transaction: async commit

Addresses #2123, reduces UI freezing on long-lasting operation, improves Trezor experience

2 files changed, 19 insertions, 0 deletions

diff --git a/src/libwalletqt/Wallet.cpp b/src/libwalletqt/Wallet.cpp
index 0c320842..17b391a6 100644
--- a/src/libwalletqt/Wallet.cpp
+++ b/src/libwalletqt/Wallet.cpp
@@ -496,6 +496,22 @@ bool Wallet::submitTxFile(const QString &fileName) const
     return m_walletImpl->importKeyImages(fileName.toStdString() + "_keyImages");
 }
 
+void Wallet::commitTransactionAsync(PendingTransaction *t)
+{
+  QStringList txid(t->txid());
+  QFuture<bool> future = QtConcurrent::run(t, &PendingTransaction::commit);
+
+  QFutureWatcher<bool> * watcher = new QFutureWatcher<bool>();
+
+  connect(watcher, &QFutureWatcher<bool>::finished,
+          this, [this, watcher, t, txid]() {
+        QFuture<bool> future = watcher->future();
+        watcher->deleteLater();
+        emit transactionCommitted(future.result(), t, txid);
+      });
+  watcher->setFuture(future);
+}
+
 void Wallet::disposeTransaction(PendingTransaction *t)
 {
     m_walletImpl->disposeTransaction(t->m_pimpl);
diff --git a/src/libwalletqt/Wallet.h b/src/libwalletqt/Wallet.h
index 2866c9fd..d8f660e5 100644
--- a/src/libwalletqt/Wallet.h
+++ b/src/libwalletqt/Wallet.h
@@ -213,6 +213,8 @@ public:
     //! Submit a transfer from file
     Q_INVOKABLE bool submitTxFile(const QString &fileName) const;
 
+    //! asynchronous transaction commit
+    Q_INVOKABLE void commitTransactionAsync(PendingTransaction * t);
 
     //! deletes transaction and frees memory
     Q_INVOKABLE void disposeTransaction(PendingTransaction * t);
@@ -324,6 +326,7 @@ signals:
     void walletCreationHeightChanged();
     void deviceButtonRequest(quint64 buttonCode);
     void deviceButtonPressed();
+    void transactionCommitted(bool status, PendingTransaction *t, QStringList txid);
 
     // emitted when transaction is created async
     void transactionCreated(PendingTransaction * transaction, QString address, QString paymentId, quint32 mixinCount);