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fees.cpp
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// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2017 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 <wallet/fees.h>
#include <config.h>
#include <policy/policy.h>
#include <txmempool.h>
#include <util/system.h>
#include <validation.h>
#include <wallet/coincontrol.h>
#include <wallet/wallet.h>
Amount GetRequiredFee(const CWallet &wallet, unsigned int nTxBytes) {
return GetRequiredFeeRate(wallet).GetFeeCeiling(nTxBytes);
}
Amount GetMinimumFee(const CWallet &wallet, unsigned int nTxBytes,
const CCoinControl &coin_control, const CTxMemPool &pool) {
Amount nFeeNeeded =
GetMinimumFeeRate(wallet, coin_control, pool).GetFeeCeiling(nTxBytes);
// But always obey the maximum.
if (nFeeNeeded > maxTxFee) {
nFeeNeeded = maxTxFee;
}
return nFeeNeeded;
}
CFeeRate GetRequiredFeeRate(const CWallet &wallet) {
return std::max(wallet.m_min_fee, ::minRelayTxFee);
}
CFeeRate GetMinimumFeeRate(const CWallet &wallet,
const CCoinControl &coin_control,
const CTxMemPool &pool) {
CFeeRate neededFeeRate =
(coin_control.fOverrideFeeRate && coin_control.m_feerate)
? *coin_control.m_feerate
: wallet.m_pay_tx_fee;
if (neededFeeRate == CFeeRate()) {
neededFeeRate = pool.estimateFee();
// ... unless we don't have enough mempool data for estimatefee, then
// use fallback fee.
if (neededFeeRate == CFeeRate()) {
neededFeeRate = wallet.m_fallback_fee;
}
}
// Prevent user from paying a fee below minRelayTxFee or minTxFee.
return std::max(neededFeeRate, GetRequiredFeeRate(wallet));
}

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