text: // Copyright (c) 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 "base58.h"
  #include "rpcserver.h"
  #include "init.h"
  #include "net.h"
  #include "netbase.h"
  #include "timedata.h"
  #include "util.h"
  #include "wallet.h"
  #include "walletdb.h"
  
  using namespace std;
  using namespace json_spirit;
  
  int64_t nWalletUnlockTime;
  static CCriticalSection cs_nWalletUnlockTime;
  
  extern void TxToJSON(const CTransaction& tx, const uint256 hashBlock, json_spirit::Object& entry);
  
  static void accountingDeprecationCheck()
  {
      if (!GetBoolArg("-enableaccounts", false))
          throw runtime_error(
              "Accounting API is deprecated and will be removed in future.\n"
              "It can easily result in negative or odd balances if misused or misunderstood, which has happened in the field.\n"
              "If you still want to enable it, add to your config file enableaccounts=1\n");
  
      if (GetBoolArg("-staking", true))
          throw runtime_error("If you want to use accounting API, staking must be disabled, add to your config file staking=0\n");
  }
  
  std::string HelpRequiringPassphrase()
  {
      return pwalletMain && pwalletMain->IsCrypted()
          ? "\nrequires wallet passphrase to be set with walletpassphrase first"
          : "";
  }
  
  void EnsureWalletIsUnlocked()
  {
      if (pwalletMain->IsLocked())
          throw JSONRPCError(RPC_WALLET_UNLOCK_NEEDED, "Error: Please enter the wallet passphrase with walletpassphrase first.");
      if (fWalletUnlockStakingOnly)
          throw JSONRPCError(RPC_WALLET_UNLOCK_NEEDED, "Error: Wallet is unlocked for staking only.");
  }
  
  void WalletTxToJSON(const CWalletTx& wtx, Object& entry)
  {
      int confirms = wtx.GetDepthInMainChain();
      entry.push_back(Pair("confirmations", confirms));
      if (wtx.IsCoinBase() || wtx.IsCoinStake())
          entry.push_back(Pair("generated", true));
      if (confirms > 0)
      {
          entry.push_back(Pair("blockhash", wtx.hashBlock.GetHex()));
          entry.push_back(Pair("blockindex", wtx.nIndex));
          entry.push_back(Pair("blocktime", (int64_t)(mapBlockIndex[wtx.hashBlock]->nTime)));
      }
      entry.push_back(Pair("txid", wtx.GetHash().GetHex()));
      entry.push_back(Pair("time", (int64_t)wtx.GetTxTime()));
      entry.push_back(Pair("timereceived", (int64_t)wtx.nTimeReceived));
      BOOST_FOREACH(const PAIRTYPE(string,string)& item, wtx.mapValue)
          entry.push_back(Pair(item.first, item.second));
  }
  
  string AccountFromValue(const Value& value)
  {
      string strAccount = value.get_str();
      if (strAccount == "*")
          throw JSONRPCError(RPC_WALLET_INVALID_ACCOUNT_NAME, "Invalid account name");
      return strAccount;
  }
  
  
  Value getnewpubkey(const Array& params, bool fHelp)
  {
      if (fHelp || params.size() > 1)
          throw runtime_error(
              "getnewpubkey [account]\n"
              "Returns new public key for coinbase generation.");
  
      // Parse the account first so we don't generate a key if there's an error
      string strAccount;
      if (params.size() > 0)
          strAccount = AccountFromValue(params[0]);
  
      if (!pwalletMain->IsLocked())
          pwalletMain->TopUpKeyPool();
  
      // Generate a new key that is added to wallet
      CPubKey newKey;
      if (!pwalletMain->GetKeyFromPool(newKey))
          throw JSONRPCError(RPC_WALLET_KEYPOOL_RAN_OUT, "Error: Keypool ran out, please call keypoolrefill first");
      CKeyID keyID = newKey.GetID();
  
      pwalletMain->SetAddressBookName(keyID, strAccount);
  
      return HexStr(newKey.begin(), newKey.end());
  }
  
  
  Value getnewaddress(const Array& params, bool fHelp)
  {
      if (fHelp || params.size() > 1)
          throw runtime_error(
              "getnewaddress [account]\n"
              "Returns a new Vroomcoin address for receiving payments.  "
              "If [account] is specified, it is added to the address book "
              "so payments received with the address will be credited to [account].");
  
      // Parse the account first so we don't generate a key if there's an error
      string strAccount;
      if (params.size() > 0)
          strAccount = AccountFromValue(params[0]);
  
      if (!pwalletMain->IsLocked())
          pwalletMain->TopUpKeyPool();
  
      // Generate a new key that is added to wallet
      CPubKey newKey;
      if (!pwalletMain->GetKeyFromPool(newKey))
          throw JSONRPCError(RPC_WALLET_KEYPOOL_RAN_OUT, "Error: Keypool ran out, please call keypoolrefill first");
      CKeyID keyID = newKey.GetID();
  
      pwalletMain->SetAddressBookName(keyID, strAccount);
  
      return CBitcoinAddress(keyID).ToString();
  }
  
  
  CBitcoinAddress GetAccountAddress(string strAccount, bool bForceNew=false)
  {
      CWalletDB walletdb(pwalletMain->strWalletFile);
  
      CAccount account;
      walletdb.ReadAccount(strAccount, account);
  
      bool bKeyUsed = false;
  
      // Check if the current key has been used
      if (account.vchPubKey.IsValid())
      {
          CScript scriptPubKey;
          scriptPubKey.SetDestination(account.vchPubKey.GetID());
          for (map<uint256, CWalletTx>::iterator it = pwalletMain->mapWallet.begin();
               it != pwalletMain->mapWallet.end() && account.vchPubKey.IsValid();
               ++it)
          {
              const CWalletTx& wtx = (*it).second;
              BOOST_FOREACH(const CTxOut& txout, wtx.vout)
                  if (txout.scriptPubKey == scriptPubKey)
                      bKeyUsed = true;
          }
      }
  
      // Generate a new key
      if (!account.vchPubKey.IsValid() || bForceNew || bKeyUsed)
      {
          if (!pwalletMain->GetKeyFromPool(account.vchPubKey))
              throw JSONRPCError(RPC_WALLET_KEYPOOL_RAN_OUT, "Error: Keypool ran out, please call keypoolrefill first");
  
          pwalletMain->SetAddressBookName(account.vchPubKey.GetID(), strAccount);
          walletdb.WriteAccount(strAccount, account);
      }
  
      return CBitcoinAddress(account.vchPubKey.GetID());
  }
  
  Value getaccountaddress(const Array& params, bool fHelp)
  {
      if (fHelp || params.size() != 1)
          throw runtime_error(
              "getaccountaddress <account>\n"
              "Returns the current Vroomcoin address for receiving payments to this account.");
  
      // Parse the account first so we don't generate a key if there's an error
      string strAccount = AccountFromValue(params[0]);
  
      Value ret;
  
      ret = GetAccountAddress(strAccount).ToString();
  
      return ret;
  }
  
  
  
  Value setaccount(const Array& params, bool fHelp)
  {
      if (fHelp || params.size() < 1 || params.size() > 2)
          throw runtime_error(
              "setaccount <vroomcoinaddress> <account>\n"
              "Sets the account associated with the given address.");
  
