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-rw-r--r--src/miner.cpp16
-rw-r--r--src/wallet.cpp10
2 files changed, 23 insertions, 3 deletions
diff --git a/src/miner.cpp b/src/miner.cpp
index e9c1d9aff9..83684fa349 100644
--- a/src/miner.cpp
+++ b/src/miner.cpp
@@ -238,9 +238,21 @@ CBlockTemplate* CreateNewBlock(const CScript& scriptPubKeyIn)
}
if (fMissingInputs) continue;
- // Priority is sum(valuein * age) / txsize
+ // Priority is sum(valuein * age) / modified_txsize
unsigned int nTxSize = ::GetSerializeSize(tx, SER_NETWORK, PROTOCOL_VERSION);
- dPriority /= nTxSize;
+ unsigned int nTxSizeMod = nTxSize;
+ // In order to avoid disincentivizing cleaning up the UTXO set we don't count
+ // the constant overhead for each txin and up to 110 bytes of scriptSig (which
+ // is enough to cover a compressed pubkey p2sh redemption) for priority.
+ // Providing any more cleanup incentive than making additional inputs free would
+ // risk encouraging people to create junk outputs to redeem later.
+ BOOST_FOREACH(const CTxIn& txin, tx.vin)
+ {
+ unsigned int offset = 41U + min(110U, (unsigned int)txin.scriptSig.size());
+ if (nTxSizeMod > offset)
+ nTxSizeMod -= offset;
+ }
+ dPriority /= nTxSizeMod;
// This is a more accurate fee-per-kilobyte than is used by the client code, because the
// client code rounds up the size to the nearest 1K. That's good, because it gives an
diff --git a/src/wallet.cpp b/src/wallet.cpp
index 03d79406d8..6f61cfc734 100644
--- a/src/wallet.cpp
+++ b/src/wallet.cpp
@@ -1300,7 +1300,15 @@ bool CWallet::CreateTransaction(const vector<pair<CScript, int64> >& vecSend,
strFailReason = _("Transaction too large");
return false;
}
- dPriority /= nBytes;
+ unsigned int nTxSizeMod = nBytes;
+ // See miner.c's dPriority logic for the matching network-node side code.
+ BOOST_FOREACH(const CTxIn& txin, (*(CTransaction*)&wtxNew).vin)
+ {
+ unsigned int offset = 41U + min(110U, (unsigned int)txin.scriptSig.size());
+ if (nTxSizeMod > offset)
+ nTxSizeMod -= offset;
+ }
+ dPriority /= nTxSizeMod;
// Check that enough fee is included
int64 nPayFee = nTransactionFee * (1 + (int64)nBytes / 1000);