text: // Copyright (c) 2009-2010 Satoshi Nakamoto
  // Copyright (c) 2009-2012 The Bitcoin developers
  // Distributed under the MIT/X11 software license, see the accompanying
  // file COPYING or http://www.opensource.org/licenses/mit-license.php.
  
  #include "txdb.h"
  #include "wallet.h"
  #include "walletdb.h"
  #include "crypter.h"
  #include "ui_interface.h"
  #include "base58.h"
  #include "kernel.h"
  #include "coincontrol.h"
  #include "miner.h"
  #include <boost/algorithm/string/replace.hpp>
  #include <openssl/bio.h>
  
  #include "main.h"
  
  bool CWallet::fWalletUnlockMintOnly = false;
  
  struct CompareValueOnly
  {
      bool operator()(const std::pair<int64_t, std::pair<const CWalletTx *, unsigned int> > &t1, const std::pair<int64_t, std::pair<const CWalletTx *, unsigned int> > &t2) const {
          return t1.first < t2.first;
      }
  };
  
  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()
  {
      bool fCompressed = CanSupportFeature(FEATURE_COMPRPUBKEY); // default to compressed public keys if we want 0.6.0 wallets
  
      seed::RandAddSeedPerfmon();
      CKey key;
      key.MakeNewKey(fCompressed);
  
      // Compressed public keys were introduced in version 0.6.0
      if (fCompressed) {
          SetMinVersion(FEATURE_COMPRPUBKEY);
      }
  
      CPubKey pubkey = key.GetPubKey();
  
      // Create new metadata, Add to Wallet
      int64_t nCreationTime = bitsystem::GetTime();
      mapKeyMetadata[CBitcoinAddress(pubkey.GetID())] = CKeyMetadata(nCreationTime);
  
      if (!nTimeFirstKey || nCreationTime < nTimeFirstKey) {
          nTimeFirstKey = nCreationTime;
      }
  
      if (! AddKey(key)) {
          throw std::runtime_error("CWallet::GenerateNewKey() : AddKey failed");
      }
      
      return key.GetPubKey();
  }
  
  CMalleableKeyView CWallet::GenerateNewMalleableKey()
  {
      seed::RandAddSeedPerfmon();
  
      // Compressed public keys were introduced in version 0.6.0
      SetMinVersion(FEATURE_MALLKEY);
  
      CMalleableKey mKey;
      mKey.MakeNewKeys();
      const CMalleableKeyView &keyView(mKey);
  
      // Create new metadata, Add to Wallet
      int64_t nCreationTime = bitsystem::GetTime();
      mapKeyMetadata[CBitcoinAddress(keyView.GetMalleablePubKey())] = CKeyMetadata(nCreationTime);
  
      if (!nTimeFirstKey || nCreationTime < nTimeFirstKey) {
          nTimeFirstKey = nCreationTime;
      }
  
      if (! AddKey(mKey)) {
          throw std::runtime_error("CWallet::GenerateNewMalleableKey() : AddKey failed");
      }
  
      return CMalleableKeyView(mKey);
  }
  
  bool CWallet::AddKey(const CKey &key)
  {
      CPubKey pubkey = key.GetPubKey();
      if (! CCryptoKeyStore::AddKey(key)) {
          return false;
      }
      if (! fFileBacked) {
          return true;
      }
      if (! IsCrypted()) {
          return CWalletDB(strWalletFile).WriteKey(pubkey, key.GetPrivKey(), mapKeyMetadata[CBitcoinAddress(pubkey.GetID())]);
      }
  
      return true;
  }
  
  bool CWallet::AddKey(const CMalleableKey &mKey)
  {
      CMalleableKeyView keyView = CMalleableKeyView(mKey);
      CSecret vchSecretH = mKey.GetSecretH();
      if (! CCryptoKeyStore::AddMalleableKey(keyView, vchSecretH)) {
          return false;
      }
      if (! fFileBacked) {
          return true;
      }
      if (! IsCrypted()) {
          return CWalletDB(strWalletFile).WriteMalleableKey(keyView, vchSecretH, mapKeyMetadata[CBitcoinAddress(keyView.GetMalleablePubKey())]);
      }
  
      return true;
  }
  
  bool CWallet::AddCryptedMalleableKey(const CMalleableKeyView &keyView, const std::vector<unsigned char> &vchCryptedSecretH)
  {
      if (! CCryptoKeyStore::AddCryptedMalleableKey(keyView, vchCryptedSecretH)) {
          return false;
      }
      if (! fFileBacked) {
          return true;
      }
      {
          LOCK(cs_wallet);
          CBitcoinAddress addr(keyView.GetMalleablePubKey());
          if (pwalletdbEncryption) {
              return pwalletdbEncryption->WriteCryptedMalleableKey(keyView, vchCryptedSecretH, mapKeyMetadata[addr]);
          } else {
              return CWalletDB(strWalletFile).WriteCryptedMalleableKey(keyView, vchCryptedSecretH, mapKeyMetadata[addr]);
          }
      }
  
      return true;
  }
  
  bool CWallet::AddCryptedKey(const CPubKey &vchPubKey, const std::vector<unsigned char> &vchCryptedSecret)
  {
      if (! CCryptoKeyStore::AddCryptedKey(vchPubKey, vchCryptedSecret)) {
          return false;
      }
  
      // check if we need to remove from watch-only
      CScript script;
      script.SetDestination(vchPubKey.GetID());
      if (HaveWatchOnly(script)) {
          RemoveWatchOnly(script);
      }
  
      if (! fFileBacked) {
          return true;
      }
      {
          LOCK(cs_wallet);
          CBitcoinAddress addr(vchPubKey.GetID());
          if (pwalletdbEncryption) {
              return pwalletdbEncryption->WriteCryptedKey(vchPubKey, vchCryptedSecret, mapKeyMetadata[addr]);
          } else {
              return CWalletDB(strWalletFile).WriteCryptedKey(vchPubKey, vchCryptedSecret, mapKeyMetadata[addr]);
          }
      }
  
      return false;
  }
  
  bool CWallet::LoadKeyMetadata(const CPubKey &pubkey, const CKeyMetadata &meta)
  {
      if (meta.nCreateTime && (!nTimeFirstKey || meta.nCreateTime < nTimeFirstKey)) {
          nTimeFirstKey = meta.nCreateTime;
      }
  
      mapKeyMetadata[CBitcoinAddress(pubkey.GetID())] = meta;
      return true;
  }
  
  bool CWallet::LoadKeyMetadata(const CMalleableKeyView &keyView, const CKeyMetadata &metadata)
  {
      if (metadata.nCreateTime && (!nTimeFirstKey || metadata.nCreateTime < nTimeFirstKey)) {
          nTimeFirstKey = metadata.nCreateTime;
      }
  
      mapKeyMetadata[CBitcoinAddress(keyView.GetMalleablePubKey())] = metadata;
      return true;
  }
  
  bool CWallet::AddCScript(const CScript &redeemScript)
  {
      if (! CCryptoKeyStore::AddCScript(redeemScript)) {
          return false;
      }
      if (! fFileBacked) {
          return true;
      }
      return CWalletDB(strWalletFile).WriteCScript(hash_basis::Hash160(redeemScript), redeemScript);
  }
  
  bool CWallet::LoadCScript(const CScript &redeemScript)
  {
      /* A sanity check was added in commit 5ed0a2b 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() > Script_param::MAX_SCRIPT_ELEMENT_SIZE) {
          std::string strAddr = CBitcoinAddress(redeemScript.GetID()).ToString();
          printf("LoadCScript() : Warning: This wallet contains a redeemScript of size %" PRIszu " which exceeds maximum size %i thus can never be redeemed. Do not use address %s.\n", redeemScript.size(), Script_param::MAX_SCRIPT_ELEMENT_SIZE, strAddr.c_str());
          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)
  {
      LOCK(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::Unlock(const SecureString &strWalletPassphrase)
  {
      if (! IsLocked()) {
          return false;
      }
  
      CCrypter crypter;
      CKeyingMaterial vMasterKey;
      {
          LOCK(cs_wallet);
          BOOST_FOREACH(const MasterKeyMap::value_type &pMasterKey, this->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_t nStartTime = util::GetTimeMillis();
                  crypter.SetKeyFromPassphrase(strNewWalletPassphrase, pMasterKey.second.vchSalt, pMasterKey.second.nDeriveIterations, pMasterKey.second.nDerivationMethod);
                  double nFirstMultiplier = 1e2 / (util::GetTimeMillis() - nStartTime);
                  pMasterKey.second.nDeriveIterations = (uint32_t)(pMasterKey.second.nDeriveIterations *nFirstMultiplier);
  
                  nStartTime = util::GetTimeMillis();
                  crypter.SetKeyFromPassphrase(strNewWalletPassphrase, pMasterKey.second.vchSalt, pMasterKey.second.nDeriveIterations, pMasterKey.second.nDerivationMethod);
                  double nSecondMultiplier = 1e2 / (util::GetTimeMillis() - nStartTime);
                  pMasterKey.second.nDeriveIterations = (uint32_t)((pMasterKey.second.nDeriveIterations + pMasterKey.second.nDeriveIterations * nSecondMultiplier) / 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
  {
  private:
      CCorruptAddress(const CCorruptAddress &); // {}
      CCorruptAddress &operator=(const CCorruptAddress &); // {}
  
  public:
      IMPLEMENT_SERIALIZE
      (
          if (nType & SER_DISK) {
              READWRITE(nVersion);
          }
      )
  };
  
  bool CWallet::SetMinVersion(enum WalletFeature nVersion, CWalletDB *pwalletdbIn/* =NULL */, bool fExplicit/* =false */)
  {
      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) {
          if (nWalletVersion > (int)FEATURE_WALLETCRYPT) {
              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;
      seed::RandAddSeedPerfmon();
  
      vMasterKey.resize(crypter_param::WALLET_CRYPTO_KEY_SIZE);
      RAND_bytes(&vMasterKey[0], crypter_param::WALLET_CRYPTO_KEY_SIZE);
  
      CMasterKey kMasterKey;
  
      seed::RandAddSeedPerfmon();
      kMasterKey.vchSalt.resize(crypter_param::WALLET_CRYPTO_SALT_SIZE);
      RAND_bytes(&kMasterKey.vchSalt[0], crypter_param::WALLET_CRYPTO_SALT_SIZE);
  
      CCrypter crypter;
      int64_t nStartTime = util::GetTimeMillis();
      crypter.SetKeyFromPassphrase(strWalletPassphrase, kMasterKey.vchSalt, 25000, kMasterKey.nDerivationMethod);
  
      int64_t nDivider = util::GetTimeMillis() - nStartTime;
      kMasterKey.nDeriveIterations = (uint32_t)(25e5 / (double)(nDivider));
  
      nStartTime = util::GetTimeMillis();
      crypter.SetKeyFromPassphrase(strWalletPassphrase, kMasterKey.vchSalt, kMasterKey.nDeriveIterations, kMasterKey.nDerivationMethod);
  
      double nMultiplier = 1e2 / (util::GetTimeMillis() - nStartTime);
      kMasterKey.nDeriveIterations = (uint32_t)((kMasterKey.nDeriveIterations + kMasterKey.nDeriveIterations * nMultiplier) / 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(std::nothrow) CWalletDB(strWalletFile);
              if(! pwalletdbEncryption) {
                  printf("Encrypting Wallet, memory allocate failure.\n");
                  return false;
              }
              if (! pwalletdbEncryption->TxnBegin()) {
                  return false;
              }
              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);
  
      }
      NotifyStatusChanged(this);
  
      return true;
  }
  
  bool CWallet::DecryptWallet(const SecureString &strWalletPassphrase)
  {
      if (! IsCrypted()) {
          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 false;
              }
          }
  
          if (fFileBacked) {
              pwalletdbDecryption = new(std::nothrow) CWalletDB(strWalletFile);
              if(! pwalletdbDecryption) {
                  printf("Decrypting Wallet, memory allocate failure.\n");
                  return false;
              }
              if(! pwalletdbDecryption->TxnBegin()) {
                  return false;
              }
          }
  
          if (! DecryptKeys(vMasterKey)) {
              if (fFileBacked) {
                  pwalletdbDecryption->TxnAbort();
              }
              exit(1); //We now probably have half of our keys decrypted in memory, and half not...die and let the user reload their encrypted wallet.
          }
  
          if (fFileBacked) {
              // Overwrite crypted keys
              KeyMap::const_iterator mi = mapKeys.begin();
              while (mi != mapKeys.end())
              {
                  CKey key;
                  key.SetSecret((*mi).second.first, (*mi).second.second);
                  pwalletdbDecryption->EraseCryptedKey(key.GetPubKey());
                  pwalletdbDecryption->WriteKey(key.GetPubKey(), key.GetPrivKey(), mapKeyMetadata[CBitcoinAddress(mi->first)]);
                  mi++;
              }
  
