Custom fork of rust-bitcoin with unsafe modifications for higher speed. Unsuitable for production.
Go to file
Christian Reitter ef150c56fa Document unsafe and unsupported nature of this fork 2024-04-27 14:01:57 +02:00
.github CI: Enable sync-labels for labeler 2024-04-26 08:49:57 +10:00
base58 Enable internals "alloc" feature 2024-04-04 08:18:51 +11:00
bitcoin Use special vendoring version, force use of vendored rust-secp256k1 dependency 2024-04-27 13:19:39 +02:00
contrib Upgrade secp dependency 2024-04-03 09:24:41 +11:00
fuzz Merge rust-bitcoin/rust-bitcoin#2635: Add set -euo pipefail 2024-03-27 18:14:42 +00:00
githooks Update pre-commit hook to use pinned nightly 2024-04-04 15:42:42 +11:00
hashes docs: Make rustdoc imports more terse 2024-04-25 10:53:56 +10:00
internals Allow needless-borrows-for-generic-args 2024-04-02 11:40:41 +11:00
io 2024-04-14 automated rustfmt nightly 2024-04-14 01:21:26 +00:00
logo Add Rust-Bitcoin logo and project header. 2022-03-22 20:30:33 -06:00
units Fix kani test 2024-04-19 06:15:49 +10:00
.actrc feat: Support running CI locally with `act` 2022-02-17 21:11:30 +01:00
.gitignore fix and to use generated lists of targets 2023-04-27 00:24:52 +00:00 Add backport section to contributing docs 2024-04-19 05:50:32 +10:00
Cargo-minimal.lock bitcoin: Bump version to 0.32.0-rc1 2024-04-05 08:10:08 +11:00
Cargo-recent.lock bitcoin: Bump version to 0.32.0-rc1 2024-04-05 08:10:08 +11:00
Cargo.toml base58: Re-name crate to base58ck 2024-03-19 09:00:46 +11:00
LICENSE Add LICENSE file with CC0 in it 2014-07-18 17:37:13 -07:00 Document unsafe and unsupported nature of this fork 2024-04-27 14:01:57 +02:00 fix: small typo in 2024-03-16 06:10:47 -03:00
clippy.toml Bump MSRV to Rust version 1.56.1 2023-11-23 06:20:02 +11:00
justfile Move nightly_version file to crate root 2024-04-04 15:42:12 +11:00
nightly-version Automated update to Github CI to rustc nightly-2024-04-25 2024-04-26 01:05:58 +00:00
rustfmt.toml Update to edition 2021 2023-11-23 06:20:03 +11:00

Unsafe Fast Fork


This is an experimental fork with extreme changes that intentionally break important security mechanisms and functionality in favor of speed for certain security research workloads.

The forked library version is completely unsuitable for any type of production use and receives no support or maintenance of any kind. It is published primarily as a reference for other researchers. You have been warned.

The original documentation content and other references are kept as-is to limit the repository differences to upstream. However, be aware that none of the contact information, usage guidance or security guarantees still applies since this is a deliberately broken variant of the project.

Rust Bitcoin

Rust Bitcoin logo by Hunter Trujillo, see license and source files under /logo

Library with support for de/serialization, parsing and executing on data-structures and network messages related to Bitcoin.

Crate Info CC0 1.0 Universal Licensed CI Status API Docs Rustc Version 1.56.1+ Chat on IRC


Supports (or should support)

  • De/serialization of Bitcoin protocol network messages
  • De/serialization of blocks and transactions
  • Script de/serialization
  • Private keys and address creation, de/serialization and validation (including full BIP32 support)
  • PSBT v0 de/serialization and all but the Input Finalizer role. Use rust-miniscript to finalize.

For JSONRPC interaction with Bitcoin Core, it is recommended to use rust-bitcoincore-rpc.

It is recommended to always use cargo-crev to verify the trustworthiness of each of your dependencies, including this one.

Known limitations


This library must not be used for consensus code (i.e. fully validating blockchain data). It technically supports doing this, but doing so is very ill-advised because there are many deviations, known and unknown, between this library and the Bitcoin Core reference implementation. In a consensus based cryptocurrency such as Bitcoin it is critical that all parties are using the same rules to validate data, and this library is simply unable to implement the same rules as Core.

Given the complexity of both C++ and Rust, it is unlikely that this will ever be fixed, and there are no plans to do so. Of course, patches to fix specific consensus incompatibilities are welcome.

