use bitcoin::blockdata::constants::genesis_block;
use bitcoin::blockdata::transaction::Transaction;
use bitcoin::consensus::encode;
-use bitcoin::hashes::sha256::Hash as Sha256;
-use bitcoin::hashes::Hash;
use bitcoin::network::constants::Network;
use bitcoin::secp256k1::Secp256k1;
use bitcoin::BlockHash;
use lightning::chain::chaininterface::{BroadcasterInterface, ConfirmationTarget, FeeEstimator};
use lightning::chain::chainmonitor;
use lightning::chain::keysinterface::{InMemorySigner, KeysInterface, KeysManager};
-use lightning::chain::Filter;
-use lightning::chain::Watch;
+use lightning::chain::{BestBlock, Filter, Watch};
use lightning::ln::channelmanager;
use lightning::ln::channelmanager::{
- BestBlock, ChainParameters, ChannelManagerReadArgs, SimpleArcChannelManager,
+ ChainParameters, ChannelManagerReadArgs, SimpleArcChannelManager,
};
-use lightning::ln::peer_handler::{MessageHandler, SimpleArcPeerManager};
+use lightning::ln::peer_handler::{IgnoringMessageHandler, MessageHandler, SimpleArcPeerManager};
use lightning::ln::{PaymentHash, PaymentPreimage, PaymentSecret};
-use lightning::routing::network_graph::NetGraphMsgHandler;
+use lightning::routing::network_graph::{NetGraphMsgHandler, NetworkGraph};
+use lightning::routing::scorer::Scorer;
use lightning::util::config::UserConfig;
-use lightning::util::events::Event;
+use lightning::util::events::{Event, PaymentPurpose};
use lightning::util::ser::ReadableArgs;
use lightning_background_processor::BackgroundProcessor;
use lightning_block_sync::init;
use lightning_block_sync::poll;
use lightning_block_sync::SpvClient;
use lightning_block_sync::UnboundedCache;
+use lightning_invoice::payment;
+use lightning_invoice::utils::DefaultRouter;
use lightning_net_tokio::SocketDescriptor;
use lightning_persister::FilesystemPersister;
use rand::{thread_rng, Rng};
pub(crate) type ChannelManager =
SimpleArcChannelManager<ChainMonitor, BitcoindClient, BitcoindClient, FilesystemLogger>;
+pub(crate) type InvoicePayer<E> = payment::InvoicePayer<
+ Arc<ChannelManager>,
+ Router,
+ Arc<Mutex<Scorer>>,
+ Arc<FilesystemLogger>,
+ E,
+>;
+
+type Router = DefaultRouter<Arc<NetworkGraph>, Arc<FilesystemLogger>>;
+
async fn handle_ldk_events(
channel_manager: Arc<ChannelManager>, bitcoind_client: Arc<BitcoindClient>,
keys_manager: Arc<KeysManager>, inbound_payments: PaymentInfoStorage,
- outbound_payments: PaymentInfoStorage, network: Network, event: Event,
+ outbound_payments: PaymentInfoStorage, network: Network, event: &Event,
) {
match event {
Event::FundingGenerationReady {
.expect("Lightning funding tx should always be to a SegWit output")
.to_address();
let mut outputs = vec![HashMap::with_capacity(1)];
- outputs[0].insert(addr, channel_value_satoshis as f64 / 100_000_000.0);
+ outputs[0].insert(addr, *channel_value_satoshis as f64 / 100_000_000.0);
let raw_tx = bitcoind_client.create_raw_transaction(outputs).await;
// Have your wallet put the inputs into the transaction such that the output is
// satisfied.
let funded_tx = bitcoind_client.fund_raw_transaction(raw_tx).await;
- let change_output_position = funded_tx.changepos;
- assert!(change_output_position == 0 || change_output_position == 1);
// Sign the final funding transaction and broadcast it.
let signed_tx = bitcoind_client.sign_raw_transaction_with_wallet(funded_tx.hex).await;
let final_tx: Transaction =
encode::deserialize(&hex_utils::to_vec(&signed_tx.hex).unwrap()).unwrap();
// Give the funding transaction back to LDK for opening the channel.
