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// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2015 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#ifndef BITCOIN_AMOUNT_H
#define BITCOIN_AMOUNT_H
#include "serialize.h"
#include <stdlib.h>
#include <string>
/** Amount in satoshis (Can be negative) */
typedef int64_t CAmount;
static const CAmount COIN = 100000000;
static const CAmount CENT = 1000000;
extern const std::string CURRENCY_UNIT;
/** No amount larger than this (in satoshi) is valid.
*
* Note that this constant is *not* the total money supply, which in Bitcoin
* currently happens to be less than 21,000,000 BTC for various reasons, but
* rather a sanity check. As this sanity check is used by consensus-critical
* validation code, the exact value of the MAX_MONEY constant is consensus
* critical; in unusual circumstances like a(nother) overflow bug that allowed
* for the creation of coins out of thin air modification could lead to a fork.
* */
static const CAmount MAX_MONEY = 21000000 * COIN;
inline bool MoneyRange(const CAmount& nValue) { return (nValue >= 0 && nValue <= MAX_MONEY); }
/**
* Fee rate in satoshis per kilobyte: CAmount / kB
*/
class CFeeRate
{
private:
CAmount nSatoshisPerK; // unit is satoshis-per-1,000-bytes
public:
/** Fee rate of 0 satoshis per kB */
CFeeRate() : nSatoshisPerK(0) { }
explicit CFeeRate(const CAmount& _nSatoshisPerK): nSatoshisPerK(_nSatoshisPerK) { }
/** Constructor for a fee rate in satoshis per kB. The size in bytes must not exceed (2^63 - 1)*/
CFeeRate(const CAmount& nFeePaid, size_t nBytes);
CFeeRate(const CFeeRate& other) { nSatoshisPerK = other.nSatoshisPerK; }
/**
* Return the fee in satoshis for the given size in bytes.
*/
CAmount GetFee(size_t nBytes) const;
/**
* Return the fee in satoshis for a size of 1000 bytes
*/
CAmount GetFeePerK() const { return GetFee(1000); }
friend bool operator<(const CFeeRate& a, const CFeeRate& b) { return a.nSatoshisPerK < b.nSatoshisPerK; }
friend bool operator>(const CFeeRate& a, const CFeeRate& b) { return a.nSatoshisPerK > b.nSatoshisPerK; }
friend bool operator==(const CFeeRate& a, const CFeeRate& b) { return a.nSatoshisPerK == b.nSatoshisPerK; }
friend bool operator<=(const CFeeRate& a, const CFeeRate& b) { return a.nSatoshisPerK <= b.nSatoshisPerK; }
friend bool operator>=(const CFeeRate& a, const CFeeRate& b) { return a.nSatoshisPerK >= b.nSatoshisPerK; }
CFeeRate& operator+=(const CFeeRate& a) { nSatoshisPerK += a.nSatoshisPerK; return *this; }
std::string ToString() const;
ADD_SERIALIZE_METHODS;
template <typename Stream, typename Operation>
inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
READWRITE(nSatoshisPerK);
}
};
#endif // BITCOIN_AMOUNT_H

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