rust-bitcoin

consensus_encoding: Update API files

consensus_encoding: Add decode_from_*_with functions

Currently, users of the old encoding traits can call functions to
decode many types (like Vec<u8> or u64) from byte slices. With the new
encoding/decoding traits, there exists no convenient method for users
to decode types without a dedicated Decode impl.

Introduce decode_from_*_with variant functions that are generic on
Decoder + Default instead of Decode.

io: Introduce decode_from_read_with function

Currently, users of the old encoding traits can call functions like
reader.read_compact_size. With the new encoding/decoding traits, there
exists no convenient method for users to interact with bitcoin io
readers with decoders that don't have a dedicated Decode implementer.

Introduce decode_from_read_with variant function that is generic on
Decoder + Default instead of Decode.

taproot: Remove From<&Signature> for SerializedSignature

The From<&'a Signature> for SerializedSignature impl functions by
derefing the signature and then serializing it. The presence of the
trait implies that SerializedSignature is some sort of reference to
the signature, when it is instead a type owning its own data.

Remove From<&Signature> impl from taproot::SerializedSignature.

2026-06-07 automated rustfmt nightly

Bump key-expression crate version

With the bip32 module moved, the key-expression crate should now have
a new version release before the next bitcoin release.

Bump key-expression version number to 0.1.0.
Update changelog.
Adjust bitcoin manifest to match new version number.
Update lock files.

Automated update to Github CI to cargo-semver-checks version-0.48.0

Add From<Infallible> to sighash errors

In order to facilitate use in generics, all error types should have a
From<Infallible> implementation.

Add From<Infallible> to all sighash error types.

Make sighash error fields private

The sighash error types in crypto currently all have pub fields. This
prevents any future changes to their structure after a 1.0 and is not
required for any functionality.

Make all inner fields in sighash errors pub(super) or pub(crate).

Automated update to rustc stable-1.96.0

p2p: error on `CommandString` interior null bytes

Add an invariant that a `CommandString` cannot have a null byte
preceding a non null byte as part of the command string.

Implement fmt::LowerHex and fmt::UpperHex for Witness

The Witness type can be constructed from a hex string via from_hex but
provides no way to render itself back to hex. Other types in primitives
expose hex rendering through fmt::LowerHex (the to_hex functions were
deprecated in favour of it), so Witness should follow the same
convention.

Implement fmt::LowerHex and fmt::UpperHex for Witness by delegating to
the existing HexPrimitive helper, which formats the consensus encoding
as hex. Add tests covering empty and non-empty witnesses for both cases
and record the new trait impls in the public API surface.

See #6314

bitcoin: port 0.32.x changelog entries to master

Co-authored-by: Tobin C. Harding <me@tobin.cc>

Fixup changelog links and follow new policy

* Fixup off-by-one error in `bitcoin` links.
* bip158 does not have any tags yet.
* Not adding links for 0.32.x tags, the diff compare gets a little
wonky as the branch drifts further from master.
* `internals` and `units` have some inconsistent tag formatting.

Drop all links which are not helpful compares. Links to a single tag
are not all the helpful and niether is comparing to the beginning of time.

crypto: Gate all usage of hex-conservative behind hex feature

Typically, all of the crates upstream of bitcoin have a hex feature
that gates the usage and inclusion of the hex-conservative crate.
Since the crypto crate functionality was crudely pulled from bitcoin,
this feature was not present but instead baked in as part of the
default functionality.

Introduce a hex feature which gates hex 1.1.0.
Add hex feature gates as necessary for existing functionality.

Update API files

consensus_encoding: Add hex decoding function

Building on the iter decoding functionality, the use of the hex feature
can also provide a decode_from_hex function that allows users to
directly decode a hex &str to a type, without working via a heap vec
and using decode_from_slice.

Introduce decode_from_hex for decoding hex &str to decode types without
heap allocations.

consensus_encoding: Add hex encoding helpers

By pairing hex 1.1 with the existing EncoderByteIter, it's trivial to
introduce hex encoding support into consensus encoding. This simplifies
hex encoding for consensus objects for downstream users.

Add drain_to_hex and encode_to_hex for encoding objects to hex String.

primitives: Move block test to tests

This test uses the `include_bytes!` macro to include data from a file
that lives in `tests` but we exclude that directory when publishing.
Resulting in published source code having broken unit tests.

Move the test to `tests/`.

Clean up stale duplicate dep overrides

primitives: Avoid allocating claimed size when decoding witness length

Avoid allocating the claimed size when decoding witness length.

It's currently possible to claim a length and have the decoder
reserve up to `MAX_VECTOR_ALLOCATE` before any data bytes have
arrived, just from reading the length prefix.

Instead, we can reserve only the prefix, and let the buffer grow incrementally
as bytes arrive.

CI: Fix nightly toolchain update to mention weekly

This job runs weekly not daily. Update the branch name and PR title.

consensus_encoding: Use crate alias in test code

`bitcoin_consensus_encoding` is one hell of a mouthful. Add an alias
to `encoding`.

Test code only.

Run the formatter

Destructure error types in source impls

In the source impls of error types, we previously decided to use
explicit impls to try to prevent changes in the error type from
introducing errors. However, impls that simply return None do not help
to solve this issue.

Add a complete error type destructure to all None source impls to catch
future error shape changes.

Remove double allocation from ScriptBuf::from_hex_prefixed

The ScriptBuf::from_hex_prefixed essentially takes a hex string and
consensus decodes to a ScriptBuf object. Currently it requires two
allocations to do so as the hex is decoded to a byte vec and then
copied into an owned buffer on the type. By using the HexPrimitive
iterator, this can be avoided.

Remove decode_to_vec allocation from ScriptBuf::from_hex_prefixed.