Merge pull request #5745

50c72f2 [Move Only] Move wallet related things to src/wallet/ (Jonas Schnelli)

1 files changed, 906 insertions, 0 deletions

diff --git a/src/wallet/wallet.h b/src/wallet/wallet.h
new file mode 100644
index 0000000000..b2973250a4
--- /dev/null
+++ b/src/wallet/wallet.h
@@ -0,0 +1,906 @@
+// Copyright (c) 2009-2010 Satoshi Nakamoto
+// Copyright (c) 2009-2014 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#ifndef BITCOIN_WALLET_H
+#define BITCOIN_WALLET_H
+
+#include "amount.h"
+#include "primitives/block.h"
+#include "primitives/transaction.h"
+#include "crypter.h"
+#include "key.h"
+#include "keystore.h"
+#include "main.h"
+#include "ui_interface.h"
+#include "wallet/wallet_ismine.h"
+#include "wallet/walletdb.h"
+
+#include <algorithm>
+#include <map>
+#include <set>
+#include <stdexcept>
+#include <stdint.h>
+#include <string>
+#include <utility>
+#include <vector>
+
+/**
+ * Settings
+ */
+extern CFeeRate payTxFee;
+extern CAmount maxTxFee;
+extern unsigned int nTxConfirmTarget;
+extern bool bSpendZeroConfChange;
+extern bool fSendFreeTransactions;
+extern bool fPayAtLeastCustomFee;
+
+//! -paytxfee default
+static const CAmount DEFAULT_TRANSACTION_FEE = 0;
+//! -paytxfee will warn if called with a higher fee than this amount (in satoshis) per KB
+static const CAmount nHighTransactionFeeWarning = 0.01 * COIN;
+//! -maxtxfee default
+static const CAmount DEFAULT_TRANSACTION_MAXFEE = 0.1 * COIN;
+//! -maxtxfee will warn if called with a higher fee than this amount (in satoshis)
+static const CAmount nHighTransactionMaxFeeWarning = 100 * nHighTransactionFeeWarning;
+//! Largest (in bytes) free transaction we're willing to create
+static const unsigned int MAX_FREE_TRANSACTION_CREATE_SIZE = 1000;
+
+class CAccountingEntry;
+class CCoinControl;
+class COutput;
+class CReserveKey;
+class CScript;
+class CWalletTx;
+
+/** (client) version numbers for particular wallet features */
+enum WalletFeature
+{
+    FEATURE_BASE = 10500, // the earliest version new wallets supports (only useful for getinfo's clientversion output)
+
+    FEATURE_WALLETCRYPT = 40000, // wallet encryption
+    FEATURE_COMPRPUBKEY = 60000, // compressed public keys
+
+    FEATURE_LATEST = 60000
+};
+
+
+/** A key pool entry */
+class CKeyPool
+{
+public:
+    int64_t nTime;
+    CPubKey vchPubKey;
+
+    CKeyPool();
+    CKeyPool(const CPubKey& vchPubKeyIn);
+
+    ADD_SERIALIZE_METHODS;
+
+    template <typename Stream, typename Operation>
+    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
+        if (!(nType & SER_GETHASH))
+            READWRITE(nVersion);
+        READWRITE(nTime);
+        READWRITE(vchPubKey);
+    }
+};
+
+/** Address book data */
+class CAddressBookData
+{
+public:
+    std::string name;
+    std::string purpose;
+
+    CAddressBookData()
+    {
+        purpose = "unknown";
+    }
+
+    typedef std::map<std::string, std::string> StringMap;
+    StringMap destdata;
+};
+
+struct CRecipient
+{
+    CScript scriptPubKey;
+    CAmount nAmount;
+    bool fSubtractFeeFromAmount;
+};
+
+typedef std::map<std::string, std::string> mapValue_t;
+
+
+static void ReadOrderPos(int64_t& nOrderPos, mapValue_t& mapValue)
+{
+    if (!mapValue.count("n"))
+    {
+        nOrderPos = -1; // TODO: calculate elsewhere
+        return;
+    }
+    nOrderPos = atoi64(mapValue["n"].c_str());
