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