Finalize multisig payout even on missing address entry

The check for an address entry before finalizing the multisig payout
might prevent a valid payout when the initiation of the trade process
was interrupted. It's better to allow the completion of the trade
and just log a warning.

core/src/main/java/bisq/core/trade/protocol/tasks/seller/SellerSignAndFinalizePayoutTx.java

@@ -35,7 +35,6 @@
 
 import lombok.extern.slf4j.Slf4j;
 
-import static com.google.common.base.Preconditions.checkArgument;
 import static com.google.common.base.Preconditions.checkNotNull;
 
 @Slf4j
@@ -70,10 +69,21 @@ protected void run() {
             final byte[] buyerMultiSigPubKey = tradingPeer.getMultiSigPubKey();
             byte[] sellerMultiSigPubKey = processModel.getMyMultiSigPubKey();
 
-            Optional<AddressEntry> MultiSigAddressEntryOptional = walletService.getAddressEntry(id, AddressEntry.Context.MULTI_SIG);
-            checkArgument(MultiSigAddressEntryOptional.isPresent() && Arrays.equals(sellerMultiSigPubKey,
-                    MultiSigAddressEntryOptional.get().getPubKey()),
-                    "sellerMultiSigPubKey from AddressEntry must match the one from the trade data. trade id =" + id);
+            Optional<AddressEntry> multiSigAddressEntryOptional = walletService.getAddressEntry(id,
+                    AddressEntry.Context.MULTI_SIG);
+            if (!multiSigAddressEntryOptional.isPresent() || !Arrays.equals(sellerMultiSigPubKey,
+                    multiSigAddressEntryOptional.get().getPubKey())) {
+                // In some error edge cases it can be that the address entry is not marked (or was unmarked).
+                // We do not want to fail in that case and only report a warning.
+                // One case where that helped to avoid a failed payout attempt was when the taker had a power failure
+                // at the moment when the offer was taken. This caused first to not see step 1 in the trade process
+                // (all greyed out) but after the deposit tx was confirmed the trade process was on step 2 and
+                // everything looked ok. At the payout multiSigAddressEntryOptional was not present and payout
+                // could not be done. By changing the previous behaviour from fail if multiSigAddressEntryOptional
+                // is not present to only log a warning the payout worked.
+                log.warn("sellerMultiSigPubKey from AddressEntry does not match the one from the trade data. " +
+                        "Trade id ={}, multiSigAddressEntryOptional={}", id, multiSigAddressEntryOptional);
+            }
 
             DeterministicKey multiSigKeyPair = walletService.getMultiSigKeyPair(id, sellerMultiSigPubKey);