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twister-core/src/wallet.cpp

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// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2012 The Bitcoin developers
// Distributed under the MIT/X11 software license, see the accompanying
// file license.txt or http://www.opensource.org/licenses/mit-license.php.
#include "wallet.h"
#include "walletdb.h"
#include "crypter.h"
#include "ui_interface.h"
using namespace std;
//////////////////////////////////////////////////////////////////////////////
//
// mapWallet
//
std::vector<unsigned char> CWallet::GenerateNewKey()
{
bool fCompressed = CanSupportFeature(FEATURE_COMPRPUBKEY); // default to compressed public keys if we want 0.6.0 wallets
RandAddSeedPerfmon();
CKey key;
key.MakeNewKey(fCompressed);
// Compressed public keys were introduced in version 0.6.0
if (fCompressed)
SetMinVersion(FEATURE_COMPRPUBKEY);
if (!AddKey(key))
throw std::runtime_error("CWallet::GenerateNewKey() : AddKey failed");
return key.GetPubKey();
}
bool CWallet::AddKey(const CKey& key)
{
if (!CCryptoKeyStore::AddKey(key))
return false;
if (!fFileBacked)
return true;
if (!IsCrypted())
return CWalletDB(strWalletFile).WriteKey(key.GetPubKey(), key.GetPrivKey());
return true;
}
bool CWallet::AddCryptedKey(const vector<unsigned char> &vchPubKey, const vector<unsigned char> &vchCryptedSecret)
{
if (!CCryptoKeyStore::AddCryptedKey(vchPubKey, vchCryptedSecret))
return false;
if (!fFileBacked)
return true;
{
LOCK(cs_wallet);
if (pwalletdbEncryption)
return pwalletdbEncryption->WriteCryptedKey(vchPubKey, vchCryptedSecret);
else
return CWalletDB(strWalletFile).WriteCryptedKey(vchPubKey, vchCryptedSecret);
}
return false;
}
bool CWallet::AddCScript(const CScript& redeemScript)
{
if (!CCryptoKeyStore::AddCScript(redeemScript))
return false;
if (!fFileBacked)
return true;
return CWalletDB(strWalletFile).WriteCScript(Hash160(redeemScript), redeemScript);
}
bool CWallet::Unlock(const SecureString& strWalletPassphrase)
{
if (!IsLocked())
return false;
CCrypter crypter;
CKeyingMaterial vMasterKey;
{
LOCK(cs_wallet);
BOOST_FOREACH(const MasterKeyMap::value_type& pMasterKey, mapMasterKeys)
{
if(!crypter.SetKeyFromPassphrase(strWalletPassphrase, pMasterKey.second.vchSalt, pMasterKey.second.nDeriveIterations, pMasterKey.second.nDerivationMethod))
return false;
if (!crypter.Decrypt(pMasterKey.second.vchCryptedKey, vMasterKey))
return false;
if (CCryptoKeyStore::Unlock(vMasterKey))
return true;
}
}
return false;
}
bool CWallet::ChangeWalletPassphrase(const SecureString& strOldWalletPassphrase, const SecureString& strNewWalletPassphrase)
{
bool fWasLocked = IsLocked();
{
LOCK(cs_wallet);
Lock();
CCrypter crypter;
CKeyingMaterial vMasterKey;
BOOST_FOREACH(MasterKeyMap::value_type& pMasterKey, mapMasterKeys)
{
if(!crypter.SetKeyFromPassphrase(strOldWalletPassphrase, pMasterKey.second.vchSalt, pMasterKey.second.nDeriveIterations, pMasterKey.second.nDerivationMethod))
return false;
if (!crypter.Decrypt(pMasterKey.second.vchCryptedKey, vMasterKey))
return false;
if (CCryptoKeyStore::Unlock(vMasterKey))
{
int64 nStartTime = GetTimeMillis();
crypter.SetKeyFromPassphrase(strNewWalletPassphrase, pMasterKey.second.vchSalt, pMasterKey.second.nDeriveIterations, pMasterKey.second.nDerivationMethod);
pMasterKey.second.nDeriveIterations = pMasterKey.second.nDeriveIterations * (100 / ((double)(GetTimeMillis() - nStartTime)));
nStartTime = GetTimeMillis();
crypter.SetKeyFromPassphrase(strNewWalletPassphrase, pMasterKey.second.vchSalt, pMasterKey.second.nDeriveIterations, pMasterKey.second.nDerivationMethod);
pMasterKey.second.nDeriveIterations = (pMasterKey.second.nDeriveIterations + pMasterKey.second.nDeriveIterations * 100 / ((double)(GetTimeMillis() - nStartTime))) / 2;
if (pMasterKey.second.nDeriveIterations < 25000)
pMasterKey.second.nDeriveIterations = 25000;
printf("Wallet passphrase changed to an nDeriveIterations of %i\n", pMasterKey.second.nDeriveIterations);
if (!crypter.SetKeyFromPassphrase(strNewWalletPassphrase, pMasterKey.second.vchSalt, pMasterKey.second.nDeriveIterations, pMasterKey.second.nDerivationMethod))
return false;
if (!crypter.Encrypt(vMasterKey, pMasterKey.second.vchCryptedKey))
return false;
CWalletDB(strWalletFile).WriteMasterKey(pMasterKey.first, pMasterKey.second);
if (fWasLocked)
Lock();
return true;
}
}
}
return false;
}
void CWallet::SetBestChain(const CBlockLocator& loc)
{
CWalletDB walletdb(strWalletFile);
walletdb.WriteBestBlock(loc);
}
// This class implements an addrIncoming entry that causes pre-0.4
// clients to crash on startup if reading a private-key-encrypted wallet.
class CCorruptAddress
{
public:
IMPLEMENT_SERIALIZE
(
if (nType & SER_DISK)
READWRITE(nVersion);
)
};
bool CWallet::SetMinVersion(enum WalletFeature nVersion, CWalletDB* pwalletdbIn, bool fExplicit)
{
if (nWalletVersion >= nVersion)
return true;
// when doing an explicit upgrade, if we pass the max version permitted, upgrade all the way
if (fExplicit && nVersion > nWalletMaxVersion)
nVersion = FEATURE_LATEST;
nWalletVersion = nVersion;
if (nVersion > nWalletMaxVersion)
nWalletMaxVersion = nVersion;
if (fFileBacked)
{
CWalletDB* pwalletdb = pwalletdbIn ? pwalletdbIn : new CWalletDB(strWalletFile);
if (nWalletVersion >= 40000)
{
// Versions prior to 0.4.0 did not support the "minversion" record.
