Upgrade tokio to 1.0

Upgrade bitcoin harness dependency to latest commit

Upgrade backoff to fix failing tests. The previous version of backoff had a broken version of the retry function. Upgraded to a newer comit which fixes this problem.

Upgrade hyper to 0.14 as the 0.13 was bringing in tokio 0.2.24

Upgraded bitcoin harness to version that uses tokio 1.0 and reqwest 0.11

Upgrade reqwest to 0.11. Reqwest 0.11 uses tokio 1.0

Upgrade libp2p to 0.34 in preparation for tokio 1.0 upgrade

monero-harness/Cargo.toml

@@ -10,12 +10,12 @@ digest_auth = "0.2.3"
 futures = "0.3"
 port_check = "0.1"
 rand = "0.7"
-reqwest = { version = "0.10", default-features = false, features = ["json", "native-tls"] }
+reqwest = { version = "0.11", default-features = false, features = ["json", "native-tls"] }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
 spectral = "0.6"
 testcontainers = "0.11"
-tokio = { version = "0.2", default-features = false, features = ["blocking", "macros", "rt-core", "time"] }
+tokio = { version = "1.0", default-features = false, features = ["rt-multi-thread", "time", "macros"] }
 tracing = "0.1"
 tracing-log = "0.1"
 tracing-subscriber = { version = "0.2", default-features = false, features = ["fmt", "ansi", "env-filter"] }

monero-harness/src/lib.rs

@@ -266,7 +266,7 @@ impl<'c> MoneroWalletRpc {
                 // ~30 seconds
                 bail!("Wallet could not catch up with monerod after 30 retries.")
             }
-            time::delay_for(Duration::from_millis(WAIT_WALLET_SYNC_MILLIS)).await;
+            time::sleep(Duration::from_millis(WAIT_WALLET_SYNC_MILLIS)).await;
             retry += 1;
         }
         Ok(())
@@ -293,7 +293,7 @@ impl<'c> MoneroWalletRpc {
 /// Mine a block ever BLOCK_TIME_SECS seconds.
 async fn mine(monerod: monerod::Client, reward_address: String) -> Result<()> {
     loop {
-        time::delay_for(Duration::from_secs(BLOCK_TIME_SECS)).await;
+        time::sleep(Duration::from_secs(BLOCK_TIME_SECS)).await;
         monerod.generate_blocks(1, &reward_address).await?;
     }
 }

monero-harness/tests/monerod.rs

@@ -22,7 +22,7 @@ async fn init_miner_and_mine_to_miner_address() {
     let got_miner_balance = miner_wallet.balance().await.unwrap();
     assert_that!(got_miner_balance).is_greater_than(0);
 
-    time::delay_for(Duration::from_millis(1010)).await;
+    time::sleep(Duration::from_millis(1010)).await;
 
     // after a bit more than 1 sec another block should have been mined
     let block_height = monerod.client().get_block_count().await.unwrap();

