Fix: Duplicate messages when subscribe both accounts and proposed_accounts (#1415)

Fix #1134

src/etl/impl/SubscriptionSource.cpp

@@ -240,7 +240,11 @@ SubscriptionSource::handleMessage(std::string const& message)
 
         } else {
             if (isForwarding_) {
-                if (object.contains(JS(transaction))) {
+                // Clio as rippled's proposed_transactions subscirber, will receive two jsons for each transaction
+                // 1 - Proposed transaction
+                // 2 - Validated transaction
+                // Only forward proposed transaction, validated transactions are sent by Clio itself
+                if (object.contains(JS(transaction)) and !object.contains(JS(meta))) {
                     subscriptions_->forwardProposedTransaction(object);
                 } else if (object.contains(JS(type)) && object.at(JS(type)) == JS_ValidationReceived) {
                     subscriptions_->forwardValidation(object);

src/feed/SubscriptionManager.cpp

@@ -59,24 +59,32 @@ void
 SubscriptionManager::subProposedTransactions(SubscriberSharedPtr const& subscriber)
 {
     proposedTransactionFeed_.sub(subscriber);
+    // proposed_transactions subscribers not only receive the transaction json when it is proposed, but also the
+    // transaction json when it is validated. So the subscriber also subscribes to the transaction feed.
+    transactionFeed_.subProposed(subscriber);
 }
 
 void
 SubscriptionManager::unsubProposedTransactions(SubscriberSharedPtr const& subscriber)
 {
     proposedTransactionFeed_.unsub(subscriber);
+    transactionFeed_.unsubProposed(subscriber);
 }
 
 void
 SubscriptionManager::subProposedAccount(ripple::AccountID const& account, SubscriberSharedPtr const& subscriber)
 {
     proposedTransactionFeed_.sub(account, subscriber);
+    // Same as proposed_transactions subscribers, proposed_account subscribers also subscribe to the transaction feed to
+    // receive validated transaction feed. TransactionFeed class will filter out the sessions that have been sent to.
+    transactionFeed_.subProposed(account, subscriber);
 }
 
 void
 SubscriptionManager::unsubProposedAccount(ripple::AccountID const& account, SubscriberSharedPtr const& subscriber)
 {
     proposedTransactionFeed_.unsub(account, subscriber);
+    transactionFeed_.unsubProposed(account, subscriber);
 }
 
 void

src/feed/impl/ProposedTransactionFeed.cpp

@@ -102,6 +102,7 @@ ProposedTransactionFeed::pub(boost::json::object const& receivedTxJson)
     auto affectedAccounts = std::unordered_set<ripple::AccountID>(accounts.cbegin(), accounts.cend());
 
     boost::asio::post(strand_, [this, pubMsg = std::move(pubMsg), affectedAccounts = std::move(affectedAccounts)]() {
+        notified_.clear();
         signal_.emit(pubMsg);
         // Prevent the same connection from receiving the same message twice if it is subscribed to multiple accounts
         // However, if the same connection subscribe both stream and account, it will still receive the message twice.

src/feed/impl/TransactionFeed.cpp

@@ -93,6 +93,27 @@ TransactionFeed::sub(ripple::AccountID const& account, SubscriberSharedPtr const
     }
 }
 
+void
+TransactionFeed::subProposed(SubscriberSharedPtr const& subscriber)
+{
+    auto const added = txProposedsignal_.connectTrackableSlot(subscriber, TransactionSlot(*this, subscriber));
+    if (added) {
+        subscriber->onDisconnect.connect([this](SubscriberPtr connection) { unsubProposedInternal(connection); });
+    }
+}
+
+void
+TransactionFeed::subProposed(ripple::AccountID const& account, SubscriberSharedPtr const& subscriber)
+{
+    auto const added =
+        accountProposedSignal_.connectTrackableSlot(subscriber, account, TransactionSlot(*this, subscriber));
+    if (added) {
+        subscriber->onDisconnect.connect([this, account](SubscriberPtr connection) {
+            unsubProposedInternal(account, connection);
+        });
+    }
+}
+
 void
 TransactionFeed::sub(ripple::Book const& book, SubscriberSharedPtr const& subscriber)
 {
@@ -116,6 +137,18 @@ TransactionFeed::unsub(ripple::AccountID const& account, SubscriberSharedPtr con
     unsubInternal(account, subscriber.get());
 }
 
