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108 lines
3.5 KiB
108 lines
3.5 KiB
use crate::bitcoin::Signature;
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use crate::network::request_response::BUF_SIZE;
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use crate::protocol::alice::{Message1, Message3};
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use crate::protocol::bob::{State0, State2};
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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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use sigma_fun::ext::dl_secp256k1_ed25519_eq::CrossCurveDLEQProof;
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use std::sync::Arc;
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#[derive(Clone, Debug, Serialize, Deserialize)]
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pub struct Message0 {
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pub(crate) B: crate::bitcoin::PublicKey,
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pub(crate) S_b_monero: monero::PublicKey,
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pub(crate) S_b_bitcoin: crate::bitcoin::PublicKey,
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pub(crate) dleq_proof_s_b: CrossCurveDLEQProof,
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pub(crate) v_b: crate::monero::PrivateViewKey,
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pub(crate) refund_address: bitcoin::Address,
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}
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#[derive(Clone, Debug, Serialize, Deserialize)]
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pub struct Message2 {
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pub(crate) tx_lock: crate::bitcoin::TxLock,
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}
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#[derive(Clone, Debug, Serialize, Deserialize)]
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pub struct Message4 {
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pub(crate) tx_punish_sig: Signature,
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pub(crate) tx_cancel_sig: Signature,
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}
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#[derive(Debug)]
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pub enum OutEvent {
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Done(Result<State2>),
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}
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impl From<BehaviourOutEvent<(), State2, anyhow::Error>> for OutEvent {
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fn from(event: BehaviourOutEvent<(), State2, Error>) -> Self {
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match event {
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BehaviourOutEvent::Outbound(_, Ok(State2)) => OutEvent::Done(Ok(State2)),
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BehaviourOutEvent::Outbound(_, Err(e)) => OutEvent::Done(Err(e)),
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BehaviourOutEvent::Inbound(..) => unreachable!("Bob only supports outbound"),
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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<(), State2, 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"/comit/xmr/btc/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(
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&mut self,
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alice: PeerId,
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state0: State0,
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bitcoin_wallet: Arc<crate::bitcoin::Wallet>,
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) {
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self.inner
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.do_protocol_dialer(alice, move |mut substream| async move {
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tracing::debug!("Starting execution setup with {}", alice);
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substream
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.write_message(
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&serde_cbor::to_vec(&state0.next_message())
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.context("Failed to serialize message0")?,
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)
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.await?;
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let message1 =
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serde_cbor::from_slice::<Message1>(&substream.read_message(BUF_SIZE).await?)
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.context("Failed to deserialize message1")?;
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let state1 = state0.receive(bitcoin_wallet.as_ref(), message1).await?;
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substream
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.write_message(
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&serde_cbor::to_vec(&state1.next_message())
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.context("Failed to serialize message2")?,
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)
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.await?;
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let message3 =
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serde_cbor::from_slice::<Message3>(&substream.read_message(BUF_SIZE).await?)
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.context("Failed to deserialize message3")?;
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let state2 = state1.receive(message3)?;
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substream
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.write_message(
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&serde_cbor::to_vec(&state2.next_message())
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.context("Failed to serialize message4")?,
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)
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.await?;
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Ok(state2)
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})
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}
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}
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