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default-features = false, features = ["server", "http1"] } +http-body-util = { version = "0.1", default-features = false } +hyper-util = { version = "0.1", default-features = false, features = ["server-graceful"] } +tokio = { version = "1.38.0", default-features = false, features = ["time", "signal", "rt-multi-thread"] } +prost = { version = "0.12.3", default-features = false, features = ["derive", "std"] } diff --git a/server/src/main.rs b/server/src/main.rs index a30eb95..b440903 100644 --- a/server/src/main.rs +++ b/server/src/main.rs @@ -1,3 +1,157 @@ +mod service; + +use crate::service::NodeService; + +use ldk_node::bitcoin::Network; +use ldk_node::lightning::ln::msgs::SocketAddress; +use ldk_node::{Builder, Config, Event, LogLevel}; + +use tokio::net::TcpListener; +use tokio::signal::unix::SignalKind; + +use hyper::server::conn::http1; +use hyper_util::rt::TokioIo; + +use std::net::SocketAddr; +use std::str::FromStr; +use std::sync::Arc; + fn main() { - println!("Hello, world!"); + let args: Vec = std::env::args().collect(); + + if args.len() < 6 { + eprintln!( + "Usage: {} storage_path listening_addr rest_svc_addr network esplora_server_url", + args[0] + ); + std::process::exit(-1); + } + + let mut config = Config::default(); + config.storage_dir_path = args[1].clone(); + config.log_level = LogLevel::Trace; + + config.listening_addresses = match SocketAddress::from_str(&args[2]) { + Ok(addr) => Some(vec![addr]), + Err(_) => { + eprintln!("Failed to parse listening_addr: {}", args[2]); + std::process::exit(-1); + }, + }; + + let rest_svc_addr = match SocketAddr::from_str(&args[3]) { + Ok(addr) => addr, + Err(_) => { + eprintln!("Failed to parse rest_svc_addr: {}", args[3]); + std::process::exit(-1); + }, + }; + + config.network = match Network::from_str(&args[4]) { + Ok(network) => network, + Err(_) => { + eprintln!("Unsupported network: {}. Use 'bitcoin', 'testnet', 'regtest', 'signet', 'regtest'.", args[4]); + std::process::exit(-1); + }, + }; + + let mut builder = Builder::from_config(config); + builder.set_esplora_server(args[5].clone()); + + let runtime = match tokio::runtime::Builder::new_multi_thread().enable_all().build() { + Ok(runtime) => Arc::new(runtime), + Err(e) => { + eprintln!("Failed to setup tokio runtime: {}", e); + std::process::exit(-1); + }, + }; + + let node = match builder.build() { + Ok(node) => Arc::new(node), + Err(e) => { + eprintln!("Failed to build LDK Node: {}", e); + std::process::exit(-1); + }, + }; + + println!("Starting up..."); + match node.start_with_runtime(Arc::clone(&runtime)) { + Ok(()) => {}, + Err(e) => { + eprintln!("Failed to start up LDK Node: {}", e); + std::process::exit(-1); + }, + } + + println!( + "CONNECTION_STRING: {}@{}", + node.node_id(), + node.config().listening_addresses.as_ref().unwrap().first().unwrap() + ); + + runtime.block_on(async { + let mut sigterm_stream = match tokio::signal::unix::signal(SignalKind::terminate()) { + Ok(stream) => stream, + Err(e) => { + println!("Failed to register for SIGTERM stream: {}", e); + std::process::exit(-1); + }, + }; + let event_node = Arc::clone(&node); + let rest_svc_listener = + TcpListener::bind(rest_svc_addr).await.expect("Failed to bind listening port"); + loop { + tokio::select! { + event = event_node.next_event_async() => { + match event { + Event::ChannelPending { channel_id, counterparty_node_id, .. } => { + println!( + "CHANNEL_PENDING: {} from counterparty {}", + channel_id, counterparty_node_id + ); + }, + Event::ChannelReady { channel_id, counterparty_node_id, .. } => { + println!( + "CHANNEL_READY: {} from counterparty {:?}", + channel_id, counterparty_node_id + ); + }, + Event::PaymentReceived { payment_id, payment_hash, amount_msat } => { + println!( + "PAYMENT_RECEIVED: with id {:?}, hash {}, amount_msat {}", + payment_id, payment_hash, amount_msat + ); + }, + _ => {}, + } + event_node.event_handled(); + }, + res = rest_svc_listener.accept() => { + match res { + Ok((stream, _)) => { + let io_stream = TokioIo::new(stream); + let node_service = NodeService::new(Arc::clone(&node)); + runtime.spawn(async move { + if let Err(err) = http1::Builder::new().serve_connection(io_stream, node_service).await { + eprintln!("Failed to serve connection: {}", err); + } + }); + }, + Err(e) => eprintln!("Failed to accept connection: {}", e), + } + } + _ = tokio::signal::ctrl_c() => { + println!("Received CTRL-C, shutting down.."); + break; + } + _ = sigterm_stream.recv() => { + println!("Received SIGTERM, shutting down.."); + break; + } + } + } + }); + + node.stop().expect("Shutdown should always succeed."); + println!("Shutdown complete.."); } diff --git a/server/src/service.rs b/server/src/service.rs new file mode 100644 index 0000000..606dfd1 --- /dev/null +++ b/server/src/service.rs @@ -0,0 +1,74 @@ +use ldk_node::Node; + +use http_body_util::{BodyExt, Full}; +use hyper::body::{Bytes, Incoming}; +use hyper::service::Service; +use hyper::{Request, Response, StatusCode}; + +use prost::Message; + +use std::future::Future; +use std::pin::Pin; +use std::sync::Arc; + +#[derive(Clone)] +pub struct NodeService { + node: Arc, +} + +impl NodeService { + pub(crate) fn new(node: Arc) -> Self { + Self { node } + } +} + +impl Service> for NodeService { + type Response = Response>; + type Error = hyper::Error; + type Future = Pin> + Send>>; + + fn call(&self, req: Request) -> Self::Future { + let _node = Arc::clone(&self.node); + match req.uri().path() { + path => { + let error = format!("Unknown request: {}", path).into_bytes(); + Box::pin(async { + Ok(Response::builder() + .status(StatusCode::BAD_REQUEST) + .body(Full::new(Bytes::from(error))) + // unwrap safety: body only errors when previous chained calls failed. + .unwrap()) + }) + }, + } + } +} + +async fn handle_request< + T: Message + Default, + R: Message, + F: Fn(Arc, T) -> Result, +>( + node: Arc, request: Request, handler: F, +) -> Result<>>::Response, hyper::Error> { + // TODO: we should bound the amount of data we read to avoid allocating too much memory. + let bytes = request.into_body().collect().await?.to_bytes(); + match T::decode(bytes) { + Ok(request) => match handler(node, request) { + Ok(response) => Ok(Response::builder() + .body(Full::new(Bytes::from(response.encode_to_vec()))) + // unwrap safety: body only errors when previous chained calls failed. + .unwrap()), + Err(e) => Ok(Response::builder() + .status(StatusCode::INTERNAL_SERVER_ERROR) + .body(Full::new(Bytes::from(e.to_string().into_bytes()))) + // unwrap safety: body only errors when previous chained calls failed. + .unwrap()), + }, + Err(_) => Ok(Response::builder() + .status(StatusCode::BAD_REQUEST) + .body(Full::new(Bytes::from(b"Error parsing request".to_vec()))) + // unwrap safety: body only errors when previous chained calls failed. + .unwrap()), + } +}