1324 lines
47 KiB
Rust
1324 lines
47 KiB
Rust
//! Utilities for authorization of logged in and anonymous users.
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use super::errors::{Web3ProxyError, Web3ProxyErrorContext, Web3ProxyResult};
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use super::rpc_proxy_ws::ProxyMode;
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use crate::app::{AuthorizationChecks, Web3ProxyApp, APP_USER_AGENT};
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use crate::jsonrpc::{JsonRpcForwardedResponse, JsonRpcRequest};
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use crate::rpcs::one::Web3Rpc;
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use crate::stats::{AppStat, BackendRequests, RpcQueryStats};
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use crate::user_token::UserBearerToken;
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use axum::headers::authorization::Bearer;
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use axum::headers::{Header, Origin, Referer, UserAgent};
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use chrono::Utc;
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use core::fmt;
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use deferred_rate_limiter::DeferredRateLimitResult;
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use derive_more::From;
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use entities::sea_orm_active_enums::TrackingLevel;
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use entities::{balance, login, rpc_key, user, user_tier};
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use ethers::types::{Bytes, U64};
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use ethers::utils::keccak256;
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use futures::TryFutureExt;
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use hashbrown::HashMap;
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use http::HeaderValue;
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use ipnet::IpNet;
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use log::{error, trace, warn};
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use migration::sea_orm::{ColumnTrait, DatabaseConnection, EntityTrait, QueryFilter};
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use rdkafka::message::{Header as KafkaHeader, OwnedHeaders as KafkaOwnedHeaders, OwnedMessage};
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use rdkafka::producer::{FutureProducer, FutureRecord};
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use rdkafka::util::Timeout as KafkaTimeout;
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use redis_rate_limiter::redis::AsyncCommands;
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use redis_rate_limiter::RedisRateLimitResult;
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use std::convert::Infallible;
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use std::fmt::Display;
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use std::hash::{Hash, Hasher};
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use std::mem;
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use std::sync::atomic::{self, AtomicBool, AtomicI64, AtomicU64, AtomicUsize};
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use std::time::Duration;
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use std::{net::IpAddr, str::FromStr, sync::Arc};
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use tokio::sync::{OwnedSemaphorePermit, Semaphore};
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use tokio::task::JoinHandle;
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use tokio::time::Instant;
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use ulid::Ulid;
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use uuid::Uuid;
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/// This lets us use UUID and ULID while we transition to only ULIDs
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#[derive(Copy, Clone, Debug, Eq, PartialEq, serde::Deserialize, serde::Serialize)]
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pub enum RpcSecretKey {
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Ulid(Ulid),
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Uuid(Uuid),
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}
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/// TODO: should this have IpAddr and Origin or AuthorizationChecks?
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#[derive(Debug)]
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pub enum RateLimitResult {
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Allowed(Authorization, Option<OwnedSemaphorePermit>),
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RateLimited(
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Authorization,
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/// when their rate limit resets and they can try more requests
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Option<Instant>,
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),
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/// This key is not in our database. Deny access!
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UnknownKey,
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}
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#[derive(Clone, Debug)]
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pub enum AuthorizationType {
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Internal,
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Frontend,
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}
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/// TODO: include the authorization checks in this?
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#[derive(Clone, Debug)]
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pub struct Authorization {
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pub checks: AuthorizationChecks,
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// TODO: instead of the conn, have a channel?
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pub db_conn: Option<DatabaseConnection>,
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pub ip: IpAddr,
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pub origin: Option<Origin>,
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pub referer: Option<Referer>,
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pub user_agent: Option<UserAgent>,
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pub authorization_type: AuthorizationType,
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}
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pub struct KafkaDebugLogger {
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topic: String,
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key: Vec<u8>,
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headers: KafkaOwnedHeaders,
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producer: FutureProducer,
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num_requests: AtomicUsize,
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num_responses: AtomicUsize,
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}
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impl Hash for RpcSecretKey {
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fn hash<H: Hasher>(&self, state: &mut H) {
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let x = match self {
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Self::Ulid(x) => x.0,
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Self::Uuid(x) => x.as_u128(),
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};
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x.hash(state);
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}
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}
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impl fmt::Debug for KafkaDebugLogger {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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f.debug_struct("KafkaDebugLogger")
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.field("topic", &self.topic)
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.finish_non_exhaustive()
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}
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}
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type KafkaLogResult = Result<(i32, i64), (rdkafka::error::KafkaError, OwnedMessage)>;
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impl KafkaDebugLogger {
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fn try_new(
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app: &Web3ProxyApp,
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authorization: Arc<Authorization>,
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head_block_num: Option<&U64>,
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kafka_topic: &str,
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request_ulid: Ulid,
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) -> Option<Arc<Self>> {
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let kafka_producer = app.kafka_producer.clone()?;
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let kafka_topic = kafka_topic.to_string();
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let rpc_secret_key_id = authorization
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.checks
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.rpc_secret_key_id
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.map(|x| x.get())
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.unwrap_or_default();
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let kafka_key =
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rmp_serde::to_vec(&rpc_secret_key_id).expect("ids should always serialize with rmp");
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let chain_id = app.config.chain_id;
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let head_block_num = head_block_num
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.copied()
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.or_else(|| app.balanced_rpcs.head_block_num());
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// TODO: would be nice to have the block hash too
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// another item is added with the response, so initial_capacity is +1 what is needed here
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let kafka_headers = KafkaOwnedHeaders::new_with_capacity(6)
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.insert(KafkaHeader {
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key: "rpc_secret_key_id",
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value: authorization
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.checks
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.rpc_secret_key_id
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.map(|x| x.to_string())
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.as_ref(),
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})
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.insert(KafkaHeader {
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key: "ip",
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value: Some(&authorization.ip.to_string()),
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})
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.insert(KafkaHeader {
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key: "request_ulid",
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value: Some(&request_ulid.to_string()),
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})
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.insert(KafkaHeader {
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key: "head_block_num",
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value: head_block_num.map(|x| x.to_string()).as_ref(),
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})
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.insert(KafkaHeader {
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key: "chain_id",
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value: Some(&chain_id.to_le_bytes()),
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});
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// save the key and headers for when we log the response
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let x = Self {
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topic: kafka_topic,
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key: kafka_key,
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headers: kafka_headers,
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producer: kafka_producer,
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num_requests: 0.into(),
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num_responses: 0.into(),
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};
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let x = Arc::new(x);
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Some(x)
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}
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fn background_log(&self, payload: Vec<u8>) -> JoinHandle<KafkaLogResult> {
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let topic = self.topic.clone();
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let key = self.key.clone();
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let producer = self.producer.clone();
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let headers = self.headers.clone();
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let f = async move {
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let record = FutureRecord::to(&topic)
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.key(&key)
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.payload(&payload)
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.headers(headers);
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let produce_future =
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producer.send(record, KafkaTimeout::After(Duration::from_secs(5 * 60)));
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let kafka_response = produce_future.await;
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if let Err((err, msg)) = kafka_response.as_ref() {
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error!("produce kafka request: {} - {:?}", err, msg);
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// TODO: re-queue the msg? log somewhere else like a file on disk?
