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113 lines
3.6 KiB
113 lines
3.6 KiB
use crate::{
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bitcoin,
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bitcoin::{EncryptedSignature, Signature},
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monero,
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network::request_response::BUF_SIZE,
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protocol::{
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alice::{State0, State3},
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bob,
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},
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};
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use anyhow::{Context, Error, Result};
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use libp2p::PeerId;
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use libp2p_async_await::BehaviourOutEvent;
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use serde::{Deserialize, Serialize};
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#[derive(Clone, Debug, Serialize, Deserialize)]
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pub struct Message0 {
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pub(crate) A: bitcoin::PublicKey,
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pub(crate) S_a_monero: monero::PublicKey,
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pub(crate) S_a_bitcoin: bitcoin::PublicKey,
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pub(crate) dleq_proof_s_a: cross_curve_dleq::Proof,
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pub(crate) v_a: monero::PrivateViewKey,
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pub(crate) redeem_address: bitcoin::Address,
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pub(crate) punish_address: bitcoin::Address,
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}
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#[derive(Clone, Debug, Serialize, Deserialize)]
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pub struct Message1 {
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pub(crate) tx_cancel_sig: Signature,
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pub(crate) tx_refund_encsig: EncryptedSignature,
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}
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#[derive(Debug)]
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pub enum OutEvent {
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Done(Result<State3>),
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}
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impl From<BehaviourOutEvent<State3, (), anyhow::Error>> for OutEvent {
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fn from(event: BehaviourOutEvent<State3, (), Error>) -> Self {
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match event {
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BehaviourOutEvent::Inbound(_, Ok(State3)) => OutEvent::Done(Ok(State3)),
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BehaviourOutEvent::Inbound(_, Err(e)) => OutEvent::Done(Err(e)),
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BehaviourOutEvent::Outbound(..) => unreachable!("Alice only supports inbound"),
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}
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}
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}
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#[derive(libp2p::NetworkBehaviour)]
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#[behaviour(out_event = "OutEvent", event_process = false)]
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pub struct Behaviour {
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inner: libp2p_async_await::Behaviour<State3, (), anyhow::Error>,
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}
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impl Default for Behaviour {
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fn default() -> Self {
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Self {
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inner: libp2p_async_await::Behaviour::new(b"/execution_setup/1.0.0"),
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}
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}
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}
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impl Behaviour {
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pub fn run(&mut self, bob: PeerId, state0: State0) {
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self.inner
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.do_protocol_listener(bob, move |mut substream| async move {
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let alice_message0 = state0.next_message();
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let state1 = {
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let bob_message0 = serde_cbor::from_slice::<bob::Message0>(
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&substream.read_message(BUF_SIZE).await?,
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)
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.context("failed to deserialize message0")?;
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state0.receive(bob_message0)?
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};
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substream
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.write_message(
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&serde_cbor::to_vec(&alice_message0)
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.context("failed to serialize Message0")?,
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)
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.await?;
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let state2 = {
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let bob_message1 = serde_cbor::from_slice::<bob::Message1>(
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&substream.read_message(BUF_SIZE).await?,
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)
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.context("failed to deserialize message1")?;
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state1.receive(bob_message1)
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};
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{
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let alice_message2 = state2.next_message();
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substream
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.write_message(
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&serde_cbor::to_vec(&alice_message2)
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.context("failed to serialize Message2")?,
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)
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.await?;
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}
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let state3 = {
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let bob_message2 = serde_cbor::from_slice::<bob::Message2>(
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&substream.read_message(BUF_SIZE).await?,
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)
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.context("failed to deserialize message2")?;
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state2.receive(bob_message2)?
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};
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Ok(state3)
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})
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}
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}
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