### Install Honggfuzz

Source: https://github.com/lightningdevkit/rust-lightning/blob/main/fuzz/README.md

Installs the honggfuzz fuzzing engine. Use --force to overwrite existing installations.

```shell
cargo update
cargo install --force honggfuzz
```

--------------------------------

### Install Honggfuzz with Specific Version

Source: https://github.com/lightningdevkit/rust-lightning/blob/main/fuzz/README.md

Pins and installs honggfuzz version 0.5.52. Useful for ensuring consistent behavior across environments.

```shell
cargo update -p honggfuzz --precise "0.5.52"
cargo install --force honggfuzz --version "0.5.52"
```

--------------------------------

### Install cargo-fuzz

Source: https://github.com/lightningdevkit/rust-lightning/blob/main/fuzz/README.md

Installs the cargo-fuzz tool, which is a wrapper for libFuzzer.

```shell
cargo update
cargo install --force cargo-fuzz
```

--------------------------------

### Run LDK Benchmarks

Source: https://github.com/lightningdevkit/rust-lightning/blob/main/bench/README.md

Execute the LDK benchmarks using cargo bench. Ensure RUSTFLAGS is set to include the ldk_bench configuration.

```bash
RUSTFLAGS=--cfg=ldk_bench cargo bench
```

--------------------------------

### Format Code with Rustfmt

Source: https://github.com/lightningdevkit/rust-lightning/blob/main/CONTRIBUTING.md

Run this command to format your code according to the project's standards before committing. Compliance is checked by CI.

```bash
cargo +1.75.0 fmt
```

--------------------------------

### Format Code in rust-lightning

Source: https://github.com/lightningdevkit/rust-lightning/blob/main/AGENTS.md

Apply code formatting to all files using cargo fmt. This step should be skipped if rust 1.75.0 is not installed.

```bash
cargo +1.75.0 fmt --all
```

--------------------------------

### Retrieve Last Rapid Gossip Sync Timestamp in Rust

Source: https://github.com/lightningdevkit/rust-lightning/blob/main/lightning-rapid-gossip-sync/README.md

Shows how to get the last timestamp used for a Rapid Gossip Sync operation directly from the NetworkGraph object. This avoids the need for additional caching mechanisms.

```rust
let last_timestamp = network_graph.get_last_rapid_gossip_sync_timestamp();
```

--------------------------------

### Run Fuzz Tests with Honggfuzz (Colored Output)

Source: https://github.com/lightningdevkit/rust-lightning/blob/main/fuzz/README.md

A variation of the honggfuzz execution command that enables colored output for better readability.

```shell
cargo --color always hfuzz run --manifest-path fuzz-fake-hashes/Cargo.toml $TARGET
```

--------------------------------

### Run Fuzz Tests with Honggfuzz

Source: https://github.com/lightningdevkit/rust-lightning/blob/main/fuzz/README.md

Executes fuzz tests using honggfuzz. Requires setting environment variables for CPU count, build arguments, and run arguments. The TARGET variable specifies which fuzz target to run.

```shell
cd fuzz
export CPU_COUNT=1 # replace as needed
export HFUZZ_BUILD_ARGS="--features honggfuzz_fuzz"
export HFUZZ_RUN_ARGS="-n $CPU_COUNT --exit_upon_crash"

export TARGET="msg_ping_target" # replace with the target to be fuzzed
export RUSTFLAGS="--cfg=fuzzing --cfg=secp256k1_fuzz --cfg=hashes_fuzz"
cargo hfuzz run --manifest-path fuzz-fake-hashes/Cargo.toml $TARGET
```

--------------------------------

### List Fuzzing Targets

Source: https://github.com/lightningdevkit/rust-lightning/blob/main/fuzz/README.md

Lists the available fuzzing target binaries within the specified directories.

```shell
ls ./fuzz-fake-hashes/src/bin/
ls ./fuzz-real-hashes/src/bin/
```

--------------------------------

### Fast Fuzz Builds for Development with libFuzzer

Source: https://github.com/lightningdevkit/rust-lightning/blob/main/fuzz/README.md

Enables faster build times during development for libFuzzer fuzz targets by using the `-D` flag, which builds in development mode with optimizations.

```shell
cd fuzz
RUSTFLAGS="--cfg=fuzzing --cfg=secp256k1_fuzz --cfg=hashes_fuzz" \
	cargo +nightly fuzz run --fuzz-dir fuzz-fake-hashes --features "libfuzzer_fuzz" -D msg_ping_target
```