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// TODO: this is bad and should probably trigger an alarm
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};
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kafka_response
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};
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tokio::spawn(f)
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}
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/// for opt-in debug usage, log the request to kafka
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/// TODO: generic type for request
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pub fn log_debug_request(&self, request: &JsonRpcRequest) -> JoinHandle<KafkaLogResult> {
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// TODO: is rust message pack a good choice? try rkyv instead
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let payload =
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rmp_serde::to_vec(&request).expect("requests should always serialize with rmp");
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self.num_requests.fetch_add(1, atomic::Ordering::AcqRel);
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self.background_log(payload)
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}
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pub fn log_debug_response<R>(&self, response: &R) -> JoinHandle<KafkaLogResult>
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where
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R: serde::Serialize,
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{
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let payload =
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rmp_serde::to_vec(&response).expect("requests should always serialize with rmp");
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self.num_responses.fetch_add(1, atomic::Ordering::AcqRel);
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self.background_log(payload)
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}
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}
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#[derive(Debug)]
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pub struct RequestMetadata {
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/// TODO: set archive_request during the new instead of after
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/// TODO: this is more complex than "requires a block older than X height". different types of data can be pruned differently
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pub archive_request: AtomicBool,
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pub authorization: Option<Arc<Authorization>>,
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pub request_ulid: Ulid,
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/// Size of the JSON request. Does not include headers or things like that.
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pub request_bytes: usize,
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/// users can opt out of method tracking for their personal dashboads
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/// but we still have to store the method at least temporarily for cost calculations
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pub method: Option<String>,
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/// Instant that the request was received (or at least close to it)
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/// We use Instant and not timestamps to avoid problems with leap seconds and similar issues
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pub start_instant: tokio::time::Instant,
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/// if this is empty, there was a cache_hit
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/// otherwise, it is populated with any rpc servers that were used by this request
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pub backend_requests: BackendRequests,
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/// The number of times the request got stuck waiting because no servers were synced
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pub no_servers: AtomicU64,
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/// If handling the request hit an application error
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/// This does not count things like a transcation reverting or a malformed request
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pub error_response: AtomicBool,
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/// Size in bytes of the JSON response. Does not include headers or things like that.
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pub response_bytes: AtomicU64,
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/// How many milliseconds it took to respond to the request
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pub response_millis: AtomicU64,
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/// What time the (first) response was proxied.
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/// TODO: think about how to store response times for ProxyMode::Versus
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pub response_timestamp: AtomicI64,
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/// True if the response required querying a backup RPC
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/// RPC aggregators that query multiple providers to compare response may use this header to ignore our response.
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pub response_from_backup_rpc: AtomicBool,
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/// ProxyMode::Debug logs requests and responses with Kafka
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/// TODO: maybe this shouldn't be determined by ProxyMode. A request param should probably enable this
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pub kafka_debug_logger: Option<Arc<KafkaDebugLogger>>,
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/// Cancel-safe channel for sending stats to the buffer
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pub stat_sender: Option<flume::Sender<AppStat>>,
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}
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impl Default for RequestMetadata {
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fn default() -> Self {
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Self {
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archive_request: Default::default(),
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authorization: Default::default(),
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backend_requests: Default::default(),
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error_response: Default::default(),
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kafka_debug_logger: Default::default(),
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method: Default::default(),
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no_servers: Default::default(),
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request_bytes: Default::default(),
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request_ulid: Default::default(),
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response_bytes: Default::default(),
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response_from_backup_rpc: Default::default(),
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response_millis: Default::default(),
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response_timestamp: Default::default(),
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start_instant: Instant::now(),
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stat_sender: Default::default(),
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}
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}
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}
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#[derive(From)]
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pub enum RequestOrMethod<'a> {
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Request(&'a JsonRpcRequest),
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/// jsonrpc method (or similar label) and the size that the request should count as (sometimes 0)
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Method(&'a str, usize),
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RequestSize(usize),
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}
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impl<'a> RequestOrMethod<'a> {
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fn method(&self) -> Option<&str> {
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match self {
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Self::Request(x) => Some(&x.method),
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Self::Method(x, _) => Some(x),
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_ => None,
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}
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}
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fn jsonrpc_request(&self) -> Option<&JsonRpcRequest> {
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match self {
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Self::Request(x) => Some(x),
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_ => None,
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}
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}
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fn num_bytes(&self) -> usize {
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match self {
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RequestOrMethod::Method(_, num_bytes) => *num_bytes,
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RequestOrMethod::Request(x) => x.num_bytes(),
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RequestOrMethod::RequestSize(num_bytes) => *num_bytes,
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}
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}
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}
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impl<'a> From<&'a str> for RequestOrMethod<'a> {
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fn from(value: &'a str) -> Self {
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if value.is_empty() {
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Self::RequestSize(0)
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} else {
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Self::Method(value, 0)
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}
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}
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}
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// TODO: i think a trait is actually the right thing to use here
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#[derive(From)]
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pub enum ResponseOrBytes<'a> {
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Json(&'a serde_json::Value),
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Response(&'a JsonRpcForwardedResponse),
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Bytes(usize),
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}
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impl<'a> From<u64> for ResponseOrBytes<'a> {
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fn from(value: u64) -> Self {
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Self::Bytes(value as usize)
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}
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}
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impl ResponseOrBytes<'_> {
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pub fn num_bytes(&self) -> usize {
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match self {
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Self::Json(x) => serde_json::to_string(x)
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.expect("this should always serialize")
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.len(),
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Self::Response(x) => serde_json::to_string(x)
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.expect("this should always serialize")
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.len(),
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Self::Bytes(num_bytes) => *num_bytes,
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}
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}
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}
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impl RequestMetadata {
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pub async fn new<'a, R: Into<RequestOrMethod<'a>>>(
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app: &Web3ProxyApp,
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authorization: Arc<Authorization>,
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request: R,
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head_block_num: Option<&U64>,
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) -> Arc<Self> {
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let request = request.into();
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let method = request.method().map(|x| x.to_string());
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let request_bytes = request.num_bytes();
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// TODO: modify the request here? I don't really like that very much. but its a sure way to get archive_request set correctly
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// TODO: add the Ulid at the haproxy or amazon load balancer level? investigate OpenTelemetry
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let request_ulid = Ulid::new();
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let kafka_debug_logger = if matches!(authorization.checks.proxy_mode, ProxyMode::Debug) {
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KafkaDebugLogger::try_new(
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app,
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authorization.clone(),
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head_block_num,
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"web3_proxy:rpc",
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request_ulid,
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)
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} else {
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None
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};
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if let Some(ref kafka_debug_logger) = kafka_debug_logger {
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if let Some(request) = request.jsonrpc_request() {
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// TODO: channels might be more ergonomic than spawned futures
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// spawned things run in parallel easier but generally need more Arcs
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kafka_debug_logger.log_debug_request(request);
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} else {
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// there probably isn't a new request attached to this metadata.
