1091 lines
44 KiB
Rust
1091 lines
44 KiB
Rust
// TODO: this file is way too big now. move things into other modules
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use crate::block_number::block_needed;
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use crate::config::{AppConfig, TopConfig};
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use crate::frontend::authorization::{AuthorizedRequest, RequestMetadata};
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use crate::jsonrpc::JsonRpcForwardedResponse;
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use crate::jsonrpc::JsonRpcForwardedResponseEnum;
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use crate::jsonrpc::JsonRpcRequest;
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use crate::jsonrpc::JsonRpcRequestEnum;
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use crate::rpcs::blockchain::{ArcBlock, BlockId};
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use crate::rpcs::connections::Web3Connections;
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use crate::rpcs::request::OpenRequestHandleMetrics;
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use crate::rpcs::transactions::TxStatus;
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use crate::stats::{ProxyResponseStat, StatEmitter, Web3ProxyStat};
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use anyhow::Context;
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use axum::extract::ws::Message;
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use axum::headers::{Referer, UserAgent};
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use deferred_rate_limiter::DeferredRateLimiter;
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use derive_more::From;
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use ethers::core::utils::keccak256;
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use ethers::prelude::{Address, Block, Bytes, TxHash, H256, U64};
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use futures::future::Abortable;
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use futures::future::{join_all, AbortHandle};
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use futures::stream::FuturesUnordered;
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use futures::stream::StreamExt;
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use futures::Future;
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use hashbrown::HashMap;
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use ipnet::IpNet;
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use metered::{metered, ErrorCount, HitCount, ResponseTime, Throughput};
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use migration::{Migrator, MigratorTrait};
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use moka::future::Cache;
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use redis_rate_limiter::{DeadpoolRuntime, RedisConfig, RedisPool, RedisRateLimiter};
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use sea_orm::prelude::Decimal;
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use sea_orm::DatabaseConnection;
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use serde::Serialize;
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use serde_json::json;
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use std::fmt;
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use std::net::IpAddr;
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use std::pin::Pin;
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use std::str::FromStr;
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use std::sync::atomic::{self, AtomicUsize};
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use std::sync::Arc;
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use std::time::Duration;
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use tokio::sync::{broadcast, watch, Semaphore};
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use tokio::task::JoinHandle;
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use tokio::time::timeout;
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use tokio_stream::wrappers::{BroadcastStream, WatchStream};
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use tracing::{error, info, trace, warn};
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use ulid::Ulid;
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// TODO: make this customizable?
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static APP_USER_AGENT: &str = concat!(
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"satoshiandkin/",
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env!("CARGO_PKG_NAME"),
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"/",
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env!("CARGO_PKG_VERSION"),
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);
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/// block hash, method, params
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// TODO: better name
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type ResponseCacheKey = (H256, String, Option<String>);
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type ResponseCache =
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Cache<ResponseCacheKey, JsonRpcForwardedResponse, hashbrown::hash_map::DefaultHashBuilder>;
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pub type AnyhowJoinHandle<T> = JoinHandle<anyhow::Result<T>>;
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#[derive(Clone, Debug, Default, From)]
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/// TODO: rename this?
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pub struct UserKeyData {
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pub user_key_id: u64,
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/// if None, allow unlimited queries
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pub max_requests_per_period: Option<u64>,
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// if None, allow unlimited concurrent requests
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pub max_concurrent_requests: Option<u64>,
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/// if None, allow any Origin
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pub allowed_origins: Option<Vec<String>>,
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/// if None, allow any Referer
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pub allowed_referers: Option<Vec<Referer>>,
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/// if None, allow any UserAgent
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pub allowed_user_agents: Option<Vec<UserAgent>>,
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/// if None, allow any IP Address
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pub allowed_ips: Option<Vec<IpNet>>,
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/// Chance to save reverting eth_call, eth_estimateGas, and eth_sendRawTransaction to the database.
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pub log_revert_chance: Decimal,
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}
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/// The application
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// TODO: this debug impl is way too verbose. make something smaller
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// TODO: i'm sure this is more arcs than necessary, but spawning futures makes references hard
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pub struct Web3ProxyApp {
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/// Send requests to the best server available
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pub balanced_rpcs: Arc<Web3Connections>,
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/// Send private requests (like eth_sendRawTransaction) to all these servers
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pub private_rpcs: Option<Arc<Web3Connections>>,
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response_cache: ResponseCache,
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// don't drop this or the sender will stop working
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// TODO: broadcast channel instead?
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head_block_receiver: watch::Receiver<ArcBlock>,
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pending_tx_sender: broadcast::Sender<TxStatus>,
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pub config: AppConfig,
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pub db_conn: Option<sea_orm::DatabaseConnection>,
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/// prometheus metrics
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app_metrics: Arc<Web3ProxyAppMetrics>,
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open_request_handle_metrics: Arc<OpenRequestHandleMetrics>,
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/// store pending transactions that we've seen so that we don't send duplicates to subscribers
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pub pending_transactions: Cache<TxHash, TxStatus, hashbrown::hash_map::DefaultHashBuilder>,
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pub frontend_ip_rate_limiter: Option<DeferredRateLimiter<IpAddr>>,
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pub frontend_key_rate_limiter: Option<DeferredRateLimiter<Ulid>>,
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pub login_rate_limiter: Option<RedisRateLimiter>,
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pub vredis_pool: Option<RedisPool>,
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pub user_key_cache: Cache<Ulid, UserKeyData, hashbrown::hash_map::DefaultHashBuilder>,
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pub user_key_semaphores: Cache<u64, Arc<Semaphore>, hashbrown::hash_map::DefaultHashBuilder>,
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pub ip_semaphores: Cache<IpAddr, Arc<Semaphore>, hashbrown::hash_map::DefaultHashBuilder>,
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pub stat_sender: Option<flume::Sender<Web3ProxyStat>>,
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}
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/// flatten a JoinError into an anyhow error
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/// Useful when joining multiple futures.