+}
+
+
+static void WriteOrderPos(const int64_t& nOrderPos, mapValue_t& mapValue)
+{
+    if (nOrderPos == -1)
+        return;
+    mapValue["n"] = i64tostr(nOrderPos);
+}
+
+struct COutputEntry
+{
+    CTxDestination destination;
+    CAmount amount;
+    int vout;
+};
+
+/** A transaction with a merkle branch linking it to the block chain. */
+class CMerkleTx : public CTransaction
+{
+private:
+    int GetDepthInMainChainINTERNAL(const CBlockIndex* &pindexRet) const;
+
+public:
+    uint256 hashBlock;
+    std::vector<uint256> vMerkleBranch;
+    int nIndex;
+
+    // memory only
+    mutable bool fMerkleVerified;
+
+
+    CMerkleTx()
+    {
+        Init();
+    }
+
+    CMerkleTx(const CTransaction& txIn) : CTransaction(txIn)
+    {
+        Init();
+    }
+
+    void Init()
+    {
+        hashBlock = uint256();
+        nIndex = -1;
+        fMerkleVerified = false;
+    }
+
+    ADD_SERIALIZE_METHODS;
+
+    template <typename Stream, typename Operation>
+    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
+        READWRITE(*(CTransaction*)this);
+        nVersion = this->nVersion;
+        READWRITE(hashBlock);
+        READWRITE(vMerkleBranch);
+        READWRITE(nIndex);
+    }
+
+    int SetMerkleBranch(const CBlock& block);
+
+
+    /**
+     * Return depth of transaction in blockchain:
+     * -1  : not in blockchain, and not in memory pool (conflicted transaction)
+     *  0  : in memory pool, waiting to be included in a block
+     * >=1 : this many blocks deep in the main chain
+     */
+    int GetDepthInMainChain(const CBlockIndex* &pindexRet) const;
+    int GetDepthInMainChain() const { const CBlockIndex *pindexRet; return GetDepthInMainChain(pindexRet); }
+    bool IsInMainChain() const { const CBlockIndex *pindexRet; return GetDepthInMainChainINTERNAL(pindexRet) > 0; }
+    int GetBlocksToMaturity() const;
+    bool AcceptToMemoryPool(bool fLimitFree=true, bool fRejectAbsurdFee=true);
+};
+
+/** 
+ * A transaction with a bunch of additional info that only the owner cares about.
+ * It includes any unrecorded transactions needed to link it back to the block chain.
+ */
+class CWalletTx : public CMerkleTx
+{
+private:
+    const CWallet* pwallet;
+
+public:
+    mapValue_t mapValue;
+    std::vector<std::pair<std::string, std::string> > vOrderForm;
+    unsigned int fTimeReceivedIsTxTime;
+    unsigned int nTimeReceived; //! time received by this node
+    unsigned int nTimeSmart;
+    char fFromMe;
+    std::string strFromAccount;
+    int64_t nOrderPos; //! position in ordered transaction list
+
+    // memory only
+    mutable bool fDebitCached;
+    mutable bool fCreditCached;
+    mutable bool fImmatureCreditCached;
+    mutable bool fAvailableCreditCached;
+    mutable bool fWatchDebitCached;
+    mutable bool fWatchCreditCached;
+    mutable bool fImmatureWatchCreditCached;
+    mutable bool fAvailableWatchCreditCached;
+    mutable bool fChangeCached;
+    mutable CAmount nDebitCached;
+    mutable CAmount nCreditCached;
+    mutable CAmount nImmatureCreditCached;
+    mutable CAmount nAvailableCreditCached;
+    mutable CAmount nWatchDebitCached;
+    mutable CAmount nWatchCreditCached;
+    mutable CAmount nImmatureWatchCreditCached;
+    mutable CAmount nAvailableWatchCreditCached;
+    mutable CAmount nChangeCached;
+
+    CWalletTx()
+    {
+        Init(NULL);
