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wallet.cpp
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wallet.cpp
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// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2014 The Bitcoin developers
// Copyright (c) 2014-2015 The Dash developers
// Copyright (c) 2018-2019 The DAPScoin developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include "wallet.h"
#include "base58.h"
#include "checkpoints.h"
#include "coincontrol.h"
#include "kernel.h"
#include "masternode-budget.h"
#include "net.h"
#include "primitives/transaction.h"
#include "script/script.h"
#include "script/sign.h"
#include "spork.h"
#include "swifttx.h"
#include "timedata.h"
#include "util.h"
#include "utilmoneystr.h"
#include <assert.h>
#include "secp256k1.h"
#include <boost/algorithm/string.hpp>
#include <boost/algorithm/string/replace.hpp>
#include <boost/thread.hpp>
#include <boost/filesystem/operations.hpp>
#include "ecdhutil.h"
#include "txdb.h"
#include "secp256k1_bulletproofs.h"
#include "secp256k1_commitment.h"
#include "secp256k1_generator.h"
using namespace std;
/**
* Settings
*/
CFeeRate payTxFee(DEFAULT_TRANSACTION_FEE);
CAmount maxTxFee = DEFAULT_TRANSACTION_MAXFEE;
unsigned int nTxConfirmTarget = 1;
bool bSpendZeroConfChange = true;
bool bdisableSystemnotifications = false; // Those bubbles can be annoying and slow down the UI when you get lots of trx
bool fSendFreeTransactions = false;
bool fPayAtLeastCustomFee = true;
#include "uint256.h"
//Elliptic Curve Diffie Helman: encodes and decodes the amount b and mask a
void ecdhEncode(unsigned char * unmasked, unsigned char* amount, const unsigned char * sharedSec, int size)
{
uint256 sharedSec1 = Hash(sharedSec, sharedSec + size);
uint256 sharedSec2 = Hash(sharedSec1.begin(), sharedSec1.end());
for (int i = 0;i < 32; i++) {
unmasked[i] ^= *(sharedSec1.begin() + i);
}
unsigned char temp[32];
memcpy(temp, amount, 32);
for (int i = 0;i < 32; i++) {
amount[i] = temp[i%8]^*(sharedSec2.begin() + i);
}
}
void ecdhDecode(unsigned char * masked, unsigned char * amount, const unsigned char * sharedSec, int size)
{
uint256 sharedSec1 = Hash(sharedSec, sharedSec + size);
uint256 sharedSec2 = Hash(sharedSec1.begin(), sharedSec1.end());
for (int i = 0;i < 32; i++) {
masked[i] ^= *(sharedSec1.begin() + i);
}
unsigned char temp[32];
memcpy(temp, amount, 32);
memset(amount, 0, 8);
for (int i = 0;i < 32; i++) {
amount[i] = temp[i%8]^*(sharedSec2.begin() + i);
}
}
void ECDHInfo::ComputeSharedSec(const CKey& priv, const CPubKey& pubKey, CPubKey& sharedSec) {
sharedSec.Set(pubKey.begin(), pubKey.end());
unsigned char temp[65];
memcpy(temp, sharedSec.begin(), sharedSec.size());
if (!secp256k1_ec_pubkey_tweak_mul(temp, sharedSec.size(), priv.begin()))
throw runtime_error("Cannot compute EC multiplication: secp256k1_ec_pubkey_tweak_mul");
sharedSec.Set(temp, temp + 33);
}
void ECDHInfo::Encode(const CKey& mask, const CAmount& amount, const CPubKey& sharedSec, uint256& encodedMask, uint256& encodedAmount)
{
memcpy(encodedMask.begin(), mask.begin(), 32);
memcpy(encodedAmount.begin(), &amount, 32);
ecdhEncode(encodedMask.begin(), encodedAmount.begin(), sharedSec.begin(), sharedSec.size());
}
void ECDHInfo::Decode(unsigned char* encodedMask, unsigned char* encodedAmount, const CPubKey& sharedSec, CKey& decodedMask, CAmount& decodedAmount)
{
unsigned char tempAmount[32], tempDecoded[32];
memcpy(tempDecoded, encodedMask, 32);
decodedMask.Set(tempDecoded, tempDecoded + 32, 32);
memcpy(tempAmount, encodedAmount, 32);
memcpy(tempDecoded, decodedMask.begin(), 32);
ecdhDecode(tempDecoded, tempAmount, sharedSec.begin(), sharedSec.size());
memcpy(&decodedAmount, tempAmount, 8);
decodedMask.Set(tempDecoded, tempDecoded + 32, true);
memcpy(&decodedAmount, tempAmount, 8);
}
/**
* Fees smaller than this (in duffs) are considered zero fee (for transaction creation)
* We are ~100 times smaller then bitcoin now (2015-06-23), set minTxFee 10 times higher
* so it's still 10 times lower comparing to bitcoin.