swap/Cargo.toml

@@ -10,10 +10,10 @@ anyhow = "1"
 async-recursion = "0.3.1"
 async-trait = "0.1"
 atty = "0.2"
-backoff = { version = "0.2", features = ["tokio"] }
+backoff = { git = "https://github.com/ihrwein/backoff", rev = "9d03992a83dfdc596be26276d4e5c5254a4b11a2", features = ["tokio"] }
 base64 = "0.12"
 bitcoin = { version = "0.25", features = ["rand", "use-serde"] }
-bitcoin-harness = { git = "https://github.com/coblox/bitcoin-harness-rs", rev = "864b55fcba2e770105f135781dd2e3002c503d12" }
+bitcoin-harness = { git = "https://github.com/coblox/bitcoin-harness-rs", rev = "ae2f6cd547496e680941c0910018bbe884128799" }
 conquer-once = "0.3"
 cross-curve-dleq = { git = "https://github.com/comit-network/cross-curve-dleq", rev = "eddcdea1d1f16fa33ef581d1744014ece535c920", features = ["serde"] }
 curve25519-dalek = "2"
@@ -21,8 +21,7 @@ derivative = "2"
 ecdsa_fun = { git = "https://github.com/LLFourn/secp256kfun", rev = "cdfbc766045ea678a41780919d6228dd5acee3be", features = ["libsecp_compat", "serde"] }
 ed25519-dalek = { version = "1.0.0-pre.4", features = ["serde"] }# Cannot be 1 because they depend on curve25519-dalek version 3
 futures = { version = "0.3", default-features = false }
-libp2p = { version = "0.29", default-features = false, features = ["tcp-tokio", "yamux", "mplex", "dns", "noise", "request-response"] }
+libp2p = { version = "0.34", default-features = false, features = ["tcp-tokio", "yamux", "mplex", "dns", "noise", "request-response"] }
-libp2p-tokio-socks5 = "0.4"
 log = { version = "0.4", features = ["serde"] }
 miniscript = { version = "4", features = ["serde"] }
 monero = { version = "0.9", features = ["serde_support"] }
@@ -30,7 +29,7 @@ monero-harness = { path = "../monero-harness" }
 pem = "0.8"
 prettytable-rs = "0.8"
 rand = "0.7"
-reqwest = { version = "0.10", default-features = false, features = ["socks"] }
+reqwest = { version = "0.11", default-features = false }
 rust_decimal = "1.8"
 serde = { version = "1", features = ["derive"] }
 serde_cbor = "0.11"
@@ -43,7 +42,7 @@ strum = { version = "0.20", features = ["derive"] }
 tempfile = "3"
 thiserror = "1"
 time = "0.2"
-tokio = { version = "0.2", features = ["rt-threaded", "time", "macros", "sync"] }
+tokio = { version = "1.0", features = ["rt-multi-thread", "time", "macros", "sync"] }
 tracing = { version = "0.1", features = ["attributes"] }
 tracing-core = "0.1"
 tracing-futures = { version = "0.2", features = ["std-future", "futures-03"] }
@@ -55,7 +54,7 @@ void = "1"
 
 [dev-dependencies]
 get-port = "3"
-hyper = "0.13"
+hyper = "0.14"
 port_check = "0.1"
 serde_cbor = "0.11"
 spectral = "0.6"

swap/src/bitcoin.rs

@@ -252,7 +252,7 @@ where
     B: GetBlockHeight,
 {
     while client.get_block_height().await < target {
-        tokio::time::delay_for(std::time::Duration::from_secs(1)).await;
+        tokio::time::sleep(std::time::Duration::from_secs(1)).await;
     }
 }
 

swap/src/bitcoin/wallet.rs

@@ -9,7 +9,7 @@ use crate::{
 use ::bitcoin::{util::psbt::PartiallySignedTransaction, Txid};
 use anyhow::{Context, Result};
 use async_trait::async_trait;
-use backoff::{backoff::Constant as ConstantBackoff, future::FutureOperation as _};
+use backoff::{backoff::Constant as ConstantBackoff, tokio::retry};
 use bitcoin_harness::{bitcoind_rpc::PsbtBase64, BitcoindRpcApi};
 use reqwest::Url;
 use std::time::Duration;
@@ -112,10 +112,11 @@ impl BroadcastSignedTransaction for Wallet {
 #[async_trait]
 impl WatchForRawTransaction for Wallet {
     async fn watch_for_raw_transaction(&self, txid: Txid) -> Transaction {
-        (|| async { Ok(self.inner.get_raw_transaction(txid).await?) })
+        retry(ConstantBackoff::new(Duration::from_secs(1)), || async {
-            .retry(ConstantBackoff::new(Duration::from_secs(1)))
+            Ok(self.inner.get_raw_transaction(txid).await?)
-            .await
+        })
-            .expect("transient errors to be retried")
+        .await
+        .expect("transient errors to be retried")
     }
 }
 
@@ -130,10 +131,11 @@ impl GetRawTransaction for Wallet {
 #[async_trait]
 impl GetBlockHeight for Wallet {
     async fn get_block_height(&self) -> BlockHeight {
-        let height = (|| async { Ok(self.inner.client.getblockcount().await?) })
+        let height = retry(ConstantBackoff::new(Duration::from_secs(1)), || async {
-            .retry(ConstantBackoff::new(Duration::from_secs(1)))
+            Ok(self.inner.client.getblockcount().await?)
-            .await
+        })
-            .expect("transient errors to be retried");
+        .await
+        .expect("transient errors to be retried");
 
         BlockHeight::new(height)
     }
@@ -148,7 +150,7 @@ impl TransactionBlockHeight for Wallet {
             NotYetMined,
         }
 
-        let height = (|| async {
+        let height = retry(ConstantBackoff::new(Duration::from_secs(1)), || async {
             let block_height = self
                 .inner
                 .transaction_block_height(txid)
@@ -160,7 +162,6 @@ impl TransactionBlockHeight for Wallet {
 
