882 lines
35 KiB
Rust
882 lines
35 KiB
Rust
// TODO: this file is way too big now. move things into other modules
|
|
|
|
use crate::block_number::block_needed;
|
|
use crate::config::{AppConfig, TopConfig};
|
|
use crate::jsonrpc::JsonRpcForwardedResponse;
|
|
use crate::jsonrpc::JsonRpcForwardedResponseEnum;
|
|
use crate::jsonrpc::JsonRpcRequest;
|
|
use crate::jsonrpc::JsonRpcRequestEnum;
|
|
use crate::rpcs::blockchain::{ArcBlock, BlockHashesMap, BlockId};
|
|
use crate::rpcs::connections::Web3Connections;
|
|
use crate::rpcs::request::OpenRequestHandleMetrics;
|
|
use crate::rpcs::transactions::TxStatus;
|
|
use anyhow::Context;
|
|
use axum::extract::ws::Message;
|
|
use derive_more::From;
|
|
use ethers::core::utils::keccak256;
|
|
use ethers::prelude::{Address, Block, Bytes, TxHash, H256, U64};
|
|
use futures::future::Abortable;
|
|
use futures::future::{join_all, AbortHandle};
|
|
use futures::stream::FuturesUnordered;
|
|
use futures::stream::StreamExt;
|
|
use futures::Future;
|
|
use hashbrown::HashMap;
|
|
use metered::{metered, ErrorCount, HitCount, InFlight, ResponseTime, Throughput};
|
|
use migration::{Migrator, MigratorTrait};
|
|
use moka::future::Cache;
|
|
use redis_rate_limit::bb8::PooledConnection;
|
|
use redis_rate_limit::{
|
|
bb8::{self, ErrorSink},
|
|
RedisConnectionManager, RedisErrorSink, RedisPool, RedisRateLimit,
|
|
};
|
|
use sea_orm::DatabaseConnection;
|
|
use serde::Serialize;
|
|
use serde_json::json;
|
|
use std::fmt;
|
|
use std::pin::Pin;
|
|
use std::str::FromStr;
|
|
use std::sync::atomic::{self, AtomicUsize};
|
|
use std::sync::Arc;
|
|
use std::time::Duration;
|
|
use tokio::sync::{broadcast, watch};
|
|
use tokio::task::JoinHandle;
|
|
use tokio::time::{timeout, Instant};
|
|
use tokio_stream::wrappers::{BroadcastStream, WatchStream};
|
|
use tracing::{info, info_span, instrument, trace, warn, Instrument};
|
|
use uuid::Uuid;
|
|
|
|
// TODO: make this customizable?
|
|
static APP_USER_AGENT: &str = concat!(
|
|
"satoshiandkin/",
|
|
env!("CARGO_PKG_NAME"),
|
|
"/",
|
|
env!("CARGO_PKG_VERSION"),
|
|
);
|
|
|
|
/// block hash, method, params
|
|
// TODO: better name
|
|
type ResponseCacheKey = (H256, String, Option<String>);
|
|
type ResponseCache = Cache<ResponseCacheKey, JsonRpcForwardedResponse>;
|
|
|
|
pub type AnyhowJoinHandle<T> = JoinHandle<anyhow::Result<T>>;
|
|
|
|
#[derive(Clone, Copy, From)]
|
|
pub struct UserCacheValue {
|
|
pub expires_at: Instant,
|
|
pub user_id: u64,
|
|
pub user_count_per_period: u64,
|
|
}
|
|
|
|
/// The application
|
|
// TODO: this debug impl is way too verbose. make something smaller
|
|
// TODO: i'm sure this is more arcs than necessary, but spawning futures makes references hard
|
|
pub struct Web3ProxyApp {
|
|
/// Send requests to the best server available
|
|
pub balanced_rpcs: Arc<Web3Connections>,
|
|
/// Send private requests (like eth_sendRawTransaction) to all these servers
|
|
pub private_rpcs: Option<Arc<Web3Connections>>,
|
|
response_cache: ResponseCache,
|
|
// don't drop this or the sender will stop working
|
|
// TODO: broadcast channel instead?
|
|
head_block_receiver: watch::Receiver<ArcBlock>,
|
|
pending_tx_sender: broadcast::Sender<TxStatus>,
|
|
pub config: AppConfig,
|
|
pub db_conn: Option<sea_orm::DatabaseConnection>,
|
|
/// prometheus metrics
|
|
app_metrics: Arc<Web3ProxyAppMetrics>,
|
|
open_request_handle_metrics: Arc<OpenRequestHandleMetrics>,
|
|
/// store pending transactions that we've seen so that we don't send duplicates to subscribers
|
|
pub pending_transactions: Cache<TxHash, TxStatus>,
|
|
pub frontend_rate_limiter: Option<RedisRateLimit>,
|
|
pub redis_pool: Option<RedisPool>,
|
|
pub user_cache: Cache<Uuid, UserCacheValue>,
|
|
}
|
|
|
|
/// flatten a JoinError into an anyhow error
|
|
/// Useful when joining multiple futures.