* Override with -mintxfee
*/
CFeeRate CWallet::minTxFee = CFeeRate(10000);
int64_t nStartupTime = GetAdjustedTime();
/** @defgroup mapWallet
*
* @{
*/
struct CompareValueOnly {
bool operator()(const pair<CAmount, pair<const CWalletTx*, unsigned int> >& t1,
const pair<CAmount, pair<const CWalletTx*, unsigned int> >& t2) const
{
return t1.first < t2.first;
}
};
std::string COutput::ToString() const
{
return strprintf("COutput(%s, %d, %d) [%s]", tx->GetHash().ToString(), i, nDepth, FormatMoney(tx->vout[i].nValue));
}
const CWalletTx* CWallet::GetWalletTx(const uint256& hash) const
{
LOCK(cs_wallet);
std::map<uint256, CWalletTx>::const_iterator it = mapWallet.find(hash);
if (it == mapWallet.end())
return NULL;
return &(it->second);
}
CPubKey CWallet::GenerateNewKey()
{
AssertLockHeld(cs_wallet); // mapKeyMetadata
bool fCompressed = CanSupportFeature(FEATURE_COMPRPUBKEY); // default to compressed public keys if we want 0.6.0 wallets
RandAddSeedPerfmon();
CKey secret;
secret.MakeNewKey(fCompressed);
// Compressed public keys were introduced in version 0.6.0
if (fCompressed)
SetMinVersion(FEATURE_COMPRPUBKEY);
CPubKey pubkey = secret.GetPubKey();
assert(secret.VerifyPubKey(pubkey));
// Create new metadata
int64_t nCreationTime = GetTime();
mapKeyMetadata[pubkey.GetID()] = CKeyMetadata(nCreationTime);
if (!nTimeFirstKey || nCreationTime < nTimeFirstKey)
nTimeFirstKey = nCreationTime;
if (!AddKeyPubKey(secret, pubkey))
throw std::runtime_error("CWallet::GenerateNewKey() : AddKey failed");
return pubkey;
}
bool CWallet::AddKeyPubKey(const CKey& secret, const CPubKey& pubkey)
{
AssertLockHeld(cs_wallet); // mapKeyMetadata
if (!CCryptoKeyStore::AddKeyPubKey(secret, pubkey))
return false;
// check if we need to remove from watch-only
CScript script;
script = GetScriptForDestination(pubkey);
if (HaveWatchOnly(script))
RemoveWatchOnly(script);
if (!fFileBacked)
return true;
if (!IsCrypted()) {
return CWalletDB(strWalletFile).WriteKey(pubkey, secret.GetPrivKey(), mapKeyMetadata[pubkey.GetID()]);
}
return true;
}
bool CWallet::WriteStakingStatus(bool status)
{
walletStakingInProgress = true;
return CWalletDB(strWalletFile).WriteStakingStatus(status);
}
bool CWallet::ReadStakingStatus()
{
return CWalletDB(strWalletFile).ReadStakingStatus();
}
bool CWallet::AddCryptedKey(const CPubKey& 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,
mapKeyMetadata[vchPubKey.GetID()]);
else
return CWalletDB(strWalletFile).WriteCryptedKey(vchPubKey, vchCryptedSecret, mapKeyMetadata[vchPubKey.GetID()]);
}
return false;
}
bool CWallet::LoadKeyMetadata(const CPubKey& pubkey, const CKeyMetadata& meta)
{
AssertLockHeld(cs_wallet); // mapKeyMetadata
if (meta.nCreateTime && (!nTimeFirstKey || meta.nCreateTime < nTimeFirstKey))
nTimeFirstKey = meta.nCreateTime;
mapKeyMetadata[pubkey.GetID()] = meta;
return true;
}
bool CWallet::LoadCryptedKey(const CPubKey& vchPubKey, const std::vector<unsigned char>& vchCryptedSecret)