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pub async fn flatten_handle<T>(handle: AnyhowJoinHandle<T>) -> anyhow::Result<T> {
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match handle.await {
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Ok(Ok(result)) => Ok(result),
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Ok(Err(err)) => Err(err),
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Err(err) => Err(err.into()),
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}
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}
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/// return the first error or okay if everything worked
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pub async fn flatten_handles<T>(
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mut handles: FuturesUnordered<AnyhowJoinHandle<T>>,
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) -> anyhow::Result<()> {
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while let Some(x) = handles.next().await {
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match x {
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Err(e) => return Err(e.into()),
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Ok(Err(e)) => return Err(e),
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Ok(Ok(_)) => continue,
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}
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}
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Ok(())
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}
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/// Connect to the database and run migrations
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pub async fn get_migrated_db(
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db_url: String,
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min_connections: u32,
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max_connections: u32,
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) -> anyhow::Result<DatabaseConnection> {
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// TODO: scrub credentials and then include the db_url in logs
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info!("Connecting to db");
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let mut db_opt = sea_orm::ConnectOptions::new(db_url);
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// TODO: load all these options from the config file. i think mysql default max is 100
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// TODO: sqlx logging only in debug. way too verbose for production
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db_opt
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.connect_timeout(Duration::from_secs(30))
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.min_connections(min_connections)
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.max_connections(max_connections)
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.sqlx_logging(false);
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// .sqlx_logging_level(log::LevelFilter::Info);
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let db = sea_orm::Database::connect(db_opt).await?;
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// TODO: if error, roll back?
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Migrator::up(&db, None).await?;
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Ok(db)
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}
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#[metered(registry = Web3ProxyAppMetrics, registry_expr = self.app_metrics, visibility = pub)]
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impl Web3ProxyApp {
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/// The main entrypoint.
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pub async fn spawn(
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top_config: TopConfig,
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num_workers: usize,
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) -> anyhow::Result<(
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Arc<Web3ProxyApp>,
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Pin<Box<dyn Future<Output = anyhow::Result<()>>>>,
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)> {
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// safety checks on the config
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assert!(
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top_config.app.redirect_user_url.contains("{{user_id}}"),
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"redirect user url must contain \"{{user_id}}\""
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);
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// setup metrics
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let app_metrics = Default::default();
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let open_request_handle_metrics: Arc<OpenRequestHandleMetrics> = Default::default();
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// connect to mysql and make sure the latest migrations have run
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let db_conn = if let Some(db_url) = top_config.app.db_url.clone() {
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let db_min_connections = top_config
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.app
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.db_min_connections
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.unwrap_or(num_workers as u32);
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// TODO: what default multiple?
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let db_max_connections = top_config
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.app
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.db_max_connections
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.unwrap_or(db_min_connections * 2);
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let db = get_migrated_db(db_url, db_min_connections, db_max_connections).await?;
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Some(db)
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} else {
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info!("no database");
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None
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};
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let balanced_rpcs = top_config.balanced_rpcs;
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let private_rpcs = top_config.private_rpcs.unwrap_or_default();
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// TODO: try_join_all instead?
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let handles = FuturesUnordered::new();
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// make a http shared client
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// TODO: can we configure the connection pool? should we?
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// TODO: timeouts from config. defaults are hopefully good
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let http_client = Some(
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reqwest::ClientBuilder::new()
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.connect_timeout(Duration::from_secs(5))
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.timeout(Duration::from_secs(60))
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.user_agent(APP_USER_AGENT)
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.build()?,
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);
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// create a connection pool for redis
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// a failure to connect does NOT block the application from starting
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let vredis_pool = match top_config.app.volatile_redis_url.as_ref() {
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Some(redis_url) => {
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// TODO: scrub credentials and then include the redis_url in logs
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info!("Connecting to vredis");
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// TODO: what is a good default?
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let redis_max_connections = top_config
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.app
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.volatile_redis_max_connections
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.unwrap_or(num_workers * 2);
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// TODO: what are reasonable timeouts?
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let redis_pool = RedisConfig::from_url(redis_url)
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.builder()?
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.max_size(redis_max_connections)
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.runtime(DeadpoolRuntime::Tokio1)
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.build()?;
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// test the redis pool
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if let Err(err) = redis_pool.get().await {
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error!(
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?err,
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"failed to connect to vredis. some features will be disabled"
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);
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};
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Some(redis_pool)
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}
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None => {
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warn!("no redis connection. some features will be disabled");
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None
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}
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};
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// setup a channel for receiving stats (generally with a high cardinality, such as per-user)
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// we do this in a channel so we don't slow down our response to the users
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let stat_sender = if let Some(db_conn) = db_conn.clone() {
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// TODO: sender and receiver here are a little confusing. because the thing that reads the receiver is what actually submits the stats
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let (stat_sender, stat_handle, save_handle) = {
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// TODO: period from config instead of always being 60 seconds
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let emitter = StatEmitter::new(top_config.app.chain_id, db_conn, 60);
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emitter.spawn().await?