+    }
+
+    CWalletTx(const CWallet* pwalletIn)
+    {
+        Init(pwalletIn);
+    }
+
+    CWalletTx(const CWallet* pwalletIn, const CMerkleTx& txIn) : CMerkleTx(txIn)
+    {
+        Init(pwalletIn);
+    }
+
+    CWalletTx(const CWallet* pwalletIn, const CTransaction& txIn) : CMerkleTx(txIn)
+    {
+        Init(pwalletIn);
+    }
+
+    void Init(const CWallet* pwalletIn)
+    {
+        pwallet = pwalletIn;
+        mapValue.clear();
+        vOrderForm.clear();
+        fTimeReceivedIsTxTime = false;
+        nTimeReceived = 0;
+        nTimeSmart = 0;
+        fFromMe = false;
+        strFromAccount.clear();
+        fDebitCached = false;
+        fCreditCached = false;
+        fImmatureCreditCached = false;
+        fAvailableCreditCached = false;
+        fWatchDebitCached = false;
+        fWatchCreditCached = false;
+        fImmatureWatchCreditCached = false;
+        fAvailableWatchCreditCached = false;
+        fChangeCached = false;
+        nDebitCached = 0;
+        nCreditCached = 0;
+        nImmatureCreditCached = 0;
+        nAvailableCreditCached = 0;
+        nWatchDebitCached = 0;
+        nWatchCreditCached = 0;
+        nAvailableWatchCreditCached = 0;
+        nImmatureWatchCreditCached = 0;
+        nChangeCached = 0;
+        nOrderPos = -1;
+    }
+
+    ADD_SERIALIZE_METHODS;
+
+    template <typename Stream, typename Operation>
+    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
+        if (ser_action.ForRead())
+            Init(NULL);
+        char fSpent = false;
+
+        if (!ser_action.ForRead())
+        {
+            mapValue["fromaccount"] = strFromAccount;
+
+            WriteOrderPos(nOrderPos, mapValue);
+
+            if (nTimeSmart)
+                mapValue["timesmart"] = strprintf("%u", nTimeSmart);
+        }
+
+        READWRITE(*(CMerkleTx*)this);
+        std::vector<CMerkleTx> vUnused; //! Used to be vtxPrev
+        READWRITE(vUnused);
+        READWRITE(mapValue);
+        READWRITE(vOrderForm);
+        READWRITE(fTimeReceivedIsTxTime);
+        READWRITE(nTimeReceived);
+        READWRITE(fFromMe);
+        READWRITE(fSpent);
+
+        if (ser_action.ForRead())
+        {
+            strFromAccount = mapValue["fromaccount"];
+
+            ReadOrderPos(nOrderPos, mapValue);
+
+            nTimeSmart = mapValue.count("timesmart") ? (unsigned int)atoi64(mapValue["timesmart"]) : 0;
+        }
+
+        mapValue.erase("fromaccount");
+        mapValue.erase("version");
+        mapValue.erase("spent");
+        mapValue.erase("n");
+        mapValue.erase("timesmart");
+    }
+
+    //! make sure balances are recalculated
+    void MarkDirty()
+    {
+        fCreditCached = false;
+        fAvailableCreditCached = false;
+        fWatchDebitCached = false;
+        fWatchCreditCached = false;
+        fAvailableWatchCreditCached = false;
+        fImmatureWatchCreditCached = false;
+        fDebitCached = false;
+        fChangeCached = false;
+    }
+
+    void BindWallet(CWallet *pwalletIn)
+    {
+        pwallet = pwalletIn;
+        MarkDirty();
+    }
+
+    //! filter decides which addresses will count towards the debit
+    CAmount GetDebit(const isminefilter& filter) const;
+    CAmount GetCredit(const isminefilter& filter) const;
+    CAmount GetImmatureCredit(bool fUseCache=true) const;
+    CAmount GetAvailableCredit(bool fUseCache=true) const;