              MalleableKeyMap::const_iterator mi2 = mapMalleableKeys.begin();
              while (mi2 != mapMalleableKeys.end())
              {
                  const CSecret &vchSecretH = mi2->second;
                  const CMalleableKeyView &keyView = mi2->first;
                  pwalletdbDecryption->EraseCryptedMalleableKey(keyView);
                  pwalletdbDecryption->WriteMalleableKey(keyView, vchSecretH, mapKeyMetadata[CBitcoinAddress(keyView.GetMalleablePubKey())]);
                  mi2++;
              }
  
              // Erase master keys
              MasterKeyMap::const_iterator mk = mapMasterKeys.begin();
              while (mk != mapMasterKeys.end())
              {
                  pwalletdbDecryption->EraseMasterKey((*mk).first);
                  mk++;
              }
  
              if (! pwalletdbDecryption->TxnCommit()) {
                  exit(1); //We now have keys decrypted in memory, but no on disk...die to avoid confusion and let the user reload their encrypted wallet.
              }
  
              delete pwalletdbDecryption;
              pwalletdbDecryption = NULL;
          }
  
          // Need to completely rewrite the wallet file; if we don't, bdb might keep
          // encrypted private keys in the database file which can be a reason of consistency issues.
          CDB::Rewrite(strWalletFile);
      }
      NotifyStatusChanged(this);
  
      return true;
  }
  
  bool CWallet::GetPEM(const CKeyID &keyID, const std::string &fileName, const SecureString &strPassKey) const
  {
      BIO *pemOut = BIO_new_file(fileName.c_str(), "w");
      if (pemOut == NULL) {
          return print::error("GetPEM() : failed to create file %s\n", fileName.c_str());
      }
  
      CKey key;
      if (! GetKey(keyID, key)) {
          return print::error("GetPEM() : failed to get key for address=%s\n", CBitcoinAddress(keyID).ToString().c_str());
      }
  
      bool result = key.WritePEM(pemOut, strPassKey);
      BIO_free(pemOut);
      return result;
  }
  
  int64_t CWallet::IncOrderPosNext(CWalletDB *pwalletdb)
  {
      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)
  {
      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 (std::map<uint256, CWalletTx>::iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
      {
          CWalletTx* wtx = &((*it).second);
          txOrdered.insert(std::make_pair(wtx->nOrderPos, TxPair(wtx, (CAccountingEntry*)0)));
      }
  
      acentries.clear();
      walletdb.ListAccountCreditDebit(strAccount, acentries);
      BOOST_FOREACH(CAccountingEntry &entry, acentries)
      {
          txOrdered.insert(std::make_pair(entry.nOrderPos, TxPair((CWalletTx *)0, &entry)));
      }
  
      return txOrdered;
  }
  
  void CWallet::WalletUpdateSpent(const CTransaction &tx, bool fBlock)
  {
      //
      // 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)
          {
              std::map<uint256, CWalletTx>::iterator mi = mapWallet.find(txin.prevout.hash);
              if (mi != mapWallet.end()) {
                  CWalletTx &wtx = (*mi).second;
                  if (txin.prevout.n >= wtx.vout.size()) {
                      printf("WalletUpdateSpent: bad wtx %s\n", wtx.GetHash().ToString().c_str());
                  } else if (!wtx.IsSpent(txin.prevout.n) && IsMine(wtx.vout[txin.prevout.n])) {
                      printf("WalletUpdateSpent found spent %s %ssora %s\n", coin_param::strCoinName.c_str(), bitstr::FormatMoney(wtx.GetCredit(MINE_ALL)).c_str(), wtx.GetHash().ToString().c_str());
                      wtx.MarkSpent(txin.prevout.n);
                      wtx.WriteToDisk();
                      NotifyTransactionChanged(this, txin.prevout.hash, CT_UPDATED);
                      vMintingWalletUpdated.push_back(txin.prevout.hash);
                  }
              }
          }
  
          if (fBlock) {
              uint256 hash = tx.GetHash();
              std::map<uint256, CWalletTx>::iterator mi = mapWallet.find(hash);
              CWalletTx &wtx = (*mi).second;
  
              BOOST_FOREACH(const CTxOut &txout, tx.vout)
              {
                  if (IsMine(txout)) {
                      wtx.MarkUnspent(&txout - &tx.vout[0]);
                      wtx.WriteToDisk();
                      NotifyTransactionChanged(this, hash, CT_UPDATED);
                      vMintingWalletUpdated.push_back(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
          //
          std::pair<std::map<uint256, CWalletTx>::iterator, bool> ret = mapWallet.insert(std::make_pair(hash, wtxIn));
          CWalletTx &wtx = (*ret.first).second;
          wtx.BindWallet(this);
          bool fInsertedNew = ret.second;
          if (fInsertedNew) {
              wtx.nTimeReceived = bitsystem::GetAdjustedTime();
              wtx.nOrderPos = IncOrderPosNext();
  
              wtx.nTimeSmart = wtx.nTimeReceived;
              if (wtxIn.hashBlock != 0) {
                  if (block_info::mapBlockIndex.count(wtxIn.hashBlock)) {
                      unsigned int latestNow = wtx.nTimeReceived;
                      unsigned int 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;
                              }
                          }
                      }
  
                      unsigned int &blocktime = block_info::mapBlockIndex[wtxIn.hashBlock]->nTime;
                      wtx.nTimeSmart = std::max(latestEntry, std::min(blocktime, latestNow));
                  } else {
                      printf("AddToWallet() : found %s in block %s not in index\n", wtxIn.GetHash().ToString().substr(0,10).c_str(), wtxIn.hashBlock.ToString().c_str());
                  }
              }
          }
  
          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.SetDestination(vchDefaultKey.GetID());
          BOOST_FOREACH(const CTxOut &txout, wtx.vout)
          {
              if (txout.scriptPubKey == scriptDefaultKey) {
                  CPubKey newDefaultKey;
                  if (GetKeyFromPool(newDefaultKey, false)) {
                      SetDefaultKey(newDefaultKey);
                      SetAddressBookName(vchDefaultKey.GetID(), "");
                  }
              }
          }
  #endif
          // since AddToWallet is called directly for self-originating transactions, check for consumption of own coins
          WalletUpdateSpent(wtx, (wtxIn.hashBlock != 0));
  
          // Notify UI of new or updated transaction
          NotifyTransactionChanged(this, hash, fInsertedNew ? CT_NEW : CT_UPDATED);
          vMintingWalletUpdated.push_back(hash);
  
          // notify an external script when a wallet transaction comes in or is updated
          std::string strCmd = map_arg::GetArg("-walletnotify", "");
  
          if (! strCmd.empty()) {
              boost::replace_all(strCmd, "%s", wtxIn.GetHash().GetHex());
              boost::thread t(cmd::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)
  {
      uint256 hash = tx.GetHash();
      {
          LOCK(cs_wallet);
          bool fExisted = mapWallet.count(hash) != 0;
          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;
  }
  
  isminetype CWallet::IsMine(const CTxIn &txin) const
  {
      {
          LOCK(cs_wallet);
          std::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()) {
                  return IsMine(prev.vout[txin.prevout.n]);
              }
          }
      }
      return MINE_NO;
  }
  
  //
  // marks certain txout's as spent
  // returns true if any update took place
  //
  bool CWalletTx::UpdateSpent(const std::vector<char> &vfNewSpent)
  {
      bool fReturn = false;
      for (unsigned int i = 0; i < vfNewSpent.size(); ++i)
      {
          if (i == vfSpent.size()) {
              break;
          }
          if (vfNewSpent[i] && !vfSpent[i]) {
              vfSpent[i] = true;
              fReturn = true;
              fAvailableCreditCached = fAvailableWatchCreditCached = false;
          }
      }
      return fReturn;
  }
  
  //
  // make sure balances are recalculated
  //
  void CWalletTx::MarkDirty()
  {
      fCreditCached = false;
      fAvailableCreditCached = fAvailableWatchCreditCached = false;
      fDebitCached = fWatchDebitCached = false;
      fChangeCached = false;
  }
  
  void CWalletTx::BindWallet(CWallet *pwalletIn)
  {
      pwallet = pwalletIn;
      MarkDirty();
  }
  
  void CWalletTx::MarkSpent(unsigned int nOut)
  {
      if (nOut >= vout.size()) {
          throw std::runtime_error("CWalletTx::MarkSpent() : nOut out of range");
      }
  
      vfSpent.resize(vout.size());
      if (! vfSpent[nOut]) {
          vfSpent[nOut] = true;
          fAvailableCreditCached = fAvailableWatchCreditCached = false;
      }
  }
  
  void CWalletTx::MarkUnspent(unsigned int nOut)
  {
      if (nOut >= vout.size()) {
          throw std::runtime_error("CWalletTx::MarkUnspent() : nOut out of range");
      }
  
      vfSpent.resize(vout.size());
      if (vfSpent[nOut]) {
          vfSpent[nOut] = false;
          fAvailableCreditCached = fAvailableWatchCreditCached = false;
      }
  }
  
  bool CWalletTx::IsSpent(unsigned int nOut) const
  {
      if (nOut >= vout.size()) {
          throw std::runtime_error("CWalletTx::IsSpent() : nOut out of range");
      }
      if (nOut >= vfSpent.size()) {
          return false;
      }
  
      return (!!this->vfSpent[nOut]);
  }
  
  int64_t CWallet::GetDebit(const CTxIn &txin, const isminefilter &filter) const
  {
      {
          LOCK(cs_wallet);
          std::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]) & filter) {
                      return prev.vout[txin.prevout.n].nValue;
                  }
              }
          }
      }
      return 0;
  }
  
  isminetype CWallet::IsMine(const CTxOut &txout) const
  {
      // return ::IsMine(*this, txout.scriptPubKey);
      return Script_util::IsMine(*this, txout.scriptPubKey);
  }
  
  int64_t CWallet::GetCredit(const CTxOut &txout, const isminefilter &filter) const
  {
      if (! block_transaction::manage::MoneyRange(txout.nValue)) {
          throw std::runtime_error("CWallet::GetCredit() : value out of range");
      }
  
      return (IsMine(txout) & filter ? txout.nValue : 0);
  }
  
  bool CWallet::IsChange(const CTxOut &txout) const
  {
      // TODO: fix handling of 'change' outputs. The assumption is that any
      // payment to a script that is ours, 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 (::IsMine(*this, txout.scriptPubKey))
      if (Script_util::IsMine(*this, txout.scriptPubKey)) {
          CTxDestination address;
          if (! Script_util::ExtractDestination(txout.scriptPubKey, address)) {
              return true;
          }
  