{
return CCryptoKeyStore::AddCryptedKey(vchPubKey, vchCryptedSecret);
}
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::LoadCScript(const CScript& redeemScript)
{
/* A sanity check was added in pull #3843 to avoid adding redeemScripts
* that never can be redeemed. However, old wallets may still contain
* these. Do not add them to the wallet and warn. */
if (redeemScript.size() > MAX_SCRIPT_ELEMENT_SIZE) {
std::string strAddr = CBitcoinAddress(CScriptID(redeemScript)).ToString();
LogPrintf("%s: Warning: This wallet contains a redeemScript of size %i which exceeds maximum size %i thus can never be redeemed. Do not use address %s.\n",
__func__, redeemScript.size(), MAX_SCRIPT_ELEMENT_SIZE, strAddr);
return true;
}
return CCryptoKeyStore::AddCScript(redeemScript);
}
bool CWallet::AddWatchOnly(const CScript& dest)
{
if (!CCryptoKeyStore::AddWatchOnly(dest))
return false;
nTimeFirstKey = 1; // No birthday information for watch-only keys.
NotifyWatchonlyChanged(true);
if (!fFileBacked)
return true;
return CWalletDB(strWalletFile).WriteWatchOnly(dest);
}
bool CWallet::RemoveWatchOnly(const CScript& dest)
{
AssertLockHeld(cs_wallet);
if (!CCryptoKeyStore::RemoveWatchOnly(dest))
return false;
if (!HaveWatchOnly())
NotifyWatchonlyChanged(false);
if (fFileBacked)
if (!CWalletDB(strWalletFile).EraseWatchOnly(dest))
return false;
return true;
}
bool CWallet::LoadWatchOnly(const CScript& dest)
{
return CCryptoKeyStore::AddWatchOnly(dest);
}
bool CWallet::AddMultiSig(const CScript& dest)
{
if (!CCryptoKeyStore::AddMultiSig(dest))
return false;
nTimeFirstKey = 1; // No birthday information
NotifyMultiSigChanged(true);
if (!fFileBacked)
return true;
return CWalletDB(strWalletFile).WriteMultiSig(dest);
}
bool CWallet::RemoveMultiSig(const CScript& dest)
{
AssertLockHeld(cs_wallet);
if (!CCryptoKeyStore::RemoveMultiSig(dest))
return false;
if (!HaveMultiSig())
NotifyMultiSigChanged(false);
if (fFileBacked)
if (!CWalletDB(strWalletFile).EraseMultiSig(dest))
return false;
return true;
}
bool CWallet::LoadMultiSig(const CScript& dest)
{
return CCryptoKeyStore::AddMultiSig(dest);
}
bool CWallet::RescanAfterUnlock(bool fromBeginning) {
if (IsLocked()) {
return false;
}
if (fImporting || fReindex) {
return false;
}
//rescan from scanned position stored in database
int scannedHeight = 0;
CWalletDB(strWalletFile).ReadScannedBlockHeight(scannedHeight);
if (fromBeginning) scannedHeight = 0;
CBlockIndex* pindex;
if (scannedHeight > chainActive.Height() || scannedHeight == 0) {
pindex = chainActive.Genesis();
} else {
pindex = chainActive[scannedHeight];
}
ScanForWalletTransactions(pindex, true);
return true;
}
bool CWallet::Unlock(const SecureString& strWalletPassphrase, bool anonymizeOnly)
{
SecureString strWalletPassphraseFinal;
if (!IsLocked()) {
fWalletUnlockAnonymizeOnly = anonymizeOnly;
return true;
}
