85 lines
2.7 KiB
C++
85 lines
2.7 KiB
C++
// Copyright (c) 2009-2010 Satoshi Nakamoto
|
|
// Copyright (c) 2009-2018 The Bitcoin Core developers
|
|
// Distributed under the MIT software license, see the accompanying
|
|
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
|
|
|
|
#include <policy/feerate.h>
|
|
|
|
#include <tinyformat.h>
|
|
|
|
static const CAmount BASE_MWEB_FEE = 100;
|
|
|
|
CFeeRate::CFeeRate(const CAmount& nFeePaid, size_t nBytes_, uint64_t mweb_weight)
|
|
: m_nFeePaid(nFeePaid), m_nBytes(nBytes_), m_weight(mweb_weight)
|
|
{
|
|
assert(nBytes_ <= uint64_t(std::numeric_limits<int64_t>::max()));
|
|
assert(mweb_weight <= uint64_t(std::numeric_limits<int64_t>::max()));
|
|
|
|
CAmount mweb_fee = CAmount(mweb_weight) * BASE_MWEB_FEE;
|
|
if (mweb_fee > 0 && nFeePaid < mweb_fee) {
|
|
nSatoshisPerK = 0;
|
|
} else {
|
|
CAmount ltc_fee = (nFeePaid - mweb_fee);
|
|
|
|
int64_t nSize = int64_t(nBytes_);
|
|
if (nSize > 0)
|
|
nSatoshisPerK = ltc_fee * 1000 / nSize;
|
|
else
|
|
nSatoshisPerK = 0;
|
|
}
|
|
}
|
|
|
|
CAmount CFeeRate::GetFee(size_t nBytes_) const
|
|
{
|
|
assert(nBytes_ <= uint64_t(std::numeric_limits<int64_t>::max()));
|
|
int64_t nSize = int64_t(nBytes_);
|
|
|
|
CAmount nFee = nSatoshisPerK * nSize / 1000;
|
|
|
|
if (nFee == 0 && nSize != 0) {
|
|
if (nSatoshisPerK > 0)
|
|
nFee = CAmount(1);
|
|
if (nSatoshisPerK < 0)
|
|
nFee = CAmount(-1);
|
|
}
|
|
|
|
return nFee;
|
|
}
|
|
|
|
CAmount CFeeRate::GetMWEBFee(uint64_t mweb_weight) const
|
|
{
|
|
assert(mweb_weight <= uint64_t(std::numeric_limits<int64_t>::max()));
|
|
return CAmount(mweb_weight) * BASE_MWEB_FEE;
|
|
}
|
|
|
|
CAmount CFeeRate::GetTotalFee(size_t nBytes, uint64_t mweb_weight) const
|
|
{
|
|
return GetFee(nBytes) + GetMWEBFee(mweb_weight);
|
|
}
|
|
|
|
bool CFeeRate::MeetsFeePerK(const CAmount& min_fee_per_k) const
|
|
{
|
|
// (mweb_weight * BASE_MWEB_FEE) litoshis are required as fee for MWEB transactions.
|
|
// Anything beyond that can be used to calculate nSatoshisPerK.
|
|
CAmount mweb_fee = CAmount(m_weight) * BASE_MWEB_FEE;
|
|
if (m_weight > 0 && m_nFeePaid < mweb_fee) {
|
|
return false;
|
|
}
|
|
|
|
// MWEB-to-MWEB transactions don't have a size to calculate nSatoshisPerK.
|
|
// Since we got this far, we know the transaction meets the minimum MWEB fee, so return true.
|
|
if (m_nBytes == 0 && m_weight > 0) {
|
|
return true;
|
|
}
|
|
|
|
return nSatoshisPerK >= min_fee_per_k;
|
|
}
|
|
|
|
std::string CFeeRate::ToString(const FeeEstimateMode& fee_estimate_mode) const
|
|
{
|
|
switch (fee_estimate_mode) {
|
|
case FeeEstimateMode::SAT_VB: return strprintf("%d.%03d %s/vB", nSatoshisPerK / 1000, nSatoshisPerK % 1000, CURRENCY_ATOM);
|
|
default: return strprintf("%d.%08d %s/kvB", nSatoshisPerK / COIN, nSatoshisPerK % COIN, CURRENCY_UNIT);
|
|
}
|
|
}
|