1 unstable release
new 0.0.1 | Nov 4, 2024 |
---|
#582 in #bitcoin
11MB
170K
SLoC
rust-bitcoinkernel
⚠️🚧 This library is still under contruction. ⚠️🚧
rust-bitcoinkernel
is a wrapper around
libbitcoinkernel, a C++
library exposing Bitcoin Core's validation engine. It supports both validation
of blocks and transaction outputs as well as reading block data.
Building
The library statically compiles the Bitcoin Core libbitcoinkernel library as part of its build system. Currently it targets the kernelApi branch on the following fork: https://github.com/TheCharlatan/bitcoin/tree/kernelApi.
Bitcoin Core is vendored as a git subtree
in this project. The subtree can
be updated, or made to point at a different commit or branch in Bitcoin Core's
history with:
git subtree pull --prefix libbitcoinkernel-sys/bitcoin https://github.com/TheCharlatan/bitcoin kernelApiNode --squash
To build this library, the usual Bitcoin Core build requirements, such as
cmake
and a working C and C++ compiler are required. An installation of boost
is required as well. Consult the Bitcoin Core documentation for the required
dependencies. Once setup, run:
cargo b
Examples
Examples for the usage of the library can be found in the examples/
directory
and the tests
. For now, the example binary implements a bare-bones silent
payments scanner.
Fuzzing
Fuzzing is done with cargo fuzz.
There are currently three supported fuzzing targets: fuzz_target_block
,
fuzz_target_chainman
and fuzz_target_verify
. The chainman
target touches
the filesystem in /tmp
. If /tmp
is not already a tmpfs, the user should
create a tmpfs in /tmp/rust_kernel_fuzz
.
To get fuzzing run (in this case the verify
target):
cargo fuzz run fuzz_target_verify
Sanitizers can be turned on with e.g.
RUSTFLAGS="-Zsanitizer=address" cargo fuzz run fuzz_target_block
To get the sanitizer flags working in the libbitcoinkernel Bitcoin Core
library, the easiest way for now is to edit the libbitcoinkernel-sys/build.rs
flags.
Coverage
Once fuzzed, a coverage report can be generated with (picking the verify
target as an example):
RUSTFLAGS="-C instrument-coverage" cargo fuzz coverage fuzz_target_verify
llvm-cov show \
-format=html \
-instr-profile=fuzz/coverage/fuzz_target_verify/coverage.profdata \
target/x86_64-unknown-linux-gnu/coverage/x86_64-unknown-linux-gnu/release/fuzz_target_verify \
-show-line-counts-or-regions \
-Xdemangler=rustfilt \
-output-dir=coverage_report \
-ignore-filename-regex="/rustc"
You may have to install the following tooling:
rustup component add llvm-tools-preview
cargo install rustfilt