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fix transaction fee bug in CreateTransaction, higher size cutoff for free transactions in GetMinFee

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s_nakamoto 2009-12-06 00:29:09 +00:00
parent 70918a6645
commit 658b5b414a
3 changed files with 17 additions and 14 deletions
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18
main.cpp
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@ -2479,10 +2479,8 @@ void BitcoinMiner()
if (tx.IsCoinBase() || !tx.IsFinal()) if (tx.IsCoinBase() || !tx.IsFinal())
continue; continue;
// Transaction fee requirements, mainly only needed for flood control // Transaction fee based on block size
// Under 10K (about 80 inputs) is free for first 100 transactions int64 nMinFee = tx.GetMinFee(nBlockSize);
// Base rate is 0.01 per KB
int64 nMinFee = tx.GetMinFee(pblock->vtx.size() < 100);
map<uint256, CTxIndex> mapTestPoolTmp(mapTestPool); map<uint256, CTxIndex> mapTestPoolTmp(mapTestPool);
if (!tx.ConnectInputs(txdb, mapTestPoolTmp, CDiskTxPos(1,1,1), 0, nFees, false, true, nMinFee)) if (!tx.ConnectInputs(txdb, mapTestPoolTmp, CDiskTxPos(1,1,1), 0, nFees, false, true, nMinFee))
@ -2768,11 +2766,11 @@ bool CreateTransaction(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, CK
if (nValue < 0) if (nValue < 0)
return false; return false;
int64 nValueOut = nValue; int64 nValueOut = nValue;
nValue += nFee; int64 nTotalValue = nValue + nFee;
// Choose coins to use // Choose coins to use
set<CWalletTx*> setCoins; set<CWalletTx*> setCoins;
if (!SelectCoins(nValue, setCoins)) if (!SelectCoins(nTotalValue, setCoins))
return false; return false;
int64 nValueIn = 0; int64 nValueIn = 0;
foreach(CWalletTx* pcoin, setCoins) foreach(CWalletTx* pcoin, setCoins)
@ -2784,7 +2782,7 @@ bool CreateTransaction(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, CK
wtxNew.vout.push_back(CTxOut(nValueOut, scriptPubKey)); wtxNew.vout.push_back(CTxOut(nValueOut, scriptPubKey));
// Fill a vout back to self with any change // Fill a vout back to self with any change
if (nValueIn > nValue) if (nValueIn > nTotalValue)
{ {
// New private key // New private key
if (keyRet.IsNull()) if (keyRet.IsNull())
@ -2793,7 +2791,7 @@ bool CreateTransaction(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, CK
// Fill a vout to ourself // Fill a vout to ourself
CScript scriptPubKey; CScript scriptPubKey;
scriptPubKey << keyRet.GetPubKey() << OP_CHECKSIG; scriptPubKey << keyRet.GetPubKey() << OP_CHECKSIG;
wtxNew.vout.push_back(CTxOut(nValueIn - nValue, scriptPubKey)); wtxNew.vout.push_back(CTxOut(nValueIn - nTotalValue, scriptPubKey));
} }
// Fill a vout to the payee // Fill a vout to the payee
@ -2814,9 +2812,9 @@ bool CreateTransaction(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, CK
SignSignature(*pcoin, wtxNew, nIn++); SignSignature(*pcoin, wtxNew, nIn++);
// Check that enough fee is included // Check that enough fee is included
if (nFee < wtxNew.GetMinFee(true)) if (nFee < wtxNew.GetMinFee())
{ {
nFee = nFeeRequiredRet = wtxNew.GetMinFee(true); nFee = nFeeRequiredRet = wtxNew.GetMinFee();
continue; continue;
} }

11
main.h
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@ -512,14 +512,19 @@ public:
return nValueOut; return nValueOut;
} }
int64 GetMinFee(bool fDiscount=false) const int64 GetMinFee(unsigned int nBlockSize=1) const
{ {
// Base fee is 1 cent per kilobyte // Base fee is 1 cent per kilobyte
unsigned int nBytes = ::GetSerializeSize(*this, SER_NETWORK); unsigned int nBytes = ::GetSerializeSize(*this, SER_NETWORK);
int64 nMinFee = (1 + (int64)nBytes / 1000) * CENT; int64 nMinFee = (1 + (int64)nBytes / 1000) * CENT;
// First 100 transactions in a block are free // Transactions under 60K are free as long as block size is under 80K
if (fDiscount && nBytes < 10000) // (about 27,000bc if made of 50bc inputs)
if (nBytes < 60000 && nBlockSize < 80000)
nMinFee = 0;
// Transactions under 3K are free as long as block size is under 200K
if (nBytes < 3000 && nBlockSize < 200000)
nMinFee = 0; nMinFee = 0;
// To limit dust spam, require a 0.01 fee if any output is less than 0.01 // To limit dust spam, require a 0.01 fee if any output is less than 0.01

2
serialize.h
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@ -20,7 +20,7 @@ class CDataStream;
class CAutoFile; class CAutoFile;
static const int VERSION = 106; static const int VERSION = 106;
static const char* pszSubVer = " linux-test9"; static const char* pszSubVer = " test10";