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Merge pull request #30 from comit-network/use-execution-in-swap

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Execute on-chain protocol after handshake
This commit is contained in:
Lucas Soriano 2020-11-03 11:07:12 +11:00 committed by GitHub
commit 62c9f22b64
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27 changed files with 1113 additions and 291 deletions
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7
monero-harness/src/rpc/monerod.rs
View File

@ -6,12 +6,7 @@ use crate::{
use anyhow::Result;
use reqwest::Url;
use serde::{Deserialize, Serialize};
// #[cfg(not(test))]
// use tracing::debug;
//
// #[cfg(test)]
use std::eprintln as debug;
use tracing::debug;
/// RPC client for monerod and monero-wallet-rpc.
#[derive(Debug, Clone)]

4
monero-harness/src/rpc/wallet.rs
View File

@ -3,9 +3,7 @@ use crate::rpc::{Request, Response};
use anyhow::Result;
use reqwest::Url;
use serde::{Deserialize, Serialize};
// TODO: Either use println! directly or import tracing also?
use std::println as debug;
use tracing::debug;
/// JSON RPC client for monero-wallet-rpc.
#[derive(Debug)]

5
swap/Cargo.toml
View File

@ -12,13 +12,15 @@ atty = "0.2"
backoff = { version = "0.2", features = ["tokio"] }
base64 = "0.12"
bitcoin = { version = "0.23", features = ["rand", "use-serde"] } # TODO: Upgrade other crates in this repo to use this version.
bitcoin-harness = { git = "https://github.com/coblox/bitcoin-harness-rs", rev = "d402b36d3d6406150e3bfb71492ff4a0a7cb290e" }
bitcoin-harness = { git = "https://github.com/coblox/bitcoin-harness-rs", rev = "f1bbe6a4540d0741f1f4f22577cfeeadbfd7aaaf" }
derivative = "2"
futures = { version = "0.3", default-features = false }
genawaiter = "0.99.1"
libp2p = { version = "0.29", default-features = false, features = ["tcp-tokio", "yamux", "mplex", "dns", "noise", "request-response"] }
libp2p-tokio-socks5 = "0.4"
log = { version = "0.4", features = ["serde"] }
monero = "0.9"
monero-harness = { path = "../monero-harness" }
rand = "0.7"
reqwest = { version = "0.10", default-features = false, features = ["socks"] }
serde = { version = "1", features = ["derive"] }
@ -45,6 +47,7 @@ hyper = "0.13"
port_check = "0.1"
spectral = "0.6"
tempfile = "3"
testcontainers = "0.10"
[features]
default = []

238
swap/src/alice.rs
View File

@ -1,22 +1,30 @@
//! Run an XMR/BTC swap in the role of Alice.
//! Alice holds XMR and wishes receive BTC.
use anyhow::Result;
use async_trait::async_trait;
use backoff::{backoff::Constant as ConstantBackoff, future::FutureOperation as _};
use genawaiter::GeneratorState;
use libp2p::{
core::{identity::Keypair, Multiaddr},
request_response::ResponseChannel,
NetworkBehaviour, PeerId,
};
use rand::rngs::OsRng;
use std::thread;
use tracing::{debug, info};
use std::{sync::Arc, time::Duration};
use tokio::sync::Mutex;
use tracing::{debug, info, warn};
mod amounts;
mod message0;
mod message1;
mod message2;
mod message3;
use self::{amounts::*, message0::*, message1::*, message2::*};
use self::{amounts::*, message0::*, message1::*, message2::*, message3::*};
use crate::{
bitcoin,
bitcoin::TX_LOCK_MINE_TIMEOUT,
monero,
network::{
peer_tracker::{self, PeerTracker},
request_response::AliceToBob,
@ -24,32 +32,111 @@ use crate::{
},
SwapAmounts, PUNISH_TIMELOCK, REFUND_TIMELOCK,
};
use xmr_btc::{alice::State0, bob, monero};
pub type Swarm = libp2p::Swarm<Alice>;
use xmr_btc::{
alice::{self, action_generator, Action, ReceiveBitcoinRedeemEncsig, State0},
bitcoin::BroadcastSignedTransaction,
bob,
monero::{CreateWalletForOutput, Transfer},
};
pub async fn swap(
bitcoin_wallet: Arc<bitcoin::Wallet>,
monero_wallet: Arc<monero::Wallet>,
listen: Multiaddr,
local_port: Option<u16>,
redeem_address: ::bitcoin::Address,
punish_address: ::bitcoin::Address,
) -> Result<()> {
struct Network {
swarm: Arc<Mutex<Swarm>>,
channel: Option<ResponseChannel<AliceToBob>>,
}
impl Network {
pub async fn send_message2(&mut self, proof: monero::TransferProof) {
match self.channel.take() {
None => warn!("Channel not found, did you call this twice?"),
Some(channel) => {
let mut guard = self.swarm.lock().await;
guard.send_message2(channel, alice::Message2 {
tx_lock_proof: proof,
});
info!("Sent transfer proof");
}
}
}
}
// TODO: For retry, use `backoff::ExponentialBackoff` in production as opposed
// to `ConstantBackoff`.
#[async_trait]
impl ReceiveBitcoinRedeemEncsig for Network {
async fn receive_bitcoin_redeem_encsig(&mut self) -> xmr_btc::bitcoin::EncryptedSignature {
#[derive(Debug)]
struct UnexpectedMessage;
let encsig = (|| async {
let mut guard = self.swarm.lock().await;
let encsig = match guard.next().await {
OutEvent::Message3(msg) => msg.tx_redeem_encsig,
other => {
warn!("Expected Bob's Bitcoin redeem encsig, got: {:?}", other);
return Err(backoff::Error::Transient(UnexpectedMessage));
}
};
Result::<_, backoff::Error<UnexpectedMessage>>::Ok(encsig)
})
.retry(ConstantBackoff::new(Duration::from_secs(1)))
.await
.expect("transient errors to be retried");
info!("Received Bitcoin redeem encsig");
encsig
}
}
let mut swarm = new_swarm(listen, local_port)?;
let message0: bob::Message0;
let mut state0: Option<alice::State0> = None;
let mut last_amounts: Option<SwapAmounts> = None;
// TODO: This loop is a neat idea for local development, as it allows us to keep
// Alice up and let Bob keep trying to connect, request amounts and/or send the
// first message of the handshake, but it comes at the cost of needing to handle
// mutable state, which has already been the source of a bug at one point. This
// is an obvious candidate for refactoring
loop {
match swarm.next().await {
OutEvent::ConnectionEstablished(id) => {
info!("Connection established with: {}", id);
OutEvent::ConnectionEstablished(bob) => {
info!("Connection established with: {}", bob);
}
OutEvent::Request(amounts::OutEvent::Btc { btc, channel }) => {
debug!("Got request from Bob to swap {}", btc);
let amounts = calculate_amounts(btc);
// TODO: We cache the last amounts returned, this needs improving along with
// verification of message 0.
last_amounts = Some(amounts);
swarm.send_amounts(channel, amounts);
let SwapAmounts { btc, xmr } = amounts;
let redeem_address = bitcoin_wallet.as_ref().new_address().await?;
let punish_address = redeem_address.clone();
// TODO: Pass this in using <R: RngCore + CryptoRng>
let rng = &mut OsRng;
let state = State0::new(
rng,
btc,
xmr,
REFUND_TIMELOCK,
PUNISH_TIMELOCK,
redeem_address,
punish_address,
);
info!("Commencing handshake");
swarm.set_state0(state.clone());
state0 = Some(state)
}
OutEvent::Message0(msg) => {
// We don't want Bob to be able to crash us by sending an out of
@ -64,26 +151,7 @@ pub async fn swap(
};
}
let (xmr, btc) = match last_amounts {
Some(p) => (p.xmr, p.btc),
None => unreachable!("should have amounts by here"),
};
// TODO: Pass this in using <R: RngCore + CryptoRng>
let rng = &mut OsRng;
let state0 = State0::new(
rng,
btc,
xmr,
REFUND_TIMELOCK,
PUNISH_TIMELOCK,
redeem_address,
punish_address,
);
swarm.set_state0(state0.clone());
// TODO: Can we verify message 0 before calling this so we never fail?
let state1 = state0.receive(message0).expect("failed to receive msg 0");
let state1 = state0.expect("to be set").receive(message0)?;
let (state2, channel) = match swarm.next().await {
OutEvent::Message1 { msg, channel } => {
@ -96,17 +164,72 @@ pub async fn swap(
let msg = state2.next_message();
swarm.send_message1(channel, msg);
let _state3 = match swarm.next().await {
OutEvent::Message2(msg) => state2.receive(msg)?,
let (state3, channel) = match swarm.next().await {
OutEvent::Message2 { msg, channel } => {
let state3 = state2.receive(msg)?;
(state3, channel)
}
other => panic!("Unexpected event: {:?}", other),
};
info!("Handshake complete, we now have State3 for Alice.");
thread::park();
Ok(())
let network = Arc::new(Mutex::new(Network {
swarm: Arc::new(Mutex::new(swarm)),
channel: Some(channel),
}));
let mut action_generator = action_generator(
network.clone(),
bitcoin_wallet.clone(),
state3,
TX_LOCK_MINE_TIMEOUT,
);
loop {
let state = action_generator.async_resume().await;
tracing::info!("Resumed execution of generator, got: {:?}", state);
match state {
GeneratorState::Yielded(Action::LockXmr {
amount,
public_spend_key,
public_view_key,
}) => {
let (transfer_proof, _) = monero_wallet
.transfer(public_spend_key, public_view_key, amount)
.await?;
let mut guard = network.as_ref().lock().await;
guard.send_message2(transfer_proof).await;
info!("Sent transfer proof");
}
GeneratorState::Yielded(Action::RedeemBtc(tx)) => {
let _ = bitcoin_wallet.broadcast_signed_transaction(tx).await?;
}
GeneratorState::Yielded(Action::CancelBtc(tx)) => {
let _ = bitcoin_wallet.broadcast_signed_transaction(tx).await?;
}
GeneratorState::Yielded(Action::PunishBtc(tx)) => {
let _ = bitcoin_wallet.broadcast_signed_transaction(tx).await?;
}
GeneratorState::Yielded(Action::CreateMoneroWalletForOutput {
spend_key,
view_key,
}) => {
monero_wallet
.create_and_load_wallet_for_output(spend_key, view_key)
.await?;
}
GeneratorState::Complete(()) => return Ok(()),
}
}
}
pub type Swarm = libp2p::Swarm<Alice>;
fn new_swarm(listen: Multiaddr, port: Option<u16>) -> Result<Swarm> {
use anyhow::Context as _;
@ -155,7 +278,11 @@ pub enum OutEvent {
msg: bob::Message1,
channel: ResponseChannel<AliceToBob>,
},
Message2(bob::Message2),
Message2 {
msg: bob::Message2,
channel: ResponseChannel<AliceToBob>,
},
Message3(bob::Message3),
}
impl From<peer_tracker::OutEvent> for OutEvent {
@ -193,7 +320,15 @@ impl From<message1::OutEvent> for OutEvent {
impl From<message2::OutEvent> for OutEvent {
fn from(event: message2::OutEvent) -> Self {
match event {
message2::OutEvent::Msg(msg) => OutEvent::Message2(msg),
message2::OutEvent::Msg { msg, channel } => OutEvent::Message2 { msg, channel },
}
}
}
impl From<message3::OutEvent> for OutEvent {
fn from(event: message3::OutEvent) -> Self {
match event {
message3::OutEvent::Msg(msg) => OutEvent::Message3(msg),
}
}
}
@ -208,6 +343,7 @@ pub struct Alice {
message0: Message0,
message1: Message1,
message2: Message2,
message3: Message3,
#[behaviour(ignore)]
identity: Keypair,
}
@ -225,10 +361,12 @@ impl Alice {
pub fn send_amounts(&mut self, channel: ResponseChannel<AliceToBob>, amounts: SwapAmounts) {
let msg = AliceToBob::Amounts(amounts);
self.amounts.send(channel, msg);
info!("Sent amounts response");
}
/// Message0 gets sent within the network layer using this state0.
pub fn set_state0(&mut self, state: State0) {
debug!("Set state 0");
let _ = self.message0.set_state(state);
}
@ -238,7 +376,18 @@ impl Alice {
channel: ResponseChannel<AliceToBob>,
msg: xmr_btc::alice::Message1,
) {
self.message1.send(channel, msg)
self.message1.send(channel, msg);
debug!("Sent Message1");
}
/// Send Message2 to Bob in response to receiving his Message2.
pub fn send_message2(
&mut self,
channel: ResponseChannel<AliceToBob>,
msg: xmr_btc::alice::Message2,
) {
self.message2.send(channel, msg);
debug!("Sent Message2");
}
}
@ -252,17 +401,18 @@ impl Default for Alice {
message0: Message0::default(),
message1: Message1::default(),
message2: Message2::default(),
message3: Message3::default(),
identity,
}
}
}
fn calculate_amounts(btc: ::bitcoin::Amount) -> SwapAmounts {
const XMR_PER_BTC: u64 = 100; // TODO: Get this from an exchange.
// TODO: Get this from an exchange.
// This value corresponds to 100 XMR per BTC
const PICONERO_PER_SAT: u64 = 1_000_000;
// TODO: Check that this is correct.
// XMR uses 12 zerose BTC uses 8.
let picos = (btc.as_sat() * 10000) * XMR_PER_BTC;
let picos = btc.as_sat() * PICONERO_PER_SAT;
let xmr = monero::Amount::from_piconero(picos);
SwapAmounts { btc, xmr }

