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sendmany RPC command, to send to multiple recipients in one transaction.

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This commit is contained in:
Gavin Andresen
2010-12-16 15:48:04 -05:00
parent f4f2987273
commit b931ed8563
3 changed files with 106 additions and 16 deletions
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48
main.cpp
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@@ -678,7 +678,11 @@ bool CTransaction::AcceptToMemoryPool(CTxDB& txdb, bool fCheckInputs, bool* pfMi
// Safety limits
unsigned int nSize = ::GetSerializeSize(*this, SER_NETWORK);
if (GetSigOpCount() > 2 || nSize < 100)
// Checking ECDSA signatures is a CPU bottleneck, so to avoid denial-of-service
// attacks disallow transactions with more than one SigOp per 34 bytes.
// 34 bytes because a TxOut is:
// 20-byte address + 8 byte bitcoin amount + 5 bytes of ops + 1 byte script length
if (GetSigOpCount() > nSize / 34 || nSize < 100)
return error("AcceptToMemoryPool() : nonstandard transaction");
// Rather not work on nonstandard transactions
@@ -3846,8 +3850,18 @@ bool SelectCoins(int64 nTargetValue, set<CWalletTx*>& setCoinsRet)
bool CreateTransaction(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, CReserveKey& reservekey, int64& nFeeRet)
bool CreateTransaction(const vector<pair<CScript, int64> >& vecSend, CWalletTx& wtxNew, CReserveKey& reservekey, int64& nFeeRet)
{
int64 nValue = 0;
foreach (const PAIRTYPE(CScript, int64)& s, vecSend)
{
if (nValue < 0)
return false;
nValue += s.second;
}
if (vecSend.empty() || nValue < 0)
return false;
CRITICAL_BLOCK(cs_main)
{
// txdb must be opened before the mapWallet lock
@@ -3860,11 +3874,12 @@ bool CreateTransaction(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, CR
wtxNew.vin.clear();
wtxNew.vout.clear();
wtxNew.fFromMe = true;
if (nValue < 0)
return false;
int64 nValueOut = nValue;
int64 nTotalValue = nValue + nFeeRet;
double dPriority = 0;
// vouts to the payees
foreach (const PAIRTYPE(CScript, int64)& s, vecSend)
wtxNew.vout.push_back(CTxOut(s.second, s.first));
// Choose coins to use
set<CWalletTx*> setCoins;
@@ -3878,11 +3893,6 @@ bool CreateTransaction(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, CR
dPriority += (double)nCredit * pcoin->GetDepthInMainChain();
}
// Fill a vout to the payee
bool fChangeFirst = GetRand(2);
if (!fChangeFirst)
wtxNew.vout.push_back(CTxOut(nValueOut, scriptPubKey));
// Fill a vout back to self with any change
int64 nChange = nValueIn - nTotalValue;
if (nChange >= CENT)
@@ -3900,19 +3910,18 @@ bool CreateTransaction(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, CR
// Fill a vout to ourself, using same address type as the payment
CScript scriptChange;
if (scriptPubKey.GetBitcoinAddressHash160() != 0)
if (vecSend[0].first.GetBitcoinAddressHash160() != 0)
scriptChange.SetBitcoinAddress(vchPubKey);
else
scriptChange << vchPubKey << OP_CHECKSIG;
wtxNew.vout.push_back(CTxOut(nChange, scriptChange));
// Insert change txn at random position:
vector<CTxOut>::iterator position = wtxNew.vout.begin()+GetRandInt(wtxNew.vout.size());
wtxNew.vout.insert(position, CTxOut(nChange, scriptChange));
}
else
reservekey.ReturnKey();
// Fill a vout to the payee
if (fChangeFirst)
wtxNew.vout.push_back(CTxOut(nValueOut, scriptPubKey));
// Fill vin
foreach(CWalletTx* pcoin, setCoins)
for (int nOut = 0; nOut < pcoin->vout.size(); nOut++)
@@ -3954,6 +3963,13 @@ bool CreateTransaction(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, CR
return true;
}
bool CreateTransaction(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, CReserveKey& reservekey, int64& nFeeRet)
{
vector< pair<CScript, int64> > vecSend;
vecSend.push_back(make_pair(scriptPubKey, nValue));
return CreateTransaction(vecSend, wtxNew, reservekey, nFeeRet);
}
// Call after CreateTransaction unless you want to abort
bool CommitTransaction(CWalletTx& wtxNew, CReserveKey& reservekey)
{