681 lines
24 KiB
Rust
681 lines
24 KiB
Rust
//! The `thin_client` module is a client-side object that interfaces with
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//! a server-side TPU. Client code should use this object instead of writing
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//! messages to the network directly. The binary encoding of its messages are
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//! unstable and may change in future releases.
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use crate::cluster_info::{ClusterInfo, ClusterInfoError, NodeInfo};
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use crate::fullnode::{Fullnode, FullnodeConfig};
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use crate::gossip_service::GossipService;
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use crate::packet::PACKET_DATA_SIZE;
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use crate::result::{Error, Result};
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use crate::rpc_request::{RpcClient, RpcRequest, RpcRequestHandler};
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use bincode::serialize_into;
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use bs58;
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use serde_json;
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use solana_metrics;
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use solana_metrics::influxdb;
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use solana_sdk::account::Account;
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use solana_sdk::hash::Hash;
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use solana_sdk::pubkey::Pubkey;
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use solana_sdk::signature::{Keypair, KeypairUtil, Signature};
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use solana_sdk::system_transaction::SystemTransaction;
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use solana_sdk::timing;
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use solana_sdk::transaction::Transaction;
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use std;
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use std::io;
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use std::net::{SocketAddr, UdpSocket};
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use std::sync::atomic::AtomicBool;
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use std::sync::{Arc, RwLock};
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use std::thread::sleep;
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use std::time::Duration;
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use std::time::Instant;
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/// An object for querying and sending transactions to the network.
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pub struct ThinClient {
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rpc_addr: SocketAddr,
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transactions_addr: SocketAddr,
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transactions_socket: UdpSocket,
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rpc_client: RpcClient,
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}
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impl ThinClient {
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/// Create a new ThinClient that will interface with the Rpc at `rpc_addr` using TCP
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/// and the Tpu at `transactions_addr` over `transactions_socket` using UDP.
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pub fn new(
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rpc_addr: SocketAddr,
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transactions_addr: SocketAddr,
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transactions_socket: UdpSocket,
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) -> Self {
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Self::new_from_client(
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rpc_addr,
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transactions_addr,
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transactions_socket,
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RpcClient::new_from_socket(rpc_addr),
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)
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}
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pub fn new_with_timeout(
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rpc_addr: SocketAddr,
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transactions_addr: SocketAddr,
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transactions_socket: UdpSocket,
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timeout: Duration,
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) -> Self {
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let rpc_client = RpcClient::new_with_timeout(rpc_addr, timeout);
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Self::new_from_client(rpc_addr, transactions_addr, transactions_socket, rpc_client)
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}
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fn new_from_client(
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rpc_addr: SocketAddr,
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transactions_addr: SocketAddr,
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transactions_socket: UdpSocket,
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rpc_client: RpcClient,
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) -> Self {
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ThinClient {
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rpc_client,
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rpc_addr,
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transactions_addr,
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transactions_socket,
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}
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}
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/// Send a signed Transaction to the server for processing. This method
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/// does not wait for a response.
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pub fn transfer_signed(&self, transaction: &Transaction) -> io::Result<Signature> {
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let mut buf = vec![0; transaction.serialized_size().unwrap() as usize];
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let mut wr = std::io::Cursor::new(&mut buf[..]);
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serialize_into(&mut wr, &transaction)
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.expect("serialize Transaction in pub fn transfer_signed");
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assert!(buf.len() < PACKET_DATA_SIZE);
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self.transactions_socket
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.send_to(&buf[..], &self.transactions_addr)?;
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Ok(transaction.signatures[0])
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}
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/// Retry a sending a signed Transaction to the server for processing.
