mirror of
https://github.com/comit-network/xmr-btc-swap.git
synced 2024-08-23 18:55:25 +00:00
137 lines
4.2 KiB
Rust
137 lines
4.2 KiB
Rust
use anyhow::Result;
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use async_trait::async_trait;
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use backoff::{backoff::Constant as ConstantBackoff, future::FutureOperation as _};
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use monero_harness::rpc::wallet;
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use std::{str::FromStr, time::Duration};
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use url::Url;
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pub use xmr_btc::monero::*;
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pub struct Wallet(pub wallet::Client);
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impl Wallet {
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pub fn new(url: Url) -> Self {
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Self(wallet::Client::new(url))
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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.0.get_balance(0).await?;
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Ok(Amount::from_piconero(amount))
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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, 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(0, 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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tracing::debug!("Monero tx broadcasted!, tx hash: {:?}", 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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let transfer_proof = TransferProof::new(tx_hash, tx_key);
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tracing::debug!(" Transfer proof: {:?}", transfer_proof);
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Ok((transfer_proof, fee))
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}
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}
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#[async_trait]
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impl CreateWalletForOutput for Wallet {
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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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.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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// 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(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 = self
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.0
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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(ConstantBackoff::new(Duration::from_secs(1)))
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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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