restoring jrpc_handle.rs file

Author: ayushboss

apps/pyth-lazer-agent/src/jrpc_handle.rs

@@ -0,0 +1,328 @@
+use crate::config::Config;
+use crate::lazer_publisher::LazerPublisher;
+use crate::websocket_utils::{handle_websocket_error, send_text};
+use anyhow::Error;
+use futures::{AsyncRead, AsyncWrite};
+use futures_util::io::{BufReader, BufWriter};
+use hyper_util::rt::TokioIo;
+use pyth_lazer_protocol::jrpc::{
+    GetMetadataParams, JrpcCall, JrpcError, JrpcErrorResponse, JrpcResponse, JrpcSuccessResponse,
+    JsonRpcVersion, PythLazerAgentJrpcV1, SymbolMetadata,
+};
+use soketto::Sender;
+use soketto::handshake::http::Server;
+use std::str::FromStr;
+use tokio::{pin, select};
+use tokio_util::compat::TokioAsyncReadCompatExt;
+use tracing::{debug, error, instrument};
+use url::Url;
+
+const DEFAULT_HISTORY_SERVICE_URL: &str =
+    "https://history.pyth-lazer.dourolabs.app/history/v1/symbols";
+
+pub struct JrpcConnectionContext {}
+
+#[instrument(
+    skip(server, request, lazer_publisher, context),
+    fields(component = "jrpc_ws")
+)]
+pub async fn handle_jrpc(
+    config: Config,
+    server: Server,
+    request: hyper::Request<hyper::body::Incoming>,
+    context: JrpcConnectionContext,
+    lazer_publisher: LazerPublisher,
+) {
+    if let Err(err) = try_handle_jrpc(config, server, request, context, lazer_publisher).await {
+        handle_websocket_error(err);
+    }
+}
+
+#[instrument(
+    skip(server, request, lazer_publisher, _context),
+    fields(component = "jrpc_ws")
+)]
+async fn try_handle_jrpc(
+    config: Config,
+    server: Server,
+    request: hyper::Request<hyper::body::Incoming>,
+    _context: JrpcConnectionContext,
+    lazer_publisher: LazerPublisher,
+) -> anyhow::Result<()> {
+    let stream = hyper::upgrade::on(request).await?;
+    let io = TokioIo::new(stream);
+    let stream = BufReader::new(BufWriter::new(io.compat()));
+    let (mut ws_sender, mut ws_receiver) = server.into_builder(stream).finish();
+
+    let mut receive_buf = Vec::new();
+
+    loop {
+        receive_buf.clear();
+        {
+            // soketto is not cancel-safe, so we need to store the future and poll it
+            // in the inner loop.
+            let receive = async { ws_receiver.receive(&mut receive_buf).await };
+            pin!(receive);
+            #[allow(clippy::never_loop, reason = "false positive")] // false positive
+            loop {
+                select! {
+                    _result = &mut receive => {
+                        break
+                    }
+                }
+            }
+        }
+
+        match handle_jrpc_inner(&config, &mut ws_sender, &mut receive_buf, &lazer_publisher).await {
+            Ok(_) => {}
+            Err(err) => {
+                debug!("Error handling JRPC request: {}", err);
+                send_text(
+                    &mut ws_sender,
+                    serde_json::to_string::<JrpcResponse<()>>(&JrpcResponse::Error(
+                        JrpcErrorResponse {
+                            jsonrpc: JsonRpcVersion::V2,
+                            error: JrpcError::InternalError.into(),
+                            id: None,
+                        },
+                    ))?
+                    .as_str(),
+                )
+                .await?;
+            }
+        }
+    }
+}
+
+async fn handle_jrpc_inner<T: AsyncRead + AsyncWrite + Unpin>(
+    config: &Config,
+    sender: &mut Sender<T>,
+    receive_buf: &mut Vec<u8>,
+    lazer_publisher: &LazerPublisher,
+) -> anyhow::Result<()> {
+    match serde_json::from_slice::<PythLazerAgentJrpcV1>(receive_buf.as_slice()) {
+        Ok(jrpc_request) => match jrpc_request.params {
+            JrpcCall::PushUpdate(request_params) => {
+                match lazer_publisher
+                    .push_feed_update(request_params.into())
+                    .await
+                {
+                    Ok(_) => {
+                        send_text(
+                            sender,
+                            serde_json::to_string::<JrpcResponse<String>>(&JrpcResponse::Success(
+                                JrpcSuccessResponse::<String> {
+                                    jsonrpc: JsonRpcVersion::V2,
+                                    result: "success".to_string(),
+                                    id: jrpc_request.id,
+                                },
+                            ))?
+                            .as_str(),
+                        )
+                        .await?;
+                    }
+                    Err(err) => {
+                        debug!("error while sending updates: {:?}", err);
+                        send_text(
+                            sender,
+                            serde_json::to_string::<JrpcResponse<()>>(&JrpcResponse::Error(
+                                JrpcErrorResponse {
+                                    jsonrpc: JsonRpcVersion::V2,
+                                    error: JrpcError::InternalError.into(),
+                                    id: Some(jrpc_request.id),
+                                },
+                            ))?
+                            .as_str(),
+                        )
+                        .await?;
+                    }
+                }
+            }
+            JrpcCall::GetMetadata(request_params) => match get_metadata(config.clone()).await {
+                Ok(symbols) => {
+                    let symbols = filter_symbols(symbols.clone(), request_params);
+
+                    send_text(
+                        sender,
+                        serde_json::to_string::<JrpcResponse<Vec<SymbolMetadata>>>(
+                            &JrpcResponse::Success(JrpcSuccessResponse::<Vec<SymbolMetadata>> {
