Remember last ping time.

libp2p/Host.cpp

@@ -673,6 +673,7 @@ void Host::pingAll()
 	for (auto& i: m_peers)
 		if (auto j = i.second.lock())
 			j->ping();
+	m_lastPing = chrono::steady_clock::now();
 }
 
 bytes Host::saveNodes() const

libqethereum/QEthereum.cpp

@@ -396,7 +396,7 @@ static QString toJson(dev::eth::Transaction const& _bi)
 	v["from"] = toQJS(_bi.sender());
 	v["gas"] = (int)_bi.gas;
 	v["gasPrice"] = toQJS(_bi.gasPrice);
-	v["nonce"] = toQJS(_bi.nonce);
+	v["nonce"] = (int)_bi.nonce;
 	v["value"] = toQJS(_bi.value);
 
 	return QString::fromUtf8(QJsonDocument(v).toJson());