             Result::<_, backoff::Error<Error>>::Ok(block_height)
         })
-        .retry(ConstantBackoff::new(Duration::from_secs(1)))
         .await
         .expect("transient errors to be retried");
 

swap/src/database/alice.rs

@@ -60,7 +60,7 @@ impl From<&AliceState> for Alice {
                 ..
             } => Alice::Negotiated {
                 state3: state3.as_ref().clone(),
-                bob_peer_id: bob_peer_id.clone(),
+                bob_peer_id: *bob_peer_id,
             },
             AliceState::BtcLocked {
                 state3,
@@ -68,7 +68,7 @@ impl From<&AliceState> for Alice {
                 ..
             } => Alice::BtcLocked {
                 state3: state3.as_ref().clone(),
-                bob_peer_id: bob_peer_id.clone(),
+                bob_peer_id: *bob_peer_id,
             },
             AliceState::XmrLocked { state3 } => Alice::XmrLocked(state3.as_ref().clone()),
             AliceState::EncSigLearned {

swap/src/main.rs

@@ -16,12 +16,13 @@ use crate::cli::{Command, Options, Resume};
 use anyhow::{Context, Result};
 use config::Config;
 use database::Database;
+use log::LevelFilter;
 use prettytable::{row, Table};
 use protocol::{alice, bob, bob::Builder, SwapAmounts};
 use std::sync::Arc;
 use structopt::StructOpt;
 use trace::init_tracing;
-use tracing::{info, log::LevelFilter};
+use tracing::info;
 use uuid::Uuid;
 
 pub mod bitcoin;

swap/src/monero/wallet.rs

@@ -5,7 +5,7 @@ use crate::monero::{
 use ::monero::{Address, Network, PrivateKey, PublicKey};
 use anyhow::Result;
 use async_trait::async_trait;
-use backoff::{backoff::Constant as ConstantBackoff, future::FutureOperation as _};
+use backoff::{backoff::Constant as ConstantBackoff, tokio::retry};
 use bitcoin::hashes::core::sync::atomic::AtomicU32;
 use monero_harness::rpc::wallet;
 use std::{
@@ -96,7 +96,6 @@ impl CreateWalletForOutput for Wallet {
 
 // TODO: For retry, use `backoff::ExponentialBackoff` in production as opposed
 // to `ConstantBackoff`.
-
 #[async_trait]
 impl WatchForTransfer for Wallet {
     async fn watch_for_transfer(
@@ -117,46 +116,41 @@ impl WatchForTransfer for Wallet {
         let wallet = self.inner.clone();
 
         let confirmations = Arc::new(AtomicU32::new(0u32));
-        let res = (move || {
+
-            let confirmations = confirmations.clone();
+        let res = retry(ConstantBackoff::new(Duration::from_secs(1)), || async {
-            let transfer_proof = transfer_proof.clone();
+            // NOTE: Currently, this is conflicting IO errors with the transaction not being
-            let wallet = wallet.clone();
+            // in the blockchain yet, or not having enough confirmations on it. All these
-            async move {
+            // errors warrant a retry, but the strategy should probably differ per case
-                // NOTE: Currently, this is conflicting IO errors with the transaction not being
+            let proof = wallet
-                // in the blockchain yet, or not having enough confirmations on it. All these
+                .check_tx_key(
-                // errors warrant a retry, but the strategy should probably differ per case
+                    &String::from(transfer_proof.tx_hash()),
-                let proof = wallet
+                    &transfer_proof.tx_key().to_string(),
-                    .check_tx_key(
+                    &address.to_string(),
-                        &String::from(transfer_proof.tx_hash()),
+                )
-                        &transfer_proof.tx_key().to_string(),
+                .await
-                        &address.to_string(),
+                .map_err(|_| backoff::Error::Transient(Error::TxNotFound))?;
-                    )
+
-                    .await
+            if proof.received != expected_amount.as_piconero() {
-                    .map_err(|_| backoff::Error::Transient(Error::TxNotFound))?;
+                return Err(backoff::Error::Permanent(Error::InsufficientFunds {
-
+                    expected: expected_amount,
-                if proof.received != expected_amount.as_piconero() {
+                    actual: Amount::from_piconero(proof.received),
-                    return Err(backoff::Error::Permanent(Error::InsufficientFunds {
+                }));
-                        expected: expected_amount,
+            }
-                        actual: Amount::from_piconero(proof.received),
+
-                    }));
+            if proof.confirmations > confirmations.load(Ordering::SeqCst) {
-                }
+                confirmations.store(proof.confirmations, Ordering::SeqCst);
-
+                info!(
-                if proof.confirmations > confirmations.load(Ordering::SeqCst) {
+                    "Monero lock tx received {} out of {} confirmations",
-                    confirmations.store(proof.confirmations, Ordering::SeqCst);
+                    proof.confirmations, expected_confirmations
-                    info!(
+                );
-                        "Monero lock tx received {} out of {} confirmations",
-                        proof.confirmations, expected_confirmations
-                    );
-                }
-
-                if proof.confirmations < expected_confirmations {
-                    return Err(backoff::Error::Transient(Error::InsufficientConfirmations));
-                }
-
-                Ok(proof)
             }
+
+            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 {

