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 <libdevcore/Base64.h>
#include <libdevcore/Terminal.h>
#include <libdevcore/CommonIO.h>
#include <libdevcore/Log.h>
#include <libdevcore/SHA3.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);
 
const Address c_blockhashContractAddress(0xf0);
const bytes c_blockhashContractCode(fromHex("0x600073fffffffffffffffffffffffffffffffffffffffe33141561005957600143035b60011561005357600035610100820683015561010081061561004057005b6101008104905061010082019150610022565b506100e0565b4360003512156100d4576000356001814303035b61010081121515610085576000610100830614610088565b60005b156100a75761010083019250610100820491506101008104905061006d565b610100811215156100bd57600060a052602060a0f35b610100820683015460c052602060c0f350506100df565b600060e052602060e0f35b5b50"));
 
Address toAddress(std::string const& _s)
{
    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 << "\n";
    ss << c_space << "\n";
    ss << c_border + "  Import Failure     " + _err + string(max<int>(0, 53 - _err.size()), ' ') + "  " + c_border << "\n";
    ss << c_space << "\n";
    string bin = toString(_bi.number());
    ss << c_border + ("                     Bad Block #" + string(max<int>(0, 8 - bin.size()), '0') + bin + "." + _bi.hash().abridged() + "                    ") + c_border << "\n";
    ss << c_space << "\n";
    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) + ".");
}
 
}
}