crate to move computation to compile
time. It is implemented as `const` declarative macro which doesn't blow
up compilation time.
a121e19e94 hashes: Implement AsRef for fixed size arrays (Tobin C. Harding)
Pull request description:
Implement `AsRef<[u8; X]>` for hash types including wrapped hash types. Doing so means at times the compiler can no longer infer the type because we have `AsRef<[u8]` implemented also but we can use `into_inner` and `as_inner` to get the inner array if needed.
Fix: #1462
## Note
This touches code that will likely be changed by #1577 and when we do #1491 but I believe its a step forward.
ACKs for top commit:
arturomf94:
ACK [`a121e19`](a121e19e94)
apoelstra:
ACK a121e19e94
Kixunil:
ACK a121e19e94
Tree-SHA512: 257c44826c7649db25bb3a6f023f68b2f17b70c546a056afad044bc8a16bf61f654c3846222505aaf5e6f9a0ad1d2113272d61317b407d0ac83702e41060a1ee
c3cc9e52ab Fix absolute lock time examples and tests (Tobin C. Harding)
Pull request description:
An absolute lock time of 100 is nonsensical because we are well past block 100. This value was used because it makes sense for _relative_ locktimes but for absolute lock times it makes the examples and tests slightly confusing.
ACKs for top commit:
apoelstra:
ACK c3cc9e52ab
Kixunil:
ACK c3cc9e52ab
Tree-SHA512: f490ef111bce0989c4ce8300c507c21b454448af4a91b9ef7a2fc05407411ca8721c9caa3dd1f0e8c0c133c4892c5c512f2d881af2cc67ae843d87eacae76ef1
4a03e2e721 psbt: Remove unused error variant (Tobin C. Harding)
Pull request description:
Remove an unused error variant for PSBT code (API breaking because the error type is public).
Woops, somehow I managed to get what was patch 1 of this series merged yesterday, I thought I left it out. Anyways, this is just the remove unused error variant now. No changes to that patch from previous versions of the PR.
ACKs for top commit:
apoelstra:
ACK 4a03e2e721
Kixunil:
ACK 4a03e2e721
Tree-SHA512: 228c661b97c6656db5a2bcc9ceb494ea485363b7f7262a97c677ee1639b5209c92ec3715ff48fdb108c95c828bfc83b6c475aa66f0ce8c5b0f286bfa7cc19554
An absolute lock time of 100 is nonsensical because we are well past
block 100. This value was used because it makes sense for _relative_
locktimes but for absolute lock times it makes the examples and tests
slightly confusing.
dd316e4d14 pow: Remove Mul/Div by arbitrary integer types (Tobin C. Harding)
Pull request description:
When we added `Target` and `Work` types we implemented multiplication and division by anything `Into<u64>`, this is not typically done in the Rust stdlib and also is semantically incorrect for the types.
Remove `Mul` and `Div` impls from `Target` and `Work`. Also remove `Mul<T>` for `T: Into<u64>` from the private `U256` type.
Fix#1632
ACKs for top commit:
apoelstra:
ACK dd316e4d14
Kixunil:
ACK dd316e4d14
Tree-SHA512: ede53555844adab321ff344535b7b8bab3c5c73855823dfc3ad728b077ae199451b7e22a1d203ef73a076073b7f0cbf9637cefa5fe82fc78ab454d02fa0b62b9
When we added `Target` and `Work` types we implemented multiplication
and division by anything `Into<u64>`, this is not typically done in the
Rust stdlib and also is semantically incorrect for the types.
Remove `Mul` and `Div` impls from `Target` and `Work`. Also remove
`Mul<T>` for `T: Into<u64>` from the private `U256` type.
272cdbcf7c Flatten the types directory (Tobin C. Harding)
Pull request description:
We recently created a `types` subdirectory under `script` to keep all the `Script` and `ScriptBuf` impls together. Turns out this additional level of subdirectory is a bit annoying and we can achieve the same grouping by just using `script/mod.rs`.
Move code from `types/mod.rs` to `script/mod.rs`, move the two submodules up a level, remove the `types` directory.