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// this happens with websocket subscriptions
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}
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}
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let x = Self {
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archive_request: false.into(),
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backend_requests: Default::default(),
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error_response: false.into(),
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kafka_debug_logger,
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no_servers: 0.into(),
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authorization: Some(authorization),
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request_bytes,
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method,
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response_bytes: 0.into(),
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response_from_backup_rpc: false.into(),
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response_millis: 0.into(),
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request_ulid,
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response_timestamp: 0.into(),
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start_instant: Instant::now(),
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stat_sender: app.stat_sender.clone(),
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};
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Arc::new(x)
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}
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|
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pub fn backend_rpcs_used(&self) -> Vec<Arc<Web3Rpc>> {
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self.backend_requests.lock().clone()
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}
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|
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pub fn tracking_level(&self) -> TrackingLevel {
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if let Some(authorization) = self.authorization.as_ref() {
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authorization.checks.tracking_level.clone()
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} else {
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TrackingLevel::None
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}
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}
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|
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pub fn opt_in_method(&self) -> Option<String> {
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match self.tracking_level() {
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TrackingLevel::None | TrackingLevel::Aggregated => None,
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TrackingLevel::Detailed => self.method.clone(),
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}
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}
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|
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pub fn take_opt_in_method(&mut self) -> Option<String> {
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match self.tracking_level() {
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TrackingLevel::None | TrackingLevel::Aggregated => None,
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TrackingLevel::Detailed => self.method.take(),
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}
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}
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|
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pub fn try_send_stat(mut self) -> Web3ProxyResult<Option<Self>> {
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if let Some(stat_sender) = self.stat_sender.take() {
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trace!("sending stat! {:?}", self);
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let stat: RpcQueryStats = self.try_into()?;
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|
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let stat: AppStat = stat.into();
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|
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if let Err(err) = stat_sender.send(stat) {
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error!("failed sending stat {:?}: {:?}", err.0, err);
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// TODO: return it? that seems like it might cause an infinite loop
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// TODO: but dropping stats is bad... hmm... i guess better to undercharge customers than overcharge
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};
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|
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Ok(None)
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} else {
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Ok(Some(self))
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}
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}
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|
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pub fn add_response<'a, R: Into<ResponseOrBytes<'a>>>(&'a self, response: R) {
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// TODO: fetch? set? should it be None in a Mutex? or a OnceCell?
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let response = response.into();
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let num_bytes = response.num_bytes() as u64;
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|
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self.response_bytes
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.fetch_add(num_bytes, atomic::Ordering::AcqRel);
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|
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self.response_millis.fetch_add(
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self.start_instant.elapsed().as_millis() as u64,
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atomic::Ordering::AcqRel,
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);
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|
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// TODO: record first or last timestamp? really, we need multiple
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self.response_timestamp
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.store(Utc::now().timestamp(), atomic::Ordering::Release);
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|
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if let Some(kafka_debug_logger) = self.kafka_debug_logger.as_ref() {
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if let ResponseOrBytes::Response(response) = response {
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kafka_debug_logger.log_debug_response(response);
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}
|
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}
|
|
}
|
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|
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pub fn try_send_arc_stat(self: Arc<Self>) -> anyhow::Result<Option<Arc<Self>>> {
|
|
match Arc::try_unwrap(self) {
|
|
Ok(x) => {
|
|
let not_sent = x.try_send_stat()?.map(Arc::new);
|
|
Ok(not_sent)
|
|
}
|
|
Err(not_sent) => {
|
|
trace!(
|
|
"could not send stat while {} arcs are active",
|
|
Arc::strong_count(¬_sent)
|
|
);
|
|
Ok(Some(not_sent))
|
|
}
|
|
}
|
|
}
|
|
|
|
// TODO: helper function to duplicate? needs to clear request_bytes, and all the atomics tho...
|
|
}
|
|
|
|
// TODO: is this where the panic comes from?