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};
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handles.push(stat_handle);
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handles.push(save_handle);
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Some(stat_sender)
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} else {
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warn!("cannot store stats without a redis connection");
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None
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};
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// TODO: i don't like doing Block::default here! Change this to "None"?
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let (head_block_sender, head_block_receiver) = watch::channel(Arc::new(Block::default()));
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// TODO: will one receiver lagging be okay? how big should this be?
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let (pending_tx_sender, pending_tx_receiver) = broadcast::channel(256);
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// TODO: use this? it could listen for confirmed transactions and then clear pending_transactions, but the head_block_sender is doing that
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// TODO: don't drop the pending_tx_receiver. instead, read it to mark transactions as "seen". once seen, we won't re-send them?
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// TODO: once a transaction is "Confirmed" we remove it from the map. this should prevent major memory leaks.
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// TODO: we should still have some sort of expiration or maximum size limit for the map
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drop(pending_tx_receiver);
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// TODO: capacity from configs
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// all these are the same size, so no need for a weigher
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// TODO: ttl on this? or is max_capacity fine?
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let pending_transactions = Cache::builder()
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.max_capacity(10_000)
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.build_with_hasher(hashbrown::hash_map::DefaultHashBuilder::new());
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// keep 1GB of blocks in the cache
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// TODO: limits from config
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// these blocks don't have full transactions, but they do have rather variable amounts of transaction hashes
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// TODO: how can we do the weigher better? this is going to be slow!
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let block_map = Cache::builder()
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.max_capacity(1024 * 1024 * 1024)
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.weigher(|_k, v: &Arc<Block<TxHash>>| {
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// TODO: is this good enough?
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v.transactions.len().try_into().unwrap_or(u32::MAX)
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})
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.build_with_hasher(hashbrown::hash_map::DefaultHashBuilder::new());
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// connect to the load balanced rpcs
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let (balanced_rpcs, balanced_handle) = Web3Connections::spawn(
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top_config.app.chain_id,
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balanced_rpcs,
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http_client.clone(),
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vredis_pool.clone(),
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block_map.clone(),
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Some(head_block_sender),
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top_config.app.min_sum_soft_limit,
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top_config.app.min_synced_rpcs,
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Some(pending_tx_sender.clone()),
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pending_transactions.clone(),
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open_request_handle_metrics.clone(),
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)
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.await
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.context("spawning balanced rpcs")?;
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// save the handle to catch any errors
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handles.push(balanced_handle);
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// connect to the private rpcs
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// only some chains have this, so this is optional
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let private_rpcs = if private_rpcs.is_empty() {
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// TODO: do None instead of clone?
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warn!("No private relays configured. Any transactions will be broadcast to the public mempool!");
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None
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} else {
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let (private_rpcs, private_handle) = Web3Connections::spawn(
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top_config.app.chain_id,
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private_rpcs,
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http_client.clone(),
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vredis_pool.clone(),
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block_map,
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// subscribing to new heads here won't work well. if they are fast, they might be ahead of balanced_rpcs
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None,
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// minimum doesn't really matter on private rpcs
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1,
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1,
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// TODO: subscribe to pending transactions on the private rpcs? they seem to have low rate limits
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None,
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pending_transactions.clone(),
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open_request_handle_metrics.clone(),
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)
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.await
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.context("spawning private_rpcs")?;
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// save the handle to catch any errors
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handles.push(private_handle);
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Some(private_rpcs)
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};
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// create rate limiters
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// these are optional. they require redis
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let mut frontend_ip_rate_limiter = None;
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let mut frontend_key_rate_limiter = None;
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let mut login_rate_limiter = None;
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if let Some(redis_pool) = vredis_pool.as_ref() {
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let rpc_rrl = RedisRateLimiter::new(
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"web3_proxy",
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"frontend",
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top_config.app.frontend_rate_limit_per_minute,
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60.0,
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redis_pool.clone(),
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);
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// these two rate limiters can share the base limiter
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// TODO: take cache_size from config
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frontend_ip_rate_limiter = Some(DeferredRateLimiter::<IpAddr>::new(
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10_000,
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"ip",
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rpc_rrl.clone(),
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None,
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));
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frontend_key_rate_limiter = Some(DeferredRateLimiter::<Ulid>::new(
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10_000, "key", rpc_rrl, None,
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));
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// don't defer this one because it will have a low request per peiod
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login_rate_limiter = Some(RedisRateLimiter::new(
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"web3_proxy",
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"login",
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top_config.app.login_rate_limit_per_minute,
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60.0,
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redis_pool.clone(),
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));
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}
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|
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// keep 1GB of blocks in the cache
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// responses can be very different in sizes, so this definitely needs a weigher
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// TODO: max_capacity from config
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// TODO: don't allow any response to be bigger than X% of the cache
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let response_cache = Cache::builder()
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.max_capacity(1024 * 1024 * 1024)
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.weigher(|k: &(H256, String, Option<String>), v| {
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// TODO: make this weigher past. serializing json is not fast
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let mut size = (k.1).len();
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|
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if let Some(params) = &k.2 {
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size += params.len()
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}
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|
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if let Ok(v) = serde_json::to_string(v) {
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size += v.len();
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|
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// the or in unwrap_or is probably never called
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size.try_into().unwrap_or(u32::MAX)
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} else {
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// this seems impossible
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u32::MAX
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}
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})
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.build_with_hasher(hashbrown::hash_map::DefaultHashBuilder::new());
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|
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// all the users are the same size, so no need for a weigher
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// if there is no database of users, there will be no keys and so this will be empty
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// TODO: max_capacity from config
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// TODO: ttl from config
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let user_key_cache = Cache::builder()
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.max_capacity(10_000)
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.time_to_live(Duration::from_secs(60))
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.build_with_hasher(hashbrown::hash_map::DefaultHashBuilder::new());
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|
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// create semaphores for concurrent connection limits
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|
// TODO: what should tti be for semaphores?