      CBitcoinAddress address(params[0].get_str());
      if (!address.IsValid())
          throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid Vroomcoin address");
  
  
      string strAccount;
      if (params.size() > 1)
          strAccount = AccountFromValue(params[1]);
  
      // Detect when changing the account of an address that is the 'unused current key' of another account:
      if (pwalletMain->mapAddressBook.count(address.Get()))
      {
          string strOldAccount = pwalletMain->mapAddressBook[address.Get()];
          if (address == GetAccountAddress(strOldAccount))
              GetAccountAddress(strOldAccount, true);
      }
  
      pwalletMain->SetAddressBookName(address.Get(), strAccount);
  
      return Value::null;
  }
  
  
  Value getaccount(const Array& params, bool fHelp)
  {
      if (fHelp || params.size() != 1)
          throw runtime_error(
              "getaccount <vroomcoinaddress>\n"
              "Returns the account associated with the given address.");
  
      CBitcoinAddress address(params[0].get_str());
      if (!address.IsValid())
          throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid Vroomcoin address");
  
      string strAccount;
      map<CTxDestination, string>::iterator mi = pwalletMain->mapAddressBook.find(address.Get());
      if (mi != pwalletMain->mapAddressBook.end() && !(*mi).second.empty())
          strAccount = (*mi).second;
      return strAccount;
  }
  
  
  Value getaddressesbyaccount(const Array& params, bool fHelp)
  {
      if (fHelp || params.size() != 1)
          throw runtime_error(
              "getaddressesbyaccount <account>\n"
              "Returns the list of addresses for the given account.");
  
      string strAccount = AccountFromValue(params[0]);
  
      // Find all addresses that have the given account
      Array ret;
      BOOST_FOREACH(const PAIRTYPE(CBitcoinAddress, string)& item, pwalletMain->mapAddressBook)
      {
          const CBitcoinAddress& address = item.first;
          const string& strName = item.second;
          if (strName == strAccount)
              ret.push_back(address.ToString());
      }
      return ret;
  }
  
  Value sendtoaddress(const Array& params, bool fHelp)
  {
      if (fHelp || params.size() < 2 || params.size() > 4)
          throw runtime_error(
              "sendtoaddress <vroomcoinaddress> <amount> [comment] [comment-to]\n"
              "<amount> is a real and is rounded to the nearest 0.000001"
              + HelpRequiringPassphrase());
  
      CBitcoinAddress address(params[0].get_str());
      if (!address.IsValid())
          throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid Vroomcoin address");
  
      // Amount
      int64_t nAmount = AmountFromValue(params[1]);
  
      // Wallet comments
      CWalletTx wtx;
      if (params.size() > 2 && params[2].type() != null_type && !params[2].get_str().empty())
          wtx.mapValue["comment"] = params[2].get_str();
      if (params.size() > 3 && params[3].type() != null_type && !params[3].get_str().empty())
          wtx.mapValue["to"]      = params[3].get_str();
  
      if (pwalletMain->IsLocked())
          throw JSONRPCError(RPC_WALLET_UNLOCK_NEEDED, "Error: Please enter the wallet passphrase with walletpassphrase first.");
  
      string strError = pwalletMain->SendMoneyToDestination(address.Get(), nAmount, wtx);
      if (strError != "")
          throw JSONRPCError(RPC_WALLET_ERROR, strError);
  
      return wtx.GetHash().GetHex();
  }
  
  Value listaddressgroupings(const Array& params, bool fHelp)
  {
      if (fHelp)
          throw runtime_error(
              "listaddressgroupings\n"
              "Lists groups of addresses which have had their common ownership\n"
              "made public by common use as inputs or as the resulting change\n"
              "in past transactions");
  
      Array jsonGroupings;
      map<CTxDestination, int64_t> balances = pwalletMain->GetAddressBalances();
      BOOST_FOREACH(set<CTxDestination> grouping, pwalletMain->GetAddressGroupings())
      {
          Array jsonGrouping;
          BOOST_FOREACH(CTxDestination address, grouping)
          {
              Array addressInfo;
              addressInfo.push_back(CBitcoinAddress(address).ToString());
              addressInfo.push_back(ValueFromAmount(balances[address]));
              {
                  LOCK(pwalletMain->cs_wallet);
                  if (pwalletMain->mapAddressBook.find(CBitcoinAddress(address).Get()) != pwalletMain->mapAddressBook.end())
                      addressInfo.push_back(pwalletMain->mapAddressBook.find(CBitcoinAddress(address).Get())->second);
              }
              jsonGrouping.push_back(addressInfo);
          }
          jsonGroupings.push_back(jsonGrouping);
      }
      return jsonGroupings;
  }
  
  Value signmessage(const Array& params, bool fHelp)
  {
      if (fHelp || params.size() != 2)
          throw runtime_error(
              "signmessage <vroomcoinaddress> <message>\n"
              "Sign a message with the private key of an address");
  
      EnsureWalletIsUnlocked();
  
      string strAddress = params[0].get_str();
      string strMessage = params[1].get_str();
  
      CBitcoinAddress addr(strAddress);
      if (!addr.IsValid())
          throw JSONRPCError(RPC_TYPE_ERROR, "Invalid address");
  
      CKeyID keyID;
      if (!addr.GetKeyID(keyID))
          throw JSONRPCError(RPC_TYPE_ERROR, "Address does not refer to key");
  
      CKey key;
      if (!pwalletMain->GetKey(keyID, key))
          throw JSONRPCError(RPC_WALLET_ERROR, "Private key not available");
  
      CHashWriter ss(SER_GETHASH, 0);
      ss << strMessageMagic;
      ss << strMessage;
  
      vector<unsigned char> vchSig;
      if (!key.SignCompact(ss.GetHash(), vchSig))
          throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Sign failed");
  
      return EncodeBase64(&vchSig[0], vchSig.size());
  }
  
  Value getreceivedbyaddress(const Array& params, bool fHelp)
  {
      if (fHelp || params.size() < 1 || params.size() > 2)
          throw runtime_error(
              "getreceivedbyaddress <vroomcoinaddress> [minconf=1]\n"
              "Returns the total amount received by <vroomcoinaddress> in transactions with at least [minconf] confirmations.");
  
      // Bitcoin address
      CBitcoinAddress address = CBitcoinAddress(params[0].get_str());
      CScript scriptPubKey;
      if (!address.IsValid())
          throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid Vroomcoin address");
      scriptPubKey.SetDestination(address.Get());
      if (!IsMine(*pwalletMain,scriptPubKey))
          return (double)0.0;
  
      // Minimum confirmations
      int nMinDepth = 1;
      if (params.size() > 1)
          nMinDepth = params[1].get_int();
  
      // Tally
      int64_t nAmount = 0;
      for (map<uint256, CWalletTx>::iterator it = pwalletMain->mapWallet.begin(); it != pwalletMain->mapWallet.end(); ++it)
      {
          const CWalletTx& wtx = (*it).second;
          if (wtx.IsCoinBase() || wtx.IsCoinStake() || !IsFinalTx(wtx))
              continue;
  
