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Handle arbitrator giving all payout to one trader
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parent
1f7daac389
commit
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@ -65,6 +65,7 @@ import com.google.common.base.Preconditions;
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import java.math.BigInteger;
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import java.util.Arrays;
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import java.util.List;
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import java.util.Optional;
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import java.util.UUID;
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@ -618,12 +619,10 @@ public final class ArbitrationManager extends DisputeManager<ArbitrationDisputeL
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// TODO (woodser): include arbitration fee
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//System.out.println("Creating feeEstimateTx!");
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MoneroTxWallet feeEstimateTx = multisigWallet.createTx(new MoneroTxConfig()
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.setAccountIndex(0)
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.addDestination(buyerPayoutAddress, buyerPayoutAmount.multiply(BigInteger.valueOf(4)).divide(BigInteger.valueOf(5))) // reduce payment amount to compute fee of similar tx
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.addDestination(sellerPayoutAddress, sellerPayoutAmount.multiply(BigInteger.valueOf(4)).divide(BigInteger.valueOf(5)))
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.setRelay(false)
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);
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MoneroTxConfig txConfig = new MoneroTxConfig().setAccountIndex(0).setRelay(false);
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if (buyerPayoutAmount.compareTo(BigInteger.ZERO) == 1) txConfig.addDestination(buyerPayoutAddress, buyerPayoutAmount.multiply(BigInteger.valueOf(4)).divide(BigInteger.valueOf(5))); // reduce payment amount to compute fee of similar tx
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if (sellerPayoutAmount.compareTo(BigInteger.ZERO) == 1) txConfig.addDestination(sellerPayoutAddress, sellerPayoutAmount.multiply(BigInteger.valueOf(4)).divide(BigInteger.valueOf(5)));
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MoneroTxWallet feeEstimateTx = multisigWallet.createTx(txConfig);
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System.out.println("Created fee estimate tx!");
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System.out.println(feeEstimateTx);
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@ -632,16 +631,21 @@ public final class ArbitrationManager extends DisputeManager<ArbitrationDisputeL
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// attempt to create payout tx by increasing estimated fee until successful
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MoneroTxWallet payoutTx = null;
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int numAttempts = 0;
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int feeDivisor = 0; // adjust fee divisor based on number of payout destinations
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if (buyerPayoutAmount.compareTo(BigInteger.ZERO) == 1) feeDivisor += 1;
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if (sellerPayoutAmount.compareTo(BigInteger.ZERO) == 1) feeDivisor += 1;
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while (payoutTx == null && numAttempts < 50) {
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BigInteger feeEstimate = feeEstimateTx.getFee().add(feeEstimateTx.getFee().multiply(BigInteger.valueOf(numAttempts)).divide(BigInteger.valueOf(10))); // add 1/10 of fee until tx is successful
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txConfig = new MoneroTxConfig().setAccountIndex(0).setRelay(false);
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if (buyerPayoutAmount.compareTo(BigInteger.ZERO) == 1) txConfig.addDestination(buyerPayoutAddress, buyerPayoutAmount.subtract(feeEstimate.divide(BigInteger.valueOf(feeDivisor)))); // split fee subtracted from each payout amount
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if (sellerPayoutAmount.compareTo(BigInteger.ZERO) == 1) txConfig.addDestination(sellerPayoutAddress, sellerPayoutAmount.subtract(feeEstimate.divide(BigInteger.valueOf(feeDivisor))));
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try {
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numAttempts++;
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payoutTx = multisigWallet.createTx(new MoneroTxConfig()
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.setAccountIndex(0)
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.addDestination(buyerPayoutAddress, buyerPayoutAmount.subtract(feeEstimate.divide(BigInteger.valueOf(2)))) // split fee subtracted from each payout amount
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.addDestination(sellerPayoutAddress, sellerPayoutAmount.subtract(feeEstimate.divide(BigInteger.valueOf(2))))
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.setRelay(false));
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payoutTx = multisigWallet.createTx(txConfig);
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} catch (MoneroError e) {
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System.out.println(e.toString());
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System.out.println(e.getStackTrace());
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// exception expected // TODO: better way of estimating fee?
