diff options
| -rw-r--r-- | doc/release-notes.md | 20 | ||||
| -rw-r--r-- | src/core.h | 3 | ||||
| -rw-r--r-- | src/init.cpp | 7 | ||||
| -rw-r--r-- | src/main.cpp | 13 | ||||
| -rw-r--r-- | src/main.h | 9 | ||||
| -rw-r--r-- | src/qt/coincontroldialog.cpp | 48 | ||||
| -rw-r--r-- | src/qt/coincontroldialog.h | 3 | ||||
| -rw-r--r-- | src/wallet.cpp | 44 | ||||
| -rw-r--r-- | src/wallet.h | 5 |
9 files changed, 105 insertions, 47 deletions
diff --git a/doc/release-notes.md b/doc/release-notes.md index 3a4079e437..66059800b6 100644 --- a/doc/release-notes.md +++ b/doc/release-notes.md @@ -1,6 +1,26 @@ (note: this is a temporary file, to be added-to by anybody, and moved to release-notes at release time) +Transaction fee changes +======================= + +This release automatically estimates how high a transaction fee (or how +high a priority) transactions require to be confirmed quickly. The default +settings will create transactions that confirm quickly; see the new +'txconfirmtarget' setting to control the tradeoff between fees and +confirmation times. + +Prior releases used hard-coded fees (and priorities), and would +sometimes create transactions that took a very long time to confirm. + + +New Command Line Options +======================== + +-txconfirmtarget=n : create transactions that have enough fees (or priority) +so they are likely to confirm within n blocks (default: 1). This setting +is over-ridden by the -paytxfee option. + New RPC methods =============== diff --git a/src/core.h b/src/core.h index 8606831575..d6e7ab870d 100644 --- a/src/core.h +++ b/src/core.h @@ -131,7 +131,8 @@ public: friend bool operator<(const CFeeRate& a, const CFeeRate& b) { return a.nSatoshisPerK < b.nSatoshisPerK; } friend bool operator>(const CFeeRate& a, const CFeeRate& b) { return a.nSatoshisPerK > b.nSatoshisPerK; } friend bool operator==(const CFeeRate& a, const CFeeRate& b) { return a.nSatoshisPerK == b.nSatoshisPerK; } - + friend bool operator<=(const CFeeRate& a, const CFeeRate& b) { return a.nSatoshisPerK <= b.nSatoshisPerK; } + friend bool operator>=(const CFeeRate& a, const CFeeRate& b) { return a.nSatoshisPerK >= b.nSatoshisPerK; } std::string ToString() const; IMPLEMENT_SERIALIZE( READWRITE(nSatoshisPerK); ) diff --git a/src/init.cpp b/src/init.cpp index 2dd141a735..3ee0f2aa39 100644 --- a/src/init.cpp +++ b/src/init.cpp @@ -254,6 +254,7 @@ std::string HelpMessage(HelpMessageMode mode) strUsage += "\n" + _("Wallet options:") + "\n"; strUsage += " -disablewallet " + _("Do not load the wallet and disable wallet RPC calls") + "\n"; strUsage += " -paytxfee=<amt> " + strprintf(_("Fee (in BTC/kB) to add to transactions you send (default: %s)"), FormatMoney(payTxFee.GetFeePerK())) + "\n"; + strUsage += " -txconfirmtarget=<n> " + _("If paytxfee is not set, include enough fee so transactions are confirmed on average within n blocks (default: 1)") + "\n"; strUsage += " -rescan " + _("Rescan the block chain for missing wallet transactions") + " " + _("on startup") + "\n"; strUsage += " -salvagewallet " + _("Attempt to recover private keys from a corrupt wallet.dat") + " " + _("on startup") + "\n"; strUsage += " -spendzeroconfchange " + _("Spend unconfirmed change when sending transactions (default: 1)") + "\n"; @@ -635,7 +636,13 @@ bool AppInit2(boost::thread_group& threadGroup) if (nFeePerK > nHighTransactionFeeWarning) InitWarning(_("Warning: -paytxfee is set very high! This is the transaction fee you will pay if you send a transaction.")); payTxFee = CFeeRate(nFeePerK, 1000); + if (payTxFee < CTransaction::minRelayTxFee) + { + return InitError(strprintf(_("Invalid amount for -paytxfee=<amount>: '%s' (must be at least %s)"), + mapArgs["-paytxfee"], CTransaction::minRelayTxFee.ToString())); + } } + nTxConfirmTarget = GetArg("-txconfirmtarget", 1); bSpendZeroConfChange = GetArg("-spendzeroconfchange", true); std::string strWalletFile = GetArg("-wallet", "wallet.dat"); diff --git a/src/main.cpp b/src/main.cpp index 04d9523e26..6be1a29c6c 100644 --- a/src/main.cpp +++ b/src/main.cpp @@ -858,7 +858,7 @@ bool CheckTransaction(const CTransaction& tx, CValidationState &state) return true; } -int64_t GetMinFee(const CTransaction& tx, unsigned int nBytes, bool fAllowFree, enum GetMinFee_mode mode) +int64_t GetMinRelayFee(const CTransaction& tx, unsigned int nBytes, bool fAllowFree) { { LOCK(mempool.cs); @@ -870,10 +870,7 @@ int64_t GetMinFee(const CTransaction& tx, unsigned int nBytes, bool fAllowFree, return 0; } - // Base fee is either minTxFee or minRelayTxFee - CFeeRate baseFeeRate = (mode == GMF_RELAY) ? tx.minRelayTxFee : tx.minTxFee; - - int64_t nMinFee = baseFeeRate.GetFee(nBytes); + int64_t nMinFee = tx.minRelayTxFee.GetFee(nBytes); if (fAllowFree) { @@ -881,9 +878,7 @@ int64_t GetMinFee(const CTransaction& tx, unsigned int nBytes, bool fAllowFree, // * If we are relaying we allow transactions up to DEFAULT_BLOCK_PRIORITY_SIZE - 1000 // to be considered to fall into this category. We don't want to encourage sending // multiple transactions instead of one big transaction to avoid fees. - // * If we are creating a transaction we allow transactions up to 1,000 bytes - // to be considered safe and assume they can likely make it into this section. - if (nBytes < (mode == GMF_SEND ? 1000 : (DEFAULT_BLOCK_PRIORITY_SIZE - 1000))) + if (nBytes < (DEFAULT_BLOCK_PRIORITY_SIZE - 1000)) nMinFee = 0; } @@ -1005,7 +1000,7 @@ bool AcceptToMemoryPool(CTxMemPool& pool, CValidationState &state, const CTransa unsigned int nSize = entry.GetTxSize(); // Don't accept it if it can't get into a block - int64_t txMinFee = GetMinFee(tx, nSize, true, GMF_RELAY); + int64_t txMinFee = GetMinRelayFee(tx, nSize, true); if (fLimitFree && nFees < txMinFee) return state.DoS(0, error("AcceptToMemoryPool : not enough fees %s, %d < %d", hash.ToString(), nFees, txMinFee), diff --git a/src/main.h b/src/main.h index 19f4469008..e8df17dda0 100644 --- a/src/main.h +++ b/src/main.h @@ -245,14 +245,7 @@ struct CDiskTxPos : public CDiskBlockPos }; - -enum GetMinFee_mode -{ - GMF_RELAY, - GMF_SEND, -}; - -int64_t GetMinFee(const CTransaction& tx, unsigned int nBytes, bool fAllowFree, enum GetMinFee_mode mode); +int64_t GetMinRelayFee(const CTransaction& tx, unsigned int nBytes, bool fAllowFree); // // Check transaction inputs, and make sure any diff --git a/src/qt/coincontroldialog.cpp b/src/qt/coincontroldialog.cpp index c6a6150392..73494f52ea 100644 --- a/src/qt/coincontroldialog.cpp +++ b/src/qt/coincontroldialog.cpp @@ -16,6 +16,8 @@ #include "main.h" #include "wallet.h" +#include <boost/assign/list_of.hpp> // for 'map_list_of()' + #include <QApplication> #include <QCheckBox> #include <QCursor> @@ -400,23 +402,24 @@ void CoinControlDialog::viewItemChanged(QTreeWidgetItem* item, int column) } // return human readable label for priority number -QString CoinControlDialog::getPriorityLabel(double dPriority) +QString CoinControlDialog::getPriorityLabel(const CTxMemPool& pool, double dPriority) { - if (AllowFree(dPriority)) // at least medium + // confirmations -> textual description + typedef std::map<unsigned int, QString> PriorityDescription; + static PriorityDescription priorityDescriptions = boost::assign::map_list_of + (1, tr("highest"))(2, tr("higher"))(3, tr("high")) + (5, tr("medium-high"))(6, tr("medium")) + (10, tr("low-medium"))(15, tr("low")) + (20, tr("lower")); + + BOOST_FOREACH(const PriorityDescription::value_type& i, priorityDescriptions) { - if (AllowFree(dPriority / 1000000)) return tr("highest"); - else if (AllowFree(dPriority / 100000)) return tr("higher"); - else