Payment Protocol: X509-validated payment requests

Add support for a Payment Protocol to Bitcoin-Qt.

Payment messages are protocol-buffer encoded and communicated over
http(s), so this adds a dependency on the Google protocol buffer
library, and requires Qt with OpenSSL support.

1 files changed, 36 insertions, 11 deletions

diff --git a/src/qt/sendcoinsdialog.cpp b/src/qt/sendcoinsdialog.cpp
index 2c7bab2045..09d83b1a29 100644
--- a/src/qt/sendcoinsdialog.cpp
+++ b/src/qt/sendcoinsdialog.cpp
@@ -93,11 +93,26 @@ void SendCoinsDialog::on_sendButton_clicked()
     QStringList formatted;
     foreach(const SendCoinsRecipient &rcp, recipients)
     {
+        QString amount = BitcoinUnits::formatWithUnit(BitcoinUnits::BTC, rcp.amount);
+        if (rcp.authenticatedMerchant.isEmpty())
+        {
+            QString address = rcp.address;
 #if QT_VERSION < 0x050000
-        formatted.append(tr("<b>%1</b> to %2 (%3)").arg(BitcoinUnits::formatWithUnit(BitcoinUnits::BTC, rcp.amount), Qt::escape(rcp.label), rcp.address));
+            QString to = Qt::escape(rcp.label);
 #else
-        formatted.append(tr("<b>%1</b> to %2 (%3)").arg(BitcoinUnits::formatWithUnit(BitcoinUnits::BTC, rcp.amount), rcp.label.toHtmlEscaped(), rcp.address));
+            QString to = rcp.label.toHtmlEscaped();
 #endif
+            formatted.append(tr("<b>%1</b> to %2 (%3)").arg(amount, to, address));
+        }
+        else
+        {
+#if QT_VERSION < 0x050000
+            QString merchant = Qt::escape(rcp.authenticatedMerchant);
+#else
+            QString merchant = rcp.authenticatedMerchant.toHtmlEscaped();
+#endif
+            formatted.append(tr("<b>%1</b> to %2").arg(amount, merchant));
+        }
     }
 
     fNewRecipientAllowed = false;
@@ -292,20 +307,30 @@ void SendCoinsDialog::pasteEntry(const SendCoinsRecipient &rv)
     entry->setValue(rv);
 }
 
-bool SendCoinsDialog::handleURI(const QString &uri)
+bool SendCoinsDialog::handlePaymentRequest(const SendCoinsRecipient &rv)
 {
-    SendCoinsRecipient rv;
-    // URI has to be valid
-    if (GUIUtil::parseBitcoinURI(uri, &rv))
-    {
+    if (!rv.authenticatedMerchant.isEmpty()) {
+        // Expired payment request?
+        const payments::PaymentDetails& details = rv.paymentRequest.getDetails();
+        if (details.has_expires() && (int64)details.expires() < GetTime())
+        {
+            QMessageBox::warning(this, tr("Send Coins"),
+                                 tr("Payment request expired"));
+            return false;
+        }
+    }
+    else {
         CBitcoinAddress address(rv.address.toStdString());
-        if (!address.IsValid())
+        if (!address.IsValid()) {
+            QString strAddress(address.ToString().c_str());
+            QMessageBox::warning(this, tr("Send Coins"),
+                                 tr("Invalid payment address %1").arg(strAddress));
             return false;
-        pasteEntry(rv);
-        return true;
+        }
     }
 
-    return false;
+    pasteEntry(rv);
+    return true;
 }
 
 void SendCoinsDialog::setBalance(qint64 balance, qint64 unconfirmedBalance, qint64 immatureBalance)