          LOCK(cs_wallet);
          if (! mapAddressBook.count(address)) {
              return true;
          }
      }
      return false;
  }
  
  int64_t CWallet::GetChange(const CTxOut &txout) const
  {
      if (! block_transaction::manage::MoneyRange(txout.nValue)) {
          throw std::runtime_error("CWallet::GetChange() : value out of range");
      }
  
      return (IsChange(txout) ? txout.nValue : 0);
  }
  
  bool CWallet::IsMine(const CTransaction &tx) const
  {
      BOOST_FOREACH(const CTxOut &txout, tx.vout)
      {
          if (IsMine(txout) && txout.nValue >= block_info::nMinimumInputValue) {
              return true;
          }
      }
      return false;
  }
  
  bool CWallet::IsFromMe(const CTransaction &tx) const
  {
      return (GetDebit(tx, MINE_ALL) > 0);
  }
  
  int64_t CWallet::GetDebit(const CTransaction &tx, const isminefilter &filter) const
  {
      int64_t nDebit = 0;
      BOOST_FOREACH(const CTxIn &txin, tx.vin)
      {
          nDebit += GetDebit(txin, filter);
          if (! block_transaction::manage::MoneyRange(nDebit)) {
              throw std::runtime_error("CWallet::GetDebit() : value out of range");
          }
      }
      return nDebit;
  }
  
  int64_t CWallet::GetCredit(const CTransaction &tx, const isminefilter &filter) const
  {
      int64_t nCredit = 0;
      BOOST_FOREACH(const CTxOut &txout, tx.vout)
      {
          nCredit += GetCredit(txout, filter);
          if (! block_transaction::manage::MoneyRange(nCredit)) {
              throw std::runtime_error("CWallet::GetCredit() : value out of range");
          }
      }
      return nCredit;
  }
  
  int64_t CWallet::GetChange(const CTransaction &tx) const
  {
      int64_t nChange = 0;
      BOOST_FOREACH(const CTxOut &txout, tx.vout)
      {
          nChange += GetChange(txout);
          if (! block_transaction::manage::MoneyRange(nChange)) {
              throw std::runtime_error("CWallet::GetChange() : value out of range");
          }
      }
      return nChange;
  }
  
  int64_t CWalletTx::GetTxTime() const
  {
      return nTime;
  }
  
  int CWalletTx::GetRequestCount() const
  {
      // Returns -1 if it wasn't being tracked
      int nRequests = -1;
      {
          LOCK(pwallet->cs_wallet);
          if (IsCoinBase() || IsCoinStake()) {
              // Generated block
              if (hashBlock != 0) {
                  std::map<uint256, int>::const_iterator mi = pwallet->mapRequestCount.find(hashBlock);
                  if (mi != pwallet->mapRequestCount.end()) {
                      nRequests = (*mi).second;
                  }
              }
          } else {
              //
              // Did anyone request this transaction?
              //
              std::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) {
                      std::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;
  }
  
  bool CWalletTx::InMempool() const
  {
      LOCK(CTxMemPool::mempool.cs);
      if (CTxMemPool::mempool.exists(GetHash())) {
          return true;
      }
  
      return false;
  }
  
  bool CWalletTx::IsTrusted() const
  {
      //
      // Quick answer in most cases
      //
      if (! IsFinal()) {
          return false;
      }
  
      int nDepth = GetDepthInMainChain();
      if (nDepth >= 1) {
          return true;
      }
      if (nDepth < 0) {
          return false;
      }
      if (!args_bool::fConfChange || !IsFromMe(MINE_ALL)) { // using wtx's cached debit
          return false;
      }
  
      // Don't trust unconfirmed transactions from us unless they are in the CTxMemPool::mempool.
      if (! InMempool()) {
          return false;
      }
  
      // Trusted if all inputs are from us and are in the CTxMemPool::mempool:
      BOOST_FOREACH(const CTxIn &txin, vin)
      {
          // Transactions not sent by us: not trusted
          const CWalletTx *parent = pwallet->GetWalletTx(txin.prevout.hash);
          if (parent == NULL) {
              return false;
          }
  
          const CTxOut &parentOut = parent->vout[txin.prevout.n];
          if (pwallet->IsMine(parentOut) != MINE_SPENDABLE) {
              return false;
          }
      }
      return true;
  }
  
  int64_t CWalletTx::GetDebit(const isminefilter &filter) const
  {
      if (vin.empty()) {
          return 0;
      }
  
      int64_t nDebit = 0;
      if (filter & MINE_SPENDABLE) {
          if (fDebitCached) {
              nDebit += nDebitCached;
          } else {
              nDebitCached = pwallet->GetDebit(*this, MINE_SPENDABLE);
              fDebitCached = true;
              nDebit += nDebitCached;
          }
      }
  
      if (filter & MINE_WATCH_ONLY) {
          if (fWatchDebitCached) {
              nDebit += nWatchDebitCached;
          } else {
              nWatchDebitCached = pwallet->GetDebit(*this, MINE_WATCH_ONLY);
              fWatchDebitCached = true;
              nDebit += nWatchDebitCached;
          }
      }
      return nDebit;
  }
  
  int64_t CWalletTx::GetCredit(const isminefilter &filter) const
  {
      // Must wait until coinbase is safely deep enough in the chain before valuing it
      if ((IsCoinBase() || IsCoinStake()) && GetBlocksToMaturity() > 0) {
          return 0;
      }
  
      int64_t credit = 0;
      if (filter & MINE_SPENDABLE) {
          // GetBalance can assume transactions in mapWallet won't change
          if (fCreditCached) {
              credit += nCreditCached;
          } else {
              nCreditCached = pwallet->GetCredit(*this, MINE_SPENDABLE);
              fCreditCached = true;
              credit += nCreditCached;
          }
      }
  
      if (filter & MINE_WATCH_ONLY) {
          if (fWatchCreditCached) {
              credit += nWatchCreditCached;
          } else {
              nWatchCreditCached = pwallet->GetCredit(*this, MINE_WATCH_ONLY);
              fWatchCreditCached = true;
              credit += nWatchCreditCached;
          }
      }
  
      return credit;
  }
  
  int64_t CWalletTx::GetImmatureCredit(bool fUseCache) const
  {
      if (IsCoinBase() && GetBlocksToMaturity() > 0 && IsInMainChain()) {
          if (fUseCache && fImmatureCreditCached) {
              return nImmatureCreditCached;
          }
  
          nImmatureCreditCached = pwallet->GetCredit(*this, MINE_SPENDABLE);
          fImmatureCreditCached = true;
          return nImmatureCreditCached;
      }
  
      return 0;
  }
  
  int64_t CWalletTx::GetImmatureWatchOnlyCredit(bool fUseCache) const
  {
      if (IsCoinBase() && GetBlocksToMaturity() > 0 && IsInMainChain()) {
          if (fUseCache && fImmatureWatchCreditCached) {
              return nImmatureWatchCreditCached;
          }
  
          nImmatureWatchCreditCached = pwallet->GetCredit(*this, MINE_WATCH_ONLY);
          fImmatureWatchCreditCached = true;
          return nImmatureWatchCreditCached;
      }
  
      return 0;
  }
  
  int64_t CWalletTx::GetAvailableCredit(bool fUseCache) const
  {
      //
      // Must wait until coinbase is safely deep enough in the chain before valuing it
      //
      if ((IsCoinBase() || IsCoinStake()) && GetBlocksToMaturity() > 0) {
          return 0;
      }
  
      if (fUseCache) {
          if (fAvailableCreditCached) {
              return nAvailableCreditCached;
          }
      }
  
      int64_t nCredit = 0;
      for (unsigned int i = 0; i < vout.size(); ++i)
      {
          if (! IsSpent(i)) {
              const CTxOut &txout = vout[i];
              nCredit += pwallet->GetCredit(txout, MINE_SPENDABLE);
              if (! block_transaction::manage::MoneyRange(nCredit)) {
                  throw std::runtime_error("CWalletTx::GetAvailableCredit() : value out of range");
              }
          }
      }
  
      nAvailableCreditCached = nCredit;
      fAvailableCreditCached = true;
  
      return nCredit;
  }
  
  int64_t CWalletTx::GetAvailableWatchCredit(bool fUseCache) const
  {
      // Must wait until coinbase is safely deep enough in the chain before valuing it
      if ((IsCoinBase() || IsCoinStake()) && GetBlocksToMaturity() > 0) {
          return 0;
      }
  
      if (fUseCache) {
          if (fAvailableWatchCreditCached) {
              return nAvailableWatchCreditCached;
          }
      }
  
      int64_t nCredit = 0;
      for (unsigned int i = 0; i < vout.size(); ++i)
      {
          if (! IsSpent(i)) {
              const CTxOut &txout = vout[i];
              nCredit += pwallet->GetCredit(txout, MINE_WATCH_ONLY);
              if (! block_transaction::manage::MoneyRange(nCredit)) {
                  throw std::runtime_error("CWalletTx::GetAvailableCredit() : value out of range");
              }
          }
      }
  
      nAvailableWatchCreditCached = nCredit;
      fAvailableWatchCreditCached = true;
  
      return nCredit;
  }
  
  int64_t CWalletTx::GetChange() const
  {
      if (fChangeCached) {
          return nChangeCached;
      }
  
      nChangeCached = pwallet->GetChange(*this);
      fChangeCached = true;
      return nChangeCached;
  }
  
  void CWalletTx::GetAmounts(int64_t &nGeneratedImmature, int64_t &nGeneratedMature, std::list<std::pair<CBitcoinAddress, int64_t> > &listReceived,
                             std::list<std::pair<CBitcoinAddress, int64_t> > &listSent, int64_t &nFee, std::string &strSentAccount, const isminefilter &filter) const
  {
      nGeneratedImmature = nGeneratedMature = nFee = 0;
      listReceived.clear();
      listSent.clear();
      strSentAccount = strFromAccount;
  
      if (IsCoinBase() || IsCoinStake()) {
          if (GetBlocksToMaturity() > 0) {
              nGeneratedImmature = pwallet->GetCredit(*this, filter);
          } else {
              nGeneratedMature = GetCredit(filter);
          }
  
          return;
      }
  
      //
      // Compute fee
      //
      int64_t nDebit = GetDebit(filter);
      if (nDebit > 0) {    // debit>0 means we signed/sent this transaction
          int64_t nValueOut = GetValueOut();
          nFee = nDebit - nValueOut;
      }
  
      //
      // Sent / received
      //
      BOOST_FOREACH(const CTxOut &txout, vout)
      {
          isminetype fIsMine = pwallet->IsMine(txout);
  
          // Only need to handle txouts if AT LEAST one of these is true:
          //   1) they debit from us (sent)
          //   2) the output is to us (received)
          if (nDebit > 0) {
              //
              // Don't report 'change' txouts
              //
              if (pwallet->IsChange(txout)) {
                  continue;
              }
          } else if (!(fIsMine & filter)) {
              continue;
          }
  
          // In either case, we need to get the destination address
          CBitcoinAddress address;
          if (! Script_util::ExtractAddress(*pwallet, txout.scriptPubKey, address)) {
              printf("CWalletTx::GetAmounts: Unknown transaction type found, txid %s\n", GetHash().ToString().c_str());
              address = CBitcoinAddress();
          }
  
          // If we are debited by the transaction, add the output as a "sent" entry
          if (nDebit > 0) {
              listSent.push_back(std::make_pair(address, txout.nValue));
          }
  
          // If we are receiving the output, add it as a "received" entry
          if (fIsMine & filter) {
              listReceived.push_back(std::make_pair(address, txout.nValue));
          }
      }
  }
  
  void CWalletTx::GetAccountAmounts(const std::string &strAccount, int64_t &nGenerated, int64_t &nReceived, int64_t &nSent, int64_t &nFee, const isminefilter &filter) const
  {
      nGenerated = nReceived = nSent = nFee = 0;
  
      int64_t allGeneratedImmature, allGeneratedMature, allFee;
      allGeneratedImmature = allGeneratedMature = allFee = 0;
      std::string strSentAccount;
      std::list<std::pair<CBitcoinAddress, int64_t> > listReceived;
      std::list<std::pair<CBitcoinAddress, int64_t> > listSent;
  