+void
+TransactionFeed::unsubProposed(SubscriberSharedPtr const& subscriber)
+{
+    unsubProposedInternal(subscriber.get());
+}
+
+void
+TransactionFeed::unsubProposed(ripple::AccountID const& account, SubscriberSharedPtr const& subscriber)
+{
+    unsubProposedInternal(account, subscriber.get());
+}
+
 void
 TransactionFeed::unsub(ripple::Book const& book, SubscriberSharedPtr const& subscriber)
 {
@@ -251,14 +284,19 @@ TransactionFeed::pub(
          affectedBooks = std::move(affectedBooks)]() {
             notified_.clear();
             signal_.emit(allVersionsMsgs);
+            // clear the notified set. If the same connection subscribes both transactions + proposed_transactions,
+            // rippled SENDS the same message twice
             notified_.clear();
-            // check duplicate for accounts, this prevents sending the same message multiple times if it touches
+            txProposedsignal_.emit(allVersionsMsgs);
-            // multiple accounts watched by the same connection
+            notified_.clear();
+            // check duplicate for account and proposed_account, this prevents sending the same message multiple times
+            // if it affects multiple accounts watched by the same connection
             for (auto const& account : affectedAccounts) {
                 accountSignal_.emit(account, allVersionsMsgs);
+                accountProposedSignal_.emit(account, allVersionsMsgs);
             }
             notified_.clear();
-            // check duplicate for books, this prevents sending the same message multiple times if it touches multiple
+            // check duplicate for books, this prevents sending the same message multiple times if it affects multiple
             // books watched by the same connection
             for (auto const& book : affectedBooks) {
                 bookSignal_.emit(book, allVersionsMsgs);
@@ -285,6 +323,18 @@ TransactionFeed::unsubInternal(ripple::AccountID const& account, SubscriberPtr s
     }
 }
 
+void
+TransactionFeed::unsubProposedInternal(SubscriberPtr subscriber)
+{
+    txProposedsignal_.disconnect(subscriber);
+}
+
+void
+TransactionFeed::unsubProposedInternal(ripple::AccountID const& account, SubscriberPtr subscriber)
+{
+    accountProposedSignal_.disconnect(subscriber, account);
+}
+
 void
 TransactionFeed::unsubInternal(ripple::Book const& book, SubscriberPtr subscriber)
 {

src/feed/impl/TransactionFeed.hpp

@@ -72,6 +72,10 @@ class TransactionFeed {
     TrackableSignalMap<ripple::Book, Subscriber, AllVersionTransactionsType const&> bookSignal_;
     TrackableSignal<Subscriber, AllVersionTransactionsType const&> signal_;
 
+    // Signals for proposed tx subscribers
+    TrackableSignalMap<ripple::AccountID, Subscriber, AllVersionTransactionsType const&> accountProposedSignal_;
+    TrackableSignal<Subscriber, AllVersionTransactionsType const&> txProposedsignal_;
+
     std::unordered_set<SubscriberPtr>
         notified_;  // Used by slots to prevent double notifications if tx contains multiple subscribed accounts
 
@@ -111,6 +115,22 @@ public:
     void
     sub(ripple::Book const& book, SubscriberSharedPtr const& subscriber);
 
+    /**
+     * @brief Subscribe to the transaction feed for proposed transaction stream.
+     * @param subscriber
+     */
+    void
+    subProposed(SubscriberSharedPtr const& subscriber);
+
+    /**
+     * @brief Subscribe to the transaction feed for proposed account, only receive the feed when particular account is
+     * affected.
+     * @param subscriber
+     * @param account The account to watch.
+     */
+    void
+    subProposed(ripple::AccountID const& account, SubscriberSharedPtr const& subscriber);
+
     /**
      * @brief Unsubscribe to the transaction feed.
      * @param subscriber
@@ -126,6 +146,21 @@ public:
     void
     unsub(ripple::AccountID const& account, SubscriberSharedPtr const& subscriber);
 
+    /**
+     * @brief Unsubscribe to the transaction feed for proposed transaction stream.
+     * @param subscriber
+     */
+    void
+    unsubProposed(SubscriberSharedPtr const& subscriber);
+
+    /**
+     * @brief Unsubscribe to the transaction for particular proposed account.
+     * @param subscriber
+     * @param account The account to unsubscribe.
+     */
+    void
+    unsubProposed(ripple::AccountID const& account, SubscriberSharedPtr const& subscriber);
+
     /**
      * @brief Unsubscribe to the transaction feed for particular order book.
      * @param subscriber
@@ -170,6 +205,12 @@ private:
     void
     unsubInternal(ripple::AccountID const& account, SubscriberPtr subscriber);
 