// Use a CCorruptAddress to make them crash instead.
CCorruptAddress corruptAddress;
pwalletdb->WriteSetting("addrIncoming", corruptAddress);
}
if (nWalletVersion > 40000)
pwalletdb->WriteMinVersion(nWalletVersion);
if (!pwalletdbIn)
delete pwalletdb;
}
return true;
}
bool CWallet::SetMaxVersion(int nVersion)
{
// cannot downgrade below current version
if (nWalletVersion > nVersion)
return false;
nWalletMaxVersion = nVersion;
return true;
}
bool CWallet::EncryptWallet(const SecureString& strWalletPassphrase)
{
if (IsCrypted())
return false;
CKeyingMaterial vMasterKey;
RandAddSeedPerfmon();
vMasterKey.resize(WALLET_CRYPTO_KEY_SIZE);
RAND_bytes(&vMasterKey[0], WALLET_CRYPTO_KEY_SIZE);
CMasterKey kMasterKey;
RandAddSeedPerfmon();
kMasterKey.vchSalt.resize(WALLET_CRYPTO_SALT_SIZE);
RAND_bytes(&kMasterKey.vchSalt[0], WALLET_CRYPTO_SALT_SIZE);
CCrypter crypter;
int64 nStartTime = GetTimeMillis();
crypter.SetKeyFromPassphrase(strWalletPassphrase, kMasterKey.vchSalt, 25000, kMasterKey.nDerivationMethod);
kMasterKey.nDeriveIterations = 2500000 / ((double)(GetTimeMillis() - nStartTime));
nStartTime = GetTimeMillis();
crypter.SetKeyFromPassphrase(strWalletPassphrase, kMasterKey.vchSalt, kMasterKey.nDeriveIterations, kMasterKey.nDerivationMethod);
kMasterKey.nDeriveIterations = (kMasterKey.nDeriveIterations + kMasterKey.nDeriveIterations * 100 / ((double)(GetTimeMillis() - nStartTime))) / 2;
if (kMasterKey.nDeriveIterations < 25000)
kMasterKey.nDeriveIterations = 25000;
printf("Encrypting Wallet with an nDeriveIterations of %i\n", kMasterKey.nDeriveIterations);
if (!crypter.SetKeyFromPassphrase(strWalletPassphrase, kMasterKey.vchSalt, kMasterKey.nDeriveIterations, kMasterKey.nDerivationMethod))
return false;
if (!crypter.Encrypt(vMasterKey, kMasterKey.vchCryptedKey))
return false;
{
LOCK(cs_wallet);
mapMasterKeys[++nMasterKeyMaxID] = kMasterKey;
if (fFileBacked)
{
pwalletdbEncryption = new CWalletDB(strWalletFile);
pwalletdbEncryption->TxnBegin();
pwalletdbEncryption->WriteMasterKey(nMasterKeyMaxID, kMasterKey);
}
if (!EncryptKeys(vMasterKey))
{
if (fFileBacked)
pwalletdbEncryption->TxnAbort();
exit(1); //We now probably have half of our keys encrypted in memory, and half not...die and let the user reload their unencrypted wallet.
}
// Encryption was introduced in version 0.4.0
SetMinVersion(FEATURE_WALLETCRYPT, pwalletdbEncryption, true);
if (fFileBacked)
{
if (!pwalletdbEncryption->TxnCommit())
exit(1); //We now have keys encrypted in memory, but no on disk...die to avoid confusion and let the user reload their unencrypted wallet.
delete pwalletdbEncryption;
pwalletdbEncryption = NULL;
}
Lock();
Unlock(strWalletPassphrase);
NewKeyPool();
Lock();
// Need to completely rewrite the wallet file; if we don't, bdb might keep
// bits of the unencrypted private key in slack space in the database file.
CDB::Rewrite(strWalletFile);
}
return true;
}
void CWallet::WalletUpdateSpent(const CTransaction &tx)
{
// Anytime a signature is successfully verified, it's proof the outpoint is spent.
// Update the wallet spent flag if it doesn't know due to wallet.dat being
// restored from backup or the user making copies of wallet.dat.