swap/src/network/peer_tracker.rs

@@ -12,7 +12,7 @@ use std::{
     task::Poll,
 };
 
-#[derive(Debug)]
+#[derive(Debug, Copy, Clone)]
 pub enum OutEvent {
     ConnectionEstablished(PeerId),
 }
@@ -42,7 +42,7 @@ impl PeerTracker {
     /// Returns the peer id of counterparty if we are connected.
     pub fn counterparty_peer_id(&self) -> Option<PeerId> {
         if let Some((id, _)) = &self.connected {
-            return Some(id.clone());
+            return Some(*id);
         }
         None
     }
@@ -50,7 +50,7 @@ impl PeerTracker {
     /// Returns the peer_id and multiaddr of counterparty if we are connected.
     pub fn counterparty(&self) -> Option<(PeerId, Multiaddr)> {
         if let Some((peer_id, addr)) = &self.connected {
-            return Some((peer_id.clone(), addr.clone()));
+            return Some((*peer_id, addr.clone()));
         }
         None
     }
@@ -97,18 +97,18 @@ impl NetworkBehaviour for PeerTracker {
     ) {
         match point {
             ConnectedPoint::Dialer { address } => {
-                self.connected = Some((peer.clone(), address.clone()));
+                self.connected = Some((*peer, address.clone()));
             }
             ConnectedPoint::Listener {
                 local_addr: _,
                 send_back_addr,
             } => {
-                self.connected = Some((peer.clone(), send_back_addr.clone()));
+                self.connected = Some((*peer, send_back_addr.clone()));
             }
         }
 
         self.events
-            .push_back(OutEvent::ConnectionEstablished(peer.clone()));
+            .push_back(OutEvent::ConnectionEstablished(*peer));
     }
 
     fn inject_connection_closed(&mut self, _: &PeerId, _: &ConnectionId, _: &ConnectedPoint) {

swap/src/network/transport.rs

@@ -31,7 +31,7 @@ pub fn build(id_keys: identity::Keypair) -> Result<SwapTransport> {
         .upgrade(Version::V1)
         .authenticate(noise)
         .multiplex(SelectUpgrade::new(
-            yamux::Config::default(),
+            yamux::YamuxConfig::default(),
             MplexConfig::new(),
         ))
         .map(|(peer, muxer), _| (peer, StreamMuxerBox::new(muxer)))

swap/src/protocol/alice.rs

@@ -165,7 +165,7 @@ impl Builder {
     }
 
     pub fn peer_id(&self) -> PeerId {
-        self.peer_id.clone()
+        self.peer_id
     }
 
     pub fn listen_address(&self) -> Multiaddr {
@@ -211,7 +211,7 @@ impl Builder {
             alice_transport,
             alice_behaviour,
             self.listen_address.clone(),
-            self.peer_id.clone(),
+            self.peer_id,
         )
     }
 }
@@ -322,21 +322,32 @@ impl Behaviour {
         &mut self,
         channel: ResponseChannel<AliceToBob>,
         swap_response: SwapResponse,
-    ) {
+    ) -> Result<()> {
-        self.amounts.send(channel, swap_response);
+        self.amounts.send(channel, swap_response)?;
         info!("Sent amounts response");
+        Ok(())
     }
 
     /// Send Message0 to Bob in response to receiving his Message0.
-    pub fn send_message0(&mut self, channel: ResponseChannel<AliceToBob>, msg: Message0) {
+    pub fn send_message0(
-        self.message0.send(channel, msg);
+        &mut self,
+        channel: ResponseChannel<AliceToBob>,
+        msg: Message0,
+    ) -> Result<()> {
+        self.message0.send(channel, msg)?;
         debug!("Sent Message0");
+        Ok(())
     }
 