+    void
+    unsubProposedInternal(SubscriberPtr subscriber);
+
+    void
+    unsubProposedInternal(ripple::AccountID const& account, SubscriberPtr subscriber);
+
     void
     unsubInternal(ripple::Book const& book, SubscriberPtr subscriber);
 };

tests/unit/etl/SubscriptionSourceTests.cpp

@@ -444,6 +444,22 @@ TEST_F(SubscriptionSourceReadTests, GotTransactionIsForwardingTrue)
     ioContext_.run();
 }
 
+TEST_F(SubscriptionSourceReadTests, GotTransactionWithMetaIsForwardingFalse)
+{
+    subscriptionSource_.setForwarding(true);
+    boost::json::object const message = {{"transaction", "some_transaction_data"}, {"meta", "some_meta_data"}};
+
+    boost::asio::spawn(ioContext_, [&message, this](boost::asio::yield_context yield) {
+        auto connection = connectAndSendMessage(boost::json::serialize(message), yield);
+        connection.close(yield);
+    });
+
+    EXPECT_CALL(onConnectHook_, Call());
+    EXPECT_CALL(onDisconnectHook_, Call()).WillOnce([this]() { subscriptionSource_.stop(); });
+    EXPECT_CALL(*subscriptionManager_, forwardProposedTransaction(message)).Times(0);
+    ioContext_.run();
+}
+
 TEST_F(SubscriptionSourceReadTests, GotValidationReceivedIsForwardingFalse)
 {
     boost::asio::spawn(ioContext_, [this](boost::asio::yield_context yield) {

tests/unit/feed/SubscriptionManagerTests.cpp

@@ -442,8 +442,79 @@ TEST_F(SubscriptionManagerTest, ProposedTransactionTest)
                 "Destination":"rLEsXccBGNR3UPuPu2hUXPjziKC3qKSBun"
             }
         })";
+    constexpr static auto OrderbookPublish =
+        R"({
+            "transaction":
+            {
+                "Account":"rf1BiGeXwwQoi8Z2ueFYTEXSwuJYfV2Jpn",
+                "Amount":"1",
+                "DeliverMax":"1",
+                "Destination":"rLEsXccBGNR3UPuPu2hUXPjziKC3qKSBun",
+                "Fee":"1",
+                "Sequence":32,
+                "SigningPubKey":"74657374",
+                "TransactionType":"Payment",
+                "hash":"51D2AAA6B8E4E16EF22F6424854283D8391B56875858A711B8CE4D5B9A422CC2",
+                "date":0
+            },
+            "meta":
+            {
+                "AffectedNodes":
+                [
+                    {
+                        "ModifiedNode":
+                        {
+                            "FinalFields":
+                            {
+                                "TakerGets":"3",
+                                "TakerPays":
+                                {
+                                    "currency":"0158415500000000C1F76FF6ECB0BAC600000000",
+                                    "issuer":"rf1BiGeXwwQoi8Z2ueFYTEXSwuJYfV2Jpn",
+                                    "value":"1"
+                                }
+                            },
+                            "LedgerEntryType":"Offer",
+                            "PreviousFields":
+                            {
+                                "TakerGets":"1",
+                                "TakerPays":
+                                {
+                                    "currency":"0158415500000000C1F76FF6ECB0BAC600000000",
+                                    "issuer":"rf1BiGeXwwQoi8Z2ueFYTEXSwuJYfV2Jpn",
+                                    "value":"3"
+                                }
+                            }
+                        }
+                    }
+                ],
+                "TransactionIndex":22,
+                "TransactionResult":"tesSUCCESS",
+                "delivered_amount":"unavailable"
+            },
+            "type":"transaction",
+            "validated":true,
+            "status":"closed",
+            "ledger_index":33,
+            "ledger_hash":"4BC50C9B0D8515D3EAAE1E74B29A95804346C491EE1A95BF25E4AAB854A6A652",
+            "engine_result_code":0,
+            "engine_result":"tesSUCCESS",
+            "close_time_iso": "2000-01-01T00:00:00Z",
+            "engine_result_message":"The transaction was applied. Only final in a validated ledger."
+        })";
     EXPECT_CALL(*sessionPtr, send(SharedStringJsonEq(dummyTransaction))).Times(2);
+    EXPECT_CALL(*sessionPtr, send(SharedStringJsonEq(OrderbookPublish))).Times(2);
     SubscriptionManagerPtr->forwardProposedTransaction(json::parse(dummyTransaction).get_object());
+
+    auto const ledgerinfo = CreateLedgerInfo(LEDGERHASH, 33);
+    auto trans1 = TransactionAndMetadata();
+    auto obj = CreatePaymentTransactionObject(ACCOUNT1, ACCOUNT2, 1, 1, 32);
+    trans1.transaction = obj.getSerializer().peekData();
+    trans1.ledgerSequence = 32;
+
+    auto const metaObj = CreateMetaDataForBookChange(CURRENCY, ACCOUNT1, 22, 3, 1, 1, 3);
+    trans1.metadata = metaObj.getSerializer().peekData();
+    SubscriptionManagerPtr->pubTransaction(trans1, ledgerinfo);
     ctx.run();
 
