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Check expiry before emitting first action

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This commit is contained in:
Lucas Soriano del Pino 2020-10-15 21:48:08 +11:00
parent df4ffb65c9
commit f0ecc62748
1 changed files with 20 additions and 11 deletions
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31
xmr-btc/src/lib.rs
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@ -55,7 +55,7 @@ use async_trait::async_trait;
use ecdsa_fun::{adaptor::Adaptor, nonce::Deterministic};
use futures::{
future::{select, Either},
FutureExt,
Future, FutureExt,
};
use genawaiter::sync::{Gen, GenBoxed};
use sha2::Sha256;
@ -121,24 +121,33 @@ where
InsufficientXMR(monero::InsufficientFunds),
}
async fn poll_until_bitcoin_time<B>(bitcoin_client: &B, timestamp: u32)
where
B: MedianTime,
{
async fn poll_until(condition_future: impl Future<Output = bool> + Clone) {
loop {
if bitcoin_client.median_time().await >= timestamp {
if condition_future.clone().await {
return;
}
}
}
async fn bitcoin_time_is_gte<B>(bitcoin_client: &B, timestamp: u32) -> bool
where
B: MedianTime,
{
bitcoin_client.median_time().await >= timestamp
}
Gen::new_boxed(|co| async move {
let swap_result: Result<(), SwapFailed> = async {
let btc_has_expired = bitcoin_time_is_gte(bitcoin_ledger, refund_timelock).shared();
if btc_has_expired.clone().await {
return Err(SwapFailed::TimelockReached);
}
co.yield_(Action::LockBitcoin(tx_lock.clone())).await;
let poll_until_expiry =
poll_until_bitcoin_time(bitcoin_ledger, refund_timelock).shared();
futures::pin_mut!(poll_until_expiry);
let poll_until_btc_has_expired = poll_until(btc_has_expired).shared();
futures::pin_mut!(poll_until_btc_has_expired);
// the source of this could be the database, this layer doesn't care
let transfer_proof = network.receive_transfer_proof();
@ -156,7 +165,7 @@ where
xmr,
monero::MIN_CONFIRMATIONS,
),
poll_until_expiry.clone(),
poll_until_btc_has_expired.clone(),
)
.await
{
@ -173,7 +182,7 @@ where
let tx_redeem_published = match select(
bitcoin_ledger.watch_for_raw_transaction(tx_redeem.txid()),
poll_until_expiry,
poll_until_btc_has_expired,
)
.await
{