zcash-hackworks
/
bitcoin
mirror of https://github.com/zcash-hackworks/bitcoin.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

Make sure rate-limiting code is thread-safe

This commit is contained in:
Gavin Andresen 2011-03-13 14:38:07 -04:00
parent 5de8b54c51
commit 88abf70386
1 changed files with 17 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
main.cpp
View File

@ -739,11 +739,17 @@ bool CTransaction::AcceptToMemoryPool(CTxDB& txdb, bool fCheckInputs, bool* pfMi
return error("AcceptToMemoryPool() : not enough fees");
// Continuously rate-limit free transactions
// This mitigates 'penny-flooding' -- sending thousands of free transactions just to
// be annoying or make other's transactions take longer to confirm.
if (nFees < CENT)
{
static CCriticalSection cs;
static double dFreeCount;
static int64 nLastTime;
int64 nNow = GetTime();
CRITICAL_BLOCK(cs)
{
// Use an exponentially decaying ~10-minute window:
dFreeCount *= pow(1.0 - 1.0/600.0, (double)(nNow - nLastTime));
nLastTime = nNow;
@ -756,6 +762,7 @@ bool CTransaction::AcceptToMemoryPool(CTxDB& txdb, bool fCheckInputs, bool* pfMi
dFreeCount += nSize;
}
}
}
// Store transaction in memory
CRITICAL_BLOCK(cs_mapTransactions)