|
|
impl Drop for RequestMetadata {
|
|
fn drop(&mut self) {
|
|
if self.stat_sender.is_some() {
|
|
// turn `&mut self` into `self`
|
|
let x = mem::take(self);
|
|
|
|
// warn!("request metadata dropped without stat send! {:?}", self);
|
|
let _ = x.try_send_stat();
|
|
}
|
|
}
|
|
}
|
|
|
|
impl RpcSecretKey {
|
|
pub fn new() -> Self {
|
|
Ulid::new().into()
|
|
}
|
|
}
|
|
|
|
impl Default for RpcSecretKey {
|
|
fn default() -> Self {
|
|
Self::new()
|
|
}
|
|
}
|
|
|
|
impl Display for RpcSecretKey {
|
|
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
|
|
// TODO: do this without dereferencing
|
|
let ulid: Ulid = (*self).into();
|
|
|
|
ulid.fmt(f)
|
|
}
|
|
}
|
|
|
|
impl FromStr for RpcSecretKey {
|
|
type Err = Web3ProxyError;
|
|
|
|
fn from_str(s: &str) -> Result<Self, Self::Err> {
|
|
if let Ok(ulid) = s.parse::<Ulid>() {
|
|
Ok(ulid.into())
|
|
} else if let Ok(uuid) = s.parse::<Uuid>() {
|
|
Ok(uuid.into())
|
|
} else {
|
|
// TODO: custom error type so that this shows as a 400
|
|
Err(Web3ProxyError::InvalidUserKey)
|
|
}
|
|
}
|
|
}
|
|
|
|
impl From<Ulid> for RpcSecretKey {
|
|
fn from(x: Ulid) -> Self {
|
|
RpcSecretKey::Ulid(x)
|
|
}
|
|
}
|
|
|
|
impl From<Uuid> for RpcSecretKey {
|
|
fn from(x: Uuid) -> Self {
|
|
RpcSecretKey::Uuid(x)
|
|
}
|
|
}
|
|
|
|
impl From<RpcSecretKey> for Ulid {
|
|
fn from(x: RpcSecretKey) -> Self {
|
|
match x {
|
|
RpcSecretKey::Ulid(x) => x,
|
|
RpcSecretKey::Uuid(x) => Ulid::from(x.as_u128()),
|
|
}
|
|
}
|
|
}
|
|
|
|
impl From<RpcSecretKey> for Uuid {
|
|
fn from(x: RpcSecretKey) -> Self {
|
|
match x {
|
|
RpcSecretKey::Ulid(x) => Uuid::from_u128(x.0),
|
|
RpcSecretKey::Uuid(x) => x,
|
|
}
|
|
}
|
|
}
|
|
|
|
impl Authorization {
|
|
pub fn internal(db_conn: Option<DatabaseConnection>) -> Web3ProxyResult<Self> {
|
|
let authorization_checks = AuthorizationChecks {
|
|
// any error logs on a local (internal) query are likely problems. log them all
|
|
log_revert_chance: 1.0,
|
|
tracking_level: TrackingLevel::Detailed,
|
|
// default for everything else should be fine. we don't have a user_id or ip to give
|
|
..Default::default()
|
|
};
|
|
|
|
let ip: IpAddr = "127.0.0.1".parse().expect("localhost should always parse");
|
|
let user_agent = UserAgent::from_str(APP_USER_AGENT).ok();
|
|
|
|
Self::try_new(
|
|
authorization_checks,
|
|
db_conn,
|
|
ip,
|
|
None,
|
|
None,
|
|
user_agent,
|
|
AuthorizationType::Internal,
|
|
)
|
|
}
|
|
|
|
pub fn external(
|
|
allowed_origin_requests_per_period: &HashMap<String, u64>,
|
|
db_conn: Option<DatabaseConnection>,
|
|
ip: IpAddr,
|
|
origin: Option<Origin>,
|
|
proxy_mode: ProxyMode,
|
|
referer: Option<Referer>,
|
|
user_agent: Option<UserAgent>,
|
|
) -> Web3ProxyResult<Self> {
|
|
// some origins can override max_requests_per_period for anon users
|
|
let max_requests_per_period = origin
|
|
.as_ref()
|
|
.map(|origin| {
|
|
allowed_origin_requests_per_period
|
|
.get(&origin.to_string())
|
|
.cloned()
|
|
})
|
|
.unwrap_or_default();
|
|
|
|
let authorization_checks = AuthorizationChecks {
|
|
max_requests_per_period,
|
|
proxy_mode,
|
|
tracking_level: TrackingLevel::Detailed,
|
|
..Default::default()
|
|
};
|
|
|
|
Self::try_new(
|
|
authorization_checks,
|
|
db_conn,
|
|
ip,
|
|
origin,
|
|
referer,
|
|
user_agent,
|
|
AuthorizationType::Frontend,
|
|
)
|
|
}
|
|
|
|
#[allow(clippy::too_many_arguments)]
|
|
pub fn try_new(
|
|
authorization_checks: AuthorizationChecks,
|
|
db_conn: Option<DatabaseConnection>,
|
|
ip: IpAddr,
|
|
origin: Option<Origin>,
|
|
referer: Option<Referer>,
|
|
user_agent: Option<UserAgent>,
|
|
authorization_type: AuthorizationType,
|
|
) -> Web3ProxyResult<Self> {
|
|
// check ip
|
|
match &authorization_checks.allowed_ips {
|
|
None => {}
|
|
Some(allowed_ips) => {
|
|
if !allowed_ips.iter().any(|x| x.contains(&ip)) {
|
|
return Err(Web3ProxyError::IpNotAllowed(ip));
|
|
}
|
|
}
|
|
}
|
|
|
|
// check origin
|
|
match (&origin, &authorization_checks.allowed_origins) {
|
|
(None, None) => {}
|
|
(Some(_), None) => {}
|
|
(None, Some(_)) => return Err(Web3ProxyError::OriginRequired),
|
|
(Some(origin), Some(allowed_origins)) => {
|
|
if !allowed_origins.contains(origin) {
|
|
return Err(Web3ProxyError::OriginNotAllowed(origin.clone()));
|
|
}
|
|
}
|
|
}
|
|
|
|
// check referer
|
|
match (&referer, &authorization_checks.allowed_referers) {
|
|
(None, None) => {}
|
|
(Some(_), None) => {}
|
|
(None, Some(_)) => return Err(Web3ProxyError::RefererRequired),
|
|
(Some(referer), Some(allowed_referers)) => {
|
|
if !allowed_referers.contains(referer) {
|
|
return Err(Web3ProxyError::RefererNotAllowed(referer.clone()));
|
|
}
|
|
}
|
|
}
|
|
|
|
// check user_agent
|
|
match (&user_agent, &authorization_checks.allowed_user_agents) {
|
|
(None, None) => {}
|
|
(Some(_), None) => {}
|
|
(None, Some(_)) => return Err(Web3ProxyError::UserAgentRequired),
|
|
(Some(user_agent), Some(allowed_user_agents)) => {
|
|
if !allowed_user_agents.contains(user_agent) {
|
|
return Err(Web3ProxyError::UserAgentNotAllowed(user_agent.clone()));
|
|
}
|
|
}
|
|
}
|
|
|
|
Ok(Self {
|
|
checks: authorization_checks,
|
|
db_conn,
|
|
ip,
|
|
origin,
|
|
referer,
|
|
user_agent,
|
|
authorization_type,
|
|
})
|
|
}
|
|
}
|
|
|
|
/// rate limit logins only by ip.