|
|
pub async fn flatten_handle<T>(handle: AnyhowJoinHandle<T>) -> anyhow::Result<T> {
|
|
match handle.await {
|
|
Ok(Ok(result)) => Ok(result),
|
|
Ok(Err(err)) => Err(err),
|
|
Err(err) => Err(err.into()),
|
|
}
|
|
}
|
|
|
|
/// return the first error or okay if everything worked
|
|
pub async fn flatten_handles<T>(
|
|
mut handles: FuturesUnordered<AnyhowJoinHandle<T>>,
|
|
) -> anyhow::Result<()> {
|
|
while let Some(x) = handles.next().await {
|
|
match x {
|
|
Err(e) => return Err(e.into()),
|
|
Ok(Err(e)) => return Err(e),
|
|
Ok(Ok(_)) => continue,
|
|
}
|
|
}
|
|
|
|
Ok(())
|
|
}
|
|
|
|
/// Connect to the database and run migrations
|
|
#[instrument(skip_all)]
|
|
pub async fn get_migrated_db(
|
|
db_url: String,
|
|
min_connections: u32,
|
|
max_connections: u32,
|
|
) -> anyhow::Result<DatabaseConnection> {
|
|
// TODO: scrub credentials and then include the db_url in logs
|
|
info!("Connecting to db");
|
|
|
|
let mut db_opt = sea_orm::ConnectOptions::new(db_url);
|
|
|
|
// TODO: load all these options from the config file. i think mysql default max is 100
|
|
// TODO: sqlx logging only in debug. way too verbose for production
|
|
db_opt
|
|
.min_connections(min_connections)
|
|
.max_connections(max_connections)
|
|
.connect_timeout(Duration::from_secs(8))
|
|
.idle_timeout(Duration::from_secs(8))
|
|
.max_lifetime(Duration::from_secs(60))
|
|
.sqlx_logging(false);
|
|
// .sqlx_logging_level(log::LevelFilter::Info);
|
|
|
|
let db = sea_orm::Database::connect(db_opt).await?;
|
|
|
|
// TODO: if error, roll back?
|
|
Migrator::up(&db, None).await?;
|
|
|
|
Ok(db)
|
|
}
|
|
|
|
#[metered(registry = Web3ProxyAppMetrics, registry_expr = self.app_metrics, visibility = pub)]
|
|
impl Web3ProxyApp {
|
|
pub async fn spawn(
|
|
top_config: TopConfig,
|
|
num_workers: u32,
|
|
) -> anyhow::Result<(
|
|
Arc<Web3ProxyApp>,
|
|
Pin<Box<dyn Future<Output = anyhow::Result<()>>>>,
|
|
)> {
|
|
// safety checks on the config
|
|
assert!(
|
|
top_config.app.redirect_user_url.contains("{{user_id}}"),
|
|
"redirect user url must contain \"{{user_id}}\""
|
|
);
|
|
|
|
let app_metrics = Default::default();
|
|
let open_request_handle_metrics: Arc<OpenRequestHandleMetrics> = Default::default();
|
|
|
|
// first, we connect to mysql and make sure the latest migrations have run
|
|
let db_conn = if let Some(db_url) = &top_config.app.db_url {
|
|
let db_min_connections = top_config.app.db_min_connections.unwrap_or(num_workers);
|
|
|
|
// TODO: what default multiple?
|
|
let redis_max_connections = top_config
|
|
.app
|
|
.db_max_connections
|
|
.unwrap_or(db_min_connections * 2);
|
|
|
|
let db =
|
|
get_migrated_db(db_url.clone(), db_min_connections, redis_max_connections).await?;
|
|
|
|
Some(db)
|
|
} else {
|
|
info!("no database");
|
|
None
|
|
};
|
|
|
|
let balanced_rpcs = top_config.balanced_rpcs;
|
|
|
|
let private_rpcs = if let Some(private_rpcs) = top_config.private_rpcs {
|
|
private_rpcs
|
|
} else {
|
|
Default::default()
|
|
};
|
|
|
|
// TODO: try_join_all instead?