Support for 16-bit pointer sizes

16-bit pointer sizes are not supported and we can't promise they will be. If you care about them please let us know, so we can know how large the interest is and possibly decide to support them.


Currently can be found on Patches to add usage examples and to expand on existing docs would be extremely appreciated.


Contributions are generally welcome. If you intend to make larger changes please discuss them in an issue before PRing them to avoid duplicate work and architectural mismatches. If you have any questions or ideas you want to discuss please join us in #bitcoin-rust on

For more information please see ./

Minimum Supported Rust Version (MSRV)

This library should always compile with any combination of features on Rust 1.56.1.

To build with the MSRV you will likely need to pin a bunch of dependencies, see ./contrib/ for the current list.

External dependencies

We integrate with a few external libraries, most notably serde. These are available via feature flags. To ensure compatibility and MSRV stability we provide two lock files as a means of inspecting compatible versions: Cargo-minimal.lock containing minimal versions of dependencies and Cargo-recent.lock containing recent versions of dependencies tested in our CI.

We do not provide any guarantees about the content of these lock files outside of "our CI didn't fail with these versions". Specifically, we do not guarantee that the committed hashes are free from malware. It is your responsibility to review them.

Installing Rust

Rust can be installed using your package manager of choice or The former way is considered more secure since it typically doesn't involve trust in the CA system. But you should be aware that the version of Rust shipped by your distribution might be out of date. Generally this isn't a problem for rust-bitcoin since we support much older versions than the current stable one (see MSRV section).


The cargo feature std is enabled by default. At least one of the features std or no-std or both must be enabled.

Enabling the no-std feature does not disable std. To disable the std feature you must disable default features. The no-std feature only enables additional features required for this crate to be usable without std. Both can be enabled without conflict.

The library can be built and tested using cargo:

git clone
cd rust-bitcoin
cargo build

You can run tests with:

cargo test

Please refer to the cargo documentation for more detailed instructions.


We support just for running dev workflow commands. Run just from your shell to see list available sub-commands.

Building the docs

We build docs with the nightly toolchain, you may wish to use the following shell alias to check your documentation changes build correctly.

alias build-docs='RUSTDOCFLAGS="--cfg docsrs" cargo +nightly rustdoc --features="$FEATURES" -- -D rustdoc::broken-intra-doc-links'


Unit and integration tests are available for those interested, along with benchmarks. For project developers, especially new contributors looking for something to work on, we do:

There are always more tests to write and more bugs to find, contributions to our testing efforts extremely welcomed. Please consider testing code a first class citizen, we definitely do take PRs improving and cleaning up test code.

Unit/Integration tests

Run as for any other Rust project cargo test --all-features.


We use a custom Rust compiler configuration conditional to guard the bench mark code. To run the bench marks use: RUSTFLAGS='--cfg=bench' cargo +nightly bench.

Mutation tests

We have started doing mutation testing with mutagen. To run these tests first install the latest dev version with cargo +nightly install --git then run with RUSTFLAGS='--cfg=mutate' cargo +nightly mutagen.

Code verification

We have started using kani, install with cargo install --locked kani-verifier (no need to run cargo kani setup). Run the tests with cargo kani.

Pull Requests

Every PR needs at least two reviews to get merged. During the review phase maintainers and contributors are likely to leave comments and request changes. Please try to address them, otherwise your PR might get closed without merging after a longer time of inactivity. If your PR isn't ready for review yet please mark it by prefixing the title with WIP: .

CI Pipeline

The CI pipeline requires approval before being run on each MR.

In order to speed up the review process the CI pipeline can be run locally using act. The fuzz and Cross jobs will be skipped when using act due to caching being unsupported at this time. We do not actively support act but will merge PRs fixing act issues.


To assist devs in catching errors before running CI we provide some githooks. If you do not already have locally configured githooks you can use the ones in this repository by running, in the root directory of the repository:

git config --local core.hooksPath githooks/

Alternatively add symlinks in your .git/hooks directory to any of the githooks we provide.

Policy on Altcoins/Altchains

Since the altcoin landscape includes projects which frequently appear and disappear, and are poorly designed anyway we do not support any altcoins. Supporting Bitcoin properly is already difficult enough and we do not want to increase the maintenance burden and decrease API stability by adding support for other coins.

Our code is public domain so by all means fork it and go wild :)

Release Notes

Release notes are done per crate, see:


The code in this project is licensed under the Creative Commons CC0 1.0 Universal license. We use the SPDX license list and SPDX IDs.