if (AllowFree(dPriority / 10000)) return tr("high"); - else if (AllowFree(dPriority / 1000)) return tr("medium-high"); - else return tr("medium"); - } - else - { - if (AllowFree(dPriority * 10)) return tr("low-medium"); - else if (AllowFree(dPriority * 100)) return tr("low"); - else if (AllowFree(dPriority * 1000)) return tr("lower"); - else return tr("lowest"); + double p = mempool.estimatePriority(i.first); + if (p > 0 && dPriority >= p) return i.second; } + // Note: if mempool hasn't accumulated enough history (estimatePriority + // returns -1) we're conservative and classify as "lowest" + return tr("lowest"); } // shows count of locked unspent outputs @@ -518,15 +521,20 @@ void CoinControlDialog::updateLabels(WalletModel *model, QDialog* dialog) // Priority dPriority = dPriorityInputs / (nBytes - nBytesInputs + (nQuantityUncompressed * 29)); // 29 = 180 - 151 (uncompressed public keys are over the limit. max 151 bytes of the input are ignored for priority) - sPriorityLabel = CoinControlDialog::getPriorityLabel(dPriority); + sPriorityLabel = CoinControlDialog::getPriorityLabel(mempool, dPriority); // Fee int64_t nFee = payTxFee.GetFee(max((unsigned int)1000, nBytes)); // Min Fee - int64_t nMinFee = GetMinFee(txDummy, nBytes, AllowFree(dPriority), GMF_SEND); + nPayFee = CWallet::GetMinimumFee(nBytes, nTxConfirmTarget, mempool); + + double dPriorityNeeded = mempool.estimatePriority(nTxConfirmTarget); + if (dPriorityNeeded <= 0) // Not enough mempool history: never send free + dPriorityNeeded = std::numeric_limits<double>::max(); - nPayFee = max(nFee, nMinFee); + if (nBytes <= MAX_FREE_TRANSACTION_CREATE_SIZE && dPriority >= dPriorityNeeded) + nPayFee = 0; if (nPayAmount > 0) { @@ -591,7 +599,7 @@ void CoinControlDialog::updateLabels(WalletModel *model, QDialog* dialog) } // turn labels "red" - l5->setStyleSheet((nBytes >= 1000) ? "color:red;" : ""); // Bytes >= 1000 + l5->setStyleSheet((nBytes >= MAX_FREE_TRANSACTION_CREATE_SIZE) ? "color:red;" : "");// Bytes >= 1000 l6->setStyleSheet((dPriority > 0 && !AllowFree(dPriority)) ? "color:red;" : ""); // Priority < "medium" l7->setStyleSheet((fDust) ? "color:red;" : ""); // Dust = "yes" @@ -732,7 +740,7 @@ void CoinControlDialog::updateView() // priority double dPriority = ((double)out.tx->vout[out.i].nValue / (nInputSize + 78)) * (out.nDepth+1); // 78 = 2 * 34 + 10 - itemOutput->setText(COLUMN_PRIORITY, CoinControlDialog::getPriorityLabel(dPriority)); + itemOutput->setText(COLUMN_PRIORITY, CoinControlDialog::getPriorityLabel(mempool, dPriority)); itemOutput->setText(COLUMN_PRIORITY_INT64, strPad(QString::number((int64_t)dPriority), 20, " ")); dPrioritySum += (double)out.tx->vout[out.i].nValue * (out.nDepth+1); nInputSum += nInputSize; @@ -765,7 +773,7 @@ void CoinControlDialog::updateView() itemWalletAddress->setText(COLUMN_CHECKBOX, "(" + QString::number(nChildren) + ")"); itemWalletAddress->setText(COLUMN_AMOUNT, BitcoinUnits::format(nDisplayUnit, nSum)); itemWalletAddress->setText(COLUMN_AMOUNT_INT64, strPad(QString::number(nSum), 15, " ")); - itemWalletAddress->setText(COLUMN_PRIORITY, CoinControlDialog::getPriorityLabel(dPrioritySum)); + itemWalletAddress->setText(COLUMN_PRIORITY, CoinControlDialog::getPriorityLabel(mempool, dPrioritySum)); itemWalletAddress->setText(COLUMN_PRIORITY_INT64, strPad(QString::number((int64_t)dPrioritySum), 20, " ")); } } diff --git a/src/qt/coincontroldialog.h b/src/qt/coincontroldialog.h index 465e2a009d..4f7422642f 100644 --- a/src/qt/coincontroldialog.h +++ b/src/qt/coincontroldialog.h @@ -19,6 +19,7 @@ namespace Ui { } class WalletModel; class CCoinControl; +class CTxMemPool; class CoinControlDialog : public QDialog { @@ -32,7 +33,7 @@ public: // static because also called from sendcoinsdialog static void