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116 lines
4.8 KiB
116 lines
4.8 KiB
/*
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This file is part of cpp-ethereum.
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cpp-ethereum is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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cpp-ethereum is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** @file OurWebThreeStubServer.cpp
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* @author Gav Wood <i@gavwood.com>
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* @date 2014
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*/
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#include "OurWebThreeStubServer.h"
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#include <QMessageBox>
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#include <QAbstractButton>
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#include <libwebthree/WebThree.h>
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#include <libnatspec/NatspecExpressionEvaluator.h>
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#include "MainWin.h"
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using namespace std;
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using namespace dev;
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using namespace dev::eth;
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OurWebThreeStubServer::OurWebThreeStubServer(jsonrpc::AbstractServerConnector& _conn, WebThreeDirect& _web3,
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vector<KeyPair> const& _accounts, Main* main):
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WebThreeStubServer(_conn, _web3, _accounts), m_web3(&_web3), m_main(main)
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{}
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string OurWebThreeStubServer::shh_newIdentity()
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{
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KeyPair kp = dev::KeyPair::create();
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emit onNewId(QString::fromStdString(toJS(kp.sec())));
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return toJS(kp.pub());
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}
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bool OurWebThreeStubServer::showAuthenticationPopup(string const& _title, string const& _text) const
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{
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int button;
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QMetaObject::invokeMethod(m_main, "authenticate", Qt::BlockingQueuedConnection, Q_RETURN_ARG(int, button), Q_ARG(QString, QString::fromStdString(_title)), Q_ARG(QString, QString::fromStdString(_text)));
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return button == QMessageBox::Ok;
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}
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bool OurWebThreeStubServer::showCreationNotice(TransactionSkeleton const& _t) const
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{
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return showAuthenticationPopup("Contract Creation Transaction", "ÐApp is attemping to create a contract; to be endowed with " + formatBalance(_t.value) + ", with additional network fees of up to " + formatBalance(_t.gas * _t.gasPrice) + ".\n\nMaximum total cost is <b>" + formatBalance(_t.value + _t.gas * _t.gasPrice) + "</b>.");
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}
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bool OurWebThreeStubServer::showSendNotice(TransactionSkeleton const& _t) const
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{
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return showAuthenticationPopup("Fund Transfer Transaction", "ÐApp is attempting to send " + formatBalance(_t.value) + " to a recipient " + m_main->pretty(_t.to).toStdString() + ", with additional network fees of up to " + formatBalance(_t.gas * _t.gasPrice) + ".\n\nMaximum total cost is <b>" + formatBalance(_t.value + _t.gas * _t.gasPrice) + "</b>.");
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}
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bool OurWebThreeStubServer::showUnknownCallNotice(TransactionSkeleton const& _t) const
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{
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return showAuthenticationPopup("DANGEROUS! Unknown Contract Transaction!",
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"ÐApp is attempting to call into an unknown contract at address " +
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m_main->pretty(_t.to).toStdString() +
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".\n\nCall involves sending " +
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formatBalance(_t.value) + " to the recipient, with additional network fees of up to " +
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formatBalance(_t.gas * _t.gasPrice) +
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"However, this also does other stuff which we don't understand, and does so in your name.\n\n" +
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"WARNING: This is probably going to cost you at least " +
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formatBalance(_t.value + _t.gas * _t.gasPrice) +
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", however this doesn't include any side-effects, which could be of far greater importance.\n\n" +
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"REJECT UNLESS YOU REALLY KNOW WHAT YOU ARE DOING!");
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}
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bool OurWebThreeStubServer::authenticate(TransactionSkeleton const& _t)
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{
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if (_t.creation)
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{
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// recipient has no code - nothing special about this transaction, show basic value transfer info
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return showCreationNotice(_t);
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}
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h256 contractCodeHash = m_web3->ethereum()->postState().codeHash(_t.to);
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if (contractCodeHash == EmptySHA3)
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{
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// recipient has no code - nothing special about this transaction, show basic value transfer info
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return showSendNotice(_t);
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}
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string userNotice = m_main->natSpec()->getUserNotice(contractCodeHash, _t.data);
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if (userNotice.empty())
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return showUnknownCallNotice(_t);
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NatspecExpressionEvaluator evaluator;
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userNotice = evaluator.evalExpression(QString::fromStdString(userNotice)).toStdString();
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// otherwise it's a transaction to a contract for which we have the natspec
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return showAuthenticationPopup("Contract Transaction",
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"ÐApp attempting to conduct contract interaction with " +
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m_main->pretty(_t.to).toStdString() +
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": <b>" + userNotice + "</b>.\n\n" +
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(_t.value > 0 ?
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"In addition, ÐApp is attempting to send " +
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formatBalance(_t.value) + " to said recipient, with additional network fees of up to " +
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formatBalance(_t.gas * _t.gasPrice) + " = <b>" +
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formatBalance(_t.value + _t.gas * _t.gasPrice) + "</b>."
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:
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"Additional network fees are at most" +
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formatBalance(_t.gas * _t.gasPrice) + ".")
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);
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}
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