From 5e56ef5152cd98133c3b8575321dfe7dd253bd7d Mon Sep 17 00:00:00 2001
From: Pavel Vasin <pavel@vasin.nl>
Date: Tue, 28 Jul 2015 09:05:14 +0300
Subject: qt: use CHashWriter also in SignVerifyMessageDialog

This eliminates unnecessary copying of data being hashed.
---
 src/qt/signverifymessagedialog.cpp | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

(limited to 'src/qt/signverifymessagedialog.cpp')

diff --git a/src/qt/signverifymessagedialog.cpp b/src/qt/signverifymessagedialog.cpp
index ce166f3672..d3984923a8 100644
--- a/src/qt/signverifymessagedialog.cpp
+++ b/src/qt/signverifymessagedialog.cpp
@@ -148,12 +148,12 @@ void SignVerifyMessageDialog::on_signMessageButton_SM_clicked()
         return;
     }
 
-    CDataStream ss(SER_GETHASH, 0);
+    CHashWriter ss(SER_GETHASH, 0);
     ss << strMessageMagic;
     ss << ui->messageIn_SM->document()->toPlainText().toStdString();
 
     std::vector<unsigned char> vchSig;
-    if (!key.SignCompact(Hash(ss.begin(), ss.end()), vchSig))
+    if (!key.SignCompact(ss.GetHash(), vchSig))
     {
         ui->statusLabel_SM->setStyleSheet("QLabel { color: red; }");
         ui->statusLabel_SM->setText(QString("<nobr>") + tr("Message signing failed.") + QString("</nobr>"));
@@ -223,12 +223,12 @@ void SignVerifyMessageDialog::on_verifyMessageButton_VM_clicked()
         return;
     }
 
-    CDataStream ss(SER_GETHASH, 0);
+    CHashWriter ss(SER_GETHASH, 0);
     ss << strMessageMagic;
     ss << ui->messageIn_VM->document()->toPlainText().toStdString();
 
     CPubKey pubkey;
-    if (!pubkey.RecoverCompact(Hash(ss.begin(), ss.end()), vchSig))
+    if (!pubkey.RecoverCompact(ss.GetHash(), vchSig))
     {
         ui->signatureIn_VM->setValid(false);
         ui->statusLabel_VM->setStyleSheet("QLabel { color: red; }");
-- 
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