strWalletPassphraseFinal = strWalletPassphrase;
CCrypter crypter;
CKeyingMaterial vMasterKey;
{
LOCK(cs_wallet);
BOOST_FOREACH (const MasterKeyMap::value_type& pMasterKey, mapMasterKeys) {
if (!crypter.SetKeyFromPassphrase(strWalletPassphraseFinal, pMasterKey.second.vchSalt, pMasterKey.second.nDeriveIterations, pMasterKey.second.nDerivationMethod))
return false;
if (!crypter.Decrypt(pMasterKey.second.vchCryptedKey, vMasterKey))
continue; // try another master key
if (CCryptoKeyStore::Unlock(vMasterKey)) {
fWalletUnlockAnonymizeOnly = anonymizeOnly;
LogPrintf("\nStart rescaning wallet transactions");
pwalletMain->RescanAfterUnlock();
LogPrintf("\nFinish rescaning wallet transactions");
return true;
}
}
}
return false;
}
bool CWallet::ChangeWalletPassphrase(const SecureString& strOldWalletPassphrase, const SecureString& strNewWalletPassphrase)
{
bool fWasLocked = IsLocked();
SecureString strOldWalletPassphraseFinal = strOldWalletPassphrase;
{
LOCK(cs_wallet);
Lock();
CCrypter crypter;
CKeyingMaterial vMasterKey;
BOOST_FOREACH (MasterKeyMap::value_type& pMasterKey, mapMasterKeys) {
if (!crypter.SetKeyFromPassphrase(strOldWalletPassphraseFinal, 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_t 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;
LogPrintf("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();
pwalletMain->RescanAfterUnlock();
return true;
}
}
}
return false;
}
void CWallet::SetBestChain(const CBlockLocator& loc)
{
CWalletDB walletdb(strWalletFile);
walletdb.WriteBestBlock(loc);
}
bool CWallet::SetMinVersion(enum WalletFeature nVersion, CWalletDB* pwalletdbIn, bool fExplicit)
{
LOCK(cs_wallet); // nWalletVersion
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)
pwalletdb->WriteMinVersion(nWalletVersion);
if (!pwalletdbIn)
delete pwalletdb;
}
return true;
}
bool CWallet::SetMaxVersion(int nVersion)
{
LOCK(cs_wallet); // nWalletVersion, nWalletMaxVersion
// cannot downgrade below current version
if (nWalletVersion > nVersion)
return false;
nWalletMaxVersion = nVersion;
return true;
}
set<uint256> CWallet::GetConflicts(const uint256& txid) const
{
set<uint256> result;
AssertLockHeld(cs_wallet);
std::map<uint256, CWalletTx>::const_iterator it = mapWallet.find(txid);
if (it == mapWallet.end())
return result;
const CWalletTx& wtx = it->second;
std::pair<TxSpends::const_iterator, TxSpends::const_iterator> range;
BOOST_FOREACH (const CTxIn& txin, wtx.vin) {
COutPoint prevout = findMyOutPoint(txin);
if (mapTxSpends.count(prevout) <= 1)
continue; // No conflict if zero or one spends
range = mapTxSpends.equal_range(prevout);
for (TxSpends::const_iterator it = range.first; it != range.second; ++it)
result.insert(it->second);
}
return result;
}
void CWallet::SyncMetaData(pair<TxSpends::iterator, TxSpends::iterator> range)
{
// We want all the wallet transactions in range to have the same metadata as
// the oldest (smallest nOrderPos).
