mirror of
https://github.com/comit-network/xmr-btc-swap.git
synced 2024-10-01 01:45:40 -04:00
252 lines
8.1 KiB
Rust
252 lines
8.1 KiB
Rust
pub mod harness;
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use std::{convert::TryInto, sync::Arc};
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use anyhow::Result;
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use async_trait::async_trait;
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use futures::{
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channel::mpsc::{channel, Receiver, Sender},
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future::try_join,
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SinkExt, StreamExt,
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};
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use genawaiter::GeneratorState;
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use harness::{
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init_bitcoind, init_test,
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node::{run_alice_until, run_bob_until},
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};
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use monero_harness::Monero;
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use rand::rngs::OsRng;
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use testcontainers::clients::Cli;
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use tracing::info;
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use xmr_btc::{
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action_generator_alice, action_generator_bob, alice,
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bitcoin::{BroadcastSignedTransaction, EncryptedSignature, SignTxLock},
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bob,
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monero::{CreateWalletForOutput, Transfer, TransferProof},
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AliceAction, BobAction, ReceiveBitcoinRedeemEncsig, ReceiveTransferProof,
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};
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type AliceNetwork = Network<EncryptedSignature>;
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type BobNetwork = Network<TransferProof>;
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#[derive(Debug)]
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struct Network<M> {
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// TODO: It is weird to use mpsc's in a situation where only one message is expected, but the
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// ownership rules of Rust are making this painful
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pub receiver: Receiver<M>,
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}
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impl<M> Network<M> {
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pub fn new() -> (Network<M>, Sender<M>) {
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let (sender, receiver) = channel(1);
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(Self { receiver }, sender)
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}
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}
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#[async_trait]
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impl ReceiveTransferProof for BobNetwork {
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async fn receive_transfer_proof(&mut self) -> TransferProof {
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self.receiver.next().await.unwrap()
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}
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}
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#[async_trait]
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impl ReceiveBitcoinRedeemEncsig for AliceNetwork {
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async fn receive_bitcoin_redeem_encsig(&mut self) -> EncryptedSignature {
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self.receiver.next().await.unwrap()
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}
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}
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async fn swap_as_alice(
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network: AliceNetwork,
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// FIXME: It would be more intuitive to have a single network/transport struct instead of
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// splitting into two, but Rust ownership rules make this tedious
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mut sender: Sender<TransferProof>,
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monero_wallet: &harness::wallet::monero::Wallet,
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bitcoin_wallet: Arc<harness::wallet::bitcoin::Wallet>,
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state: alice::State3,
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) -> Result<()> {
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let mut action_generator = action_generator_alice(network, bitcoin_wallet.clone(), state);
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loop {
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let state = action_generator.async_resume().await;
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info!("resumed execution of generator, got: {:?}", state);
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match state {
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GeneratorState::Yielded(AliceAction::LockXmr {
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amount,
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public_spend_key,
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public_view_key,
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}) => {
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let (transfer_proof, _) = monero_wallet
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.transfer(public_spend_key, public_view_key, amount)
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.await?;
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sender.send(transfer_proof).await.unwrap();
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}
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GeneratorState::Yielded(AliceAction::RedeemBtc(tx))
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| GeneratorState::Yielded(AliceAction::CancelBtc(tx))
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| GeneratorState::Yielded(AliceAction::PunishBtc(tx)) => {
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let _ = bitcoin_wallet.broadcast_signed_transaction(tx).await?;
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}
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GeneratorState::Yielded(AliceAction::CreateMoneroWalletForOutput {
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spend_key,
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view_key,
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}) => {
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monero_wallet
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.create_and_load_wallet_for_output(spend_key, view_key)
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.await?;
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}
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GeneratorState::Complete(()) => return Ok(()),
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}
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}
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}
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async fn swap_as_bob(
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network: BobNetwork,
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mut sender: Sender<EncryptedSignature>,
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monero_wallet: Arc<harness::wallet::monero::Wallet>,
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bitcoin_wallet: Arc<harness::wallet::bitcoin::Wallet>,
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state: bob::State2,
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) -> Result<()> {
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let mut action_generator = action_generator_bob(
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network,
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monero_wallet.clone(),
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bitcoin_wallet.clone(),
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state,
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);
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loop {
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let state = action_generator.async_resume().await;
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info!("resumed execution of generator, got: {:?}", state);
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match state {
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GeneratorState::Yielded(BobAction::LockBitcoin(tx_lock)) => {
