mirror of
https://github.com/cculianu/Fulcrum.git
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195551dfe7
We will need this in the future to verify tx's and compose tx's The Tx class is pretty usable as-is.. just manipulates a byte stream.
63 lines
1.9 KiB
C++
63 lines
1.9 KiB
C++
// Copyright (c) 2009-2010 Satoshi Nakamoto
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// Copyright (c) 2009-2016 The Bitcoin Core developers
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// Copyright (c) 2017-2018 The Bitcoin 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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#include "feerate.h"
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#include "amount.h"
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#include "tinyformat.h"
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namespace bitcoin {
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CFeeRate::CFeeRate(const Amount nFeePaid, size_t nBytes_) {
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assert(nBytes_ <= uint64_t(std::numeric_limits<int64_t>::max()));
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int64_t nSize = int64_t(nBytes_);
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if (nSize > 0) {
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nSatoshisPerK = 1000 * nFeePaid / nSize;
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} else {
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nSatoshisPerK = Amount::zero();
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}
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}
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template <bool ceil>
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static Amount GetFee(size_t nBytes_, Amount nSatoshisPerK) {
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assert(nBytes_ <= uint64_t(std::numeric_limits<int64_t>::max()));
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int64_t nSize = int64_t(nBytes_);
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// Ensure fee is rounded up when truncated if ceil is true.
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Amount nFee = Amount::zero();
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if (ceil) {
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nFee = Amount(nSize * nSatoshisPerK % 1000 > Amount::zero()
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? nSize * nSatoshisPerK / 1000 + SATOSHI
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: nSize * nSatoshisPerK / 1000);
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} else {
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nFee = nSize * nSatoshisPerK / 1000;
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}
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if (nFee == Amount::zero() && nSize != 0) {
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if (nSatoshisPerK > Amount::zero()) {
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nFee = SATOSHI;
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}
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if (nSatoshisPerK < Amount::zero()) {
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nFee = -SATOSHI;
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}
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}
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return nFee;
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}
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Amount CFeeRate::GetFee(size_t nBytes) const {
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return bitcoin::GetFee<false>(nBytes, nSatoshisPerK);
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}
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Amount CFeeRate::GetFeeCeiling(size_t nBytes) const {
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return bitcoin::GetFee<true>(nBytes, nSatoshisPerK);
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}
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std::string CFeeRate::ToString() const {
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return strprintf("%d.%08d %s/kB", nSatoshisPerK / COIN,
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(nSatoshisPerK % COIN) / SATOSHI, CURRENCY_UNIT);
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}
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} // end namespace bitcoin
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