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Shift changes into message handler and simple sync for rpc-rewrite

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This commit is contained in:
Age Manning
2019-07-16 22:32:37 +10:00
parent 704263e35f
commit 414d41cb57
11 changed files with 486 additions and 227 deletions
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193
beacon_node/network/src/message_handler.rs
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@@ -3,22 +3,19 @@ use crate::service::{NetworkMessage, OutgoingMessage};
use crate::sync::SimpleSync;
use beacon_chain::{BeaconChain, BeaconChainTypes};
use crossbeam_channel::{unbounded as channel, Sender};
use eth2_libp2p::rpc::methods::*;
use eth2_libp2p::{
behaviour::PubsubMessage,
rpc::{methods::GoodbyeReason, RPCRequest, RPCResponse, RequestId},
rpc::{RPCError, RPCErrorResponse, RPCRequest, RPCResponse, RequestId},
PeerId, RPCEvent,
};
use futures::future;
use slog::{debug, warn};
use slog::{debug, error, warn};
use ssz::Decode;
use std::collections::HashMap;
use std::sync::Arc;
use std::time::Instant;
/// Timeout for RPC requests.
// const REQUEST_TIMEOUT: Duration = Duration::from_secs(30);
/// Timeout before banning a peer for non-identification.
// const HELLO_TIMEOUT: Duration = Duration::from_secs(30);
/// Handles messages received from the network and client and organises syncing.
pub struct MessageHandler<T: BeaconChainTypes> {
/// Currently loaded and initialised beacon chain.
@@ -32,7 +29,7 @@ pub struct MessageHandler<T: BeaconChainTypes> {
}
/// Types of messages the handler can receive.
#[derive(Debug, Clone)]
#[derive(Debug)]
pub enum HandlerMessage {
/// We have initiated a connection to a new peer.
PeerDialed(PeerId),
@@ -87,6 +84,10 @@ impl<T: BeaconChainTypes + 'static> MessageHandler<T> {
HandlerMessage::PeerDialed(peer_id) => {
self.sync.on_connect(peer_id, &mut self.network_context);
}
// A peer has disconnected
HandlerMessage::PeerDisconnected(peer_id) => {
self.sync.on_disconnect(peer_id);
}
// we have received an RPC message request/response
HandlerMessage::RPC(peer_id, rpc_event) => {
self.handle_rpc_message(peer_id, rpc_event);
@@ -105,9 +106,9 @@ impl<T: BeaconChainTypes + 'static> MessageHandler<T> {
/// Handle RPC messages
fn handle_rpc_message(&mut self, peer_id: PeerId, rpc_message: RPCEvent) {
match rpc_message {
RPCEvent::Request { id, body, .. // TODO: Clean up RPC Message types, have a cleaner type by this point.
} => self.handle_rpc_request(peer_id, id, body),
RPCEvent::Response { id, result, .. } => self.handle_rpc_response(peer_id, id, result),
RPCEvent::Request(id, req) => self.handle_rpc_request(peer_id, id, req),
RPCEvent::Response(id, resp) => self.handle_rpc_response(peer_id, id, resp),
RPCEvent::Error(id, error) => self.handle_rpc_error(peer_id, id, error),
}
}
@@ -150,58 +151,137 @@ impl<T: BeaconChainTypes + 'static> MessageHandler<T> {
/// An RPC response has been received from the network.
// we match on id and ignore responses past the timeout.
fn handle_rpc_response(&mut self, peer_id: PeerId, id: RequestId, response: RPCResponse) {
// if response id is not related to a request, ignore (likely RPC timeout)
fn handle_rpc_response(
&mut self,
peer_id: PeerId,
id: RequestId,
error_response: RPCErrorResponse,
) {
//TODO: Potentially do not need to keep track of this at all. This has all been shifted
//into libp2p stack. Tracking Id's will only be necessary if a response is important
//relative to a specific request. Note: BeaconBlockBodies already returns with the data
//associated with its request.
// Currently leave this here for testing, to ensure it is redundant.
if self
.network_context
.outstanding_outgoing_request_ids
.remove(&(peer_id.clone(), id))
.is_none()
{
warn!(
// This should never happen. The RPC layer handles all timeouts and ensures a response
// matches a request.
debug_assert!(false);
error!(
self.log,
"Unknown ResponseId for incoming RPCRequest";
"peer" => format!("{:?}", peer_id),
"request_id" => format!("{:?}", id)
"request_id" => format!("{}", id)
);
return;
}
match response {
RPCResponse::Hello(hello_message) => {
self.sync
.on_hello_response(peer_id, hello_message, &mut self.network_context);
// an error could have occurred.