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let user_key_semaphores = Cache::builder()
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.time_to_idle(Duration::from_secs(120))
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.build_with_hasher(hashbrown::hash_map::DefaultHashBuilder::new());
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let ip_semaphores = Cache::builder()
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.time_to_idle(Duration::from_secs(120))
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.build_with_hasher(hashbrown::hash_map::DefaultHashBuilder::new());
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|
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let app = Self {
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config: top_config.app,
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balanced_rpcs,
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private_rpcs,
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response_cache,
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head_block_receiver,
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pending_tx_sender,
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pending_transactions,
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frontend_ip_rate_limiter,
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frontend_key_rate_limiter,
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login_rate_limiter,
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db_conn,
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vredis_pool,
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app_metrics,
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open_request_handle_metrics,
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user_key_cache,
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user_key_semaphores,
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ip_semaphores,
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stat_sender,
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};
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|
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let app = Arc::new(app);
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|
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let handle = Box::pin(flatten_handles(handles));
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|
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Ok((app, handle))
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}
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|
|
|
pub fn prometheus_metrics(&self) -> String {
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let globals = HashMap::new();
|
|
// TODO: what globals? should this be the hostname or what?
|
|
// globals.insert("service", "web3_proxy");
|
|
|
|
#[derive(Serialize)]
|
|
struct CombinedMetrics<'a> {
|
|
app: &'a Web3ProxyAppMetrics,
|
|
backend_rpc: &'a OpenRequestHandleMetrics,
|
|
}
|
|
|
|
let metrics = CombinedMetrics {
|
|
app: &self.app_metrics,
|
|
backend_rpc: &self.open_request_handle_metrics,
|
|
};
|
|
|
|
serde_prometheus::to_string(&metrics, Some("web3_proxy"), globals)
|
|
.expect("prometheus metrics should always serialize")
|
|
}
|
|
|
|
#[measure([ErrorCount, HitCount, ResponseTime, Throughput])]
|
|
pub async fn eth_subscribe<'a>(
|
|
self: &'a Arc<Self>,
|
|
authorized_request: Arc<AuthorizedRequest>,
|
|
payload: JsonRpcRequest,
|
|
subscription_count: &'a AtomicUsize,
|
|
// TODO: taking a sender for Message instead of the exact json we are planning to send feels wrong, but its easier for now
|
|
response_sender: flume::Sender<Message>,
|
|
) -> anyhow::Result<(AbortHandle, JsonRpcForwardedResponse)> {
|
|
let (subscription_abort_handle, subscription_registration) = AbortHandle::new_pair();
|
|
|
|
// TODO: this only needs to be unique per connection. we don't need it globably unique
|
|
let subscription_id = subscription_count.fetch_add(1, atomic::Ordering::SeqCst);
|
|
let subscription_id = U64::from(subscription_id);
|
|
|
|
// save the id so we can use it in the response
|
|
let id = payload.id.clone();
|
|
|
|
// TODO: calling json! on every request is probably not fast. but we can only match against
|
|
// TODO: i think we need a stricter EthSubscribeRequest type that JsonRpcRequest can turn into
|
|
match payload.params {
|
|
Some(x) if x == json!(["newHeads"]) => {
|
|
let head_block_receiver = self.head_block_receiver.clone();
|
|
|
|
trace!(?subscription_id, "new heads subscription");
|
|
tokio::spawn(async move {
|
|
let mut head_block_receiver = Abortable::new(
|
|
WatchStream::new(head_block_receiver),
|
|
subscription_registration,
|
|
);
|
|
|
|
while let Some(new_head) = head_block_receiver.next().await {
|
|
// TODO: make a struct for this? using our JsonRpcForwardedResponse won't work because it needs an id
|
|
let msg = json!({
|
|
"jsonrpc": "2.0",
|
|
"method":"eth_subscription",
|
|
"params": {
|
|
"subscription": subscription_id,
|
|
// TODO: option to include full transaction objects instead of just the hashes?
|
|
"result": new_head.as_ref(),
|
|
},
|
|
});
|
|
|
|
// TODO: do clients support binary messages?
|
|
let msg = Message::Text(
|
|
serde_json::to_string(&msg).expect("this should always be valid json"),
|
|
);
|
|
|
|
if response_sender.send_async(msg).await.is_err() {
|
|
// TODO: cancel this subscription earlier? select on head_block_receiver.next() and an abort handle?