      GetAmounts(allGeneratedImmature, allGeneratedMature, listReceived, listSent, allFee, strSentAccount, filter);
  
      if (strAccount.empty()) {
          nGenerated = allGeneratedMature;
      }
      if (strAccount == strSentAccount) {
          BOOST_FOREACH(const PAIRTYPE(CBitcoinAddress,int64_t) &s, listSent)
          {
              nSent += s.second;
          }
          nFee = allFee;
      }
      {
          LOCK(pwallet->cs_wallet);
          BOOST_FOREACH(const PAIRTYPE(CBitcoinAddress,int64_t) &r, listReceived)
          {
              if (pwallet->mapAddressBook.count(r.first)) {
                  std::map<CBitcoinAddress, std::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) {
          std::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);
              std::map<uint256, const CMerkleTx *> mapWalletPrev;
              std::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;
                  std::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 (!args_bool::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)) {
          return 1;
      }
      return 0;
  }
  
  void CWallet::ReacceptWalletTransactions()
  {
      CTxDB txdb("r");
      bool fRepeat = true;
      while (fRepeat)
      {
          LOCK(cs_wallet);
          fRepeat = false;
  
          std::vector<CDiskTxPos> vMissingTx;
          BOOST_FOREACH(PAIRTYPE(const uint256, CWalletTx) &item, mapWallet)
          {
              CWalletTx &wtx = item.second;
              if ((wtx.IsCoinBase() && wtx.IsSpent(0)) || (wtx.IsCoinStake() && wtx.IsSpent(1))) {
                  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() %" PRIszu " != wtx.vout.size() %" PRIszu "\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 %s %ssora %s\n", coin_param::strCoinName.c_str(), bitstr::FormatMoney(wtx.GetCredit(MINE_ALL)).c_str(), wtx.GetHash().ToString().c_str());
                      wtx.MarkDirty();
                      wtx.WriteToDisk();
                  }
              } else {
                  //
                  // Re-accept any txes of ours that aren't already in a block
                  //
                  if (!(wtx.IsCoinBase() || wtx.IsCoinStake())) {
                      wtx.AcceptWalletTransaction(txdb, false);
                  }
              }
          }
          if (! vMissingTx.empty()) {
              //
              // TODO: optimize this to scan just part of the block chain?
              //
              if (ScanForWalletTransactions(block_info::pindexGenesisBlock)) {
                  fRepeat = true;  // Found missing transactions: re-do re-accept.
              }
          }
      }
  }
  
  bool CWalletTx::RelayWalletTransaction(CTxDB &txdb)
  {
      uint256 hash = GetHash();
      if (IsCoinBase() || IsCoinStake() || txdb.ContainsTx(hash) || !InMempool()) {
          return false;
      }
  
      for(std::vector<CMerkleTx>::const_iterator it = vtxPrev.begin(); it != vtxPrev.end(); it++)
      {
          const CMerkleTx& tx = *it;
          uint256 hash = tx.GetHash();
  
          if (tx.IsCoinBase() || tx.IsCoinStake()) {
              continue;
          }
  
          if (! txdb.ContainsTx(hash)) {
              bitrelay::RelayTransaction((CTransaction)tx, hash);
          }
      }
  
      printf("Relaying wtx %s\n", hash.ToString().substr(0,10).c_str());
      bitrelay::RelayTransaction((CTransaction)*this, hash);
      return true;
  }
  
  bool CWalletTx::RelayWalletTransaction()
  {
      CTxDB txdb("r");
      return RelayWalletTransaction(txdb);
  }
  
  std::vector<uint256> CWallet::ResendWalletTransactionsBefore(int64_t nTime)
  {
      std::vector<uint256> result;
  
      LOCK(cs_wallet);
      //
      // Sort them in chronological order
      //
      std::map<unsigned int, CWalletTx *> mapSorted;
      BOOST_FOREACH(PAIRTYPE(const uint256, CWalletTx) &item, mapWallet)
      {
          CWalletTx &wtx = item.second;
          //
          // Don't rebroadcast if newer than nTime
          //
          if (wtx.nTimeReceived > nTime) {
              continue;
          }
          mapSorted.insert(std::make_pair(wtx.nTimeReceived, &wtx));
      }
  
      BOOST_FOREACH(PAIRTYPE(const unsigned int, CWalletTx *) &item, mapSorted)
      {
          CWalletTx &wtx = *item.second;
          if (wtx.RelayWalletTransaction()) {
              result.push_back(wtx.GetHash());
          }
      }
  
      return result;
  }
  
  void CWallet::ResendWalletTransactions(int64_t nBestBlockTime)
  {
      int64_t nNow = bitsystem::GetTime();
  
      //
      // Do this infrequently and randomly to avoid giving away
      // that these are our transactions.
      //
      if (nNow < nNextResend) {
          return;
      }
  
      bool fFirst = (nNextResend == 0);
      nNextResend = future_time::PoissonNextSend(nNow, 5 * 60);
      if (fFirst) {
          return;
      }
  
      // Only do it if there's been a new block since last time
      if (nBestBlockTime < nLastResend) {
          return;
      }
  
      nLastResend = nNow;
  
      // Rebroadcast unconfirmed txes older than 5 minutes before the last
      // block was found:
      std::vector<uint256> relayed = ResendWalletTransactionsBefore(nBestBlockTime - 5 * 60);
      if (! relayed.empty()) {
          printf("CWallet::ResendWalletTransactions: rebroadcast %" PRIszu " unconfirmed transactions\n", relayed.size());
      }
  }
  
  //
  // Actions
  //
  int64_t CWallet::GetBalance() const
  {
      int64_t nTotal = 0;
      {
          LOCK(cs_wallet);
          for (std::map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
          {
              const CWalletTx *pcoin = &(*it).second;
              if (pcoin->IsTrusted()) {
                  nTotal += pcoin->GetAvailableCredit();
              }
          }
      }
  
      return nTotal;
  }
  
  int64_t CWallet::GetWatchOnlyBalance() const
  {
      int64_t nTotal = 0;
      {
          LOCK(cs_wallet);
          for (std::map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
          {
              const CWalletTx *pcoin = &(*it).second;
              if (pcoin->IsTrusted()) {
                  nTotal += pcoin->GetAvailableWatchCredit();
              }
          }
      }
  
      return nTotal;
  }
  
  int64_t CWallet::GetUnconfirmedBalance() const
  {
      int64_t nTotal = 0;
      {
          LOCK(cs_wallet);
          for (std::map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
          {
              const CWalletTx* pcoin = &(*it).second;
              if (!pcoin->IsFinal() || !pcoin->IsTrusted()) {
                  nTotal += pcoin->GetAvailableCredit();
              }
          }
      }
  
      return nTotal;
  }
  
  int64_t CWallet::GetUnconfirmedWatchOnlyBalance() const
  {
      int64_t nTotal = 0;
      {
          LOCK(cs_wallet);
          for (std::map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
          {
              const CWalletTx *pcoin = &(*it).second;
              if (!pcoin->IsFinal() || !pcoin->IsTrusted()) {
                  nTotal += pcoin->GetAvailableWatchCredit();
              }
          }
      }
  
      return nTotal;
  }
  
  int64_t CWallet::GetImmatureBalance() const
  {
      int64_t nTotal = 0;
      {
          LOCK(cs_wallet);
          for (std::map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
          {
              const CWalletTx *pcoin = &(*it).second;
              nTotal += pcoin->GetImmatureCredit();
          }
      }
  
      return nTotal;
  }
  
  int64_t CWallet::GetImmatureWatchOnlyBalance() const
  {
      int64_t nTotal = 0;
      {
          LOCK(cs_wallet);
          for (std::map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
          {
              const CWalletTx *pcoin = &(*it).second;
              nTotal += pcoin->GetImmatureWatchOnlyCredit();
          }
      }
  
      return nTotal;
  }
  
  //
  // populate vCoins with vector of spendable COutputs
  //
  void CWallet::AvailableCoins(std::vector<COutput> &vCoins, bool fOnlyConfirmed, const CCoinControl *coinControl) const
  {
      vCoins.clear();
  
      {
          LOCK(cs_wallet);
          for (std::map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
          {
              const CWalletTx *pcoin = &(*it).second;
  
              if (! pcoin->IsFinal()) {
                  continue;
              }
  
              if (fOnlyConfirmed && !pcoin->IsTrusted()) {
                  continue;
              }
  
              if (pcoin->IsCoinBase() && pcoin->GetBlocksToMaturity() > 0) {
                  continue;
              }
  
              if(pcoin->IsCoinStake() && pcoin->GetBlocksToMaturity() > 0) {
                  continue;
              }
  
              for (unsigned int i = 0; i < pcoin->vout.size(); ++i)
              {
                  isminetype mine = IsMine(pcoin->vout[i]);
                  if (!(pcoin->IsSpent(i)) && mine != MINE_NO && pcoin->vout[i].nValue >= block_info::nMinimumInputValue && (!coinControl || !coinControl->HasSelected() || coinControl->IsSelected((*it).first, i))) {
                      vCoins.push_back(COutput(pcoin, i, pcoin->GetDepthInMainChain(), mine == MINE_SPENDABLE));
                  }
              }
          }
      }
  }
  
  void CWallet::AvailableCoinsMinConf(std::vector<COutput> &vCoins, int nConf, int64_t nMinValue, int64_t nMaxValue) const
  {
      vCoins.clear();
  
      {
          LOCK(cs_wallet);
          for (std::map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
          {
              const CWalletTx *pcoin = &(*it).second;
  
              if (! pcoin->IsFinal()) {
                  continue;
              }
  
              if(pcoin->GetDepthInMainChain() < nConf) {
                  continue;
              }
  
              for (unsigned int i = 0; i < pcoin->vout.size(); ++i)
              {
                  isminetype mine = IsMine(pcoin->vout[i]);
  
                  // ignore coin if it was already spent or we don't own it
                  if (pcoin->IsSpent(i) || mine == MINE_NO) {
                      continue;
                  }
  
                  // if coin value is between required limits then add new item to vector
                  if (pcoin->vout[i].nValue >= nMinValue && pcoin->vout[i].nValue < nMaxValue) {
                      vCoins.push_back(COutput(pcoin, i, pcoin->GetDepthInMainChain(), mine == MINE_SPENDABLE));
                  }
              }
          }
      }
  }
  
  int64_t CWallet::GetStake() const
  {
      int64_t nTotal = 0;
      LOCK(cs_wallet);
      for (std::map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
      {
          const CWalletTx *pcoin = &(*it).second;
          if (pcoin->IsCoinStake() && pcoin->GetBlocksToMaturity() > 0 && pcoin->GetDepthInMainChain() > 0) {
              nTotal += CWallet::GetCredit(*pcoin, MINE_ALL);
          }
      }
  
      return nTotal;
  }
  
  int64_t CWallet::GetWatchOnlyStake() const
  {
      int64_t nTotal = 0;
      LOCK(cs_wallet);
      for (std::map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
      {
          const CWalletTx *pcoin = &(*it).second;
          if (pcoin->IsCoinStake() && pcoin->GetBlocksToMaturity() > 0 && pcoin->GetDepthInMainChain() > 0) {
              nTotal += CWallet::GetCredit(*pcoin, MINE_WATCH_ONLY);
          }
      }
  
      return nTotal;
  }
  
  int64_t CWallet::GetNewMint() const
  {
      int64_t nTotal = 0;
      LOCK(cs_wallet);
      for (std::map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
      {
          const CWalletTx *pcoin = &(*it).second;
          if (pcoin->IsCoinBase() && pcoin->GetBlocksToMaturity() > 0 && pcoin->GetDepthInMainChain() > 0) {
              nTotal += CWallet::GetCredit(*pcoin, MINE_ALL);
          }
      }
  
      return nTotal;
  }
  
  int64_t CWallet::GetWatchOnlyNewMint() const
  {
      int64_t nTotal = 0;
      LOCK(cs_wallet);
      for (std::map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
      {
          const CWalletTx *pcoin = &(*it).second;
          if (pcoin->IsCoinBase() && pcoin->GetBlocksToMaturity() > 0 && pcoin->GetDepthInMainChain() > 0) {
              nTotal += CWallet::GetCredit(*pcoin, MINE_WATCH_ONLY);
          }
      }
  
      return nTotal;
  }
  
  bool CWallet::SelectCoinsMinConf(int64_t nTargetValue, unsigned int nSpendTime, int nConfMine, int nConfTheirs, std::vector<COutput> vCoins, std::set<std::pair<const CWalletTx *,unsigned int> > &setCoinsRet, int64_t &nValueRet) const
  {
      auto ApproximateBestSubset = [](std::vector<std::pair<int64_t, std::pair<const CWalletTx *,unsigned int> > >vValue, int64_t nTotalLower, int64_t nTargetValue, std::vector<char> &vfBest, int64_t &nBest, int iterations /* = 1000 */)
      {
          std::vector<char> vfIncluded;
  
          vfBest.assign(vValue.size(), true);
          nBest = nTotalLower;
  
          for (int nRep = 0; nRep < iterations && nBest != nTargetValue; ++nRep)
          {
              vfIncluded.assign(vValue.size(), false);
              int64_t 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;
                          }
                      }
                  }
              }
          }
      };
  
      setCoinsRet.clear();
      nValueRet = 0;
  
      // List of values less than target
      std::pair<int64_t, std::pair<const CWalletTx *,unsigned int> > coinLowestLarger;
      coinLowestLarger.first = std::numeric_limits<int64_t>::max();
      coinLowestLarger.second.first = NULL;
      std::vector<std::pair<int64_t, std::pair<const CWalletTx *,unsigned int> > > vValue;
      int64_t nTotalLower = 0;
  
      random_shuffle(vCoins.begin(), vCoins.end(), bitsystem::GetRandInt);
  