// TODO: Handle Error gracefully
match error_response {
RPCErrorResponse::EncodingError => {
warn!(self.log, "Encoding Error"; "peer" => format!("{:?}", peer_id), "request_id" => format!("{}",id))
}
RPCResponse::BeaconBlockRoots(response) => {
self.sync.on_beacon_block_roots_response(
peer_id,
response,
&mut self.network_context,
);
RPCErrorResponse::InvalidRequest(error) => {
warn!(self.log, "";"peer" => format!("{:?}", peer_id), "Invalid Request" => error.as_string())
}
RPCResponse::BeaconBlockHeaders(response) => {
self.sync.on_beacon_block_headers_response(
peer_id,
response,
&mut self.network_context,
);
RPCErrorResponse::ServerError(error) => {
warn!(self.log, "";"peer" => format!("{:?}", peer_id), "Server Error" => error.as_string())
}
RPCResponse::BeaconBlockBodies(response) => {
self.sync.on_beacon_block_bodies_response(
peer_id,
response,
&mut self.network_context,
);
RPCErrorResponse::Unknown(error) => {
warn!(self.log, "";"peer" => format!("{:?}", peer_id), "Unknown Error" => error.as_string())
}
RPCResponse::BeaconChainState(_) => {
// We do not implement this endpoint, it is not required and will only likely be
// useful for light-client support in later phases.
//
// Theoretically, we shouldn't reach this code because we should never send a
// beacon state RPC request.
warn!(self.log, "BeaconChainState RPC call is not supported.");
RPCErrorResponse::Success(response) => {
match response {
RPCResponse::Hello(hello_message) => {
self.sync.on_hello_response(
peer_id,
hello_message,
&mut self.network_context,
);
}
RPCResponse::BeaconBlockRoots(response) => {
self.sync.on_beacon_block_roots_response(
peer_id,
response,
&mut self.network_context,
);
}
RPCResponse::BeaconBlockHeaders(response) => {
if let Some(decoded_block_headers) = self.decode_block_headers(response) {
self.sync.on_beacon_block_headers_response(
peer_id,
decoded_block_headers,
&mut self.network_context,
);
} else {
warn!(self.log, "Peer sent invalid block headers";"peer" => format!("{:?}", peer_id))
}
}
RPCResponse::BeaconBlockBodies(response) => {
if let Some(decoded_block_bodies) = self.decode_block_bodies(response) {
self.sync.on_beacon_block_bodies_response(
peer_id,
decoded_block_bodies,
&mut self.network_context,
);
} else {
warn!(self.log, "Peer sent invalid block bodies";"peer" => format!("{:?}", peer_id))
}
}
RPCResponse::BeaconChainState(_) => {
// We do not implement this endpoint, it is not required and will only likely be
// useful for light-client support in later phases.
//
// Theoretically, we shouldn't reach this code because we should never send a
// beacon state RPC request.
warn!(self.log, "BeaconChainState RPC call is not supported.");
}
}
}
};
}
}
/// Verifies and decodes the ssz-encoded block bodies received from peers.
fn decode_block_bodies(
&self,
bodies_response: BeaconBlockBodiesResponse,
) -> Option<DecodedBeaconBlockBodiesResponse> {
//TODO: Implement faster block verification before decoding entirely
let simple_decoded_bodies =
EncodeableBeaconBlockBodiesResponse::from_ssz_bytes(&bodies_response.block_bodies);
//TODO: Potentially improve the types used here for SSZ encoding/decoding
if let Ok(simple_decoded_bodies) = simple_decoded_bodies {
Some(DecodedBeaconBlockBodiesResponse {
block_roots: bodies_response
.block_roots
.expect("Responses must have associated roots"),
block_bodies: simple_decoded_bodies.block_bodies,
})
} else {
None
}
}
/// Verifies and decodes the ssz-encoded block headers received from peers.
fn decode_block_headers(
&self,
headers_response: BeaconBlockHeadersResponse,
) -> Option<EncodeableBeaconBlockHeadersResponse> {
//TODO: Implement faster header verification before decoding entirely
EncodeableBeaconBlockHeadersResponse::from_ssz_bytes(&headers_response.headers).ok()
}
/// Handle various RPC errors
fn handle_rpc_error(&mut self, peer_id: PeerId, request_id: RequestId, error: RPCError) {
//TODO: Handle error correctly
warn!(self.log, "RPC Error"; "Peer" => format!("{:?}", peer_id), "Request Id" => format!("{}", request_id), "Error" => format!("{:?}", error));
}
/// Handle RPC messages
@@ -252,16 +332,10 @@ impl NetworkContext {
self.outstanding_outgoing_request_ids
.insert((peer_id.clone(), id), Instant::now());
self.send_rpc_event(
peer_id,
RPCEvent::Request {
id,
method_id: rpc_request.method_id(),
body: rpc_request,
},
);
self.send_rpc_event(peer_id, RPCEvent::Request(id, rpc_request));
}
//TODO: Handle Error responses
pub fn send_rpc_response(
&mut self,
peer_id: PeerId,
@@ -270,11 +344,7 @@ impl NetworkContext {
) {
self.send_rpc_event(
peer_id,
RPCEvent::Response {
id: request_id,
method_id: rpc_response.method_id(),
result: rpc_response,
},
RPCEvent::Response(request_id, RPCErrorResponse::Success(rpc_response)),
);
}
@@ -291,7 +361,6 @@ impl NetworkContext {
"Could not send RPC message to the network service"
)
});
//
}
/// Returns the next `RequestId` for sending an `RPCRequest` to the `peer_id`.
@@ -299,9 +368,9 @@ impl NetworkContext {
let next_id = self
.outgoing_request_ids
.entry(peer_id.clone())
.and_modify(RequestId::increment)
.or_insert_with(|| RequestId::from(1));
.and_modify(|id| *id += 1)
.or_insert_with(|| 0);
next_id.previous()
*next_id
}
}