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-rw-r--r--src/wallet/wallet.cpp23
1 files changed, 13 insertions, 10 deletions
diff --git a/src/wallet/wallet.cpp b/src/wallet/wallet.cpp
index c926f0159f..3cb0c308fd 100644
--- a/src/wallet/wallet.cpp
+++ b/src/wallet/wallet.cpp
@@ -2612,6 +2612,7 @@ bool CWallet::CreateTransaction(const std::vector<CRecipient>& vecSend, CWalletT
assert(txNew.nLockTime <= (unsigned int)chainActive.Height());
assert(txNew.nLockTime < LOCKTIME_THRESHOLD);
FeeCalculation feeCalc;
+ CAmount nFeeNeeded;
unsigned int nBytes;
{
std::set<CInputCoin> setCoins;
@@ -2773,7 +2774,7 @@ bool CWallet::CreateTransaction(const std::vector<CRecipient>& vecSend, CWalletT
vin.scriptWitness.SetNull();
}
- CAmount nFeeNeeded = GetMinimumFee(nBytes, coin_control, ::mempool, ::feeEstimator, &feeCalc);
+ nFeeNeeded = GetMinimumFee(nBytes, coin_control, ::mempool, ::feeEstimator, &feeCalc);
// If we made it here and we aren't even able to meet the relay fee on the next pass, give up
// because we must be at the maximum allowed fee.
@@ -2794,13 +2795,15 @@ bool CWallet::CreateTransaction(const std::vector<CRecipient>& vecSend, CWalletT
// new inputs. We now know we only need the smaller fee
// (because of reduced tx size) and so we should add a
// change output. Only try this once.
- CAmount fee_needed_for_change = GetMinimumFee(change_prototype_size, coin_control, ::mempool, ::feeEstimator, nullptr);
- CAmount minimum_value_for_change = GetDustThreshold(change_prototype_txout, discard_rate);
- CAmount max_excess_fee = fee_needed_for_change + minimum_value_for_change;
- if (nFeeRet > nFeeNeeded + max_excess_fee && nChangePosInOut == -1 && nSubtractFeeFromAmount == 0 && pick_new_inputs) {
- pick_new_inputs = false;
- nFeeRet = nFeeNeeded + fee_needed_for_change;
- continue;
+ if (nChangePosInOut == -1 && nSubtractFeeFromAmount == 0 && pick_new_inputs) {
+ unsigned int tx_size_with_change = nBytes + change_prototype_size + 2; // Add 2 as a buffer in case increasing # of outputs changes compact size
+ CAmount fee_needed_with_change = GetMinimumFee(tx_size_with_change, coin_control, ::mempool, ::feeEstimator, nullptr);
+ CAmount minimum_value_for_change = GetDustThreshold(change_prototype_txout, discard_rate);
+ if (nFeeRet >= fee_needed_with_change + minimum_value_for_change) {
+ pick_new_inputs = false;
+ nFeeRet = fee_needed_with_change;
+ continue;
+ }
}
// If we have change output already, just increase it
@@ -2895,8 +2898,8 @@ bool CWallet::CreateTransaction(const std::vector<CRecipient>& vecSend, CWalletT
}
}
- LogPrintf("Fee Calculation: Fee:%d Bytes:%u Tgt:%d (requested %d) Reason:\"%s\" Decay %.5f: Estimation: (%g - %g) %.2f%% %.1f/(%.1f %d mem %.1f out) Fail: (%g - %g) %.2f%% %.1f/(%.1f %d mem %.1f out)\n",
- nFeeRet, nBytes, feeCalc.returnedTarget, feeCalc.desiredTarget, StringForFeeReason(feeCalc.reason), feeCalc.est.decay,
+ LogPrintf("Fee Calculation: Fee:%d Bytes:%u Needed:%d Tgt:%d (requested %d) Reason:\"%s\" Decay %.5f: Estimation: (%g - %g) %.2f%% %.1f/(%.1f %d mem %.1f out) Fail: (%g - %g) %.2f%% %.1f/(%.1f %d mem %.1f out)\n",
+ nFeeRet, nBytes, nFeeNeeded, feeCalc.returnedTarget, feeCalc.desiredTarget, StringForFeeReason(feeCalc.reason), feeCalc.est.decay,
feeCalc.est.pass.start, feeCalc.est.pass.end,
100 * feeCalc.est.pass.withinTarget / (feeCalc.est.pass.totalConfirmed + feeCalc.est.pass.inMempool + feeCalc.est.pass.leftMempool),
feeCalc.est.pass.withinTarget, feeCalc.est.pass.totalConfirmed, feeCalc.est.pass.inMempool, feeCalc.est.pass.leftMempool,