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pub fn retry_transfer(
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&mut self,
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keypair: &Keypair,
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transaction: &mut Transaction,
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tries: usize,
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) -> io::Result<Signature> {
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for x in 0..tries {
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transaction.sign(&[keypair], self.get_last_id());
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let mut buf = vec![0; transaction.serialized_size().unwrap() as usize];
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let mut wr = std::io::Cursor::new(&mut buf[..]);
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serialize_into(&mut wr, &transaction)
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.expect("serialize Transaction in pub fn transfer_signed");
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self.transactions_socket
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.send_to(&buf[..], &self.transactions_addr)?;
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if self.poll_for_signature(&transaction.signatures[0]).is_ok() {
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return Ok(transaction.signatures[0]);
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}
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info!("{} tries failed transfer to {}", x, self.transactions_addr);
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}
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Err(io::Error::new(
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io::ErrorKind::Other,
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"retry_transfer failed",
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))
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}
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/// Creates, signs, and processes a Transaction. Useful for writing unit-tests.
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pub fn transfer(
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&self,
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tokens: u64,
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keypair: &Keypair,
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to: Pubkey,
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last_id: &Hash,
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) -> io::Result<Signature> {
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debug!(
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"transfer: tokens={} from={:?} to={:?} last_id={:?}",
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tokens,
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keypair.pubkey(),
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to,
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last_id
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);
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let now = Instant::now();
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let transaction = SystemTransaction::new_account(keypair, to, tokens, *last_id, 0);
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let result = self.transfer_signed(&transaction);
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solana_metrics::submit(
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influxdb::Point::new("thinclient")
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.add_tag("op", influxdb::Value::String("transfer".to_string()))
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.add_field(
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"duration_ms",
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influxdb::Value::Integer(timing::duration_as_ms(&now.elapsed()) as i64),
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)
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.to_owned(),
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);
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result
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}
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pub fn get_account_userdata(&mut self, pubkey: &Pubkey) -> io::Result<Option<Vec<u8>>> {
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let params = json!([format!("{}", pubkey)]);
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let response =
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self.rpc_client
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.make_rpc_request(1, RpcRequest::GetAccountInfo, Some(params));
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match response {
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Ok(account_json) => {
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let account: Account =
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serde_json::from_value(account_json).expect("deserialize account");
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Ok(Some(account.userdata))
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}
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Err(error) => {
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debug!("get_account_userdata failed: {:?}", error);
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Err(io::Error::new(
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io::ErrorKind::Other,
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"get_account_userdata failed",
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))
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}
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}
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}
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/// Request the balance of the user holding `pubkey`. This method blocks
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/// until the server sends a response. If the response packet is dropped
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/// by the network, this method will hang indefinitely.
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pub fn get_balance(&mut self, pubkey: &Pubkey) -> io::Result<u64> {
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trace!("get_balance sending request to {}", self.rpc_addr);
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let params = json!([format!("{}", pubkey)]);
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let response =
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self.rpc_client
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.make_rpc_request(1, RpcRequest::GetAccountInfo, Some(params));
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response
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.and_then(|account_json| {
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let account: Account =
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serde_json::from_value(account_json).expect("deserialize account");
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trace!("Response account {:?} {:?}", pubkey, account);
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trace!("get_balance {:?}", account.tokens);
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Ok(account.tokens)
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})
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.map_err(|error| {
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debug!("Response account {}: None (error: {:?})", pubkey, error);
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io::Error::new(io::ErrorKind::Other, "AccountNotFound")
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})
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}
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/// Request the transaction count. If the response packet is dropped by the network,
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/// this method will try again 5 times.
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pub fn transaction_count(&mut self) -> u64 {
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debug!("transaction_count");
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for _tries in 0..5 {
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let response =
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self.rpc_client
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.make_rpc_request(1, RpcRequest::GetTransactionCount, None);
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match response {
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Ok(value) => {
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debug!("transaction_count response: {:?}", value);
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let transaction_count = value.as_u64().unwrap();
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return transaction_count;
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}
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Err(error) => {
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debug!("transaction_count failed: {:?}", error);
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}
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};
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}
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0
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}
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/// Request the last Entry ID from the server without blocking.
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/// Returns the last_id Hash or None if there was no response from the server.