35
swap/src/alice/amounts.rs
View File

@ -1,11 +1,10 @@
use anyhow::Result;
use libp2p::{
request_response::{
handler::RequestProtocol, ProtocolSupport, RequestId, RequestResponse,
RequestResponseConfig, RequestResponseEvent, RequestResponseMessage, ResponseChannel,
handler::RequestProtocol, ProtocolSupport, RequestResponse, RequestResponseConfig,
RequestResponseEvent, RequestResponseMessage, ResponseChannel,
},
swarm::{NetworkBehaviourAction, NetworkBehaviourEventProcess, PollParameters},
NetworkBehaviour, PeerId,
NetworkBehaviour,
};
use std::{
collections::VecDeque,
@ -14,7 +13,7 @@ use std::{
};
use tracing::{debug, error};
use crate::network::request_response::{AliceToBob, BobToAlice, Codec, Protocol, TIMEOUT};
use crate::network::request_response::{AliceToBob, AmountsProtocol, BobToAlice, Codec, TIMEOUT};
#[derive(Debug)]
pub enum OutEvent {
@ -29,7 +28,7 @@ pub enum OutEvent {
#[behaviour(out_event = "OutEvent", poll_method = "poll")]
#[allow(missing_debug_implementations)]
pub struct Amounts {
rr: RequestResponse<Codec>,
rr: RequestResponse<Codec<AmountsProtocol>>,
#[behaviour(ignore)]
events: VecDeque<OutEvent>,
}
@ -40,23 +39,11 @@ impl Amounts {
self.rr.send_response(channel, msg);
}
pub async fn request_amounts(
&mut self,
alice: PeerId,
btc: ::bitcoin::Amount,
) -> Result<RequestId> {
let msg = BobToAlice::AmountsFromBtc(btc);
let id = self.rr.send_request(&alice, msg);
debug!("Request sent to: {}", alice);
Ok(id)
}
fn poll(
&mut self,
_: &mut Context<'_>,
_: &mut impl PollParameters,
) -> Poll<NetworkBehaviourAction<RequestProtocol<Codec>, OutEvent>> {
) -> Poll<NetworkBehaviourAction<RequestProtocol<Codec<AmountsProtocol>>, OutEvent>> {
if let Some(event) = self.events.pop_front() {
return Poll::Ready(NetworkBehaviourAction::GenerateEvent(event));
}
@ -75,7 +62,7 @@ impl Default for Amounts {
Self {
rr: RequestResponse::new(
Codec::default(),
vec![(Protocol, ProtocolSupport::Full)],
vec![(AmountsProtocol, ProtocolSupport::Full)],
config,
),
events: Default::default(),
@ -92,12 +79,12 @@ impl NetworkBehaviourEventProcess<RequestResponseEvent<BobToAlice, AliceToBob>>
request, channel, ..
},
..
} => match request {
BobToAlice::AmountsFromBtc(btc) => {
} => {
if let BobToAlice::AmountsFromBtc(btc) = request {
debug!("Received amounts request");
self.events.push_back(OutEvent::Btc { btc, channel })
}
other => debug!("got request: {:?}", other),
},
}
RequestResponseEvent::Message {
message: RequestResponseMessage::Response { .. },
..

18
swap/src/alice/message0.rs
View File

@ -15,7 +15,7 @@ use std::{
};
use tracing::{debug, error};
use crate::network::request_response::{AliceToBob, BobToAlice, Codec, Protocol, TIMEOUT};
use crate::network::request_response::{AliceToBob, BobToAlice, Codec, Message0Protocol, TIMEOUT};
use xmr_btc::{alice::State0, bob};
#[derive(Debug)]
@ -28,7 +28,7 @@ pub enum OutEvent {
#[behaviour(out_event = "OutEvent", poll_method = "poll")]
#[allow(missing_debug_implementations)]
pub struct Message0 {
rr: RequestResponse<Codec>,
rr: RequestResponse<Codec<Message0Protocol>>,
#[behaviour(ignore)]
events: VecDeque<OutEvent>,
#[behaviour(ignore)]
@ -49,7 +49,7 @@ impl Message0 {
&mut self,
_: &mut Context<'_>,
_: &mut impl PollParameters,
) -> Poll<NetworkBehaviourAction<RequestProtocol<Codec>, OutEvent>> {
) -> Poll<NetworkBehaviourAction<RequestProtocol<Codec<Message0Protocol>>, OutEvent>> {
if let Some(event) = self.events.pop_front() {
return Poll::Ready(NetworkBehaviourAction::GenerateEvent(event));
}
@ -67,7 +67,7 @@ impl Default for Message0 {
Self {
rr: RequestResponse::new(
Codec::default(),
vec![(Protocol, ProtocolSupport::Full)],
vec![(Message0Protocol, ProtocolSupport::Full)],
config,
),
events: Default::default(),
@ -85,8 +85,9 @@ impl NetworkBehaviourEventProcess<RequestResponseEvent<BobToAlice, AliceToBob>>
request, channel, ..
},
..
} => match request {
BobToAlice::Message0(msg) => {
} => {
if let BobToAlice::Message0(msg) = request {
debug!("Received Message0");
let response = match &self.state {
None => panic!("No state, did you forget to set it?"),
Some(state) => {
@ -95,10 +96,11 @@ impl NetworkBehaviourEventProcess<RequestResponseEvent<BobToAlice, AliceToBob>>
}
};
self.rr.send_response(channel, response);
debug!("Sent Message0");
self.events.push_back(OutEvent::Msg(msg));
}
other => debug!("got request: {:?}", other),
},
}
RequestResponseEvent::Message {
message: RequestResponseMessage::Response { .. },
..

16
swap/src/alice/message1.rs
View File

@ -13,7 +13,7 @@ use std::{
};
use tracing::{debug, error};
use crate::network::request_response::{AliceToBob, BobToAlice, Codec, Protocol, TIMEOUT};
use crate::network::request_response::{AliceToBob, BobToAlice, Codec, Message1Protocol, TIMEOUT};
use xmr_btc::bob;
#[derive(Debug)]
@ -31,7 +31,7 @@ pub enum OutEvent {
#[behaviour(out_event = "OutEvent", poll_method = "poll")]
#[allow(missing_debug_implementations)]
pub struct Message1 {
rr: RequestResponse<Codec>,
rr: RequestResponse<Codec<Message1Protocol>>,
#[behaviour(ignore)]
events: VecDeque<OutEvent>,
}
@ -46,7 +46,7 @@ impl Message1 {
&mut self,
_: &mut Context<'_>,
_: &mut impl PollParameters,
) -> Poll<NetworkBehaviourAction<RequestProtocol<Codec>, OutEvent>> {
) -> Poll<NetworkBehaviourAction<RequestProtocol<Codec<Message1Protocol>>, OutEvent>> {
if let Some(event) = self.events.pop_front() {
return Poll::Ready(NetworkBehaviourAction::GenerateEvent(event));
}
@ -64,7 +64,7 @@ impl Default for Message1 {
Self {
rr: RequestResponse::new(
Codec::default(),
vec![(Protocol, ProtocolSupport::Full)],
vec![(Message1Protocol, ProtocolSupport::Full)],
config,
),
events: Default::default(),
@ -81,12 +81,12 @@ impl NetworkBehaviourEventProcess<RequestResponseEvent<BobToAlice, AliceToBob>>
request, channel, ..
},
..
} => match request {
BobToAlice::Message1(msg) => {
} => {
if let BobToAlice::Message1(msg) = request {
debug!("Received Message1");
self.events.push_back(OutEvent::Msg { msg, channel });
}
other => debug!("got request: {:?}", other),
},
}
RequestResponseEvent::Message {
message: RequestResponseMessage::Response { .. },
..

