Common.cpp

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/*
        This file is part of cpp-ethereum.

        cpp-ethereum is free software: you can redistribute it and/or modify
        it under the terms of the GNU General Public License as published by
        the Free Software Foundation, either version 3 of the License, or
        (at your option) any later version.

        cpp-ethereum is distributed in the hope that it will be useful,
        but WITHOUT ANY WARRANTY; without even the implied warranty of
        MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        GNU General Public License for more details.

        You should have received a copy of the GNU General Public License
        along with cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
*/
#include "Common.h"
#include <boost/algorithm/string/case_conv.hpp>
#include <libdevcore/Base64.h>
#include <libdevcore/Terminal.h>
#include <libdevcore/CommonData.h>
#include <libdevcore/CommonIO.h>
#include <libdevcore/Log.h>
#include <libdevcore/SHA3.h>
#include "ICAP.h"
#include "Exceptions.h"
#include "BlockHeader.h"

using namespace std;
using namespace dev;
using namespace dev::eth;

namespace dev
{
namespace eth
{

const unsigned c_protocolVersion = 63;
#if ETH_FATDB
const unsigned c_minorProtocolVersion = 3;
const unsigned c_databaseBaseVersion = 9;
const unsigned c_databaseVersionModifier = 1;
#else
const unsigned c_minorProtocolVersion = 2;
const unsigned c_databaseBaseVersion = 9;
const unsigned c_databaseVersionModifier = 0;
#endif

const unsigned c_databaseVersion = c_databaseBaseVersion + (c_databaseVersionModifier << 8) + (23 << 9);

Address toAddress(std::string const& _s)
{
        try
        {
                eth::ICAP i = eth::ICAP::decoded(_s);
                return i.direct();
        }
        catch (eth::InvalidICAP&) {}
        try
        {
                auto b = fromHex(_s.substr(0, 2) == "0x" ? _s.substr(2) : _s, WhenError::Throw);
                if (b.size() == 20)
                        return Address(b);
        }
        catch (BadHexCharacter&) {}
        BOOST_THROW_EXCEPTION(InvalidAddress());
}

vector<pair<u256, string>> const& units()
{
        static const vector<pair<u256, string>> s_units =
        {
                {exp10<54>(), "Uether"},
                {exp10<51>(), "Vether"},
                {exp10<48>(), "Dether"},
                {exp10<45>(), "Nether"},
                {exp10<42>(), "Yether"},
                {exp10<39>(), "Zether"},
                {exp10<36>(), "Eether"},
                {exp10<33>(), "Pether"},
                {exp10<30>(), "Tether"},
                {exp10<27>(), "Gether"},
                {exp10<24>(), "Mether"},
                {exp10<21>(), "grand"},
                {exp10<18>(), "ether"},
                {exp10<15>(), "finney"},
                {exp10<12>(), "szabo"},
                {exp10<9>(), "Gwei"},
                {exp10<6>(), "Mwei"},
                {exp10<3>(), "Kwei"},
                {exp10<0>(), "wei"}
        };

        return s_units;
}

std::string formatBalance(bigint const& _b)
{
        ostringstream ret;
        u256 b;
        if (_b < 0)
        {
                ret << "-";
                b = (u256)-_b;
        }
        else
                b = (u256)_b;

        if (b > units()[0].first * 1000)
        {
                ret << (b / units()[0].first) << " " << units()[0].second;
                return ret.str();
        }
        ret << setprecision(5);
        for (auto const& i: units())
                if (i.first != 1 && b >= i.first)
                {
                        ret << (double(b / (i.first / 1000)) / 1000.0) << " " << i.second;
                        return ret.str();
                }
        ret << b << " wei";
        return ret.str();
}

static void badBlockInfo(BlockHeader const& _bi, string const& _err)
{
        string const c_line = EthReset EthOnMaroon + string(80, ' ') + EthReset;
        string const c_border = EthReset EthOnMaroon + string(2, ' ') + EthReset EthMaroonBold;
        string const c_space = c_border + string(76, ' ') + c_border + EthReset;
        stringstream ss;
        ss << c_line << endl;
        ss << c_space << endl;
        ss << c_border + "  Import Failure     " + _err + string(max<int>(0, 53 - _err.size()), ' ') + "  " + c_border << endl;
        ss << c_space << endl;
        string bin = toString(_bi.number());
        ss << c_border + ("                     Guru Meditation #" + string(max<int>(0, 8 - bin.size()), '0') + bin + "." + _bi.hash().abridged() + "                    ") + c_border << endl;
        ss << c_space << endl;
        ss << c_line;
        cwarn << "\n" + ss.str();
}

void badBlock(bytesConstRef _block, string const& _err)
{
        BlockHeader bi;
        DEV_IGNORE_EXCEPTIONS(bi = BlockHeader(_block));
        badBlockInfo(bi, _err);
}

string TransactionSkeleton::userReadable(bool _toProxy, function<pair<bool, string>(TransactionSkeleton const&)> const& _getNatSpec, function<string(Address const&)> const& _formatAddress) const
{
        if (creation)
        {
                // show notice concerning the creation code. TODO: this needs entering into natspec.
                return string("ÐApp is attempting to create a contract; ") + (_toProxy ? "(this transaction is not executed directly, but forwarded to another ÐApp) " : "") + "to be endowed with " + formatBalance(value) + ", with additional network fees of up to " + formatBalance(gas * gasPrice) + ".\n\nMaximum total cost is " + formatBalance(value + gas * gasPrice) + ".";
        }

        bool isContract;
        std::string natSpec;
        tie(isContract, natSpec) = _getNatSpec(*this);
        if (!isContract)
        {
                // recipient has no code - nothing special about this transaction, show basic value transfer info
                return "ÐApp is attempting to send " + formatBalance(value) + " to a recipient " + _formatAddress(to) + (_toProxy ? " (this transaction is not executed directly, but forwarded to another ÐApp)" : "") + ", with additional network fees of up to " + formatBalance(gas * gasPrice) + ".\n\nMaximum total cost is " + formatBalance(value + gas * gasPrice) + ".";
        }

        if (natSpec.empty())
                return "ÐApp is attempting to call into an unknown contract at address " +
                                _formatAddress(to) + ".\n\n" +
                                (_toProxy ? "This transaction is not executed directly, but forwarded to another ÐApp.\n\n" : "")  +
                                "Call involves sending " +
                                formatBalance(value) + " to the recipient, with additional network fees of up to " +
                                formatBalance(gas * gasPrice) +
                                "However, this also does other stuff which we don't understand, and does so in your name.\n\n" +
                                "WARNING: This is probably going to cost you at least " +
                                formatBalance(value + gas * gasPrice) +
                                ", however this doesn't include any side-effects, which could be of far greater importance.\n\n" +
                                "REJECT UNLESS YOU REALLY KNOW WHAT YOU ARE DOING!";

        return "ÐApp attempting to conduct contract interaction with " +
        _formatAddress(to) +
        ": <b>" + natSpec + "</b>.\n\n" +
        (_toProxy ? "This transaction is not executed directly, but forwarded to another ÐApp.\n\n" : "") +
        (value > 0 ?
                "In addition, ÐApp is attempting to send " +
                formatBalance(value) + " to said recipient, with additional network fees of up to " +
                formatBalance(gas * gasPrice) + " = " +
                formatBalance(value + gas * gasPrice) + "."
        :
                "Additional network fees are at most" +
                formatBalance(gas * gasPrice) + ".");
}

}
}