-fn main() {
- let args = match cli::parse_startup_args() {
- Ok(user_args) => user_args,
- Err(()) => return
- };
-
- // Initialize the LDK data directory if necessary.
- let ldk_data_dir = format!("{}/.ldk", args.ldk_storage_dir_path);
- fs::create_dir_all(ldk_data_dir.clone()).unwrap();
-
- // Initialize our bitcoind client.
- let bitcoind_client = match BitcoindClient::new(args.bitcoind_rpc_host.clone(),
- args.bitcoind_rpc_port, args.bitcoind_rpc_username.clone(),
- args.bitcoind_rpc_password.clone()) {
- Ok(client) => Arc::new(client),
- Err(e) => {
- println!("Failed to connect to bitcoind client: {}", e);
- return
- }
- };
- let mut bitcoind_rpc_client = bitcoind_client.get_new_rpc_client().unwrap();
-
- // ## Setup
- // Step 1: Initialize the FeeEstimator
-
- // BitcoindClient implements the FeeEstimator trait, so it'll act as our fee estimator.
- let fee_estimator = bitcoind_client.clone();
-
- // Step 2: Initialize the Logger
- let logger = Arc::new(FilesystemLogger::new(ldk_data_dir.clone()));
-
- // Step 3: Initialize the BroadcasterInterface
-
- // BitcoindClient implements the BroadcasterInterface trait, so it'll act as our transaction
- // broadcaster.
- let broadcaster = bitcoind_client.clone();
-
- // Step 4: Initialize Persist
- let persister = Arc::new(FilesystemPersister::new(ldk_data_dir.clone()));
-
- // Step 5: Initialize the ChainMonitor
- let chain_monitor: Arc<ArcChainMonitor> = Arc::new(ChainMonitor::new(None, broadcaster.clone(),
- logger.clone(), fee_estimator.clone(),
- persister.clone()));
-
- // Step 6: Initialize the KeysManager
-
- // The key seed that we use to derive the node privkey (that corresponds to the node pubkey) and
- // other secret key material.
- let keys_seed_path = format!("{}/keys_seed", ldk_data_dir.clone());
- let keys_seed = if let Ok(seed) = fs::read(keys_seed_path.clone()) {
- assert_eq!(seed.len(), 32);
- let mut key = [0; 32];
- key.copy_from_slice(&seed);
- key
- } else {
- let mut key = [0; 32];
- thread_rng().fill_bytes(&mut key);
- let mut f = File::create(keys_seed_path).unwrap();
- f.write_all(&key).expect("Failed to write node keys seed to disk");
- f.sync_all().expect("Failed to sync node keys seed to disk");
- key
- };
- let cur = SystemTime::now().duration_since(SystemTime::UNIX_EPOCH).unwrap();
- let keys_manager = Arc::new(KeysManager::new(&keys_seed, cur.as_secs(), cur.subsec_nanos()));
-
- // Step 7: Read ChannelMonitor state from disk
- let monitors_path = format!("{}/monitors", ldk_data_dir.clone());
- let mut outpoint_to_channelmonitor = disk::read_channelmonitors(monitors_path.to_string(),
- keys_manager.clone()).unwrap();
-
- // Step 9: Initialize the ChannelManager
- let user_config = UserConfig::default();
- let runtime = Runtime::new().unwrap();
- let mut restarting_node = true;
- let (channel_manager_blockhash, mut channel_manager) = {
- if let Ok(mut f) = fs::File::open(format!("{}/manager", ldk_data_dir.clone())) {
- let mut channel_monitor_mut_references = Vec::new();
- for (_, channel_monitor) in outpoint_to_channelmonitor.iter_mut() {
- channel_monitor_mut_references.push(&mut channel_monitor.1);
- }
- let read_args = ChannelManagerReadArgs::new(keys_manager.clone(), fee_estimator.clone(),
- chain_monitor.clone(), broadcaster.clone(),
- logger.clone(), user_config,
- channel_monitor_mut_references);
- <(BlockHash, ChannelManager)>::read(&mut f, read_args).unwrap()
- } else { // We're starting a fresh node.