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}
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}
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@ -677,32 +681,36 @@ public final class ArbitrationManager extends DisputeManager<ArbitrationDisputeL
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MoneroTxWallet arbitratorSignedPayoutTx = parsedTxSet.getTxs().get(0);
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System.out.println("Parsed arbitrator-signed payout tx:\n" + arbitratorSignedPayoutTx);
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// verify payout tx has exactly 2 destinations
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if (arbitratorSignedPayoutTx.getOutgoingTransfer() == null || arbitratorSignedPayoutTx.getOutgoingTransfer().getDestinations() == null || arbitratorSignedPayoutTx.getOutgoingTransfer().getDestinations().size() != 2) throw new RuntimeException("Buyer-signed payout tx does not have exactly two destinations");
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// verify payout tx has 1 or 2 destinations
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int numDestinations = arbitratorSignedPayoutTx.getOutgoingTransfer() == null || arbitratorSignedPayoutTx.getOutgoingTransfer().getDestinations() == null ? 0 : arbitratorSignedPayoutTx.getOutgoingTransfer().getDestinations().size();
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if (numDestinations != 1 && numDestinations != 2) throw new RuntimeException("Buyer-signed payout tx does not have 1 or 2 destinations");
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// get buyer and seller destinations (order not preserved)
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boolean buyerFirst = arbitratorSignedPayoutTx.getOutgoingTransfer().getDestinations().get(0).getAddress().equals(contract.getBuyerPayoutAddressString());
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MoneroDestination buyerPayoutDestination = arbitratorSignedPayoutTx.getOutgoingTransfer().getDestinations().get(buyerFirst ? 0 : 1);
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MoneroDestination sellerPayoutDestination = arbitratorSignedPayoutTx.getOutgoingTransfer().getDestinations().get(buyerFirst ? 1 : 0);
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List<MoneroDestination> destinations = arbitratorSignedPayoutTx.getOutgoingTransfer().getDestinations();
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boolean buyerFirst = destinations.get(0).getAddress().equals(contract.getBuyerPayoutAddressString());
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MoneroDestination buyerPayoutDestination = buyerFirst ? destinations.get(0) : numDestinations == 2 ? destinations.get(1) : null;
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MoneroDestination sellerPayoutDestination = buyerFirst ? (numDestinations == 2 ? destinations.get(1) : null) : destinations.get(0);
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// verify payout addresses
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if (!buyerPayoutDestination.getAddress().equals(contract.getBuyerPayoutAddressString())) throw new RuntimeException("Buyer payout address does not match contract");
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if (!sellerPayoutDestination.getAddress().equals(contract.getSellerPayoutAddressString())) throw new RuntimeException("Seller payout address does not match contract");
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if (buyerPayoutDestination != null && !buyerPayoutDestination.getAddress().equals(contract.getBuyerPayoutAddressString())) throw new RuntimeException("Buyer payout address does not match contract");
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if (sellerPayoutDestination != null && !sellerPayoutDestination.getAddress().equals(contract.getSellerPayoutAddressString())) throw new RuntimeException("Seller payout address does not match contract");
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// verify change address is multisig's primary address
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if (!arbitratorSignedPayoutTx.getChangeAddress().equals(multisigWallet.getPrimaryAddress())) throw new RuntimeException("Change address is not multisig wallet's primary address");
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// verify sum of outputs = destination amounts + change amount
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if (!arbitratorSignedPayoutTx.getOutputSum().equals(buyerPayoutDestination.getAmount().add(sellerPayoutDestination.getAmount()).add(arbitratorSignedPayoutTx.getChangeAmount()))) throw new RuntimeException("Sum of outputs != destination amounts + change amount");
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BigInteger destinationSum = (buyerPayoutDestination == null ? BigInteger.ZERO : buyerPayoutDestination.getAmount()).add(sellerPayoutDestination == null ? BigInteger.ZERO : sellerPayoutDestination.getAmount());
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if (!arbitratorSignedPayoutTx.getOutputSum().equals(destinationSum.add(arbitratorSignedPayoutTx.getChangeAmount()))) throw new RuntimeException("Sum of outputs != destination amounts + change amount");
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// verify buyer destination amount is payout amount - 1/2 tx costs
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BigInteger txCost = arbitratorSignedPayoutTx.getFee().add(arbitratorSignedPayoutTx.getChangeAmount());
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BigInteger expectedBuyerPayout = buyerPayoutAmount.subtract(txCost.divide(BigInteger.valueOf(2)));
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System.out.println("Dispute buyer payout amount: " + buyerPayoutAmount);
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System.out.println("Tx cost: " + txCost);
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System.out.println("Buyer destination payout amount: " + buyerPayoutDestination.getAmount());
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if (buyerPayoutDestination != null) {
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BigInteger txCost = arbitratorSignedPayoutTx.getFee().add(arbitratorSignedPayoutTx.getChangeAmount());
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BigInteger expectedBuyerPayout = buyerPayoutAmount.subtract(txCost.divide(BigInteger.valueOf(2)));
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System.out.println("Dispute buyer payout amount: " + buyerPayoutAmount);
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System.out.println("Tx cost: " + txCost);
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System.out.println("Buyer destination payout amount: " + buyerPayoutDestination.getAmount());
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}
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// payout amount is dispute payout amount - 1/2 tx cost - deposit tx fee
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