// So: find smallest nOrderPos:
int nMinOrderPos = std::numeric_limits<int>::max();
const CWalletTx* copyFrom = NULL;
for (TxSpends::iterator it = range.first; it != range.second; ++it) {
const uint256& hash = it->second;
int n = mapWallet[hash].nOrderPos;
if (n < nMinOrderPos) {
nMinOrderPos = n;
copyFrom = &mapWallet[hash];
}
}
// Now copy data from copyFrom to rest:
for (TxSpends::iterator it = range.first; it != range.second; ++it) {
const uint256& hash = it->second;
CWalletTx* copyTo = &mapWallet[hash];
if (copyFrom == copyTo) continue;
copyTo->mapValue = copyFrom->mapValue;
copyTo->vOrderForm = copyFrom->vOrderForm;
// fTimeReceivedIsTxTime not copied on purpose
// nTimeReceived not copied on purpose
copyTo->nTimeSmart = copyFrom->nTimeSmart;
copyTo->fFromMe = copyFrom->fFromMe;
copyTo->strFromAccount = copyFrom->strFromAccount;
// nOrderPos not copied on purpose
// cached members not copied on purpose
}
}
/**
* Outpoint is spent if any non-conflicted transaction
* spends it:
*/
bool CWallet::IsSpent(const uint256& hash, unsigned int n)
{
const COutPoint outpoint(hash, n);
std::string keyImageHex;
pair<TxSpends::const_iterator, TxSpends::const_iterator> range;
range = mapTxSpends.equal_range(outpoint);
for (TxSpends::const_iterator it = range.first; it != range.second; ++it) {
const uint256& wtxid = it->second;
std::map<uint256, CWalletTx>::const_iterator mit = mapWallet.find(wtxid);
if (mit != mapWallet.end() && int(mit->second.GetDepthInMainChain()) > int(0)) {
keyImagesSpends[keyImageHex] = true;
return true; // Spent
}
}
std::string outString = outpoint.hash.GetHex() + std::to_string(outpoint.n);
CKeyImage ki = outpointToKeyImages[outString];
if (IsKeyImageSpend1(ki.GetHex(), uint256())) {
return true;
}
return false;
}
void CWallet::AddToSpends(const COutPoint& outpoint, const uint256& wtxid)
{
mapTxSpends.insert(make_pair(outpoint, wtxid));
pair<TxSpends::iterator, TxSpends::iterator> range;
range = mapTxSpends.equal_range(outpoint);
SyncMetaData(range);
inSpendQueueOutpoints.erase(outpoint);
}
void CWallet::AddToSpends(const uint256& wtxid)
{
assert(mapWallet.count(wtxid));
CWalletTx& thisTx = mapWallet[wtxid];
if (thisTx.IsCoinBase()) // Coinbases don't spend anything!
return;
BOOST_FOREACH (const CTxIn& txin, thisTx.vin) {
CKeyImage ki = txin.keyImage;
COutPoint prevout = findMyOutPoint(txin);
if (!prevout.IsNull() && isMatchMyKeyImage(ki, prevout)) {
AddToSpends(prevout, wtxid);
continue;
}
}
}
bool CWallet::isMatchMyKeyImage(const CKeyImage& ki, const COutPoint& out)
{
if (mapWallet.count(out.hash) == 0) return false;
std::string outpoint = out.hash.GetHex() + std::to_string(out.n);
CKeyImage computed = outpointToKeyImages[outpoint];
bool ret = (computed == ki);
return ret;
}
bool CWallet::GetMasternodeVinAndKeys(CTxIn& txinRet, CPubKey& pubKeyRet, CKey& keyRet, std::string strTxHash, std::string strOutputIndex)
{
// wait for reindex and/or import to finish
if (fImporting || fReindex) return false;
// Find possible candidates
std::vector<COutput> vPossibleCoins;
AvailableCoins(vPossibleCoins, true, NULL, false, ONLY_1000000);
if (vPossibleCoins.empty()) {
LogPrintf("CWallet::GetMasternodeVinAndKeys -- Could not locate any valid masternode vin\n");
return false;
}
if (strTxHash.empty()) // No output specified, select the first one
return GetVinAndKeysFromOutput(vPossibleCoins[0], txinRet, pubKeyRet, keyRet);
// Find specific vin
uint256 txHash = uint256S(strTxHash);
int nOutputIndex;
try {
nOutputIndex = std::stoi(strOutputIndex.c_str());
} catch (const std::exception& e) {
LogPrintf("%s: %s on strOutputIndex\n", __func__, e.what());
return false;
}
BOOST_FOREACH (COutput& out, vPossibleCoins)
if (out.tx->GetHash() == txHash && out.i == nOutputIndex) // found it!