28
swap/src/alice/message2.rs
View File

@ -13,12 +13,17 @@ use std::{
};
use tracing::{debug, error};
use crate::network::request_response::{AliceToBob, BobToAlice, Codec, Protocol, TIMEOUT};
use crate::network::request_response::{AliceToBob, BobToAlice, Codec, Message2Protocol, TIMEOUT};
use xmr_btc::bob;
#[derive(Debug)]
pub enum OutEvent {
Msg(bob::Message2),
Msg {
/// Received message from Bob.
msg: bob::Message2,
/// Channel to send back Alice's message 2.
channel: ResponseChannel<AliceToBob>,
},
}
/// A `NetworkBehaviour` that represents receiving of message 2 from Bob.
@ -26,7 +31,7 @@ pub enum OutEvent {
#[behaviour(out_event = "OutEvent", poll_method = "poll")]
#[allow(missing_debug_implementations)]
pub struct Message2 {
rr: RequestResponse<Codec>,
rr: RequestResponse<Codec<Message2Protocol>>,
#[behaviour(ignore)]
events: VecDeque<OutEvent>,
}
@ -41,7 +46,7 @@ impl Message2 {
&mut self,
_: &mut Context<'_>,
_: &mut impl PollParameters,
) -> Poll<NetworkBehaviourAction<RequestProtocol<Codec>, OutEvent>> {
) -> Poll<NetworkBehaviourAction<RequestProtocol<Codec<Message2Protocol>>, OutEvent>> {
if let Some(event) = self.events.pop_front() {
return Poll::Ready(NetworkBehaviourAction::GenerateEvent(event));
}
@ -59,7 +64,7 @@ impl Default for Message2 {
Self {
rr: RequestResponse::new(
Codec::default(),
vec![(Protocol, ProtocolSupport::Full)],
vec![(Message2Protocol, ProtocolSupport::Full)],
config,
),
events: Default::default(),
@ -76,15 +81,12 @@ impl NetworkBehaviourEventProcess<RequestResponseEvent<BobToAlice, AliceToBob>>
request, channel, ..
},
..
} => match request {
BobToAlice::Message2(msg) => {
self.events.push_back(OutEvent::Msg(msg));
// Send back empty response so that the request/response protocol completes.
let msg = AliceToBob::EmptyResponse;
self.rr.send_response(channel, msg);
} => {
if let BobToAlice::Message2(msg) = request {
debug!("Received Message2");
self.events.push_back(OutEvent::Msg { msg, channel });
}
other => debug!("got request: {:?}", other),
},
}
RequestResponseEvent::Message {
message: RequestResponseMessage::Response { .. },
..

94
swap/src/alice/message3.rs Normal file
View File

@ -0,0 +1,94 @@
use libp2p::{
request_response::{
handler::RequestProtocol, ProtocolSupport, RequestResponse, RequestResponseConfig,
RequestResponseEvent, RequestResponseMessage,
},
swarm::{NetworkBehaviourAction, NetworkBehaviourEventProcess, PollParameters},
NetworkBehaviour,
};
use std::{
collections::VecDeque,
task::{Context, Poll},
time::Duration,
};
use tracing::{debug, error};
use crate::network::request_response::{AliceToBob, BobToAlice, Codec, Message3Protocol, TIMEOUT};
use xmr_btc::bob;
#[derive(Debug)]
pub enum OutEvent {
Msg(bob::Message3),
}
/// A `NetworkBehaviour` that represents receiving of message 3 from Bob.
#[derive(NetworkBehaviour)]
#[behaviour(out_event = "OutEvent", poll_method = "poll")]
#[allow(missing_debug_implementations)]
pub struct Message3 {
rr: RequestResponse<Codec<Message3Protocol>>,
#[behaviour(ignore)]
events: VecDeque<OutEvent>,
}
impl Message3 {
fn poll(
&mut self,
_: &mut Context<'_>,
_: &mut impl PollParameters,
) -> Poll<NetworkBehaviourAction<RequestProtocol<Codec<Message3Protocol>>, OutEvent>> {
if let Some(event) = self.events.pop_front() {
return Poll::Ready(NetworkBehaviourAction::GenerateEvent(event));
}
Poll::Pending
}
}
impl Default for Message3 {
fn default() -> Self {
let timeout = Duration::from_secs(TIMEOUT);
let mut config = RequestResponseConfig::default();
config.set_request_timeout(timeout);
Self {
rr: RequestResponse::new(
Codec::default(),
vec![(Message3Protocol, ProtocolSupport::Full)],
config,
),
events: Default::default(),
}
}
}
impl NetworkBehaviourEventProcess<RequestResponseEvent<BobToAlice, AliceToBob>> for Message3 {
fn inject_event(&mut self, event: RequestResponseEvent<BobToAlice, AliceToBob>) {
match event {
RequestResponseEvent::Message {
message:
RequestResponseMessage::Request {
request, channel, ..
},
..
} => {
if let BobToAlice::Message3(msg) = request {
debug!("Received Message3");
self.events.push_back(OutEvent::Msg(msg));
// Send back empty response so that the request/response protocol completes.
self.rr.send_response(channel, AliceToBob::Message3);
}
}
RequestResponseEvent::Message {
message: RequestResponseMessage::Response { .. },
..
} => panic!("Alice should not get a Response"),
RequestResponseEvent::InboundFailure { error, .. } => {
error!("Inbound failure: {:?}", error);
}
RequestResponseEvent::OutboundFailure { error, .. } => {
error!("Outbound failure: {:?}", error);
}
}
}
}

81
swap/src/bitcoin.rs
View File

@ -1,14 +1,19 @@
use std::time::Duration;
use anyhow::Result;
use async_trait::async_trait;
use backoff::{future::FutureOperation as _, ExponentialBackoff};
use backoff::{backoff::Constant as ConstantBackoff, future::FutureOperation as _};
use bitcoin::{util::psbt::PartiallySignedTransaction, Address, Transaction};
use bitcoin_harness::bitcoind_rpc::PsbtBase64;
use bitcoin_harness::{bitcoind_rpc::PsbtBase64, Bitcoind};
use reqwest::Url;
use tokio::time;
use xmr_btc::bitcoin::{
Amount, BroadcastSignedTransaction, BuildTxLockPsbt, SignTxLock, TxLock, Txid,
WatchForRawTransaction,
Amount, BlockHeight, BroadcastSignedTransaction, BuildTxLockPsbt, SignTxLock,
TransactionBlockHeight, TxLock, Txid, WatchForRawTransaction,
};
pub const TX_LOCK_MINE_TIMEOUT: u64 = 3600;
// This is cut'n'paste from xmr_btc/tests/harness/wallet/bitcoin.rs
#[derive(Debug)]
@ -41,6 +46,22 @@ impl Wallet {
}
}
pub async fn make_wallet(
name: &str,
bitcoind: &Bitcoind<'_>,
fund_amount: Amount,
) -> Result<Wallet> {
let wallet = Wallet::new(name, &bitcoind.node_url).await?;
let buffer = Amount::from_btc(1.0).unwrap();
let amount = fund_amount + buffer;
let address = wallet.0.new_address().await.unwrap();
bitcoind.mint(address, amount).await.unwrap();
Ok(wallet)
}
#[async_trait]
impl BuildTxLockPsbt for Wallet {
async fn build_tx_lock_psbt(
@ -81,19 +102,63 @@ impl SignTxLock for Wallet {
impl BroadcastSignedTransaction for Wallet {
async fn broadcast_signed_transaction(&self, transaction: Transaction) -> Result<Txid> {
let txid = self.0.send_raw_transaction(transaction).await?;
// TODO: Instead of guessing how long it will take for the transaction to be
// mined we should ask bitcoind for the number of confirmations on `txid`
// give time for transaction to be mined
time::delay_for(Duration::from_millis(1100)).await;
Ok(txid)
}
}
// TODO: For retry, use `backoff::ExponentialBackoff` in production as opposed
// to `ConstantBackoff`.
#[async_trait]
impl WatchForRawTransaction for Wallet {
async fn watch_for_raw_transaction(&self, txid: Txid) -> Transaction {
(|| async { Ok(self.0.get_raw_transaction(txid).await?) })
.retry(ExponentialBackoff {
max_elapsed_time: None,
..Default::default()
})
.retry(ConstantBackoff::new(Duration::from_secs(1)))
.await
.expect("transient errors to be retried")
}
}
#[async_trait]
impl BlockHeight for Wallet {
async fn block_height(&self) -> u32 {
(|| async { Ok(self.0.block_height().await?) })
.retry(ConstantBackoff::new(Duration::from_secs(1)))
.await
.expect("transient errors to be retried")
}
}
#[async_trait]
impl TransactionBlockHeight for Wallet {
async fn transaction_block_height(&self, txid: Txid) -> u32 {
#[derive(Debug)]
enum Error {
Io,
NotYetMined,
}
(|| async {
let block_height = self
.0
.transaction_block_height(txid)
.await
.map_err(|_| backoff::Error::Transient(Error::Io))?;
let block_height =
block_height.ok_or_else(|| backoff::Error::Transient(Error::NotYetMined))?;
Result::<_, backoff::Error<Error>>::Ok(block_height)
})
.retry(ConstantBackoff::new(Duration::from_secs(1)))
.await
.expect("transient errors to be retried")
}
}