- channel_manager.funding_transaction_generated(&temporary_channel_id, final_tx).unwrap();
+ if channel_manager
+ .funding_transaction_generated(&temporary_channel_id, final_tx)
+ .is_err()
+ {
+ println!(
+ "\nERROR: Channel went away before we could fund it. The peer disconnected or refused the channel.");
+ print!("> ");
+ io::stdout().flush().unwrap();
+ }
}
- Event::PaymentReceived { payment_hash, payment_preimage, payment_secret, amt, .. } => {
+ Event::PaymentReceived { payment_hash, purpose, amt, .. } => {
let mut payments = inbound_payments.lock().unwrap();
+ let (payment_preimage, payment_secret) = match purpose {
+ PaymentPurpose::InvoicePayment { payment_preimage, payment_secret, .. } => {
+ (*payment_preimage, Some(*payment_secret))
+ }
+ PaymentPurpose::SpontaneousPayment(preimage) => (Some(*preimage), None),
+ };
let status = match channel_manager.claim_funds(payment_preimage.unwrap()) {
true => {
println!(
}
_ => HTLCStatus::Failed,
};
- match payments.entry(payment_hash) {
+ match payments.entry(*payment_hash) {
Entry::Occupied(mut e) => {
let payment = e.get_mut();
payment.status = status;
- payment.preimage = Some(payment_preimage.unwrap());
- payment.secret = Some(payment_secret);
+ payment.preimage = payment_preimage;
+ payment.secret = payment_secret;
}
Entry::Vacant(e) => {
e.insert(PaymentInfo {
- preimage: Some(payment_preimage.unwrap()),
- secret: Some(payment_secret),
+ preimage: payment_preimage,
+ secret: payment_secret,
status,
- amt_msat: MillisatAmount(Some(amt)),
+ amt_msat: MillisatAmount(Some(*amt)),
});
}
}
}
- Event::PaymentSent { payment_preimage } => {
- let hashed = PaymentHash(Sha256::hash(&payment_preimage.0).into_inner());
+ Event::PaymentSent { payment_preimage, payment_hash, .. } => {
let mut payments = outbound_payments.lock().unwrap();
- for (payment_hash, payment) in payments.iter_mut() {
- if *payment_hash == hashed {
- payment.preimage = Some(payment_preimage);
+ for (hash, payment) in payments.iter_mut() {
+ if *hash == *payment_hash {
+ payment.preimage = Some(*payment_preimage);
payment.status = HTLCStatus::Succeeded;
println!(
"\nEVENT: successfully sent payment of {} millisatoshis from \
}
}
}
- Event::PaymentFailed { payment_hash, rejected_by_dest } => {
+ Event::PaymentPathFailed {
+ payment_hash,
+ rejected_by_dest,
+ all_paths_failed,
+ short_channel_id,
+ ..
+ } => {
print!(
- "\nEVENT: Failed to send payment to payment hash {:?}: ",
+ "\nEVENT: Failed to send payment{} to payment hash {:?}",
+ if *all_paths_failed { "" } else { " along MPP path" },
hex_utils::hex_str(&payment_hash.0)
);
- if rejected_by_dest {
- println!("re-attempting the payment will not succeed");
+ if let Some(scid) = short_channel_id {
+ print!(" because of failure at channel {}", scid);
+ }
+ if *rejected_by_dest {
+ println!(": re-attempting the payment will not succeed");
} else {
- println!("payment may be retried");
+ println!(": exhausted payment retry attempts");
}
print!("> ");
io::stdout().flush().unwrap();
payment.status = HTLCStatus::Failed;
}
}
+ Event::PaymentForwarded { fee_earned_msat, claim_from_onchain_tx } => {
+ let from_onchain_str = if *claim_from_onchain_tx {
+ "from onchain downstream claim"
+ } else {
+ "from HTLC fulfill message"
+ };
+ if let Some(fee_earned) = fee_earned_msat {
+ println!(
+ "\nEVENT: Forwarded payment, earning {} msat {}",
+ fee_earned, from_onchain_str
+ );
+ } else {
+ println!("\nEVENT: Forwarded payment, claiming onchain {}", from_onchain_str);
+ }
+ print!("> ");
+ io::stdout().flush().unwrap();
+ }
Event::PendingHTLCsForwardable { time_forwardable } => {
let forwarding_channel_manager = channel_manager.clone();
+ let min = time_forwardable.as_millis() as u64;
tokio::spawn(async move {
- let min = time_forwardable.as_millis() as u64;
let millis_to_sleep = thread_rng().gen_range(min, min * 5) as u64;
tokio::time::sleep(Duration::from_millis(millis_to_sleep)).await;
forwarding_channel_manager.process_pending_htlc_forwards();
.unwrap();
bitcoind_client.broadcast_transaction(&spending_tx);
}
+ Event::ChannelClosed { channel_id, reason, user_channel_id: _ } => {
+ println!(
+ "\nEVENT: Channel {} closed due to: {:?}",
+ hex_utils::hex_str(channel_id),
+ reason
+ );
+ print!("> ");
+ io::stdout().flush().unwrap();
+ }
+ Event::DiscardFunding { .. } => {
+ // A "real" node should probably "lock" the UTXOs spent in funding transactions until
+ // the funding transaction either confirms, or this event is generated.