     // unsub account1
@@ -452,3 +523,57 @@ TEST_F(SubscriptionManagerTest, ProposedTransactionTest)
     SubscriptionManagerPtr->unsubProposedTransactions(session);
     EXPECT_EQ(SubscriptionManagerPtr->report()["transactions_proposed"], 0);
 }
+
+TEST_F(SubscriptionManagerTest, DuplicateResponseSubTxAndProposedTx)
+{
+    SubscriptionManagerPtr->subProposedTransactions(session);
+    SubscriptionManagerPtr->subTransactions(session);
+    EXPECT_EQ(SubscriptionManagerPtr->report()["transactions"], 1);
+    EXPECT_EQ(SubscriptionManagerPtr->report()["transactions_proposed"], 1);
+
+    EXPECT_CALL(*sessionPtr, send(testing::_)).Times(2);
+
+    auto const ledgerinfo = CreateLedgerInfo(LEDGERHASH, 33);
+    auto trans1 = TransactionAndMetadata();
+    auto obj = CreatePaymentTransactionObject(ACCOUNT1, ACCOUNT2, 1, 1, 32);
+    trans1.transaction = obj.getSerializer().peekData();
+    trans1.ledgerSequence = 32;
+
+    auto const metaObj = CreateMetaDataForBookChange(CURRENCY, ACCOUNT1, 22, 3, 1, 1, 3);
+    trans1.metadata = metaObj.getSerializer().peekData();
+    SubscriptionManagerPtr->pubTransaction(trans1, ledgerinfo);
+    ctx.run();
+
+    SubscriptionManagerPtr->unsubTransactions(session);
+    EXPECT_EQ(SubscriptionManagerPtr->report()["transactions"], 0);
+    SubscriptionManagerPtr->unsubProposedTransactions(session);
+    EXPECT_EQ(SubscriptionManagerPtr->report()["transactions_proposed"], 0);
+}
+
+TEST_F(SubscriptionManagerTest, NoDuplicateResponseSubAccountAndProposedAccount)
+{
+    auto const account = GetAccountIDWithString(ACCOUNT1);
+    SubscriptionManagerPtr->subProposedAccount(account, session);
+    SubscriptionManagerPtr->subAccount(account, session);
+    EXPECT_EQ(SubscriptionManagerPtr->report()["accounts_proposed"], 1);
+    EXPECT_EQ(SubscriptionManagerPtr->report()["account"], 1);
+
+    EXPECT_CALL(*sessionPtr, send(testing::_)).Times(1);
+
+    auto const ledgerinfo = CreateLedgerInfo(LEDGERHASH, 33);
+    auto trans1 = TransactionAndMetadata();
+    auto obj = CreatePaymentTransactionObject(ACCOUNT1, ACCOUNT2, 1, 1, 32);
+    trans1.transaction = obj.getSerializer().peekData();
+    trans1.ledgerSequence = 32;
+
+    auto const metaObj = CreateMetaDataForBookChange(CURRENCY, ACCOUNT1, 22, 3, 1, 1, 3);
+    trans1.metadata = metaObj.getSerializer().peekData();
+    SubscriptionManagerPtr->pubTransaction(trans1, ledgerinfo);
+    ctx.run();
+
+    // unsub account1
+    SubscriptionManagerPtr->unsubProposedAccount(account, session);
+    EXPECT_EQ(SubscriptionManagerPtr->report()["accounts_proposed"], 0);
+    SubscriptionManagerPtr->unsubAccount(account, session);
+    EXPECT_EQ(SubscriptionManagerPtr->report()["account"], 0);
+}

tests/unit/feed/TransactionFeedTests.cpp

@@ -187,6 +187,28 @@ TEST_F(FeedTransactionTest, SubTransactionV1)
     ctx.run();
 }
 