          BOOST_FOREACH(const CTxOut& txout, wtx.vout)
              if (txout.scriptPubKey == scriptPubKey)
                  if (wtx.GetDepthInMainChain() >= nMinDepth)
                      nAmount += txout.nValue;
      }
  
      return  ValueFromAmount(nAmount);
  }
  
  
  void GetAccountAddresses(string strAccount, set<CTxDestination>& setAddress)
  {
      BOOST_FOREACH(const PAIRTYPE(CTxDestination, string)& item, pwalletMain->mapAddressBook)
      {
          const CTxDestination& address = item.first;
          const string& strName = item.second;
          if (strName == strAccount)
              setAddress.insert(address);
      }
  }
  
  Value getreceivedbyaccount(const Array& params, bool fHelp)
  {
      if (fHelp || params.size() < 1 || params.size() > 2)
          throw runtime_error(
              "getreceivedbyaccount <account> [minconf=1]\n"
              "Returns the total amount received by addresses with <account> in transactions with at least [minconf] confirmations.");
  
      accountingDeprecationCheck();
  
      // Minimum confirmations
      int nMinDepth = 1;
      if (params.size() > 1)
          nMinDepth = params[1].get_int();
  
      // Get the set of pub keys assigned to account
      string strAccount = AccountFromValue(params[0]);
      set<CTxDestination> setAddress;
      GetAccountAddresses(strAccount, setAddress);
  
      // Tally
      int64_t nAmount = 0;
      for (map<uint256, CWalletTx>::iterator it = pwalletMain->mapWallet.begin(); it != pwalletMain->mapWallet.end(); ++it)
      {
          const CWalletTx& wtx = (*it).second;
          if (wtx.IsCoinBase() || wtx.IsCoinStake() || !IsFinalTx(wtx))
              continue;
  
          BOOST_FOREACH(const CTxOut& txout, wtx.vout)
          {
              CTxDestination address;
              if (ExtractDestination(txout.scriptPubKey, address) && IsMine(*pwalletMain, address) && setAddress.count(address))
                  if (wtx.GetDepthInMainChain() >= nMinDepth)
                      nAmount += txout.nValue;
          }
      }
  
      return (double)nAmount / (double)COIN;
  }
  
  
  int64_t GetAccountBalance(CWalletDB& walletdb, const string& strAccount, int nMinDepth)
  {
      int64_t nBalance = 0;
  
      // Tally wallet transactions
      for (map<uint256, CWalletTx>::iterator it = pwalletMain->mapWallet.begin(); it != pwalletMain->mapWallet.end(); ++it)
      {
          const CWalletTx& wtx = (*it).second;
          if (!IsFinalTx(wtx) || wtx.GetDepthInMainChain() < 0)
              continue;
  
          int64_t nReceived, nSent, nFee;
          wtx.GetAccountAmounts(strAccount, nReceived, nSent, nFee);
  
          if (nReceived != 0 && wtx.GetDepthInMainChain() >= nMinDepth && wtx.GetBlocksToMaturity() == 0)
              nBalance += nReceived;
          nBalance -= nSent + nFee;
      }
  
      // Tally internal accounting entries
      nBalance += walletdb.GetAccountCreditDebit(strAccount);
  
      return nBalance;
  }
  
  int64_t GetAccountBalance(const string& strAccount, int nMinDepth)
  {
      CWalletDB walletdb(pwalletMain->strWalletFile);
      return GetAccountBalance(walletdb, strAccount, nMinDepth);
  }
  
  
  Value getbalance(const Array& params, bool fHelp)
  {
      if (fHelp || params.size() > 2)
          throw runtime_error(
              "getbalance [account] [minconf=1]\n"
              "If [account] is not specified, returns the server's total available balance.\n"
              "If [account] is specified, returns the balance in the account.");
  
      if (params.size() == 0)
          return  ValueFromAmount(pwalletMain->GetBalance());
  
      int nMinDepth = 1;
      if (params.size() > 1)
          nMinDepth = params[1].get_int();
  
      if (params[0].get_str() == "*") {
          // Calculate total balance a different way from GetBalance()
          // (GetBalance() sums up all unspent TxOuts)
          // getbalance and getbalance '*' 0 should return the same number.
          int64_t nBalance = 0;
          for (map<uint256, CWalletTx>::iterator it = pwalletMain->mapWallet.begin(); it != pwalletMain->mapWallet.end(); ++it)
          {
              const CWalletTx& wtx = (*it).second;
              if (!wtx.IsTrusted())
                  continue;
  
              int64_t allFee;
              string strSentAccount;
              list<pair<CTxDestination, int64_t> > listReceived;
              list<pair<CTxDestination, int64_t> > listSent;
              wtx.GetAmounts(listReceived, listSent, allFee, strSentAccount);
              if (wtx.GetDepthInMainChain() >= nMinDepth && wtx.GetBlocksToMaturity() == 0)
              {
                  BOOST_FOREACH(const PAIRTYPE(CTxDestination,int64_t)& r, listReceived)
                      nBalance += r.second;
              }
              BOOST_FOREACH(const PAIRTYPE(CTxDestination,int64_t)& r, listSent)
                  nBalance -= r.second;
              nBalance -= allFee;
          }
          return  ValueFromAmount(nBalance);
      }
  
      accountingDeprecationCheck();
  
      string strAccount = AccountFromValue(params[0]);
  
      int64_t nBalance = GetAccountBalance(strAccount, nMinDepth);
  
      return ValueFromAmount(nBalance);
  }
  
  
  Value movecmd(const Array& params, bool fHelp)
  {
      if (fHelp || params.size() < 3 || params.size() > 5)
          throw runtime_error(
              "move <fromaccount> <toaccount> <amount> [minconf=1] [comment]\n"
              "Move from one account in your wallet to another.");
  
      accountingDeprecationCheck();
  
      string strFrom = AccountFromValue(params[0]);
      string strTo = AccountFromValue(params[1]);
      int64_t nAmount = AmountFromValue(params[2]);
  
      if (params.size() > 3)
          // unused parameter, used to be nMinDepth, keep type-checking it though
          (void)params[3].get_int();
      string strComment;
      if (params.size() > 4)
          strComment = params[4].get_str();
  
      CWalletDB walletdb(pwalletMain->strWalletFile);
      if (!walletdb.TxnBegin())
          throw JSONRPCError(RPC_DATABASE_ERROR, "database error");
  
      int64_t nNow = GetAdjustedTime();
  
      // Debit
      CAccountingEntry debit;
      debit.nOrderPos = pwalletMain->IncOrderPosNext(&walletdb);
      debit.strAccount = strFrom;
      debit.nCreditDebit = -nAmount;
      debit.nTime = nNow;
      debit.strOtherAccount = strTo;
      debit.strComment = strComment;
      walletdb.WriteAccountingEntry(debit);
  
      // Credit
      CAccountingEntry credit;
      credit.nOrderPos = pwalletMain->IncOrderPosNext(&walletdb);
      credit.strAccount = strTo;
      credit.nCreditDebit = nAmount;
      credit.nTime = nNow;
      credit.strOtherAccount = strFrom;
      credit.strComment = strComment;
      walletdb.WriteAccountingEntry(credit);
  
      if (!walletdb.TxnCommit())
          throw JSONRPCError(RPC_DATABASE_ERROR, "database error");
  
      return true;
  }
  
  
  Value sendfrom(const Array& params, bool fHelp)
  {
      if (fHelp || params.size() < 3 || params.size() > 6)
          throw runtime_error(
              "sendfrom <fromaccount> <tovroomcoinaddress> <amount> [minconf=1] [comment] [comment-to]\n"
              "<amount> is a real and is rounded to the nearest 0.000001"
              + HelpRequiringPassphrase());
  
      string strAccount = AccountFromValue(params[0]);
      CBitcoinAddress address(params[1].get_str());
      if (!address.IsValid())
          throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid Vroomcoin address");
      int64_t nAmount = AmountFromValue(params[2]);
  
      int nMinDepth = 1;
      if (params.size() > 3)
          nMinDepth = params[3].get_int();
  