     /// Send Message1 to Bob in response to receiving his Message1.
-    pub fn send_message1(&mut self, channel: ResponseChannel<AliceToBob>, msg: Message1) {
+    pub fn send_message1(
-        self.message1.send(channel, msg);
+        &mut self,
+        channel: ResponseChannel<AliceToBob>,
+        msg: Message1,
+    ) -> Result<()> {
+        self.message1.send(channel, msg)?;
         debug!("Sent Message1");
+        Ok(())
     }
 
     /// Send Transfer Proof to Bob.

swap/src/protocol/alice/encrypted_signature.rs

@@ -82,7 +82,10 @@ impl NetworkBehaviourEventProcess<RequestResponseEvent<Request, Response>> for B
                     debug!("Received encrypted signature");
                     self.events.push_back(OutEvent::Msg(*msg));
                     // Send back empty response so that the request/response protocol completes.
-                    let _ = self.rr.send_response(channel, Response::EncryptedSignature);
+                    if let Err(error) = self.rr.send_response(channel, Response::EncryptedSignature)
+                    {
+                        error!("Failed to sen Encrypted Signature ack: {:?}", error);
+                    }
                 }
             }
             RequestResponseEvent::Message {
@@ -95,6 +98,9 @@ impl NetworkBehaviourEventProcess<RequestResponseEvent<Request, Response>> for B
             RequestResponseEvent::OutboundFailure { error, .. } => {
                 error!("Outbound failure: {:?}", error);
             }
+            RequestResponseEvent::ResponseSent { .. } => {
+                debug!("Alice has sent an Message3 response to Bob");
+            }
         }
     }
 }

swap/src/protocol/alice/event_loop.rs

@@ -8,12 +8,11 @@ use crate::{
     },
 };
 use anyhow::{anyhow, Context, Result};
-use futures::FutureExt;
 use libp2p::{
-    core::Multiaddr, futures::StreamExt, request_response::ResponseChannel, PeerId, Swarm,
+    core::Multiaddr, futures::FutureExt, request_response::ResponseChannel, PeerId, Swarm,
 };
 use tokio::sync::mpsc::{Receiver, Sender};
-use tracing::trace;
+use tracing::{error, trace};
 
 #[allow(missing_debug_implementations)]
 pub struct Channels<T> {
@@ -227,24 +226,33 @@ impl EventLoop {
                         }
                     }
                 },
-                swap_response = self.send_swap_response.next().fuse() => {
+                swap_response = self.send_swap_response.recv().fuse() => {
                     if let Some((channel, swap_response)) = swap_response  {
-                        self.swarm.send_swap_response(channel, swap_response);
+                        let _ = self
+                            .swarm
+                            .send_swap_response(channel, swap_response)
+                            .map_err(|err|error!("Failed to send swap response: {:#}", err));
                     }
                 },
-                msg0 = self.send_message0.next().fuse() => {
+                msg0 = self.send_message0.recv().fuse() => {
                     if let Some((channel, msg)) = msg0  {
-                        self.swarm.send_message0(channel, msg);
+                        let _ = self
+                            .swarm
+                            .send_message0(channel, msg)
+                            .map_err(|err|error!("Failed to send message0: {:#}", err));
                     }
                 },
-                msg1 = self.send_message1.next().fuse() => {
+                msg1 = self.send_message1.recv().fuse() => {
                     if let Some((channel, msg)) = msg1  {
-                        self.swarm.send_message1(channel, msg);
+                        let _ = self
+                            .swarm
+                            .send_message1(channel, msg)
+                            .map_err(|err|error!("Failed to send message1: {:#}", err));
                     }
                 },
-                transfer_proof = self.send_transfer_proof.next().fuse() => {
+                transfer_proof = self.send_transfer_proof.recv().fuse() => {
                     if let Some((bob_peer_id, msg)) = transfer_proof  {
-                        self.swarm.send_transfer_proof(bob_peer_id, msg);
+                      self.swarm.send_transfer_proof(bob_peer_id, msg)
                     }
                 },
             }