{
LOCK(cs_wallet);
BOOST_FOREACH(const CTxIn& txin, tx.vin)
{
map<uint256, CWalletTx>::iterator mi = mapWallet.find(txin.prevout.hash);
if (mi != mapWallet.end())
{
CWalletTx& wtx = (*mi).second;
if (!wtx.IsSpent(txin.prevout.n) && IsMine(wtx.vout[txin.prevout.n]))
{
printf("WalletUpdateSpent found spent coin %sbc %s\n", FormatMoney(wtx.GetCredit()).c_str(), wtx.GetHash().ToString().c_str());
wtx.MarkSpent(txin.prevout.n);
wtx.WriteToDisk();
vWalletUpdated.push_back(txin.prevout.hash);
}
}
}
}
}
void CWallet::MarkDirty()
{
{
LOCK(cs_wallet);
BOOST_FOREACH(PAIRTYPE(const uint256, CWalletTx)& item, mapWallet)
item.second.MarkDirty();
}
}
bool CWallet::AddToWallet(const CWalletTx& wtxIn)
{
uint256 hash = wtxIn.GetHash();
{
LOCK(cs_wallet);
// Inserts only if not already there, returns tx inserted or tx found
pair<map<uint256, CWalletTx>::iterator, bool> ret = mapWallet.insert(make_pair(hash, wtxIn));
CWalletTx& wtx = (*ret.first).second;
wtx.BindWallet(this);
bool fInsertedNew = ret.second;
if (fInsertedNew)
wtx.nTimeReceived = GetAdjustedTime();
bool fUpdated = false;
if (!fInsertedNew)
{
// Merge
if (wtxIn.hashBlock != 0 && wtxIn.hashBlock != wtx.hashBlock)
{
wtx.hashBlock = wtxIn.hashBlock;
fUpdated = true;
}
if (wtxIn.nIndex != -1 && (wtxIn.vMerkleBranch != wtx.vMerkleBranch || wtxIn.nIndex != wtx.nIndex))
{
wtx.vMerkleBranch = wtxIn.vMerkleBranch;
wtx.nIndex = wtxIn.nIndex;
fUpdated = true;
}
if (wtxIn.fFromMe && wtxIn.fFromMe != wtx.fFromMe)
{
wtx.fFromMe = wtxIn.fFromMe;
fUpdated = true;
}
fUpdated |= wtx.UpdateSpent(wtxIn.vfSpent);
}
//// debug print
printf("AddToWallet %s %s%s\n", wtxIn.GetHash().ToString().substr(0,10).c_str(), (fInsertedNew ? "new" : ""), (fUpdated ? "update" : ""));
// Write to disk
if (fInsertedNew || fUpdated)
if (!wtx.WriteToDisk())
return false;
#ifndef QT_GUI
// If default receiving address gets used, replace it with a new one
CScript scriptDefaultKey;
scriptDefaultKey.SetBitcoinAddress(vchDefaultKey);
BOOST_FOREACH(const CTxOut& txout, wtx.vout)
{
if (txout.scriptPubKey == scriptDefaultKey)
{
std::vector<unsigned char> newDefaultKey;
if (GetKeyFromPool(newDefaultKey, false))
{
SetDefaultKey(newDefaultKey);
SetAddressBookName(CBitcoinAddress(vchDefaultKey), "");
}
}
}
#endif
// Notify UI
vWalletUpdated.push_back(hash);
// since AddToWallet is called directly for self-originating transactions, check for consumption of own coins
WalletUpdateSpent(wtx);
}
// Refresh UI
MainFrameRepaint();
return true;
}
// Add a transaction to the wallet, or update it.
// pblock is optional, but should be provided if the transaction is known to be in a block.
// If fUpdate is true, existing transactions will be updated.
bool CWallet::AddToWalletIfInvolvingMe(const CTransaction& tx, const CBlock* pblock, bool fUpdate, bool fFindBlock)
{
uint256 hash = tx.GetHash();
{
LOCK(cs_wallet);
bool fExisted = mapWallet.count(hash);
if (fExisted && !fUpdate) return false;
if (fExisted || IsMine(tx) || IsFromMe(tx))
{
CWalletTx wtx(this,tx);
// Get merkle branch if transaction was found in a block
if (pblock)
wtx.SetMerkleBranch(pblock);
return AddToWallet(wtx);
}
else
WalletUpdateSpent(tx);
}
return false;
}
bool CWallet::EraseFromWallet(uint256 hash)
{
if (!fFileBacked)
return false;
{
LOCK(cs_wallet);
if (mapWallet.erase(hash))
CWalletDB(strWalletFile).EraseTx(hash);
}
return true;
}
bool CWallet::IsMine(const CTxIn &txin) const
{
{
LOCK(cs_wallet);
map<uint256, CWalletTx>::const_iterator mi = mapWallet.find(txin.prevout.hash);
if (mi != mapWallet.end())
{
const CWalletTx& prev = (*mi).second;
if (txin.prevout.n < prev.vout.size())
if (IsMine(prev.vout[txin.prevout.n]))
return true;
}
}
return false;
}
int64 CWallet::GetDebit(const CTxIn &txin) const
{
{
LOCK(cs_wallet);
map<uint256, CWalletTx>::const_iterator mi = mapWallet.find(txin.prevout.hash);
if (mi != mapWallet.end())
{
const CWalletTx& prev = (*mi).second;
if (txin.prevout.n < prev.vout.size())
if (IsMine(prev.vout[txin.prevout.n]))
return prev.vout[txin.prevout.n].nValue;
}
}
return 0;
}
bool CWallet::IsChange(const CTxOut& txout) const
{
CBitcoinAddress address;
// TODO: fix handling of 'change' outputs. The assumption is that any
// payment to a TX_PUBKEYHASH that is mine but isn't in the address book
// is change. That assumption is likely to break when we implement multisignature
// wallets that return change back into a multi-signature-protected address;
// a better way of identifying which outputs are 'the send' and which are
// 'the change' will need to be implemented (maybe extend CWalletTx to remember
// which output, if any, was change).
if (ExtractAddress(txout.scriptPubKey, address) && HaveKey(address))
{
LOCK(cs_wallet);
if (!mapAddressBook.count(address))
return true;
}
return false;
}
int64 CWalletTx::GetTxTime() const
{
return nTimeReceived;
}
int CWalletTx::GetRequestCount() const
{
// Returns -1 if it wasn't being tracked
int nRequests = -1;
{
LOCK(pwallet->cs_wallet);
if (IsCoinBase())
{
// Generated block
if (hashBlock != 0)
{
map<uint256, int>::const_iterator mi = pwallet->mapRequestCount.find(hashBlock);
if (mi != pwallet->mapRequestCount.end())
nRequests = (*mi).second;
}
}
else
{
// Did anyone request this transaction?
map<uint256, int>::const_iterator mi = pwallet->mapRequestCount.find(GetHash());
if (mi != pwallet->mapRequestCount.end())
{
nRequests = (*mi).second;
// How about the block it's in?
if (nRequests == 0 && hashBlock != 0)
{
map<uint256, int>::const_iterator mi = pwallet->mapRequestCount.find(hashBlock);
if (mi != pwallet->mapRequestCount.end())
nRequests = (*mi).second;
else
nRequests = 1; // If it's in someone else's block it must have got out
}
}
}
}
return nRequests;
}
void CWalletTx::GetAmounts(int64& nGeneratedImmature, int64& nGeneratedMature, list<pair<CBitcoinAddress, int64> >& listReceived,
list<pair<CBitcoinAddress, int64> >& listSent, int64& nFee, string& strSentAccount) const
{
nGeneratedImmature = nGeneratedMature = nFee = 0;
listReceived.clear();
listSent.clear();
strSentAccount = strFromAccount;
if (IsCoinBase())
{
if (GetBlocksToMaturity() > 0)
nGeneratedImmature = pwallet->GetCredit(*this);
else
nGeneratedMature = GetCredit();
return;
}
// Compute fee:
int64 nDebit = GetDebit();
if (nDebit > 0) // debit>0 means we signed/sent this transaction
{
int64 nValueOut = GetValueOut();
nFee = nDebit - nValueOut;
}
// Sent/received.
