git / moonbite-core / src/policy/feerate.h · raw

// Copyright (c) 2009-2010 Satoshi Nakamoto// Copyright (c) 2009-2019 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_POLICY_FEERATE_H#define BITCOIN_POLICY_FEERATE_H#include <amount.h>#include <serialize.h>#include <string>const std::string CURRENCY_UNIT = "MBITE"; // One formatted unitconst std::string CURRENCY_ATOM = "sat"; // One indivisible minimum value unit/* Used to determine type of fee estimation requested */enum class FeeEstimateMode {    UNSET,        //!< Use default settings based on other criteria    ECONOMICAL,   //!< Force estimateSmartFee to use non-conservative estimates    CONSERVATIVE, //!< Force estimateSmartFee to use conservative estimates    BTC_KVB,      //!< Use BTC/kvB fee rate unit    SAT_VB,       //!< Use sat/vB fee rate unit};/** * Fee rate in satoshis per kilobyte: CAmount / kB */class CFeeRate{private:    CAmount nSatoshisPerK; // unit is satoshis-per-1,000-bytes    CAmount m_nFeePaid;    size_t m_nBytes;    uint64_t m_weight;public:    /** Fee rate of 0 satoshis per kB */    CFeeRate() : nSatoshisPerK(0) { }    template<typename I>    explicit CFeeRate(const I _nSatoshisPerK): nSatoshisPerK(_nSatoshisPerK) {        // We've previously had bugs creep in from silent double->int conversion...        static_assert(std::is_integral<I>::value, "CFeeRate should be used without floats");    }    /** Constructor for a fee rate in satoshis per kvB (sat/kvB). The size in bytes must not exceed (2^63 - 1).     *     *  Passing an nBytes value of COIN (1e8) returns a fee rate in satoshis per vB (sat/vB),     *  e.g. (nFeePaid * 1e8 / 1e3) == (nFeePaid / 1e5),     *  where 1e5 is the ratio to convert from BTC/kvB to sat/vB.     *     *  @param[in] nFeePaid  CAmount fee rate to construct with     *  @param[in] nBytes    size_t bytes (units) to construct with     *  @returns   fee rate     */    CFeeRate(const CAmount& nFeePaid, size_t nBytes_, uint64_t mweb_weight);    /**     * Return the fee in satoshis for the given size in bytes.     */    CAmount GetFee(size_t nBytes_) const;    /**     * Return the fee in satoshis for the given MWEB weight.     */    CAmount GetMWEBFee(uint64_t mweb_weight) const;    /**     * Return the fee in satoshis for the given size in bytes & MWEB weight.     */    CAmount GetTotalFee(size_t nBytes, uint64_t mweb_weight) const;    /**     * Return the fee in satoshis for a size of 1000 bytes     */    CAmount GetFeePerK() const { return GetFee(1000); }    bool MeetsFeePerK(const CAmount& min_fee_per_k) const;    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; }    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 FeeEstimateMode& fee_estimate_mode = FeeEstimateMode::BTC_KVB) const;    SERIALIZE_METHODS(CFeeRate, obj) { READWRITE(obj.nSatoshisPerK); }};#endif //  BITCOIN_POLICY_FEERATE_H