swap/src/protocol/alice/message0.rs

@@ -3,6 +3,7 @@ use crate::{
     network::request_response::{AliceToBob, BobToAlice, Codec, Message0Protocol, TIMEOUT},
     protocol::bob,
 };
+use anyhow::{anyhow, Result};
 use libp2p::{
     request_response::{
         handler::RequestProtocol, ProtocolSupport, RequestResponse, RequestResponseConfig,
@@ -49,9 +50,11 @@ pub struct Behaviour {
 }
 
 impl Behaviour {
-    pub fn send(&mut self, channel: ResponseChannel<AliceToBob>, msg: Message0) {
+    pub fn send(&mut self, channel: ResponseChannel<AliceToBob>, msg: Message0) -> Result<()> {
         let msg = AliceToBob::Message0(Box::new(msg));
-        self.rr.send_response(channel, msg);
+        self.rr
+            .send_response(channel, msg)
+            .map_err(|_| anyhow!("Sending Amounts response failed"))
     }
     fn poll(
         &mut self,
@@ -108,6 +111,9 @@ impl NetworkBehaviourEventProcess<RequestResponseEvent<BobToAlice, AliceToBob>>
             RequestResponseEvent::OutboundFailure { error, .. } => {
                 error!("Outbound failure: {:?}", error);
             }
+            RequestResponseEvent::ResponseSent { .. } => {
+                debug!("Alice has sent an Message0 response to Bob");
+            }
         }
     }
 }

swap/src/protocol/alice/message1.rs

@@ -2,6 +2,7 @@ use crate::{
     network::request_response::{AliceToBob, BobToAlice, Codec, Message1Protocol, TIMEOUT},
     protocol::bob,
 };
+use anyhow::{anyhow, Result};
 use ecdsa_fun::{adaptor::EncryptedSignature, Signature};
 use libp2p::{
     request_response::{
@@ -46,9 +47,11 @@ pub struct Behaviour {
 }
 
 impl Behaviour {
-    pub fn send(&mut self, channel: ResponseChannel<AliceToBob>, msg: Message1) {
+    pub fn send(&mut self, channel: ResponseChannel<AliceToBob>, msg: Message1) -> Result<()> {
         let msg = AliceToBob::Message1(Box::new(msg));
-        self.rr.send_response(channel, msg);
+        self.rr
+            .send_response(channel, msg)
+            .map_err(|_| anyhow!("Sending Amounts response failed"))
     }
 
     fn poll(
@@ -106,6 +109,9 @@ impl NetworkBehaviourEventProcess<RequestResponseEvent<BobToAlice, AliceToBob>>
             RequestResponseEvent::OutboundFailure { error, .. } => {
                 error!("Outbound failure: {:?}", error);
             }
+            RequestResponseEvent::ResponseSent { .. } => {
+                debug!("Alice has sent an Message1 response to Bob");
+            }
         }
     }
 }

swap/src/protocol/alice/message2.rs

@@ -96,6 +96,9 @@ impl NetworkBehaviourEventProcess<RequestResponseEvent<BobToAlice, AliceToBob>>
             RequestResponseEvent::OutboundFailure { error, .. } => {
                 error!("Outbound failure: {:?}", error);
             }
+            RequestResponseEvent::ResponseSent { .. } => {
+                debug!("Alice has sent an Message2 response to Bob");
+            }
         }
     }
 }

swap/src/protocol/alice/swap_response.rs

@@ -1,3 +1,4 @@
+use anyhow::{anyhow, Result};
 use libp2p::{
     request_response::{
         handler::RequestProtocol, ProtocolSupport, RequestResponse, RequestResponseConfig,
@@ -44,9 +45,11 @@ pub struct Behaviour {
 
 impl Behaviour {
     /// Alice always sends her messages as a response to a request from Bob.
-    pub fn send(&mut self, channel: ResponseChannel<AliceToBob>, msg: SwapResponse) {
+    pub fn send(&mut self, channel: ResponseChannel<AliceToBob>, msg: SwapResponse) -> Result<()> {
         let msg = AliceToBob::SwapResponse(Box::new(msg));
-        self.rr.send_response(channel, msg);
+        self.rr
+            .send_response(channel, msg)
+            .map_err(|_| anyhow!("Sending swap response failed"))
     }
 
     fn poll(
@@ -105,6 +108,9 @@ impl NetworkBehaviourEventProcess<RequestResponseEvent<BobToAlice, AliceToBob>>
             RequestResponseEvent::OutboundFailure { error, .. } => {
                 error!("Outbound failure: {:?}", error);
             }
+            RequestResponseEvent::ResponseSent { .. } => {
+                debug!("Alice has sent an Amounts response to Bob");
+            }
         }
     }
 }

