In order to move towards our own I/O traits in the `rust-bitcoin`
ecosystem, we have to slowly replace our use of the `std` and
`core2` traits.
This is the final step in removing the explicit `core2` dependency
for I/O in no-std - replacing the `io::Error` type with our own.
Sadly the `std::io::Error` type requires `std::error::Error` as a
bound on the inner error, which is rather difficult to duplicate in
a way that allows for mapping to `std` and back.
To take a more general approach, we use bound on any `Debug`
instead.
In order to move towards our own I/O traits in the `rust-bitcoin`
ecosystem, we have to slowly replace our use of the `std` and
`core2` traits.
Here we take the second big step, replacing
`{std,core2}::io::Read` with our own `bitcoin_io::io::Read`. We
provide a blanket impl for our trait for all `std::io::Read`, if
the `std` feature is enabled, allowing users who use their own
streams or `std` streams to call `rust-bitcoin` methods directly.
With the new `bitcoin_io` library, implementing `io::Write`
manually is somewhat tricky - for `std` users we really want to
provide an `std::io::Write` implementation, however for `no-std`
users we want to implement against our internal trait.
Sadly we cannot provide a blanket implementation of
`std::io::Write` for all types whcih implement our `io::Write`
trait as its an out-of-crate impl.
Instead, we provide a macro which will either implement
`std::io::Write` or our `io::Write` depending on the feature flags
set on `bitcoin_io`.
In order to move towards our own I/O traits in the `rust-bitcoin`
ecosystem, we have to slowly replace our use of the `std` and
`core2` traits.
Here we take the first real step, replacing
`{std,core2}::io::Write` withour own `bitcoin_io::io::Write`. We
provide a blanket impl for our trait for all `std::io::Write`, if
the `std` feature is enabled, allowing users who use their own
streams or `std` streams to call `rust-bitcoin` methods directly.
Since we are no longer relying on the blanket `io::Write` impl for
`&mut io::Write`, we should now ensure that we do not require
`Sized` for our `io::Write` bounds, as its unnecessarily
restrictive and can no longer be worked around by simply adding an
`&mut`.
`std::io::Write` is implemented for all `&mut std::io::Write`. This
makes it easy to have APIs that mix and match owned `Write`s with
mutable references to `Write`s.
However, in the next commit we add our own `Write` trait which we
intend to implement for all `std::io::Write`. Sadly, this is
mutually exclusive with a blanket implementation on our own
`&mut Write`, as that would conflict with an `std::io::Write`
blanket impl.
Thus, in order to use the `Write for all &mut Write` blanket impl
in rust-bitcoin, we'd have to bound all `Write`s by
`std::io::Write`, as we're unable to provide a blanket
`Write for &mut Write` impl.
Here we stop relying on that blanket impl in order to introduce the
new trait in the next commit.
In the coming commits we'll move our `io` module to having its own
implementations of the usual I/O traits and structs. Here we first
move to re-exporting only exactly what we need, allowing us to
whittle the list down from a fixed set.
In order to support standard (de)serialization of structs, the
`rust-bitcoin` ecosystem uses the standard `std::io::{Read,Write}`
traits. This works great for environments with `std`, however sadly
the `std::io` module has not yet been added to the `core` crate.
Thus, in `no-std`, the `rust-bitcoin` ecosystem has historically
used the `core2` crate to provide copies of the `std::io` module
without any major dependencies. Sadly, its one dependency,
`memchr`, recently broke our MSRV.
Worse, because we didn't want to take on any excess dependencies
for `std` builds, `rust-bitcoin` has had to have
mutually-exclusive `std` and `no-std` builds. This breaks general
assumptions about how features work in Rust, causing substantial
pain for applications far downstream of `rust-bitcoin` crates.
Here, we add a new `bitcoin_io` crate, making it an unconditional
dependency and using its `io` module in the in-repository crates
in place of `std::io` and `core2::io`. As it is not substantial
additional code, the `hashes` io implementations are no longer
feature-gated.
This doesn't actually accomplish anything on its own, only adding
the new crate which still depends on `core2`.
12d615d900 Use network when calculating difficulty (Tobin C. Harding)
62af5b54f3 Improve difficulty rustdocs (Tobin C. Harding)
Pull request description:
The difficulty is a ratio of the max and current targets, since the max is network specific the difficulty calculation is also network specific.
We already have network specific maximum target constants, use them when calculating the difficulty.
Patch 1 is a trival docs improvement to `block::Header::difficulty`.
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apoelstra:
ACK 12d615d900
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01e2233f6c Remove deprecated since NEXT-RELEASE (Tobin C. Harding)
Pull request description:
Not sure what happened here but our release job didn't catch this? We should have updated this to "since = 0.31.0" before release. Since we only deprecate for one release lets go ahead and remove this.
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clarkmoody:
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Kixunil:
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7f75447c1d Make Payload private and inline functionality (Tobin C. Harding)
b12bf07232 Make the AddressEncoding type private (Tobin C. Harding)
Pull request description:
The `AddressEncoding` and `Payload` types are implementation details and should never have been public. Make them private.
Fix: #1908
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Currently we have functions on `Address` that call through to a public
`Payload` type. The `Payload` type is an implementation detail and
should never have been public. In preparation for modifying the
`AddressInner` and removing `Payload` altogether lets move all the
functionality from `Payload` into `Address` - this is basically just
code moves so it is feasible to review with some confidence.
