/*
	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/Exceptions.h>
#include <libdevcore/FixedHash.h>

namespace dev
{
namespace eth
{

/// The network id.
enum class Network
{
	Olympic = 0,
	Frontier = 1,
	Turbo = 2
};
extern Network c_network;

Network resetNetwork(Network _n);

/// An Ethereum address: 20 bytes.
/// @NOTE This is not endian-specific; it's just a bunch of bytes.
using Address = h160;

DEV_SIMPLE_EXCEPTION(InvalidAddress);

/// 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 shannon = exp10<9>();
static const u256 wei = exp10<0>();

using Nonce = h64;

using BlockNumber = unsigned;

// TODO: move back into a mining subsystem and have it be accessible from Sealant only via a dynamic_cast.
/**
 * @brief Describes the progress of a mining operation.
 */
struct WorkingProgress
{
//	MiningProgress& operator+=(MiningProgress const& _mp) { hashes += _mp.hashes; ms = std::max(ms, _mp.ms); return *this; }
	uint64_t hashes = 0;		///< Total number of hashes computed.
	uint64_t ms = 0;			///< Total number of milliseconds of mining thus far.
	uint64_t rate() const { return ms == 0 ? 0 : hashes * 1000 / ms; }
};

}
}