return GetVinAndKeysFromOutput(out, txinRet, pubKeyRet, keyRet);
LogPrintf("CWallet::GetMasternodeVinAndKeys -- Could not locate specified masternode vin\n");
return false;
}
bool CWallet::GetVinAndKeysFromOutput(COutput out, CTxIn& txinRet, CPubKey& pubKeyRet, CKey& keyRet)
{
// wait for reindex and/or import to finish
if (fImporting || fReindex) return false;
CScript pubScript;
txinRet = CTxIn(out.tx->GetHash(), out.i);
pubScript = out.tx->vout[out.i].scriptPubKey; // the inputs PubKey
CTxDestination address1;
ExtractDestination(pubScript, address1);
CBitcoinAddress address2(address1);
CKeyID keyID;
if (!address2.GetKeyID(keyID)) {
LogPrintf("CWallet::GetVinAndKeysFromOutput -- Address does not refer to a key\n");
return false;
}
if (!GetKey(keyID, keyRet)) {
LogPrintf("CWallet::GetVinAndKeysFromOutput -- Private key for address is not known\n");
return false;
}
pubKeyRet = keyRet.GetPubKey();
return true;
}
bool CWallet::EncryptWallet(const SecureString& strWalletPassphrase)
{
if (IsCrypted())
return false;
CKeyingMaterial vMasterKey;
RandAddSeedPerfmon();
vMasterKey.resize(WALLET_CRYPTO_KEY_SIZE);
GetRandBytes(&vMasterKey[0], WALLET_CRYPTO_KEY_SIZE);
CMasterKey kMasterKey;
RandAddSeedPerfmon();
kMasterKey.vchSalt.resize(WALLET_CRYPTO_SALT_SIZE);
GetRandBytes(&kMasterKey.vchSalt[0], WALLET_CRYPTO_SALT_SIZE);
CCrypter crypter;
int64_t 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;
LogPrintf("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) {
assert(!pwalletdbEncryption);
pwalletdbEncryption = new CWalletDB(strWalletFile);
if (!pwalletdbEncryption->TxnBegin()) {
delete pwalletdbEncryption;
pwalletdbEncryption = NULL;
return false;
}
pwalletdbEncryption->WriteMasterKey(nMasterKeyMaxID, kMasterKey);
}
if (!EncryptKeys(vMasterKey)) {
if (fFileBacked) {
pwalletdbEncryption->TxnAbort();
delete pwalletdbEncryption;
}
// We now probably have half of our keys encrypted in memory, and half not...
// die and let the user reload their unencrypted wallet.
assert(false);
}
// Encryption was introduced in version 0.4.0
SetMinVersion(FEATURE_WALLETCRYPT, pwalletdbEncryption, true);
if (fFileBacked) {
if (!pwalletdbEncryption->TxnCommit()) {
delete pwalletdbEncryption;
// We now have keys encrypted in memory, but not on disk...