      BOOST_FOREACH(const COutput &output, vCoins)
      {
          if (! output.fSpendable) {
              continue;
          }
  
          const CWalletTx *pcoin = output.tx;
  
          if (output.nDepth < (pcoin->IsFromMe(MINE_ALL) ? nConfMine : nConfTheirs)) {
              continue;
          }
  
          int i = output.i;
  
          // Follow the timestamp rules
          if (pcoin->nTime > nSpendTime) {
              continue;
          }
  
          int64_t n = pcoin->vout[i].nValue;
  
          std::pair<int64_t, std::pair<const CWalletTx *,unsigned int> > coin = std::make_pair(n, std::make_pair(pcoin, i));
  
          if (n == nTargetValue) {
              setCoinsRet.insert(coin.second);
              nValueRet += coin.first;
              return true;
          } else if (n < nTargetValue + util::CENT) {
              vValue.push_back(coin);
              nTotalLower += n;
          } else if (n < coinLowestLarger.first) {
              coinLowestLarger = coin;
          }
      }
  
      if (nTotalLower == nTargetValue) {
          for (unsigned int i = 0; i < vValue.size(); ++i)
          {
              setCoinsRet.insert(vValue[i].second);
              nValueRet += vValue[i].first;
          }
          return true;
      }
  
      if (nTotalLower < nTargetValue) {
          if (coinLowestLarger.second.first == NULL) {
              return false;
          }
  
          setCoinsRet.insert(coinLowestLarger.second);
          nValueRet += coinLowestLarger.first;
          return true;
      }
  
      // Solve subset sum by stochastic approximation
      std::sort(vValue.rbegin(), vValue.rend(), CompareValueOnly());
      std::vector<char> vfBest;
      int64_t nBest;
  
      ApproximateBestSubset(vValue, nTotalLower, nTargetValue, vfBest, nBest, 1000);
      if (nBest != nTargetValue && nTotalLower >= nTargetValue + util::CENT) {
          ApproximateBestSubset(vValue, nTotalLower, nTargetValue + util::CENT, vfBest, nBest, 1000);
      }
  
      // If we have a bigger coin and (either the stochastic approximation didn't find a good solution, or the next bigger coin is closer), return the bigger coin
      if (coinLowestLarger.second.first && ((nBest != nTargetValue && nBest < nTargetValue + util::CENT) || coinLowestLarger.first <= nBest)) {
          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;
              }
          }
  
          if (args_bool::fDebug && map_arg::GetBoolArg("-printpriority")) {
              ////
              //// debug print
              ////
              printf("SelectCoins() best subset: ");
              for (unsigned int i = 0; i < vValue.size(); ++i)
              {
                  if (vfBest[i]) {
                      printf("%s ", bitstr::FormatMoney(vValue[i].first).c_str());
                  }
              }
              printf("total %s\n", bitstr::FormatMoney(nBest).c_str());
          }
      }
  
      return true;
  }
  
  bool CWallet::SelectCoins(int64_t nTargetValue, unsigned int nSpendTime, std::set<std::pair<const CWalletTx *,unsigned int> > &setCoinsRet, int64_t &nValueRet, const CCoinControl *coinControl) const
  {
      std::vector<COutput> vCoins;
      AvailableCoins(vCoins, true, coinControl);
  
      //
      // coin control -> return all selected outputs (we want all selected to go into the transaction for sure)
      //
      if (coinControl && coinControl->HasSelected()) {
          BOOST_FOREACH(const COutput &out, vCoins)
          {
              if(! out.fSpendable) {
                  continue;
              }
  
              nValueRet += out.tx->vout[out.i].nValue;
              setCoinsRet.insert(std::make_pair(out.tx, out.i));
          }
          return (nValueRet >= nTargetValue);
      }
  
      return (SelectCoinsMinConf(nTargetValue, nSpendTime, 1, 6, vCoins, setCoinsRet, nValueRet) ||
              SelectCoinsMinConf(nTargetValue, nSpendTime, 1, 1, vCoins, setCoinsRet, nValueRet) ||
              SelectCoinsMinConf(nTargetValue, nSpendTime, 0, 1, vCoins, setCoinsRet, nValueRet));
  }
  
  // Select some coins without random shuffle or best subset approximation
  bool CWallet::SelectCoinsSimple(int64_t nTargetValue, int64_t nMinValue, int64_t nMaxValue, unsigned int nSpendTime, int nMinConf, std::set<std::pair<const CWalletTx *,unsigned int> > &setCoinsRet, int64_t &nValueRet) const
  {
      std::vector<COutput> vCoins;
      AvailableCoinsMinConf(vCoins, nMinConf, nMinValue, nMaxValue);
  
      setCoinsRet.clear();
      nValueRet = 0;
  
      BOOST_FOREACH(COutput output, vCoins)
      {
          if(! output.fSpendable) {
              continue;
          }
  
          const CWalletTx *pcoin = output.tx;
          int i = output.i;
  
          // Ignore immature coins
          if (pcoin->GetBlocksToMaturity() > 0) {
              continue;
          }
  
          // Stop if we've chosen enough inputs
          if (nValueRet >= nTargetValue) {
              break;
          }
  
          // Follow the timestamp rules
          if (pcoin->nTime > nSpendTime) {
              continue;
          }
  
          int64_t n = pcoin->vout[i].nValue;
  
          std::pair<int64_t, std::pair<const CWalletTx *,unsigned int> > coin = std::make_pair(n, std::make_pair(pcoin, i));
  
          if (n >= nTargetValue) {
              //
              // If input value is greater or equal to target then simply insert
              //    it into the current subset and exit
              //
              setCoinsRet.insert(coin.second);
              nValueRet += coin.first;
              break;
          } else if (n < nTargetValue + util::CENT) {
              setCoinsRet.insert(coin.second);
              nValueRet += coin.first;
          }
      }
  
      return true;
  }
  
  bool CWallet::CreateTransaction(const std::vector<std::pair<CScript, int64_t> > &vecSend, CWalletTx &wtxNew, CReserveKey &reservekey, int64_t &nFeeRet, const CCoinControl *coinControl)
  {
      int64_t nValue = 0;
      BOOST_FOREACH (const PAIRTYPE(CScript, int64_t) &s, vecSend)
      {
          if (nValue < 0) {
              return false;
          }
          nValue += s.second;
      }
      if (vecSend.empty() || nValue < 0) {
          return false;
      }
  
      wtxNew.BindWallet(this);
  
      {
          LOCK2(block_process::cs_main, cs_wallet);
          // txdb must be opened before the mapWallet lock
  
          CTxDB txdb("r");
          {
              nFeeRet = block_info::nTransactionFee;
              for ( ; ; )
              {
                  wtxNew.vin.clear();
                  wtxNew.vout.clear();
                  wtxNew.fFromMe = true;
  
                  int64_t nTotalValue = nValue + nFeeRet;
                  double dPriority = 0;
  
                  // vouts to the payees
                  BOOST_FOREACH (const PAIRTYPE(CScript, int64_t) &s, vecSend)
                  {
                      wtxNew.vout.push_back(CTxOut(s.second, s.first));
                  }
  
                  // Choose coins to use
                  std::set<std::pair<const CWalletTx *,unsigned int> > setCoins;
                  int64_t nValueIn = 0;
                  if (! SelectCoins(nTotalValue, wtxNew.nTime, setCoins, nValueIn, coinControl)) {
                      return false;
                  }
  
                  BOOST_FOREACH(PAIRTYPE(const CWalletTx *, unsigned int) pcoin, setCoins)
                  {
                      int64_t nCredit = pcoin.first->vout[pcoin.second].nValue;
                      dPriority += (double)nCredit * pcoin.first->GetDepthInMainChain();
                  }
  
                  int64_t nChange = nValueIn - nValue - nFeeRet;
                  if (nChange > 0)
                  {
                      //
                      // Fill a vout to ourself
                      // TODO: pass in scriptChange instead of reservekey so
                      // change transaction isn't always pay-to-bitcoin-address
                      //
                      CScript scriptChange;
  
                      if (coinControl && coinControl->destChange.IsValid()) {
                          // coin control: send change to custom address
                          scriptChange.SetAddress(coinControl->destChange);
                      } else {
                          // no coin control: send change to newly generated address
  
                          // 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
                          CPubKey vchPubKey = reservekey.GetReservedKey();
  
                          scriptChange.SetDestination(vchPubKey.GetID());
                      }
  
                      // Insert change txn at random position:
                      std::vector<CTxOut>::iterator position = wtxNew.vout.begin() + bitsystem::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 (! Script_util::SignSignature(*this, *coin.first, wtxNew, nIn++)) {
                          return false;
                      }
                  }
  
                  // Limit size
                  unsigned int nBytes = ::GetSerializeSize(*(CTransaction*)&wtxNew, SER_NETWORK, version::PROTOCOL_VERSION);
                  if (nBytes >= block_param::MAX_BLOCK_SIZE_GEN / 5) {
                      return false;
                  }
                  dPriority /= nBytes;
  
                  // Check that enough fee is included
                  bool fAllowFree = CTransaction::AllowFree(dPriority);
                  int64_t nPayFee = block_info::nTransactionFee * (1 + (int64_t)nBytes / 1000);
                  int64_t nMinFee = wtxNew.GetMinFee(1, fAllowFree, CTransaction::GMF_SEND, nBytes);
  
                  if (nFeeRet < std::max(nPayFee, nMinFee)) {
                      nFeeRet = std::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_t nValue, CWalletTx &wtxNew, CReserveKey &reservekey, int64_t &nFeeRet, const CCoinControl *coinControl)
  {
      std::vector<std::pair<CScript, int64_t> > vecSend;
      vecSend.push_back(std::make_pair(scriptPubKey, nValue));
      return CreateTransaction(vecSend, wtxNew, reservekey, nFeeRet, coinControl);
  }
  
  void CWallet::GetStakeWeightFromValue(const int64_t &nTime, const int64_t &nValue, uint64_t &nWeight)
  {
      int64_t nTimeWeight = bitkernel::GetWeight(nTime, bitsystem::GetTime());
  
      // If time weight is lower or equal to zero then weight is zero.
      if (nTimeWeight <= 0) {
          nWeight = 0;
          return;
      }
  
      CBigNum bnCoinDayWeight = CBigNum(nValue) * nTimeWeight / util::COIN / util::nOneDay;
      nWeight = bnCoinDayWeight.getuint64();
  }
  
  bool CWallet::MergeCoins(const int64_t &nAmount, const int64_t &nMinValue, const int64_t &nOutputValue, std::list<uint256> &listMerged)
  {
      int64_t nBalance = GetBalance();
  
      if (nAmount > nBalance) {
          return false;
      }
  
      listMerged.clear();
      int64_t nValueIn = 0;
      std::set<std::pair<const CWalletTx *,unsigned int> > setCoins;
  
      // Simple coins selection - no randomization
      if (! SelectCoinsSimple(nAmount, nMinValue, nOutputValue, bitsystem::GetTime(), 1, setCoins, nValueIn)) {
          return false;
      }
      if (setCoins.empty()) {
          return false;
      }
  
      CWalletTx wtxNew;
      std::vector<const CWalletTx *> vwtxPrev;
  
      // Reserve a new key pair from key pool
      CReserveKey reservekey(this);
      CPubKey vchPubKey = reservekey.GetReservedKey();
  
      // Output script
      CScript scriptOutput;
      scriptOutput.SetDestination(vchPubKey.GetID());
  
      // Insert output
      wtxNew.vout.push_back(CTxOut(0, scriptOutput));
  
      double dWeight = 0;
      BOOST_FOREACH(PAIRTYPE(const CWalletTx *, unsigned int) pcoin, setCoins)
      {
          int64_t nCredit = pcoin.first->vout[pcoin.second].nValue;
  
          // Add current coin to inputs list and add its credit to transaction output
          wtxNew.vin.push_back(CTxIn(pcoin.first->GetHash(), pcoin.second));
          wtxNew.vout[0].nValue += nCredit;
          vwtxPrev.push_back(pcoin.first);
  
          /*
          // Replaced with estimation for performance purposes
          for (unsigned int i = 0; i < wtxNew.vin.size(); i++)
          {
              const CWalletTx *txin = vwtxPrev[i];
  
