Elements-qt: Correctly display the amount in the sender's wallet afte…

…r using Send button

src/interfaces/wallet.h

@@ -36,6 +36,7 @@ struct PartiallySignedTransaction;
 struct WalletContext;
 struct bilingual_str;
 typedef uint8_t isminefilter;
+struct BlindDetails;
 
 namespace interfaces {
 
@@ -140,13 +141,14 @@ class Wallet
         bool sign,
         int& change_pos,
         CAmount& fee,
-        std::vector<CAmount>& out_amounts,
+        BlindDetails* blind_details,
         bilingual_str& fail_reason) = 0;
 
     //! Commit transaction.
     virtual void commitTransaction(CTransactionRef tx,
         WalletValueMap value_map,
-        WalletOrderForm order_form) = 0;
+        WalletOrderForm order_form,
+        BlindDetails* blind_details) = 0;
 
     //! Return whether transaction can be abandoned.
     virtual bool transactionCanBeAbandoned(const uint256& txid) = 0;

src/qt/sendcoinsdialog.cpp

@@ -281,11 +281,13 @@ bool SendCoinsDialog::PrepareSendText(QString& question_string, QString& informa
 
     // prepare transaction for getting txFee earlier
     m_current_transaction = std::make_unique<WalletModelTransaction>(recipients);
+    if (g_con_elementsmode)
+        m_current_blind_details = std::make_unique<BlindDetails>();
     WalletModel::SendCoinsReturn prepareStatus;
 
     updateCoinControlState();
 
-    prepareStatus = model->prepareTransaction(*m_current_transaction, *m_coin_control);
+    prepareStatus = model->prepareTransaction(*m_current_transaction, m_current_blind_details.get(), *m_coin_control);
 
     // process prepareStatus and on error generate message shown to user
     processSendCoinsReturn(prepareStatus,
@@ -403,6 +405,7 @@ void SendCoinsDialog::sendButtonClicked([[maybe_unused]] bool checked)
     QString question_string, informative_text, detailed_text;
     if (!PrepareSendText(question_string, informative_text, detailed_text)) return;
     assert(m_current_transaction);
+    assert(!g_con_elementsmode || m_current_blind_details);
 
     const QString confirmation = model->wallet().privateKeysDisabled() && !model->wallet().hasExternalSigner() ? tr("Confirm transaction proposal") : tr("Confirm send coins");
     const QString confirmButtonText = model->wallet().privateKeysDisabled() && !model->wallet().hasExternalSigner() ? tr("Create Unsigned") : tr("Sign and send");
@@ -461,7 +464,7 @@ void SendCoinsDialog::sendButtonClicked([[maybe_unused]] bool checked)
         if (complete) {
             const CTransactionRef tx = MakeTransactionRef(mtx);
             m_current_transaction->setWtx(tx);
-            WalletModel::SendCoinsReturn sendStatus = model->sendCoins(*m_current_transaction);
+            WalletModel::SendCoinsReturn sendStatus = model->sendCoins(*m_current_transaction, m_current_blind_details.get());
             // process sendStatus and on error generate message shown to user
             processSendCoinsReturn(sendStatus);
 
@@ -520,7 +523,7 @@ void SendCoinsDialog::sendButtonClicked([[maybe_unused]] bool checked)
         } // msgBox.exec()
     } else {
         // now send the prepared transaction
-        WalletModel::SendCoinsReturn sendStatus = model->sendCoins(*m_current_transaction);
+        WalletModel::SendCoinsReturn sendStatus = model->sendCoins(*m_current_transaction, m_current_blind_details.get());
         // process sendStatus and on error generate message shown to user
         processSendCoinsReturn(sendStatus);
 
@@ -537,11 +540,13 @@ void SendCoinsDialog::sendButtonClicked([[maybe_unused]] bool checked)
     }
     fNewRecipientAllowed = true;
     m_current_transaction.reset();
+    m_current_blind_details.reset();
 }
 
 void SendCoinsDialog::clear()
 {
     m_current_transaction.reset();
+    m_current_blind_details.reset();
 
     // Clear coin control settings
     m_coin_control->UnSelectAll();

src/qt/sendcoinsdialog.h

@@ -64,6 +64,7 @@ public Q_SLOTS:
     WalletModel *model;
     std::unique_ptr<CCoinControl> m_coin_control;
     std::unique_ptr<WalletModelTransaction> m_current_transaction;
+    std::unique_ptr<BlindDetails> m_current_blind_details;
     bool fNewRecipientAllowed;
     bool fFeeMinimized;
     const PlatformStyle *platformStyle;

src/qt/walletmodel.cpp

@@ -176,7 +176,7 @@ bool WalletModel::validateAddress(const QString &address)
     return IsValidDestinationString(address.toStdString());
 }
 
