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Merge pull request #267 from sipa/mintxrelay

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Separate required fee for relaying and creation
This commit is contained in:
Pieter Wuille 2011-05-26 13:33:51 -07:00
commit 3d962315f2
2 changed files with 13 additions and 10 deletions
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6
src/main.cpp
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@ -731,13 +731,13 @@ bool CTransaction::AcceptToMemoryPool(CTxDB& txdb, bool fCheckInputs, bool* pfMi
} }
// Don't accept it if it can't get into a block // Don't accept it if it can't get into a block
if (nFees < GetMinFee(1000)) if (nFees < GetMinFee(1000, false, true))
return error("AcceptToMemoryPool() : not enough fees"); return error("AcceptToMemoryPool() : not enough fees");
// Continuously rate-limit free transactions // Continuously rate-limit free transactions
// This mitigates 'penny-flooding' -- sending thousands of free transactions just to // This mitigates 'penny-flooding' -- sending thousands of free transactions just to
// be annoying or make other's transactions take longer to confirm. // be annoying or make other's transactions take longer to confirm.
if (nFees < MIN_TX_FEE) if (nFees < MIN_RELAY_TX_FEE)
{ {
static CCriticalSection cs; static CCriticalSection cs;
static double dFreeCount; static double dFreeCount;
@ -3329,7 +3329,7 @@ CBlock* CreateNewBlock(CReserveKey& reservekey)
// Transaction fee required depends on block size // Transaction fee required depends on block size
bool fAllowFree = (nBlockSize + nTxSize < 4000 || CTransaction::AllowFree(dPriority)); bool fAllowFree = (nBlockSize + nTxSize < 4000 || CTransaction::AllowFree(dPriority));
int64 nMinFee = tx.GetMinFee(nBlockSize, fAllowFree); int64 nMinFee = tx.GetMinFee(nBlockSize, fAllowFree, true);
// Connecting shouldn't fail due to dependency on other memory pool transactions // Connecting shouldn't fail due to dependency on other memory pool transactions
// because we're already processing them in order of dependency // because we're already processing them in order of dependency

17
src/main.h
View File

@ -29,7 +29,8 @@ static const unsigned int MAX_BLOCK_SIZE_GEN = MAX_BLOCK_SIZE/2;
static const int MAX_BLOCK_SIGOPS = MAX_BLOCK_SIZE/50; static const int MAX_BLOCK_SIGOPS = MAX_BLOCK_SIZE/50;
static const int64 COIN = 100000000; static const int64 COIN = 100000000;
static const int64 CENT = 1000000; static const int64 CENT = 1000000;
static const int64 MIN_TX_FEE = 50000; static const int64 MIN_TX_FEE = CENT;
static const int64 MIN_RELAY_TX_FEE = 50000;
static const int64 MAX_MONEY = 21000000 * COIN; static const int64 MAX_MONEY = 21000000 * COIN;
inline bool MoneyRange(int64 nValue) { return (nValue >= 0 && nValue <= MAX_MONEY); } inline bool MoneyRange(int64 nValue) { return (nValue >= 0 && nValue <= MAX_MONEY); }
static const int COINBASE_MATURITY = 100; static const int COINBASE_MATURITY = 100;
@ -599,12 +600,14 @@ public:
return dPriority > COIN * 144 / 250; return dPriority > COIN * 144 / 250;
} }
int64 GetMinFee(unsigned int nBlockSize=1, bool fAllowFree=true) const int64 GetMinFee(unsigned int nBlockSize=1, bool fAllowFree=true, bool fForRelay=false) const
{ {
// Base fee is 1 cent per kilobyte // Base fee is either MIN_TX_FEE or MIN_RELAY_TX_FEE
int64 nBaseFee = fForRelay ? MIN_RELAY_TX_FEE : MIN_TX_FEE;
unsigned int nBytes = ::GetSerializeSize(*this, SER_NETWORK); unsigned int nBytes = ::GetSerializeSize(*this, SER_NETWORK);
unsigned int nNewBlockSize = nBlockSize + nBytes; unsigned int nNewBlockSize = nBlockSize + nBytes;
int64 nMinFee = (1 + (int64)nBytes / 1000) * MIN_TX_FEE; int64 nMinFee = (1 + (int64)nBytes / 1000) * nBaseFee;
if (fAllowFree) if (fAllowFree)
{ {
@ -623,11 +626,11 @@ public:
} }
} }
// To limit dust spam, require MIN_TX_FEE if any output is less than 0.01 // To limit dust spam, require MIN_TX_FEE/MIN_RELAY_TX_FEE if any output is less than 0.01
if (nMinFee < MIN_TX_FEE) if (nMinFee < nBaseFee)
BOOST_FOREACH(const CTxOut& txout, vout) BOOST_FOREACH(const CTxOut& txout, vout)
if (txout.nValue < CENT) if (txout.nValue < CENT)
nMinFee = MIN_TX_FEE; nMinFee = nBaseFee;
// Raise the price as the block approaches full // Raise the price as the block approaches full
if (nBlockSize != 1 && nNewBlockSize >= MAX_BLOCK_SIZE_GEN/2) if (nBlockSize != 1 && nNewBlockSize >= MAX_BLOCK_SIZE_GEN/2)