+    CAmount GetImmatureWatchOnlyCredit(const bool& fUseCache=true) const;
+    CAmount GetAvailableWatchOnlyCredit(const bool& fUseCache=true) const;
+    CAmount GetChange() const;
+
+    void GetAmounts(std::list<COutputEntry>& listReceived,
+                    std::list<COutputEntry>& listSent, CAmount& nFee, std::string& strSentAccount, const isminefilter& filter) const;
+
+    void GetAccountAmounts(const std::string& strAccount, CAmount& nReceived,
+                           CAmount& nSent, CAmount& nFee, const isminefilter& filter) const;
+
+    bool IsFromMe(const isminefilter& filter) const
+    {
+        return (GetDebit(filter) > 0);
+    }
+
+    bool IsTrusted() const;
+
+    bool WriteToDisk(CWalletDB *pwalletdb);
+
+    int64_t GetTxTime() const;
+    int GetRequestCount() const;
+
+    void RelayWalletTransaction();
+
+    std::set<uint256> GetConflicts() const;
+};
+
+
+
+
+class COutput
+{
+public:
+    const CWalletTx *tx;
+    int i;
+    int nDepth;
+    bool fSpendable;
+
+    COutput(const CWalletTx *txIn, int iIn, int nDepthIn, bool fSpendableIn)
+    {
+        tx = txIn; i = iIn; nDepth = nDepthIn; fSpendable = fSpendableIn;
+    }
+
+    std::string ToString() const;
+};
+
+
+
+
+/** Private key that includes an expiration date in case it never gets used. */
+class CWalletKey
+{
+public:
+    CPrivKey vchPrivKey;
+    int64_t nTimeCreated;
+    int64_t nTimeExpires;
+    std::string strComment;
+    //! todo: add something to note what created it (user, getnewaddress, change)
+    //!   maybe should have a map<string, string> property map
+
+    CWalletKey(int64_t nExpires=0);
+
+    ADD_SERIALIZE_METHODS;
+
+    template <typename Stream, typename Operation>
+    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
+        if (!(nType & SER_GETHASH))
+            READWRITE(nVersion);
+        READWRITE(vchPrivKey);
+        READWRITE(nTimeCreated);
+        READWRITE(nTimeExpires);
+        READWRITE(LIMITED_STRING(strComment, 65536));
+    }
+};
+
+
+
+/** 
+ * A CWallet is an extension of a keystore, which also maintains a set of transactions and balances,
+ * and provides the ability to create new transactions.
+ */
+class CWallet : public CCryptoKeyStore, public CValidationInterface
+{
+private:
+    bool SelectCoins(const CAmount& nTargetValue, std::set<std::pair<const CWalletTx*,unsigned int> >& setCoinsRet, CAmount& nValueRet, const CCoinControl *coinControl = NULL) const;
+
+    CWalletDB *pwalletdbEncryption;
+
+    //! the current wallet version: clients below this version are not able to load the wallet
+    int nWalletVersion;
+
+    //! the maximum wallet format version: memory-only variable that specifies to what version this wallet may be upgraded
+    int nWalletMaxVersion;
+
+    int64_t nNextResend;
+    int64_t nLastResend;
+
+    /**
+     * Used to keep track of spent outpoints, and
+     * detect and report conflicts (double-spends or
+     * mutated transactions where the mutant gets mined).
+     */
+    typedef std::multimap<COutPoint, uint256> TxSpends;
+    TxSpends mapTxSpends;
+    void AddToSpends(const COutPoint& outpoint, const uint256& wtxid);
+    void AddToSpends(const uint256& wtxid);
+
+    void SyncMetaData(std::pair<TxSpends::iterator, TxSpends::iterator>);
+
+public:
+    /*
+     * Main wallet lock.