- restarting_node = false;
- let getinfo_resp = bitcoind_client.get_blockchain_info();
- let chain_params = ChainParameters {
- network: args.network,
- latest_hash: getinfo_resp.latest_blockhash,
- latest_height: getinfo_resp.latest_height,
- };
- let fresh_channel_manager = channelmanager::ChannelManager::new(fee_estimator.clone(),
- chain_monitor.clone(),
- broadcaster.clone(),
- logger.clone(),
- keys_manager.clone(),
- user_config, chain_params);
- (getinfo_resp.latest_blockhash, fresh_channel_manager)
- }
- };
-
- // Step 10: Sync ChannelMonitors and ChannelManager to chain tip
- let mut chain_listener_channel_monitors = Vec::new();
- let mut cache = UnboundedCache::new();
- let mut chain_tip: Option<poll::ValidatedBlockHeader> = None;
- if restarting_node {
- let mut chain_listeners = vec![
- (channel_manager_blockhash, &mut channel_manager as &mut dyn chain::Listen)];
-
- for (outpoint, blockhash_and_monitor) in outpoint_to_channelmonitor.drain() {
- let blockhash = blockhash_and_monitor.0;
- let channel_monitor = blockhash_and_monitor.1;
- chain_listener_channel_monitors.push((blockhash, (channel_monitor,
- broadcaster.clone(), fee_estimator.clone(),
- logger.clone()), outpoint));
- }
-
- for monitor_listener_info in chain_listener_channel_monitors.iter_mut() {
- chain_listeners.push((monitor_listener_info.0,
- &mut monitor_listener_info.1 as &mut dyn chain::Listen));
- }
- chain_tip = Some(runtime.block_on(init::synchronize_listeners(&mut bitcoind_rpc_client, args.network,
- &mut cache, chain_listeners)).unwrap());
- }
-
- // Step 11: Give ChannelMonitors to ChainMonitor
- for item in chain_listener_channel_monitors.drain(..) {
- let channel_monitor = item.1.0;
- let funding_outpoint = item.2;
- chain_monitor.watch_channel(funding_outpoint, channel_monitor).unwrap();
- }
-
- // Step 13: Optional: Initialize the NetGraphMsgHandler
- // XXX persist routing data
- let genesis = genesis_block(args.network).header.block_hash();
- let router = Arc::new(NetGraphMsgHandler::new(genesis, None::<Arc<dyn chain::Access>>, logger.clone()));
-
- // Step 14: Initialize the PeerManager
- let channel_manager: Arc<ChannelManager> = Arc::new(channel_manager);
- let mut ephemeral_bytes = [0; 32];
- rand::thread_rng().fill_bytes(&mut ephemeral_bytes);
- let lightning_msg_handler = MessageHandler { chan_handler: channel_manager.clone(),
- route_handler: router.clone() };
- let peer_manager: Arc<PeerManager> = Arc::new(PeerManager::new(lightning_msg_handler,
- keys_manager.get_node_secret(),
- &ephemeral_bytes, logger.clone()));
-
- // ## Running LDK
- // Step 16: Initialize Peer Connection Handling
-
- // We poll for events in handle_ldk_events(..) rather than waiting for them over the
- // mpsc::channel, so we can leave the event receiver as unused.
- let (event_ntfn_sender, mut _event_ntfn_receiver) = mpsc::channel(2);
- let peer_manager_connection_handler = peer_manager.clone();
- let event_notifier = event_ntfn_sender.clone();
- let listening_port = args.ldk_peer_listening_port;
- runtime.spawn(async move {
- let listener = std::net::TcpListener::bind(format!("0.0.0.0:{}", listening_port)).unwrap();
- loop {
- let tcp_stream = listener.accept().unwrap().0;
- lightning_net_tokio::setup_inbound(peer_manager_connection_handler.clone(),
- event_notifier.clone(), tcp_stream).await;
- }
- });
-
- // Step 17: Connect and Disconnect Blocks
- if chain_tip.is_none() {
- chain_tip = Some(runtime.block_on(init::validate_best_block_header(&mut bitcoind_rpc_client)).unwrap());
- }
- let channel_manager_listener = channel_manager.clone();
- let chain_monitor_listener = chain_monitor.clone();
- let network = args.network;
- runtime.spawn(async move {
- let chain_poller = poll::ChainPoller::new(&mut bitcoind_rpc_client, network);
- let chain_listener = (chain_monitor_listener, channel_manager_listener);
- let mut spv_client = SpvClient::new(chain_tip.unwrap(), chain_poller, &mut cache,
- &chain_listener);
- loop {
- spv_client.poll_best_tip().await.unwrap();
- thread::sleep(Duration::new(1, 0));
- }
- });
-
- // Step 17 & 18: Initialize ChannelManager persistence & Once Per Minute: ChannelManager's
- // timer_chan_freshness_every_min() and PeerManager's timer_tick_occurred
- let runtime_handle = runtime.handle();
- let data_dir = ldk_data_dir.clone();
- let persist_channel_manager_callback = move |node: &ChannelManager| {
- FilesystemPersister::persist_manager(data_dir.clone(), &*node)
- };
- BackgroundProcessor::start(persist_channel_manager_callback, channel_manager.clone(),
- logger.clone());
-
- let peer_manager_processor = peer_manager.clone();
- runtime_handle.spawn(async move {
- loop {
- peer_manager_processor.timer_tick_occurred();
- thread::sleep(Duration::new(60, 0));
- }
- });
-
- // Step 15: Initialize LDK Event Handling
- let peer_manager_event_listener = peer_manager.clone();
- let channel_manager_event_listener = channel_manager.clone();
- let chain_monitor_event_listener = chain_monitor.clone();
- let keys_manager_listener = keys_manager.clone();
- let payment_info: PaymentInfoStorage = Arc::new(Mutex::new(HashMap::new()));
- let payment_info_for_events = payment_info.clone();
- let handle = runtime_handle.clone();
- let network = args.network;
- thread::spawn(move || {
- handle_ldk_events(peer_manager_event_listener, channel_manager_event_listener,
- chain_monitor_event_listener, bitcoind_client.clone(),
- keys_manager_listener, payment_info_for_events, network);
- });
-
- // Reconnect to channel peers if possible.
- let peer_data_path = format!("{}/channel_peer_data", ldk_data_dir.clone());
- match disk::read_channel_peer_data(Path::new(&peer_data_path)) {
- Ok(mut info) => {
- for (pubkey, peer_addr) in info.drain() {
- let _ = cli::connect_peer_if_necessary(pubkey, peer_addr, peer_manager.clone(),
- event_ntfn_sender.clone(), handle.clone());
- }
- },
- Err(e) => println!("ERROR: errored reading channel peer info from disk: {:?}", e),
- }
-
- // Start the CLI.
- cli::poll_for_user_input(peer_manager.clone(), channel_manager.clone(), router.clone(),
- payment_info, keys_manager.get_node_secret(), event_ntfn_sender,
- ldk_data_dir.clone(), logger.clone(), handle, args.network);