Introduce test where alice restart mid-swap

swap/tests/alice_safe_restart.rs

@@ -0,0 +1,199 @@
+use bitcoin_harness::Bitcoind;
+use futures::future::try_join;
+use libp2p::Multiaddr;
+use monero_harness::{image, Monero};
+use rand::rngs::OsRng;
+use std::sync::Arc;
+use swap::{
+    alice, alice::swap::AliceState, bitcoin, bob, bob::swap::BobState, monero,
+    network::transport::build, storage::Database, SwapAmounts, PUNISH_TIMELOCK, REFUND_TIMELOCK,
+};
+use tempfile::{tempdir, TempDir};
+use testcontainers::{clients::Cli, Container};
+use uuid::Uuid;
+use xmr_btc::cross_curve_dleq;
+
+fn setup_tracing() {
+    use tracing_subscriber::util::SubscriberInitExt as _;
+    let _guard = tracing_subscriber::fmt()
+        .with_env_filter("swap=info,xmr_btc=info")
+        .with_ansi(false)
+        .set_default();
+}
+
+// This is just to keep the container alive
+#[allow(dead_code)]
+struct Containers<'a> {
+    bitcoind: Bitcoind<'a>,
+    monerods: Vec<Container<'a, Cli, image::Monero>>,
+}
+
+/// Returns Alice's and Bob's wallets, in this order
+async fn setup_wallets(
+    cli: &Cli,
+    _init_btc_alice: bitcoin::Amount,
+    init_xmr_alice: monero::Amount,
+    init_btc_bob: bitcoin::Amount,
+    init_xmr_bob: monero::Amount,
+) -> (
+    bitcoin::Wallet,
+    monero::Wallet,
+    bitcoin::Wallet,
+    monero::Wallet,
+    Containers<'_>,
+) {
+    let bitcoind = Bitcoind::new(&cli, "0.19.1").unwrap();
+    let _ = bitcoind.init(5).await;
+
+    let alice_btc_wallet = swap::bitcoin::Wallet::new("alice", bitcoind.node_url.clone())
+        .await
+        .unwrap();
+    let bob_btc_wallet = swap::bitcoin::Wallet::new("bob", bitcoind.node_url.clone())
+        .await
+        .unwrap();
+    bitcoind
+        .mint(bob_btc_wallet.0.new_address().await.unwrap(), init_btc_bob)
+        .await
+        .unwrap();
+
+    let (monero, monerods) = Monero::new(&cli, None, vec!["alice".to_string(), "bob".to_string()])
+        .await
+        .unwrap();
+    monero
+        .init(vec![
+            ("alice", init_xmr_alice.as_piconero()),
+            ("bob", init_xmr_bob.as_piconero()),
+        ])
+        .await
+        .unwrap();
+
+    let alice_xmr_wallet = swap::monero::Wallet(monero.wallet("alice").unwrap().client());
+    let bob_xmr_wallet = swap::monero::Wallet(monero.wallet("bob").unwrap().client());
+
+    (
+        alice_btc_wallet,
+        alice_xmr_wallet,
+        bob_btc_wallet,
+        bob_xmr_wallet,
+        Containers { bitcoind, monerods },
+    )
+}
+
+#[tokio::test]
+async fn alice_safe_restart_after_btc_is_locked() {
+    setup_tracing();
+
+    let alice_multiaddr: Multiaddr = "/ip4/127.0.0.1/tcp/9876"
+        .parse()
+        .expect("failed to parse Alice's address");
+
+    let btc_to_swap = bitcoin::Amount::from_sat(1_000_000);
+    let init_btc_alice = bitcoin::Amount::ZERO;
+    let init_btc_bob = btc_to_swap * 10;
+
+    let xmr_to_swap = monero::Amount::from_piconero(1_000_000_000_000);
+    let init_xmr_alice = xmr_to_swap * 10;
+    let init_xmr_bob = monero::Amount::ZERO;
+
+    let cli = Cli::default();
+    let (alice_btc_wallet, alice_xmr_wallet, bob_btc_wallet, bob_xmr_wallet, _containers) =
+        setup_wallets(
+            &cli,
+            init_btc_alice,
+            init_xmr_alice,
+            init_btc_bob,
+            init_xmr_bob,
+        )
+        .await;
+
+    let alice_btc_wallet = Arc::new(alice_btc_wallet);
+    let alice_xmr_wallet = Arc::new(alice_xmr_wallet);
+    let bob_btc_wallet = Arc::new(bob_btc_wallet);
+    let bob_xmr_wallet = Arc::new(bob_xmr_wallet);
+
+    let amounts = SwapAmounts {
+        btc: btc_to_swap,
+        xmr: xmr_to_swap,
+    };
+
+    let alice_behaviour = alice::Behaviour::default();
+    let alice_peer_id = alice_behaviour.peer_id().clone();
+    let alice_transport = build(alice_behaviour.identity()).unwrap();
+    let rng = &mut OsRng;
+    let alice_state = {
+        let a = bitcoin::SecretKey::new_random(rng);
+        let s_a = cross_curve_dleq::Scalar::random(rng);
+        let v_a = xmr_btc::monero::PrivateViewKey::new_random(rng);
+        AliceState::Started {
+            amounts,
+            a,
+            s_a,
+            v_a,
+        }
+    };
+    let alice_swarm =
+        alice::new_swarm(alice_multiaddr.clone(), alice_transport, alice_behaviour).unwrap();
+    let config = xmr_btc::config::Config::regtest();
+    let swap_id = Uuid::new_v4();
+    let tmp_dir = TempDir::new().unwrap();
+    let db = Database::open(tmp_dir.path()).unwrap();
+    let alice_swap = alice::swap::swap(
+        alice_state,
+        alice_swarm,
+        alice_btc_wallet.clone(),
+        alice_xmr_wallet.clone(),
+        config,
+        swap_id,
+        db,
+    );
+
+    let bob_db_dir = tempdir().unwrap();
+    let bob_db = Database::open(bob_db_dir.path()).unwrap();
+    let bob_behaviour = bob::Behaviour::default();
+    let bob_transport = build(bob_behaviour.identity()).unwrap();
+
+    let refund_address = bob_btc_wallet.new_address().await.unwrap();
+    let state0 = xmr_btc::bob::State0::new(
+        rng,
+        btc_to_swap,
+        xmr_to_swap,
+        REFUND_TIMELOCK,
+        PUNISH_TIMELOCK,
+        refund_address,
+    );
+    let bob_state = BobState::Started {
+        state0,
+        amounts,
+        peer_id: alice_peer_id,
+        addr: alice_multiaddr,
+    };
+    let bob_swarm = bob::new_swarm(bob_transport, bob_behaviour).unwrap();
+    let bob_swap = bob::swap::swap(
+        bob_state,
+        bob_swarm,
+        bob_db,
+        bob_btc_wallet.clone(),
+        bob_xmr_wallet.clone(),
+        OsRng,
+        Uuid::new_v4(),
+    );
+
+    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();
+
+    bob_xmr_wallet.as_ref().0.refresh().await.unwrap();
+    let xmr_bob_final = bob_xmr_wallet.as_ref().get_balance().await.unwrap();
+
+    assert_eq!(
+        btc_alice_final,
+        init_btc_alice + btc_to_swap - bitcoin::Amount::from_sat(bitcoin::TX_FEE)
+    );
+    assert!(btc_bob_final <= init_btc_bob - btc_to_swap);
+
+    assert!(xmr_alice_final <= init_xmr_alice - xmr_to_swap);
+    assert_eq!(xmr_bob_final, init_xmr_bob + xmr_to_swap);
+}