mirror of
https://github.com/ElementsProject/elements.git
synced 2026-08-16 13:01:19 +02:00
129 lines
5.2 KiB
C++
129 lines
5.2 KiB
C++
// Copyright (c) 2009-2010 Satoshi Nakamoto
|
||
// Copyright (c) 2009-2016 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 "uint256.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;
|
||
|
||
/**
|
||
* Native Asset Issuance
|
||
*
|
||
* An asset identifier tag, a 256 bits serialized hash (sha256) defined
|
||
* by the issuance transaction from which the output’s coins are derived.
|
||
* Each output contains coins from a single asset/currency.
|
||
* For the host currency, the similarly-calculated hash of the chain’s genesis
|
||
* block is used instead.
|
||
**/
|
||
typedef uint256 CAssetID;
|
||
|
||
/** The sha256 of Bitcoin genesis block, for easy reference **/
|
||
static const CAssetID BITCOINID(uint256S("09f663de96be771f50cab5ded00256ffe63773e2eaa9a604092951cc3d7c6621"));
|
||
|
||
/** Used for consensus fee and general wallet accounting*/
|
||
typedef std::map<CAssetID, CAmount> CAmountMap;
|
||
|
||
CAmountMap& operator+=(CAmountMap& a, const CAmountMap& b);
|
||
CAmountMap& operator-=(CAmountMap& a, const CAmountMap& b);
|
||
CAmountMap operator+(const CAmountMap& a, const CAmountMap& b);
|
||
CAmountMap operator-(const CAmountMap& a, const CAmountMap& b);
|
||
|
||
// WARNING: Comparisons are only looking for *complete* ordering.
|
||
// For strict inequality checks, if any entry would fail the non-strict
|
||
// inequality, the comparison will fail. Therefore it is possible
|
||
// that all inequality comparison checks may fail.
|
||
// Therefore if >/< fails against a CAmountMap(), this means there
|
||
// are all zeroes or one or more negative values.
|
||
//
|
||
// Examples: 1A + 2B <= 1A + 2B + 1C
|
||
// and 1A + 2B < 1A + 2B + 1C
|
||
// but
|
||
// !(1A + 2B == 1A + 2B + 1C)
|
||
//-------------------------------------
|
||
// 1A + 2B == 1A + 2B
|
||
// and 1A + 2B <= 1A + 2B
|
||
// but
|
||
// !(1A + 2B < 1A + 2B)
|
||
//-------------------------------------
|
||
// !(1A + 2B == 2B - 1C)
|
||
// !(1A + 2B >= 2B - 1C)
|
||
// ...
|
||
// !(1A + 2B < 2B - 1C)
|
||
// and 1A + 2B != 2B - 1C
|
||
bool operator<(const CAmountMap& a, const CAmountMap& b);
|
||
bool operator<=(const CAmountMap& a, const CAmountMap& b);
|
||
bool operator>(const CAmountMap& a, const CAmountMap& b);
|
||
bool operator>=(const CAmountMap& a, const CAmountMap& b);
|
||
bool operator==(const CAmountMap& a, const CAmountMap& b);
|
||
bool operator!=(const CAmountMap& a, const CAmountMap& b);
|
||
|
||
/** 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); }
|
||
|
||
inline bool MoneyRange(const CAmountMap& mapValue) {
|
||
for(CAmountMap::const_iterator it = mapValue.begin(); it != mapValue.end(); it++)
|
||
if (it->second < 0 || it->second > MAX_MONEY)
|
||
return false;
|
||
return true;
|
||
}
|
||
/**
|
||
* 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) {
|
||
READWRITE(nSatoshisPerK);
|
||
}
|
||
};
|
||
|
||
#endif // BITCOIN_AMOUNT_H
|