      CWalletTx wtx;
      wtx.strFromAccount = strAccount;
      if (params.size() > 4 && params[4].type() != null_type && !params[4].get_str().empty())
          wtx.mapValue["comment"] = params[4].get_str();
      if (params.size() > 5 && params[5].type() != null_type && !params[5].get_str().empty())
          wtx.mapValue["to"]      = params[5].get_str();
  
      EnsureWalletIsUnlocked();
  
      // Check funds
      int64_t nBalance = GetAccountBalance(strAccount, nMinDepth);
      if (nAmount > nBalance)
          throw JSONRPCError(RPC_WALLET_INSUFFICIENT_FUNDS, "Account has insufficient funds");
  
      // Send
      string strError = pwalletMain->SendMoneyToDestination(address.Get(), nAmount, wtx);
      if (strError != "")
          throw JSONRPCError(RPC_WALLET_ERROR, strError);
  
      return wtx.GetHash().GetHex();
  }
  
  
  Value sendmany(const Array& params, bool fHelp)
  {
      if (fHelp || params.size() < 2 || params.size() > 4)
          throw runtime_error(
              "sendmany <fromaccount> {address:amount,...} [minconf=1] [comment]\n"
              "amounts are double-precision floating point numbers"
              + HelpRequiringPassphrase());
  
      string strAccount = AccountFromValue(params[0]);
      Object sendTo = params[1].get_obj();
      int nMinDepth = 1;
      if (params.size() > 2)
          nMinDepth = params[2].get_int();
  
      CWalletTx wtx;
      wtx.strFromAccount = strAccount;
      if (params.size() > 3 && params[3].type() != null_type && !params[3].get_str().empty())
          wtx.mapValue["comment"] = params[3].get_str();
  
      set<CBitcoinAddress> setAddress;
      vector<pair<CScript, int64_t> > vecSend;
  
      int64_t totalAmount = 0;
      BOOST_FOREACH(const Pair& s, sendTo)
      {
          CBitcoinAddress address(s.name_);
          if (!address.IsValid())
              throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, string("Invalid Vroomcoin address: ")+s.name_);
  
          if (setAddress.count(address))
              throw JSONRPCError(RPC_INVALID_PARAMETER, string("Invalid parameter, duplicated address: ")+s.name_);
          setAddress.insert(address);
  
          CScript scriptPubKey;
          scriptPubKey.SetDestination(address.Get());
          int64_t nAmount = AmountFromValue(s.value_);
  
          totalAmount += nAmount;
  
          vecSend.push_back(make_pair(scriptPubKey, nAmount));
      }
  
      EnsureWalletIsUnlocked();
  
      // Check funds
      int64_t nBalance = GetAccountBalance(strAccount, nMinDepth);
      if (totalAmount > nBalance)
          throw JSONRPCError(RPC_WALLET_INSUFFICIENT_FUNDS, "Account has insufficient funds");
  
      // Send
      CReserveKey keyChange(pwalletMain);
      int64_t nFeeRequired = 0;
      bool fCreated = pwalletMain->CreateTransaction(vecSend, wtx, keyChange, nFeeRequired);
      if (!fCreated)
      {
          if (totalAmount + nFeeRequired > pwalletMain->GetBalance())
              throw JSONRPCError(RPC_WALLET_INSUFFICIENT_FUNDS, "Insufficient funds");
          throw JSONRPCError(RPC_WALLET_ERROR, "Transaction creation failed");
      }
      if (!pwalletMain->CommitTransaction(wtx, keyChange))
          throw JSONRPCError(RPC_WALLET_ERROR, "Transaction commit failed");
  
      return wtx.GetHash().GetHex();
  }
  
  Value addmultisigaddress(const Array& params, bool fHelp)
  {
      if (fHelp || params.size() < 2 || params.size() > 3)
      {
          string msg = "addmultisigaddress <nrequired> <'[\"key\",\"key\"]'> [account]\n"
              "Add a nrequired-to-sign multisignature address to the wallet\"\n"
              "each key is a Vroomcoin address or hex-encoded public key\n"
              "If [account] is specified, assign address to [account].";
          throw runtime_error(msg);
      }
  
      int nRequired = params[0].get_int();
      const Array& keys = params[1].get_array();
      string strAccount;
      if (params.size() > 2)
          strAccount = AccountFromValue(params[2]);
  
      // Gather public keys
      if (nRequired < 1)
          throw runtime_error("a multisignature address must require at least one key to redeem");
      if ((int)keys.size() < nRequired)
          throw runtime_error(
              strprintf("not enough keys supplied "
                        "(got %u keys, but need at least %d to redeem)", keys.size(), nRequired));
      std::vector<CPubKey> pubkeys;
      pubkeys.resize(keys.size());
      for (unsigned int i = 0; i < keys.size(); i++)
      {
          const std::string& ks = keys[i].get_str();
  
          // Case 1: Bitcoin address and we have full public key:
          CBitcoinAddress address(ks);
          if (pwalletMain && address.IsValid())
          {
              CKeyID keyID;
              if (!address.GetKeyID(keyID))
                  throw runtime_error(
                      strprintf("%s does not refer to a key",ks));
              CPubKey vchPubKey;
              if (!pwalletMain->GetPubKey(keyID, vchPubKey))
                  throw runtime_error(
                      strprintf("no full public key for address %s",ks));
              if (!vchPubKey.IsFullyValid())
                  throw runtime_error(" Invalid public key: "+ks);
              pubkeys[i] = vchPubKey;
          }
  
          // Case 2: hex public key
          else if (IsHex(ks))
          {
              CPubKey vchPubKey(ParseHex(ks));
              if (!vchPubKey.IsFullyValid())
                  throw runtime_error(" Invalid public key: "+ks);
              pubkeys[i] = vchPubKey;
          }
          else
          {
              throw runtime_error(" Invalid public key: "+ks);
          }
      }
  
      // Construct using pay-to-script-hash:
      CScript inner;
      inner.SetMultisig(nRequired, pubkeys);
      CScriptID innerID = inner.GetID();
      if (!pwalletMain->AddCScript(inner))
          throw runtime_error("AddCScript() failed");
  
      pwalletMain->SetAddressBookName(innerID, strAccount);
      return CBitcoinAddress(innerID).ToString();
  }
  
  Value addredeemscript(const Array& params, bool fHelp)
  {
      if (fHelp || params.size() < 1 || params.size() > 2)
      {
          string msg = "addredeemscript <redeemScript> [account]\n"
              "Add a P2SH address with a specified redeemScript to the wallet.\n"
              "If [account] is specified, assign address to [account].";
          throw runtime_error(msg);
      }
  
      string strAccount;
      if (params.size() > 1)
          strAccount = AccountFromValue(params[1]);
  