Fix: #1640
ACKs for top commit:
Kixunil:
ACK 272cdbcf7c
apoelstra:
ACK 272cdbcf7c
Tree-SHA512: 91fd78084829fa24f3b6420602d7d5094670647fff43e6e193d6de3126f1657132873ea133540d87db7d0d4dfc4cb9666489e39c861377085ce0254da81fd564
ae2aaaa436 Add `script_pubkey_lens` method (Martin Habovstiak)
cf068d16b0 Implement transaction weight prediction (Martin Habovstiak)
Pull request description:
When creating a transaction one must know the the fee beforehand to set
appropriate amounts for outputs and to know the fee, weight is required.
So far we only had a method on an already-constructed transaction. This
method clearly wasn't helpful when constructing the transaction except
for hacks like temporarily adding an all-zeroes signature.
This change adds a function that can compute the transaction weight
without knowing individual bytes of the scripts, witnesses and other
elements. It only needs to know their sizes.
To make the API less error-prone a special, trivial, type is also added
for computing the lengths of witnesses.
Based on #1627
ACKs for top commit:
apoelstra:
ACK ae2aaaa436
tcharding:
ACK ae2aaaa436
Tree-SHA512: 55376601c2c2826bb0909cc25ff5b65816f0b1a2d57fb2cd8831f3db5382de0f4a364d518b312f0528bb5f44c30f3f74f8d254145eed2bfd65e2332b7c4d7c8b
6be89bf94f Add `minimal_non_dust` to `TxOut` (Martin Habovstiak)
Pull request description:
In some scenarios it's useful to create outputs with minimal relayable value. E.g. outputs designated for fee bumping using CPFP. A method for this is useful.
This implements a constructor of `TxOut` that computes the minimal non-dust value from the passed script.
Closes#1459
This one is quite easy, so if we could get it in 0.30, that'd be great.
ACKs for top commit:
apoelstra:
ACK 6be89bf94f
tcharding:
ACK 6be89bf94f
Tree-SHA512: f31ae5f649fbba95ccaabf465cb814df193e7ef89c6e0de7b316a2a484e172beada0da8851da96b195a69a4da1b0991741d4c119f9b0c94fff34150e4f033bd5
We recently created a `types` subdirectory under `script` to keep all
the `Script` and `ScriptBuf` impls together. Turns out this additional
level of subdirectory is a bit annoying and we can achieve the same
grouping by just using `script/mod.rs`.
Move code from `types/mod.rs` to `script/mod.rs`, move the two
submodules up a level, remove the `types` directory.
In some cases people construct the transaction with a dummy fee output
value before calculating the weight. A method to create the iterator
over `script_pubkey` lengths is useful in such cases.
097e4e9c7f Fix license on bip158 module (Tobin C. Harding)
Pull request description:
When we introduced the SPDX license blurb in [0] we incorrectly gave attribution to Andrew when the original file author had the attribution as "the rust-bitcoin developers". The original author [1] was Tamas Blummer and he copied this code from code he wrote and explicitly re-licenses it. In order to make the re-licensing comment a little clearer and fix the mis-attribution use Tamas' name in the attribution.
[0] commit: `91ff2f628ce7db732d234a812e29fa8508f501a1 Introduce SPDX license identifiers`
[1] commit: `c93a70487f81a93c7d479ae046c75590d9fb7733 Add client side block filter (BIP158) (#281)`
ACKs for top commit:
apoelstra:
ACK 097e4e9c7f
Kixunil:
ACK 097e4e9c7f
Tree-SHA512: cb80d32c739ad562b2d657a34355bb28b1dd5c477b03018fbfbb14de40e03b806663aee89b578bcd8c681b067aa8d02611d4cde36e6fb9a8fa84ad4baf2e290e
6d99d3c061 Use ignore to stop rustdoc code from being built (Tobin C. Harding)
Pull request description:
Currently we have an attempted tag ```compile_fail that seems to be aiming at allowing code that does not build to exist in rustdoc. This is causing an error when running tests.
No clue how this made it through CI.
Use ```ignore to prevent rustdoc code from being built.
ACKs for top commit:
apoelstra:
ACK 6d99d3c061
Kixunil:
ACK 6d99d3c061
Tree-SHA512: 6c4b076000ba29377ac8cf942df66e849ff6421da6f9214664d487550cf45889e163b4de652079010bae327019163b63a1962ff8e6a04d918db63ffb0285ccd1
5f86b3091c Add From<Address> for ScriptBuf (Tobin C. Harding)
Pull request description:
Add an implementation of `From<Address> for ScriptBuf` that calls through to `address.script_pubkey` (which calls
`address.payload.script_pubkey()`).
