Merge #154

154: Clean up `lib.rs` r=D4nte a=D4nte

Do not remove it just yet as there are still issues with the CI but proceed with some clean up.

Merging this now to avoid further merge conflicts.

Co-authored-by: Franck Royer <franck@coblox.tech>

swap/src/bitcoin.rs

@@ -10,7 +10,7 @@ pub use ::bitcoin::{util::amount::Amount, Address, Network, Transaction, Txid};
 pub use ecdsa_fun::{adaptor::EncryptedSignature, fun::Scalar, Signature};
 pub use wallet::Wallet;
 
-use crate::{bitcoin::timelocks::BlockHeight, config::Config, ExpiredTimelocks};
+use crate::{bitcoin::timelocks::BlockHeight, config::Config};
 use ::bitcoin::{
     hashes::{hex::ToHex, Hash},
     secp256k1,
@@ -25,6 +25,7 @@ use rand::{CryptoRng, RngCore};
 use serde::{Deserialize, Serialize};
 use sha2::Sha256;
 use std::str::FromStr;
+use timelocks::ExpiredTimelocks;
 
 // TODO: Configurable tx-fee (note: parties have to agree prior to swapping)
 // Current reasoning:

swap/src/bitcoin/timelocks.rs

@@ -1,6 +1,7 @@
-use serde::{Deserialize, Serialize};
 use std::ops::Add;
 
+use serde::{Deserialize, Serialize};
+
 /// Represent a timelock, expressed in relative block height as defined in
 /// [BIP68](https://github.com/bitcoin/bips/blob/master/bip-0068.mediawiki).
 /// E.g. The timelock expires 10 blocks after the reference transaction is
@@ -47,3 +48,10 @@ impl Add<Timelock> for BlockHeight {
         BlockHeight(self.0 + rhs.0)
     }
 }
+
+#[derive(Debug, Clone, Copy)]
+pub enum ExpiredTimelocks {
+    None,
+    Cancel,
+    Punish,
+}

swap/src/database/alice.rs

@@ -2,8 +2,7 @@ use crate::{
     bitcoin::{EncryptedSignature, TxCancel, TxRefund},
     monero,
     monero::monero_private_key,
-    protocol::{alice, alice::AliceState},
-    SwapAmounts,
+    protocol::{alice, alice::AliceState, SwapAmounts},
 };
 use ::bitcoin::hashes::core::fmt::Display;
 use serde::{Deserialize, Serialize};

swap/src/database/bob.rs

@@ -1,7 +1,6 @@
 use crate::{
     monero::TransferProof,
-    protocol::{bob, bob::BobState},
-    SwapAmounts,
+    protocol::{bob, bob::BobState, SwapAmounts},
 };
 use ::bitcoin::hashes::core::fmt::Display;
 use monero_harness::rpc::wallet::BlockHeight;

swap/src/lib.rs

@@ -26,39 +26,3 @@ pub mod seed;
 pub mod trace;
 
 mod fs;
-
-use serde::{Deserialize, Serialize};
-use std::fmt::{self, Display};
-
-pub type Never = std::convert::Infallible;
-
-/// XMR/BTC swap amounts.
-#[derive(Copy, Clone, Debug, Serialize, Deserialize, PartialEq)]
-// TODO(Franck): review necessity of this struct
-pub struct SwapAmounts {
-    /// Amount of BTC to swap.
-    #[serde(with = "::bitcoin::util::amount::serde::as_sat")]
-    pub btc: bitcoin::Amount,
-    /// Amount of XMR to swap.
-    #[serde(with = "monero::monero_amount")]
-    pub xmr: monero::Amount,
-}
-
-// TODO: Display in XMR and BTC (not picos and sats).
-impl Display for SwapAmounts {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        write!(
-            f,
-            "{} sats for {} piconeros",
-            self.btc.as_sat(),
-            self.xmr.as_piconero()
-        )
-    }
-}
-
-#[derive(Debug, Clone, Copy)]
-pub enum ExpiredTimelocks {
-    None,
-    Cancel,
-    Punish,
-}

swap/src/main.rs

@@ -1,6 +1,5 @@
 #![warn(
     unused_extern_crates,
-    missing_debug_implementations,
     missing_copy_implementations,
     rust_2018_idioms,
     clippy::cast_possible_truncation,
@@ -15,22 +14,26 @@
 
 use crate::cli::{Command, Options, Resume};
 use anyhow::{Context, Result};
+use config::Config;
+use database::Database;
 use prettytable::{row, Table};
+use protocol::{alice, bob, bob::Builder, SwapAmounts};
 use std::sync::Arc;
 use structopt::StructOpt;
-use swap::{
-    bitcoin,
-    config::Config,
-    database::Database,
-    monero,
-    protocol::{alice, bob, bob::Builder},
-    trace::init_tracing,
-    SwapAmounts,
-};
+use trace::init_tracing;
 use tracing::{info, log::LevelFilter};
 use uuid::Uuid;
 