      // Construct using pay-to-script-hash:
      vector<unsigned char> innerData = ParseHexV(params[0], "redeemScript");
      CScript inner(innerData.begin(), innerData.end());
      CScriptID innerID = inner.GetID();
      if (!pwalletMain->AddCScript(inner))
          throw runtime_error("AddCScript() failed");
  
      pwalletMain->SetAddressBookName(innerID, strAccount);
      return CBitcoinAddress(innerID).ToString();
  }
  
  struct tallyitem
  {
      int64_t nAmount;
      int nConf;
      tallyitem()
      {
          nAmount = 0;
          nConf = std::numeric_limits<int>::max();
      }
  };
  
  Value ListReceived(const Array& params, bool fByAccounts)
  {
      // Minimum confirmations
      int nMinDepth = 1;
      if (params.size() > 0)
          nMinDepth = params[0].get_int();
  
      // Whether to include empty accounts
      bool fIncludeEmpty = false;
      if (params.size() > 1)
          fIncludeEmpty = params[1].get_bool();
  
      // Tally
      map<CBitcoinAddress, tallyitem> mapTally;
      for (map<uint256, CWalletTx>::iterator it = pwalletMain->mapWallet.begin(); it != pwalletMain->mapWallet.end(); ++it)
      {
          const CWalletTx& wtx = (*it).second;
  
          if (wtx.IsCoinBase() || wtx.IsCoinStake() || !IsFinalTx(wtx))
              continue;
  
          int nDepth = wtx.GetDepthInMainChain();
          if (nDepth < nMinDepth)
              continue;
  
          BOOST_FOREACH(const CTxOut& txout, wtx.vout)
          {
              CTxDestination address;
              if (!ExtractDestination(txout.scriptPubKey, address) || !IsMine(*pwalletMain, address))
                  continue;
  
              tallyitem& item = mapTally[address];
              item.nAmount += txout.nValue;
              item.nConf = min(item.nConf, nDepth);
          }
      }
  
      // Reply
      Array ret;
      map<string, tallyitem> mapAccountTally;
      BOOST_FOREACH(const PAIRTYPE(CBitcoinAddress, string)& item, pwalletMain->mapAddressBook)
      {
          const CBitcoinAddress& address = item.first;
          const string& strAccount = item.second;
          map<CBitcoinAddress, tallyitem>::iterator it = mapTally.find(address);
          if (it == mapTally.end() && !fIncludeEmpty)
              continue;
  
          int64_t nAmount = 0;
          int nConf = std::numeric_limits<int>::max();
          if (it != mapTally.end())
          {
              nAmount = (*it).second.nAmount;
              nConf = (*it).second.nConf;
          }
  
          if (fByAccounts)
          {
              tallyitem& item = mapAccountTally[strAccount];
              item.nAmount += nAmount;
              item.nConf = min(item.nConf, nConf);
          }
          else
          {
              Object obj;
              obj.push_back(Pair("address",       address.ToString()));
              obj.push_back(Pair("account",       strAccount));
              obj.push_back(Pair("amount",        ValueFromAmount(nAmount)));
              obj.push_back(Pair("confirmations", (nConf == std::numeric_limits<int>::max() ? 0 : nConf)));
              ret.push_back(obj);
          }
      }
  
      if (fByAccounts)
      {
          for (map<string, tallyitem>::iterator it = mapAccountTally.begin(); it != mapAccountTally.end(); ++it)
          {
              int64_t nAmount = (*it).second.nAmount;
              int nConf = (*it).second.nConf;
              Object obj;
              obj.push_back(Pair("account",       (*it).first));
              obj.push_back(Pair("amount",        ValueFromAmount(nAmount)));
              obj.push_back(Pair("confirmations", (nConf == std::numeric_limits<int>::max() ? 0 : nConf)));
              ret.push_back(obj);
          }
      }
  
      return ret;
  }
  
  Value listreceivedbyaddress(const Array& params, bool fHelp)
  {
      if (fHelp || params.size() > 2)
          throw runtime_error(
              "listreceivedbyaddress [minconf=1] [includeempty=false]\n"
              "[minconf] is the minimum number of confirmations before payments are included.\n"
              "[includeempty] whether to include addresses that haven't received any payments.\n"
              "Returns an array of objects containing:\n"
              "  \"address\" : receiving address\n"
              "  \"account\" : the account of the receiving address\n"
              "  \"amount\" : total amount received by the address\n"
              "  \"confirmations\" : number of confirmations of the most recent transaction included");
  
      return ListReceived(params, false);
  }
  
  Value listreceivedbyaccount(const Array& params, bool fHelp)
  {
      if (fHelp || params.size() > 2)
          throw runtime_error(
              "listreceivedbyaccount [minconf=1] [includeempty=false]\n"
              "[minconf] is the minimum number of confirmations before payments are included.\n"
              "[includeempty] whether to include accounts that haven't received any payments.\n"
              "Returns an array of objects containing:\n"
              "  \"account\" : the account of the receiving addresses\n"
              "  \"amount\" : total amount received by addresses with this account\n"
              "  \"confirmations\" : number of confirmations of the most recent transaction included");
  
      accountingDeprecationCheck();
  
      return ListReceived(params, true);
  }
  
  static void MaybePushAddress(Object & entry, const CTxDestination &dest)
  {
      CBitcoinAddress addr;
      if (addr.Set(dest))
          entry.push_back(Pair("address", addr.ToString()));
  }
  
  void ListTransactions(const CWalletTx& wtx, const string& strAccount, int nMinDepth, bool fLong, Array& ret)
  {
      int64_t nFee;
      string strSentAccount;
      list<pair<CTxDestination, int64_t> > listReceived;
      list<pair<CTxDestination, int64_t> > listSent;
  
      wtx.GetAmounts(listReceived, listSent, nFee, strSentAccount);
  
      bool fAllAccounts = (strAccount == string("*"));
  
      // Sent
      if ((!wtx.IsCoinStake()) && (!listSent.empty() || nFee != 0) && (fAllAccounts || strAccount == strSentAccount))
      {
          BOOST_FOREACH(const PAIRTYPE(CTxDestination, int64_t)& s, listSent)
          {
              Object entry;
              entry.push_back(Pair("account", strSentAccount));
              MaybePushAddress(entry, s.first);
              entry.push_back(Pair("category", "send"));
              entry.push_back(Pair("amount", ValueFromAmount(-s.second)));
              entry.push_back(Pair("fee", ValueFromAmount(-nFee)));
              if (fLong)
                  WalletTxToJSON(wtx, entry);
              ret.push_back(entry);
          }
      }
  
