Fixes and start on new JS API.

alethzero/Main.ui

@@ -69,6 +69,21 @@
           <string>Tab 1</string>
          </attribute>
          <layout class="QVBoxLayout" name="verticalLayout_3">
+          <property name="spacing">
+           <number>0</number>
+          </property>
+          <property name="leftMargin">
+           <number>4</number>
+          </property>
+          <property name="topMargin">
+           <number>4</number>
+          </property>
+          <property name="rightMargin">
+           <number>4</number>
+          </property>
+          <property name="bottomMargin">
+           <number>4</number>
+          </property>
           <item>
            <widget class="QLineEdit" name="urlEdit"/>
           </item>
@@ -81,6 +96,9 @@
             </property>
            </widget>
           </item>
+          <item>
+           <widget class="QLineEdit" name="jsInput"/>
+          </item>
          </layout>
         </widget>
        </widget>

alethzero/MainWin.cpp

@@ -186,7 +186,7 @@ Main::Main(QWidget *parent) :
 	else if (pocnumber == 4)
 		m_servers.push_back("54.72.31.55:30303");
 	else if (pocnumber == 5)
-		m_servers.push_back("54.201.28.117:30303");
+		m_servers.push_back("54.72.31.55:30305");
 	else
 	{
 		connect(&m_webCtrl, &QNetworkAccessManager::finished, [&](QNetworkReply* _r)
@@ -226,10 +226,8 @@ Main::Main(QWidget *parent) :
 
 	QWebFrame* f = ui->webView->page()->currentFrame();
 	connect(f, &QWebFrame::javaScriptWindowObjectCleared, [=](){
-		f->addToJavaScriptWindowObject("eth", new QEthereum(this, m_client.get(), owned()), QWebFrame::ScriptOwnership);
-		f->addToJavaScriptWindowObject("u256", new U256Helper, QWebFrame::ScriptOwnership);
-		f->addToJavaScriptWindowObject("key", new KeyHelper, QWebFrame::ScriptOwnership);
-		f->addToJavaScriptWindowObject("bytes", new  BytesHelper, QWebFrame::ScriptOwnership);
+		auto qe = new QEthereum(this, m_client.get(), owned());
+		qe->setup(f);
 	});
 
 	readSettings();
@@ -251,6 +249,12 @@ Main::~Main()
 	writeSettings();
 }
 
+void Main::on_jsInput_returnPressed()
+{
+	ui->jsInput->setText(ui->webView->page()->currentFrame()->evaluateJavaScript(ui->jsInput->text()).toString());
+	ui->jsInput->setSelection(0, ui->jsInput->text().size());
+}
+
 QString Main::pretty(eth::Address _a) const
 {
 	h256 n;
@@ -368,10 +372,10 @@ void Main::readSettings()
 	ui->port->setValue(s.value("port", ui->port->value()).toInt());
 	ui->nameReg->setText(s.value("NameReg", "").toString());
 	ui->urlEdit->setText(s.value("url", "http://gavwood.com/gavcoin.html").toString());
-	on_urlEdit_editingFinished();
+	on_urlEdit_returnPressed();
 }
 
-void Main::on_urlEdit_editingFinished()
+void Main::on_urlEdit_returnPressed()
 {
 	ui->webView->setUrl(ui->urlEdit->text());
 }

alethzero/MainWin.h

@@ -69,10 +69,11 @@ private slots:
 	void on_nameReg_textChanged();
 	void on_preview_triggered() { refresh(true); }
 	void on_quit_triggered() { close(); }
-	void on_urlEdit_editingFinished();
+	void on_urlEdit_returnPressed();
 	void on_debugStep_triggered();
 	void on_debug_clicked();
 	void on_debugTimeline_valueChanged();
+	void on_jsInput_returnPressed();
 
 	void refresh(bool _override = false);
 	void refreshNetwork();

libethcore/Common.h

@@ -24,7 +24,7 @@
 #pragma once
 
 // define version
-#define ETH_VERSION 0.5.1
+#define ETH_VERSION 0.5.2
 
 // way to many uint to size_t warnings in 32 bit build
 #ifdef _M_IX86

libethereum/BlockInfo.cpp

@@ -142,7 +142,7 @@ void BlockInfo::verifyInternals(bytesConstRef _block) const
 {
 	RLP root(_block);
 
-	u256 mgp = 0;
+	u256 mgp = (u256)-1;
 