+pub mod bitcoin;
 mod cli;
+pub mod config;
+pub mod database;
+mod fs;
+pub mod monero;
+pub mod network;
+pub mod protocol;
+pub mod seed;
+pub mod trace;
 
 #[macro_use]
 extern crate prettytable;
@@ -49,7 +52,7 @@ async fn main() -> Result<()> {
     let data_dir = std::path::Path::new(opt.data_dir.as_str()).to_path_buf();
     let db_path = data_dir.join("database");
 
-    let seed = swap::config::seed::Seed::from_file_or_generate(&data_dir)
+    let seed = config::seed::Seed::from_file_or_generate(&data_dir)
         .expect("Could not retrieve/initialize seed")
         .into();
 
@@ -227,10 +230,9 @@ async fn setup_wallets(
     bitcoin_wallet_name: &str,
     monero_wallet_rpc_url: url::Url,
     config: Config,
-) -> Result<(swap::bitcoin::Wallet, swap::monero::Wallet)> {
+) -> Result<(bitcoin::Wallet, monero::Wallet)> {
     let bitcoin_wallet =
-        swap::bitcoin::Wallet::new(bitcoin_wallet_name, bitcoind_url, config.bitcoin_network)
-            .await?;
+        bitcoin::Wallet::new(bitcoin_wallet_name, bitcoind_url, config.bitcoin_network).await?;
     let bitcoin_balance = bitcoin_wallet.balance().await?;
     info!(
         "Connection to Bitcoin wallet succeeded, balance: {}",

swap/src/network/request_response.rs

@@ -1,3 +1,4 @@
+use crate::protocol::{alice, bob};
 use async_trait::async_trait;
 use futures::prelude::*;
 use libp2p::{
@@ -8,8 +9,6 @@ use serde::{Deserialize, Serialize};
 use std::{fmt::Debug, io, marker::PhantomData};
 use tracing::debug;
 
-use crate::protocol::{alice, bob};
-
 /// Time to wait for a response back once we send a request.
 pub const TIMEOUT: u64 = 3600; // One hour.
 

swap/src/protocol.rs

@@ -1,8 +1,35 @@
+use crate::monero;
+use bitcoin::hashes::core::{fmt, fmt::Display};
+use serde::{Deserialize, Serialize};
+
 pub mod alice;
 pub mod bob;
 
-#[derive(Debug, Clone)]
+#[derive(Debug, Copy, Clone)]
 pub struct StartingBalances {
     pub xmr: crate::monero::Amount,
     pub btc: bitcoin::Amount,
 }
+
+/// XMR/BTC swap amounts.
+#[derive(Copy, Clone, Debug, Serialize, Deserialize, PartialEq)]
+pub struct SwapAmounts {
+    /// Amount of BTC to swap.
+    #[serde(with = "::bitcoin::util::amount::serde::as_sat")]
+    pub btc: bitcoin::Amount,
+    /// Amount of XMR to swap.
+    #[serde(with = "monero::monero_amount")]
+    pub xmr: crate::monero::Amount,
+}
+
+// TODO: Display in XMR and BTC (not picos and sats).
+impl Display for SwapAmounts {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(
+            f,
+            "{} sats for {} piconeros",
+            self.btc.as_sat(),
+            self.xmr.as_piconero()
+        )
+    }
+}

swap/src/protocol/alice.rs

@@ -21,9 +21,8 @@ use crate::{
         transport::build,
         Seed as NetworkSeed,
     },
-    protocol::bob,
+    protocol::{bob, SwapAmounts},
     seed::Seed,
-    SwapAmounts,
 };
 use anyhow::{bail, Result};
 use libp2p::{

swap/src/protocol/alice/state.rs

@@ -1,14 +1,15 @@
 use crate::{
     bitcoin,
     bitcoin::{
-        current_epoch, timelocks::Timelock, wait_for_cancel_timelock_to_expire, GetBlockHeight,
-        TransactionBlockHeight, TxCancel, TxRefund, WatchForRawTransaction,
+        current_epoch,
+        timelocks::{ExpiredTimelocks, Timelock},
+        wait_for_cancel_timelock_to_expire, GetBlockHeight, TransactionBlockHeight, TxCancel,
+        TxRefund, WatchForRawTransaction,
     },
     monero,
     monero::CreateWalletForOutput,
     network::request_response::AliceToBob,
-    protocol::{alice, bob},
-    ExpiredTimelocks, SwapAmounts,
+    protocol::{alice, bob, SwapAmounts},
 };
 use anyhow::{anyhow, Context, Result};
 use ecdsa_fun::{