This is an API breaking change because it makes `Payload` private and
also removes from the pubic `Address` API functions that accept and
return `Payload`. Apart from that the changes can be seen as
refactoring.
The `AddressEncoding` type exists solely to assist us in implementing
`Display` on `Address`, it may have been used in the past by alt-coins
back when we had a more tolerant outlook on supporting them. Nowadays
we explicitly do not support alts.
2c33744baa Remove code deprecated since v0.31.0 (Tobin C. Harding)
Pull request description:
We only deprecate for a single release.
Remove all code deprecated since `v0.31.0`.
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Not sure what happened here but our release job didn't catch this? We
should have updated this to "since = 0.31.0" before release. Since we
only deprecate for one release lets go ahead and remove this.
71454d438a Use hash_type macro for sha512::Hash (Tobin C. Harding)
d51c1857fd sha512: Move from_engine functions (Tobin C. Harding)
Pull request description:
This PR does not introduce any logic changes.
- Patch 1 is a code move.
- Patch 2 uses the `hash_type!` macro to define the `sha512::Hash` type.
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apoelstra:
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0bb537d45b Move sha512_256 code (Tobin C. Harding)
Pull request description:
Make the `sha512_256` module use similar code layout to the other hash modules by putting the call to `hash_type` at the top followed by the `from_engine` function.
Code move only, no other changes.
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ACK 0bb537d45b
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The difficulty is a ratio of the max and current targets, since the
max is network specific the difficulty calculation is also network
specific.
We already have network specific maximum target constants, use them when
calculating the difficulty.
Make the `sha512_256` module use similar code layout to the other hash
modules by putting the call to `hash_type` at the top followed by the
`from_engine` function.
Code move only, no other changes.
Currently we are defining the `sha512::Hash` type manually instead of
using the `hash_type` macro.
The generated code using the macro is identical to that without
it (although I didn't actually look at the generated code :)
e21ee381bc Split Prevouts errors out into specific error types (Tobin C. Harding)
Pull request description:
Done as part of the great error clean up.
Currently we are returning a general `Error` from `Prevouts` functions, this is un-informative, we can do better by returning specific types that indicate the exact error path.
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apoelstra:
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d6298fe711 Use capital B for Bitcoin in rustdoc (Tobin C. Harding)
bcfabc3556 Fix typo, missing word (Tobin C. Harding)
Pull request description:
In an effort to make review merge quicker push these two changes up as a separate PR.
Totally trivial.
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fde6479c6a Create uniform build script (yancy)
Pull request description:
Previously, each unique compiler cfg attribute that appeared in the codebase was hard coded and emitted to stdout at compile time. This meant keeping the file up to date as different compiler cfg attributes changed. It's inconsequential to emit a compiler version that's not used, so this change just emits all possibilities to reduce the maintenance burden of the build script.
Note that there is a bit of diff noise in one of the `build.rs` since I simply did a copy of one to the other to make them uniform.
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Improve the public exports in two ways:
1. Inline re-exports into the docs of the module that re-exports them.
2. Separate public and private use statements
Recently we discussed a way to separate the public and private import
statements to make the code more clear and prevent `rustfmt` joining
them all together.
Separate public exports using a code block and `#[rustfmt::skip]`. Has
the nice advantage of reducing the number of `#[doc(inline)]` attributes
also.
1. Modules first, as they are part of the project's structure.
2. Private imports
3. Public re-exports (using `rustfmt::skip` to prevent merge)
Use the format
```rust
mod xyz;
mod abc;
use ...;
pub use {
...,
};
```
This patch introduces changes to the rendered HTML docs.
Done as part of the great error clean up.
Currently we are returning a general `Error` from `Prevouts` functions,
this is un-informative, we can do better by returning specific types
that indicate the exact error path.
Add two signing examples to showcase signing a simple one input two
output transaction using both segwit v0 outputs and taproot outputs.
This patch is the result of the recent rust-bitcoin TABConf workshop,
wit bug fix by Sanket, updated to use APIs from tip of master branch.
This code, depending on v0.30.0 is what is being introduced to the
cookbook at the moment.
In an effort to consolidate knowledge spread out over time in various
places on GitHub add a `Policy` section to `CONTRIBUTING.md`.
Add initial sections on import statements, errors, rustdocs,attributes,
and licensing.
Previously, each unique compiler cfg attribute that appeared in the
codebase was hard coded and emitted to stdout at compile time. This
meant keeping the file up to date as different compiler cfg attributes
changed. It's inconsequential to emit a compiler version that's not
used, so this change just emits all possibilities to reduce the
maintenance burden of the build script.
efedf862b0 bitcoin: Bump version number to v0.31.0 (Tobin C. Harding)
Pull request description:
In preparation for release of v0.31.0 bump the version number.
The changelog is already up to date because we have done two RC releases.
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2ecab31f94 Remove stale comment and map_err (yancy)
b166442fb0 Replace hex_psbt macro with test helper function (yancy)
9e4a784b8b Move psbt macro to the psbt test module (yancy)
Pull request description:
Remove `#[cfg(test)]` and the macro `psbt_with_values` from macros.rs and place it in the tests module for psbt.
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tcharding:
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2a891e0be8 Add a missing link to #2006 in 'bitcoin/CHANGELOG.md' (lateminer)
Pull request description:
In the changelog, there is a wrong link to #2006.
Additionally, a link and description for #2020 are missing.
This PR addresses these minor issues.
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Matt Corallo
Andrew Poelstra
Tobin C. Harding
Martin Habovstiak
yancy
lateminer