|
|
let handles = FuturesUnordered::new();
|
|
|
|
// make a http shared client
|
|
// TODO: can we configure the connection pool? should we?
|
|
// TODO: 5 minutes is probably long enough. unlimited is a bad idea if something is wrong with the remote server
|
|
let http_client = Some(
|
|
reqwest::ClientBuilder::new()
|
|
.connect_timeout(Duration::from_secs(5))
|
|
.timeout(Duration::from_secs(60))
|
|
.user_agent(APP_USER_AGENT)
|
|
.build()?,
|
|
);
|
|
|
|
let redis_pool = match top_config.app.redis_url.as_ref() {
|
|
Some(redis_url) => {
|
|
// TODO: scrub credentials and then include the redis_url in logs
|
|
info!("Connecting to redis");
|
|
|
|
let manager = RedisConnectionManager::new(redis_url.as_ref())?;
|
|
|
|
let redis_min_connections =
|
|
top_config.app.redis_min_connections.unwrap_or(num_workers);
|
|
|
|
let redis_max_connections = top_config
|
|
.app
|
|
.redis_max_connections
|
|
.unwrap_or(redis_min_connections * 2);
|
|
|
|
// TODO: min_idle?
|
|
// TODO: set max_size based on max expected concurrent connections? set based on num_workers?
|
|
let builder = bb8::Pool::builder()
|
|
.error_sink(RedisErrorSink.boxed_clone())
|
|
.min_idle(Some(redis_min_connections))
|
|
.max_size(redis_max_connections);
|
|
|
|
let pool = builder.build(manager).await?;
|
|
|
|
Some(pool)
|
|
}
|
|
None => {
|
|
warn!("no redis connection");
|
|
None
|
|
}
|
|
};
|
|
|
|
// TODO: i don't like doing Block::default here! Change this to "None"?
|
|
let (head_block_sender, head_block_receiver) = watch::channel(Arc::new(Block::default()));
|
|
// TODO: will one receiver lagging be okay? how big should this be?
|
|
let (pending_tx_sender, pending_tx_receiver) = broadcast::channel(256);
|
|
|
|
// TODO: use this? it could listen for confirmed transactions and then clear pending_transactions, but the head_block_sender is doing that
|
|
drop(pending_tx_receiver);
|
|
|
|
// TODO: sized and timed expiration!
|
|
// TODO: put some in Redis, too?
|
|
let pending_transactions = Cache::new(10000);
|
|
|
|
// TODO: don't drop the pending_tx_receiver. instead, read it to mark transactions as "seen". once seen, we won't re-send them
|
|
// TODO: once a transaction is "Confirmed" we remove it from the map. this should prevent major memory leaks.
|
|
// TODO: we should still have some sort of expiration or maximum size limit for the map
|
|
|
|
// this block map is shared between balanced_rpcs and private_rpcs.
|
|
// TODO: what limits should we have for expiration?
|
|
let block_map = BlockHashesMap::new(10_000);
|
|
|
|
let (balanced_rpcs, balanced_handle) = Web3Connections::spawn(
|
|
top_config.app.chain_id,
|
|
balanced_rpcs,
|
|
http_client.clone(),
|
|
redis_pool.clone(),
|
|
block_map.clone(),
|
|
Some(head_block_sender),
|
|
top_config.app.min_sum_soft_limit,
|
|
top_config.app.min_synced_rpcs,
|
|
Some(pending_tx_sender.clone()),
|
|
pending_transactions.clone(),
|
|
open_request_handle_metrics.clone(),
|
|
)
|
|
.await
|
|
.context("balanced rpcs")?;
|
|
|
|
handles.push(balanced_handle);
|
|
|
|
let private_rpcs = if private_rpcs.is_empty() {
|
|
// TODO: do None instead of clone?