|
|
break;
|
|
};
|
|
}
|
|
|
|
trace!(?subscription_id, "closed new heads subscription");
|
|
});
|
|
}
|
|
Some(x) if x == json!(["newPendingTransactions"]) => {
|
|
let pending_tx_receiver = self.pending_tx_sender.subscribe();
|
|
|
|
let mut pending_tx_receiver = Abortable::new(
|
|
BroadcastStream::new(pending_tx_receiver),
|
|
subscription_registration,
|
|
);
|
|
|
|
trace!(?subscription_id, "pending transactions subscription");
|
|
tokio::spawn(async move {
|
|
while let Some(Ok(new_tx_state)) = pending_tx_receiver.next().await {
|
|
let new_tx = match new_tx_state {
|
|
TxStatus::Pending(tx) => tx,
|
|
TxStatus::Confirmed(..) => continue,
|
|
TxStatus::Orphaned(tx) => tx,
|
|
};
|
|
|
|
// TODO: make a struct for this? using our JsonRpcForwardedResponse won't work because it needs an id
|
|
let msg = json!({
|
|
"jsonrpc": "2.0",
|
|
"method": "eth_subscription",
|
|
"params": {
|
|
"subscription": subscription_id,
|
|
"result": new_tx.hash,
|
|
},
|
|
});
|
|
|
|
let msg =
|
|
Message::Text(serde_json::to_string(&msg).expect("we made this `msg`"));
|
|
|
|
if response_sender.send_async(msg).await.is_err() {
|
|
// TODO: cancel this subscription earlier? select on head_block_receiver.next() and an abort handle?
|
|
break;
|
|
};
|
|
}
|
|
|
|
trace!(?subscription_id, "closed new heads subscription");
|
|
});
|
|
}
|
|
Some(x) if x == json!(["newPendingFullTransactions"]) => {
|
|
// TODO: too much copy/pasta with newPendingTransactions
|
|
let pending_tx_receiver = self.pending_tx_sender.subscribe();
|
|
|
|
let mut pending_tx_receiver = Abortable::new(
|
|
BroadcastStream::new(pending_tx_receiver),
|
|
subscription_registration,
|
|
);
|
|
|
|
trace!(?subscription_id, "pending transactions subscription");
|
|
|
|
// TODO: do something with this handle?
|
|
tokio::spawn(async move {
|
|
while let Some(Ok(new_tx_state)) = pending_tx_receiver.next().await {
|
|
let new_tx = match new_tx_state {
|
|
TxStatus::Pending(tx) => tx,
|
|
TxStatus::Confirmed(..) => continue,
|
|
TxStatus::Orphaned(tx) => tx,
|
|
};
|
|
|
|
// TODO: make a struct for this? using our JsonRpcForwardedResponse won't work because it needs an id
|
|
let msg = json!({
|
|
"jsonrpc": "2.0",
|
|
"method": "eth_subscription",
|
|
"params": {
|
|
"subscription": subscription_id,
|
|
// upstream just sends the txid, but we want to send the whole transaction
|
|
"result": new_tx,
|
|
},
|
|
});
|
|
|
|
let msg = Message::Text(
|
|
serde_json::to_string(&msg).expect("we made this message"),
|
|
);
|
|
|
|
if response_sender.send_async(msg).await.is_err() {
|
|
// TODO: cancel this subscription earlier? select on head_block_receiver.next() and an abort handle?
|
|
break;
|
|
};
|
|
}
|
|
|
|
trace!(?subscription_id, "closed new heads subscription");
|
|
});
|
|
}
|
|
Some(x) if x == json!(["newPendingRawTransactions"]) => {
|
|
// TODO: too much copy/pasta with newPendingTransactions
|
|
let pending_tx_receiver = self.pending_tx_sender.subscribe();
|
|
|
|
let mut pending_tx_receiver = Abortable::new(
|
|
BroadcastStream::new(pending_tx_receiver),
|
|
subscription_registration,
|
|
);
|
|
|
|
trace!(?subscription_id, "pending transactions subscription");
|
|
|
|
// TODO: do something with this handle?
|
|
tokio::spawn(async move {
|
|
while let Some(Ok(new_tx_state)) = pending_tx_receiver.next().await {
|
|
let new_tx = match new_tx_state {
|
|
TxStatus::Pending(tx) => tx,
|
|
TxStatus::Confirmed(..) => continue,
|
|
TxStatus::Orphaned(tx) => tx,
|
|
};
|
|
|
|
// TODO: make a struct for this? using our JsonRpcForwardedResponse won't work because it needs an id
|
|
let msg = json!({
|
|
"jsonrpc": "2.0",
|
|
"method": "eth_subscription",
|
|
"params": {
|
|
"subscription": subscription_id,
|
|
// upstream just sends the txid, but we want to send the raw transaction
|
|
"result": new_tx.rlp(),
|
|
},
|
|
});
|
|
|
|
let msg = Message::Text(
|
|
serde_json::to_string(&msg).expect("this message was just built"),
|
|
);
|
|
|
|
if response_sender.send_async(msg).await.is_err() {
|
|
// TODO: cancel this subscription earlier? select on head_block_receiver.next() and an abort handle?
|
|
break;
|
|
};
|
|
}
|
|
|
|
trace!(?subscription_id, "closed new heads subscription");
|
|
});
|
|
}
|
|
_ => return Err(anyhow::anyhow!("unimplemented")),
|
|
}
|
|
|
|
// TODO: do something with subscription_join_handle?
