mirror of
https://github.com/comit-network/xmr-btc-swap.git
synced 2024-09-12 12:42:16 +00:00
153 lines
4.8 KiB
Rust
153 lines
4.8 KiB
Rust
use anyhow::Result;
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use async_trait::async_trait;
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use backoff::{future::FutureOperation as _, ExponentialBackoff};
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use monero::{Address, Network, PrivateKey};
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use monero_harness::Monero;
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use std::str::FromStr;
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use xmr_btc::monero::{
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Amount, CreateWalletForOutput, InsufficientFunds, PrivateViewKey, PublicKey, PublicViewKey,
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Transfer, TransferProof, TxHash, WatchForTransfer,
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};
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#[derive(Debug)]
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pub struct AliceWallet<'c>(pub &'c Monero<'c>);
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#[async_trait]
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impl Transfer for AliceWallet<'_> {
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async fn transfer(
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&self,
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public_spend_key: PublicKey,
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public_view_key: PublicViewKey,
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amount: Amount,
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) -> Result<(TransferProof, Amount)> {
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let destination_address =
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Address::standard(Network::Mainnet, public_spend_key, public_view_key.into());
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let res = self
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.0
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.transfer_from_alice(amount.as_piconero(), &destination_address.to_string())
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.await?;
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let tx_hash = TxHash(res.tx_hash);
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let tx_key = PrivateKey::from_str(&res.tx_key)?;
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let fee = Amount::from_piconero(res.fee);
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Ok((TransferProof::new(tx_hash, tx_key), fee))
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}
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}
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#[async_trait]
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impl CreateWalletForOutput for AliceWallet<'_> {
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async fn create_and_load_wallet_for_output(
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&self,
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private_spend_key: PrivateKey,
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private_view_key: PrivateViewKey,
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) -> Result<()> {
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let public_spend_key = PublicKey::from_private_key(&private_spend_key);
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let public_view_key = PublicKey::from_private_key(&private_view_key.into());
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let address = Address::standard(Network::Mainnet, public_spend_key, public_view_key);
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let _ = self
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.0
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.alice_wallet_rpc_client()
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.generate_from_keys(
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&address.to_string(),
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&private_spend_key.to_string(),
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&PrivateKey::from(private_view_key).to_string(),
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)
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.await?;
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Ok(())
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}
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}
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#[derive(Debug)]
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pub struct BobWallet<'c>(pub &'c Monero<'c>);
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#[async_trait]
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impl WatchForTransfer for BobWallet<'_> {
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async fn watch_for_transfer(
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&self,
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public_spend_key: PublicKey,
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public_view_key: PublicViewKey,
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transfer_proof: TransferProof,
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expected_amount: Amount,
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expected_confirmations: u32,
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) -> Result<(), InsufficientFunds> {
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enum Error {
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TxNotFound,
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InsufficientConfirmations,
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InsufficientFunds { expected: Amount, actual: Amount },
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}
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let wallet = self.0.bob_wallet_rpc_client();
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let address = Address::standard(Network::Mainnet, public_spend_key, public_view_key.into());
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let res = (|| async {
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// NOTE: Currently, this is conflating IO errors with the transaction not being
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// in the blockchain yet, or not having enough confirmations on it. All these
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// errors warrant a retry, but the strategy should probably differ per case
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let proof = wallet
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.check_tx_key(
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&String::from(transfer_proof.tx_hash()),
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&transfer_proof.tx_key().to_string(),
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&address.to_string(),
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)
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.await
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.map_err(|_| backoff::Error::Transient(Error::TxNotFound))?;
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if proof.received != expected_amount.as_piconero() {
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return Err(backoff::Error::Permanent(Error::InsufficientFunds {
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expected: expected_amount,
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actual: Amount::from_piconero(proof.received),
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}));
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}
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if proof.confirmations < expected_confirmations {
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return Err(backoff::Error::Transient(Error::InsufficientConfirmations));
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}
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Ok(proof)
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})
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.retry(ExponentialBackoff {
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max_elapsed_time: None,
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..Default::default()
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})
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.await;
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if let Err(Error::InsufficientFunds { expected, actual }) = res {
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return Err(InsufficientFunds { expected, actual });
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};
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Ok(())
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}
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}
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#[async_trait]
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impl CreateWalletForOutput for BobWallet<'_> {
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async fn create_and_load_wallet_for_output(
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&self,
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private_spend_key: PrivateKey,
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private_view_key: PrivateViewKey,
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) -> Result<()> {
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let public_spend_key = PublicKey::from_private_key(&private_spend_key);
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let public_view_key = PublicKey::from_private_key(&private_view_key.into());
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let address = Address::standard(Network::Mainnet, public_spend_key, public_view_key);
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let _ = self
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.0
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.bob_wallet_rpc_client()
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.generate_from_keys(
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&address.to_string(),
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&private_spend_key.to_string(),
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&PrivateKey::from(private_view_key).to_string(),
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)
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.await?;
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Ok(())
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}
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}
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