              // Sign scripts to get actual transaction size for fee calculation
              if (! Script_util::SignSignature(*this, *txin, wtxNew, i)) {
                  return false;
              }
          }
          */
  
          //
          // Assuming that average scriptsig size is 110 bytes
          //
          int64_t nBytes = ::GetSerializeSize(*(CTransaction *)&wtxNew, SER_NETWORK, version::PROTOCOL_VERSION) + wtxNew.vin.size() * 110;
          dWeight += (double)nCredit * pcoin.first->GetDepthInMainChain();
  
          double dFinalPriority = dWeight /= nBytes;
          bool fAllowFree = CTransaction::AllowFree(dFinalPriority);
  
          // Get actual transaction fee according to its estimated size and priority
          int64_t nMinFee = wtxNew.GetMinFee(1, fAllowFree, CTransaction::GMF_SEND, nBytes);
  
          //
          // Prepare transaction for commit if sum is enough ot its size is too big
          //
          if (nBytes >= block_param::MAX_BLOCK_SIZE_GEN / 6 || wtxNew.vout[0].nValue >= nOutputValue) {
              wtxNew.vout[0].nValue -= nMinFee; // Set actual fee
  
              for (unsigned int i = 0; i < wtxNew.vin.size(); ++i)
              {
                  const CWalletTx *txin = vwtxPrev[i];
  
                  // Sign all scripts
                  if (! Script_util::SignSignature(*this, *txin, wtxNew, i)) {
                      return false;
                  }
              }
  
              // Try to commit, return false on failure
              if (! CommitTransaction(wtxNew, reservekey)) {
                  return false;
              }
  
              listMerged.push_back(wtxNew.GetHash()); // Add to hashes list
  
              dWeight = 0;  // Reset all temporary values
              vwtxPrev.clear();
              wtxNew.SetNull();
              wtxNew.vout.push_back(CTxOut(0, scriptOutput));
          }
      }
  
      //
      // Create transactions if there are some unhandled coins left
      //
      if (wtxNew.vout[0].nValue > 0) {
          int64_t nBytes = ::GetSerializeSize(*(CTransaction *)&wtxNew, SER_NETWORK, version::PROTOCOL_VERSION) + wtxNew.vin.size() * 110;
  
          double dFinalPriority = dWeight /= nBytes;
          bool fAllowFree = CTransaction::AllowFree(dFinalPriority);
  
          // Get actual transaction fee according to its size and priority
          int64_t nMinFee = wtxNew.GetMinFee(1, fAllowFree, CTransaction::GMF_SEND, nBytes);
  
          wtxNew.vout[0].nValue -= nMinFee; // Set actual fee
  
          if (wtxNew.vout[0].nValue <= 0) {
              return false;
          }
  
          for (unsigned int i = 0; i < wtxNew.vin.size(); ++i)
          {
              const CWalletTx *txin = vwtxPrev[i];
  
              // Sign all scripts again
              if (! Script_util::SignSignature(*this, *txin, wtxNew, i)) {
                  return false;
              }
          }
  
          // Try to commit, return false on failure
          if (! CommitTransaction(wtxNew, reservekey)) {
              return false;
          }
  
          listMerged.push_back(wtxNew.GetHash()); // Add to hashes list
      }
  
      return true;
  }
  
  bool CWallet::CreateCoinStake(uint256 &hashTx, uint32_t nOut, uint32_t nGenerationTime, uint32_t nBits, CTransaction &txNew, CKey &key)
  {
      CWalletTx wtx;
      if (! GetTransaction(hashTx, wtx)) {
          return print::error("Transaction %s is not found\n", hashTx.GetHex().c_str());
      }
  
      std::vector<Script_util::valtype> vSolutions;
      TxnOutputType::txnouttype whichType;
      CScript scriptPubKeyOut;
      CScript scriptPubKeyKernel = wtx.vout[nOut].scriptPubKey;
      if (! Script_util::Solver(scriptPubKeyKernel, whichType, vSolutions)) {
          return print::error("CreateCoinStake : failed to parse kernel\n");
      }
  
      if (args_bool::fDebug && map_arg::GetBoolArg("-printcoinstake")) {
          printf("CreateCoinStake : parsed kernel type=%d\n", whichType);
      }
  
      if (whichType != TxnOutputType::TX_PUBKEY && whichType != TxnOutputType::TX_PUBKEYHASH) {
          return print::error("CreateCoinStake : no support for kernel type=%d\n", whichType);
      }
  
      if (whichType == TxnOutputType::TX_PUBKEYHASH) { // pay to address type
          //
          // convert to pay to public key type
          //
          if (! GetKey(uint160(vSolutions[0]), key)) {
              return print::error("CreateCoinStake : failed to get key for kernel type=%d\n", whichType);
          }
  
          scriptPubKeyOut << key.GetPubKey() << ScriptOpcodes::OP_CHECKSIG;
      }
      if (whichType == TxnOutputType::TX_PUBKEY) {
          Script_util::valtype &vchPubKey = vSolutions[0];
          if (! GetKey(hash_basis::Hash160(vchPubKey), key)) {
              return print::error("CreateCoinStake : failed to get key for kernel type=%d\n", whichType);
          }
          if (key.GetPubKey() != vchPubKey) {
              return print::error("CreateCoinStake : invalid key for kernel type=%d\n", whichType); // keys mismatch
          }
  
          scriptPubKeyOut = scriptPubKeyKernel;
      }
  
      //
      // The following combine threshold is important to security
      // Should not be adjusted if you don't understand the consequences
      //
      int64_t nCombineThreshold = diff::reward::GetProofOfWorkReward(diff::spacing::GetLastBlockIndex(block_info::pindexBest, false)->nBits) / 3;
  
      int64_t nBalance = GetBalance();
      int64_t nCredit = wtx.vout[nOut].nValue;
  
      txNew.vin.clear();
      txNew.vout.clear();
  
      // List of constake dependencies
      std::vector<const CWalletTx *> vwtxPrev;
      vwtxPrev.push_back(&wtx);
  
      // Set generation time, and kernel input
      txNew.nTime = nGenerationTime;
      txNew.vin.push_back(CTxIn(hashTx, nOut));
  
      // Mark coin stake transaction with empty vout[0]
      CScript scriptEmpty;
      scriptEmpty.clear();
      txNew.vout.push_back(CTxOut(0, scriptEmpty));
  
      if (args_bool::fDebug && map_arg::GetBoolArg("-printcoinstake")) {
          printf("CreateCoinStake : added kernel type=%d\n", whichType);
      }
  
      int64_t nValueIn = 0;
      CoinsSet setCoins;
      if (! SelectCoinsSimple(nBalance - miner::nReserveBalance, block_param::MIN_TX_FEE, block_param::MAX_MONEY, nGenerationTime, block_transaction::nCoinbaseMaturity * 10, setCoins, nValueIn)) {
          return false;
      }
      if (setCoins.empty()) {
          return false;
      }
  
      bool fDontSplitCoins = false;
      if (bitkernel::GetWeight((int64_t)wtx.nTime, (int64_t)nGenerationTime) == block_check::nStakeMaxAge) {
          //
          // Only one output for old kernel inputs
          //
          txNew.vout.push_back(CTxOut(0, scriptPubKeyOut));
  
          // Iterate through set of (wtx*, nout) in order to find some additional inputs for our new coinstake transaction.
          //
          // * Value is higher than 0.01 SORA;
          // * Only add inputs of the same key/address as kernel;
          // * Input hash and kernel parent hash should be different.
          for(CoinsSet::iterator pcoin = setCoins.begin(); pcoin != setCoins.end(); pcoin++)
          {
              // Stop adding more inputs if already too many inputs
              if (txNew.vin.size() >= 100) {
                  break;
              }
  
              // Stop adding more inputs if value is already pretty significant
              if (nCredit > nCombineThreshold) {
                  break;
              }
  
              // Stop adding inputs if reached reserve limit
              if (nCredit + pcoin->first->vout[pcoin->second].nValue > nBalance - miner::nReserveBalance) {
                  break;
              }
  
              int64_t nTimeWeight = bitkernel::GetWeight((int64_t)pcoin->first->nTime, (int64_t)nGenerationTime);
  
              // Do not add input that is still too young
              if (nTimeWeight < block_check::nStakeMaxAge) {
                  continue;
              }
  
              // Do not add input if key/address is not the same as kernel
              if (pcoin->first->vout[pcoin->second].scriptPubKey != scriptPubKeyKernel && pcoin->first->vout[pcoin->second].scriptPubKey != txNew.vout[1].scriptPubKey) {
                  continue;
              }
  
              // Do not add input if parents are the same
              if (pcoin->first->GetHash() != txNew.vin[0].prevout.hash) {
                  continue;
              }
  
              // Do not add additional significant input
              if (pcoin->first->vout[pcoin->second].nValue > nCombineThreshold) {
                  continue;
              }
  
              txNew.vin.push_back(CTxIn(pcoin->first->GetHash(), pcoin->second));
              nCredit += pcoin->first->vout[pcoin->second].nValue;
              vwtxPrev.push_back(pcoin->first);
          }
  
          fDontSplitCoins = true;
      } else {
          int64_t nSplitThreshold = map_arg::GetArg("-splitthreshold", nCombineThreshold);
  
          if (args_bool::fDebug && map_arg::GetBoolArg("-printcoinstake")) {
              printf("CreateCoinStake : nSplitThreshold=%" PRId64 "\n", nSplitThreshold);
          }
  
          if (nCredit > nSplitThreshold) {
              //
              // Split stake input if credit is lower than combine threshold and maximum weight isn't reached yet
              //
              txNew.vout.push_back(CTxOut(0, scriptPubKeyOut));
              txNew.vout.push_back(CTxOut(0, scriptPubKeyOut));
  
              if (args_bool::fDebug && map_arg::GetBoolArg("-printcoinstake")) {
                  printf("CreateCoinStake : splitting coinstake\n");
              }
          } else {
              txNew.vout.push_back(CTxOut(0, scriptPubKeyOut));
              fDontSplitCoins = true;
          }
      }
  
      // Calculate coin age reward
      uint64_t nCoinAge;
      CTxDB txdb("r");
      if (! txNew.GetCoinAge(txdb, nCoinAge)) {
          return print::error("CreateCoinStake : failed to calculate coin age\n");
      }
  
      nCredit += diff::reward::GetProofOfStakeReward(nCoinAge, nBits, nGenerationTime);
  
      int64_t nMinFee = 0;
      for ( ; ; )
      {
          // Set output amount
          if (fDontSplitCoins) {
              txNew.vout[1].nValue = nCredit - nMinFee;
          } else {
              txNew.vout[1].nValue = ((nCredit - nMinFee) / 2 / util::CENT) * util::CENT;
              txNew.vout[2].nValue = nCredit - nMinFee - txNew.vout[1].nValue;
          }
  
          // Sign
          int nIn = 0;
          BOOST_FOREACH(const CWalletTx *pcoin, vwtxPrev)
          {
              if (! Script_util::SignSignature(*this, *pcoin, txNew, nIn++)) {
                  return print::error("CreateCoinStake : failed to sign coinstake\n");
              }
          }
  
          // Limit size
          unsigned int nBytes = ::GetSerializeSize(txNew, SER_NETWORK, version::PROTOCOL_VERSION);
          if (nBytes >= block_param::MAX_BLOCK_SIZE_GEN / 5) {
              return print::error("CreateCoinStake : exceeded coinstake size limit\n");
          }
  
          // Check enough fee is paid
          if (nMinFee < txNew.GetMinFee(1, false, CTransaction::GMF_BLOCK, nBytes) - util::CENT) {
              nMinFee = txNew.GetMinFee(1, false, CTransaction::GMF_BLOCK, nBytes) - util::CENT;
              continue; // try signing again
          } else {
              if (args_bool::fDebug && map_arg::GetBoolArg("-printfee")) {
                  printf("CreateCoinStake : fee for coinstake %s\n", bitstr::FormatMoney(nMinFee).c_str());
              }
              break;
          }
      }
  
      // Successfully created coinstake
      return true;
  }
  
  // Call after CreateTransaction unless you want to abort
  bool CWallet::CommitTransaction(CWalletTx &wtxNew, CReserveKey &reservekey)
  {
      {
          printf("CommitTransaction:\n%s", wtxNew.ToString().c_str());
  
