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Merge #18275: wallet: error if an explicit fee rate was given but the needed fee rate differed

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44cc75f80ee7805a117e9298a182af1a44bcbff4 wallet: error if an explicit fee rate was given but the needed fee rate differed (Karl-Johan Alm)

Pull request description:

  This ensures that the code doesn't silently ignore too low fee reates. It will now trigger an error in the QT client, if the user provides a fee rate below the minimum, and becomes a necessary check for #11413.

ACKs for top commit:
  Sjors:
    utACK 44cc75f80ee7805a117e9298a182af1a44bcbff4 (rebased)
  fjahr:
    re-ACK 44cc75f80ee7805a117e9298a182af1a44bcbff4

Tree-SHA512: cd5a60ee496e64f7ab37aaa53f7748a7393357b1629ccd9660839d366c6191b6413b871ce3aa7293fce1539336222c300ef6f86304f30a1ae8fe361b02310483
This commit is contained in:
MarcoFalke 2020-06-16 13:46:06 -04:00 committed by Konstantin Akimov
parent d754799580
commit d530b73016
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GPG Key ID: 2176C4A5D01EA524
2 changed files with 11 additions and 1 deletions
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2
src/coinjoin/util.cpp
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@ -116,7 +116,7 @@ CTransactionBuilder::CTransactionBuilder(std::shared_ptr<CWallet> pwalletIn, con
// Generate a feerate which will be used to consider if the remainder is dust and will go into fees or not
coinControl.m_discard_feerate = ::GetDiscardRate(*pwallet);
// Generate a feerate which will be used by calculations of this class and also by CWallet::CreateTransaction
coinControl.m_feerate = std::max(pwallet->chain().estimateSmartFee(int(pwallet->m_confirm_target), true, nullptr), pwallet->m_pay_tx_fee);
coinControl.m_feerate = std::max(GetRequiredFeeRate(*pwallet), pwallet->m_pay_tx_fee);
// Change always goes back to origin
coinControl.destChange = tallyItemIn.txdest;
// Only allow tallyItems inputs for tx creation

10
src/wallet/wallet.cpp
View File

@ -3549,6 +3549,16 @@ bool CWallet::CreateTransactionInternal(
CMutableTransaction txNew;
FeeCalculation feeCalc;
CFeeRate discard_rate = coin_control.m_discard_feerate ? *coin_control.m_discard_feerate : GetDiscardRate(*this);
// Get the fee rate to use effective values in coin selection
CFeeRate nFeeRateNeeded = GetMinimumFeeRate(*this, coin_control, &feeCalc);
// Do not, ever, assume that it's fine to change the fee rate if the user has explicitly
// provided one
if (coin_control.m_feerate && nFeeRateNeeded > *coin_control.m_feerate) {
error = strprintf(_("Fee rate (%s) is lower than the minimum fee rate setting (%s)"), coin_control.m_feerate->ToString(), nFeeRateNeeded.ToString());
return false;
}
int nBytes{0};
{
std::vector<CInputCoin> vecCoins;