mirror of
https://github.com/comit-network/xmr-btc-swap.git
synced 2024-09-28 20:35:51 +00:00
277 lines
8.5 KiB
Rust
277 lines
8.5 KiB
Rust
use crate::monero::{
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Amount, CreateFrom, CreateFromAndLoad, InsufficientFunds, OpenOrCreate, OpenWallet,
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PrivateViewKey, PublicViewKey, Transfer, TransferProof, TxHash, WatchForTransfer,
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};
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use ::monero::{Address, Network, PrivateKey, PublicKey};
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use anyhow::{Context, Result};
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use async_trait::async_trait;
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use backoff::{backoff::Constant as ConstantBackoff, future::retry};
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use bitcoin::hashes::core::sync::atomic::AtomicU32;
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use monero_rpc::{
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wallet,
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wallet::{BlockHeight, Refreshed},
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};
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use std::{str::FromStr, sync::atomic::Ordering, time::Duration};
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use tokio::sync::Mutex;
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use tracing::{debug, info};
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use url::Url;
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#[derive(Debug)]
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pub struct Wallet {
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inner: Mutex<wallet::Client>,
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network: Network,
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name: String,
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}
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impl Wallet {
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pub fn new(url: Url, network: Network, name: String) -> Self {
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Self {
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inner: Mutex::new(wallet::Client::new(url)),
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network,
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name,
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}
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}
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pub fn new_with_client(client: wallet::Client, network: Network, name: String) -> Self {
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Self {
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inner: Mutex::new(client),
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network,
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name,
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}
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}
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/// Get the balance of the primary account.
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pub async fn get_balance(&self) -> Result<Amount> {
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let amount = self.inner.lock().await.get_balance(0).await?;
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Ok(Amount::from_piconero(amount))
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}
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pub async fn block_height(&self) -> Result<BlockHeight> {
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self.inner.lock().await.block_height().await
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}
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pub async fn get_main_address(&self) -> Result<Address> {
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let address = self.inner.lock().await.get_address(0).await?;
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Ok(Address::from_str(address.address.as_str())?)
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}
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pub async fn refresh(&self) -> Result<Refreshed> {
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self.inner.lock().await.refresh().await
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}
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pub async fn sweep_all(&self, address: Address) -> Result<Vec<TxHash>> {
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let sweep_all = self
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.inner
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.lock()
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.await
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.sweep_all(address.to_string().as_str())
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.await?;
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let tx_hashes = sweep_all.tx_hash_list.into_iter().map(TxHash).collect();
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Ok(tx_hashes)
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}
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pub fn static_tx_fee_estimate(&self) -> Amount {
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// Median tx fees on Monero as found here: https://www.monero.how/monero-transaction-fees, 0.000_015 * 2 (to be on the safe side)
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Amount::from_monero(0.000_03f64).expect("static fee to be convertible without problems")
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}
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}
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#[async_trait]
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impl Transfer for Wallet {
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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> {
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let destination_address =
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Address::standard(self.network, public_spend_key, public_view_key.into());
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let res = self
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.inner
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.lock()
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.await
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.transfer(0, amount.as_piconero(), &destination_address.to_string())
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.await?;
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tracing::debug!(
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"sent transfer of {} to {} in {}",
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amount,
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public_spend_key,
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res.tx_hash
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);
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Ok(TransferProof::new(
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TxHash(res.tx_hash),
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PrivateKey::from_str(&res.tx_key)?,
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))
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}
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}
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#[async_trait]
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impl CreateFromAndLoad for Wallet {
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async fn create_from_and_load(
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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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restore_height: BlockHeight,
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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(self.network, public_spend_key, public_view_key);
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let wallet = self.inner.lock().await;
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// Properly close the wallet before generating the other wallet to ensure that
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// it saves its state correctly
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let _ = wallet.close_wallet().await?;
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let _ = wallet
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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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restore_height.height,
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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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#[async_trait]
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impl CreateFrom for Wallet {
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async fn create_from(
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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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restore_height: BlockHeight,
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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(self.network, public_spend_key, public_view_key);
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let wallet = self.inner.lock().await;
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// Properly close the wallet before generating the other wallet to ensure that
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// it saves its state correctly
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let _ = wallet.close_wallet().await?;
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let _ = wallet
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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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restore_height.height,
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)
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.await?;
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let _ = wallet.open_wallet(self.name.as_str()).await?;
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Ok(())
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}
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}
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#[async_trait]
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impl OpenWallet for Wallet {
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async fn open(&self) -> Result<()> {
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self.inner
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.lock()
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.await
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.open_wallet(self.name.as_str())
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.await?;
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Ok(())
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}
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}
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#[async_trait]
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impl OpenOrCreate for Wallet {
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async fn open_or_create(&self) -> Result<()> {
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let open_wallet_response = self.open().await;
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if open_wallet_response.is_err() {
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self.inner.lock().await.create_wallet(self.name.as_str()).await.context(
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"Unable to create Monero wallet, please ensure that the monero-wallet-rpc is available",
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)?;
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debug!("Created Monero wallet {}", self.name);
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} else {
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debug!("Opened Monero wallet {}", self.name);
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}
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Ok(())
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}
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}
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// TODO: For retry, use `backoff::ExponentialBackoff` in production as opposed
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// to `ConstantBackoff`.
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#[async_trait]
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impl WatchForTransfer for Wallet {
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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 address = Address::standard(self.network, public_spend_key, public_view_key.into());
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let confirmations = AtomicU32::new(0u32);
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let res = retry(ConstantBackoff::new(Duration::from_secs(1)), || async {
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// NOTE: Currently, this is conflicting 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 = self
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.inner
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.lock()
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.await
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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 > confirmations.load(Ordering::SeqCst) {
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confirmations.store(proof.confirmations, Ordering::SeqCst);
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info!(
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"Monero lock tx received {} out of {} confirmations",
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proof.confirmations, expected_confirmations
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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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.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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