// die to avoid confusion and let the user reload their unencrypted wallet.
assert(false);
}
delete pwalletdbEncryption;
pwalletdbEncryption = NULL;
}
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);
}
NotifyStatusChanged(this);
return true;
}
int64_t CWallet::IncOrderPosNext(CWalletDB* pwalletdb)
{
AssertLockHeld(cs_wallet); // nOrderPosNext
int64_t nRet = nOrderPosNext++;
if (pwalletdb) {
pwalletdb->WriteOrderPosNext(nOrderPosNext);
} else {
CWalletDB(strWalletFile).WriteOrderPosNext(nOrderPosNext);
}
return nRet;
}
CWallet::TxItems CWallet::OrderedTxItems(std::list<CAccountingEntry>& acentries, std::string strAccount)
{
AssertLockHeld(cs_wallet); // mapWallet
CWalletDB walletdb(strWalletFile);
// First: get all CWalletTx and CAccountingEntry into a sorted-by-order multimap.
TxItems txOrdered;
// Note: maintaining indices in the database of (account,time) --> txid and (account, time) --> acentry
// would make this much faster for applications that do this a lot.
for (map<uint256, CWalletTx>::iterator it = mapWallet.begin(); it != mapWallet.end(); ++it) {
CWalletTx* wtx = &((*it).second);
txOrdered.insert(make_pair(wtx->nOrderPos, TxPair(wtx, (CAccountingEntry*)0)));
}
acentries.clear();
walletdb.ListAccountCreditDebit(strAccount, acentries);
BOOST_FOREACH (CAccountingEntry& entry, acentries) {
txOrdered.insert(make_pair(entry.nOrderPos, TxPair((CWalletTx*)0, &entry)));
}
return txOrdered;
}
void CWallet::MarkDirty()
{
{
LOCK(cs_wallet);
BOOST_FOREACH (PAIRTYPE(const uint256, CWalletTx) & item, mapWallet)
item.second.MarkDirty();
}
}
bool CWallet::AddToWallet(const CWalletTx& wtxIn, bool fFromLoadWallet)
{
uint256 hash = wtxIn.GetHash();
const uint256& hashBlock = wtxIn.hashBlock;
CBlockIndex* p = mapBlockIndex[hashBlock];
if (p) {
for (CTxIn in: wtxIn.vin) {
pblocktree->WriteKeyImage(in.keyImage.GetHex(), hashBlock);
}
}
CWalletDB db(strWalletFile);
for (size_t i = 0; i < wtxIn.vout.size(); i++) {
std::string outpoint = hash.GetHex() + std::to_string(i);
if (outpointToKeyImages.count(outpoint) == 1 && outpointToKeyImages[outpoint].IsValid()) continue;
CKeyImage ki;
//reading key image
if (db.ReadKeyImage(outpoint, ki)) {
if (ki.IsFullyValid()) {
outpointToKeyImages[outpoint] = ki;
continue;
}
}
if (IsMine(wtxIn.vout[i])) {
if (generateKeyImage(wtxIn.vout[i].scriptPubKey, ki)) {
outpointToKeyImages[outpoint] = ki;
db.WriteKeyImage(outpoint, ki);
}
}
}
if (fFromLoadWallet) {
mapWallet[hash] = wtxIn;
mapWallet[hash].BindWallet(this);
AddToSpends(hash);
} else {
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();
wtx.nOrderPos = IncOrderPosNext();
wtx.nTimeSmart = wtx.nTimeReceived;
if (wtxIn.hashBlock != 0) {
if (mapBlockIndex.count(wtxIn.hashBlock)) {
int64_t latestNow = wtx.nTimeReceived;
int64_t latestEntry = 0;
{
// Tolerate times up to the last timestamp in the wallet not more than 5 minutes into the future
int64_t latestTolerated = latestNow + 300;
std::list<CAccountingEntry> acentries;
TxItems txOrdered = OrderedTxItems(acentries);
for (TxItems::reverse_iterator it = txOrdered.rbegin(); it != txOrdered.rend(); ++it) {
CWalletTx* const pwtx = (*it).second.first;
if (pwtx == &wtx)
continue;
CAccountingEntry* const pacentry = (*it).second.second;
int64_t nSmartTime;