|
|
|
|
let response = JsonRpcForwardedResponse::from_value(json!(subscription_id), id);
|
|
|
|
// TODO: make a `SubscriptonHandle(AbortHandle, JoinHandle)` struct?
|
|
|
|
Ok((subscription_abort_handle, response))
|
|
}
|
|
|
|
/// send the request or batch of requests to the approriate RPCs
|
|
pub async fn proxy_web3_rpc(
|
|
self: &Arc<Self>,
|
|
authorized_request: Arc<AuthorizedRequest>,
|
|
request: JsonRpcRequestEnum,
|
|
) -> anyhow::Result<JsonRpcForwardedResponseEnum> {
|
|
// TODO: this should probably be trace level
|
|
trace!(?request, "proxy_web3_rpc");
|
|
|
|
// even though we have timeouts on the requests to our backend providers,
|
|
// we need a timeout for the incoming request so that retries don't run forever
|
|
// TODO: take this as an optional argument. per user max? expiration time instead of duration?
|
|
let max_time = Duration::from_secs(120);
|
|
|
|
let response = match request {
|
|
JsonRpcRequestEnum::Single(request) => JsonRpcForwardedResponseEnum::Single(
|
|
timeout(
|
|
max_time,
|
|
self.proxy_web3_rpc_request(authorized_request, request),
|
|
)
|
|
.await??,
|
|
),
|
|
JsonRpcRequestEnum::Batch(requests) => JsonRpcForwardedResponseEnum::Batch(
|
|
timeout(
|
|
max_time,
|
|
self.proxy_web3_rpc_requests(authorized_request, requests),
|
|
)
|
|
.await??,
|
|
),
|
|
};
|
|
|
|
// TODO: this should probably be trace level
|
|
trace!(?response, "Forwarding");
|
|
|
|
Ok(response)
|
|
}
|
|
|
|
/// cut up the request and send to potentually different servers
|
|
/// TODO: make sure this isn't a problem
|
|
async fn proxy_web3_rpc_requests(
|
|
self: &Arc<Self>,
|
|
authorized_request: Arc<AuthorizedRequest>,
|
|
requests: Vec<JsonRpcRequest>,
|
|
) -> anyhow::Result<Vec<JsonRpcForwardedResponse>> {
|
|
// TODO: we should probably change ethers-rs to support this directly
|
|
let num_requests = requests.len();
|
|
|
|
let responses = join_all(
|
|
requests
|
|
.into_iter()
|
|
.map(|request| {
|
|
let authorized_request = authorized_request.clone();
|
|
|
|
// TODO: spawn so the requests go in parallel
|
|
// TODO: i think we will need to flatten
|
|
self.proxy_web3_rpc_request(authorized_request, request)
|
|
})
|
|
.collect::<Vec<_>>(),
|
|
)
|
|
.await;
|
|
|
|
// TODO: i'm sure this could be done better with iterators
|
|
let mut collected: Vec<JsonRpcForwardedResponse> = Vec::with_capacity(num_requests);
|
|
for response in responses {
|
|
collected.push(response?);
|
|
}
|
|
|
|
Ok(collected)
|
|
}
|
|
|
|
pub fn db_conn(&self) -> Option<&DatabaseConnection> {
|
|
self.db_conn.as_ref()
|
|
}
|
|
|
|
pub async fn redis_conn(&self) -> anyhow::Result<redis_rate_limiter::RedisConnection> {
|
|
match self.vredis_pool.as_ref() {
|
|
None => Err(anyhow::anyhow!("no redis server configured")),
|
|
Some(redis_pool) => {
|
|
let redis_conn = redis_pool.get().await?;
|
|
|
|
Ok(redis_conn)
|
|
}
|
|
}
|
|
}
|
|
|
|
#[measure([ErrorCount, HitCount, ResponseTime, Throughput])]
|
|
async fn proxy_web3_rpc_request(
|
|
self: &Arc<Self>,
|
|
authorized_request: Arc<AuthorizedRequest>,
|
|
mut request: JsonRpcRequest,
|
|
) -> anyhow::Result<JsonRpcForwardedResponse> {
|
|
trace!("Received request: {:?}", request);
|
|
|
|
// TODO: allow customizing the period?
|
|
let request_metadata = Arc::new(RequestMetadata::new(60, &request)?);
|
|
|
|
// save the id so we can attach it to the response
|
|
// TODO: instead of cloning, take the id out
|
|
let request_id = request.id.clone();
|
|
|
|
// TODO: if eth_chainId or net_version, serve those without querying the backend
|
|
// TODO: don't clone?