Fix: #1457
ACKs for top commit:
apoelstra:
ACK 5f86b3091c
Kixunil:
ACK 5f86b3091c
Tree-SHA512: 8a45f292578765b345863946b276607d561b9bc75f6b9bb97f48b32d503143e234aedb658997db802c87289576361ec9ee6cb31fe3bbccfc06cc2fdabc7c41bb
In some scenarios it's useful to create outputs with minimal relayable
value. E.g. outputs designated for fee bumping using CPFP. A method for
this is useful.
This implements a constructor of `TxOut` that computes the minimal
non-dust value from the passed script.
Closes#1459
When creating a transaction one must know the the fee beforehand to set
appropriate amounts for outputs and to know the fee, weight is required.
So far we only had a method on an already-constructed transaction. This
method clearly wasn't helpful when constructing the transaction except
for hacks like temporarily adding an all-zeroes signature.
This change adds a function that can compute the transaction weight
without knowing individual bytes of the scripts, witnesses and other
elements. It only needs to know their sizes.
To make the API less error-prone a special, trivial, type is also added
for computing the lengths of witnesses.
a7117bf8f1 Document source of logic fro read_scriptint (Tobin C. Harding)
2eb2420b40 Add comment on rountripping read/write scripint (Tobin C. Harding)
657dd51e8b Use OP_0 to better mimic bitcoin core code (Tobin C. Harding)
31d254a6a8 Fix push operators URL (Tobin C. Harding)
84cd4ca964 Deprecate script::read_uint (Tobin C. Harding)
Pull request description:
Patch one does the deprecation, the rest of the PR is made up of tiny improvements to the code around reading/writing 'scriptint's (conceptually `CScriptNum`s). I did all this while trying to decipher the discussion on #1547.
### Note Please
There are many more changes in the pipeline for all this read/write "script int" stuff. This PR was done ages ago and I believe it stall adds value.
I re-did the whole PR manually because of the recent `script` module changes. I hope no one else has to do that - if you do please feel free to holla and I'll "rebase" your PR for you.
ACKs for top commit:
Kixunil:
ACK a7117bf8f1
apoelstra:
ACK a7117bf8f1
Tree-SHA512: 5e8ee7fa8d1393a1a50e4241dd947b837cc0ddd15ff1239a49e4839489459fb95d184d6773f73633d55c436310bfab0c73f806d492ed4a4215f924c6c0993936
1e0e712bb0 Add push_* methods for lock times (Tobin C. Harding)
Pull request description:
Lock times are `u32` and can require encoding using 5 bytes.
Add methods `push_lock_time` and `push_sequence` for pushing absolute lock times and sequence numbers. We do not push relative locktimes because they are only 16 bits from the original sequence number.
ACKs for top commit:
Kixunil:
ACK 1e0e712bb0
apoelstra:
ACK 1e0e712bb0
Tree-SHA512: 4b511679270e7ef73937259ccf7d1b9b4b7512b2464f302310519a6e02d55c9cc24e3559302aeb671156e68130478258c1c565f474880e8be708b0ee234e67ff
861fdd6ab1 Put the `MerkleBlock` struct at the top of the file (Tobin C. Harding)
f0d968197a Put error at the bottom of the file (Tobin C. Harding)
19e094788f Use self for Error variant imports (Tobin C. Harding)
83c2a552db Put helper function below where its called (Tobin C. Harding)
5076579fb9 Fix indentation in pmt_tests macro (Tobin C. Harding)
a7edbfb52e Move hex data to tests/data (Tobin C. Harding)
Pull request description:
PR 2 in the `merkle_tree::block` series, used to be on top of the now merged #1374.
Do a bunch of refactorings in preparation for more invasive changes. This is a separate PR because, other than the first patch which moves hex strings to `tests/data/` the other patches are refactoring only patches, no logic changes. However the last patch is big and will be annoying to review - sorry about that. If you really oppose this basically stylistic patch putting important things first, the opposite of C code, please say and I'll try to stop doing it.
ACKs for top commit:
Kixunil:
ACK 861fdd6ab1
apoelstra:
ACK 861fdd6ab1
Tree-SHA512: 3da0a600898f490b602ab05a396061587d86ffef55697877885a8c611eff96e7382a2d816fe9594c100d378dc56fe7fdc88009a0343bc602b7f4c180836adbd3
Lock times are u32 and can necessitate encoding using 5 bytes. As such
they are "special".