+ }
}
}
args.bitcoind_rpc_port,
args.bitcoind_rpc_username.clone(),
args.bitcoind_rpc_password.clone(),
+ tokio::runtime::Handle::current(),
)
.await
{
let mut channelmonitors = persister.read_channelmonitors(keys_manager.clone()).unwrap();
// Step 8: Initialize the ChannelManager
- let user_config = UserConfig::default();
+ let mut user_config = UserConfig::default();
+ user_config.peer_channel_config_limits.force_announced_channel_preference = false;
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())) {
}
// Step 11: Optional: Initialize the NetGraphMsgHandler
- // XXX persist routing data
let genesis = genesis_block(args.network).header.block_hash();
- let router = Arc::new(NetGraphMsgHandler::new(
- genesis,
+ let network_graph_path = format!("{}/network_graph", ldk_data_dir.clone());
+ let network_graph = Arc::new(disk::read_network(Path::new(&network_graph_path), genesis));
+ let network_gossip = Arc::new(NetGraphMsgHandler::new(
+ Arc::clone(&network_graph),
None::<Arc<dyn chain::Access + Send + Sync>>,
logger.clone(),
));
+ let network_graph_persist = Arc::clone(&network_graph);
+ tokio::spawn(async move {
+ let mut interval = tokio::time::interval(Duration::from_secs(600));
+ loop {
+ interval.tick().await;
+ if disk::persist_network(Path::new(&network_graph_path), &network_graph_persist)
+ .is_err()
+ {
+ // Persistence errors here are non-fatal as we can just fetch the routing graph
+ // again later, but they may indicate a disk error which could be fatal elsewhere.
+ eprintln!(
+ "Warning: Failed to persist network graph, check your disk and permissions"
+ );
+ }
+ }
+ });
// Step 12: 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 lightning_msg_handler = MessageHandler {
+ chan_handler: channel_manager.clone(),
+ route_handler: network_gossip.clone(),
+ };
let peer_manager: Arc<PeerManager> = Arc::new(PeerManager::new(
lightning_msg_handler,
keys_manager.get_node_secret(),
&ephemeral_bytes,
logger.clone(),
+ Arc::new(IgnoringMessageHandler {}),
));
// ## Running LDK
}
});
- // Step 15: Event Handling
+ // Step 15: Handle LDK Events
let channel_manager_event_listener = channel_manager.clone();
let keys_manager_listener = keys_manager.clone();
// TODO: persist payment info to disk
let network = args.network;
let bitcoind_rpc = bitcoind_client.clone();
let handle = tokio::runtime::Handle::current();
- let event_handler = move |event| {
+ let event_handler = move |event: &Event| {
handle.block_on(handle_ldk_events(
channel_manager_event_listener.clone(),
bitcoind_rpc.clone(),
outbound_pmts_for_events.clone(),
network,
event,
- ))
+ ));
};
- // Step 16: ChannelManager Persisting
+
+ // Step 16: Initialize routing Scorer
+ let scorer_path = format!("{}/scorer", ldk_data_dir.clone());
+ let scorer = Arc::new(Mutex::new(disk::read_scorer(Path::new(&scorer_path))));
+ let scorer_persist = Arc::clone(&scorer);
+ tokio::spawn(async move {
+ let mut interval = tokio::time::interval(Duration::from_secs(600));
+ loop {
+ interval.tick().await;
+ if disk::persist_scorer(Path::new(&scorer_path), &scorer_persist.lock().unwrap())
+ .is_err()
+ {
+ // Persistence errors here are non-fatal as channels will be re-scored as payments
+ // fail, but they may indicate a disk error which could be fatal elsewhere.