|
|
let partial_response: serde_json::Value = match request.method.clone().as_ref() {
|
|
// lots of commands are blocked
|
|
method @ ("admin_addPeer"
|
|
| "admin_datadir"
|
|
| "admin_startRPC"
|
|
| "admin_startWS"
|
|
| "admin_stopRPC"
|
|
| "admin_stopWS"
|
|
| "db_getHex"
|
|
| "db_getString"
|
|
| "db_putHex"
|
|
| "db_putString"
|
|
| "debug_chaindbCompact"
|
|
| "debug_freezeClient"
|
|
| "debug_goTrace"
|
|
| "debug_mutexProfile"
|
|
| "debug_setBlockProfileRate"
|
|
| "debug_setGCPercent"
|
|
| "debug_setHead"
|
|
| "debug_setMutexProfileFraction"
|
|
| "debug_standardTraceBlockToFile"
|
|
| "debug_standardTraceBadBlockToFile"
|
|
| "debug_startCPUProfile"
|
|
| "debug_startGoTrace"
|
|
| "debug_stopCPUProfile"
|
|
| "debug_stopGoTrace"
|
|
| "debug_writeBlockProfile"
|
|
| "debug_writeMemProfile"
|
|
| "debug_writeMutexProfile"
|
|
| "eth_compileLLL"
|
|
| "eth_compileSerpent"
|
|
| "eth_compileSolidity"
|
|
| "eth_getCompilers"
|
|
| "eth_sendTransaction"
|
|
| "eth_sign"
|
|
| "eth_signTransaction"
|
|
| "eth_submitHashrate"
|
|
| "eth_submitWork"
|
|
| "les_addBalance"
|
|
| "les_setClientParams"
|
|
| "les_setDefaultParams"
|
|
| "miner_setExtra"
|
|
| "miner_setGasPrice"
|
|
| "miner_start"
|
|
| "miner_stop"
|
|
| "miner_setEtherbase"
|
|
| "miner_setGasLimit"
|
|
| "personal_importRawKey"
|
|
| "personal_listAccounts"
|
|
| "personal_lockAccount"
|
|
| "personal_newAccount"
|
|
| "personal_unlockAccount"
|
|
| "personal_sendTransaction"
|
|
| "personal_sign"
|
|
| "personal_ecRecover"
|
|
| "shh_addToGroup"
|
|
| "shh_getFilterChanges"
|
|
| "shh_getMessages"
|
|
| "shh_hasIdentity"
|
|
| "shh_newFilter"
|
|
| "shh_newGroup"
|
|
| "shh_newIdentity"
|
|
| "shh_post"
|
|
| "shh_uninstallFilter"
|
|
| "shh_version") => {
|
|
// TODO: client error stat
|
|
// TODO: proper error code
|
|
return Err(anyhow::anyhow!("method unsupported: {}", method));
|
|
}
|
|
// TODO: implement these commands
|
|
method @ ("eth_getFilterChanges"
|
|
| "eth_getFilterLogs"
|
|
| "eth_newBlockFilter"
|
|
| "eth_newFilter"
|
|
| "eth_newPendingTransactionFilter"
|
|
| "eth_uninstallFilter") => {
|
|
// TODO: unsupported command stat
|
|
return Err(anyhow::anyhow!("not yet implemented: {}", method));
|
|
}
|
|
// some commands can use local data or caches
|
|
"eth_accounts" => {
|
|
// no stats on this. its cheap
|
|
serde_json::Value::Array(vec![])
|
|
}
|
|
"eth_blockNumber" => {
|
|
match self.balanced_rpcs.head_block_num() {
|
|
Some(head_block_num) => {
|
|
json!(head_block_num)
|
|
}
|
|
None => {
|
|
// TODO: what does geth do if this happens?
|
|
return Err(anyhow::anyhow!(
|
|
"no servers synced. unknown eth_blockNumber"
|
|
));
|
|
}
|
|
}
|
|
}
|
|
// TODO: eth_callBundle (https://docs.flashbots.net/flashbots-auction/searchers/advanced/rpc-endpoint#eth_callbundle)
|
|
// TODO: eth_cancelPrivateTransaction (https://docs.flashbots.net/flashbots-auction/searchers/advanced/rpc-endpoint#eth_cancelprivatetransaction, but maybe just reject)
|
|
// TODO: eth_sendPrivateTransaction (https://docs.flashbots.net/flashbots-auction/searchers/advanced/rpc-endpoint#eth_sendprivatetransaction)
|
|
"eth_coinbase" => {
|
|
// no need for serving coinbase
|
|
// we could return a per-user payment address here, but then we might leak that to dapps
|
|
// no stats on this. its cheap
|
|
json!(Address::zero())
|
|
}
|
|
// TODO: eth_estimateGas using anvil?
|
|
// TODO: eth_gasPrice that does awesome magic to predict the future
|
|
"eth_hashrate" => {
|
|
// no stats on this. its cheap
|
|
json!(U64::zero())
|
|
}
|
|
"eth_mining" => {
|
|
// no stats on this. its cheap
|
|
json!(false)
|
|
}
|
|
// TODO: eth_sendBundle (flashbots command)
|
|
// broadcast transactions to all private rpcs at once
|
|
"eth_sendRawTransaction" => {
|
|
// emit stats
|
|
let rpcs = self.private_rpcs.as_ref().unwrap_or(&self.balanced_rpcs);
|
|
|
|
return rpcs
|
|
.try_send_all_upstream_servers(
|
|
Some(&authorized_request),
|
|
request,
|
|
Some(request_metadata),
|
|
None,
|
|
)
|
|
.await;
|
|
}
|
|
"eth_syncing" => {
|
|
// no stats on this. its cheap
|
|
// TODO: return a real response if all backends are syncing or if no servers in sync
|
|
json!(false)
|
|
}
|
|
"net_listening" => {
|
|
// no stats on this. its cheap
|
|
// TODO: only if there are some backends on balanced_rpcs?
