//! ## RLDP - Reliable Large Datagram Protocol
//!
//! A reliable arbitrary-size datagram protocol built upon the ADNL, called RLDP, is used instead
//! of a TCP-like protocol. This reliable datagram protocol can be employed, for instance,
//! to send RPC queries to remote hosts and receive answers from them.
//!
//! TODO
use std::sync::Arc;
use anyhow::Result;
use frunk_core::hlist::{HCons, HList, IntoTuple2, Selector};
use frunk_core::indices::{Here, There};
pub(crate) use decoder::RaptorQDecoder;
pub(crate) use encoder::RaptorQEncoder;
pub use node::{Node, NodeMetrics, NodeOptions};
use crate::adnl;
use crate::subscriber::QuerySubscriber;
use crate::util::{DeferredInitialization, NetworkBuilder};
pub(crate) mod compression;
mod decoder;
mod encoder;
mod incoming_transfer;
mod node;
mod outgoing_transfer;
mod transfers_cache;
pub(crate) type Deferred = Result<(Arc<adnl::Node>, Vec<Arc<dyn QuerySubscriber>>, NodeOptions)>;
impl DeferredInitialization for Deferred {
type Initialized = Arc<Node>;
fn initialize(self) -> Result<Self::Initialized> {
let (adnl, subscribers, options) = self?;
Node::new(adnl, subscribers, options)
}
}
impl<L, A, R> NetworkBuilder<L, (A, R)>
where
L: HList + Selector<adnl::Deferred, A>,
HCons<Deferred, L>: IntoTuple2,
{
/// Creates RLDP network layer
///
/// See [`with_rldp_ext`] if you need an RLDP node with additional subscribers
///
/// [`with_rldp_ext`]: fn@crate::util::NetworkBuilder::with_rldp_ext
///
/// # Examples
///
/// ```
/// use std::error::Error;
///
/// use everscale_network::{adnl, rldp, NetworkBuilder};
///
/// #[tokio::main]
/// async fn main() -> Result<(), Box<dyn Error>> {
/// let keystore = adnl::Keystore::builder()
/// .with_tagged_key([0; 32], 0)?
/// .build();
///
/// let adnl_options = adnl::NodeOptions::default();
/// let rldp_options = rldp::NodeOptions::default();
///
/// let (adnl, rldp) = NetworkBuilder::with_adnl("127.0.0.1:10000", keystore, adnl_options)
/// .with_rldp(rldp_options)
/// .build()?;
/// Ok(())
/// }
/// ```
#[allow(clippy::type_complexity)]
pub fn with_rldp(
self,
options: NodeOptions,
) -> NetworkBuilder<HCons<Deferred, L>, (There<A>, Here)> {
self.with_rldp_ext(options, Vec::new())
}
/// Creates RLDP network layer with additional RLDP query subscribers
///
/// # Examples
///
/// ```
/// use std::borrow::Cow;
/// use std::error::Error;
/// use std::sync::Arc;
///
/// use anyhow::Result;
/// use everscale_network::{
/// adnl, rldp, NetworkBuilder, QueryConsumingResult, QuerySubscriber, SubscriberContext,
/// };
///
/// struct LoggerSubscriber;
///
/// #[async_trait::async_trait]
/// impl QuerySubscriber for LoggerSubscriber {
/// async fn try_consume_query<'a>(
/// &self,
/// ctx: SubscriberContext<'a>,
/// constructor: u32,
/// query: Cow<'a, [u8]>,
/// ) -> Result<QueryConsumingResult<'a>> {
/// println!("received {constructor}");
/// Ok(QueryConsumingResult::Rejected(query))
/// }
/// }
///
/// #[tokio::main]
/// async fn main() -> Result<(), Box<dyn Error>> {
/// let keystore = adnl::Keystore::builder()
/// .with_tagged_key([0; 32], 0)?
/// .build();
///
/// let adnl_options = adnl::NodeOptions::default();
/// let rldp_options = rldp::NodeOptions::default();
///
/// let subscriber = Arc::new(LoggerSubscriber);
///
/// let (adnl, rldp) = NetworkBuilder::with_adnl("127.0.0.1:10000", keystore, adnl_options)
/// .with_rldp_ext(rldp_options, vec![subscriber])
/// .build()?;
/// Ok(())
/// }
/// ```
#[allow(clippy::type_complexity)]
pub fn with_rldp_ext(
self,
options: NodeOptions,
subscribers: Vec<Arc<dyn QuerySubscriber>>,
) -> NetworkBuilder<HCons<Deferred, L>, (There<A>, Here)> {
let deferred = match self.0.get() {
Ok(adnl) => Ok((adnl.clone(), subscribers, options)),
Err(_) => Err(anyhow::anyhow!("ADNL was not initialized")),
};
NetworkBuilder(self.0.prepend(deferred), Default::default())
}
}