+TEST_F(FeedTransactionTest, SubTransactionForProposedTx)
+{
+    testFeedPtr->subProposed(sessionPtr);
+    EXPECT_EQ(testFeedPtr->transactionSubCount(), 0);
+
+    auto const ledgerinfo = CreateLedgerInfo(LEDGERHASH, 33);
+    auto trans1 = TransactionAndMetadata();
+    ripple::STObject const obj = CreatePaymentTransactionObject(ACCOUNT1, ACCOUNT2, 1, 1, 32);
+    trans1.transaction = obj.getSerializer().peekData();
+    trans1.ledgerSequence = 32;
+    trans1.metadata = CreatePaymentTransactionMetaObject(ACCOUNT1, ACCOUNT2, 110, 30, 22).getSerializer().peekData();
+    testFeedPtr->pub(trans1, ledgerinfo, backend);
+
+    EXPECT_CALL(*mockSessionPtr, send(SharedStringJsonEq(TRAN_V1))).Times(1);
+    ctx.run();
+
+    testFeedPtr->unsubProposed(sessionPtr);
+    testFeedPtr->pub(trans1, ledgerinfo, backend);
+    ctx.restart();
+    ctx.run();
+}
+
 TEST_F(FeedTransactionTest, SubTransactionV2)
 {
     sessionPtr->apiSubVersion = 2;
@@ -237,6 +259,29 @@ TEST_F(FeedTransactionTest, SubAccountV1)
     ctx.run();
 }
 
+TEST_F(FeedTransactionTest, SubForProposedAccount)
+{
+    auto const account = GetAccountIDWithString(ACCOUNT1);
+    testFeedPtr->subProposed(account, sessionPtr);
+    EXPECT_EQ(testFeedPtr->accountSubCount(), 0);
+
+    auto const ledgerinfo = CreateLedgerInfo(LEDGERHASH, 33);
+
+    auto trans1 = TransactionAndMetadata();
+    ripple::STObject const obj = CreatePaymentTransactionObject(ACCOUNT1, ACCOUNT2, 1, 1, 32);
+    trans1.transaction = obj.getSerializer().peekData();
+    trans1.ledgerSequence = 32;
+    trans1.metadata = CreatePaymentTransactionMetaObject(ACCOUNT1, ACCOUNT2, 110, 30, 22).getSerializer().peekData();
+    testFeedPtr->pub(trans1, ledgerinfo, backend);
+    EXPECT_CALL(*mockSessionPtr, send(SharedStringJsonEq(TRAN_V1))).Times(1);
+    ctx.run();
+
+    testFeedPtr->unsubProposed(account, sessionPtr);
+    testFeedPtr->pub(trans1, ledgerinfo, backend);
+    ctx.restart();
+    ctx.run();
+}
+
 TEST_F(FeedTransactionTest, SubAccountV2)
 {
     auto const account = GetAccountIDWithString(ACCOUNT1);
@@ -930,6 +975,98 @@ TEST_F(FeedTransactionTest, SubTransactionOfferCreationGlobalFrozen)
     ctx.run();
 }
 