BOOST_FOREACH(const CTxOut& txout, vout)
{
CBitcoinAddress address;
vector<unsigned char> vchPubKey;
if (!ExtractAddress(txout.scriptPubKey, address))
{
printf("CWalletTx::GetAmounts: Unknown transaction type found, txid %s\n",
this->GetHash().ToString().c_str());
address = " unknown ";
}
// Don't report 'change' txouts
if (nDebit > 0 && pwallet->IsChange(txout))
continue;
if (nDebit > 0)
listSent.push_back(make_pair(address, txout.nValue));
if (pwallet->IsMine(txout))
listReceived.push_back(make_pair(address, txout.nValue));
}
}
void CWalletTx::GetAccountAmounts(const string& strAccount, int64& nGenerated, int64& nReceived,
int64& nSent, int64& nFee) const
{
nGenerated = nReceived = nSent = nFee = 0;
int64 allGeneratedImmature, allGeneratedMature, allFee;
allGeneratedImmature = allGeneratedMature = allFee = 0;
string strSentAccount;
list<pair<CBitcoinAddress, int64> > listReceived;
list<pair<CBitcoinAddress, int64> > listSent;
GetAmounts(allGeneratedImmature, allGeneratedMature, listReceived, listSent, allFee, strSentAccount);
if (strAccount == "")
nGenerated = allGeneratedMature;
if (strAccount == strSentAccount)
{
BOOST_FOREACH(const PAIRTYPE(CBitcoinAddress,int64)& s, listSent)
nSent += s.second;
nFee = allFee;
}
{
LOCK(pwallet->cs_wallet);
BOOST_FOREACH(const PAIRTYPE(CBitcoinAddress,int64)& r, listReceived)
{
if (pwallet->mapAddressBook.count(r.first))
{
map<CBitcoinAddress, string>::const_iterator mi = pwallet->mapAddressBook.find(r.first);
if (mi != pwallet->mapAddressBook.end() && (*mi).second == strAccount)
nReceived += r.second;
}
else if (strAccount.empty())
{
nReceived += r.second;
}
}
}
}
void CWalletTx::AddSupportingTransactions(CTxDB& txdb)
{
vtxPrev.clear();
const int COPY_DEPTH = 3;
if (SetMerkleBranch() < COPY_DEPTH)
{
vector<uint256> vWorkQueue;
BOOST_FOREACH(const CTxIn& txin, vin)
vWorkQueue.push_back(txin.prevout.hash);
// This critsect is OK because txdb is already open
{
LOCK(pwallet->cs_wallet);
map<uint256, const CMerkleTx*> mapWalletPrev;
set<uint256> setAlreadyDone;
for (unsigned int i = 0; i < vWorkQueue.size(); i++)
{
uint256 hash = vWorkQueue[i];
if (setAlreadyDone.count(hash))
continue;
setAlreadyDone.insert(hash);
CMerkleTx tx;
map<uint256, CWalletTx>::const_iterator mi = pwallet->mapWallet.find(hash);
if (mi != pwallet->mapWallet.end())
{
tx = (*mi).second;
BOOST_FOREACH(const CMerkleTx& txWalletPrev, (*mi).second.vtxPrev)
mapWalletPrev[txWalletPrev.GetHash()] = &txWalletPrev;
}
else if (mapWalletPrev.count(hash))
{
tx = *mapWalletPrev[hash];
}
else if (!fClient && txdb.ReadDiskTx(hash, tx))
{
;
}
else
{
printf("ERROR: AddSupportingTransactions() : unsupported transaction\n");
continue;
}
int nDepth = tx.SetMerkleBranch();
vtxPrev.push_back(tx);
if (nDepth < COPY_DEPTH)
{
BOOST_FOREACH(const CTxIn& txin, tx.vin)
vWorkQueue.push_back(txin.prevout.hash);
}
}
}
}
reverse(vtxPrev.begin(), vtxPrev.end());
}
bool CWalletTx::WriteToDisk()
{
return CWalletDB(pwallet->strWalletFile).WriteTx(GetHash(), *this);
}
// Scan the block chain (starting in pindexStart) for transactions
// from or to us. If fUpdate is true, found transactions that already
// exist in the wallet will be updated.
int CWallet::ScanForWalletTransactions(CBlockIndex* pindexStart, bool fUpdate)
{
int ret = 0;
CBlockIndex* pindex = pindexStart;
{
LOCK(cs_wallet);
while (pindex)
{
CBlock block;
block.ReadFromDisk(pindex, true);
BOOST_FOREACH(CTransaction& tx, block.vtx)
{
if (AddToWalletIfInvolvingMe(tx, &block, fUpdate))
ret++;
}
pindex = pindex->pnext;
}
}
return ret;
}
int CWallet::ScanForWalletTransaction(const uint256& hashTx)
{
CTransaction tx;
tx.ReadFromDisk(COutPoint(hashTx, 0));
if (AddToWalletIfInvolvingMe(tx, NULL, true, true))
return 1;
return 0;
}
void CWallet::ReacceptWalletTransactions()
{
CTxDB txdb("r");
bool fRepeat = true;
while (fRepeat)
{
LOCK(cs_wallet);
fRepeat = false;
vector<CDiskTxPos> vMissingTx;
BOOST_FOREACH(PAIRTYPE(const uint256, CWalletTx)& item, mapWallet)
{
CWalletTx& wtx = item.second;
if (wtx.IsCoinBase() && wtx.IsSpent(0))
continue;
CTxIndex txindex;
bool fUpdated = false;
if (txdb.ReadTxIndex(wtx.GetHash(), txindex))
{
// Update fSpent if a tx got spent somewhere else by a copy of wallet.dat
if (txindex.vSpent.size() != wtx.vout.size())
{
printf("ERROR: ReacceptWalletTransactions() : txindex.vSpent.size() %d != wtx.vout.size() %d\n", txindex.vSpent.size(), wtx.vout.size());
continue;
}
for (unsigned int i = 0; i < txindex.vSpent.size(); i++)
{
if (wtx.IsSpent(i))
continue;
if (!txindex.vSpent[i].IsNull() && IsMine(wtx.vout[i]))
{
wtx.MarkSpent(i);
fUpdated = true;
vMissingTx.push_back(txindex.vSpent[i]);
}
}
if (fUpdated)
{
printf("ReacceptWalletTransactions found spent coin %sbc %s\n", FormatMoney(wtx.GetCredit()).c_str(), wtx.GetHash().ToString().c_str());
wtx.MarkDirty();
wtx.WriteToDisk();
}
}
else
{
// Reaccept any txes of ours that aren't already in a block
if (!wtx.IsCoinBase())
wtx.AcceptWalletTransaction(txdb, false);
}
}
if (!vMissingTx.empty())
{
// TODO: optimize this to scan just part of the block chain?