          // Track how many getdata requests our transaction gets
          mapRequestCount[wtxNew.GetHash()] = 0;
  
          // Try to broadcast before saving
          if (! wtxNew.AcceptToMemoryPool()) {
              // This must not fail. The transaction has already been signed.
              printf("CommitTransaction() : Error: Transaction not valid");
              return false;
          }
  
          wtxNew.RelayWalletTransaction();
  
          {
              LOCK2(block_process::cs_main, cs_wallet);
  
              // 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(std::nothrow) CWalletDB(strWalletFile, "r") : NULL;
              if(fFileBacked && pwalletdb == NULL) {
                  printf("CommitTransaction() : Error: Transaction memory allocate failure.");
                  return false;
              }
  
              // 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
              BOOST_FOREACH(const CTxIn &txin, wtxNew.vin)
              {
                  CWalletTx &coin = mapWallet[txin.prevout.hash];
                  coin.BindWallet(this);
                  coin.MarkSpent(txin.prevout.n);
                  coin.WriteToDisk();
  
                  NotifyTransactionChanged(this, coin.GetHash(), CT_UPDATED);
                  vMintingWalletUpdated.push_back(coin.GetHash());
              }
  
              if (fFileBacked) {
                  delete pwalletdb;
              }
          }
      }
      return true;
  }
  
  std::string CWallet::SendMoney(CScript scriptPubKey, int64_t nValue, CWalletTx &wtxNew, bool fAskFee)
  {
      // Check amount
      if (nValue <= 0) {
          return _("Invalid amount");
      }
      if (nValue + block_info::nTransactionFee > GetBalance()) {
          return _("Insufficient funds");
      }
  
      CReserveKey reservekey(this);
      int64_t nFeeRequired;
  
      if (IsLocked()) {
          std::string strError = _("Error: Wallet locked, unable to create transaction  ");
          printf("SendMoney() : %s", strError.c_str());
          return strError;
      }
  
      if (fWalletUnlockMintOnly) {
          std::string strError = _("Error: Wallet unlocked for block minting only, unable to create transaction.");
          printf("SendMoney() : %s", strError.c_str());
          return strError;
      }
  
      if (! CreateTransaction(scriptPubKey, nValue, wtxNew, reservekey, nFeeRequired)) {
          std::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  "), bitstr::FormatMoney(nFeeRequired).c_str());
          } else {
              strError = _("Error: Transaction creation failed  ");
          }
          printf("SendMoney() : %s", strError.c_str());
          return strError;
      }
  
      if (fAskFee && !CClientUIInterface::uiInterface.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.");
      }
  
      return "";
  }
  
  DBErrors CWallet::LoadWallet(bool &fFirstRunRet)
  {
      if (! fFileBacked) {
          return DB_LOAD_OK;
      }
  
      fFirstRunRet = false;
      DBErrors 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.
          }
      }
  
      if (nLoadWalletRet != DB_LOAD_OK) {
          return nLoadWalletRet;
      }
      fFirstRunRet = !vchDefaultKey.IsValid();
  
      bitthread::manage::NewThread(wallet_dispatch::ThreadFlushWalletDB, &strWalletFile);
      return DB_LOAD_OK;
  }
  
  DBErrors CWallet::ZapWalletTx()
  {
      if (! fFileBacked) {
          return DB_LOAD_OK;
      }
  
      DBErrors nZapWalletTxRet = CWalletDB(strWalletFile, "cr+").ZapWalletTx(this);
      if (nZapWalletTxRet == DB_NEED_REWRITE) {
          if (CDB::Rewrite(strWalletFile, "\x04pool")) {
              LOCK(cs_wallet);
              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.
          }
      }
  
      if (nZapWalletTxRet != DB_LOAD_OK) {
          return nZapWalletTxRet;
      }
  
      return DB_LOAD_OK;
  }
  
  bool CWallet::SetAddressBookName(const CTxDestination &address, const std::string &strName)
  {
      return SetAddressBookName(CBitcoinAddress(address), strName);
  }
  
  bool CWallet::SetAddressBookName(const CBitcoinAddress &address, const std::string &strName)
  {
      std::map<CBitcoinAddress, std::string>::iterator mi = mapAddressBook.find(address);
      mapAddressBook[address] = strName;
  
      // NotifyAddressBookChanged(this, address, strName, ::IsMine(*this, address) != MINE_NO, (mi == mapAddressBook.end()) ? CT_NEW : CT_UPDATED);
      NotifyAddressBookChanged(this, address, strName, Script_util::IsMine(*this, address) != MINE_NO, (mi == mapAddressBook.end()) ? CT_NEW : CT_UPDATED);
  
      if (! fFileBacked) {
          return false;
      }
      return CWalletDB(strWalletFile).WriteName(address.ToString(), strName);
  }
  
  bool CWallet::DelAddressBookName(const CBitcoinAddress &address)
  {
      mapAddressBook.erase(address);
  
      // NotifyAddressBookChanged(this, address, "", ::IsMine(*this, address) != MINE_NO, CT_DELETED);
      NotifyAddressBookChanged(this, address, "", Script_util::IsMine(*this, address) != MINE_NO, CT_DELETED);
      
      if (! fFileBacked) {
          return false;
      }
      return CWalletDB(strWalletFile).EraseName(address.ToString());
  }
  
  void CWallet::PrintWallet(const CBlock &block)
  {
      {
          LOCK(cs_wallet);
          if (block.IsProofOfStake() && mapWallet.count(block.vtx[1].GetHash())) {
              const CWalletTx &wtx = mapWallet[block.vtx[1].GetHash()];
              printf("    PoS: %d  %d  %" PRId64 "", wtx.GetDepthInMainChain(), wtx.GetBlocksToMaturity(), wtx.GetCredit(MINE_ALL));
          } else if (mapWallet.count(block.vtx[0].GetHash())) {
              const CWalletTx &wtx = mapWallet[block.vtx[0].GetHash()];
              printf("    PoW:  %d  %d  %" PRId64 "", wtx.GetDepthInMainChain(), wtx.GetBlocksToMaturity(), wtx.GetCredit(MINE_ALL));
          }
      }
      printf("\n");
  }
  
  bool CWallet::GetTransaction(const uint256 &hashTx, CWalletTx &wtx)
  {
      {
          LOCK(cs_wallet);
          std::map<uint256, CWalletTx>::iterator mi = mapWallet.find(hashTx);
          if (mi != mapWallet.end()) {
              wtx = (*mi).second;
              return true;
          }
      }
      return false;
  }
  
  bool CWallet::SetDefaultKey(const CPubKey &vchPubKey)
  {
      if (fFileBacked) {
          if (! CWalletDB(strWalletFile).WriteDefaultKey(vchPubKey)) {
              return false;
          }
      }
  
      vchDefaultKey = vchPubKey;
      return true;
  }
  
  //
  // Mark old keypool keys as used,
  // and generate all new keys
  //
  bool CWallet::NewKeyPool(unsigned int nSize)
  {
      {
          LOCK(cs_wallet);
          CWalletDB walletdb(strWalletFile);
          BOOST_FOREACH(int64_t nIndex, setKeyPool)
          {
              walletdb.ErasePool(nIndex);
          }
          setKeyPool.clear();
  
          if (IsLocked()) {
              return false;
          }
  
          uint64_t nKeys;
          if (nSize > 0) {
              nKeys = nSize;
          } else {
              nKeys = std::max<uint64_t>(map_arg::GetArg("-keypool", 100), 0);
          }
  
          for (uint64_t i = 0; i < nKeys; ++i)
          {
              uint64_t nIndex = i+1;
              walletdb.WritePool(nIndex, CKeyPool(GenerateNewKey()));
              setKeyPool.insert(nIndex);
          }
          printf("CWallet::NewKeyPool wrote %" PRIu64 " new keys\n", nKeys);
      }
      return true;
  }
  
  bool CWallet::TopUpKeyPool(unsigned int nSize)
  {
      {
          LOCK(cs_wallet);
  
          if (IsLocked()) {
              return false;
          }
  
          CWalletDB walletdb(strWalletFile);
  
          // Top up key pool
          uint64_t nTargetSize;
          if (nSize > 0) {
              nTargetSize = nSize;
          } else {
              nTargetSize = std::max<uint64_t>(map_arg::GetArg("-keypool", 100), 0);
          }
  
          while (setKeyPool.size() < (nTargetSize + 1))
          {
              uint64_t nEnd = 1;
              if (! setKeyPool.empty()) {
                  nEnd = *(--setKeyPool.end()) + 1;
              }
              if (! walletdb.WritePool(nEnd, CKeyPool(GenerateNewKey()))) {
                  throw std::runtime_error("TopUpKeyPool() : writing generated key failed");
              }
  
              setKeyPool.insert(nEnd);
              printf("keypool added key %" PRIu64 ", size=%" PRIszu "\n", nEnd, setKeyPool.size());
          }
      }
      return true;
  }
  
  void CWallet::ReserveKeyFromKeyPool(int64_t &nIndex, CKeyPool &keypool)
  {
      nIndex = -1;
      keypool.vchPubKey = CPubKey();
      {
          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 std::runtime_error("ReserveKeyFromKeyPool() : read failed");
          }
          if (! HaveKey(keypool.vchPubKey.GetID())) {
              throw std::runtime_error("ReserveKeyFromKeyPool() : unknown key in key pool");
          }
  
          assert(keypool.vchPubKey.IsValid());
          if (args_bool::fDebug && map_arg::GetBoolArg("-printkeypool")) {
              printf("keypool reserve %" PRId64 "\n", nIndex);
          }
      }
  }
  
  int64_t CWallet::AddReserveKey(const CKeyPool &keypool)
  {
      {
          LOCK2(block_process::cs_main, cs_wallet);
          CWalletDB walletdb(strWalletFile);
  
          int64_t nIndex = 1 + *(--setKeyPool.end());
          if (! walletdb.WritePool(nIndex, keypool)) {
              throw std::runtime_error("AddReserveKey() : writing added key failed");
          }
          setKeyPool.insert(nIndex);
          return nIndex;
      }
      return -1;
  }
  
  void CWallet::KeepKey(int64_t nIndex)
  {
      // Remove from key pool
      if (fFileBacked) {
          CWalletDB walletdb(strWalletFile);
          walletdb.ErasePool(nIndex);
      }
      if(args_bool::fDebug) {
          printf("keypool keep %" PRId64 "\n", nIndex);
      }
  }
  
  void CWallet::ReturnKey(int64_t nIndex)
  {
      // Return to key pool
      {
          LOCK(cs_wallet);
          setKeyPool.insert(nIndex);
      }
      if(args_bool::fDebug) {
          printf("keypool return %" PRId64 "\n", nIndex);
      }
  }
  
  bool CWallet::GetKeyFromPool(CPubKey &result, bool fAllowReuse)
  {
      int64_t nIndex = 0;
      CKeyPool keypool;
      {
          LOCK(cs_wallet);
          ReserveKeyFromKeyPool(nIndex, keypool);
          if (nIndex == -1) {
              if (fAllowReuse && vchDefaultKey.IsValid()) {
                  result = vchDefaultKey;
                  return true;
              }
  
              if (IsLocked()) {
                  return false;
              }
  
              result = GenerateNewKey();
              return true;
          }
          KeepKey(nIndex);
          result = keypool.vchPubKey;
      }
      return true;
  }
  
  int64_t CWallet::GetOldestKeyPoolTime()
  {
      int64_t nIndex = 0;
      CKeyPool keypool;
      ReserveKeyFromKeyPool(nIndex, keypool);
      if (nIndex == -1) {
          return bitsystem::GetTime();
      }
  
      ReturnKey(nIndex);
      return keypool.nTime;
  }
  
  std::map<CBitcoinAddress, int64_t> CWallet::GetAddressBalances()
  {
      std::map<CBitcoinAddress, int64_t> balances;
  