Add methods `push_lock_time` and `push_sequence` for pushing absolute
lock times and sequence numbers. We do not push relative locktimes
because they are only 16 bits from the original sequence number.
Our `script::read_scriptint` function is based on the constructor
code (incl. call to `set_vch`) code from Bitcoin Core. Add rustdoc
comment saying so, emit a link because there are already multiple links
to `script.h` in this file (one just right below the added comment).
We only support reads of upto 4 bytes where as Bitcoin Core allows
reading a `CScriptNum` with more bytes than that. Add a rustdoc
comment (incl. link to Bitcoin Core) mentioning that.
Our `Builder::push_int` method is the same as Bitcoin Core `CScript`
`push_int64` method. We currently use `OP_FALSE` (equivalent to `OP_0`)
but recently we added `OP_0`, lets use it to make our code better mimic
Core (also saves devs checking that `OP_FALSE` is the same as `OP_0`).
The `MerkleBlock` struct is the main type in this file, put it at the
top of the file. This leaves the next most important type,
`PartialMerkleTree` below that.
Refactor only, no logic changes.
70cf4515db Add `Weight` and `FeeRate` newtypes (Martin Habovstiak)
Pull request description:
Use of general-purpose integers is often error-prone and annoying. We're working towards improving it by introducing newtypes.
This adds newtypes for weight and fee rate to make fee computation easier and more readable. Note however that this dosn't change the type for individual parts of the transaction since computing the total weight is not as simple as summing them up and we want to avoid such confusion.
Part of #630
Replaces #1607 (I want to get this in quickly and don't want to be blocked on DanGould's availability.)
ACKs for top commit:
apoelstra:
ACK 70cf4515db
tcharding:
ACK 70cf4515db
Tree-SHA512: ab9cc9f554a52ab0109ff23565b3e2cb2d3f609b557457b4afd8763e3e1b418aecbb3d22733e33304e858ecf900904a1af6e6fdc16dc21483b9ef84f56f103b2
a9108d3939 Refactor script module (Tobin C. Harding)
Pull request description:
The `script` module is large and unwieldy.
Refactor the `script` module, splitting it up into a tree of modules. Here are a few of the changes and their stated benefits
- Split the two script types out into separate files: Readers of the methods can then tell immediately from the file name which type they are reading.
- Put all the impls for the two script types together: Makes parsing the API easier because one can more quickly see which traits are implemented on what i.e., all the `AsRef` imlps are grouped together.
- Put the impls for the two script types in order, first `Script` then `ScriptBuf`: Makes it easier for us to see if we missed something.
- Put the `Builder` and `Instruction` (and associated) types in their own modules: Some devs find long files hard to navigate, so far there hasn't been too much push back against short files.
- Put tests in a separate file: This idea was recently discussed.
This is only moving code and fixing import statements etc. No other changes to the code.
## Note to reviewers
This PR is impossible to review from the diff because it moves so much code. Perhaps better to look at the resulting `src/blockdata/script/` directory and see if you like it.
#### Motivation
While adding script tagging I was having difficulty navigating the script module.
ACKs for top commit:
apoelstra:
ACK a9108d3939
Kixunil:
ACK a9108d3939
Tree-SHA512: 19123c8cfbdce6c42b322fa75a74073a0114b0ed21bd06ca5727981b3573b74cf05075723b774b92ae2b497e20644fca6e2fac14e30cc44f2802dde5aa567f66
Use of general-purpose integers is often error-prone and annoying. We're
working towards improving it by introducing newtypes.
This adds newtypes for weight and fee rate to make fee computation
easier and more readable. Note however that this dosn't change the type
for individual parts of the transaction since computing the total weight
is not as simple as summing them up and we want to avoid such confusion.
Part of #630
32d2d62e0f Rename from_slice methods to decode (Tobin C. Harding)
Pull request description:
The `TaprootMerkleBranch` and `ControlBlock` both have methods on them called `from_slice` but these methods do more that just basic copy from a slice. `decode` is a more descriptive name.
