WIP - outline the quote protocol refactoring
Similar to the spot price protocol changes. Missing: - Move the actual logic from ASB event loop to the added quote protocol. - Add a separate task that periodically updates the balance for spot price and quote!quote-protocol-refactor
Daniel Karzel
3 years ago
parent
593d5be77b
commit
de642e542f
@ -0,0 +1,153 @@
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use libp2p::{NetworkBehaviour, PeerId};
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use crate::network::quote::{BidQuote, BidQuoteProtocol};
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use crate::protocol::alice::event_loop::LatestRate;
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use std::collections::VecDeque;
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use libp2p::request_response::{RequestResponseConfig, ProtocolSupport, ResponseChannel};
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use crate::network::json_pull_codec::JsonPullCodec;
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use crate::monero;
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use std::task::{Context, Poll};
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use libp2p::swarm::{PollParameters, NetworkBehaviourAction, NetworkBehaviourEventProcess};
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use crate::protocol::alice;
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use crate::network::quote;
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#[derive(Debug)]
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pub enum OutEvent {
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QuoteSent {
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peer: PeerId,
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quote: BidQuote
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},
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Error {
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peer: PeerId,
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error: Error,
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},
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}
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#[derive(Debug, thiserror::Error)]
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pub enum Error {
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#[error("ASB is running in resume-only mode")]
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FailedToCreateQuote,
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#[error("Balance is {xmr_balance} which is insufficient to fulfill max buy of {max_buy} at price {price}")]
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InsufficientFunds {
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max_buy: bitcoin::Amount,
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price: bitcoin::Amount,
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xmr_balance: monero::Amount
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},
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}
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#[derive(NetworkBehaviour)]
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#[behaviour(out_event = "OutEvent", poll_method = "poll", event_process = true)]
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#[allow(missing_debug_implementations)]
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pub struct Behaviour<LR>
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where
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LR: LatestRate + Send + 'static,
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{
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behaviour: quote::Behaviour,
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#[behaviour(ignore)]
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events: VecDeque<OutEvent>,
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#[behaviour(ignore)]
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balance: monero::Amount,
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#[behaviour(ignore)]
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lock_fee: monero::Amount,
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#[behaviour(ignore)]
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max_buy: bitcoin::Amount,
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#[behaviour(ignore)]
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latest_rate: LR,
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#[behaviour(ignore)]
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resume_only: bool,
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}
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/// Behaviour that handles quotes
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/// All the logic how to react to a quote request is contained here, events
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/// reporting the successful handling of a quote request or a failure are
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/// bubbled up to the parent behaviour.
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impl<LR> Behaviour<LR>
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where
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LR: LatestRate + Send + 'static,
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{
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pub fn new(
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balance: monero::Amount,
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lock_fee: monero::Amount,
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max_buy: bitcoin::Amount,
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latest_rate: LR,
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resume_only: bool,
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) -> Self {
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Self {
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behaviour: quote::Behaviour::new(
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JsonPullCodec::default(),
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vec![(BidQuoteProtocol, ProtocolSupport::Inbound)],
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RequestResponseConfig::default(),
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),
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events: Default::default(),
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balance,
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lock_fee,
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max_buy,
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latest_rate,
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resume_only,
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}
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}
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pub fn update_balance(&mut self, balance: monero::Amount) {
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self.balance = balance;
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}
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fn decline(
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&mut self,
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peer: PeerId,
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channel: ResponseChannel<quote::Response>,
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error: Error,
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) {
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if self
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.behaviour
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.send_response(
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channel,
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quote::Response::Error,
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)
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.is_err()
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{
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tracing::debug!(%peer, "Unable to send error response for quote request");
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}
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self.events.push_back(OutEvent::Error { peer, error });
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}
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fn poll<BIE>(
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&mut self,
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_cx: &mut Context<'_>,
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_params: &mut impl PollParameters,
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) -> Poll<NetworkBehaviourAction<BIE, 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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// We trust in libp2p to poll us.
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Poll::Pending
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}
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}
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impl<LR> NetworkBehaviourEventProcess<quote::OutEvent> for Behaviour<LR>
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where
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LR: LatestRate + Send + 'static,
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{
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fn inject_event(&mut self, event: quote::OutEvent) {
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// TODO: Move the quote from the event loop into here
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todo!()
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}
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}
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impl From<OutEvent> for alice::OutEvent {
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fn from(event: OutEvent) -> Self {
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match event {
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OutEvent::QuoteSent { peer, quote } => {
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Self::QuoteSent { peer, quote }
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}
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OutEvent::Error { peer, error } => Self::QuoteError { peer, error },
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}
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}
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}
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// TODO: Add tests similar to spot price
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