if (ScanForWalletTransactions(pindexGenesisBlock))
fRepeat = true; // Found missing transactions: re-do Reaccept.
}
}
}
void CWalletTx::RelayWalletTransaction(CTxDB& txdb)
{
BOOST_FOREACH(const CMerkleTx& tx, vtxPrev)
{
if (!tx.IsCoinBase())
{
uint256 hash = tx.GetHash();
if (!txdb.ContainsTx(hash))
RelayMessage(CInv(MSG_TX, hash), (CTransaction)tx);
}
}
if (!IsCoinBase())
{
uint256 hash = GetHash();
if (!txdb.ContainsTx(hash))
{
printf("Relaying wtx %s\n", hash.ToString().substr(0,10).c_str());
RelayMessage(CInv(MSG_TX, hash), (CTransaction)*this);
}
}
}
void CWalletTx::RelayWalletTransaction()
{
CTxDB txdb("r");
RelayWalletTransaction(txdb);
}
void CWallet::ResendWalletTransactions()
{
// Do this infrequently and randomly to avoid giving away
// that these are our transactions.
static int64 nNextTime;
if (GetTime() < nNextTime)
return;
bool fFirst = (nNextTime == 0);
nNextTime = GetTime() + GetRand(30 * 60);
if (fFirst)
return;
// Only do it if there's been a new block since last time
static int64 nLastTime;
if (nTimeBestReceived < nLastTime)
return;
nLastTime = GetTime();
// Rebroadcast any of our txes that aren't in a block yet
printf("ResendWalletTransactions()\n");
CTxDB txdb("r");
{
LOCK(cs_wallet);
// Sort them in chronological order
multimap<unsigned int, CWalletTx*> mapSorted;
BOOST_FOREACH(PAIRTYPE(const uint256, CWalletTx)& item, mapWallet)
{
CWalletTx& wtx = item.second;
// Don't rebroadcast until it's had plenty of time that
// it should have gotten in already by now.
if (nTimeBestReceived - (int64)wtx.nTimeReceived > 5 * 60)
mapSorted.insert(make_pair(wtx.nTimeReceived, &wtx));
}
BOOST_FOREACH(PAIRTYPE(const unsigned int, CWalletTx*)& item, mapSorted)
{
CWalletTx& wtx = *item.second;
wtx.RelayWalletTransaction(txdb);
}
}
}
//////////////////////////////////////////////////////////////////////////////
//
// Actions
//
int64 CWallet::GetBalance() const
{
int64 nTotal = 0;
{
LOCK(cs_wallet);
for (map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
{
const CWalletTx* pcoin = &(*it).second;
if (!pcoin->IsFinal() || !pcoin->IsConfirmed())
continue;
nTotal += pcoin->GetAvailableCredit();
}
}
return nTotal;
}
int64 CWallet::GetUnconfirmedBalance() const
{
int64 nTotal = 0;
{
LOCK(cs_wallet);
for (map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
{
const CWalletTx* pcoin = &(*it).second;
if (pcoin->IsFinal() && pcoin->IsConfirmed())
continue;
nTotal += pcoin->GetAvailableCredit();
}
}
return nTotal;
}
bool CWallet::SelectCoinsMinConf(int64 nTargetValue, int nConfMine, int nConfTheirs, set<pair<const CWalletTx*,unsigned int> >& setCoinsRet, int64& nValueRet) const
{
setCoinsRet.clear();
nValueRet = 0;
// List of values less than target
pair<int64, pair<const CWalletTx*,unsigned int> > coinLowestLarger;
coinLowestLarger.first = std::numeric_limits<int64>::max();
coinLowestLarger.second.first = NULL;
vector<pair<int64, pair<const CWalletTx*,unsigned int> > > vValue;
int64 nTotalLower = 0;
{
LOCK(cs_wallet);
vector<const CWalletTx*> vCoins;
vCoins.reserve(mapWallet.size());
for (map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
vCoins.push_back(&(*it).second);
random_shuffle(vCoins.begin(), vCoins.end(), GetRandInt);
BOOST_FOREACH(const CWalletTx* pcoin, vCoins)
{
if (!pcoin->IsFinal() || !pcoin->IsConfirmed())
continue;
if (pcoin->IsCoinBase() && pcoin->GetBlocksToMaturity() > 0)
continue;
int nDepth = pcoin->GetDepthInMainChain();
if (nDepth < (pcoin->IsFromMe() ? nConfMine : nConfTheirs))
continue;
for (unsigned int i = 0; i < pcoin->vout.size(); i++)
{
if (pcoin->IsSpent(i) || !IsMine(pcoin->vout[i]))
continue;
int64 n = pcoin->vout[i].nValue;
if (n <= 0)
continue;
pair<int64,pair<const CWalletTx*,unsigned int> > coin = make_pair(n,make_pair(pcoin,i));
if (n == nTargetValue)
{
setCoinsRet.insert(coin.second);
nValueRet += coin.first;
return true;
}
else if (n < nTargetValue + CENT)
{
vValue.push_back(coin);
nTotalLower += n;
}
else if (n < coinLowestLarger.first)
{
coinLowestLarger = coin;
}
}
}
}
if (nTotalLower == nTargetValue || nTotalLower == nTargetValue + CENT)
