use anyhow::Context as _;
use anyhow::Result;
use arc_swap::ArcSwap;
use quinn::{
crypto::rustls::QuicClientConfig, ClientConfig, Connection, Endpoint, IdleTimeout,
TransportConfig,
};
use rand::seq::IndexedRandom as _;
use solana_rpc_client::rpc_client::SerializableTransaction;
use solana_sdk::{signature::Keypair, transaction::VersionedTransaction};
use solana_tls_utils::{new_dummy_x509_certificate, SkipServerVerification};
use std::time::Instant;
use std::{
net::{SocketAddr, ToSocketAddrs as _},
sync::Arc,
time::Duration,
};
use tokio::sync::Mutex;
use crate::common::SolanaRpcClient;
use crate::swqos::common::poll_transaction_confirmation;
use crate::swqos::SwqosClientTrait;
use crate::{
constants::swqos::SPEEDLANDING_TIP_ACCOUNTS,
swqos::{SwqosType, TradeType},
};
const ALPN_TPU_PROTOCOL_ID: &[u8] = b"solana-tpu";
const SPEED_SERVER: &str = "speed-landing";
const KEEP_ALIVE_INTERVAL: Duration = Duration::from_secs(25);
const MAX_IDLE_TIMEOUT: Duration = Duration::from_secs(5 * 60);
pub struct SpeedlandingClient {
pub rpc_client: Arc<SolanaRpcClient>,
endpoint: Endpoint,
client_config: ClientConfig,
addr: SocketAddr,
connection: ArcSwap<Connection>,
reconnect: Mutex<()>,
}
impl SpeedlandingClient {
pub async fn new(rpc_url: String, endpoint_string: String, api_key: String) -> Result<Self> {
let rpc_client = SolanaRpcClient::new(rpc_url);
let keypair = Keypair::from_base58_string(&api_key);
let (cert, key) = new_dummy_x509_certificate(&keypair);
let mut crypto = rustls::ClientConfig::builder()
.dangerous()
.with_custom_certificate_verifier(SkipServerVerification::new())
.with_client_auth_cert(vec![cert], key)
.context("failed to configure client certificate")?;
crypto.alpn_protocols = vec![ALPN_TPU_PROTOCOL_ID.to_vec()];
let client_crypto = QuicClientConfig::try_from(crypto)
.context("failed to convert rustls config into quinn crypto config")?;
let mut client_config = ClientConfig::new(Arc::new(client_crypto));
let mut transport = TransportConfig::default();
transport.keep_alive_interval(Some(KEEP_ALIVE_INTERVAL));
transport.max_idle_timeout(Some(IdleTimeout::try_from(MAX_IDLE_TIMEOUT)?));
client_config.transport_config(Arc::new(transport));
let mut endpoint = Endpoint::client("0.0.0.0:0".parse()?)?;
endpoint.set_default_client_config(client_config.clone());
let addr = endpoint_string
.to_socket_addrs()?
.next()
.ok_or_else(|| anyhow::anyhow!("Address not resolved"))?;
let connection = endpoint.connect(addr, SPEED_SERVER)?.await?;
Ok(Self {
rpc_client: Arc::new(rpc_client),
endpoint,
client_config,
addr,
connection: ArcSwap::from_pointee(connection),
reconnect: Mutex::new(()),
})
}
async fn reconnect(&self) -> Result<()> {
let _guard = self.reconnect.try_lock()?;
let connection = self
.endpoint
.connect_with(self.client_config.clone(), self.addr, SPEED_SERVER)?
.await?;
self.connection.store(Arc::new(connection));
Ok(())
}
async fn try_send_bytes(connection: &Connection, payload: &[u8]) -> Result<()> {
let mut stream = connection.open_uni().await?;
stream.write_all(payload).await?;
stream.finish()?;
Ok(())
}
}
#[async_trait::async_trait]
impl SwqosClientTrait for SpeedlandingClient {
async fn send_transaction(
&self,
trade_type: TradeType,
transaction: &VersionedTransaction,
wait_confirmation: bool,
) -> Result<()> {
let start_time = Instant::now();
let signature = transaction.get_signature();
let serialized_tx = bincode::serialize(transaction)?;
let connection = self.connection.load_full();
if Self::try_send_bytes(&connection, &serialized_tx).await.is_err() {
eprintln!(" [speedlanding] {} submission failed, reconnecting", trade_type);
self.reconnect().await?;
let connection = self.connection.load_full();
if let Err(e) = Self::try_send_bytes(&connection, &serialized_tx).await {
eprintln!(" [speedlanding] {} submission failed: {:?}", trade_type, e);
return Err(e.into());
}
}
match poll_transaction_confirmation(&self.rpc_client, *signature, wait_confirmation).await {
Ok(_) => (),
Err(e) => {
println!(" signature: {:?}", signature);
println!(" [speedlanding] {} confirmation failed: {:?}", trade_type, start_time.elapsed());
return Err(e);
}
}
if wait_confirmation {
println!(" signature: {:?}", signature);
println!(" [speedlanding] {} confirmed: {:?}", trade_type, start_time.elapsed());
}
Ok(())
}
async fn send_transactions(
&self,
trade_type: TradeType,
transactions: &Vec<VersionedTransaction>,
wait_confirmation: bool,
) -> Result<()> {
for transaction in transactions {
self.send_transaction(trade_type, transaction, wait_confirmation).await?;
}
Ok(())
}
fn get_tip_account(&self) -> Result<String> {
let tip_account = *SPEEDLANDING_TIP_ACCOUNTS
.choose(&mut rand::rng())
.or_else(|| SPEEDLANDING_TIP_ACCOUNTS.first())
.unwrap();
Ok(tip_account.to_string())
}
fn get_swqos_type(&self) -> SwqosType {
SwqosType::Speedlanding
}
}