|
|
/// we want all origins and referers and user agents to count together
|
|
pub async fn login_is_authorized(app: &Web3ProxyApp, ip: IpAddr) -> Web3ProxyResult<Authorization> {
|
|
let authorization = match app.rate_limit_login(ip, ProxyMode::Best).await? {
|
|
RateLimitResult::Allowed(authorization, None) => authorization,
|
|
RateLimitResult::RateLimited(authorization, retry_at) => {
|
|
return Err(Web3ProxyError::RateLimited(authorization, retry_at));
|
|
}
|
|
// TODO: don't panic. give the user an error
|
|
x => unimplemented!("rate_limit_login shouldn't ever see these: {:?}", x),
|
|
};
|
|
|
|
Ok(authorization)
|
|
}
|
|
|
|
/// semaphore won't ever be None, but its easier if key auth and ip auth work the same way
|
|
pub async fn ip_is_authorized(
|
|
app: &Arc<Web3ProxyApp>,
|
|
ip: IpAddr,
|
|
origin: Option<Origin>,
|
|
proxy_mode: ProxyMode,
|
|
) -> Web3ProxyResult<(Authorization, Option<OwnedSemaphorePermit>)> {
|
|
// TODO: i think we could write an `impl From` for this
|
|
// TODO: move this to an AuthorizedUser extrator
|
|
let (authorization, semaphore) = match app
|
|
.rate_limit_by_ip(
|
|
&app.config.allowed_origin_requests_per_period,
|
|
ip,
|
|
origin,
|
|
proxy_mode,
|
|
)
|
|
.await?
|
|
{
|
|
RateLimitResult::Allowed(authorization, semaphore) => (authorization, semaphore),
|
|
RateLimitResult::RateLimited(authorization, retry_at) => {
|
|
// TODO: in the background, emit a stat (maybe simplest to use a channel?)
|
|
return Err(Web3ProxyError::RateLimited(authorization, retry_at));
|
|
}
|
|
// TODO: don't panic. give the user an error
|
|
x => unimplemented!("rate_limit_by_ip shouldn't ever see these: {:?}", x),
|
|
};
|
|
|
|
// in the background, add the ip to a recent_users map
|
|
if app.config.public_recent_ips_salt.is_some() {
|
|
let app = app.clone();
|
|
let f = async move {
|
|
let now = Utc::now().timestamp();
|
|
|
|
if let Some(mut redis_conn) = app.redis_conn().await? {
|
|
let salt = app
|
|
.config
|
|
.public_recent_ips_salt
|
|
.as_ref()
|
|
.expect("public_recent_ips_salt must exist in here");
|
|
|
|
let salted_ip = format!("{}:{}", salt, ip);
|
|
|
|
let hashed_ip = Bytes::from(keccak256(salted_ip.as_bytes()));
|
|
|
|
let recent_ip_key = format!("recent_users:ip:{}", app.config.chain_id);
|
|
|
|
redis_conn
|
|
.zadd(recent_ip_key, hashed_ip.to_string(), now)
|
|
.await?;
|
|
};
|
|
|
|
Ok::<_, Web3ProxyError>(())
|
|
}
|
|
.map_err(|err| {
|
|
warn!("background update of recent_users:ip failed: {}", err);
|
|
|
|
err
|
|
});
|
|
|
|
tokio::spawn(f);
|
|
}
|
|
|
|
Ok((authorization, semaphore))
|
|
}
|
|
|
|
/// like app.rate_limit_by_rpc_key but converts to a Web3ProxyError;
|
|
pub async fn key_is_authorized(
|
|
app: &Arc<Web3ProxyApp>,
|
|
rpc_key: RpcSecretKey,
|
|
ip: IpAddr,
|
|
origin: Option<Origin>,
|
|
proxy_mode: ProxyMode,
|
|
referer: Option<Referer>,
|
|
user_agent: Option<UserAgent>,
|
|
) -> Web3ProxyResult<(Authorization, Option<OwnedSemaphorePermit>)> {
|
|
// check the rate limits. error if over the limit
|
|
// TODO: i think this should be in an "impl From" or "impl Into"
|
|
let (authorization, semaphore) = match app
|
|
.rate_limit_by_rpc_key(ip, origin, proxy_mode, referer, rpc_key, user_agent)
|
|
.await?
|
|
{
|
|
RateLimitResult::Allowed(authorization, semaphore) => (authorization, semaphore),
|
|
RateLimitResult::RateLimited(authorization, retry_at) => {
|
|
return Err(Web3ProxyError::RateLimited(authorization, retry_at));
|
|
}
|
|
RateLimitResult::UnknownKey => return Err(Web3ProxyError::UnknownKey),
|
|
};
|
|
|
|
// TODO: DRY and maybe optimize the hashing
|
|
// in the background, add the ip to a recent_users map
|
|
if app.config.public_recent_ips_salt.is_some() {
|
|
let app = app.clone();
|
|
let user_id = authorization.checks.user_id;
|
|
let f = async move {
|
|
let now = Utc::now().timestamp();
|
|
|
|
if let Some(mut redis_conn) = app.redis_conn().await? {
|
|
let salt = app
|
|
.config
|
|
.public_recent_ips_salt
|
|
.as_ref()
|
|
.expect("public_recent_ips_salt must exist in here");
|
|
|
|
let salted_user_id = format!("{}:{}", salt, user_id);
|
|
|
|
let hashed_user_id = Bytes::from(keccak256(salted_user_id.as_bytes()));
|
|
|
|
let recent_user_id_key = format!("recent_users:id:{}", app.config.chain_id);
|
|
|
|
redis_conn
|
|
.zadd(recent_user_id_key, hashed_user_id.to_string(), now)
|
|
.await?;
|
|
}
|
|
|
|
Ok::<_, Web3ProxyError>(())
|
|
}
|
|
.map_err(|err| {
|
|
warn!("background update of recent_users:id failed: {}", err);
|
|
|
|
err
|
|
});
|
|
|
|
tokio::spawn(f);
|
|
}
|
|
|
|
Ok((authorization, semaphore))
|
|
}
|
|
|
|
impl Web3ProxyApp {
|
|
/// Limit the number of concurrent requests from the given ip address.