{
for (unsigned int i = 0; i < vValue.size(); ++i)
{
setCoinsRet.insert(vValue[i].second);
nValueRet += vValue[i].first;
}
return true;
}
if (nTotalLower < nTargetValue + (coinLowestLarger.second.first ? CENT : 0))
{
if (coinLowestLarger.second.first == NULL)
return false;
setCoinsRet.insert(coinLowestLarger.second);
nValueRet += coinLowestLarger.first;
return true;
}
if (nTotalLower >= nTargetValue + CENT)
nTargetValue += CENT;
// Solve subset sum by stochastic approximation
sort(vValue.rbegin(), vValue.rend());
vector<char> vfIncluded;
vector<char> vfBest(vValue.size(), true);
int64 nBest = nTotalLower;
for (int nRep = 0; nRep < 1000 && nBest != nTargetValue; nRep++)
{
vfIncluded.assign(vValue.size(), false);
int64 nTotal = 0;
bool fReachedTarget = false;
for (int nPass = 0; nPass < 2 && !fReachedTarget; nPass++)
{
for (unsigned int i = 0; i < vValue.size(); i++)
{
if (nPass == 0 ? rand() % 2 : !vfIncluded[i])
{
nTotal += vValue[i].first;
vfIncluded[i] = true;
if (nTotal >= nTargetValue)
{
fReachedTarget = true;
if (nTotal < nBest)
{
nBest = nTotal;
vfBest = vfIncluded;
}
nTotal -= vValue[i].first;
vfIncluded[i] = false;
}
}
}
}
}
// If the next larger is still closer, return it
if (coinLowestLarger.second.first && coinLowestLarger.first - nTargetValue <= nBest - nTargetValue)
{
setCoinsRet.insert(coinLowestLarger.second);
nValueRet += coinLowestLarger.first;
}
else {
for (unsigned int i = 0; i < vValue.size(); i++)
if (vfBest[i])
{
setCoinsRet.insert(vValue[i].second);
nValueRet += vValue[i].first;
}
//// debug print
printf("SelectCoins() best subset: ");
for (unsigned int i = 0; i < vValue.size(); i++)
if (vfBest[i])
printf("%s ", FormatMoney(vValue[i].first).c_str());
printf("total %s\n", FormatMoney(nBest).c_str());
}
return true;
}
bool CWallet::SelectCoins(int64 nTargetValue, set<pair<const CWalletTx*,unsigned int> >& setCoinsRet, int64& nValueRet) const
{
return (SelectCoinsMinConf(nTargetValue, 1, 6, setCoinsRet, nValueRet) ||
SelectCoinsMinConf(nTargetValue, 1, 1, setCoinsRet, nValueRet) ||
SelectCoinsMinConf(nTargetValue, 0, 1, setCoinsRet, nValueRet));
}
bool CWallet::CreateTransaction(const vector<pair<CScript, int64> >& vecSend, CWalletTx& wtxNew, CReserveKey& reservekey, int64& nFeeRet)
{
int64 nValue = 0;
BOOST_FOREACH (const PAIRTYPE(CScript, int64)& s, vecSend)
{
if (nValue < 0)
return false;
nValue += s.second;
}
if (vecSend.empty() || nValue < 0)
return false;
wtxNew.BindWallet(this);
{
LOCK2(cs_main, cs_wallet);
// txdb must be opened before the mapWallet lock
CTxDB txdb("r");
{
nFeeRet = nTransactionFee;
loop
{
wtxNew.vin.clear();
wtxNew.vout.clear();
wtxNew.fFromMe = true;
int64 nTotalValue = nValue + nFeeRet;
double dPriority = 0;
// vouts to the payees
BOOST_FOREACH (const PAIRTYPE(CScript, int64)& s, vecSend)
wtxNew.vout.push_back(CTxOut(s.second, s.first));
// Choose coins to use
set<pair<const CWalletTx*,unsigned int> > setCoins;
int64 nValueIn = 0;
if (!SelectCoins(nTotalValue, setCoins, nValueIn))
return false;
BOOST_FOREACH(PAIRTYPE(const CWalletTx*, unsigned int) pcoin, setCoins)
{
int64 nCredit = pcoin.first->vout[pcoin.second].nValue;
dPriority += (double)nCredit * pcoin.first->GetDepthInMainChain();
}
int64 nChange = nValueIn - nValue - nFeeRet;
// if sub-cent change is required, the fee must be raised to at least MIN_TX_FEE
// or until nChange becomes zero
// NOTE: this depends on the exact behaviour of GetMinFee
if (nFeeRet < MIN_TX_FEE && nChange > 0 && nChange < CENT)
{
int64 nMoveToFee = min(nChange, MIN_TX_FEE - nFeeRet);
nChange -= nMoveToFee;
nFeeRet += nMoveToFee;
}
if (nChange > 0)
{
// Note: We use a new key here to keep it from being obvious which side is the change.
// The drawback is that by not reusing a previous key, the change may be lost if a
// backup is restored, if the backup doesn't have the new private key for the change.
// If we reused the old key, it would be possible to add code to look for and
// rediscover unknown transactions that were written with keys of ours to recover
// post-backup change.