      // Received
      if (listReceived.size() > 0 && wtx.GetDepthInMainChain() >= nMinDepth)
      {
          bool stop = false;
          BOOST_FOREACH(const PAIRTYPE(CTxDestination, int64_t)& r, listReceived)
          {
              string account;
              if (pwalletMain->mapAddressBook.count(r.first))
                  account = pwalletMain->mapAddressBook[r.first];
              if (fAllAccounts || (account == strAccount))
              {
                  Object entry;
                  entry.push_back(Pair("account", account));
                  MaybePushAddress(entry, r.first);
                  if (wtx.IsCoinBase() || wtx.IsCoinStake())
                  {
                      if (wtx.GetDepthInMainChain() < 1)
                          entry.push_back(Pair("category", "orphan"));
                      else if (wtx.GetBlocksToMaturity() > 0)
                          entry.push_back(Pair("category", "immature"));
                      else
                          entry.push_back(Pair("category", "generate"));
                  }
                  else
                  {
                      entry.push_back(Pair("category", "receive"));
                  }
                  if (!wtx.IsCoinStake())
                      entry.push_back(Pair("amount", ValueFromAmount(r.second)));
                  else
                  {
                      entry.push_back(Pair("amount", ValueFromAmount(-nFee)));
                      stop = true; // only one coinstake output
                  }
                  if (fLong)
                      WalletTxToJSON(wtx, entry);
                  ret.push_back(entry);
              }
              if (stop)
                  break;
          }
      }
  }
  
  void AcentryToJSON(const CAccountingEntry& acentry, const string& strAccount, Array& ret)
  {
      bool fAllAccounts = (strAccount == string("*"));
  
      if (fAllAccounts || acentry.strAccount == strAccount)
      {
          Object entry;
          entry.push_back(Pair("account", acentry.strAccount));
          entry.push_back(Pair("category", "move"));
          entry.push_back(Pair("time", (int64_t)acentry.nTime));
          entry.push_back(Pair("amount", ValueFromAmount(acentry.nCreditDebit)));
          entry.push_back(Pair("otheraccount", acentry.strOtherAccount));
          entry.push_back(Pair("comment", acentry.strComment));
          ret.push_back(entry);
      }
  }
  
  Value listtransactions(const Array& params, bool fHelp)
  {
      if (fHelp || params.size() > 3)
          throw runtime_error(
              "listtransactions [account] [count=10] [from=0]\n"
              "Returns up to [count] most recent transactions skipping the first [from] transactions for account [account].");
  
      string strAccount = "*";
      if (params.size() > 0)
          strAccount = params[0].get_str();
      int nCount = 10;
      if (params.size() > 1)
          nCount = params[1].get_int();
      int nFrom = 0;
      if (params.size() > 2)
          nFrom = params[2].get_int();
  
      if (nCount < 0)
          throw JSONRPCError(RPC_INVALID_PARAMETER, "Negative count");
      if (nFrom < 0)
          throw JSONRPCError(RPC_INVALID_PARAMETER, "Negative from");
  
      Array ret;
  
      std::list<CAccountingEntry> acentries;
      CWallet::TxItems txOrdered = pwalletMain->OrderedTxItems(acentries, strAccount);
  
      // iterate backwards until we have nCount items to return:
      for (CWallet::TxItems::reverse_iterator it = txOrdered.rbegin(); it != txOrdered.rend(); ++it)
      {
          CWalletTx *const pwtx = (*it).second.first;
          if (pwtx != 0)
              ListTransactions(*pwtx, strAccount, 0, true, ret);
          CAccountingEntry *const pacentry = (*it).second.second;
          if (pacentry != 0)
              AcentryToJSON(*pacentry, strAccount, ret);
  
          if ((int)ret.size() >= (nCount+nFrom)) break;
      }
      // ret is newest to oldest
  
      if (nFrom > (int)ret.size())
          nFrom = ret.size();
      if ((nFrom + nCount) > (int)ret.size())
          nCount = ret.size() - nFrom;
      Array::iterator first = ret.begin();
      std::advance(first, nFrom);
      Array::iterator last = ret.begin();
      std::advance(last, nFrom+nCount);
  
      if (last != ret.end()) ret.erase(last, ret.end());
      if (first != ret.begin()) ret.erase(ret.begin(), first);
  
      std::reverse(ret.begin(), ret.end()); // Return oldest to newest
  
      return ret;
  }
  
  Value listaccounts(const Array& params, bool fHelp)
  {
      if (fHelp || params.size() > 1)
          throw runtime_error(
              "listaccounts [minconf=1]\n"
              "Returns Object that has account names as keys, account balances as values.");
  
      accountingDeprecationCheck();
  
      int nMinDepth = 1;
      if (params.size() > 0)
          nMinDepth = params[0].get_int();
  
      map<string, int64_t> mapAccountBalances;
      BOOST_FOREACH(const PAIRTYPE(CTxDestination, string)& entry, pwalletMain->mapAddressBook) {
          if (IsMine(*pwalletMain, entry.first)) // This address belongs to me
              mapAccountBalances[entry.second] = 0;
      }
  
      for (map<uint256, CWalletTx>::iterator it = pwalletMain->mapWallet.begin(); it != pwalletMain->mapWallet.end(); ++it)
      {
          const CWalletTx& wtx = (*it).second;
          int64_t nFee;
          string strSentAccount;
          list<pair<CTxDestination, int64_t> > listReceived;
          list<pair<CTxDestination, int64_t> > listSent;
          int nDepth = wtx.GetDepthInMainChain();
          if (nDepth < 0)
              continue;
          wtx.GetAmounts(listReceived, listSent, nFee, strSentAccount);
          mapAccountBalances[strSentAccount] -= nFee;
          BOOST_FOREACH(const PAIRTYPE(CTxDestination, int64_t)& s, listSent)
              mapAccountBalances[strSentAccount] -= s.second;
          if (nDepth >= nMinDepth && wtx.GetBlocksToMaturity() == 0)
          {
              BOOST_FOREACH(const PAIRTYPE(CTxDestination, int64_t)& r, listReceived)
                  if (pwalletMain->mapAddressBook.count(r.first))
                      mapAccountBalances[pwalletMain->mapAddressBook[r.first]] += r.second;
                  else
                      mapAccountBalances[""] += r.second;
          }
      }
  
      list<CAccountingEntry> acentries;
      CWalletDB(pwalletMain->strWalletFile).ListAccountCreditDebit("*", acentries);
      BOOST_FOREACH(const CAccountingEntry& entry, acentries)
          mapAccountBalances[entry.strAccount] += entry.nCreditDebit;
  
      Object ret;
      BOOST_FOREACH(const PAIRTYPE(string, int64_t)& accountBalance, mapAccountBalances) {
          ret.push_back(Pair(accountBalance.first, ValueFromAmount(accountBalance.second)));
      }
      return ret;
  }
  
  Value listsinceblock(const Array& params, bool fHelp)
  {
      if (fHelp)
          throw runtime_error(
              "listsinceblock [blockhash] [target-confirmations]\n"
              "Get all transactions in blocks since block [blockhash], or all transactions if omitted");
  
      CBlockIndex *pindex = NULL;
      int target_confirms = 1;
  
      if (params.size() > 0)
      {
          uint256 blockId = 0;
  
          blockId.SetHex(params[0].get_str());
          pindex = CBlockLocator(blockId).GetBlockIndex();
      }
  
      if (params.size() > 1)
      {
          target_confirms = params[1].get_int();
  
          if (target_confirms < 1)
              throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid parameter");
      }
  
      int depth = pindex ? (1 + nBestHeight - pindex->nHeight) : -1;
  
      Array transactions;
  
      for (map<uint256, CWalletTx>::iterator it = pwalletMain->mapWallet.begin(); it != pwalletMain->mapWallet.end(); it++)
      {
          CWalletTx tx = (*it).second;
  
          if (depth == -1 || tx.GetDepthInMainChain() < depth)
              ListTransactions(tx, "*", 0, true, transactions);
      }
  
      uint256 lastblock;
  
      if (target_confirms == 1)
      {
          lastblock = hashBestChain;
      }
      else
      {
          int target_height = pindexBest->nHeight + 1 - target_confirms;
  
