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use crate::{
chain::{self, state::StateErrorKind},
config::ValidatorConfig,
connection::{tcp, unix::UnixConnection, Connection},
error::{Error, ErrorKind::*},
prelude::*,
prost::Message,
rpc::{Request, Response, TendermintRequest},
};
use std::{fmt::Debug, os::unix::net::UnixStream, time::Instant};
use tendermint::{
amino_types::{PingRequest, PingResponse, PubKeyRequest, PubKeyResponse, RemoteError},
consensus::state::NIL_PLACEHOLDER,
net,
};
pub struct Session {
config: ValidatorConfig,
connection: Box<dyn Connection>,
}
impl Session {
pub fn open(config: ValidatorConfig) -> Result<Self, Error> {
let connection: Box<dyn Connection> = match &config.addr {
net::Address::Tcp {
peer_id,
host,
port,
} => {
debug!("{}: Connecting to {}...", &config.chain_id, &config.addr);
let seed = config.load_secret_key()?;
let conn = tcp::open_secret_connection(host, *port, peer_id, &seed)?;
info!(
"[{}@{}] connected to validator successfully",
&config.chain_id, &config.addr
);
if peer_id.is_none() {
warn!(
"[{}] {}: unverified validator peer ID! ({})",
&config.chain_id,
&config.addr,
conn.remote_pubkey().peer_id()
);
}
Box::new(conn)
}
net::Address::Unix { path } => {
debug!(
"{}: Connecting to socket at {}...",
&config.chain_id, &config.addr
);
let socket = UnixStream::connect(path)?;
let conn = UnixConnection::new(socket);
info!(
"[{}@{}] connected to validator successfully",
&config.chain_id, &config.addr
);
Box::new(conn)
}
};
Ok(Self { config, connection })
}
pub fn request_loop(&mut self) -> Result<(), Error> {
while self.handle_request()? {}
Ok(())
}
fn handle_request(&mut self) -> Result<bool, Error> {
let request = Request::read(&mut self.connection)?;
debug!(
"[{}:{}] received request: {:?}",
&self.config.chain_id, &self.config.addr, &request
);
let response = match request {
Request::SignProposal(req) => self.sign(req)?,
Request::SignVote(req) => self.sign(req)?,
Request::ReplyPing(ref req) => self.reply_ping(req),
Request::ShowPublicKey(ref req) => self.get_public_key(req)?,
};
debug!(
"[{}:{}] sending response: {:?}",
&self.config.chain_id, &self.config.addr, &response
);
let mut buf = vec![];
match response {
Response::SignedProposal(sp) => sp.encode(&mut buf)?,
Response::SignedVote(sv) => sv.encode(&mut buf)?,
Response::Ping(ping) => ping.encode(&mut buf)?,
Response::PublicKey(pk) => pk.encode(&mut buf)?,
}
self.connection.write_all(&buf)?;
Ok(true)
}
fn sign<T: TendermintRequest + Debug>(&mut self, mut request: T) -> Result<Response, Error> {
request.validate()?;
let registry = chain::REGISTRY.get();
let chain = registry.get_chain(&self.config.chain_id).unwrap();
if let Some(request_state) = &request.consensus_state() {
let mut chain_state = chain.state.lock().unwrap();
if let Err(e) = chain_state.update_consensus_state(request_state.clone()) {
if e.kind() == StateErrorKind::DoubleSign {
let height = request.height().unwrap();
error!(
"[{}:{}] attempted double sign at h/r/s: {} ({} != {})",
&self.config.chain_id,
&self.config.addr,
request_state,
chain_state.consensus_state().block_id_prefix(),
request_state.block_id_prefix()
);
let remote_err = RemoteError::double_sign(height);
return Ok(request.build_response(Some(remote_err)));
} else {
return Err(e.into());
}
}
}
if let Some(max_height) = self.config.max_height {
if let Some(height) = request.height() {
if height > max_height.value() as i64 {
fail!(
ExceedMaxHeight,
"attempted to sign at height {} which is greater than {}",
height,
max_height,
);
}
}
}
let mut to_sign = vec![];
request.sign_bytes(self.config.chain_id, &mut to_sign)?;
let started_at = Instant::now();
let signature = chain.keyring.sign_ed25519(None, &to_sign)?;
self.log_signing_request(&request, started_at);
request.set_signature(&signature);
Ok(request.build_response(None))
}
fn reply_ping(&mut self, _request: &PingRequest) -> Response {
debug!("replying with PingResponse");
Response::Ping(PingResponse {})
}
fn get_public_key(&mut self, _request: &PubKeyRequest) -> Result<Response, Error> {
let registry = chain::REGISTRY.get();
let chain = registry.get_chain(&self.config.chain_id).unwrap();
Ok(Response::PublicKey(PubKeyResponse::from(
*chain.keyring.default_pubkey()?,
)))
}
fn log_signing_request<T: TendermintRequest + Debug>(&self, request: &T, started_at: Instant) {
let (consensus_state, block_id) = request
.consensus_state()
.map(|state| (state.to_string(), state.block_id_prefix()))
.unwrap_or_else(|| (NIL_PLACEHOLDER.to_owned(), NIL_PLACEHOLDER.to_owned()));
let msg_type = request
.msg_type()
.map(|t| format!("{:?}", t))
.unwrap_or_else(|| "Unknown".to_owned());
info!(
"[{}@{}] signed {}:{} at h/r/s {} ({} ms)",
&self.config.chain_id,
&self.config.addr,
msg_type,
block_id,
consensus_state,
started_at.elapsed().as_millis(),
);
}
}