kevacoin/src/walletdb.h

// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2013 The Bitcoin developers
// Distributed under the MIT/X11 software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#ifndef BITCOIN_WALLETDB_H
#define BITCOIN_WALLETDB_H

#include "db.h"
#include "key.h"

#include <list>
#include <stdint.h>
#include <string>
#include <utility>
#include <vector>

class CAccount;
class CAccountingEntry;
struct CBlockLocator;
class CKeyPool;
class CMasterKey;
class CScript;
class CWallet;
class CWalletTx;
class uint160;
class uint256;

/** Error statuses for the wallet database */
enum DBErrors
{
    DB_LOAD_OK,
    DB_CORRUPT,
    DB_NONCRITICAL_ERROR,
    DB_TOO_NEW,
    DB_LOAD_FAIL,
    DB_NEED_REWRITE
};

class CKeyMetadata
{
public:
    static const int CURRENT_VERSION=1;
    int nVersion;
    int64_t nCreateTime; // 0 means unknown

    CKeyMetadata()
    {
        SetNull();
    }
    CKeyMetadata(int64_t nCreateTime_)
    {
        nVersion = CKeyMetadata::CURRENT_VERSION;
        nCreateTime = nCreateTime_;
    }

    IMPLEMENT_SERIALIZE
    (
        READWRITE(this->nVersion);
        nVersion = this->nVersion;
        READWRITE(nCreateTime);
    )

    void SetNull()
    {
        nVersion = CKeyMetadata::CURRENT_VERSION;
        nCreateTime = 0;
    }
};

/** Access to the wallet database (wallet.dat) */
class CWalletDB : public CDB
{
public:
    CWalletDB(std::string strFilename, const char* pszMode="r+") : CDB(strFilename.c_str(), pszMode)
    {
    }
private:
    CWalletDB(const CWalletDB&);
    void operator=(const CWalletDB&);
public:
    bool WriteName(const std::string& strAddress, const std::string& strName);
    bool EraseName(const std::string& strAddress);

    bool WritePurpose(const std::string& strAddress, const std::string& purpose);
    bool ErasePurpose(const std::string& strAddress);

    bool WriteTx(uint256 hash, const CWalletTx& wtx);
    bool EraseTx(uint256 hash);

    bool WriteKey(const CPubKey& vchPubKey, const CPrivKey& vchPrivKey, const CKeyMetadata &keyMeta);
    bool WriteCryptedKey(const CPubKey& vchPubKey, const std::vector<unsigned char>& vchCryptedSecret, const CKeyMetadata &keyMeta);
    bool WriteMasterKey(unsigned int nID, const CMasterKey& kMasterKey);

    bool WriteCScript(const uint160& hash, const CScript& redeemScript);

    bool WriteBestBlock(const CBlockLocator& locator);
    bool ReadBestBlock(CBlockLocator& locator);

    bool WriteOrderPosNext(int64_t nOrderPosNext);

    bool WriteDefaultKey(const CPubKey& vchPubKey);

    bool ReadPool(int64_t nPool, CKeyPool& keypool);
    bool WritePool(int64_t nPool, const CKeyPool& keypool);
    bool ErasePool(int64_t nPool);

    // Settings are no longer stored in wallet.dat; these are
    // used only for backwards compatibility:
    template<typename T>
    bool ReadSetting(const std::string& strKey, T& value)
    {
        return Read(std::make_pair(std::string("setting"), strKey), value);
    }
    template<typename T>
    bool WriteSetting(const std::string& strKey, const T& value)
    {
        nWalletDBUpdated++;
        return Write(std::make_pair(std::string("setting"), strKey), value);
    }
 
    bool EraseSetting(const std::string& strKey);

    bool WriteMinVersion(int nVersion);

    bool ReadAccount(const std::string& strAccount, CAccount& account);
    bool WriteAccount(const std::string& strAccount, const CAccount& account);
private:
    bool WriteAccountingEntry(const uint64_t nAccEntryNum, const CAccountingEntry& acentry);
public:
    bool WriteAccountingEntry(const CAccountingEntry& acentry);
    int64_t GetAccountCreditDebit(const std::string& strAccount);
    void ListAccountCreditDebit(const std::string& strAccount, std::list<CAccountingEntry>& acentries);

    DBErrors ReorderTransactions(CWallet*);
    DBErrors LoadWallet(CWallet* pwallet);
    static bool Recover(CDBEnv& dbenv, std::string filename, bool fOnlyKeys);
    static bool Recover(CDBEnv& dbenv, std::string filename);
};

bool BackupWallet(const CWallet& wallet, const std::string& strDest);

#endif // BITCOIN_WALLETDB_H