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67 lines
3.0 KiB
Rust
67 lines
3.0 KiB
Rust
use crate::bitcoin::{parse_rpc_error_code, RpcErrorCode, Txid, Wallet};
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use crate::database::{Database, Swap};
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use crate::protocol::alice::AliceState;
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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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pub async fn cancel(
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swap_id: Uuid,
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bitcoin_wallet: Arc<Wallet>,
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db: Arc<Database>,
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) -> Result<(Txid, AliceState)> {
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let state = db.get_state(swap_id)?.try_into_alice()?.into();
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let (monero_wallet_restore_blockheight, transfer_proof, state3) = match state {
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// In case no XMR has been locked, move to Safely Aborted
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AliceState::Started { .. }
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| AliceState::BtcLockTransactionSeen { .. }
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| AliceState::BtcLocked { .. } => bail!("Cannot cancel swap {} because it is in state {} where no XMR was locked.", swap_id, state),
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AliceState::XmrLockTransactionSent { monero_wallet_restore_blockheight, transfer_proof, state3, }
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| AliceState::XmrLocked { monero_wallet_restore_blockheight, transfer_proof, state3 }
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| AliceState::XmrLockTransferProofSent { monero_wallet_restore_blockheight, transfer_proof, state3 }
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// in cancel mode we do not care about the fact that we could redeem, but always wait for cancellation (leading either refund or punish)
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| AliceState::EncSigLearned { monero_wallet_restore_blockheight, transfer_proof, state3, .. }
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| AliceState::CancelTimelockExpired { monero_wallet_restore_blockheight, transfer_proof, state3}
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| AliceState::BtcCancelled { monero_wallet_restore_blockheight, transfer_proof, state3 }
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| AliceState::BtcRefunded { monero_wallet_restore_blockheight, transfer_proof, state3 ,.. }
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| AliceState::BtcPunishable { monero_wallet_restore_blockheight, transfer_proof, state3 } => {
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(monero_wallet_restore_blockheight, transfer_proof, state3)
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}
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// The redeem transaction was already published, it is not safe to cancel anymore
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AliceState::BtcRedeemTransactionPublished { .. } => bail!(" The redeem transaction was already published, it is not safe to cancel anymore"),
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// Alice already in final state
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| AliceState::BtcRedeemed
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| AliceState::XmrRefunded
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| AliceState::BtcPunished
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| AliceState::SafelyAborted => bail!("Swap is is in state {} which is not cancelable", state),
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};
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let txid = match state3.submit_tx_cancel(bitcoin_wallet.as_ref()).await {
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Ok(txid) => txid,
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Err(err) => {
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if let Ok(code) = parse_rpc_error_code(&err) {
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if code == i64::from(RpcErrorCode::RpcVerifyAlreadyInChain) {
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tracing::info!("Cancel transaction has already been confirmed on chain")
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}
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}
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bail!(err);
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}
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};
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let state = AliceState::BtcCancelled {
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monero_wallet_restore_blockheight,
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transfer_proof,
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state3,
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};
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let db_state = (&state).into();
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db.insert_latest_state(swap_id, Swap::Alice(db_state))
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.await?;
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Ok((txid, state))
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}
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