|
|
warn!("No private relays configured. Any transactions will be broadcast to the public mempool!");
|
|
None
|
|
} else {
|
|
// TODO: attach context to this error
|
|
let (private_rpcs, private_handle) = Web3Connections::spawn(
|
|
top_config.app.chain_id,
|
|
private_rpcs,
|
|
http_client.clone(),
|
|
redis_pool.clone(),
|
|
block_map,
|
|
// subscribing to new heads here won't work well. if they are fast, they might be ahead of balanced_rpcs
|
|
None,
|
|
// minimum doesn't really matter on private rpcs
|
|
1,
|
|
1,
|
|
// TODO: subscribe to pending transactions on the private rpcs? they seem to have low rate limits
|
|
None,
|
|
pending_transactions.clone(),
|
|
open_request_handle_metrics.clone(),
|
|
)
|
|
.await
|
|
.context("private_rpcs")?;
|
|
|
|
handles.push(private_handle);
|
|
|
|
Some(private_rpcs)
|
|
};
|
|
|
|
let frontend_rate_limiter = redis_pool.as_ref().map(|redis_pool| {
|
|
RedisRateLimit::new(
|
|
redis_pool.clone(),
|
|
"web3_proxy",
|
|
"frontend",
|
|
top_config.app.public_rate_limit_per_minute,
|
|
60.0,
|
|
)
|
|
});
|
|
|
|
// TODO: change this to a sized cache
|
|
let response_cache = Cache::new(10_000);
|
|
let user_cache = Cache::new(10_000);
|
|
|
|
let app = Self {
|
|
config: top_config.app,
|
|
balanced_rpcs,
|
|
private_rpcs,
|
|
response_cache,
|
|
head_block_receiver,
|
|
pending_tx_sender,
|
|
pending_transactions,
|
|
frontend_rate_limiter,
|
|
db_conn,
|
|
redis_pool,
|
|
app_metrics,
|
|
open_request_handle_metrics,
|
|
user_cache,
|
|
};
|
|
|
|
let app = Arc::new(app);
|
|
|
|
let handle = Box::pin(flatten_handles(handles));
|
|
|
|
Ok((app, handle))
|
|
}
|
|
|
|
pub fn prometheus_metrics(&self) -> String {
|
|
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")
|
|
}
|
|
|
|
#[instrument(skip_all)]
|
|
#[measure([ErrorCount, HitCount, InFlight, ResponseTime, Throughput])]
|
|
pub async fn eth_subscribe<'a>(
|
|
self: &'a Arc<Self>,
|
|
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).unwrap());
|
|
|
|
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).unwrap());
|
|
|
|
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).unwrap());
|
|
|
|
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
|
|
#[instrument(skip_all)]
|
|
pub async fn proxy_web3_rpc(
|
|
self: &Arc<Self>,
|
|
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(request)).await??,
|
|
),
|
|
JsonRpcRequestEnum::Batch(requests) => JsonRpcForwardedResponseEnum::Batch(
|
|
timeout(max_time, self.proxy_web3_rpc_requests(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
|
|
#[instrument(skip_all)]
|
|
async fn proxy_web3_rpc_requests(
|
|
self: &Arc<Self>,
|
|
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| self.proxy_web3_rpc_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)
|
|
}
|
|
|
|
#[instrument(skip_all)]
|
|
pub async fn redis_conn(&self) -> anyhow::Result<PooledConnection<RedisConnectionManager>> {
|
|
match self.redis_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, InFlight, ResponseTime, Throughput])]
|
|
#[instrument(skip_all)]
|
|
async fn proxy_web3_rpc_request(
|
|
self: &Arc<Self>,
|
|
mut request: JsonRpcRequest,
|
|
) -> anyhow::Result<JsonRpcForwardedResponse> {
|
|
trace!("Received request: {:?}", request);
|
|
|
|
// save the id so we can attach it to the response
|
|
let request_id = request.id.clone();
|
|
|
|
// TODO: if eth_chainId or net_version, serve those without querying the backend
|
|
|
|
// TODO: how much should we retry? probably with a timeout and not with a count like this
|
|
// TODO: think more about this loop.
|
|
// TODO: add things to this span
|
|
let span = info_span!("rpc_request");
|
|
// let _enter = span.enter(); // DO NOT ENTER! we can't use enter across awaits! (clippy lint soon)
|
|
|
|
// 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(request, None)
|
|
.instrument(span)
|
|
.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().unwrap())?;
|
|
|
|
let hash = H256::from(keccak256(param));
|
|
|
|
json!(hash)
|
|
}
|
|
_ => {
|
|
// TODO: this needs the correct error code in the response
|
|
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)
|
|
{
|
|
// 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()),
|
|
);
|
|
|
|
// TODO: move this caching outside this match and cache some of the other responses?
|
|
// TODO: cache the warp::reply to save us serializing every time?
|
|
let mut response = 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!
|
|
self.balanced_rpcs
|
|
.try_send_best_upstream_server(request, Some(&request_block_id.num))
|
|
.await
|
|
})
|
|
.await
|
|
.unwrap();
|
|
|
|
// since this data came out of a cache, the id is likely wrong.
|
|
// replace the id with our request's id.
|
|
response.id = request_id;
|
|
|
|
return Ok(response);
|
|
}
|
|
};
|
|
|
|
let response = JsonRpcForwardedResponse::from_value(partial_response, request_id);
|
|
|
|
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()
|
|
}
|
|
}
|