if (pwtx) {
nSmartTime = pwtx->nTimeSmart;
if (!nSmartTime)
nSmartTime = pwtx->nTimeReceived;
} else
nSmartTime = pacentry->nTime;
if (nSmartTime <= latestTolerated) {
latestEntry = nSmartTime;
if (nSmartTime > latestNow)
latestNow = nSmartTime;
break;
}
}
}
int64_t blocktime = mapBlockIndex[wtxIn.hashBlock]->GetBlockTime();
wtx.nTimeSmart = std::max(latestEntry, std::min(blocktime, latestNow));
} else
LogPrintf("AddToWallet() : found %s in block %s not in index\n",
wtxIn.GetHash().ToString(),
wtxIn.hashBlock.ToString());
}
AddToSpends(hash);
}
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;
}
}
//// debug print
LogPrintf("AddToWallet %s %s%s\n", wtxIn.GetHash().ToString(), (fInsertedNew ? "new" : ""), (fUpdated ? "update" : ""));
// Write to disk
if (fInsertedNew || fUpdated)
if (!wtx.WriteToDisk())
return false;
// Break debit/credit balance caches:
wtx.MarkDirty();
LogPrintf("MarkDirty %s %s%s\n", wtxIn.GetHash().ToString(), (fInsertedNew ? "new" : ""), (fUpdated ? "update" : ""));
// Notify UI of new or updated transaction
NotifyTransactionChanged(this, hash, fInsertedNew ? CT_NEW : CT_UPDATED);
// notify an external script when a wallet transaction comes in or is updated
std::string strCmd = GetArg("-walletnotify", "");
if (!strCmd.empty()) {
boost::replace_all(strCmd, "%s", wtxIn.GetHash().GetHex());
boost::thread t(runCommand, strCmd); // thread runs free
}
}
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)
{
{
AssertLockHeld(cs_wallet);
bool fExisted = mapWallet.count(tx.GetHash()) != 0;
if (fExisted && !fUpdate) return false;
IsTransactionForMe(tx);
if (pblock && mapBlockIndex.count(pblock->GetHash()) == 1) {
if (!IsLocked()) {
try {
CWalletDB(strWalletFile).WriteScannedBlockHeight(mapBlockIndex[pblock->GetHash()]->nHeight);
} catch (std::exception &e) {
LogPrintf("\nCannot open data base or wallet is locked\n");
}
}
}
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);
}
}
return false;
}
void CWallet::SyncTransaction(const CTransaction& tx, const CBlock* pblock)
{
LOCK2(cs_main, cs_wallet);
if (!AddToWalletIfInvolvingMe(tx, pblock, true)) {
return; // Not one of ours
}
// If a transaction changes 'conflicted' state, that changes the balance
// available of the outputs it spends. So force those to be
// recomputed, also:
BOOST_FOREACH (const CTxIn& txin, tx.vin) {
COutPoint prevout = findMyOutPoint(txin);
if (mapWallet.count(prevout.hash))
mapWallet[prevout.hash].MarkDirty();
}
}
void CWallet::EraseFromWallet(const uint256& hash)
{
if (!fFileBacked)
return;
{
LOCK(cs_wallet);
if (mapWallet.erase(hash))
CWalletDB(strWalletFile).EraseTx(hash);
}
return;
}
isminetype CWallet::IsMine(const CTxIn& txin) const
{
{
LOCK(cs_wallet);
COutPoint prevout = findMyOutPoint(txin);
map<uint256, CWalletTx>::const_iterator mi = mapWallet.find(prevout.hash);
if (mi != mapWallet.end()) {
const CWalletTx& prev = (*mi).second;
if (prevout.n < prev.vout.size())
return IsMine(prev.vout[prevout.n]);
}
}
return ISMINE_NO;
}
COutPoint CWallet::findMyOutPoint(const CTxIn& txin) const
{
std::string prevout = txin.prevout.hash.GetHex() + std::to_string(txin.prevout.n);
if (outpointToKeyImages.count(prevout) == 1 && outpointToKeyImages[prevout] == txin.keyImage) return txin.prevout;