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pub fn try_get_last_id(&mut self, mut num_retries: u64) -> Option<Hash> {
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loop {
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trace!("try_get_last_id send_to {}", &self.rpc_addr);
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let response = self
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.rpc_client
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.make_rpc_request(1, RpcRequest::GetLastId, None);
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match response {
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Ok(value) => {
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let last_id_str = value.as_str().unwrap();
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let last_id_vec = bs58::decode(last_id_str).into_vec().unwrap();
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return Some(Hash::new(&last_id_vec));
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}
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Err(error) => {
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debug!("thin_client get_last_id error: {:?}", error);
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num_retries -= 1;
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if num_retries == 0 {
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return None;
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}
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}
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}
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}
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}
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/// Request the last Entry ID from the server. This method blocks
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/// until the server sends a response.
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pub fn get_last_id(&mut self) -> Hash {
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loop {
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trace!("get_last_id send_to {}", &self.rpc_addr);
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if let Some(hash) = self.try_get_last_id(10) {
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return hash;
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}
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}
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}
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/// Request a new last Entry ID from the server. This method blocks
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/// until the server sends a response.
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pub fn get_next_last_id(&mut self, previous_last_id: &Hash) -> Hash {
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self.get_next_last_id_ext(previous_last_id, &|| {
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sleep(Duration::from_millis(100));
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})
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}
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pub fn get_next_last_id_ext(&mut self, previous_last_id: &Hash, func: &Fn()) -> Hash {
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loop {
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let last_id = self.get_last_id();
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if last_id != *previous_last_id {
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break last_id;
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}
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debug!("Got same last_id ({:?}), will retry...", last_id);
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func()
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}
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}
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pub fn submit_poll_balance_metrics(elapsed: &Duration) {
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solana_metrics::submit(
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influxdb::Point::new("thinclient")
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.add_tag("op", influxdb::Value::String("get_balance".to_string()))
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.add_field(
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"duration_ms",
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influxdb::Value::Integer(timing::duration_as_ms(elapsed) as i64),
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)
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.to_owned(),
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);
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}
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pub fn poll_balance_with_timeout(
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&mut self,
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pubkey: &Pubkey,
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polling_frequency: &Duration,
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timeout: &Duration,
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) -> io::Result<u64> {
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let now = Instant::now();
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loop {
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match self.get_balance(&pubkey) {
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Ok(bal) => {
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ThinClient::submit_poll_balance_metrics(&now.elapsed());
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return Ok(bal);
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}
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Err(e) => {
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sleep(*polling_frequency);
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if now.elapsed() > *timeout {
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ThinClient::submit_poll_balance_metrics(&now.elapsed());
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return Err(e);
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}
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}
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};
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}
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}
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pub fn poll_get_balance(&mut self, pubkey: &Pubkey) -> io::Result<u64> {
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self.poll_balance_with_timeout(pubkey, &Duration::from_millis(100), &Duration::from_secs(1))
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}
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/// Poll the server to confirm a transaction.
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pub fn poll_for_signature(&mut self, signature: &Signature) -> io::Result<()> {
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let now = Instant::now();
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while !self.check_signature(signature) {
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if now.elapsed().as_secs() > 15 {
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// TODO: Return a better error.
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return Err(io::Error::new(io::ErrorKind::Other, "signature not found"));
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}
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sleep(Duration::from_millis(250));
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}
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Ok(())
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}
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/// Check a signature in the bank. This method blocks
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/// until the server sends a response.