|
|
json!(true)
|
|
}
|
|
"net_peerCount" => {
|
|
// emit stats
|
|
self.balanced_rpcs.num_synced_rpcs().into()
|
|
}
|
|
"web3_clientVersion" => {
|
|
// no stats on this. its cheap
|
|
serde_json::Value::String(APP_USER_AGENT.to_string())
|
|
}
|
|
"web3_sha3" => {
|
|
// emit stats
|
|
// returns Keccak-256 (not the standardized SHA3-256) of the given data.
|
|
match &request.params {
|
|
Some(serde_json::Value::Array(params)) => {
|
|
// TODO: make a struct and use serde conversion to clean this up
|
|
if params.len() != 1 || !params[0].is_string() {
|
|
// TODO: this needs the correct error code in the response
|
|
return Err(anyhow::anyhow!("invalid request"));
|
|
}
|
|
|
|
let param = Bytes::from_str(
|
|
params[0]
|
|
.as_str()
|
|
.context("parsing params 0 into str then bytes")?,
|
|
)?;
|
|
|
|
let hash = H256::from(keccak256(param));
|
|
|
|
json!(hash)
|
|
}
|
|
_ => {
|
|
// TODO: this needs the correct error code in the response
|
|
// TODO: emit stat?
|
|
return Err(anyhow::anyhow!("invalid request"));
|
|
}
|
|
}
|
|
}
|
|
// anything else gets sent to backend rpcs and cached
|
|
method => {
|
|
// emit stats
|
|
|
|
// TODO: wait for them to be synced?
|
|
let head_block_id = self
|
|
.balanced_rpcs
|
|
.head_block_id()
|
|
.context("no servers synced")?;
|
|
|
|
// we do this check before checking caches because it might modify the request params
|
|
// TODO: add a stat for archive vs full since they should probably cost different
|
|
let request_block_id = if let Some(request_block_needed) = block_needed(
|
|
method,
|
|
request.params.as_mut(),
|
|
head_block_id.num,
|
|
&self.balanced_rpcs,
|
|
)
|
|
.await?
|
|
{
|
|
// TODO: maybe this should be on the app and not on balanced_rpcs
|
|
let request_block_hash =
|
|
self.balanced_rpcs.block_hash(&request_block_needed).await?;
|
|
|
|
BlockId {
|
|
num: request_block_needed,
|
|
hash: request_block_hash,
|
|
}
|
|
} else {
|
|
head_block_id
|
|
};
|
|
|
|
// TODO: struct for this?
|
|
// TODO: this can be rather large. is that okay?
|
|
let cache_key = (
|
|
request_block_id.hash,
|
|
request.method.clone(),
|
|
request.params.clone().map(|x| x.to_string()),
|
|
);
|
|
|
|
let mut response = {
|
|
let request_metadata = request_metadata.clone();
|
|
|
|
let authorized_request = authorized_request.clone();
|
|
|
|
self.response_cache
|
|
.try_get_with(cache_key, async move {
|
|
// TODO: retry some failures automatically!
|
|
// TODO: try private_rpcs if all the balanced_rpcs fail!
|
|
// TODO: put the hash here instead?
|
|
let mut response = self
|
|
.balanced_rpcs
|
|
.try_send_best_upstream_server(
|
|
Some(&authorized_request),
|
|
request,
|
|
Some(&request_metadata),
|
|
Some(&request_block_id.num),
|
|
)
|
|
.await?;
|
|
|
|
// discard their id by replacing it with an empty
|
|
response.id = Default::default();
|
|
|
|
// TODO: only cache the inner response (or error)
|
|
Ok::<_, anyhow::Error>(response)
|
|
})
|
|
.await
|
|
// TODO: what is the best way to handle an Arc here?
|
|
.map_err(|err| {
|
|
// TODO: emit a stat for an error
|
|
anyhow::anyhow!(err)
|
|
})
|
|
.context("caching response")?
|
|
};
|
|
|
|
// since this data came likely out of a cache, the id is not going to match
|
|
// replace the id with our request's id.
|
|
response.id = request_id;
|
|
|
|
// DRY this up by just returning the partial result (or error) here
|
|
if let (Some(stat_sender), Ok(AuthorizedRequest::User(Some(_), authorized_key))) = (
|
|
self.stat_sender.as_ref(),
|
|
Arc::try_unwrap(authorized_request),
|
|
) {
|
|
let response_stat = ProxyResponseStat::new(
|
|
method.to_string(),
|
|
authorized_key,
|
|
request_metadata,
|
|
&response,
|
|
);
|
|
|
|
stat_sender.send_async(response_stat.into()).await?;
|
|
}
|
|
|
|
return Ok(response);
|
|
}
|
|
};
|
|
|
|
let response = JsonRpcForwardedResponse::from_value(partial_response, request_id);
|
|
|
|
if let (Some(stat_sender), Ok(AuthorizedRequest::User(Some(_), authorized_key))) = (
|
|
self.stat_sender.as_ref(),
|
|
Arc::try_unwrap(authorized_request),
|
|
) {
|
|
let response_stat =
|
|
ProxyResponseStat::new(request.method, authorized_key, request_metadata, &response);
|
|
|
|
stat_sender.send_async(response_stat.into()).await?;
|
|
}
|
|
|
|
Ok(response)
|
|
}
|
|
}
|
|
|
|
impl fmt::Debug for Web3ProxyApp {
|
|
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
|
|
// TODO: the default formatter takes forever to write. this is too quiet though
|
|
f.debug_struct("Web3ProxyApp").finish_non_exhaustive()
|
|
}
|
|
}
|