// Reserve a new key pair from key pool
vector<unsigned char> vchPubKey = reservekey.GetReservedKey();
// assert(mapKeys.count(vchPubKey));
// Fill a vout to ourself
// TODO: pass in scriptChange instead of reservekey so
// change transaction isn't always pay-to-bitcoin-address
CScript scriptChange;
scriptChange.SetBitcoinAddress(vchPubKey);
// 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 vin
BOOST_FOREACH(const PAIRTYPE(const CWalletTx*,unsigned int)& coin, setCoins)
wtxNew.vin.push_back(CTxIn(coin.first->GetHash(),coin.second));
// Sign
int nIn = 0;
BOOST_FOREACH(const PAIRTYPE(const CWalletTx*,unsigned int)& coin, setCoins)
if (!SignSignature(*this, *coin.first, wtxNew, nIn++))
return false;
// Limit size
unsigned int nBytes = ::GetSerializeSize(*(CTransaction*)&wtxNew, SER_NETWORK, PROTOCOL_VERSION);
if (nBytes >= MAX_BLOCK_SIZE_GEN/5)
return false;
dPriority /= nBytes;
// Check that enough fee is included
int64 nPayFee = nTransactionFee * (1 + (int64)nBytes / 1000);
bool fAllowFree = CTransaction::AllowFree(dPriority);
int64 nMinFee = wtxNew.GetMinFee(1, fAllowFree, GMF_SEND);
if (nFeeRet < max(nPayFee, nMinFee))
{
nFeeRet = max(nPayFee, nMinFee);
continue;
}
// Fill vtxPrev by copying from previous transactions vtxPrev
wtxNew.AddSupportingTransactions(txdb);
wtxNew.fTimeReceivedIsTxTime = true;
break;
}
}
}
return true;
}
bool CWallet::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 CWallet::CommitTransaction(CWalletTx& wtxNew, CReserveKey& reservekey)
{
{
LOCK2(cs_main, cs_wallet);
printf("CommitTransaction:\n%s", wtxNew.ToString().c_str());
{
// This is only to keep the database open to defeat the auto-flush for the
// duration of this scope. This is the only place where this optimization
// maybe makes sense; please don't do it anywhere else.
CWalletDB* pwalletdb = fFileBacked ? new CWalletDB(strWalletFile,"r") : NULL;
// Take key pair from key pool so it won't be used again
reservekey.KeepKey();
// Add tx to wallet, because if it has change it's also ours,
// otherwise just for transaction history.
AddToWallet(wtxNew);
// Mark old coins as spent
set<CWalletTx*> setCoins;
BOOST_FOREACH(const CTxIn& txin, wtxNew.vin)
{
CWalletTx &coin = mapWallet[txin.prevout.hash];
coin.BindWallet(this);
coin.MarkSpent(txin.prevout.n);
coin.WriteToDisk();
vWalletUpdated.push_back(coin.GetHash());
}
if (fFileBacked)
delete pwalletdb;
}
// Track how many getdata requests our transaction gets
mapRequestCount[wtxNew.GetHash()] = 0;
// Broadcast
if (!wtxNew.AcceptToMemoryPool())
{
// This must not fail. The transaction has already been signed and recorded.
printf("CommitTransaction() : Error: Transaction not valid");
return false;
}
wtxNew.RelayWalletTransaction();
}
MainFrameRepaint();
return true;
}
string CWallet::SendMoney(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, bool fAskFee)
{
CReserveKey reservekey(this);
int64 nFeeRequired;
if (IsLocked())
{
string strError = _("Error: Wallet locked, unable to create transaction ");
printf("SendMoney() : %s", strError.c_str());
return strError;
}
if (!CreateTransaction(scriptPubKey, nValue, wtxNew, reservekey, nFeeRequired))
{
string strError;
if (nValue + nFeeRequired > GetBalance())
strError = strprintf(_("Error: This transaction requires a transaction fee of at least %s because of its amount, complexity, or use of recently received funds "), FormatMoney(nFeeRequired).c_str());
else
strError = _("Error: Transaction creation failed ");
printf("SendMoney() : %s", strError.c_str());
return strError;
}
if (fAskFee && !ThreadSafeAskFee(nFeeRequired, _("Sending...")))
return "ABORTED";
if (!CommitTransaction(wtxNew, reservekey))
return _("Error: The transaction was rejected. This might happen if some of the coins in your wallet were already spent, such as if you used a copy of wallet.dat and coins were spent in the copy but not marked as spent here.");
MainFrameRepaint();
return "";
}
string CWallet::SendMoneyToBitcoinAddress(const CBitcoinAddress& address, int64 nValue, CWalletTx& wtxNew, bool fAskFee)
{
// Check amount
if (nValue <= 0)
return _("Invalid amount");
if (nValue + nTransactionFee > GetBalance())
return _("Insufficient funds");
// Parse bitcoin address
CScript scriptPubKey;
scriptPubKey.SetBitcoinAddress(address);
return SendMoney(scriptPubKey, nValue, wtxNew, fAskFee);
}
int CWallet::LoadWallet(bool& fFirstRunRet)
{
if (!fFileBacked)
return false;
fFirstRunRet = false;
int nLoadWalletRet = CWalletDB(strWalletFile,"cr+").LoadWallet(this);
if (nLoadWalletRet == DB_NEED_REWRITE)
{
if (CDB::Rewrite(strWalletFile, "\x04pool"))
{
setKeyPool.clear();
// Note: can't top-up keypool here, because wallet is locked.
// User will be prompted to unlock wallet the next operation
// the requires a new key.