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pub fn check_signature(&mut self, signature: &Signature) -> bool {
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trace!("check_signature: {:?}", signature);
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let params = json!([format!("{}", signature)]);
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let now = Instant::now();
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loop {
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let response = self.rpc_client.make_rpc_request(
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1,
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RpcRequest::ConfirmTransaction,
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Some(params.clone()),
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);
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match response {
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Ok(confirmation) => {
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let signature_status = confirmation.as_bool().unwrap();
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if signature_status {
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trace!("Response found signature");
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} else {
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trace!("Response signature not found");
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}
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solana_metrics::submit(
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influxdb::Point::new("thinclient")
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.add_tag("op", influxdb::Value::String("check_signature".to_string()))
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.add_field(
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"duration_ms",
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influxdb::Value::Integer(
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timing::duration_as_ms(&now.elapsed()) as i64
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),
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)
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.to_owned(),
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);
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return signature_status;
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}
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Err(err) => {
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debug!("check_signature request failed: {:?}", err);
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}
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};
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}
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}
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}
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impl Drop for ThinClient {
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fn drop(&mut self) {
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solana_metrics::flush();
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}
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}
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pub fn poll_gossip_for_leader(leader_gossip: SocketAddr, timeout: Option<u64>) -> Result<NodeInfo> {
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let exit = Arc::new(AtomicBool::new(false));
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let (node, gossip_socket) = ClusterInfo::spy_node();
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let my_addr = gossip_socket.local_addr().unwrap();
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let cluster_info = Arc::new(RwLock::new(ClusterInfo::new(node)));
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let gossip_service = GossipService::new(
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&cluster_info.clone(),
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None,
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None,
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gossip_socket,
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exit.clone(),
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);
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let leader_entry_point = NodeInfo::new_entry_point(&leader_gossip);
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cluster_info
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.write()
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.unwrap()
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.insert_info(leader_entry_point);
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sleep(Duration::from_millis(100));
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let deadline = match timeout {
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Some(timeout) => Duration::new(timeout, 0),
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None => Duration::new(std::u64::MAX, 0),
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};
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let now = Instant::now();
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// Block until leader's correct contact info is received
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let leader;
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loop {
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trace!("polling {:?} for leader from {:?}", leader_gossip, my_addr);
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if let Some(l) = cluster_info.read().unwrap().get_gossip_top_leader() {
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leader = Some(l.clone());
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break;
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}
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if log_enabled!(log::Level::Trace) {
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trace!("{}", cluster_info.read().unwrap().node_info_trace());
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}
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if now.elapsed() > deadline {