+                                jsonrpc: JsonRpcVersion::V2,
+                                result: symbols,
+                                id: jrpc_request.id,
+                            }),
+                        )?
+                        .as_str(),
+                    )
+                    .await?;
+                }
+                Err(err) => {
+                    error!("error while retrieving metadata: {:?}", err);
+                    send_text(
+                        sender,
+                        serde_json::to_string::<JrpcResponse<()>>(&JrpcResponse::Error(
+                            JrpcErrorResponse {
+                                jsonrpc: JsonRpcVersion::V2,
+                                // note: right now specifying an invalid method results in a parse error
+                                error: JrpcError::InternalError.into(),
+                                id: None,
+                            },
+                        ))?
+                        .as_str(),
+                    )
+                    .await?;
+                }
+            },
+        },
+        Err(err) => {
+            debug!("Error parsing JRPC request: {}", err);
+            send_text(
+                sender,
+                serde_json::to_string::<JrpcResponse<()>>(&JrpcResponse::Error(
+                    JrpcErrorResponse {
+                        jsonrpc: JsonRpcVersion::V2,
+                        error: JrpcError::ParseError(err.to_string()).into(),
+                        id: None,
+                    },
+                ))?
+                .as_str(),
+            )
+            .await?;
+        }
+    }
+    Ok(())
+}
+
+async fn get_metadata(config: Config) -> Result<Vec<SymbolMetadata>, Error> {
+    let result = reqwest::get(
+        config
+            .history_service_url
+            .unwrap_or(Url::from_str(DEFAULT_HISTORY_SERVICE_URL)?),
+    )
+    .await?;
+
+    if result.status().is_success() {
+        Ok(serde_json::from_str::<Vec<SymbolMetadata>>(
+            &result.text().await?,
+        )?)
+    } else {
+        Err(anyhow::anyhow!(
+            "Error getting metadata (status_code={}, body={})",
+            result.status(),
+            result.text().await.unwrap_or("none".to_string())
+        ))
+    }
+}
+
+fn filter_symbols(
+    symbols: Vec<SymbolMetadata>,
+    get_metadata_params: GetMetadataParams,
+) -> Vec<SymbolMetadata> {
+    let names = &get_metadata_params.names.clone();
+    let asset_types = &get_metadata_params.asset_types.clone();
+
+    let res: Vec<SymbolMetadata> = symbols
+        .into_iter()
+        .filter(|symbol| {
+            if let Some(names) = names {
+                if !names.contains(&symbol.name) {
+                    return false;
+                }
+            }
+
+            if let Some(asset_types) = asset_types {
+                if !asset_types.contains(&symbol.asset_type) {
+                    return false;
+                }
+            }
+
+            true
+        })
+        .collect();
+
+    res
+}
+
+#[cfg(test)]
+pub mod tests {
+    use super::*;
+    use pyth_lazer_protocol::router::{Channel, FixedRate, PriceFeedId};
+    use pyth_lazer_protocol::symbol_state::SymbolState;
+    use std::net::SocketAddr;
+
+    fn gen_test_symbol(name: String, asset_type: String) -> SymbolMetadata {
+        SymbolMetadata {
+            pyth_lazer_id: PriceFeedId(1),
+            name,
+            symbol: "".to_string(),
+            description: "".to_string(),
+            asset_type,
+            exponent: 0,
+            cmc_id: None,
+            funding_rate_interval: None,
+            min_publishers: 0,
+            min_channel: Channel::FixedRate(FixedRate::MIN),
+            state: SymbolState::Stable,
+            hermes_id: None,
+            quote_currency: None,
+        }
+    }
+
+    #[tokio::test]
+    #[ignore]
+    async fn test_try_get_metadata() {
+        let config = Config {
+            listen_address: SocketAddr::from(([127, 0, 0, 1], 0)),
+            relayer_urls: vec![],
+            authorization_token: None,
+            publish_keypair_path: Default::default(),
+            publish_interval_duration: Default::default(),
+            history_service_url: None,
+        };
+
+        println!("{:?}", get_metadata(config).await.unwrap());
+    }
+
+    #[test]
+    fn test_filter_symbols() {
+        let symbol1 = gen_test_symbol("BTC".to_string(), "crypto".to_string());
+        let symbol2 = gen_test_symbol("XMR".to_string(), "crypto".to_string());
+        let symbol3 = gen_test_symbol("BTCUSDT".to_string(), "funding-rate".to_string());
+        let symbols = vec![symbol1.clone(), symbol2.clone(), symbol3.clone()];
+
+        // just a name filter
+        assert_eq!(
+            filter_symbols(
+                symbols.clone(),
+                GetMetadataParams {
+                    names: Some(vec!["XMR".to_string()]),
+                    asset_types: None,
+                },
+            ),
+            vec![symbol2.clone()]
+        );
+
+        // just an asset type filter
+        assert_eq!(
+            filter_symbols(
+                symbols.clone(),
+                GetMetadataParams {
+                    names: None,
+                    asset_types: Some(vec!["crypto".to_string()]),
+                },
+            ),
+            vec![symbol1.clone(), symbol2.clone()]
+        );
+
+        // name and asset type
+        assert_eq!(
+            filter_symbols(
+                symbols.clone(),
+                GetMetadataParams {
+                    names: Some(vec!["BTC".to_string()]),
+                    asset_types: Some(vec!["crypto".to_string()]),
+                },
+            ),
+            vec![symbol1.clone()]
+        );
+    }
+}