Lnd

Mostly a copy of electrsd & bitcoind fit for LND.

Utility to run a regtest LND process connected to a given bitcoind instance, useful in integration testing environment.

// Create a bitcoind instance
let mut bitcoin_conf = bitcoind::Conf::default();
bitcoin_conf.enable_zmq = true;

let bitcoind = bitcoind::BitcoinD::with_conf("/usr/local/bin/bitcoind", &bitcoin_conf).unwrap();

// Pass the binary path, bitcoind, and ZMQ ports
let mut lnd = lnd::Lnd::new("<path to lnd>", &bitcoind);

let node = lnd.client.lightning().get_info(GetInfoRequest {}).await; 

assert!(node.is_ok());

Automatic binaries download

In your project Cargo.toml, activate the following features

lnd = { version = "*", features = ["download"] }

To use it:

let bitcoind_exe = bitcoind::downloaded_exe_path().expect("bitcoind version feature must be enabled");
let bitcoind = bitcoind::BitcoinD::new(bitcoind_exe).unwrap();
let lnd_exe = lnd::downloaded_exe_path().expect("lnd version feature must be enabled");
let lnd = lnd::Lnd::new(lnd_exe, bitcoind).unwrap();

When the LND_DOWNLOAD_ENDPOINT/BITCOIND_DOWNLOAD_ENDPOINT environment variables are set, lnd/bitcoind will try to download the binaries from the given endpoints.

When you don't use the auto-download feature you have the following options:

• have lnd executable in the PATH
• provide the lnd executable via the LND_EXEC env var

if let Ok(exe_path) = lnd::exe_path() {
  let lnd = lnd::Lnd::new(exe_path, &bitcoind).unwrap();
}

Features

• lnd use a temporary directory as db dir
• A free port is asked to the OS (a very low probability race condition is still possible)
• The process is killed when the struct goes out of scope no matter how the test finishes

Thanks to these features every #[test] could easily run isolated with its own environment