}
nLoadWalletRet = DB_NEED_REWRITE;
}
if (nLoadWalletRet != DB_LOAD_OK)
return nLoadWalletRet;
fFirstRunRet = vchDefaultKey.empty();
CreateThread(ThreadFlushWalletDB, &strWalletFile);
return DB_LOAD_OK;
}
bool CWallet::SetAddressBookName(const CBitcoinAddress& address, const string& strName)
{
mapAddressBook[address] = strName;
AddressBookRepaint();
if (!fFileBacked)
return false;
return CWalletDB(strWalletFile).WriteName(address.ToString(), strName);
}
bool CWallet::DelAddressBookName(const CBitcoinAddress& address)
{
mapAddressBook.erase(address);
AddressBookRepaint();
if (!fFileBacked)
return false;
return CWalletDB(strWalletFile).EraseName(address.ToString());
}
void CWallet::PrintWallet(const CBlock& block)
{
{
LOCK(cs_wallet);
if (mapWallet.count(block.vtx[0].GetHash()))
{
CWalletTx& wtx = mapWallet[block.vtx[0].GetHash()];
printf(" mine: %d %d %d", wtx.GetDepthInMainChain(), wtx.GetBlocksToMaturity(), wtx.GetCredit());
}
}
printf("\n");
}
bool CWallet::GetTransaction(const uint256 &hashTx, CWalletTx& wtx)
{
{
LOCK(cs_wallet);
map<uint256, CWalletTx>::iterator mi = mapWallet.find(hashTx);
if (mi != mapWallet.end())
{
wtx = (*mi).second;
return true;
}
}
return false;
}
bool CWallet::SetDefaultKey(const std::vector<unsigned char> &vchPubKey)
{
if (fFileBacked)
{
if (!CWalletDB(strWalletFile).WriteDefaultKey(vchPubKey))
return false;
}
vchDefaultKey = vchPubKey;
return true;
}
bool GetWalletFile(CWallet* pwallet, string &strWalletFileOut)
{
if (!pwallet->fFileBacked)
return false;
strWalletFileOut = pwallet->strWalletFile;
return true;
}
//
// Mark old keypool keys as used,
// and generate all new keys
//
bool CWallet::NewKeyPool()
{
{
LOCK(cs_wallet);
CWalletDB walletdb(strWalletFile);
BOOST_FOREACH(int64 nIndex, setKeyPool)
walletdb.ErasePool(nIndex);
setKeyPool.clear();
if (IsLocked())
return false;
int64 nKeys = max(GetArg("-keypool", 100), (int64)0);
for (int i = 0; i < nKeys; i++)
{
int64 nIndex = i+1;
walletdb.WritePool(nIndex, CKeyPool(GenerateNewKey()));
setKeyPool.insert(nIndex);
}
printf("CWallet::NewKeyPool wrote %"PRI64d" new keys\n", nKeys);
}
return true;
}
bool CWallet::TopUpKeyPool()
{
{
LOCK(cs_wallet);
if (IsLocked())
return false;
CWalletDB walletdb(strWalletFile);
// Top up key pool
unsigned int nTargetSize = max(GetArg("-keypool", 100), 0LL);
while (setKeyPool.size() < (nTargetSize + 1))
{
int64 nEnd = 1;
if (!setKeyPool.empty())
nEnd = *(--setKeyPool.end()) + 1;
if (!walletdb.WritePool(nEnd, CKeyPool(GenerateNewKey())))
throw runtime_error("TopUpKeyPool() : writing generated key failed");
setKeyPool.insert(nEnd);
printf("keypool added key %"PRI64d", size=%d\n", nEnd, setKeyPool.size());
}
}
return true;
}
void CWallet::ReserveKeyFromKeyPool(int64& nIndex, CKeyPool& keypool)
{
nIndex = -1;
keypool.vchPubKey.clear();
{
LOCK(cs_wallet);
if (!IsLocked())
TopUpKeyPool();
// Get the oldest key
if(setKeyPool.empty())
return;
CWalletDB walletdb(strWalletFile);
nIndex = *(setKeyPool.begin());
setKeyPool.erase(setKeyPool.begin());
if (!walletdb.ReadPool(nIndex, keypool))
throw runtime_error("ReserveKeyFromKeyPool() : read failed");
if (!HaveKey(Hash160(keypool.vchPubKey)))
throw runtime_error("ReserveKeyFromKeyPool() : unknown key in key pool");
assert(!keypool.vchPubKey.empty());
printf("keypool reserve %"PRI64d"\n", nIndex);
}
}
int64 CWallet::AddReserveKey(const CKeyPool& keypool)
{
{
LOCK2(cs_main, cs_wallet);
CWalletDB walletdb(strWalletFile);
int64 nIndex = 1 + *(--setKeyPool.end());
if (!walletdb.WritePool(nIndex, keypool))
throw runtime_error("AddReserveKey() : writing added key failed");
setKeyPool.insert(nIndex);
return nIndex;
}
return -1;
}
void CWallet::KeepKey(int64 nIndex)
{
// Remove from key pool
if (fFileBacked)
{
CWalletDB walletdb(strWalletFile);
walletdb.ErasePool(nIndex);
}
printf("keypool keep %"PRI64d"\n", nIndex);
}
void CWallet::ReturnKey(int64 nIndex)
{
// Return to key pool
{
LOCK(cs_wallet);
setKeyPool.insert(nIndex);
}
printf("keypool return %"PRI64d"\n", nIndex);
}
bool CWallet::GetKeyFromPool(vector<unsigned char>& result, bool fAllowReuse)
{
int64 nIndex = 0;
CKeyPool keypool;
{
LOCK(cs_wallet);
ReserveKeyFromKeyPool(nIndex, keypool);
if (nIndex == -1)
{
if (fAllowReuse && !vchDefaultKey.empty())
{
result = vchDefaultKey;
return true;
}
if (IsLocked()) return false;
result = GenerateNewKey();
return true;
}
KeepKey(nIndex);
result = keypool.vchPubKey;
}
return true;
}
int64 CWallet::GetOldestKeyPoolTime()
{
int64 nIndex = 0;
CKeyPool keypool;
ReserveKeyFromKeyPool(nIndex, keypool);
if (nIndex == -1)
return GetTime();
ReturnKey(nIndex);
return keypool.nTime;
}
vector<unsigned char> CReserveKey::GetReservedKey()
{
if (nIndex == -1)
{
CKeyPool keypool;
pwallet->ReserveKeyFromKeyPool(nIndex, keypool);
if (nIndex != -1)
vchPubKey = keypool.vchPubKey;
else
{
printf("CReserveKey::GetReservedKey(): Warning: using default key instead of a new key, top up your keypool.");
vchPubKey = pwallet->vchDefaultKey;
}
}
assert(!vchPubKey.empty());
return vchPubKey;
}
void CReserveKey::KeepKey()
{
if (nIndex != -1)
pwallet->KeepKey(nIndex);
nIndex = -1;
vchPubKey.clear();
}
void CReserveKey::ReturnKey()
{
if (nIndex != -1)
pwallet->ReturnKey(nIndex);
nIndex = -1;
vchPubKey.clear();
}
void CWallet::GetAllReserveAddresses(set<CBitcoinAddress>& setAddress)
{
setAddress.clear();
CWalletDB walletdb(strWalletFile);
LOCK2(cs_main, cs_wallet);
BOOST_FOREACH(const int64& id, setKeyPool)
{
CKeyPool keypool;
if (!walletdb.ReadPool(id, keypool))
throw runtime_error("GetAllReserveKeyHashes() : read failed");
CBitcoinAddress address(keypool.vchPubKey);
assert(!keypool.vchPubKey.empty());
if (!HaveKey(address))
throw runtime_error("GetAllReserveKeyHashes() : unknown key in key pool");
setAddress.insert(address);
}
}