188
swap/src/bob.rs
View File

@ -1,46 +1,85 @@
//! Run an XMR/BTC swap in the role of Bob.
//! Bob holds BTC and wishes receive XMR.
use anyhow::Result;
use async_trait::async_trait;
use backoff::{backoff::Constant as ConstantBackoff, future::FutureOperation as _};
use futures::{
channel::mpsc::{Receiver, Sender},
StreamExt,
FutureExt, StreamExt,
};
use genawaiter::GeneratorState;
use libp2p::{core::identity::Keypair, Multiaddr, NetworkBehaviour, PeerId};
use rand::rngs::OsRng;
use std::{process, thread};
use tracing::{debug, info};
use std::{process, sync::Arc, time::Duration};
use tokio::sync::Mutex;
use tracing::{debug, info, warn};
mod amounts;
mod message0;
mod message1;
mod message2;
mod message3;
use self::{amounts::*, message0::*, message1::*, message2::*};
use self::{amounts::*, message0::*, message1::*, message2::*, message3::*};
use crate::{
bitcoin,
bitcoin::TX_LOCK_MINE_TIMEOUT,
monero,
network::{
peer_tracker::{self, PeerTracker},
transport, TokioExecutor,
},
Cmd, Never, Rsp, SwapAmounts, PUNISH_TIMELOCK, REFUND_TIMELOCK,
Cmd, Rsp, SwapAmounts, PUNISH_TIMELOCK, REFUND_TIMELOCK,
};
use xmr_btc::{
alice,
bitcoin::{BroadcastSignedTransaction, BuildTxLockPsbt, SignTxLock},
bob::{self, State0},
bitcoin::{BroadcastSignedTransaction, EncryptedSignature, SignTxLock},
bob::{self, action_generator, ReceiveTransferProof, State0},
monero::CreateWalletForOutput,
};
// FIXME: This whole function is horrible, needs total re-write.
pub async fn swap<W>(
pub async fn swap(
bitcoin_wallet: Arc<bitcoin::Wallet>,
monero_wallet: Arc<monero::Wallet>,
btc: u64,
addr: Multiaddr,
mut cmd_tx: Sender<Cmd>,
mut rsp_rx: Receiver<Rsp>,
refund_address: ::bitcoin::Address,
wallet: W,
) -> Result<()>
where
W: BuildTxLockPsbt + SignTxLock + BroadcastSignedTransaction + Send + Sync + 'static,
{
) -> Result<()> {
struct Network(Swarm);
// TODO: For retry, use `backoff::ExponentialBackoff` in production as opposed
// to `ConstantBackoff`.
#[async_trait]
impl ReceiveTransferProof for Network {
async fn receive_transfer_proof(&mut self) -> monero::TransferProof {
#[derive(Debug)]
struct UnexpectedMessage;
let future = self.0.next().shared();
let proof = (|| async {
let proof = match future.clone().await {
OutEvent::Message2(msg) => msg.tx_lock_proof,
other => {
warn!("Expected transfer proof, got: {:?}", other);
return Err(backoff::Error::Transient(UnexpectedMessage));
}
};
Result::<_, backoff::Error<UnexpectedMessage>>::Ok(proof)
})
.retry(ConstantBackoff::new(Duration::from_secs(1)))
.await
.expect("transient errors to be retried");
info!("Received transfer proof");
proof
}
}
let mut swarm = new_swarm()?;
libp2p::Swarm::dial_addr(&mut swarm, addr)?;
@ -48,27 +87,29 @@ where
OutEvent::ConnectionEstablished(alice) => alice,
other => panic!("unexpected event: {:?}", other),
};
info!("Connection established.");
info!("Connection established with: {}", alice);
swarm.request_amounts(alice.clone(), btc);
let (btc, xmr) = match swarm.next().await {
OutEvent::Amounts(amounts) => {
debug!("Got amounts from Alice: {:?}", amounts);
info!("Got amounts from Alice: {:?}", amounts);
let cmd = Cmd::VerifyAmounts(amounts);
cmd_tx.try_send(cmd)?;
let response = rsp_rx.next().await;
if response == Some(Rsp::Abort) {
info!("Amounts no good, aborting ...");
info!("User rejected amounts proposed by Alice, aborting...");
process::exit(0);
}
info!("User verified amounts, continuing with swap ...");
info!("User accepted amounts proposed by Alice");
(amounts.btc, amounts.xmr)
}
other => panic!("unexpected event: {:?}", other),
};
let refund_address = bitcoin_wallet.new_address().await?;
// TODO: Pass this in using <R: RngCore + CryptoRng>
let rng = &mut OsRng;
let state0 = State0::new(
@ -80,13 +121,11 @@ where
refund_address,
);
info!("Commencing handshake");
swarm.send_message0(alice.clone(), state0.next_message(rng));
let state1 = match swarm.next().await {
OutEvent::Message0(msg) => {
// TODO: Verify the response message before calling receive() and handle any
// error gracefully.
state0.receive(&wallet, msg).await?
}
OutEvent::Message0(msg) => state0.receive(bitcoin_wallet.as_ref(), msg).await?,
other => panic!("unexpected event: {:?}", other),
};
@ -100,10 +139,65 @@ where
swarm.send_message2(alice.clone(), state2.next_message());
info!("Handshake complete, we now have State2 for Bob.");
info!("Handshake complete");
thread::park();
Ok(())
let network = Arc::new(Mutex::new(Network(swarm)));
let mut action_generator = action_generator(
network.clone(),
monero_wallet.clone(),
bitcoin_wallet.clone(),
state2,
TX_LOCK_MINE_TIMEOUT,
);
loop {
let state = action_generator.async_resume().await;
info!("Resumed execution of generator, got: {:?}", state);
match state {
GeneratorState::Yielded(bob::Action::LockBtc(tx_lock)) => {
let signed_tx_lock = bitcoin_wallet.sign_tx_lock(tx_lock).await?;
let _ = bitcoin_wallet
.broadcast_signed_transaction(signed_tx_lock)
.await?;
}
GeneratorState::Yielded(bob::Action::SendBtcRedeemEncsig(tx_redeem_encsig)) => {
let mut guard = network.as_ref().lock().await;
guard.0.send_message3(alice.clone(), tx_redeem_encsig);
info!("Sent Bitcoin redeem encsig");
// TODO: Does Bob need to wait for Alice to send an empty response, or can we
// just continue?
match guard.0.next().shared().await {
OutEvent::Message3 => {
debug!("Got Message3 empty response");
}
other => panic!("unexpected event: {:?}", other),
};
}
GeneratorState::Yielded(bob::Action::CreateXmrWalletForOutput {
spend_key,
view_key,
}) => {
monero_wallet
.create_and_load_wallet_for_output(spend_key, view_key)
.await?;
}
GeneratorState::Yielded(bob::Action::CancelBtc(tx_cancel)) => {
let _ = bitcoin_wallet
.broadcast_signed_transaction(tx_cancel)
.await?;
}
GeneratorState::Yielded(bob::Action::RefundBtc(tx_refund)) => {
let _ = bitcoin_wallet
.broadcast_signed_transaction(tx_refund)
.await?;
}
GeneratorState::Complete(()) => return Ok(()),
}
}
}
pub type Swarm = libp2p::Swarm<Bob>;
@ -137,12 +231,14 @@ fn new_swarm() -> Result<Swarm> {
}
#[allow(clippy::large_enum_variant)]
#[derive(Debug)]
#[derive(Debug, Clone)]
pub enum OutEvent {
ConnectionEstablished(PeerId),
Amounts(SwapAmounts),
Message0(alice::Message0),
Message1(alice::Message1),
Message2(alice::Message2),
Message3,
}
impl From<peer_tracker::OutEvent> for OutEvent {
@ -179,9 +275,19 @@ impl From<message1::OutEvent> for OutEvent {
}
}
impl From<Never> for OutEvent {
fn from(_: Never) -> Self {
panic!("this never happens")
impl From<message2::OutEvent> for OutEvent {
fn from(event: message2::OutEvent) -> Self {
match event {
message2::OutEvent::Msg(msg) => OutEvent::Message2(msg),
}
}
}
impl From<message3::OutEvent> for OutEvent {
fn from(event: message3::OutEvent) -> Self {
match event {
message3::OutEvent::Msg => OutEvent::Message3,
}
}
}
@ -195,6 +301,7 @@ pub struct Bob {
message0: Message0,
message1: Message1,
message2: Message2,
message3: Message3,
#[behaviour(ignore)]
identity: Keypair,
}
@ -212,22 +319,32 @@ impl Bob {
pub fn request_amounts(&mut self, alice: PeerId, btc: u64) {
let btc = ::bitcoin::Amount::from_sat(btc);
let _id = self.amounts.request_amounts(alice.clone(), btc);
debug!("Requesting amounts from: {}", alice);
info!("Requesting amounts from: {}", alice);
}
/// Sends Bob's first message to Alice.
pub fn send_message0(&mut self, alice: PeerId, msg: bob::Message0) {
self.message0.send(alice, msg)
self.message0.send(alice, msg);
debug!("Sent Message0");
}
/// Sends Bob's second message to Alice.
pub fn send_message1(&mut self, alice: PeerId, msg: bob::Message1) {
self.message1.send(alice, msg)
self.message1.send(alice, msg);
debug!("Sent Message1");
}
/// Sends Bob's third message to Alice.
pub fn send_message2(&mut self, alice: PeerId, msg: bob::Message2) {
self.message2.send(alice, msg)
self.message2.send(alice, msg);
debug!("Sent Message2");
}
/// Sends Bob's fourth message to Alice.
pub fn send_message3(&mut self, alice: PeerId, tx_redeem_encsig: EncryptedSignature) {
let msg = bob::Message3 { tx_redeem_encsig };
self.message3.send(alice, msg);
debug!("Sent Message3");
}
/// Returns Alice's peer id if we are connected.
@ -246,6 +363,7 @@ impl Default for Bob {
message0: Message0::default(),
message1: Message1::default(),
message2: Message2::default(),
message3: Message3::default(),
identity,
}
}

