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require some minimal priority for free transactions to slow down transaction spam

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git-svn-id: https://bitcoin.svn.sourceforge.net/svnroot/bitcoin/trunk@185 1a98c847-1fd6-4fd8-948a-caf3550aa51b
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s_nakamoto
2010-11-19 23:37:05 +00:00
parent 683bcb9154
commit f35e21e2e4
3 changed files with 16 additions and 11 deletions
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19
main.h
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@@ -528,21 +528,24 @@ public:
return nValueOut;
}
int64 GetMinFee(unsigned int nBlockSize=1) const
int64 GetMinFee(unsigned int nBlockSize=1, bool fAllowFree=true) const
{
// Base fee is 1 cent per kilobyte
unsigned int nBytes = ::GetSerializeSize(*this, SER_NETWORK);
unsigned int nNewBlockSize = nBlockSize + nBytes;
int64 nMinFee = (1 + (int64)nBytes / 1000) * CENT;
// Transactions under 25K are free as long as block size is under 40K
// (about 11,000bc if made of 50bc inputs)
if (nBytes < 25000 && nNewBlockSize < 40000)
nMinFee = 0;
if (fAllowFree)
{
// Transactions under 25K are free as long as block size is under 40K
// (about 11,000bc if made of 50bc inputs)
if (nBytes < 25000 && nNewBlockSize < 40000)
nMinFee = 0;
// Transactions under 3K are free as long as block size is under 50K
if (nBytes < 3000 && nNewBlockSize < 50000)
nMinFee = 0;
// Transactions under 3K are free as long as block size is under 50K
if (nBytes < 3000 && nNewBlockSize < 50000)
nMinFee = 0;
}
// To limit dust spam, require a 0.01 fee if any output is less than 0.01
if (nMinFee < CENT)