swap/src/protocol/alice/transfer_proof.rs

@@ -97,6 +97,7 @@ impl NetworkBehaviourEventProcess<RequestResponseEvent<Request, Response>> for B
             RequestResponseEvent::OutboundFailure { error, .. } => {
                 error!("Outbound failure: {:?}", error);
             }
+            RequestResponseEvent::ResponseSent { .. } => {}
         }
     }
 }

swap/src/protocol/bob.rs

@@ -173,8 +173,8 @@ impl Builder {
         bob::event_loop::EventLoop::new(
             bob_transport,
             bob_behaviour,
-            self.peer_id.clone(),
+            self.peer_id,
-            self.alice_peer_id.clone(),
+            self.alice_peer_id,
             self.alice_address.clone(),
         )
     }
@@ -289,7 +289,7 @@ pub struct Behaviour {
 impl Behaviour {
     /// Sends a swap request to Alice to negotiate the swap.
     pub fn send_swap_request(&mut self, alice: PeerId, swap_request: SwapRequest) {
-        let _id = self.swap_request.send(alice.clone(), swap_request);
+        let _id = self.swap_request.send(alice, swap_request);
         info!("Requesting swap from: {}", alice);
     }
 

swap/src/protocol/bob/encrypted_signature.rs

@@ -96,6 +96,9 @@ impl NetworkBehaviourEventProcess<RequestResponseEvent<Request, Response>> for B
             RequestResponseEvent::OutboundFailure { error, .. } => {
                 error!("Outbound failure: {:?}", error);
             }
+            RequestResponseEvent::ResponseSent { .. } => {
+                unreachable!("Bob should never send a Amounts response to Alice");
+            }
         }
     }
 }

swap/src/protocol/bob/event_loop.rs

@@ -10,10 +10,7 @@ use crate::{
 use anyhow::{anyhow, Result};
 use futures::FutureExt;
 use libp2p::{core::Multiaddr, PeerId};
-use tokio::{
+use tokio::sync::mpsc::{Receiver, Sender};
-    stream::StreamExt,
-    sync::mpsc::{Receiver, Sender},
-};
 use tracing::{debug, error, info};
 
 #[derive(Debug)]
@@ -153,7 +150,7 @@ impl EventLoop {
             }))
             .build();
 
-        swarm.add_address(alice_peer_id.clone(), alice_addr);
+        swarm.add_address(alice_peer_id, alice_addr);
 
         let swap_response = Channels::new();
         let recv_message0 = Channels::new();
@@ -224,9 +221,9 @@ impl EventLoop {
                         OutEvent::EncryptedSignature => info!("Alice acknowledged encrypted signature received"),
                     }
                 },
-                option = self.dial_alice.next().fuse() => {
+                option = self.dial_alice.recv().fuse() => {
                     if option.is_some() {
-                           let peer_id = self.alice_peer_id.clone();
+                           let peer_id = self.alice_peer_id;
                         if self.swarm.pt.is_connected(&peer_id) {
                             debug!("Already connected to Alice: {}", peer_id);
                             let _ = self.conn_established.send(peer_id).await;
@@ -240,31 +237,31 @@ impl EventLoop {
                         }
                     }
                 },
-                swap_request = self.send_swap_request.next().fuse() =>  {
+                swap_request = self.send_swap_request.recv().fuse() =>  {
                     if let Some(swap_request) = swap_request {
-                        self.swarm.send_swap_request(self.alice_peer_id.clone(), swap_request);
+                        self.swarm.send_swap_request(self.alice_peer_id, swap_request);
                     }
                 },
 
-                msg0 = self.send_message0.next().fuse() => {
+                msg0 = self.send_message0.recv().fuse() => {
                     if let Some(msg) = msg0 {
-                        self.swarm.send_message0(self.alice_peer_id.clone(), msg);
+                        self.swarm.send_message0(self.alice_peer_id, msg);
                     }
                 }
 