      {
          LOCK(cs_wallet);
          BOOST_FOREACH(PAIRTYPE(uint256, CWalletTx) walletEntry, mapWallet)
          {
              CWalletTx *pcoin = &walletEntry.second;
  
              if (!pcoin->IsFinal() || !pcoin->IsTrusted()) {
                  continue;
              }
  
              if ((pcoin->IsCoinBase() || pcoin->IsCoinStake()) && pcoin->GetBlocksToMaturity() > 0) {
                  continue;
              }
  
              int nDepth = pcoin->GetDepthInMainChain();
              if (nDepth < (pcoin->IsFromMe(MINE_ALL) ? 0 : 1)) {
                  continue;
              }
  
              for (unsigned int i = 0; i < pcoin->vout.size(); ++i)
              {
                  CBitcoinAddress addr;
                  if (! IsMine(pcoin->vout[i])) {
                      continue;
                  }
                  if(! Script_util::ExtractAddress(*this, pcoin->vout[i].scriptPubKey, addr)) {
                      continue;
                  }
  
                  int64_t n = pcoin->IsSpent(i) ? 0 : pcoin->vout[i].nValue;
  
                  if (! balances.count(addr)) {
                      balances[addr] = 0;
                  }
                  balances[addr] += n;
              }
          }
      }
  
      return balances;
  }
  
  std::set<std::set<CBitcoinAddress> > CWallet::GetAddressGroupings()
  {
      std::set<std::set<CBitcoinAddress> > groupings;
      std::set<CBitcoinAddress> grouping;
  
      BOOST_FOREACH(PAIRTYPE(uint256, CWalletTx)walletEntry, mapWallet)
      {
          CWalletTx *pcoin = &walletEntry.second;
  
          if (pcoin->vin.size() > 0) {
              bool any_mine = false;
  
              // group all input addresses with each other
              BOOST_FOREACH(CTxIn txin, pcoin->vin)
              {
                  CBitcoinAddress address;
                  if(! IsMine(txin)) {// If this input isn't mine, ignore it
                      continue;
                  }
                  if(! Script_util::ExtractAddress(*this, mapWallet[txin.prevout.hash].vout[txin.prevout.n].scriptPubKey, address)) {
                      continue;
                  }
  
                  grouping.insert(address);
                  any_mine = true;
              }
  
              // group change with input addresses
              if (any_mine) {
                  BOOST_FOREACH(CTxOut txout, pcoin->vout)
                  if (IsChange(txout))
                  {
                      CBitcoinAddress txoutAddr;
                      if(! Script_util::ExtractAddress(*this, txout.scriptPubKey, txoutAddr)) {
                          continue;
                      }
                      grouping.insert(txoutAddr);
                  }
              }
              if (! grouping.empty()) {
                  groupings.insert(grouping);
                  grouping.clear();
              }
          }
  
          // group lone addrs by themselves
          for (unsigned int i = 0; i < pcoin->vout.size(); ++i)
          {
              if (IsMine(pcoin->vout[i])) {
                  CBitcoinAddress address;
                  if(! Script_util::ExtractAddress(*this, pcoin->vout[i].scriptPubKey, address)) {
                      continue;
                  }
  
                  grouping.insert(address);
                  groupings.insert(grouping);
                  grouping.clear();
              }
          }
      }
  
      std::set<std::set<CBitcoinAddress> * > uniqueGroupings;          // a set of pointers to groups of addresses
      std::map<CBitcoinAddress, std::set<CBitcoinAddress> * > setmap;  // map addresses to the unique group containing it
      BOOST_FOREACH(std::set<CBitcoinAddress> grouping, groupings)
      {
          // make a set of all the groups hit by this new group
          std::set<std::set<CBitcoinAddress> * > hits;
          std::map<CBitcoinAddress, std::set<CBitcoinAddress> * >::iterator it;
          BOOST_FOREACH(CBitcoinAddress address, grouping)
          {
              if ((it = setmap.find(address)) != setmap.end()) {
                  hits.insert((*it).second);
              }
          }
  
          // merge all hit groups into a new single group and delete old groups
          std::set<CBitcoinAddress> *merged = new(std::nothrow) std::set<CBitcoinAddress>(grouping);
          if(merged == NULL) {
              throw std::runtime_error("GetAddressGroupings(): Error Memory Allocate Failure.");
          }
  
          BOOST_FOREACH(std::set<CBitcoinAddress> *hit, hits)
          {
              merged->insert(hit->begin(), hit->end());
              uniqueGroupings.erase(hit);
              delete hit;
          }
          uniqueGroupings.insert(merged);
  
          // update setmap
          BOOST_FOREACH(CBitcoinAddress element, *merged)
          {
              setmap[element] = merged;
          }
      }
  
      std::set<std::set<CBitcoinAddress> > ret;
      BOOST_FOREACH(std::set<CBitcoinAddress> *uniqueGrouping, uniqueGroupings)
      {
          ret.insert(*uniqueGrouping);
          delete uniqueGrouping;
      }
  
      return ret;
  }
  
  //
  // ppcoin: check 'spent' consistency between wallet and txindex
  // ppcoin: fix wallet spent state according to txindex
  //
  void CWallet::FixSpentCoins(int &nMismatchFound, int64_t &nBalanceInQuestion, bool fCheckOnly)
  {
      nMismatchFound = 0;
      nBalanceInQuestion = 0;
  
      LOCK(cs_wallet);
  
      std::vector<CWalletTx *> vCoins;
      vCoins.reserve(mapWallet.size());
      for (std::map<uint256, CWalletTx>::iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
      {
          vCoins.push_back(&(*it).second);
      }
  
      CTxDB txdb("r");
      BOOST_FOREACH(CWalletTx *pcoin, vCoins)
      {
          //
          // Find the corresponding transaction index
          //
          CTxIndex txindex;
          if (! txdb.ReadTxIndex(pcoin->GetHash(), txindex)) {
              continue;
          }
  
          for (unsigned int n=0; n < pcoin->vout.size(); ++n)
          {
              if (IsMine(pcoin->vout[n]) && pcoin->IsSpent(n) && (txindex.vSpent.size() <= n || txindex.vSpent[n].IsNull())) {
                  printf("FixSpentCoins found lost coin %sppc %s[%u], %s\n", bitstr::FormatMoney(pcoin->vout[n].nValue).c_str(), pcoin->GetHash().ToString().c_str(), n, fCheckOnly? "repair not attempted" : "repairing");
                  
                  nMismatchFound++;
                  nBalanceInQuestion += pcoin->vout[n].nValue;
                  if (! fCheckOnly) {
                      pcoin->MarkUnspent(n);
                      pcoin->WriteToDisk();
                  }
              } else if (IsMine(pcoin->vout[n]) && !pcoin->IsSpent(n) && (txindex.vSpent.size() > n && !txindex.vSpent[n].IsNull())) {
                  printf("FixSpentCoins found spent coin %sppc %s[%u], %s\n", bitstr::FormatMoney(pcoin->vout[n].nValue).c_str(), pcoin->GetHash().ToString().c_str(), n, fCheckOnly? "repair not attempted" : "repairing");
                  
                  nMismatchFound++;
                  nBalanceInQuestion += pcoin->vout[n].nValue;
                  if (! fCheckOnly) {
                      pcoin->MarkSpent(n);
                      pcoin->WriteToDisk();
                  }
              }
          }
  
          if(IsMine((CTransaction)*pcoin) && (pcoin->IsCoinBase() || pcoin->IsCoinStake()) && pcoin->GetDepthInMainChain() == 0) {
              printf("FixSpentCoins %s tx %s\n", fCheckOnly ? "found" : "removed", pcoin->GetHash().ToString().c_str());
              
              if (! fCheckOnly) {
                  EraseFromWallet(pcoin->GetHash());
              }
          }
      }
  }
  
  //
  // ppcoin: disable transaction (only for coinstake)
  //
  void CWallet::DisableTransaction(const CTransaction &tx)
  {
      if (!tx.IsCoinStake() || !IsFromMe(tx)) {
          return; // only disconnecting coinstake requires marking input unspent
      }
  
      LOCK(cs_wallet);
      BOOST_FOREACH(const CTxIn &txin, tx.vin)
      {
          std::map<uint256, CWalletTx>::iterator mi = mapWallet.find(txin.prevout.hash);
          if (mi != mapWallet.end()) {
              CWalletTx &prev = (*mi).second;
              if (txin.prevout.n < prev.vout.size() && IsMine(prev.vout[txin.prevout.n])) {
                  prev.MarkUnspent(txin.prevout.n);
                  prev.WriteToDisk();
              }
          }
      }
  }
  
  CPubKey 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.IsValid());
      return vchPubKey;
  }
  
  void CReserveKey::KeepKey()
  {
      if (nIndex != -1) {
          pwallet->KeepKey(nIndex);
      }
      nIndex = -1;
      vchPubKey = CPubKey();
  }
  
  void CReserveKey::ReturnKey()
  {
      if (nIndex != -1) {
          pwallet->ReturnKey(nIndex);
      }
      nIndex = -1;
      vchPubKey = CPubKey();
  }
  
  void CWallet::GetAllReserveKeys(std::set<CKeyID> &setAddress) const
  {
      setAddress.clear();
  
      CWalletDB walletdb(strWalletFile);
  
      LOCK2(block_process::cs_main, cs_wallet);
      BOOST_FOREACH(const int64_t &id, setKeyPool)
      {
          CKeyPool keypool;
          if (! walletdb.ReadPool(id, keypool)) {
              throw std::runtime_error("GetAllReserveKeyHashes() : read failed");
          }
  
          assert(keypool.vchPubKey.IsValid());
          CKeyID keyID = keypool.vchPubKey.GetID();
          if (! HaveKey(keyID)) {
              throw std::runtime_error("GetAllReserveKeyHashes() : unknown key in key pool");
          }
          setAddress.insert(keyID);
      }
  }
  
  void CWallet::UpdatedTransaction(const uint256 &hashTx)
  {
      {
          LOCK(cs_wallet);
  
          //
          // Only notify UI if this transaction is in this wallet
          //
          std::map<uint256, CWalletTx>::const_iterator mi = mapWallet.find(hashTx);
          if (mi != mapWallet.end()) {
              NotifyTransactionChanged(this, hashTx, CT_UPDATED);
              vMintingWalletUpdated.push_back(hashTx);
          }
      }
  }
  
  void CWallet::GetAddresses(std::map<CBitcoinAddress, int64_t> &mapAddresses) const
  {
      mapAddresses.clear();
  
      // get birth times for keys with metadata
      for (std::map<CBitcoinAddress, CKeyMetadata>::const_iterator it = mapKeyMetadata.begin(); it != mapKeyMetadata.end(); it++)
      {
          mapAddresses[it->first] = it->second.nCreateTime ? it->second.nCreateTime : 0;
      }
  
      for (std::map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); it++)
      {
          // iterate over all wallet transactions...
          const CWalletTx &wtx = (*it).second;
          if (wtx.hashBlock == 0) {
              continue; // skip unconfirmed transactions
          }
  
          for(std::vector<CTxOut>::const_iterator it2 = wtx.vout.begin(); it2 != wtx.vout.end(); it2++)
          {
              const CTxOut &out = (*it2);
  
              // iterate over all their outputs
              CBitcoinAddress addressRet;
              if (Script_util::ExtractAddress(*this, out.scriptPubKey, addressRet)) {
                  if (mapAddresses.find(addressRet) != mapAddresses.end() && (mapAddresses[addressRet] == 0 || mapAddresses[addressRet] > wtx.nTime)) {
                      mapAddresses[addressRet] = wtx.nTime;
                  }
              } else {
                  // multisig output affects more than one key
                  std::vector<CKeyID> vAffected;
                  Script_util::ExtractAffectedKeys(*this, out.scriptPubKey, vAffected);
  
                  for(std::vector<CKeyID>::const_iterator it3 = vAffected.begin(); it3 != vAffected.end(); it3++)
                  {
                      CBitcoinAddress addrAffected(*it3);
                      if (mapAddresses.find(addrAffected) != mapAddresses.end() && (mapAddresses[addrAffected] == 0 || mapAddresses[addrAffected] > wtx.nTime)) {
                          mapAddresses[addrAffected] = wtx.nTime;
                      }
                  }
                  vAffected.clear();
              }
          }
      }
  }
  
  void CWallet::ClearOrphans()
  {
      std::list<uint256> orphans;
  
      LOCK(cs_wallet);
      for(std::map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
      {
          const CWalletTx *wtx = &(*it).second;
          if((wtx->IsCoinBase() || wtx->IsCoinStake()) && !wtx->IsInMainChain()) {
              orphans.push_back(wtx->GetHash());
          }
      }
  
      for(std::list<uint256>::const_iterator it = orphans.begin(); it != orphans.end(); ++it)
      {
          EraseFromWallet(*it);
      }
  }
  