Co-authored-by: Tobin C. Harding <tobin@coblox.tech>pull/30/head
Lucas Soriano del Pino
4 years ago
parent
4ee82a5a2a
commit
a4e4c27bee
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use libp2p::{
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request_response::{
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handler::RequestProtocol, ProtocolSupport, RequestResponse, RequestResponseConfig,
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RequestResponseEvent, RequestResponseMessage,
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},
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swarm::{NetworkBehaviourAction, NetworkBehaviourEventProcess, PollParameters},
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NetworkBehaviour,
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};
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use std::{
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collections::VecDeque,
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task::{Context, Poll},
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time::Duration,
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};
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use tracing::{debug, error};
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use crate::network::request_response::{AliceToBob, BobToAlice, Codec, Protocol, TIMEOUT};
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use xmr_btc::bob;
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#[derive(Debug)]
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pub enum OutEvent {
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Msg(bob::Message3),
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}
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/// A `NetworkBehaviour` that represents receiving of message 3 from Bob.
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#[derive(NetworkBehaviour)]
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#[behaviour(out_event = "OutEvent", poll_method = "poll")]
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#[allow(missing_debug_implementations)]
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pub struct Message3 {
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rr: RequestResponse<Codec>,
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#[behaviour(ignore)]
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events: VecDeque<OutEvent>,
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}
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impl Message3 {
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fn poll(
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&mut self,
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_: &mut Context<'_>,
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_: &mut impl PollParameters,
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) -> Poll<NetworkBehaviourAction<RequestProtocol<Codec>, OutEvent>> {
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if let Some(event) = self.events.pop_front() {
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return Poll::Ready(NetworkBehaviourAction::GenerateEvent(event));
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}
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Poll::Pending
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}
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}
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impl Default for Message3 {
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fn default() -> Self {
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let timeout = Duration::from_secs(TIMEOUT);
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let mut config = RequestResponseConfig::default();
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config.set_request_timeout(timeout);
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Self {
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rr: RequestResponse::new(
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Codec::default(),
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vec![(Protocol, ProtocolSupport::Full)],
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config,
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),
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events: Default::default(),
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}
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}
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}
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impl NetworkBehaviourEventProcess<RequestResponseEvent<BobToAlice, AliceToBob>> for Message3 {
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fn inject_event(&mut self, event: RequestResponseEvent<BobToAlice, AliceToBob>) {
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match event {
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RequestResponseEvent::Message {
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message:
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RequestResponseMessage::Request {
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request, channel, ..
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},
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..
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} => match request {
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BobToAlice::Message3(msg) => {
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self.events.push_back(OutEvent::Msg(msg));
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// Send back empty response so that the request/response protocol completes.
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self.rr.send_response(channel, AliceToBob::Message3);
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}
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other => debug!("got request: {:?}", other),
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},
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RequestResponseEvent::Message {
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message: RequestResponseMessage::Response { .. },
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..
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} => panic!("Alice should not get a Response"),
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RequestResponseEvent::InboundFailure { error, .. } => {
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error!("Inbound failure: {:?}", error);
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}
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RequestResponseEvent::OutboundFailure { error, .. } => {
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error!("Outbound failure: {:?}", error);
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}
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}
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}
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}
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@ -0,0 +1,84 @@
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use libp2p::{
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request_response::{
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handler::RequestProtocol, ProtocolSupport, RequestResponse, RequestResponseConfig,
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RequestResponseEvent, RequestResponseMessage,
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},
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swarm::{NetworkBehaviourAction, NetworkBehaviourEventProcess, PollParameters},
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NetworkBehaviour, PeerId,
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};
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use std::{
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task::{Context, Poll},
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time::Duration,
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};
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use tracing::{debug, error};
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use crate::{
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network::request_response::{AliceToBob, BobToAlice, Codec, Protocol, TIMEOUT},
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Never,
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};
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use xmr_btc::bob;
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/// A `NetworkBehaviour` that represents sending message 3 to Alice.
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#[derive(NetworkBehaviour)]
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#[behaviour(out_event = "Never", poll_method = "poll")]
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#[allow(missing_debug_implementations)]
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pub struct Message3 {
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rr: RequestResponse<Codec>,
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}
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impl Message3 {
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pub fn send(&mut self, alice: PeerId, msg: bob::Message3) {
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let msg = BobToAlice::Message3(msg);
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let _id = self.rr.send_request(&alice, msg);
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}
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// TODO: Do we need a custom implementation if we are not bubbling any out
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// events?
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fn poll(
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&mut self,
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_: &mut Context<'_>,
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_: &mut impl PollParameters,
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) -> Poll<NetworkBehaviourAction<RequestProtocol<Codec>, Never>> {
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Poll::Pending
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}
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}
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impl Default for Message3 {
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fn default() -> Self {
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let timeout = Duration::from_secs(TIMEOUT);
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let mut config = RequestResponseConfig::default();
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config.set_request_timeout(timeout);
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Self {
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rr: RequestResponse::new(
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Codec::default(),
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vec![(Protocol, ProtocolSupport::Full)],
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config,
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),
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}
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}
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}
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impl NetworkBehaviourEventProcess<RequestResponseEvent<BobToAlice, AliceToBob>> for Message3 {
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fn inject_event(&mut self, event: RequestResponseEvent<BobToAlice, AliceToBob>) {
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match event {
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RequestResponseEvent::Message {
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message: RequestResponseMessage::Request { .. },
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..
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} => panic!("Bob should never get a request from Alice"),
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RequestResponseEvent::Message {
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message: RequestResponseMessage::Response { response, .. },
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..
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} => match response {
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AliceToBob::Message3 => debug!("Alice correctly responded to message 3"),
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other => debug!("unexpected response: {:?}", other),
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},
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RequestResponseEvent::InboundFailure { error, .. } => {
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error!("Inbound failure: {:?}", error);
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}
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RequestResponseEvent::OutboundFailure { error, .. } => {
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error!("Outbound failure: {:?}", error);
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}
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}
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}
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}
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