-                msg1 = self.send_message1.next().fuse() => {
+                msg1 = self.send_message1.recv().fuse() => {
                     if let Some(msg) = msg1 {
-                        self.swarm.send_message1(self.alice_peer_id.clone(), msg);
+                        self.swarm.send_message1(self.alice_peer_id, msg);
                     }
                 },
-                msg2 = self.send_message2.next().fuse() => {
+                msg2 = self.send_message2.recv().fuse() => {
                     if let Some(msg) = msg2 {
-                        self.swarm.send_message2(self.alice_peer_id.clone(), msg);
+                        self.swarm.send_message2(self.alice_peer_id, msg);
                     }
                 },
-                encrypted_signature = self.send_encrypted_signature.next().fuse() => {
+                encrypted_signature = self.send_encrypted_signature.recv().fuse() => {
                     if let Some(tx_redeem_encsig) = encrypted_signature {
-                        self.swarm.send_encrypted_signature(self.alice_peer_id.clone(), tx_redeem_encsig);
+                        self.swarm.send_encrypted_signature(self.alice_peer_id, tx_redeem_encsig);
                     }
                 }
             }

swap/src/protocol/bob/message0.rs

@@ -102,6 +102,9 @@ impl NetworkBehaviourEventProcess<RequestResponseEvent<BobToAlice, AliceToBob>>
             RequestResponseEvent::OutboundFailure { error, .. } => {
                 error!("Outbound failure: {:?}", error);
             }
+            RequestResponseEvent::ResponseSent { .. } => {
+                unreachable!("Bob should never send a Amounts response to Alice");
+            }
         }
     }
 }

swap/src/protocol/bob/message1.rs

@@ -97,6 +97,9 @@ impl NetworkBehaviourEventProcess<RequestResponseEvent<BobToAlice, AliceToBob>>
             RequestResponseEvent::OutboundFailure { error, .. } => {
                 error!("Outbound failure: {:?}", error);
             }
+            RequestResponseEvent::ResponseSent { .. } => {
+                unreachable!("Bob should never send a Amounts response to Alice");
+            }
         }
     }
 }

swap/src/protocol/bob/message2.rs

@@ -95,6 +95,9 @@ impl NetworkBehaviourEventProcess<RequestResponseEvent<BobToAlice, AliceToBob>>
             RequestResponseEvent::OutboundFailure { error, .. } => {
                 error!("Outbound failure: {:?}", error);
             }
+            RequestResponseEvent::ResponseSent { .. } => {
+                unreachable!("Bob should never send a Amounts response to Alice");
+            }
         }
     }
 }

swap/src/protocol/bob/swap_request.rs

@@ -103,6 +103,9 @@ impl NetworkBehaviourEventProcess<RequestResponseEvent<BobToAlice, AliceToBob>>
             RequestResponseEvent::OutboundFailure { error, .. } => {
                 error!("Outbound failure: {:?}", error);
             }
+            RequestResponseEvent::ResponseSent { .. } => {
+                error!("Bob should never send a Amounts response to Alice");
+            }
         }
     }
 }

swap/src/protocol/bob/transfer_proof.rs

@@ -92,6 +92,7 @@ impl NetworkBehaviourEventProcess<RequestResponseEvent<Request, Response>> for B
             RequestResponseEvent::OutboundFailure { error, .. } => {
                 error!("Outbound failure: {:?}", error);
             }
+            RequestResponseEvent::ResponseSent { .. } => debug!("Bob ack'd transfer proof message"),
         }
     }
 }

swap/src/trace.rs

@@ -4,7 +4,7 @@ use tracing::{info, subscriber};
 use tracing_log::LogTracer;
 use tracing_subscriber::FmtSubscriber;
 
-pub fn init_tracing(level: log::LevelFilter) -> anyhow::Result<()> {
+pub fn init_tracing(level: LevelFilter) -> anyhow::Result<()> {
     if level == LevelFilter::Off {
         return Ok(());
     }
@@ -15,8 +15,8 @@ pub fn init_tracing(level: log::LevelFilter) -> anyhow::Result<()> {
     let is_terminal = atty::is(atty::Stream::Stderr);
     let subscriber = FmtSubscriber::builder()
         .with_env_filter(format!(
-            "swap={},xmr_btc={},monero_harness={},bitcoin_harness={},http=warn,warp=warn",
+            "swap={},monero_harness={},bitcoin_harness={},http=warn,warp=warn",
-            level, level, level, level
+            level, level, level,
         ))
         .with_writer(std::io::stderr)
         .with_ansi(is_terminal)

swap/tests/testutils/mod.rs

@@ -73,7 +73,7 @@ impl BobParams {
             self.bitcoin_wallet.clone(),
             self.monero_wallet.clone(),
             self.alice_address.clone(),
-            self.alice_peer_id.clone(),
+            self.alice_peer_id,
             self.config,
         )
     }