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synchronize reserving funds for open offer to fix race condition

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woodser 2024-04-21 07:39:40 -04:00
parent 9d9635ff50
commit f0862b7aeb
2 changed files with 38 additions and 26 deletions
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36
core/src/main/java/haveno/core/xmr/wallet/XmrWalletService.java
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@ -33,6 +33,8 @@ import haveno.common.util.Utilities;
import haveno.core.api.AccountServiceListener;
import haveno.core.api.CoreAccountService;
import haveno.core.api.XmrConnectionService;
import haveno.core.offer.Offer;
import haveno.core.offer.OfferDirection;
import haveno.core.offer.OpenOffer;
import haveno.core.trade.BuyerTrade;
import haveno.core.trade.HavenoUtils;
@ -546,6 +548,40 @@ public class XmrWalletService {
return new ArrayList<Integer>(subaddressIndices);
}
/**
* Create a reserve tx for an open offer and freeze its inputs.
*
* @param openOffer is the open offer to create a reserve tx for
*/
public MoneroTxWallet createReserveTx(OpenOffer openOffer) {
synchronized (walletLock) {
// collect offer data
Offer offer = openOffer.getOffer();
BigInteger penaltyFee = HavenoUtils.multiply(offer.getAmount(), offer.getPenaltyFeePct());
BigInteger makerFee = offer.getMaxMakerFee();
BigInteger sendAmount = offer.getDirection() == OfferDirection.BUY ? BigInteger.ZERO : offer.getAmount();
BigInteger securityDeposit = offer.getDirection() == OfferDirection.BUY ? offer.getMaxBuyerSecurityDeposit() : offer.getMaxSellerSecurityDeposit();
String returnAddress = getOrCreateAddressEntry(offer.getId(), XmrAddressEntry.Context.TRADE_PAYOUT).getAddressString();
XmrAddressEntry fundingEntry = getAddressEntry(offer.getId(), XmrAddressEntry.Context.OFFER_FUNDING).orElse(null);
Integer preferredSubaddressIndex = fundingEntry == null ? null : fundingEntry.getSubaddressIndex();
// create reserve tx
MoneroTxWallet reserveTx = createReserveTx(penaltyFee, makerFee, sendAmount, securityDeposit, returnAddress, openOffer.isReserveExactAmount(), preferredSubaddressIndex);
// collect reserved key images
List<String> reservedKeyImages = new ArrayList<String>();
for (MoneroOutput input : reserveTx.getInputs()) reservedKeyImages.add(input.getKeyImage().getHex());
// save offer state
openOffer.setReserveTxHash(reserveTx.getHash());
openOffer.setReserveTxHex(reserveTx.getFullHex());
openOffer.setReserveTxKey(reserveTx.getKey());
offer.getOfferPayload().setReserveTxKeyImages(reservedKeyImages);
return reserveTx;
}
}
/**
* Create the reserve tx and freeze its inputs. The full amount is returned
* to the sender's payout address less the penalty and mining fees.