swap/src/protocol/alice/steps.rs

@@ -1,16 +1,3 @@
-use anyhow::{Context, Result};
-use ecdsa_fun::{adaptor::Adaptor, nonce::Deterministic};
-use futures::{
-    future::{select, Either},
-    pin_mut,
-};
-use libp2p::request_response::ResponseChannel;
-use rand::rngs::OsRng;
-use sha2::Sha256;
-use std::sync::Arc;
-use tokio::time::timeout;
-use tracing::{info, trace};
-
 use crate::{
     bitcoin,
     bitcoin::{
@@ -27,9 +14,21 @@ use crate::{
     protocol::{
         alice,
         alice::{event_loop::EventLoopHandle, SwapResponse},
+        SwapAmounts,
     },
-    SwapAmounts,
 };
+use anyhow::{Context, Result};
+use ecdsa_fun::{adaptor::Adaptor, nonce::Deterministic};
+use futures::{
+    future::{select, Either},
+    pin_mut,
+};
+use libp2p::request_response::ResponseChannel;
+use rand::rngs::OsRng;
+use sha2::Sha256;
+use std::sync::Arc;
+use tokio::time::timeout;
+use tracing::{info, trace};
 
 pub async fn negotiate(
     state0: alice::State0,

swap/src/protocol/alice/swap.rs

@@ -2,7 +2,10 @@
 //! Alice holds XMR and wishes receive BTC.
 use crate::{
     bitcoin,
-    bitcoin::{TransactionBlockHeight, WaitForTransactionFinality, WatchForRawTransaction},
+    bitcoin::{
+        timelocks::ExpiredTimelocks, TransactionBlockHeight, WaitForTransactionFinality,
+        WatchForRawTransaction,
+    },
     config::Config,
     database,
     database::Database,
@@ -22,7 +25,6 @@ use crate::{
             AliceState,
         },
     },
-    ExpiredTimelocks,
 };
 use anyhow::{bail, Result};
 use async_recursion::async_recursion;

swap/src/protocol/bob.rs

@@ -11,9 +11,8 @@ use crate::{
         peer_tracker::{self, PeerTracker},
         transport::build,
     },
-    protocol::{alice, bob},
+    protocol::{alice, bob, SwapAmounts},
     seed::Seed,
-    SwapAmounts,
 };
 use anyhow::{bail, Result};
 use libp2p::{core::Multiaddr, identity::Keypair, NetworkBehaviour, PeerId};

swap/src/protocol/bob/state.rs

@@ -1,14 +1,15 @@
 use crate::{
     bitcoin::{
-        self, current_epoch, timelocks::Timelock, wait_for_cancel_timelock_to_expire,
-        BroadcastSignedTransaction, BuildTxLockPsbt, GetBlockHeight, GetNetwork, GetRawTransaction,
-        Transaction, TransactionBlockHeight, TxCancel, Txid, WatchForRawTransaction,
+        self, current_epoch,
+        timelocks::{ExpiredTimelocks, Timelock},
+        wait_for_cancel_timelock_to_expire, BroadcastSignedTransaction, BuildTxLockPsbt,
+        GetBlockHeight, GetNetwork, GetRawTransaction, Transaction, TransactionBlockHeight,
+        TxCancel, Txid, WatchForRawTransaction,
     },
     config::Config,
     monero,
     monero::{monero_private_key, TransferProof},
-    protocol::{alice, bob},
-    ExpiredTimelocks, SwapAmounts,
+    protocol::{alice, bob, SwapAmounts},
 };
 use anyhow::{anyhow, Result};
 use ecdsa_fun::{

swap/src/protocol/bob/swap.rs

@@ -1,10 +1,13 @@
 use crate::{
     bitcoin,
+    bitcoin::timelocks::ExpiredTimelocks,
     config::Config,
     database::{Database, Swap},
     monero,
-    protocol::bob::{self, event_loop::EventLoopHandle, state::*, SwapRequest},
-    ExpiredTimelocks, SwapAmounts,
+    protocol::{
+        bob::{self, event_loop::EventLoopHandle, state::*, SwapRequest},
+        SwapAmounts,
+    },
 };
 use anyhow::{bail, Result};
 use async_recursion::async_recursion;

swap/src/protocol/bob/swap_request.rs

@@ -19,7 +19,7 @@ use std::{
 };
 use tracing::{debug, error};
 
-#[derive(Clone, Debug, Serialize, Deserialize)]
+#[derive(Clone, Copy, Debug, Serialize, Deserialize)]
 pub struct SwapRequest {
     #[serde(with = "::bitcoin::util::amount::serde::as_sat")]
     pub btc_amount: bitcoin::Amount,

swap/tests/testutils/mod.rs

@@ -9,9 +9,8 @@ use swap::{
     bitcoin,
     config::Config,
     monero,
-    protocol::{alice, alice::AliceState, bob, bob::BobState},
+    protocol::{alice, alice::AliceState, bob, bob::BobState, SwapAmounts},
     seed::Seed,
-    SwapAmounts,
 };
 use tempfile::tempdir;
 use testcontainers::{clients::Cli, Container};