Apollo: Release source code for 53.2

android/CHANGELOG.md

@@ -6,6 +6,12 @@ follow [https://changelog.md/](https://changelog.md/) guidelines.
 
 ## [Unreleased]
 
+## [53.2] - 2025-03-24
+
+### ADDED
+
+- Alternative transactions signing
+
 ## [53.1] - 2025-02-21
 
 ### ADDED

android/apollo/src/main/java/io/muun/apollo/data/net/ApiObjectsMapper.java

@@ -63,6 +63,7 @@
 import io.muun.common.utils.BitcoinUtils;
 import io.muun.common.utils.Encodings;
 import io.muun.common.utils.Pair;
+import io.muun.common.utils.Preconditions;
 
 import android.os.SystemClock;
 import androidx.annotation.NonNull;
@@ -144,16 +145,25 @@ private BitcoinAmountJson mapBitcoinAmount(@NotNull BitcoinAmount bitcoinAmount)
     public OperationJson mapOperation(
             final @NotNull OperationWithMetadata operation,
             final List<String> outpoints,
-            final MusigNonces musigNonces
+            final MusigNonces musigNonces,
+            final List<MusigNonces> alternativeTxNonces
     ) {
 
         final Long outputAmountInSatoshis = mapOutputAmountInSatoshis(operation);
 
         final List<String> userPublicNoncesHex = new LinkedList<>();
-        for (int i = 0; i < outpoints.size(); i++) {
+        final long noncesCount = musigNonces.length();
+        for (int i = 0; i < noncesCount; i++) {
             userPublicNoncesHex.add(musigNonces.getPubnonceHex(i));
         }
 
+        for (final MusigNonces nonces : alternativeTxNonces) {
+            Preconditions.checkState(noncesCount == nonces.length());
+            for (int i = 0; i < noncesCount; i++) {
+                userPublicNoncesHex.add(nonces.getPubnonceHex(i));
+            }
+        }
+
         return new OperationJson(
                 UUID.randomUUID().toString(),
                 operation.getDirection(),

android/apollo/src/main/java/io/muun/apollo/data/net/HoustonClient.java

@@ -62,11 +62,13 @@
 import io.muun.common.api.IntegrityStatus;
 import io.muun.common.api.KeySet;
 import io.muun.common.api.LinkActionJson;
+import io.muun.common.api.OperationJson;
 import io.muun.common.api.PasswordSetupJson;
 import io.muun.common.api.PhoneConfirmation;
 import io.muun.common.api.PlayIntegrityTokenJson;
 import io.muun.common.api.PreimageJson;
 import io.muun.common.api.PublicKeySetJson;
+import io.muun.common.api.PushTransactionsJson;
 import io.muun.common.api.RawTransaction;
 import io.muun.common.api.SetupChallengeResponse;
 import io.muun.common.api.UpdateOperationMetadataJson;
@@ -100,6 +102,7 @@
 import rx.Observable;
 import rx.Single;
 
+import java.util.ArrayList;
 import java.util.List;
 import javax.annotation.Nullable;
 import javax.inject.Inject;
@@ -603,10 +606,14 @@ public Observable<IntegrityStatus> checkIntegrity(IntegrityCheck integrityCheck)
     public Observable<OperationCreated> newOperation(
             final OperationWithMetadata operation,
             final List<String> outpoints,
-            final MusigNonces musigNonces
+            final MusigNonces musigNonces,
+            final List<MusigNonces> alternativeTxNonces
     ) {
+        final OperationJson operationJson =
+                apiMapper.mapOperation(operation, outpoints, musigNonces, alternativeTxNonces);
+
         return getService()
-                .newOperation(apiMapper.mapOperation(operation, outpoints, musigNonces))
+                .newOperation(operationJson)
                 .map(modelMapper::mapOperationCreated);
     }
 
@@ -623,29 +630,44 @@ public Completable updateOperationMetadata(OperationWithMetadata operation) {
 
     /**
      * Pushes a raw transaction to Houston.
-     *
-     * @param txHex        The bitcoinj's transaction.
-     * @param operationHid The houston operation id.
      */
-    public Observable<TransactionPushed> pushTransaction(
+    public Observable<TransactionPushed> pushTransactions(
             @Nullable String txHex,
+            @Nullable List<String> alternativeTransactionsHex,
             long operationHid
     ) {
+        final RawTransaction rawTransaction;
+        final ArrayList<RawTransaction> alternativeTransactions = new ArrayList<RawTransaction>();
+
         if (txHex != null) {
-            return getService()
-                    .pushTransaction(new RawTransaction(txHex), operationHid)
-                    // This can happen if we determine the payment can't actually be made. If so, we
-                    // fail fast to avoid broadcasting a transaction saving the user on miner fees.
-                    .compose(ObservableFn.replaceHttpException(
-                            ErrorCode.SWAP_FAILED,
-                            SwapFailedException::new
-                    ))
-                    .map(modelMapper::mapTransactionPushed);
+            Preconditions.checkArgument(alternativeTransactionsHex != null);
+
+            rawTransaction = new RawTransaction(txHex);
+
+            for (var transactionHex : alternativeTransactionsHex) {
+                alternativeTransactions.add(new RawTransaction(transactionHex));
+            }
+
         } else {
-            return getService()
-                    .pushTransaction(operationHid) // empty body when txHex is not given
-                    .map(modelMapper::mapTransactionPushed);
+            Preconditions.checkArgument(alternativeTransactionsHex == null);
+
+            rawTransaction = null;
         }
+
+        final var json = new PushTransactionsJson(
+                rawTransaction,
+                alternativeTransactions
+        );
+
+        return getService()
+                .pushTransactions(json, operationHid)
+                // This can happen if we determine the payment can't actually be made. If so, we
+                // fail fast to avoid broadcasting a transaction saving the user on miner fees.
+                .compose(ObservableFn.replaceHttpException(
+                        ErrorCode.SWAP_FAILED,
+                        SwapFailedException::new
+                ))
+                .map(modelMapper::mapTransactionPushed);
     }
 
     /**

android/apollo/src/main/java/io/muun/apollo/data/net/ModelObjectsMapper.java

@@ -53,6 +53,7 @@
 import io.muun.common.api.NextTransactionSizeJson;
 import io.muun.common.api.OperationCreatedJson;
 import io.muun.common.api.OperationJson;
+import io.muun.common.api.PartiallySignedTransactionJson;
 import io.muun.common.api.PendingChallengeUpdateJson;
 import io.muun.common.api.PhoneNumberJson;
 import io.muun.common.api.PublicKeySetJson;
@@ -377,10 +378,26 @@ public OperationCreated mapOperationCreated(@NotNull OperationCreatedJson operat
                         networkParameters
                 ),
                 mapNextTransactionSize(operationCreated.nextTransactionSize),
-                MuunAddress.fromJson(operationCreated.changeAddress)
+                MuunAddress.fromJson(operationCreated.changeAddress),
+                mapAlternativeTransactions(operationCreated.alternativeTransactions)
         );
     }
 
+    private List<PartiallySignedTransaction> mapAlternativeTransactions(
+            @Nullable final List<PartiallySignedTransactionJson> txs
+    ) {
+        if (txs == null) {
+            return List.of();
+        }
+
+        final var result = new ArrayList<PartiallySignedTransaction>();
+        for (final var tx : txs) {
+            result.add(PartiallySignedTransaction.fromJson(tx, networkParameters));
+        }
+
+        return result;
+    }
+
     /**
      * Create a TransactionPushed object.
      */