|
|
pub async fn ip_semaphore(&self, ip: &IpAddr) -> Web3ProxyResult<Option<OwnedSemaphorePermit>> {
|
|
if let Some(max_concurrent_requests) = self.config.public_max_concurrent_requests {
|
|
let semaphore = self
|
|
.ip_semaphores
|
|
.get_or_insert_async::<Infallible>(ip, async move {
|
|
// TODO: set max_concurrent_requests dynamically based on load?
|
|
let s = Semaphore::new(max_concurrent_requests);
|
|
Ok(Arc::new(s))
|
|
})
|
|
.await
|
|
.expect("infallible");
|
|
|
|
let semaphore_permit = semaphore.acquire_owned().await?;
|
|
|
|
Ok(Some(semaphore_permit))
|
|
} else {
|
|
Ok(None)
|
|
}
|
|
}
|
|
|
|
/// Limit the number of concurrent requests for a given user across all of their keys
|
|
pub async fn user_semaphore(
|
|
&self,
|
|
authorization_checks: &AuthorizationChecks,
|
|
) -> Web3ProxyResult<Option<OwnedSemaphorePermit>> {
|
|
if let Some(max_concurrent_requests) = authorization_checks.max_concurrent_requests {
|
|
let user_id = authorization_checks
|
|
.user_id
|
|
.try_into()
|
|
.or(Err(Web3ProxyError::UserIdZero))?;
|
|
|
|
let semaphore = self
|
|
.user_semaphores
|
|
.get_or_insert_async::<Infallible>(&user_id, async move {
|
|
let s = Semaphore::new(max_concurrent_requests as usize);
|
|
Ok(Arc::new(s))
|
|
})
|
|
.await
|
|
.expect("infallible");
|
|
|
|
let semaphore_permit = semaphore.acquire_owned().await?;
|
|
|
|
Ok(Some(semaphore_permit))
|
|
} else {
|
|
// unlimited concurrency
|
|
Ok(None)
|
|
}
|
|
}
|
|
|
|
/// Verify that the given bearer token and address are allowed to take the specified action.
|
|
/// This includes concurrent request limiting.
|
|
pub async fn bearer_is_authorized(
|
|
&self,
|
|
bearer: Bearer,
|
|
) -> Web3ProxyResult<(user::Model, OwnedSemaphorePermit)> {
|
|
// get the user id for this bearer token
|
|
let user_bearer_token = UserBearerToken::try_from(bearer)?;
|
|
|
|
// limit concurrent requests
|
|
let semaphore = self
|
|
.bearer_token_semaphores
|
|
.get_or_insert_async::<Infallible>(&user_bearer_token, async move {
|
|
let s = Semaphore::new(self.config.bearer_token_max_concurrent_requests as usize);
|
|
Ok(Arc::new(s))
|
|
})
|
|
.await
|
|
.expect("infallible");
|
|
|
|
let semaphore_permit = semaphore.acquire_owned().await?;
|
|
|
|
// get the attached address from the database for the given auth_token.
|
|
let db_replica = self
|
|
.db_replica()
|
|
.web3_context("checking if bearer token is authorized")?;
|
|
|
|
let user_bearer_uuid: Uuid = user_bearer_token.into();
|
|
|
|
let user = user::Entity::find()
|
|
.left_join(login::Entity)
|
|
.filter(login::Column::BearerToken.eq(user_bearer_uuid))
|
|
.one(db_replica.conn())
|
|
.await
|
|
.web3_context("fetching user from db by bearer token")?
|
|
.web3_context("unknown bearer token")?;
|
|
|
|
Ok((user, semaphore_permit))
|
|
}
|
|
|
|
pub async fn rate_limit_login(
|
|
&self,
|
|
ip: IpAddr,
|
|
proxy_mode: ProxyMode,
|
|
) -> Web3ProxyResult<RateLimitResult> {
|
|
// TODO: dry this up with rate_limit_by_rpc_key?
|
|
|
|
// we don't care about user agent or origin or referer
|
|
let authorization = Authorization::external(
|
|
&self.config.allowed_origin_requests_per_period,
|
|
self.db_conn(),
|
|
ip,
|
|
None,
|
|
proxy_mode,
|
|
None,
|
|
None,
|
|
)?;
|
|
|
|
// no semaphore is needed here because login rate limits are low
|
|
// TODO: are we sure do we want a semaphore here?
|
|
let semaphore = None;
|
|
|
|
if let Some(rate_limiter) = &self.login_rate_limiter {
|
|
match rate_limiter.throttle_label(&ip.to_string(), None, 1).await {
|
|
Ok(RedisRateLimitResult::Allowed(_)) => {
|
|
Ok(RateLimitResult::Allowed(authorization, semaphore))
|
|
}
|
|
Ok(RedisRateLimitResult::RetryAt(retry_at, _)) => {
|
|
// TODO: set headers so they know when they can retry
|
|
// TODO: debug or trace?
|
|
// this is too verbose, but a stat might be good
|
|
// // trace!(?ip, "login rate limit exceeded until {:?}", retry_at);
|
|
|
|
Ok(RateLimitResult::RateLimited(authorization, Some(retry_at)))
|
|
}
|
|
Ok(RedisRateLimitResult::RetryNever) => {
|
|
// TODO: i don't think we'll get here. maybe if we ban an IP forever? seems unlikely
|
|
// // trace!(?ip, "login rate limit is 0");
|
|
Ok(RateLimitResult::RateLimited(authorization, None))
|
|
}
|
|
Err(err) => {
|
|
// internal error, not rate limit being hit
|
|
// TODO: i really want axum to do this for us in a single place.