18
swap/src/bob/amounts.rs
View File

@ -15,7 +15,7 @@ use std::{
use tracing::{debug, error};
use crate::{
network::request_response::{AliceToBob, BobToAlice, Codec, Protocol, TIMEOUT},
network::request_response::{AliceToBob, AmountsProtocol, BobToAlice, Codec, TIMEOUT},
SwapAmounts,
};
@ -29,7 +29,7 @@ pub enum OutEvent {
#[behaviour(out_event = "OutEvent", poll_method = "poll")]
#[allow(missing_debug_implementations)]
pub struct Amounts {
rr: RequestResponse<Codec>,
rr: RequestResponse<Codec<AmountsProtocol>>,
#[behaviour(ignore)]
events: VecDeque<OutEvent>,
}
@ -46,7 +46,7 @@ impl Amounts {
&mut self,
_: &mut Context<'_>,
_: &mut impl PollParameters,
) -> Poll<NetworkBehaviourAction<RequestProtocol<Codec>, OutEvent>> {
) -> Poll<NetworkBehaviourAction<RequestProtocol<Codec<AmountsProtocol>>, OutEvent>> {
if let Some(event) = self.events.pop_front() {
return Poll::Ready(NetworkBehaviourAction::GenerateEvent(event));
}
@ -65,7 +65,7 @@ impl Default for Amounts {
Self {
rr: RequestResponse::new(
Codec::default(),
vec![(Protocol, ProtocolSupport::Full)],
vec![(AmountsProtocol, ProtocolSupport::Full)],
config,
),
events: Default::default(),
@ -83,10 +83,12 @@ impl NetworkBehaviourEventProcess<RequestResponseEvent<BobToAlice, AliceToBob>>
RequestResponseEvent::Message {
message: RequestResponseMessage::Response { response, .. },
..
} => match response {
AliceToBob::Amounts(p) => self.events.push_back(OutEvent::Amounts(p)),
other => debug!("got response: {:?}", other),
},
} => {
if let AliceToBob::Amounts(p) = response {
debug!("Received amounts response");
self.events.push_back(OutEvent::Amounts(p));
}
}
RequestResponseEvent::InboundFailure { error, .. } => {
error!("Inbound failure: {:?}", error);
}

18
swap/src/bob/message0.rs
View File

@ -13,7 +13,7 @@ use std::{
};
use tracing::{debug, error};
use crate::network::request_response::{AliceToBob, BobToAlice, Codec, Protocol, TIMEOUT};
use crate::network::request_response::{AliceToBob, BobToAlice, Codec, Message0Protocol, TIMEOUT};
use xmr_btc::{alice, bob};
#[derive(Debug)]
@ -26,7 +26,7 @@ pub enum OutEvent {
#[behaviour(out_event = "OutEvent", poll_method = "poll")]
#[allow(missing_debug_implementations)]
pub struct Message0 {
rr: RequestResponse<Codec>,
rr: RequestResponse<Codec<Message0Protocol>>,
#[behaviour(ignore)]
events: VecDeque<OutEvent>,
}
@ -41,7 +41,7 @@ impl Message0 {
&mut self,
_: &mut Context<'_>,
_: &mut impl PollParameters,
) -> Poll<NetworkBehaviourAction<RequestProtocol<Codec>, OutEvent>> {
) -> Poll<NetworkBehaviourAction<RequestProtocol<Codec<Message0Protocol>>, OutEvent>> {
if let Some(event) = self.events.pop_front() {
return Poll::Ready(NetworkBehaviourAction::GenerateEvent(event));
}
@ -59,7 +59,7 @@ impl Default for Message0 {
Self {
rr: RequestResponse::new(
Codec::default(),
vec![(Protocol, ProtocolSupport::Full)],
vec![(Message0Protocol, ProtocolSupport::Full)],
config,
),
events: Default::default(),
@ -77,10 +77,12 @@ impl NetworkBehaviourEventProcess<RequestResponseEvent<BobToAlice, AliceToBob>>
RequestResponseEvent::Message {
message: RequestResponseMessage::Response { response, .. },
..
} => match response {
AliceToBob::Message0(msg) => self.events.push_back(OutEvent::Msg(msg)),
other => debug!("got response: {:?}", other),
},
} => {
if let AliceToBob::Message0(msg) = response {
debug!("Received Message0");
self.events.push_back(OutEvent::Msg(msg));
}
}
RequestResponseEvent::InboundFailure { error, .. } => {
error!("Inbound failure: {:?}", error);
}

18
swap/src/bob/message1.rs
View File

@ -13,7 +13,7 @@ use std::{
};
use tracing::{debug, error};
use crate::network::request_response::{AliceToBob, BobToAlice, Codec, Protocol, TIMEOUT};
use crate::network::request_response::{AliceToBob, BobToAlice, Codec, Message1Protocol, TIMEOUT};
use xmr_btc::{alice, bob};
#[derive(Debug)]
@ -26,7 +26,7 @@ pub enum OutEvent {
#[behaviour(out_event = "OutEvent", poll_method = "poll")]
#[allow(missing_debug_implementations)]
pub struct Message1 {
rr: RequestResponse<Codec>,
rr: RequestResponse<Codec<Message1Protocol>>,
#[behaviour(ignore)]
events: VecDeque<OutEvent>,
}
@ -41,7 +41,7 @@ impl Message1 {
&mut self,
_: &mut Context<'_>,
_: &mut impl PollParameters,
) -> Poll<NetworkBehaviourAction<RequestProtocol<Codec>, OutEvent>> {
) -> Poll<NetworkBehaviourAction<RequestProtocol<Codec<Message1Protocol>>, OutEvent>> {
if let Some(event) = self.events.pop_front() {
return Poll::Ready(NetworkBehaviourAction::GenerateEvent(event));
}
@ -59,7 +59,7 @@ impl Default for Message1 {
Self {
rr: RequestResponse::new(
Codec::default(),
vec![(Protocol, ProtocolSupport::Full)],
vec![(Message1Protocol, ProtocolSupport::Full)],
config,
),
events: Default::default(),
@ -77,10 +77,12 @@ impl NetworkBehaviourEventProcess<RequestResponseEvent<BobToAlice, AliceToBob>>
RequestResponseEvent::Message {
message: RequestResponseMessage::Response { response, .. },
..
} => match response {
AliceToBob::Message1(msg) => self.events.push_back(OutEvent::Msg(msg)),
other => debug!("got response: {:?}", other),
},
} => {
if let AliceToBob::Message1(msg) = response {
debug!("Received Message1");
self.events.push_back(OutEvent::Msg(msg));
}
}
RequestResponseEvent::InboundFailure { error, .. } => {
error!("Inbound failure: {:?}", error);
}

40
swap/src/bob/message2.rs
View File

@ -7,23 +7,28 @@ use libp2p::{
NetworkBehaviour, PeerId,
};
use std::{
collections::VecDeque,
task::{Context, Poll},
time::Duration,
};
use tracing::{debug, error};
use crate::{
network::request_response::{AliceToBob, BobToAlice, Codec, Protocol, TIMEOUT},
Never,
};
use xmr_btc::bob;
use crate::network::request_response::{AliceToBob, BobToAlice, Codec, Message2Protocol, TIMEOUT};
use xmr_btc::{alice, bob};
#[derive(Debug)]
pub enum OutEvent {
Msg(alice::Message2),
}
/// A `NetworkBehaviour` that represents sending message 2 to Alice.
#[derive(NetworkBehaviour)]
#[behaviour(out_event = "Never", poll_method = "poll")]
#[behaviour(out_event = "OutEvent", poll_method = "poll")]
#[allow(missing_debug_implementations)]
pub struct Message2 {
rr: RequestResponse<Codec>,
rr: RequestResponse<Codec<Message2Protocol>>,
#[behaviour(ignore)]
events: VecDeque<OutEvent>,
}
impl Message2 {
@ -32,13 +37,15 @@ impl Message2 {
let _id = self.rr.send_request(&alice, msg);
}
// TODO: Do we need a custom implementation if we are not bubbling any out
// events?
fn poll(
&mut self,
_: &mut Context<'_>,
_: &mut impl PollParameters,
) -> Poll<NetworkBehaviourAction<RequestProtocol<Codec>, Never>> {
) -> Poll<NetworkBehaviourAction<RequestProtocol<Codec<Message2Protocol>>, OutEvent>> {
if let Some(event) = self.events.pop_front() {
return Poll::Ready(NetworkBehaviourAction::GenerateEvent(event));
}
Poll::Pending
}
}
@ -52,9 +59,10 @@ impl Default for Message2 {
Self {
rr: RequestResponse::new(
Codec::default(),
vec![(Protocol, ProtocolSupport::Full)],
vec![(Message2Protocol, ProtocolSupport::Full)],
config,
),
events: VecDeque::default(),
}
}
}
@ -69,10 +77,12 @@ impl NetworkBehaviourEventProcess<RequestResponseEvent<BobToAlice, AliceToBob>>
RequestResponseEvent::Message {
message: RequestResponseMessage::Response { response, .. },
..
} => match response {
AliceToBob::EmptyResponse => debug!("Alice correctly responded to message 2"),
other => debug!("unexpected response: {:?}", other),
},
} => {
if let AliceToBob::Message2(msg) = response {
debug!("Received Message2");
self.events.push_back(OutEvent::Msg(msg));
}
}
RequestResponseEvent::InboundFailure { error, .. } => {
error!("Inbound failure: {:?}", error);
}

