#lightning #core #grpc #node #signer

bin+lib lightning-signer-core

A library for implementing a Lightning signer, which externalizes and secures cryptographic operations

2 releases

0.1.0 May 14, 2021



Rust Lightning Signer

Please see the Rust Lightning Signer Project Overview for more information.

Starting the gRPC server

The gRPC server is a reference implementation of a signer which listens for requests from the node and from the admin CLI over gRPC.

It can be started via: cargo run --bin server

The server will persist it's state to .lightning-signer in the current directory.

Using the admin CLI

Assuming the server is running (see above), the admin CLI can be invoked as follows: cargo run --bin client -- [ARGUMENTS]. For example, to get help, run cargo run --bin client -- help.

Here is an example session:

node_id=$(cargo run --bin client -- node new)
channel_id=$(cargo run --bin client -- channel new -n $node_id)
cargo run --bin client -- channel list -n $node_id

Development Information

Formatting Code

For some reason, the ignore configuration for rustfmt is only available on the nightly channel, even though it's documented as stable.

rustup install nightly

cargo +nightly fmt

Building Rust Lightning Signer

cargo build

or if you want to disable grpc (grpc is the only default feature):

cargo build --no-default-features

Running Unit Tests

cargo test

Running the Server

cargo run --bin server

Using kcov for Code Coverage


sudo dnf install -y elfutils-devel
sudo dnf install -y curl-devel
sudo dnf install -y binutils-devel

Build v38 of kcov from git@github.com:SimonKagstrom/kcov.git .

More dependencies:

cargo install cargo-kcov
cargo install cargo-coverage-annotations

Run coverage:


View Coverage Report:


Check coverage annotations in source files:

cargo coverage-annotations


~473K SLoC