|
|
error!("login rate limiter is unhappy. allowing ip. err={:?}", err);
|
|
|
|
Ok(RateLimitResult::Allowed(authorization, None))
|
|
}
|
|
}
|
|
} else {
|
|
// TODO: if no redis, rate limit with a local cache? "warn!" probably isn't right
|
|
Ok(RateLimitResult::Allowed(authorization, None))
|
|
}
|
|
}
|
|
|
|
/// origin is included because it can override the default rate limits
|
|
pub async fn rate_limit_by_ip(
|
|
&self,
|
|
allowed_origin_requests_per_period: &HashMap<String, u64>,
|
|
ip: IpAddr,
|
|
origin: Option<Origin>,
|
|
proxy_mode: ProxyMode,
|
|
) -> Web3ProxyResult<RateLimitResult> {
|
|
// ip rate limits don't check referer or user agent
|
|
// they do check origin because we can override rate limits for some origins
|
|
let authorization = Authorization::external(
|
|
allowed_origin_requests_per_period,
|
|
self.db_conn(),
|
|
ip,
|
|
origin,
|
|
proxy_mode,
|
|
None,
|
|
None,
|
|
)?;
|
|
|
|
if let Some(rate_limiter) = &self.frontend_ip_rate_limiter {
|
|
match rate_limiter
|
|
.throttle(ip, authorization.checks.max_requests_per_period, 1)
|
|
.await
|
|
{
|
|
Ok(DeferredRateLimitResult::Allowed) => {
|
|
// rate limit allowed us. check concurrent request limits
|
|
let semaphore = self.ip_semaphore(&ip).await?;
|
|
|
|
Ok(RateLimitResult::Allowed(authorization, semaphore))
|
|
}
|
|
Ok(DeferredRateLimitResult::RetryAt(retry_at)) => {
|
|
// TODO: set headers so they know when they can retry
|
|
// // trace!(?ip, "rate limit exceeded until {:?}", retry_at);
|
|
Ok(RateLimitResult::RateLimited(authorization, Some(retry_at)))
|
|
}
|
|
Ok(DeferredRateLimitResult::RetryNever) => {
|
|
// TODO: i don't think we'll get here. maybe if we ban an IP forever? seems unlikely
|
|
// // trace!(?ip, "rate limit is 0");
|
|
Ok(RateLimitResult::RateLimited(authorization, None))
|
|
}
|
|
Err(err) => {
|
|
// this an internal error of some kind, not the rate limit being hit
|
|
// TODO: i really want axum to do this for us in a single place.
|
|
error!("rate limiter is unhappy. allowing ip. err={:?}", err);
|
|
|
|
// at least we can still check the semaphore
|
|
let semaphore = self.ip_semaphore(&ip).await?;
|
|
|
|
Ok(RateLimitResult::Allowed(authorization, semaphore))
|
|
}
|
|
}
|
|
} else {
|
|
// no redis, but we can still check the ip semaphore
|
|
let semaphore = self.ip_semaphore(&ip).await?;
|
|
|
|
// TODO: if no redis, rate limit with a local cache? "warn!" probably isn't right
|
|
Ok(RateLimitResult::Allowed(authorization, semaphore))
|
|
}
|
|
}
|
|
|
|
// check the local cache for user data, or query the database
|
|
pub(crate) async fn authorization_checks(
|
|
&self,
|
|
proxy_mode: ProxyMode,
|
|
rpc_secret_key: RpcSecretKey,
|
|
) -> Web3ProxyResult<AuthorizationChecks> {
|
|
self.rpc_secret_key_cache
|
|
.get_or_insert_async(&rpc_secret_key, async move {
|
|
// trace!(?rpc_secret_key, "user cache miss");
|
|
|
|
let db_replica = self
|
|
.db_replica()
|
|
.web3_context("Getting database connection")?;
|
|
|
|
// TODO: join the user table to this to return the User? we don't always need it
|
|
// TODO: join on secondary users
|
|
// TODO: join on user tier
|
|
match rpc_key::Entity::find()
|
|
.filter(rpc_key::Column::SecretKey.eq(<Uuid>::from(rpc_secret_key)))
|
|
.filter(rpc_key::Column::Active.eq(true))
|
|
.one(db_replica.conn())
|
|
.await?
|
|
{
|
|
Some(rpc_key_model) => {
|
|
// TODO: move these splits into helper functions
|
|
// TODO: can we have sea orm handle this for us?
|
|
let user_model = user::Entity::find_by_id(rpc_key_model.user_id)
|
|
.one(db_replica.conn())
|
|
.await?
|
|
.context("no related user")?;
|
|
|
|
let balance = balance::Entity::find()
|
|
.filter(balance::Column::UserId.eq(user_model.id))
|
|
.one(db_replica.conn())
|
|
.await?
|
|
.map(|x| x.available_balance)
|
|
.unwrap_or_default();
|
|
|
|
let user_tier_model =
|
|
user_tier::Entity::find_by_id(user_model.user_tier_id)
|
|
.one(db_replica.conn())
|
|
.await?
|
|
.context("no related user tier")?;
|
|
|
|
let allowed_ips: Option<Vec<IpNet>> =
|
|
if let Some(allowed_ips) = rpc_key_model.allowed_ips {
|
|
let x = allowed_ips
|
|
.split(',')
|
|
.map(|x| x.trim().parse::<IpNet>())
|
|
.collect::<Result<Vec<_>, _>>()?;
|
|
Some(x)
|
|
} else {
|
|
None
|
|
};
|
|
|
|
let allowed_origins: Option<Vec<Origin>> =
|
|
if let Some(allowed_origins) = rpc_key_model.allowed_origins {
|
|
// TODO: do this without collecting twice?
|
|
let x = allowed_origins
|
|
.split(',')
|
|
.map(|x| HeaderValue::from_str(x.trim()))
|
|
.collect::<Result<Vec<_>, _>>()?
|
|
.into_iter()
|
|
.map(|x| Origin::decode(&mut [x].iter()))
|
|
.collect::<Result<Vec<_>, _>>()?;
|
|
|
|
Some(x)
|
|
} else {
|
|
None
|
|
};
|
|
|
|
let allowed_referers: Option<Vec<Referer>> =
|
|
if let Some(allowed_referers) = rpc_key_model.allowed_referers {
|
|
let x = allowed_referers
|
|
.split(',')
|
|
.map(|x| {
|
|
x.trim()
|
|
.parse::<Referer>()
|
|
.or(Err(Web3ProxyError::InvalidReferer))
|
|
})
|
|
.collect::<Result<Vec<_>, _>>()?;
|
|
|
|
Some(x)
|
|
} else {
|
|
None
|
|
};
|
|
|
|
let allowed_user_agents: Option<Vec<UserAgent>> =
|
|
if let Some(allowed_user_agents) = rpc_key_model.allowed_user_agents {
|
|
let x: Result<Vec<_>, _> = allowed_user_agents
|
|
.split(',')
|
|
.map(|x| {
|
|
x.trim()
|
|
.parse::<UserAgent>()
|
|
.or(Err(Web3ProxyError::InvalidUserAgent))
|
|
})
|
|
.collect();
|
|
|
|
Some(x?)