93
swap/src/bob/message3.rs Normal file
View File

@ -0,0 +1,93 @@
use libp2p::{
request_response::{
handler::RequestProtocol, ProtocolSupport, RequestResponse, RequestResponseConfig,
RequestResponseEvent, RequestResponseMessage,
},
swarm::{NetworkBehaviourAction, NetworkBehaviourEventProcess, PollParameters},
NetworkBehaviour, PeerId,
};
use std::{
collections::VecDeque,
task::{Context, Poll},
time::Duration,
};
use tracing::error;
use crate::network::request_response::{AliceToBob, BobToAlice, Codec, Message3Protocol, TIMEOUT};
use xmr_btc::bob;
#[derive(Debug)]
pub enum OutEvent {
Msg,
}
/// A `NetworkBehaviour` that represents sending message 3 to Alice.
#[derive(NetworkBehaviour)]
#[behaviour(out_event = "OutEvent", poll_method = "poll")]
#[allow(missing_debug_implementations)]
pub struct Message3 {
rr: RequestResponse<Codec<Message3Protocol>>,
#[behaviour(ignore)]
events: VecDeque<OutEvent>,
}
impl Message3 {
pub fn send(&mut self, alice: PeerId, msg: bob::Message3) {
let msg = BobToAlice::Message3(msg);
let _id = self.rr.send_request(&alice, msg);
}
fn poll(
&mut self,
_: &mut Context<'_>,
_: &mut impl PollParameters,
) -> Poll<NetworkBehaviourAction<RequestProtocol<Codec<Message3Protocol>>, OutEvent>> {
if let Some(event) = self.events.pop_front() {
return Poll::Ready(NetworkBehaviourAction::GenerateEvent(event));
}
Poll::Pending
}
}
impl Default for Message3 {
fn default() -> Self {
let timeout = Duration::from_secs(TIMEOUT);
let mut config = RequestResponseConfig::default();
config.set_request_timeout(timeout);
Self {
rr: RequestResponse::new(
Codec::default(),
vec![(Message3Protocol, ProtocolSupport::Full)],
config,
),
events: Default::default(),
}
}
}
impl NetworkBehaviourEventProcess<RequestResponseEvent<BobToAlice, AliceToBob>> for Message3 {
fn inject_event(&mut self, event: RequestResponseEvent<BobToAlice, AliceToBob>) {
match event {
RequestResponseEvent::Message {
message: RequestResponseMessage::Request { .. },
..
} => panic!("Bob should never get a request from Alice"),
RequestResponseEvent::Message {
message: RequestResponseMessage::Response { response, .. },
..
} => {
if let AliceToBob::Message3 = response {
self.events.push_back(OutEvent::Msg);
}
}
RequestResponseEvent::InboundFailure { error, .. } => {
error!("Inbound failure: {:?}", error);
}
RequestResponseEvent::OutboundFailure { error, .. } => {
error!("Outbound failure: {:?}", error);
}
}
}
}

5
swap/src/lib.rs
View File

@ -4,15 +4,14 @@ use std::fmt::{self, Display};
pub mod alice;
pub mod bitcoin;
pub mod bob;
pub mod monero;
pub mod network;
pub mod storage;
#[cfg(feature = "tor")]
pub mod tor;
pub const ONE_BTC: u64 = 100_000_000;
const REFUND_TIMELOCK: u32 = 10; // Relative timelock, this is number of blocks. TODO: What should it be?
const PUNISH_TIMELOCK: u32 = 20; // FIXME: What should this be?
const PUNISH_TIMELOCK: u32 = 10; // FIXME: What should this be?
pub type Never = std::convert::Infallible;

66
swap/src/main.rs
View File

@ -13,28 +13,28 @@
#![forbid(unsafe_code)]
use anyhow::{bail, Context, Result};
use cli::Options;
use futures::{channel::mpsc, StreamExt};
use libp2p::Multiaddr;
use log::LevelFilter;
use std::{io, io::Write, process};
use std::{io, io::Write, process, sync::Arc};
use structopt::StructOpt;
use swap::{alice, bitcoin::Wallet, bob, Cmd, Rsp, SwapAmounts};
use tracing::info;
use url::Url;
use xmr_btc::bitcoin::{BroadcastSignedTransaction, BuildTxLockPsbt, SignTxLock};
mod cli;
mod trace;
use cli::Options;
use swap::{alice, bitcoin, bob, monero, Cmd, Rsp, SwapAmounts};
// TODO: Add root seed file instead of generating new seed each run.
// TODO: Remove all instances of the todo! macro
// TODO: Add a config file with these in it.
// Alice's address and port until we have a config file.
pub const PORT: u16 = 9876; // Arbitrarily chosen.
pub const ADDR: &str = "127.0.0.1";
pub const BITCOIND_JSON_RPC_URL: &str = "http://127.0.0.1:8332";
pub const MONERO_WALLET_RPC_PORT: u16 = 18083;
#[cfg(feature = "tor")]
pub const TOR_PORT: u16 = PORT + 1;
@ -70,45 +70,37 @@ async fn main() -> Result<()> {
}
let url = Url::parse(BITCOIND_JSON_RPC_URL).expect("failed to parse url");
let bitcoin_wallet = Wallet::new("alice", &url)
let bitcoin_wallet = bitcoin::Wallet::new("alice", &url)
.await
.expect("failed to create bitcoin wallet");
let bitcoin_wallet = Arc::new(bitcoin_wallet);
let redeem = bitcoin_wallet
.new_address()
.await
.expect("failed to get new redeem address");
let punish = bitcoin_wallet
.new_address()
.await
.expect("failed to get new punish address");
let monero_wallet = Arc::new(monero::Wallet::localhost(MONERO_WALLET_RPC_PORT));
swap_as_alice(alice.clone(), redeem, punish).await?;
swap_as_alice(bitcoin_wallet, monero_wallet, alice.clone()).await?;
} else {
info!("running swap node as Bob ...");
let alice_address = match opt.alice_address {
let alice = match opt.alice_address {
Some(addr) => addr,
None => bail!("Address required to dial"),
};
let alice_address = multiaddr(&alice_address)?;
let alice = multiaddr(&alice)?;
let url = Url::parse(BITCOIND_JSON_RPC_URL).expect("failed to parse url");
let bitcoin_wallet = Wallet::new("bob", &url)
let bitcoin_wallet = bitcoin::Wallet::new("bob", &url)
.await
.expect("failed to create bitcoin wallet");
let bitcoin_wallet = Arc::new(bitcoin_wallet);
let refund = bitcoin_wallet
.new_address()
.await
.expect("failed to get new address");
let monero_wallet = Arc::new(monero::Wallet::localhost(MONERO_WALLET_RPC_PORT));
match (opt.piconeros, opt.satoshis) {
(Some(_), Some(_)) => bail!("Please supply only a single amount to swap"),
(None, None) => bail!("Please supply an amount to swap"),
(Some(_picos), _) => todo!("support starting with picos"),
(None, Some(sats)) => {
swap_as_bob(sats, alice_address, refund, bitcoin_wallet).await?;
swap_as_bob(bitcoin_wallet, monero_wallet, sats, alice).await?;
}
};
}
@ -135,32 +127,36 @@ async fn create_tor_service(
}
async fn swap_as_alice(
bitcoin_wallet: Arc<swap::bitcoin::Wallet>,
monero_wallet: Arc<swap::monero::Wallet>,
addr: Multiaddr,
redeem: bitcoin::Address,
punish: bitcoin::Address,
) -> Result<()> {
#[cfg(not(feature = "tor"))]
{
alice::swap(addr, None, redeem, punish).await
alice::swap(bitcoin_wallet, monero_wallet, addr, None).await
}
#[cfg(feature = "tor")]
{
alice::swap(addr, Some(PORT), redeem, punish).await
alice::swap(bitcoin_wallet, monero_wallet, addr, Some(PORT)).await
}
}
async fn swap_as_bob<W>(
async fn swap_as_bob(
bitcoin_wallet: Arc<swap::bitcoin::Wallet>,
monero_wallet: Arc<swap::monero::Wallet>,
sats: u64,
alice: Multiaddr,
refund: bitcoin::Address,
wallet: W,
) -> Result<()>
where
W: BuildTxLockPsbt + SignTxLock + BroadcastSignedTransaction + Send + Sync + 'static,
{
) -> Result<()> {
let (cmd_tx, mut cmd_rx) = mpsc::channel(1);
let (mut rsp_tx, rsp_rx) = mpsc::channel(1);
tokio::spawn(bob::swap(sats, alice, cmd_tx, rsp_rx, refund, wallet));
tokio::spawn(bob::swap(
bitcoin_wallet,
monero_wallet,
sats,
alice,
cmd_tx,
rsp_rx,
));
loop {
let read = cmd_rx.next().await;

135
swap/src/monero.rs Normal file
View File

@ -0,0 +1,135 @@
use anyhow::Result;
use async_trait::async_trait;
use backoff::{backoff::Constant as ConstantBackoff, future::FutureOperation as _};
use monero::{Address, Network, PrivateKey};
use monero_harness::rpc::wallet;
use std::{str::FromStr, time::Duration};
pub use xmr_btc::monero::{
Amount, CreateWalletForOutput, InsufficientFunds, PrivateViewKey, PublicKey, PublicViewKey,
Transfer, TransferProof, TxHash, WatchForTransfer, *,
};
pub struct Wallet(pub wallet::Client);
impl Wallet {
pub fn localhost(port: u16) -> Self {
Self(wallet::Client::localhost(port))
}
/// Get the balance of the primary account.
pub async fn get_balance(&self) -> Result<Amount> {
let amount = self.0.get_balance(0).await?;
Ok(Amount::from_piconero(amount))
}
}
#[async_trait]
impl Transfer for Wallet {
async fn transfer(
&self,
public_spend_key: PublicKey,
public_view_key: PublicViewKey,
amount: Amount,
) -> Result<(TransferProof, Amount)> {
let destination_address =
Address::standard(Network::Mainnet, public_spend_key, public_view_key.into());
let res = self
.0
.transfer(0, amount.as_piconero(), &destination_address.to_string())
.await?;
let tx_hash = TxHash(res.tx_hash);
let tx_key = PrivateKey::from_str(&res.tx_key)?;
let fee = Amount::from_piconero(res.fee);
Ok((TransferProof::new(tx_hash, tx_key), fee))
}
}
#[async_trait]
impl CreateWalletForOutput for Wallet {
async fn create_and_load_wallet_for_output(
&self,
private_spend_key: PrivateKey,
private_view_key: PrivateViewKey,
) -> Result<()> {
let public_spend_key = PublicKey::from_private_key(&private_spend_key);
let public_view_key = PublicKey::from_private_key(&private_view_key.into());
let address = Address::standard(Network::Mainnet, public_spend_key, public_view_key);
let _ = self
.0
.generate_from_keys(
&address.to_string(),
&private_spend_key.to_string(),
&PrivateKey::from(private_view_key).to_string(),
)
.await?;
Ok(())
}
}
// TODO: For retry, use `backoff::ExponentialBackoff` in production as opposed
// to `ConstantBackoff`.
#[async_trait]
impl WatchForTransfer for Wallet {
async fn watch_for_transfer(
&self,
public_spend_key: PublicKey,
public_view_key: PublicViewKey,
transfer_proof: TransferProof,
expected_amount: Amount,
expected_confirmations: u32,
) -> Result<(), InsufficientFunds> {
enum Error {
TxNotFound,
InsufficientConfirmations,
InsufficientFunds { expected: Amount, actual: Amount },
}
let address = Address::standard(Network::Mainnet, public_spend_key, public_view_key.into());
let res = (|| async {
// NOTE: Currently, this is conflating IO errors with the transaction not being
// in the blockchain yet, or not having enough confirmations on it. All these
// errors warrant a retry, but the strategy should probably differ per case
let proof = self
.0
.check_tx_key(
&String::from(transfer_proof.tx_hash()),
&transfer_proof.tx_key().to_string(),
&address.to_string(),
)
.await
.map_err(|_| backoff::Error::Transient(Error::TxNotFound))?;
if proof.received != expected_amount.as_piconero() {
return Err(backoff::Error::Permanent(Error::InsufficientFunds {
expected: expected_amount,
actual: Amount::from_piconero(proof.received),
}));
}
if proof.confirmations < expected_confirmations {
return Err(backoff::Error::Transient(Error::InsufficientConfirmations));
}
Ok(proof)
})
.retry(ConstantBackoff::new(Duration::from_secs(1)))
.await;
if let Err(Error::InsufficientFunds { expected, actual }) = res {
return Err(InsufficientFunds { expected, actual });
};
Ok(())
}
}