          CBlockIndex *block;
          for (block = pindexBest;
               block && block->nHeight > target_height;
               block = block->pprev)  { }
  
          lastblock = block ? block->GetBlockHash() : 0;
      }
  
      Object ret;
      ret.push_back(Pair("transactions", transactions));
      ret.push_back(Pair("lastblock", lastblock.GetHex()));
  
      return ret;
  }
  
  Value gettransaction(const Array& params, bool fHelp)
  {
      if (fHelp || params.size() != 1)
          throw runtime_error(
              "gettransaction <txid>\n"
              "Get detailed information about <txid>");
  
      uint256 hash;
      hash.SetHex(params[0].get_str());
  
      Object entry;
  
      if (pwalletMain->mapWallet.count(hash))
      {
          const CWalletTx& wtx = pwalletMain->mapWallet[hash];
  
          TxToJSON(wtx, 0, entry);
  
          int64_t nCredit = wtx.GetCredit();
          int64_t nDebit = wtx.GetDebit();
          int64_t nNet = nCredit - nDebit;
          int64_t nFee = (wtx.IsFromMe() ? wtx.GetValueOut() - nDebit : 0);
  
          entry.push_back(Pair("amount", ValueFromAmount(nNet - nFee)));
          if (wtx.IsFromMe())
              entry.push_back(Pair("fee", ValueFromAmount(nFee)));
  
          WalletTxToJSON(wtx, entry);
  
          Array details;
          ListTransactions(pwalletMain->mapWallet[hash], "*", 0, false, details);
          entry.push_back(Pair("details", details));
      }
      else
      {
          CTransaction tx;
          uint256 hashBlock = 0;
          if (GetTransaction(hash, tx, hashBlock))
          {
              TxToJSON(tx, 0, entry);
              if (hashBlock == 0)
                  entry.push_back(Pair("confirmations", 0));
              else
              {
                  entry.push_back(Pair("blockhash", hashBlock.GetHex()));
                  map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hashBlock);
                  if (mi != mapBlockIndex.end() && (*mi).second)
                  {
                      CBlockIndex* pindex = (*mi).second;
                      if (pindex->IsInMainChain())
                          entry.push_back(Pair("confirmations", 1 + nBestHeight - pindex->nHeight));
                      else
                          entry.push_back(Pair("confirmations", 0));
                  }
              }
          }
          else
              throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "No information available about transaction");
      }
  
      return entry;
  }
  
  
  Value backupwallet(const Array& params, bool fHelp)
  {
      if (fHelp || params.size() != 1)
          throw runtime_error(
              "backupwallet <destination>\n"
              "Safely copies wallet.dat to destination, which can be a directory or a path with filename.");
  
      string strDest = params[0].get_str();
      if (!BackupWallet(*pwalletMain, strDest))
          throw JSONRPCError(RPC_WALLET_ERROR, "Error: Wallet backup failed!");
  
      return Value::null;
  }
  
  
  Value keypoolrefill(const Array& params, bool fHelp)
  {
      if (fHelp || params.size() > 1)
          throw runtime_error(
              "keypoolrefill [new-size]\n"
              "Fills the keypool."
              + HelpRequiringPassphrase());
  
      unsigned int nSize = max(GetArg("-keypool", 100), (int64_t)0);
      if (params.size() > 0) {
          if (params[0].get_int() < 0)
              throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid parameter, expected valid size");
          nSize = (unsigned int) params[0].get_int();
      }
  
      EnsureWalletIsUnlocked();
  
      pwalletMain->TopUpKeyPool(nSize);
  
      if (pwalletMain->GetKeyPoolSize() < nSize)
          throw JSONRPCError(RPC_WALLET_ERROR, "Error refreshing keypool.");
  
      return Value::null;
  }
  
  
  static void LockWallet(CWallet* pWallet)
  {
      LOCK(cs_nWalletUnlockTime);
      nWalletUnlockTime = 0;
      pWallet->Lock();
  }
  
  Value walletpassphrase(const Array& params, bool fHelp)
  {
      if (pwalletMain->IsCrypted() && (fHelp || params.size() < 2 || params.size() > 3))
          throw runtime_error(
              "walletpassphrase <passphrase> <timeout> [stakingonly]\n"
              "Stores the wallet decryption key in memory for <timeout> seconds.\n"
              "if [stakingonly] is true sending functions are disabled.");
      if (fHelp)
          return true;
      if (!fServer)
          throw JSONRPCError(RPC_SERVER_NOT_STARTED, "Error: RPC server was not started, use server=1 to change this.");
      if (!pwalletMain->IsCrypted())
          throw JSONRPCError(RPC_WALLET_WRONG_ENC_STATE, "Error: running with an unencrypted wallet, but walletpassphrase was called.");
  
      // Note that the walletpassphrase is stored in params[0] which is not mlock()ed
      SecureString strWalletPass;
      strWalletPass.reserve(100);
      // TODO: get rid of this .c_str() by implementing SecureString::operator=(std::string)
      // Alternately, find a way to make params[0] mlock()'d to begin with.
      strWalletPass = params[0].get_str().c_str();
  
      if (strWalletPass.length() > 0)
      {
          if (!pwalletMain->Unlock(strWalletPass))
              throw JSONRPCError(RPC_WALLET_PASSPHRASE_INCORRECT, "Error: The wallet passphrase entered was incorrect.");
      }
      else
          throw runtime_error(
              "walletpassphrase <passphrase> <timeout>\n"
              "Stores the wallet decryption key in memory for <timeout> seconds.");
  
      pwalletMain->TopUpKeyPool();
  
      int64_t nSleepTime = params[1].get_int64();
      LOCK(cs_nWalletUnlockTime);
      nWalletUnlockTime = GetTime() + nSleepTime;
      RPCRunLater("lockwallet", boost::bind(LockWallet, pwalletMain), nSleepTime);
  
      // ppcoin: if user OS account compromised prevent trivial sendmoney commands
      if (params.size() > 2)
          fWalletUnlockStakingOnly = params[2].get_bool();
      else
          fWalletUnlockStakingOnly = false;
  
      return Value::null;
  }
  
  
  Value walletpassphrasechange(const Array& params, bool fHelp)
  {
      if (pwalletMain->IsCrypted() && (fHelp || params.size() != 2))
          throw runtime_error(
              "walletpassphrasechange <oldpassphrase> <newpassphrase>\n"
              "Changes the wallet passphrase from <oldpassphrase> to <newpassphrase>.");
      if (fHelp)
          return true;
      if (!pwalletMain->IsCrypted())
          throw JSONRPCError(RPC_WALLET_WRONG_ENC_STATE, "Error: running with an unencrypted wallet, but walletpassphrasechange was called.");
  
      // TODO: get rid of these .c_str() calls by implementing SecureString::operator=(std::string)
      // Alternately, find a way to make params[0] mlock()'d to begin with.
      SecureString strOldWalletPass;
      strOldWalletPass.reserve(100);
      strOldWalletPass = params[0].get_str().c_str();
  