Deprecate the `from_slice` methods and implement `decode`, on other changes to the logic.
cc sanket1729
ACKs for top commit:
apoelstra:
ACK 32d2d62e0f
Kixunil:
ACK 32d2d62e0f
Tree-SHA512: e8c089545411a214ef9393f65d3990be46983000bd045182cc27dd70b62273bf48ac97adaf89d1e7fc807c72964a01eef176c7685684e8f87a01c219746d6d3d
86f372774b Add '_ back into the BitStreamWriter (Tobin C. Harding)
Pull request description:
Recently we merged `commit 53d4fe66b57c255086def2b5e47afaddee776b75` to fix CI even though a better approach is to use `'_` because it assists reading the code (shows that the bit stream writer is not writing from a reference since its writing a `Copy` type `n`).
Add back in the `'_` (I forget what its called).
ACKs for top commit:
apoelstra:
ACK 86f372774b
Kixunil:
ACK 86f372774b
Tree-SHA512: 2a9989164562dbe7bf133e3aeb090fbff7831bfeefb0ac8431e75b17d57184c4d60ac206578c6ebbcff903a3832502a162027ed9f37e5ed87e42a6bf61efa594
The `script` module is large and unwieldy.
Refactor the `script` module, splitting it up into a tree of modules.
Here are a few of the changes and their stated benefits
- Split the two script types out into separate files: Readers of the
methods can then tell immediately from the file name which type they are
reading.
- Put all the impls for the two script types together: Makes parsing the
API easier because one can more quickly see which traits are implemented
on what i.e., all the `AsRef` imlps are grouped together.
- Put the impls for the two script types in order, first `Script` then
`ScriptBuf`: Makes it easier for us to see if we missed something.
- Put the `Builder` and `Instruction` (and associated) types in their
own modules: Some devs find long files hard to navigate, so far there
hasn't been too much push back against short files.
- Put tests in a separate file: This idea was recently discussed.
This is only moving code and fixing import statements etc. No other
changes to the code.
The `TaprootMerkleBranch` and `ControlBlock` both have methods on them
called `from_slice` but these methods do more that just basic copy from
a slice. `decode` is a more descriptive name.
Deprecate the `from_slice` methods and implement `decode`, on other
changes to the logic.
75b266a129 Improve `sighash` module documentation (Martin Habovstiak)
Pull request description:
"Sighash" is a technical term that newbies in Bitcoin may not know and could get lost when trying to find how to sign a transaction. This change attempts to make it more obvious that this module is needed for signing.
Closes#1463
ACKs for top commit:
tcharding:
ACK 75b266a129
apoelstra:
ACK 75b266a129
Tree-SHA512: 7157566c1639c63ce0fba2832e8e5e846e689d89e24077ed7769b721c5db4613cd7fd8d91464992eb78de74b42912ca877e7182a9c3c9c8848bf94d89767b8cc
b3188bbac3 Add `Transaction` accessors to `SighashCache` (Martin Habovstiak)
7c6854fe02 Use `Borrow` instead of `Deref` in `SighashCache` (Martin Habovstiak)
Pull request description:
This changes the bound from `Deref<Target = Transaction>` to `Borrow<Transaction>` (with respective `mut` changes) and adds accessors.
Closes#1423 (PSBT stuff will be separate issue).
ACKs for top commit:
tcharding:
ACK b3188bbac3
apoelstra:
ACK b3188bbac3
Tree-SHA512: 9db2c5890b26e9eefd483d697b42e84b1d7d3b8676fc39b4f39075c149e12697aa538828a757f9187578a958d72a592bb913f8f5788c93feb273db5370979d99
118a593c89 Implement from arrays for TaprootMerkleBranch (Tobin C. Harding)
Pull request description:
The `TaprootMerkleBranch` contains a vector of `TapNodeHash`s, as such it can trivially be constructed from an array of the same type.
Implement `From` for all array sizes 1 - 128 inclusive.
Fix: #1469
ACKs for top commit:
Kixunil:
ACK 118a593c89
apoelstra:
ACK 118a593c89
Tree-SHA512: dd497abd9143ea8b43485133beaccac9049fb915a95a3422d41c1f99961b59ec95df93efe759aa02f62ba1cf3e1afc4597671f1202ff0fa78eeee8b305d21305
The `TaprootMerkleBranch` contains a vector of `TapNodeHash`s, as such
it can trivially be constructed from an array of the same type.
Implement `From` for all array sizes 1 - 128 inclusive.
Tobin C. Harding
Martin Habovstiak
Andrew Poelstra
Harshil Jani