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61 lines
1.8 KiB
Rust
61 lines
1.8 KiB
Rust
use crate::{
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bitcoin::{timelocks::ExpiredTimelocks, Txid, Wallet},
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database::{Database, Swap},
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protocol::bob::BobState,
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};
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use anyhow::{bail, Result};
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use std::sync::Arc;
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use uuid::Uuid;
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#[derive(Debug, thiserror::Error, Clone, Copy)]
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pub enum CancelError {
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#[error("The cancel timelock has not expired yet.")]
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CancelTimelockNotExpiredYet,
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#[error("The cancel transaction has already been published.")]
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CancelTxAlreadyPublished,
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}
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pub async fn cancel(
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swap_id: Uuid,
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state: BobState,
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bitcoin_wallet: Arc<Wallet>,
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db: Database,
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) -> Result<Result<(Txid, BobState), CancelError>> {
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let state4 = match state {
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BobState::BtcLocked(state3) => state3.state4(),
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BobState::XmrLockProofReceived { state, .. } => state.state4(),
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BobState::XmrLocked(state4) => state4,
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BobState::EncSigSent(state4) => state4,
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BobState::CancelTimelockExpired(state4) => state4,
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_ => bail!(
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"Cannot cancel swap {} because it is in state {} which is not refundable.",
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swap_id,
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state
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),
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};
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if let ExpiredTimelocks::None = state4.expired_timelock(bitcoin_wallet.as_ref()).await? {
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return Ok(Err(CancelError::CancelTimelockNotExpiredYet));
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}
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if state4
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.check_for_tx_cancel(bitcoin_wallet.as_ref())
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.await
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.is_ok()
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{
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let state = BobState::BtcCancelled(state4);
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let db_state = state.into();
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db.insert_latest_state(swap_id, Swap::Bob(db_state)).await?;
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return Ok(Err(CancelError::CancelTxAlreadyPublished));
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}
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let txid = state4.submit_tx_cancel(bitcoin_wallet.as_ref()).await?;
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let state = BobState::BtcCancelled(state4);
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let db_state = state.clone().into();
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db.insert_latest_state(swap_id, Swap::Bob(db_state)).await?;
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Ok(Ok((txid, state)))
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}
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