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return Err(Error::ClusterInfoError(ClusterInfoError::NoLeader));
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}
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sleep(Duration::from_millis(100));
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}
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gossip_service.close()?;
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if log_enabled!(log::Level::Trace) {
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trace!("{}", cluster_info.read().unwrap().node_info_trace());
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}
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Ok(leader.unwrap().clone())
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}
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pub fn retry_get_balance(
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client: &mut ThinClient,
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bob_pubkey: &Pubkey,
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expected_balance: Option<u64>,
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) -> Option<u64> {
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const LAST: usize = 30;
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for run in 0..LAST {
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let balance_result = client.poll_get_balance(bob_pubkey);
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if expected_balance.is_none() {
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return balance_result.ok();
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}
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trace!(
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"retry_get_balance[{}] {:?} {:?}",
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run,
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balance_result,
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expected_balance
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);
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if let (Some(expected_balance), Ok(balance_result)) = (expected_balance, balance_result) {
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if expected_balance == balance_result {
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return Some(balance_result);
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}
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}
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}
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None
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}
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pub fn new_fullnode() -> (Fullnode, NodeInfo, Keypair, String) {
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use crate::blocktree::create_new_tmp_ledger;
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use crate::cluster_info::Node;
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use crate::fullnode::Fullnode;
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use crate::voting_keypair::VotingKeypair;
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use solana_sdk::genesis_block::GenesisBlock;
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use solana_sdk::signature::KeypairUtil;
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let node_keypair = Arc::new(Keypair::new());
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let node = Node::new_localhost_with_pubkey(node_keypair.pubkey());
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let node_info = node.info.clone();
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let (genesis_block, mint_keypair) = GenesisBlock::new_with_leader(10_000, node_info.id, 42);
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let (ledger_path, _last_id) = create_new_tmp_ledger!(&genesis_block);
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let vote_account_keypair = Arc::new(Keypair::new());
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let voting_keypair = VotingKeypair::new_local(&vote_account_keypair);
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let node = Fullnode::new(
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node,
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&node_keypair,
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&ledger_path,
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voting_keypair,
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None,
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&FullnodeConfig::default(),
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);
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(node, node_info, mint_keypair, ledger_path)
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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use crate::client::mk_client;
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use bincode::{deserialize, serialize};
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use solana_sdk::system_instruction::SystemInstruction;
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use solana_sdk::vote_program::VoteState;
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use solana_sdk::vote_transaction::VoteTransaction;
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use std::fs::remove_dir_all;
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#[test]
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fn test_thin_client_basic() {
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solana_logger::setup();
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let (server, leader_data, alice, ledger_path) = new_fullnode();
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let server_exit = server.run(None);
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let bob_pubkey = Keypair::new().pubkey();
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info!(
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"found leader: {:?}",
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poll_gossip_for_leader(leader_data.gossip, Some(5)).unwrap()
