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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/>.
*/
/** @file Common.h
* @author Gav Wood <i@gavwood.com>
* @date 2014
*
* Ethereum-specific data structures & algorithms.
*/
#pragma once
#include <string>
#include <functional>
#include <libdevcore/Common.h>
#include <libdevcore/FixedHash.h>
#include <libdevcrypto/Common.h>
namespace dev
{
namespace eth
{
/// Current protocol version.
extern const unsigned c_protocolVersion;
/// Current minor protocol version.
extern const unsigned c_minorProtocolVersion;
/// Current database version.
extern const unsigned c_databaseVersion;
/// User-friendly string representation of the amount _b in wei.
std::string formatBalance(bigint const& _b);
/// Get information concerning the currency denominations.
std::vector<std::pair<u256, std::string>> const& units();
/// The log bloom's size (2048-bit).
using LogBloom = h2048;
/// Many log blooms.
using LogBlooms = std::vector<LogBloom>;
template <size_t n> inline u256 exp10()
{
return exp10<n - 1>() * u256(10);
}
template <> inline u256 exp10<0>()
{
return u256(1);
}
// The various denominations; here for ease of use where needed within code.
static const u256 ether = exp10<18>();
static const u256 finney = exp10<15>();
static const u256 szabo = exp10<12>();
static const u256 wei = exp10<0>();
using Nonce = h64;
using BlockNumber = unsigned;
static const BlockNumber LatestBlock = (BlockNumber)-2;
static const BlockNumber PendingBlock = (BlockNumber)-1;
enum class RelativeBlock: BlockNumber
{
Latest = LatestBlock,
Pending = PendingBlock
};
enum class ImportResult
{
Success = 0,
UnknownParent,
FutureTime,
AlreadyInChain,
AlreadyKnown,
Malformed,
BadChain
};
struct ImportRequirements
{
using value = unsigned;
enum
{
ValidNonce = 1, ///< Validate nonce
DontHave = 2, ///< Avoid old blocks
CheckUncles = 4, ///< Check uncle nonces
Default = ValidNonce | DontHave | CheckUncles
};
};
/// Super-duper signal mechanism. TODO: replace with somthing a bit heavier weight.
class Signal
{
public:
class HandlerAux
{
friend class Signal;
public:
~HandlerAux() { if (m_s) m_s->m_fire.erase(m_i); m_s = nullptr; }
private:
HandlerAux(unsigned _i, Signal* _s): m_i(_i), m_s(_s) {}
unsigned m_i = 0;
Signal* m_s = nullptr;
};
using Callback = std::function<void()>;
std::shared_ptr<HandlerAux> add(Callback const& _h) { auto n = m_fire.empty() ? 0 : (m_fire.rbegin()->first + 1); m_fire[n] = _h; return std::shared_ptr<HandlerAux>(new HandlerAux(n, this)); }
void operator()() { for (auto const& f: m_fire) f.second(); }
private:
std::map<unsigned, Callback> m_fire;
};
using Handler = std::shared_ptr<Signal::HandlerAux>;
struct TransactionSkeleton
{
bool creation = false;
Address from;
Address to;
u256 value;
bytes data;
u256 gas = UndefinedU256;
u256 gasPrice = UndefinedU256;
};
void badBlockHeader(bytesConstRef _header, std::string const& _err);
inline void badBlockHeader(bytes const& _header, std::string const& _err) { badBlockHeader(&_header, _err); }
void badBlock(bytesConstRef _header, std::string const& _err);
inline void badBlock(bytes const& _header, std::string const& _err) { badBlock(&_header, _err); }
}
}