+TEST_F(FeedTransactionTest, SubBothProposedAndValidatedAccount)
+{
+    auto const account = GetAccountIDWithString(ACCOUNT1);
+    testFeedPtr->sub(account, sessionPtr);
+    testFeedPtr->subProposed(account, sessionPtr);
+    EXPECT_EQ(testFeedPtr->accountSubCount(), 1);
+
+    auto const ledgerinfo = CreateLedgerInfo(LEDGERHASH, 33);
+    auto trans1 = TransactionAndMetadata();
+    ripple::STObject const obj = CreatePaymentTransactionObject(ACCOUNT1, ACCOUNT2, 1, 1, 32);
+    trans1.transaction = obj.getSerializer().peekData();
+    trans1.ledgerSequence = 32;
+    trans1.metadata = CreatePaymentTransactionMetaObject(ACCOUNT1, ACCOUNT2, 110, 30, 22).getSerializer().peekData();
+    testFeedPtr->pub(trans1, ledgerinfo, backend);
+    EXPECT_CALL(*mockSessionPtr, send(SharedStringJsonEq(TRAN_V1))).Times(1);
+    ctx.run();
+
+    testFeedPtr->unsub(account, sessionPtr);
+    testFeedPtr->unsubProposed(account, sessionPtr);
+    EXPECT_EQ(testFeedPtr->accountSubCount(), 0);
+
+    testFeedPtr->pub(trans1, ledgerinfo, backend);
+    ctx.restart();
+    ctx.run();
+}
+
+TEST_F(FeedTransactionTest, SubBothProposedAndValidated)
+{
+    testFeedPtr->sub(sessionPtr);
+    testFeedPtr->subProposed(sessionPtr);
+    EXPECT_EQ(testFeedPtr->transactionSubCount(), 1);
+
+    auto const ledgerinfo = CreateLedgerInfo(LEDGERHASH, 33);
+    auto trans1 = TransactionAndMetadata();
+    ripple::STObject const obj = CreatePaymentTransactionObject(ACCOUNT1, ACCOUNT2, 1, 1, 32);
+    trans1.transaction = obj.getSerializer().peekData();
+    trans1.ledgerSequence = 32;
+    trans1.metadata = CreatePaymentTransactionMetaObject(ACCOUNT1, ACCOUNT2, 110, 30, 22).getSerializer().peekData();
+    testFeedPtr->pub(trans1, ledgerinfo, backend);
+    EXPECT_CALL(*mockSessionPtr, send(SharedStringJsonEq(TRAN_V1))).Times(2);
+    ctx.run();
+
+    testFeedPtr->unsub(sessionPtr);
+    testFeedPtr->unsubProposed(sessionPtr);
+    testFeedPtr->pub(trans1, ledgerinfo, backend);
+    ctx.restart();
+    ctx.run();
+}
+
+TEST_F(FeedTransactionTest, SubProposedDisconnect)
+{
+    testFeedPtr->subProposed(sessionPtr);
+    EXPECT_EQ(testFeedPtr->transactionSubCount(), 0);
+
+    auto const ledgerinfo = CreateLedgerInfo(LEDGERHASH, 33);
+    auto trans1 = TransactionAndMetadata();
+    ripple::STObject const obj = CreatePaymentTransactionObject(ACCOUNT1, ACCOUNT2, 1, 1, 32);
+    trans1.transaction = obj.getSerializer().peekData();
+    trans1.ledgerSequence = 32;
+    trans1.metadata = CreatePaymentTransactionMetaObject(ACCOUNT1, ACCOUNT2, 110, 30, 22).getSerializer().peekData();
+    testFeedPtr->pub(trans1, ledgerinfo, backend);
+    EXPECT_CALL(*mockSessionPtr, send(SharedStringJsonEq(TRAN_V1))).Times(1);
+    ctx.run();
+
+    sessionPtr.reset();
+    testFeedPtr->pub(trans1, ledgerinfo, backend);
+    ctx.restart();
+    ctx.run();
+}
+
+TEST_F(FeedTransactionTest, SubProposedAccountDisconnect)
+{
+    auto const account = GetAccountIDWithString(ACCOUNT1);
+    testFeedPtr->subProposed(account, sessionPtr);
+    EXPECT_EQ(testFeedPtr->accountSubCount(), 0);
+
+    auto const ledgerinfo = CreateLedgerInfo(LEDGERHASH, 33);
+    auto trans1 = TransactionAndMetadata();
+    ripple::STObject const obj = CreatePaymentTransactionObject(ACCOUNT1, ACCOUNT2, 1, 1, 32);
+    trans1.transaction = obj.getSerializer().peekData();
+    trans1.ledgerSequence = 32;
+    trans1.metadata = CreatePaymentTransactionMetaObject(ACCOUNT1, ACCOUNT2, 110, 30, 22).getSerializer().peekData();
+    testFeedPtr->pub(trans1, ledgerinfo, backend);
+    EXPECT_CALL(*mockSessionPtr, send(SharedStringJsonEq(TRAN_V1))).Times(1);
+    ctx.run();
+
+    sessionPtr.reset();
+    testFeedPtr->pub(trans1, ledgerinfo, backend);
+    ctx.restart();
+    ctx.run();
+}
+
 struct TransactionFeedMockPrometheusTest : WithMockPrometheus, SyncAsioContextTest {
 protected:
     std::shared_ptr<web::ConnectionBase> sessionPtr;