-WalletModel::SendCoinsReturn WalletModel::prepareTransaction(WalletModelTransaction &transaction, const CCoinControl& coinControl)
+WalletModel::SendCoinsReturn WalletModel::prepareTransaction(WalletModelTransaction &transaction, BlindDetails *blind_details, const CCoinControl& coinControl)
 {
     CAmountMap total;
     bool fSubtractFeeFromAmount = false;
@@ -236,10 +236,13 @@ WalletModel::SendCoinsReturn WalletModel::prepareTransaction(WalletModelTransact
 
         auto& newTx = transaction.getWtx();
         std::vector<CAmount> out_amounts;
-        newTx = m_wallet->createTransaction(vecSend, coinControl, !wallet().privateKeysDisabled() /* sign */, nChangePosRet, nFeeRequired, out_amounts, error);
+        newTx = m_wallet->createTransaction(vecSend, coinControl, !wallet().privateKeysDisabled() /* sign */, nChangePosRet, nFeeRequired, blind_details, error);
         transaction.setTransactionFee(nFeeRequired);
         if (fSubtractFeeFromAmount && newTx) {
-            assert(out_amounts.size() == newTx->vout.size());
+            if(blind_details) {
+                out_amounts = blind_details->o_amounts;
+                assert(out_amounts.size() == newTx->vout.size());
+            }
             transaction.reassignAmounts(out_amounts, nChangePosRet);
         }
 
@@ -266,7 +269,7 @@ WalletModel::SendCoinsReturn WalletModel::prepareTransaction(WalletModelTransact
     return SendCoinsReturn(OK);
 }
 
-WalletModel::SendCoinsReturn WalletModel::sendCoins(WalletModelTransaction &transaction)
+WalletModel::SendCoinsReturn WalletModel::sendCoins(WalletModelTransaction &transaction, BlindDetails *blind_details)
 {
     QByteArray transaction_array; /* store serialized transaction */
 
@@ -279,7 +282,7 @@ WalletModel::SendCoinsReturn WalletModel::sendCoins(WalletModelTransaction &tran
         }
 
         auto& newTx = transaction.getWtx();
-        wallet().commitTransaction(newTx, {} /* mapValue */, std::move(vOrderForm));
+        wallet().commitTransaction(newTx, {} /* mapValue */, std::move(vOrderForm), blind_details);
 
         CDataStream ssTx(SER_NETWORK, PROTOCOL_VERSION);
         ssTx << *newTx;

src/qt/walletmodel.h

@@ -100,10 +100,10 @@ class WalletModel : public QObject
     };
 
     // prepare transaction for getting txfee before sending coins
-    SendCoinsReturn prepareTransaction(WalletModelTransaction &transaction, const CCoinControl& coinControl);
+    SendCoinsReturn prepareTransaction(WalletModelTransaction &transaction, BlindDetails *blind_details, const CCoinControl& coinControl);
 
     // Send coins to a list of recipients
-    SendCoinsReturn sendCoins(WalletModelTransaction &transaction);
+    SendCoinsReturn sendCoins(WalletModelTransaction &transaction, BlindDetails *blind_details);
 
     // Wallet encryption
     bool setWalletEncrypted(const SecureString& passphrase);

src/wallet/interfaces.cpp

@@ -248,26 +248,25 @@ class WalletImpl : public Wallet
         bool sign,
         int& change_pos,
         CAmount& fee,
-        std::vector<CAmount>& out_amounts,
+        BlindDetails* blind_details,
         bilingual_str& fail_reason) override
     {
         LOCK(m_wallet->cs_wallet);
         CTransactionRef tx;
         FeeCalculation fee_calc_out;
-        BlindDetails blind_details;
         if (!m_wallet->CreateTransaction(recipients, tx, fee, change_pos,
-                fail_reason, coin_control, fee_calc_out, sign, gArgs.GetBoolArg("-blindedaddresses", g_con_elementsmode) ? &blind_details : nullptr)) {
+                fail_reason, coin_control, fee_calc_out, sign, blind_details)) {
             return {};
         }
-        out_amounts = blind_details.o_amounts;
         return tx;
     }
     void commitTransaction(CTransactionRef tx,
         WalletValueMap value_map,
-        WalletOrderForm order_form) override
+        WalletOrderForm order_form,
+        BlindDetails* blind_details) override
     {
         LOCK(m_wallet->cs_wallet);
-        m_wallet->CommitTransaction(std::move(tx), std::move(value_map), std::move(order_form));
+        m_wallet->CommitTransaction(std::move(tx), std::move(value_map), std::move(order_form), blind_details);
     }
     bool transactionCanBeAbandoned(const uint256& txid) override { return m_wallet->TransactionCanBeAbandoned(txid); }
     bool abandonTransaction(const uint256& txid) override