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let signed_tx_lock = bitcoin_wallet.sign_tx_lock(tx_lock).await?;
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let _ = bitcoin_wallet
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.broadcast_signed_transaction(signed_tx_lock)
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.await?;
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}
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GeneratorState::Yielded(BobAction::SendBitcoinRedeemEncsig(tx_redeem_encsig)) => {
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sender.send(tx_redeem_encsig).await.unwrap();
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}
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GeneratorState::Yielded(BobAction::CreateMoneroWalletForOutput {
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spend_key,
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view_key,
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}) => {
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monero_wallet
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.create_and_load_wallet_for_output(spend_key, view_key)
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.await?;
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}
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GeneratorState::Yielded(BobAction::CancelBitcoin(tx_cancel)) => {
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let _ = bitcoin_wallet
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.broadcast_signed_transaction(tx_cancel)
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.await?;
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}
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GeneratorState::Yielded(BobAction::RefundBitcoin(tx_refund)) => {
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let _ = bitcoin_wallet
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.broadcast_signed_transaction(tx_refund)
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.await?;
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}
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GeneratorState::Complete(()) => return Ok(()),
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}
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}
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}
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// NOTE: For some reason running these tests overflows the stack. In order to
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// mitigate this run them with:
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//
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// RUST_MIN_STACK=100000000 cargo test
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#[tokio::test]
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async fn on_chain_happy_path() {
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let cli = Cli::default();
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let (monero, _container) = Monero::new(&cli);
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let bitcoind = init_bitcoind(&cli).await;
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let (alice_state0, bob_state0, mut alice_node, mut bob_node, initial_balances, swap_amounts) =
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init_test(&monero, &bitcoind, Some(100), Some(100)).await;
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// run the handshake as part of the setup
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let (alice_state, bob_state) = try_join(
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run_alice_until(
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&mut alice_node,
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alice_state0.into(),
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harness::alice::is_state3,
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&mut OsRng,
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),
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run_bob_until(
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&mut bob_node,
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bob_state0.into(),
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harness::bob::is_state2,
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&mut OsRng,
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),
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)
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.await
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.unwrap();
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let alice: alice::State3 = alice_state.try_into().unwrap();
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let bob: bob::State2 = bob_state.try_into().unwrap();
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let tx_lock_txid = bob.tx_lock.txid();
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let alice_bitcoin_wallet = Arc::new(alice_node.bitcoin_wallet);
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let bob_bitcoin_wallet = Arc::new(bob_node.bitcoin_wallet);
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let alice_monero_wallet = Arc::new(alice_node.monero_wallet);
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let bob_monero_wallet = Arc::new(bob_node.monero_wallet);
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let (alice_network, bob_sender) = Network::<EncryptedSignature>::new();
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let (bob_network, alice_sender) = Network::<TransferProof>::new();
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try_join(
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swap_as_alice(
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alice_network,
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alice_sender,
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&alice_monero_wallet.clone(),
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alice_bitcoin_wallet.clone(),
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alice,
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),
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swap_as_bob(
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bob_network,
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bob_sender,
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bob_monero_wallet.clone(),
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bob_bitcoin_wallet.clone(),
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bob,
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),
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)
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.await
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.unwrap();
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let alice_final_btc_balance = alice_bitcoin_wallet.balance().await.unwrap();
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let bob_final_btc_balance = bob_bitcoin_wallet.balance().await.unwrap();
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let lock_tx_bitcoin_fee = bob_bitcoin_wallet
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.transaction_fee(tx_lock_txid)
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.await
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.unwrap();
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let alice_final_xmr_balance = alice_monero_wallet.get_balance().await.unwrap();
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monero.wait_for_bob_wallet_block_height().await.unwrap();
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let bob_final_xmr_balance = bob_monero_wallet.get_balance().await.unwrap();
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assert_eq!(
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alice_final_btc_balance,
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initial_balances.alice_btc + swap_amounts.btc
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- bitcoin::Amount::from_sat(xmr_btc::bitcoin::TX_FEE)
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);
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assert_eq!(
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bob_final_btc_balance,
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initial_balances.bob_btc - swap_amounts.btc - lock_tx_bitcoin_fee
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);
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// Getting the Monero LockTx fee is tricky in a clean way, I think checking this
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// condition is sufficient
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assert!(alice_final_xmr_balance <= initial_balances.alice_xmr - swap_amounts.xmr,);
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assert_eq!(
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bob_final_xmr_balance,
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initial_balances.bob_xmr + swap_amounts.xmr
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);
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}
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