+ eprintln!("Warning: Failed to persist scorer, check your disk and permissions");
+ }
+ }
+ });
+
+ // Step 17: Create InvoicePayer
+ let router = DefaultRouter::new(network_graph.clone(), logger.clone());
+ let invoice_payer = Arc::new(InvoicePayer::new(
+ channel_manager.clone(),
+ router,
+ scorer.clone(),
+ logger.clone(),
+ event_handler,
+ payment::RetryAttempts(5),
+ ));
+
+ // Step 18: Persist ChannelManager
let data_dir = ldk_data_dir.clone();
let persist_channel_manager_callback =
move |node: &ChannelManager| FilesystemPersister::persist_manager(data_dir.clone(), &*node);
- // Step 17: Background Processing
- BackgroundProcessor::start(
+
+ // Step 19: Background Processing
+ let background_processor = BackgroundProcessor::start(
persist_channel_manager_callback,
- event_handler,
+ invoice_payer.clone(),
chain_monitor.clone(),
channel_manager.clone(),
+ Some(network_gossip.clone()),
peer_manager.clone(),
logger.clone(),
);
- // Reconnect to channel peers if possible.
+ // Regularly reconnect to channel peers.
+ let connect_cm = Arc::clone(&channel_manager);
+ let connect_pm = Arc::clone(&peer_manager);
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() {
- for chan_info in channel_manager.list_channels() {
- if pubkey == chan_info.remote_network_id {
- let _ =
- cli::connect_peer_if_necessary(pubkey, peer_addr, peer_manager.clone())
+ tokio::spawn(async move {
+ let mut interval = tokio::time::interval(Duration::from_secs(1));
+ loop {
+ interval.tick().await;
+ match disk::read_channel_peer_data(Path::new(&peer_data_path)) {
+ Ok(info) => {
+ let peers = connect_pm.get_peer_node_ids();
+ for node_id in connect_cm
+ .list_channels()
+ .iter()
+ .map(|chan| chan.counterparty.node_id)
+ .filter(|id| !peers.contains(id))
+ {
+ for (pubkey, peer_addr) in info.iter() {
+ if *pubkey == node_id {
+ let _ = cli::do_connect_peer(
+ *pubkey,
+ peer_addr.clone(),
+ Arc::clone(&connect_pm),
+ )
.await;
+ }
+ }
}
}
+ Err(e) => println!("ERROR: errored reading channel peer info from disk: {:?}", e),
}
}
- Err(e) => println!("ERROR: errored reading channel peer info from disk: {:?}", e),
- }
+ });
// Regularly broadcast our node_announcement. This is only required (or possible) if we have
// some public channels, and is only useful if we have public listen address(es) to announce.
// to avoid churn in the global network graph.
let chan_manager = Arc::clone(&channel_manager);
let network = args.network;
- if args.ldk_announced_listen_addr.is_some() {
+ if !args.ldk_announced_listen_addr.is_empty() {
tokio::spawn(async move {
let mut interval = tokio::time::interval(Duration::from_secs(60));
loop {
chan_manager.broadcast_node_announcement(
[0; 3],
args.ldk_announced_node_name,
- vec![args.ldk_announced_listen_addr.as_ref().unwrap().clone()],
+ args.ldk_announced_listen_addr.clone(),
);
}
});
// Start the CLI.
cli::poll_for_user_input(
+ invoice_payer.clone(),
peer_manager.clone(),
channel_manager.clone(),
keys_manager.clone(),
- router.clone(),
+ network_graph.clone(),
+ scorer.clone(),
inbound_payments,
outbound_payments,
ldk_data_dir.clone(),
network,
)
.await;
+
+ // Stop the background processor.
+ background_processor.stop().unwrap();
}
#[tokio::main]
projects / ldk-sample / blobdiff