 	Overlay db;
 	GenericTrieDB<Overlay> t(&db);
@@ -153,15 +153,14 @@ void BlockInfo::verifyInternals(bytesConstRef _block) const
 		bytes k = rlp(i);
 		t.insert(&k, tr.data());
 		u256 gp = tr[0][1].toInt<u256>();
-		if (!i || mgp > gp)
-			mgp = gp;
+		mgp = min(mgp, gp);
 		++i;
 	}
 	if (transactionsRoot != t.root())
 		throw InvalidTransactionsHash(t.root(), transactionsRoot);
 
 	if (minGasPrice > mgp)
-		throw InvalidMinGasPrice();
+		throw InvalidMinGasPrice(minGasPrice, mgp);
 
 	if (sha3Uncles != sha3(root[2].data()))
 		throw InvalidUnclesHash();

libethereum/Exceptions.h

@@ -35,7 +35,7 @@ class InvalidTransactionsHash: public Exception { public: InvalidTransactionsHas
 class InvalidTransaction: public Exception {};
 class InvalidDifficulty: public Exception {};
 class InvalidGasLimit: public Exception {};
-class InvalidMinGasPrice: public Exception {};
+class InvalidMinGasPrice: public Exception { public: InvalidMinGasPrice(u256 _provided = 0, u256 _limit = 0): provided(_provided), limit(_limit) {} u256 provided; u256 limit; virtual std::string description() const { return "Invalid minimum gas price (provided: " + toString(provided) + " limit:" + toString(limit) + ")"; } };
 class InvalidTransactionGasUsed: public Exception {};
 class InvalidTransactionStateRoot: public Exception {};
 class InvalidTimestamp: public Exception {};

libethereum/Transaction.cpp

@@ -123,6 +123,8 @@ void Transaction::fillStream(RLPStream& _s, bool _sig) const
 h256 Transaction::kFromMessage(h256 _msg, h256 _priv)
 {
 	// TODO!
+//	bytes v(32, 1);
+//	bytes k(32, 0);
 	/*
 	v = '\x01' * 32
 	k = '\x00' * 32

libqethereum/QEthereum.cpp

@@ -1,5 +1,6 @@
 #include <QtQml/QtQml>
 #include <QtCore/QtCore>
+#include <QtWebKitWidgets/QWebFrame>
 #include <libethcore/FileSystem.h>
 #include <libethereum/Dagger.h>
 #include <libethereum/Client.h>
@@ -192,6 +193,22 @@ QEthereum::~QEthereum()
 {
 }
 
+void QEthereum::setup(QWebFrame* _e)
+{
+	// disconnect
+	disconnect(SIGNAL(changed()));
+	_e->addToJavaScriptWindowObject("eth", this, QWebFrame::ScriptOwnership);
+	_e->addToJavaScriptWindowObject("u256", new U256Helper, QWebFrame::ScriptOwnership);
+	_e->addToJavaScriptWindowObject("key", new KeyHelper, QWebFrame::ScriptOwnership);
+	_e->addToJavaScriptWindowObject("bytes", new  BytesHelper, QWebFrame::ScriptOwnership);
+//	_e->evaluateJavaScript("xeth = new Object({\"callback\": function(f) { eth.testcallback.connect(f) }})");
+	_e->evaluateJavaScript("eth.onChanged = function(f) { eth.changed.connect(f) }");
+}
+
+void QEthereum::teardown(QWebFrame* _e)
+{
+}
+
 Client* QEthereum::client() const
 {
 	return m_client;

libqethereum/QEthereum.h

@@ -1,6 +1,7 @@
 #pragma once
 
 #include <QtCore/QAbstractListModel>
+#include <QtQml>
 #include <libethereum/CommonEth.h>
 #include <libethcore/CommonIO.h>
 
@@ -11,6 +12,7 @@ class State;
 
 class QQmlEngine;
 class QJSEngine;
+class QWebFrame;
 
 class QEthereum;
 class QmlAccount;
@@ -291,6 +293,9 @@ public:
 
 	eth::Client* client() const;
 
+	void setup(QWebFrame* _e);
+	void teardown(QWebFrame* _e);
+
 	Q_INVOKABLE QVariant/*eth::Address*/ coinbase() const;
 
 	Q_INVOKABLE bool isListening() const;
@@ -304,6 +309,7 @@ public:
 	Q_INVOKABLE QVariant gasPrice() const { return toQJS(10 * eth::szabo); }
 
 	Q_INVOKABLE QString ethTest() const { return "Hello world!"; }
+	Q_INVOKABLE void ethTest2() { changed(); }
 
 	Q_INVOKABLE QVariant/*eth::KeyPair*/ key() const;
 	Q_INVOKABLE QList<QVariant/*eth::KeyPair*/> keys() const;
@@ -329,6 +335,7 @@ public slots:
 
 signals:
 	void changed();
+	void testcallback();
 //	void netChanged();
 //	void miningChanged();