updateLabels(WalletModel*, QDialog*); - static QString getPriorityLabel(double); + static QString getPriorityLabel(const CTxMemPool& pool, double); static QList<qint64> payAmounts; static CCoinControl *coinControl; diff --git a/src/wallet.cpp b/src/wallet.cpp index daca7ac04b..d9187e4be3 100644 --- a/src/wallet.cpp +++ b/src/wallet.cpp @@ -18,6 +18,7 @@ using namespace std; // Settings CFeeRate payTxFee(DEFAULT_TRANSACTION_FEE); +unsigned int nTxConfirmTarget = 1; bool bSpendZeroConfChange = true; ////////////////////////////////////////////////////////////////////////////// @@ -1273,6 +1274,7 @@ bool CWallet::CreateTransaction(const vector<pair<CScript, int64_t> >& vecSend, return false; } + wtxNew.fTimeReceivedIsTxTime = true; wtxNew.BindWallet(this); CMutableTransaction txNew; @@ -1393,19 +1395,31 @@ bool CWallet::CreateTransaction(const vector<pair<CScript, int64_t> >& vecSend, } dPriority = wtxNew.ComputePriority(dPriority, nBytes); - // Check that enough fee is included - int64_t nPayFee = payTxFee.GetFee(nBytes); - bool fAllowFree = AllowFree(dPriority); - int64_t nMinFee = GetMinFee(wtxNew, nBytes, fAllowFree, GMF_SEND); - if (nFeeRet < max(nPayFee, nMinFee)) + int64_t nFeeNeeded = GetMinimumFee(nBytes, nTxConfirmTarget, mempool); + + if (nFeeRet >= nFeeNeeded) + break; // Done, enough fee included. + + // Too big to send for free? Include more fee and try again: + if (nBytes > MAX_FREE_TRANSACTION_CREATE_SIZE) { - nFeeRet = max(nPayFee, nMinFee); + nFeeRet = nFeeNeeded; continue; } - wtxNew.fTimeReceivedIsTxTime = true; + // Not enough fee: enough priority? + double dPriorityNeeded = mempool.estimatePriority(nTxConfirmTarget); + // Not enough mempool history to estimate: use hard-coded AllowFree. + if (dPriorityNeeded <= 0 && AllowFree(dPriority)) + break; - break; + // Small enough, and priority high enough, to send for free + if (dPriority >= dPriorityNeeded) + break; + + // Include more fee and try again. + nFeeRet = nFeeNeeded; + continue; } } } @@ -1513,6 +1527,20 @@ string CWallet::SendMoneyToDestination(const CTxDestination& address, int64_t nV return SendMoney(scriptPubKey, nValue, wtxNew); } +int64_t CWallet::GetMinimumFee(unsigned int nTxBytes, unsigned int nConfirmTarget, const CTxMemPool& pool) +{ + // payTxFee is user-set "I want to pay this much" + int64_t nFeeNeeded = payTxFee.GetFee(nTxBytes); + // User didn't set: use -txconfirmtarget to estimate... + if (nFeeNeeded == 0) + nFeeNeeded = pool.estimateFee(nConfirmTarget).GetFee(nTxBytes); + // ... unless we don't have enough mempool data, in which case fall + // back to a hard-coded fee + if (nFeeNeeded == 0) + nFeeNeeded = CTransaction::minTxFee.GetFee(nTxBytes); + return nFeeNeeded; +} + diff --git a/src/wallet.h b/src/wallet.h index 1c2512d678..19a1b18523 100644 --- a/src/wallet.h +++ b/src/wallet.h @@ -25,12 +25,15 @@ // Settings extern CFeeRate payTxFee; +extern unsigned int nTxConfirmTarget; extern bool bSpendZeroConfChange; // -paytxfee default static const int64_t DEFAULT_TRANSACTION_FEE = 0; // -paytxfee will warn if called with a higher fee than this amount (in satoshis) per KB static const int nHighTransactionFeeWarning = 0.01 * COIN; +// Largest (in bytes) free transaction we're willing to create +static const unsigned int MAX_FREE_TRANSACTION_CREATE_SIZE = 1000; class CAccountingEntry; class CCoinControl; @@ -265,6 +268,8 @@ public: std::string SendMoney(CScript scriptPubKey, int64_t nValue, CWalletTx& wtxNew); std::string SendMoneyToDestination(const CTxDestination &address, int64_t nValue, CWalletTx& wtxNew); + static int64_t GetMinimumFee(unsigned int nTxBytes, unsigned int nConfirmTarget, const CTxMemPool& pool); + bool NewKeyPool(); bool TopUpKeyPool(unsigned int kpSize = 0); void ReserveKeyFromKeyPool(int64_t& nIndex, CKeyPool& keypool); |