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);
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let mut client = mk_client(&leader_data);
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let transaction_count = client.transaction_count();
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assert_eq!(transaction_count, 0);
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let last_id = client.get_last_id();
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|
info!("test_thin_client last_id: {:?}", last_id);
|
|
|
|
let signature = client.transfer(500, &alice, bob_pubkey, &last_id).unwrap();
|
|
info!("test_thin_client signature: {:?}", signature);
|
|
client.poll_for_signature(&signature).unwrap();
|
|
|
|
let balance = client.get_balance(&bob_pubkey);
|
|
assert_eq!(balance.unwrap(), 500);
|
|
|
|
let transaction_count = client.transaction_count();
|
|
assert_eq!(transaction_count, 1);
|
|
server_exit();
|
|
remove_dir_all(ledger_path).unwrap();
|
|
}
|
|
|
|
#[test]
|
|
#[ignore]
|
|
fn test_bad_sig() {
|
|
solana_logger::setup();
|
|
let (server, leader_data, alice, ledger_path) = new_fullnode();
|
|
let server_exit = server.run(None);
|
|
let bob_pubkey = Keypair::new().pubkey();
|
|
info!(
|
|
"found leader: {:?}",
|
|
poll_gossip_for_leader(leader_data.gossip, Some(5)).unwrap()
|
|
);
|
|
|
|
let mut client = mk_client(&leader_data);
|
|
|
|
let last_id = client.get_last_id();
|
|
|
|
let tx = SystemTransaction::new_account(&alice, bob_pubkey, 500, last_id, 0);
|
|
|
|
let _sig = client.transfer_signed(&tx).unwrap();
|
|
|
|
let last_id = client.get_last_id();
|
|
|
|
let mut tr2 = SystemTransaction::new_account(&alice, bob_pubkey, 501, last_id, 0);
|
|
let mut instruction2 = deserialize(tr2.userdata(0)).unwrap();
|
|
if let SystemInstruction::Move { ref mut tokens } = instruction2 {
|
|
*tokens = 502;
|
|
}
|
|
tr2.instructions[0].userdata = serialize(&instruction2).unwrap();
|
|
let signature = client.transfer_signed(&tr2).unwrap();
|
|
client.poll_for_signature(&signature).unwrap();
|
|
|
|
let balance = client.get_balance(&bob_pubkey);
|
|
assert_eq!(balance.unwrap(), 1001);
|
|
server_exit();
|
|
remove_dir_all(ledger_path).unwrap();
|
|
}
|
|
|
|
#[test]
|
|
fn test_register_vote_account() {
|
|
solana_logger::setup();
|
|
let (server, leader_data, alice, ledger_path) = new_fullnode();
|
|
let server_exit = server.run(None);
|
|
info!(
|
|
"found leader: {:?}",
|
|
poll_gossip_for_leader(leader_data.gossip, Some(5)).unwrap()
|
|
);
|
|
|
|
let mut client = mk_client(&leader_data);
|
|
|
|
// Create the validator account, transfer some tokens to that account
|
|
let validator_keypair = Keypair::new();
|
|
let last_id = client.get_last_id();
|
|
let signature = client
|
|
.transfer(500, &alice, validator_keypair.pubkey(), &last_id)
|
|
.unwrap();
|
|
|
|
client.poll_for_signature(&signature).unwrap();
|
|
|
|
// Create and register the vote account
|
|
let validator_vote_account_keypair = Keypair::new();
|
|
let vote_account_id = validator_vote_account_keypair.pubkey();
|
|
let last_id = client.get_last_id();
|
|
|
|
let transaction =
|
|
VoteTransaction::new_account(&validator_keypair, vote_account_id, last_id, 1, 1);
|
|
let signature = client.transfer_signed(&transaction).unwrap();
|
|
client.poll_for_signature(&signature).unwrap();
|
|
|
|
let balance = retry_get_balance(&mut client, &vote_account_id, Some(1))
|
|
.expect("Expected balance for new account to exist");
|
|
assert_eq!(balance, 1);
|
|
|
|
const LAST: usize = 30;
|
|
for run in 0..=LAST {
|
|
let account_user_data = client
|
|
.get_account_userdata(&vote_account_id)
|
|
.expect("Expected valid response for account userdata")
|
|
.expect("Expected valid account userdata to exist after account creation");
|
|
|
|
let vote_state = VoteState::deserialize(&account_user_data);
|
|
|
|
if vote_state.map(|vote_state| vote_state.node_id) == Ok(validator_keypair.pubkey()) {
|
|
break;
|
|
}
|
|
|
|
if run == LAST {
|
|
panic!("Expected successful vote account registration");
|
|
}
|
|
sleep(Duration::from_millis(900));
|
|
}
|
|
|
|
server_exit();
|
|
remove_dir_all(ledger_path).unwrap();
|
|
}
|
|
|
|
#[test]
|
|
fn test_transaction_count() {
|
|
// set a bogus address, see that we don't hang
|
|
solana_logger::setup();
|
|
let addr = "0.0.0.0:1234".parse().unwrap();
|
|
let transactions_socket = UdpSocket::bind("0.0.0.0:0").unwrap();
|
|
let mut client =
|
|
ThinClient::new_with_timeout(addr, addr, transactions_socket, Duration::from_secs(2));
|
|
assert_eq!(client.transaction_count(), 0);
|
|
}
|
|
|
|
#[test]
|
|
fn test_zero_balance_after_nonzero() {
|
|
solana_logger::setup();
|
|
let (server, leader_data, alice, ledger_path) = new_fullnode();
|
|
let server_exit = server.run(None);
|
|
let bob_keypair = Keypair::new();
|
|
|
|
info!(
|
|
"found leader: {:?}",
|
|
poll_gossip_for_leader(leader_data.gossip, Some(5)).unwrap()
|
|
);
|
|
|
|
let mut client = mk_client(&leader_data);
|
|
let last_id = client.get_last_id();
|
|
info!("test_thin_client last_id: {:?}", last_id);
|
|
|
|
let starting_alice_balance = client.poll_get_balance(&alice.pubkey()).unwrap();
|
|
info!("Alice has {} tokens", starting_alice_balance);
|
|
|
|
info!("Give Bob 500 tokens");
|
|
let signature = client
|
|
.transfer(500, &alice, bob_keypair.pubkey(), &last_id)
|
|
.unwrap();
|
|
client.poll_for_signature(&signature).unwrap();
|
|
|
|
let bob_balance = client.poll_get_balance(&bob_keypair.pubkey());
|
|
assert_eq!(bob_balance.unwrap(), 500);
|
|
|
|
info!("Take Bob's 500 tokens away");
|
|
let signature = client
|
|
.transfer(500, &bob_keypair, alice.pubkey(), &last_id)
|
|
.unwrap();
|
|
client.poll_for_signature(&signature).unwrap();
|
|
let alice_balance = client.poll_get_balance(&alice.pubkey()).unwrap();
|
|
assert_eq!(alice_balance, starting_alice_balance);
|
|
|
|
info!("Should get an error when Bob's balance hits zero and is purged");
|
|
let bob_balance = client.poll_get_balance(&bob_keypair.pubkey());
|
|
info!("Bob's balance is {:?}", bob_balance);
|
|
assert!(bob_balance.is_err(),);
|
|
|
|
server_exit();
|
|
remove_dir_all(ledger_path).unwrap();
|
|
}
|
|
}
|