92
swap/src/network/request_response.rs
View File

@ -5,7 +5,8 @@ use libp2p::{
request_response::{ProtocolName, RequestResponseCodec},
};
use serde::{Deserialize, Serialize};
use std::{fmt::Debug, io};
use std::{fmt::Debug, io, marker::PhantomData};
use tracing::debug;
use crate::SwapAmounts;
use xmr_btc::{alice, bob, monero};
@ -13,6 +14,9 @@ use xmr_btc::{alice, bob, monero};
/// Time to wait for a response back once we send a request.
pub const TIMEOUT: u64 = 3600; // One hour.
/// Message receive buffer.
const BUF_SIZE: usize = 1024 * 1024;
// TODO: Think about whether there is a better way to do this, e.g., separate
// Codec for each Message and a macro that implements them.
@ -26,6 +30,7 @@ pub enum BobToAlice {
Message0(bob::Message0),
Message1(bob::Message1),
Message2(bob::Message2),
Message3(bob::Message3),
}
/// Messages Alice sends to Bob.
@ -35,25 +40,66 @@ pub enum AliceToBob {
Amounts(SwapAmounts),
Message0(alice::Message0),
Message1(alice::Message1),
EmptyResponse, // This is sent back as response to Message2 from Bob.
Message2(alice::Message2),
Message3, // empty response
}
#[derive(Debug, Clone, Copy, Default)]
pub struct Protocol;
pub struct AmountsProtocol;
impl ProtocolName for Protocol {
#[derive(Debug, Clone, Copy, Default)]
pub struct Message0Protocol;
#[derive(Debug, Clone, Copy, Default)]
pub struct Message1Protocol;
#[derive(Debug, Clone, Copy, Default)]
pub struct Message2Protocol;
#[derive(Debug, Clone, Copy, Default)]
pub struct Message3Protocol;
impl ProtocolName for AmountsProtocol {
fn protocol_name(&self) -> &[u8] {
b"/xmr/btc/1.0.0"
b"/xmr/btc/amounts/1.0.0"
}
}
impl ProtocolName for Message0Protocol {
fn protocol_name(&self) -> &[u8] {
b"/xmr/btc/message0/1.0.0"
}
}
impl ProtocolName for Message1Protocol {
fn protocol_name(&self) -> &[u8] {
b"/xmr/btc/message1/1.0.0"
}
}
impl ProtocolName for Message2Protocol {
fn protocol_name(&self) -> &[u8] {
b"/xmr/btc/message2/1.0.0"
}
}
impl ProtocolName for Message3Protocol {
fn protocol_name(&self) -> &[u8] {
b"/xmr/btc/message3/1.0.0"
}
}
#[derive(Clone, Copy, Debug, Default)]
pub struct Codec;
pub struct Codec<P> {
phantom: PhantomData<P>,
}
#[async_trait]
impl RequestResponseCodec for Codec {
type Protocol = Protocol;
impl<P> RequestResponseCodec for Codec<P>
where
P: Send + Sync + Clone + ProtocolName,
{
type Protocol = P;
type Request = BobToAlice;
type Response = AliceToBob;
@ -61,11 +107,15 @@ impl RequestResponseCodec for Codec {
where
T: AsyncRead + Unpin + Send,
{
let message = upgrade::read_one(io, 1024)
debug!("enter read_request");
let message = upgrade::read_one(io, BUF_SIZE)
.await
.map_err(|e| io::Error::new(io::ErrorKind::InvalidData, e))?;
let mut de = serde_json::Deserializer::from_slice(&message);
let msg = BobToAlice::deserialize(&mut de)?;
let mut de = serde_cbor::Deserializer::from_slice(&message);
let msg = BobToAlice::deserialize(&mut de).map_err(|e| {
tracing::debug!("serde read_request error: {:?}", e);
io::Error::new(io::ErrorKind::Other, e)
})?;
Ok(msg)
}
@ -78,11 +128,15 @@ impl RequestResponseCodec for Codec {
where
T: AsyncRead + Unpin + Send,
{
let message = upgrade::read_one(io, 1024)
debug!("enter read_response");
let message = upgrade::read_one(io, BUF_SIZE)
.await
.map_err(|e| io::Error::new(io::ErrorKind::InvalidData, e))?;
let mut de = serde_json::Deserializer::from_slice(&message);
let msg = AliceToBob::deserialize(&mut de)?;
let mut de = serde_cbor::Deserializer::from_slice(&message);
let msg = AliceToBob::deserialize(&mut de).map_err(|e| {
tracing::debug!("serde read_response error: {:?}", e);
io::Error::new(io::ErrorKind::InvalidData, e)
})?;
Ok(msg)
}
@ -96,7 +150,9 @@ impl RequestResponseCodec for Codec {
where
T: AsyncWrite + Unpin + Send,
{
let bytes = serde_json::to_vec(&req)?;
let bytes =
serde_cbor::to_vec(&req).map_err(|e| io::Error::new(io::ErrorKind::InvalidData, e))?;
upgrade::write_one(io, &bytes).await?;
Ok(())
@ -111,7 +167,11 @@ impl RequestResponseCodec for Codec {
where
T: AsyncWrite + Unpin + Send,
{
let bytes = serde_json::to_vec(&res)?;
debug!("enter write_response");
let bytes = serde_cbor::to_vec(&res).map_err(|e| {
tracing::debug!("serde write_reponse error: {:?}", e);
io::Error::new(io::ErrorKind::InvalidData, e)
})?;
upgrade::write_one(io, &bytes).await?;
Ok(())

100
swap/tests/e2e.rs Normal file
View File

@ -0,0 +1,100 @@
#[cfg(not(feature = "tor"))]
mod e2e_test {
use bitcoin_harness::Bitcoind;
use futures::{channel::mpsc, future::try_join};
use libp2p::Multiaddr;
use monero_harness::Monero;
use std::sync::Arc;
use swap::{alice, bob};
use testcontainers::clients::Cli;
use tracing_subscriber::util::SubscriberInitExt;
#[tokio::test]
async fn swap() {
let _guard = tracing_subscriber::fmt()
.with_env_filter(
"swap=debug,xmr_btc=debug,hyper=off,reqwest=off,monero_harness=info,testcontainers=info,libp2p=debug",
)
.with_ansi(false)
.set_default();
let alice_multiaddr: Multiaddr = "/ip4/127.0.0.1/tcp/9876"
.parse()
.expect("failed to parse Alice's address");
let cli = Cli::default();
let bitcoind = Bitcoind::new(&cli, "0.19.1").unwrap();
let _ = bitcoind.init(5).await;
let btc = bitcoin::Amount::from_sat(1_000_000);
let btc_alice = bitcoin::Amount::ZERO;
let btc_bob = btc * 10;
// this xmr value matches the logic of alice::calculate_amounts i.e. btc *
// 10_000 * 100
let xmr = 1_000_000_000_000;
let xmr_alice = xmr * 10;
let xmr_bob = 0;
let alice_btc_wallet = Arc::new(
swap::bitcoin::Wallet::new("alice", &bitcoind.node_url)
.await
.unwrap(),
);
let bob_btc_wallet = Arc::new(
swap::bitcoin::Wallet::new("bob", &bitcoind.node_url)
.await
.unwrap(),
);
bitcoind
.mint(bob_btc_wallet.0.new_address().await.unwrap(), btc_bob)
.await
.unwrap();
let (monero, _container) = Monero::new(&cli).unwrap();
monero.init(xmr_alice, xmr_bob).await.unwrap();
let alice_xmr_wallet = Arc::new(swap::monero::Wallet(monero.alice_wallet_rpc_client()));
let bob_xmr_wallet = Arc::new(swap::monero::Wallet(monero.bob_wallet_rpc_client()));
let alice_swap = alice::swap(
alice_btc_wallet.clone(),
alice_xmr_wallet.clone(),
alice_multiaddr.clone(),
None,
);
let (cmd_tx, mut _cmd_rx) = mpsc::channel(1);
let (mut rsp_tx, rsp_rx) = mpsc::channel(1);
let bob_swap = bob::swap(
bob_btc_wallet.clone(),
bob_xmr_wallet.clone(),
btc.as_sat(),
alice_multiaddr,
cmd_tx,
rsp_rx,
);
// automate the verification step by accepting any amounts sent over by Alice
rsp_tx.try_send(swap::Rsp::VerifiedAmounts).unwrap();
try_join(alice_swap, bob_swap).await.unwrap();
let btc_alice_final = alice_btc_wallet.as_ref().balance().await.unwrap();
let btc_bob_final = bob_btc_wallet.as_ref().balance().await.unwrap();
let xmr_alice_final = alice_xmr_wallet.as_ref().get_balance().await.unwrap();
monero.wait_for_bob_wallet_block_height().await.unwrap();
let xmr_bob_final = bob_xmr_wallet.as_ref().get_balance().await.unwrap();
assert_eq!(
btc_alice_final,
btc_alice + btc - bitcoin::Amount::from_sat(xmr_btc::bitcoin::TX_FEE)
);
assert!(btc_bob_final <= btc_bob - btc);
assert!(xmr_alice_final.as_piconero() <= xmr_alice - xmr);
assert_eq!(xmr_bob_final.as_piconero(), xmr_bob + xmr);
}
}

