ldk-node 0.7.0

A ready-to-go node implementation built using LDK.
Documentation 
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// This file is Copyright its original authors, visible in version control history.
//
// This file is licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
// http://opensource.org/licenses/MIT>, at your option. You may not use this file except in
// accordance with one or both of these licenses.

#![cfg(cln_test)]

mod common;

use std::default::Default;
use std::str::FromStr;

use clightningrpc::lightningrpc::LightningRPC;
use clightningrpc::responses::NetworkAddress;
use electrsd::corepc_client::client_sync::Auth;
use electrsd::corepc_node::Client as BitcoindClient;
use electrum_client::Client as ElectrumClient;
use ldk_node::bitcoin::secp256k1::PublicKey;
use ldk_node::bitcoin::Amount;
use ldk_node::lightning::ln::msgs::SocketAddress;
use ldk_node::{Builder, Event};
use lightning_invoice::{Bolt11Invoice, Bolt11InvoiceDescription, Description};
use rand::distr::Alphanumeric;
use rand::{rng, Rng};

#[tokio::test(flavor = "multi_thread", worker_threads = 1)]
async fn test_cln() {
	// Setup bitcoind / electrs clients
	let bitcoind_client = BitcoindClient::new_with_auth(
		"http://127.0.0.1:18443",
		Auth::UserPass("user".to_string(), "pass".to_string()),
	)
	.unwrap();
	let electrs_client = ElectrumClient::new("tcp://127.0.0.1:50001").unwrap();

	// Give electrs a kick.
	common::generate_blocks_and_wait(&bitcoind_client, &electrs_client, 1).await;

	// Setup LDK Node
	let config = common::random_config(true);
	let mut builder = Builder::from_config(config.node_config);
	builder.set_chain_source_esplora("http://127.0.0.1:3002".to_string(), None);

	let node = builder.build().unwrap();
	node.start().unwrap();

	// Premine some funds and distribute
	let address = node.onchain_payment().new_address().unwrap();
	let premine_amount = Amount::from_sat(5_000_000);
	common::premine_and_distribute_funds(
		&bitcoind_client,
		&electrs_client,
		vec![address],
		premine_amount,
	)
	.await;

	// Setup CLN
	let sock = "/tmp/lightning-rpc";
	let cln_client = LightningRPC::new(&sock);
	let cln_info = {
		loop {
			let info = cln_client.getinfo().unwrap();
			// Wait for CLN to sync block height before channel open.
			// Prevents crash due to unset blockheight (see LDK Node issue #527).
			if info.blockheight > 0 {
				break info;
			}
			tokio::time::sleep(std::time::Duration::from_millis(250)).await;
		}
	};
	let cln_node_id = PublicKey::from_str(&cln_info.id).unwrap();
	let cln_address: SocketAddress = match cln_info.binding.first().unwrap() {
		NetworkAddress::Ipv4 { address, port } => {
			std::net::SocketAddrV4::new(*address, *port).into()
		},
		NetworkAddress::Ipv6 { address, port } => {
			std::net::SocketAddrV6::new(*address, *port, 0, 0).into()
		},
		_ => {
			panic!()
		},
	};

	node.sync_wallets().unwrap();

	// Open the channel
	let funding_amount_sat = 1_000_000;

	node.open_channel(cln_node_id, cln_address, funding_amount_sat, Some(500_000_000), None)
		.unwrap();

	let funding_txo = common::expect_channel_pending_event!(node, cln_node_id);
	common::wait_for_tx(&electrs_client, funding_txo.txid).await;
	common::generate_blocks_and_wait(&bitcoind_client, &electrs_client, 6).await;
	node.sync_wallets().unwrap();
	let user_channel_id = common::expect_channel_ready_event!(node, cln_node_id);

	// Send a payment to CLN
	let mut rng = rng();
	let rand_label: String = (0..7).map(|_| rng.sample(Alphanumeric) as char).collect();
	let cln_invoice =
		cln_client.invoice(Some(10_000_000), &rand_label, &rand_label, None, None, None).unwrap();
	let parsed_invoice = Bolt11Invoice::from_str(&cln_invoice.bolt11).unwrap();

	node.bolt11_payment().send(&parsed_invoice, None).unwrap();
	common::expect_event!(node, PaymentSuccessful);
	let cln_listed_invoices =
		cln_client.listinvoices(Some(&rand_label), None, None, None).unwrap().invoices;
	assert_eq!(cln_listed_invoices.len(), 1);
	assert_eq!(cln_listed_invoices.first().unwrap().status, "paid");

	// Send a payment to LDK
	let rand_label: String = (0..7).map(|_| rng.sample(Alphanumeric) as char).collect();
	let invoice_description =
		Bolt11InvoiceDescription::Direct(Description::new(rand_label).unwrap());
	let ldk_invoice =
		node.bolt11_payment().receive(10_000_000, &invoice_description, 3600).unwrap();
	cln_client.pay(&ldk_invoice.to_string(), Default::default()).unwrap();
	common::expect_event!(node, PaymentReceived);

	node.close_channel(&user_channel_id, cln_node_id).unwrap();
	common::expect_event!(node, ChannelClosed);
	node.stop().unwrap();
}