|
|
} else {
|
|
None
|
|
};
|
|
|
|
let rpc_key_id =
|
|
Some(rpc_key_model.id.try_into().expect("db ids are never 0"));
|
|
|
|
Ok(AuthorizationChecks {
|
|
user_id: rpc_key_model.user_id,
|
|
rpc_secret_key: Some(rpc_secret_key),
|
|
rpc_secret_key_id: rpc_key_id,
|
|
allowed_ips,
|
|
allowed_origins,
|
|
allowed_referers,
|
|
allowed_user_agents,
|
|
tracking_level: rpc_key_model.log_level,
|
|
log_revert_chance: rpc_key_model.log_revert_chance,
|
|
max_concurrent_requests: user_tier_model.max_concurrent_requests,
|
|
max_requests_per_period: user_tier_model.max_requests_per_period,
|
|
private_txs: rpc_key_model.private_txs,
|
|
proxy_mode,
|
|
balance: Some(balance),
|
|
})
|
|
}
|
|
None => Ok(AuthorizationChecks::default()),
|
|
}
|
|
})
|
|
.await
|
|
}
|
|
|
|
/// Authorized the ip/origin/referer/useragent and rate limit and concurrency
|
|
pub async fn rate_limit_by_rpc_key(
|
|
&self,
|
|
ip: IpAddr,
|
|
origin: Option<Origin>,
|
|
proxy_mode: ProxyMode,
|
|
referer: Option<Referer>,
|
|
rpc_key: RpcSecretKey,
|
|
user_agent: Option<UserAgent>,
|
|
) -> Web3ProxyResult<RateLimitResult> {
|
|
let authorization_checks = self.authorization_checks(proxy_mode, rpc_key).await?;
|
|
|
|
// if no rpc_key_id matching the given rpc was found, then we can't rate limit by key
|
|
if authorization_checks.rpc_secret_key_id.is_none() {
|
|
return Ok(RateLimitResult::UnknownKey);
|
|
}
|
|
|
|
// TODO: rpc_key should have an option to rate limit by ip instead of by key
|
|
|
|
// only allow this rpc_key to run a limited amount of concurrent requests
|
|
// TODO: rate limit should be BEFORE the semaphore!
|
|
let semaphore = self.user_semaphore(&authorization_checks).await?;
|
|
|
|
let authorization = Authorization::try_new(
|
|
authorization_checks,
|
|
self.db_conn(),
|
|
ip,
|
|
origin,
|
|
referer,
|
|
user_agent,
|
|
AuthorizationType::Frontend,
|
|
)?;
|
|
|
|
let user_max_requests_per_period = match authorization.checks.max_requests_per_period {
|
|
None => {
|
|
return Ok(RateLimitResult::Allowed(authorization, semaphore));
|
|
}
|
|
Some(x) => x,
|
|
};
|
|
|
|
// user key is valid. now check rate limits
|
|
if let Some(rate_limiter) = &self.frontend_registered_user_rate_limiter {
|
|
match rate_limiter
|
|
.throttle(
|
|
authorization.checks.user_id,
|
|
Some(user_max_requests_per_period),
|
|
1,
|
|
)
|
|
.await
|
|
{
|
|
Ok(DeferredRateLimitResult::Allowed) => {
|
|
Ok(RateLimitResult::Allowed(authorization, semaphore))
|
|
}
|
|
Ok(DeferredRateLimitResult::RetryAt(retry_at)) => {
|
|
// TODO: set headers so they know when they can retry
|
|
// TODO: debug or trace?
|
|
// this is too verbose, but a stat might be good
|
|
// TODO: keys are secrets! use the id instead
|
|
// TODO: emit a stat
|
|
// // trace!(?rpc_key, "rate limit exceeded until {:?}", retry_at);
|
|
Ok(RateLimitResult::RateLimited(authorization, Some(retry_at)))
|
|
}
|
|
Ok(DeferredRateLimitResult::RetryNever) => {
|
|
// TODO: keys are secret. don't log them!
|
|
// // trace!(?rpc_key, "rate limit is 0");
|
|
// TODO: emit a stat
|
|
Ok(RateLimitResult::RateLimited(authorization, None))
|
|
}
|
|
Err(err) => {
|
|
// internal error, not rate limit being hit
|
|
// TODO: i really want axum to do this for us in a single place.
|
|
error!("rate limiter is unhappy. allowing ip. err={:?}", err);
|
|
|
|
Ok(RateLimitResult::Allowed(authorization, semaphore))
|
|
}
|
|
}
|
|
} else {
|
|
// TODO: if no redis, rate limit with just a local cache?
|
|
Ok(RateLimitResult::Allowed(authorization, semaphore))
|
|
}
|
|
}
|
|
}
|
|
|
|
impl Authorization {
|
|
pub async fn check_again(
|
|
&self,
|
|
app: &Arc<Web3ProxyApp>,
|
|
) -> Web3ProxyResult<(Arc<Self>, Option<OwnedSemaphorePermit>)> {
|
|
// TODO: we could probably do this without clones. but this is easy
|
|
let (a, s) = if let Some(rpc_secret_key) = self.checks.rpc_secret_key {
|
|
key_is_authorized(
|
|
app,
|
|
rpc_secret_key,
|
|
self.ip,
|
|
self.origin.clone(),
|
|
self.checks.proxy_mode,
|
|
self.referer.clone(),
|
|
self.user_agent.clone(),
|
|
)
|
|
.await?
|
|
} else {
|
|
ip_is_authorized(app, self.ip, self.origin.clone(), self.checks.proxy_mode).await?
|
|
};
|
|
|
|
let a = Arc::new(a);
|
|
|
|
Ok((a, s))
|
|
}
|
|
}
|