2
xmr-btc/Cargo.toml
View File

@ -28,7 +28,7 @@ tracing = "0.1"
[dev-dependencies]
backoff = { version = "0.2", features = ["tokio"] }
base64 = "0.12"
bitcoin-harness = { git = "https://github.com/coblox/bitcoin-harness-rs", rev = "7ff30a559ab57cc3aa71189e71433ef6b2a6c3a2" }
bitcoin-harness = { git = "https://github.com/coblox/bitcoin-harness-rs", rev = "f1bbe6a4540d0741f1f4f22577cfeeadbfd7aaaf" }
futures = "0.3"
monero-harness = { path = "../monero-harness" }
reqwest = { version = "0.10", default-features = false }

42
xmr-btc/src/alice.rs
View File

@ -24,8 +24,8 @@ use std::{
sync::Arc,
time::Duration,
};
use tokio::time::timeout;
use tracing::error;
use tokio::{sync::Mutex, time::timeout};
use tracing::{error, info};
pub mod message;
pub use message::{Message, Message0, Message1, Message2};
@ -62,7 +62,7 @@ pub trait ReceiveBitcoinRedeemEncsig {
/// The argument `bitcoin_tx_lock_timeout` is used to determine how long we will
/// wait for Bob, the counterparty, to lock up the bitcoin.
pub fn action_generator<N, B>(
mut network: N,
network: Arc<Mutex<N>>,
bitcoin_client: Arc<B>,
// TODO: Replace this with a new, slimmer struct?
State3 {
@ -86,7 +86,7 @@ pub fn action_generator<N, B>(
bitcoin_tx_lock_timeout: u64,
) -> GenBoxed<Action, (), ()>
where
N: ReceiveBitcoinRedeemEncsig + Send + Sync + 'static,
N: ReceiveBitcoinRedeemEncsig + Send + 'static,
B: bitcoin::BlockHeight
+ bitcoin::TransactionBlockHeight
+ bitcoin::WatchForRawTransaction
@ -158,19 +158,26 @@ where
// TODO: Watch for LockXmr using watch-only wallet. Doing so will prevent Alice
// from cancelling/refunding unnecessarily.
let tx_redeem_encsig = match select(
network.receive_bitcoin_redeem_encsig(),
poll_until_btc_has_expired.clone(),
)
.await
{
Either::Left((encsig, _)) => encsig,
Either::Right(_) => {
return Err(SwapFailed::AfterXmrLock {
reason: Reason::BtcExpired,
tx_lock_height,
})
}
let tx_redeem_encsig = {
let mut guard = network.as_ref().lock().await;
let tx_redeem_encsig = match select(
guard.receive_bitcoin_redeem_encsig(),
poll_until_btc_has_expired.clone(),
)
.await
{
Either::Left((encsig, _)) => encsig,
Either::Right(_) => {
return Err(SwapFailed::AfterXmrLock {
reason: Reason::BtcExpired,
tx_lock_height,
})
}
};
tracing::debug!("select returned redeem encsig from message");
tx_redeem_encsig
};
let (signed_tx_redeem, tx_redeem_txid) = {
@ -519,6 +526,7 @@ impl State0 {
}
pub fn next_message<R: RngCore + CryptoRng>(&self, rng: &mut R) -> Message0 {
info!("Producing first message");
let dleq_proof_s_a = cross_curve_dleq::Proof::new(rng, &self.s_a);
Message0 {

2
xmr-btc/src/alice/message.rs
View File

@ -31,7 +31,7 @@ pub struct Message1 {
#[derive(Clone, Debug, Serialize, Deserialize)]
pub struct Message2 {
pub(crate) tx_lock_proof: monero::TransferProof,
pub tx_lock_proof: monero::TransferProof,
}
impl_try_from_parent_enum!(Message0, Message);

29
xmr-btc/src/bob.rs
View File

@ -28,7 +28,7 @@ use std::{
sync::Arc,
time::Duration,
};
use tokio::time::timeout;
use tokio::{sync::Mutex, time::timeout};
use tracing::error;
pub mod message;
@ -62,7 +62,7 @@ pub trait ReceiveTransferProof {
/// The argument `bitcoin_tx_lock_timeout` is used to determine how long we will
/// wait for Bob, the caller of this function, to lock up the bitcoin.
pub fn action_generator<N, M, B>(
mut network: N,
network: Arc<Mutex<N>>,
monero_client: Arc<M>,
bitcoin_client: Arc<B>,
// TODO: Replace this with a new, slimmer struct?
@ -85,7 +85,7 @@ pub fn action_generator<N, M, B>(
bitcoin_tx_lock_timeout: u64,
) -> GenBoxed<Action, (), ()>
where
N: ReceiveTransferProof + Send + Sync + 'static,
N: ReceiveTransferProof + Send + 'static,
M: monero::WatchForTransfer + Send + Sync + 'static,
B: bitcoin::BlockHeight
+ bitcoin::TransactionBlockHeight
@ -140,14 +140,21 @@ where
.shared();
pin_mut!(poll_until_btc_has_expired);
let transfer_proof = match select(
network.receive_transfer_proof(),
poll_until_btc_has_expired.clone(),
)
.await
{
Either::Left((proof, _)) => proof,
Either::Right(_) => return Err(SwapFailed::AfterBtcLock(Reason::BtcExpired)),
let transfer_proof = {
let mut guard = network.as_ref().lock().await;
let transfer_proof = match select(
guard.receive_transfer_proof(),
poll_until_btc_has_expired.clone(),
)
.await
{
Either::Left((proof, _)) => proof,
Either::Right(_) => return Err(SwapFailed::AfterBtcLock(Reason::BtcExpired)),
};
tracing::debug!("select returned transfer proof from message");
transfer_proof
};
let S_b_monero = monero::PublicKey::from_private_key(&monero::PrivateKey::from_scalar(

4
xmr-btc/src/bob/message.rs
View File

@ -33,9 +33,9 @@ pub struct Message2 {
pub(crate) tx_cancel_sig: Signature,
}
#[derive(Clone, Debug)]
#[derive(Clone, Debug, Serialize, Deserialize)]
pub struct Message3 {
pub(crate) tx_redeem_encsig: EncryptedSignature,
pub tx_redeem_encsig: EncryptedSignature,
}
impl_try_from_parent_enum!(Message0, Message);

26
xmr-btc/tests/on_chain.rs
View File

@ -1,7 +1,5 @@
pub mod harness;
use std::{convert::TryInto, sync::Arc};
use anyhow::Result;
use async_trait::async_trait;
use futures::{
@ -16,9 +14,10 @@ use harness::{
};
use monero_harness::Monero;
use rand::rngs::OsRng;
use std::{convert::TryInto, sync::Arc};
use testcontainers::clients::Cli;
use tokio::sync::Mutex;
use tracing::info;
use tracing_subscriber::util::SubscriberInitExt;
use xmr_btc::{
alice::{self, ReceiveBitcoinRedeemEncsig},
bitcoin::{BroadcastSignedTransaction, EncryptedSignature, SignTxLock},
@ -102,7 +101,7 @@ impl Default for BobBehaviour {
}
async fn swap_as_alice(
network: AliceNetwork,
network: Arc<Mutex<AliceNetwork>>,
// FIXME: It would be more intuitive to have a single network/transport struct instead of
// splitting into two, but Rust ownership rules make this tedious
mut sender: Sender<TransferProof>,
@ -168,7 +167,7 @@ async fn swap_as_alice(
}
async fn swap_as_bob(
network: BobNetwork,
network: Arc<Mutex<BobNetwork>>,
mut sender: Sender<EncryptedSignature>,
monero_wallet: Arc<harness::wallet::monero::Wallet>,
bitcoin_wallet: Arc<harness::wallet::bitcoin::Wallet>,
@ -276,7 +275,7 @@ async fn on_chain_happy_path() {
try_join(
swap_as_alice(
alice_network,
Arc::new(Mutex::new(alice_network)),
alice_sender,
alice_monero_wallet.clone(),
alice_bitcoin_wallet.clone(),
@ -284,7 +283,7 @@ async fn on_chain_happy_path() {
alice,
),
swap_as_bob(
bob_network,
Arc::new(Mutex::new(bob_network)),
bob_sender,
bob_monero_wallet.clone(),
bob_bitcoin_wallet.clone(),
@ -367,7 +366,7 @@ async fn on_chain_both_refund_if_alice_never_redeems() {
try_join(
swap_as_alice(
alice_network,
Arc::new(Mutex::new(alice_network)),
alice_sender,
alice_monero_wallet.clone(),
alice_bitcoin_wallet.clone(),
@ -378,7 +377,7 @@ async fn on_chain_both_refund_if_alice_never_redeems() {
alice,
),
swap_as_bob(
bob_network,
Arc::new(Mutex::new(bob_network)),
bob_sender,
bob_monero_wallet.clone(),
bob_bitcoin_wallet.clone(),
@ -419,11 +418,6 @@ async fn on_chain_both_refund_if_alice_never_redeems() {
#[tokio::test]
async fn on_chain_alice_punishes_if_bob_never_acts_after_fund() {
let _guard = tracing_subscriber::fmt()
.with_env_filter("info")
.with_ansi(false)
.set_default();
let cli = Cli::default();
let (monero, _container) = Monero::new(&cli).unwrap();
let bitcoind = init_bitcoind(&cli).await;
@ -461,7 +455,7 @@ async fn on_chain_alice_punishes_if_bob_never_acts_after_fund() {
let (bob_network, alice_sender) = Network::<TransferProof>::new();
let alice_swap = swap_as_alice(
alice_network,
Arc::new(Mutex::new(alice_network)),
alice_sender,
alice_monero_wallet.clone(),
alice_bitcoin_wallet.clone(),
@ -469,7 +463,7 @@ async fn on_chain_alice_punishes_if_bob_never_acts_after_fund() {
alice,
);
let bob_swap = swap_as_bob(
bob_network,
Arc::new(Mutex::new(bob_network)),
bob_sender,
bob_monero_wallet.clone(),
bob_bitcoin_wallet.clone(),