      SecureString strNewWalletPass;
      strNewWalletPass.reserve(100);
      strNewWalletPass = params[1].get_str().c_str();
  
      if (strOldWalletPass.length() < 1 || strNewWalletPass.length() < 1)
          throw runtime_error(
              "walletpassphrasechange <oldpassphrase> <newpassphrase>\n"
              "Changes the wallet passphrase from <oldpassphrase> to <newpassphrase>.");
  
      if (!pwalletMain->ChangeWalletPassphrase(strOldWalletPass, strNewWalletPass))
          throw JSONRPCError(RPC_WALLET_PASSPHRASE_INCORRECT, "Error: The wallet passphrase entered was incorrect.");
  
      return Value::null;
  }
  
  
  Value walletlock(const Array& params, bool fHelp)
  {
      if (pwalletMain->IsCrypted() && (fHelp || params.size() != 0))
          throw runtime_error(
              "walletlock\n"
              "Removes the wallet encryption key from memory, locking the wallet.\n"
              "After calling this method, you will need to call walletpassphrase again\n"
              "before being able to call any methods which require the wallet to be unlocked.");
      if (fHelp)
          return true;
      if (!pwalletMain->IsCrypted())
          throw JSONRPCError(RPC_WALLET_WRONG_ENC_STATE, "Error: running with an unencrypted wallet, but walletlock was called.");
  
      {
          LOCK(cs_nWalletUnlockTime);
          pwalletMain->Lock();
          nWalletUnlockTime = 0;
      }
  
      return Value::null;
  }
  
  
  Value encryptwallet(const Array& params, bool fHelp)
  {
      if (!pwalletMain->IsCrypted() && (fHelp || params.size() != 1))
          throw runtime_error(
              "encryptwallet <passphrase>\n"
              "Encrypts the wallet with <passphrase>.");
      if (fHelp)
          return true;
      if (pwalletMain->IsCrypted())
          throw JSONRPCError(RPC_WALLET_WRONG_ENC_STATE, "Error: running with an encrypted wallet, but encryptwallet was called.");
  
      // TODO: get rid of this .c_str() by implementing SecureString::operator=(std::string)
      // Alternately, find a way to make params[0] mlock()'d to begin with.
      SecureString strWalletPass;
      strWalletPass.reserve(100);
      strWalletPass = params[0].get_str().c_str();
  
      if (strWalletPass.length() < 1)
          throw runtime_error(
              "encryptwallet <passphrase>\n"
              "Encrypts the wallet with <passphrase>.");
  
      if (!pwalletMain->EncryptWallet(strWalletPass))
          throw JSONRPCError(RPC_WALLET_ENCRYPTION_FAILED, "Error: Failed to encrypt the wallet.");
  
      // BDB seems to have a bad habit of writing old data into
      // slack space in .dat files; that is bad if the old data is
      // unencrypted private keys. So:
      StartShutdown();
      return "wallet encrypted; Vroomcoin server stopping, restart to run with encrypted wallet. The keypool has been flushed, you need to make a new backup.";
  }
  
  
  // ppcoin: reserve balance from being staked for network protection
  Value reservebalance(const Array& params, bool fHelp)
  {
      if (fHelp || params.size() > 2)
          throw runtime_error(
              "reservebalance [<reserve> [amount]]\n"
              "<reserve> is true or false to turn balance reserve on or off.\n"
              "<amount> is a real and rounded to cent.\n"
              "Set reserve amount not participating in network protection.\n"
              "If no parameters provided current setting is printed.\n");
  
      if (params.size() > 0)
      {
          bool fReserve = params[0].get_bool();
          if (fReserve)
          {
              if (params.size() == 1)
                  throw runtime_error("must provide amount to reserve balance.\n");
              int64_t nAmount = AmountFromValue(params[1]);
              nAmount = (nAmount / CENT) * CENT;  // round to cent
              if (nAmount < 0)
                  throw runtime_error("amount cannot be negative.\n");
              nReserveBalance = nAmount;
          }
          else
          {
              if (params.size() > 1)
                  throw runtime_error("cannot specify amount to turn off reserve.\n");
              nReserveBalance = 0;
          }
      }
  
      Object result;
      result.push_back(Pair("reserve", (nReserveBalance > 0)));
      result.push_back(Pair("amount", ValueFromAmount(nReserveBalance)));
      return result;
  }
  
  
  // ppcoin: check wallet integrity
  Value checkwallet(const Array& params, bool fHelp)
  {
      if (fHelp || params.size() > 0)
          throw runtime_error(
              "checkwallet\n"
              "Check wallet for integrity.\n");
  
      int nMismatchSpent;
      int64_t nBalanceInQuestion;
      pwalletMain->FixSpentCoins(nMismatchSpent, nBalanceInQuestion, true);
      Object result;
      if (nMismatchSpent == 0)
          result.push_back(Pair("wallet check passed", true));
      else
      {
          result.push_back(Pair("mismatched spent coins", nMismatchSpent));
          result.push_back(Pair("amount in question", ValueFromAmount(nBalanceInQuestion)));
      }
      return result;
  }
  
  
  // ppcoin: repair wallet
  Value repairwallet(const Array& params, bool fHelp)
  {
      if (fHelp || params.size() > 0)
          throw runtime_error(
              "repairwallet\n"
              "Repair wallet if checkwallet reports any problem.\n");
  
      int nMismatchSpent;
      int64_t nBalanceInQuestion;
      pwalletMain->FixSpentCoins(nMismatchSpent, nBalanceInQuestion);
      Object result;
      if (nMismatchSpent == 0)
          result.push_back(Pair("wallet check passed", true));
      else
      {
          result.push_back(Pair("mismatched spent coins", nMismatchSpent));
          result.push_back(Pair("amount affected by repair", ValueFromAmount(nBalanceInQuestion)));
      }
      return result;
  }
  
  // NovaCoin: resend unconfirmed wallet transactions
  Value resendtx(const Array& params, bool fHelp)
  {
      if (fHelp || params.size() > 1)
          throw runtime_error(
              "resendtx\n"
              "Re-send unconfirmed transactions.\n"
          );
  
      ResendWalletTransactions(true);
  
      return Value::null;
  }
  
  // ppcoin: make a public-private key pair
  Value makekeypair(const Array& params, bool fHelp)
  {
      if (fHelp || params.size() > 1)
          throw runtime_error(
              "makekeypair [prefix]\n"
              "Make a public/private key pair.\n"
              "[prefix] is optional preferred prefix for the public key.\n");
  
      string strPrefix = "";
      if (params.size() > 0)
          strPrefix = params[0].get_str();
   
      CKey key;
      key.MakeNewKey(false);
  
      CPrivKey vchPrivKey = key.GetPrivKey();
      Object result;
      result.push_back(Pair("PrivateKey", HexStr<CPrivKey::iterator>(vchPrivKey.begin(), vchPrivKey.end())));
      result.push_back(Pair("PublicKey", HexStr(key.GetPubKey())));
      return result;
  }
  
  Value settxfee(const Array& params, bool fHelp)
  {
      if (fHelp || params.size() < 1 || params.size() > 1 || AmountFromValue(params[0]) < MIN_TX_FEE)
          throw runtime_error(
              "settxfee <amount>\n"
              "<amount> is a real and is rounded to the nearest 0.01");
  
      nTransactionFee = AmountFromValue(params[0]);
      nTransactionFee = (nTransactionFee / CENT) * CENT;  // round to cent
  
      return true;
  }
  