+     * This lock protects all the fields added by CWallet
+     *   except for:
+     *      fFileBacked (immutable after instantiation)
+     *      strWalletFile (immutable after instantiation)
+     */
+    mutable CCriticalSection cs_wallet;
+
+    bool fFileBacked;
+    std::string strWalletFile;
+
+    std::set<int64_t> setKeyPool;
+    std::map<CKeyID, CKeyMetadata> mapKeyMetadata;
+
+    typedef std::map<unsigned int, CMasterKey> MasterKeyMap;
+    MasterKeyMap mapMasterKeys;
+    unsigned int nMasterKeyMaxID;
+
+    CWallet()
+    {
+        SetNull();
+    }
+
+    CWallet(std::string strWalletFileIn)
+    {
+        SetNull();
+
+        strWalletFile = strWalletFileIn;
+        fFileBacked = true;
+    }
+
+    ~CWallet()
+    {
+        delete pwalletdbEncryption;
+        pwalletdbEncryption = NULL;
+    }
+
+    void SetNull()
+    {
+        nWalletVersion = FEATURE_BASE;
+        nWalletMaxVersion = FEATURE_BASE;
+        fFileBacked = false;
+        nMasterKeyMaxID = 0;
+        pwalletdbEncryption = NULL;
+        nOrderPosNext = 0;
+        nNextResend = 0;
+        nLastResend = 0;
+        nTimeFirstKey = 0;
+    }
+
+    std::map<uint256, CWalletTx> mapWallet;
+
+    int64_t nOrderPosNext;
+    std::map<uint256, int> mapRequestCount;
+
+    std::map<CTxDestination, CAddressBookData> mapAddressBook;
+
+    CPubKey vchDefaultKey;
+
+    std::set<COutPoint> setLockedCoins;
+
+    int64_t nTimeFirstKey;
+
+    const CWalletTx* GetWalletTx(const uint256& hash) const;
+
+    //! check whether we are allowed to upgrade (or already support) to the named feature
+    bool CanSupportFeature(enum WalletFeature wf) { AssertLockHeld(cs_wallet); return nWalletMaxVersion >= wf; }
+
+    void AvailableCoins(std::vector<COutput>& vCoins, bool fOnlyConfirmed=true, const CCoinControl *coinControl = NULL) const;
+    bool SelectCoinsMinConf(const CAmount& nTargetValue, int nConfMine, int nConfTheirs, std::vector<COutput> vCoins, std::set<std::pair<const CWalletTx*,unsigned int> >& setCoinsRet, CAmount& nValueRet) const;
+
+    bool IsSpent(const uint256& hash, unsigned int n) const;
+
+    bool IsLockedCoin(uint256 hash, unsigned int n) const;
+    void LockCoin(COutPoint& output);
+    void UnlockCoin(COutPoint& output);
+    void UnlockAllCoins();
+    void ListLockedCoins(std::vector<COutPoint>& vOutpts);
+
+    /**
+     * keystore implementation
+     * Generate a new key
+     */
+    CPubKey GenerateNewKey();
+    //! Adds a key to the store, and saves it to disk.
+    bool AddKeyPubKey(const CKey& key, const CPubKey &pubkey);
+    //! Adds a key to the store, without saving it to disk (used by LoadWallet)
+    bool LoadKey(const CKey& key, const CPubKey &pubkey) { return CCryptoKeyStore::AddKeyPubKey(key, pubkey); }
+    //! Load metadata (used by LoadWallet)
+    bool LoadKeyMetadata(const CPubKey &pubkey, const CKeyMetadata &metadata);
+
+    bool LoadMinVersion(int nVersion) { AssertLockHeld(cs_wallet); nWalletVersion = nVersion; nWalletMaxVersion = std::max(nWalletMaxVersion, nVersion); return true; }
+
+    //! Adds an encrypted key to the store, and saves it to disk.
+    bool AddCryptedKey(const CPubKey &vchPubKey, const std::vector<unsigned char> &vchCryptedSecret);
+    //! Adds an encrypted key to the store, without saving it to disk (used by LoadWallet)
+    bool LoadCryptedKey(const CPubKey &vchPubKey, const std::vector<unsigned char> &vchCryptedSecret);
+    bool AddCScript(const CScript& redeemScript);
+    bool LoadCScript(const CScript& redeemScript);
+
+    //! Adds a destination data tuple to the store, and saves it to disk
+    bool AddDestData(const CTxDestination &dest, const std::string &key, const std::string &value);
+    //! Erases a destination data tuple in the store and on disk
+    bool EraseDestData(const CTxDestination &dest, const std::string &key);
+    //! Adds a destination data tuple to the store, without saving it to disk
+    bool LoadDestData(const CTxDestination &dest, const std::string &key, const std::string &value);
+    //! Look up a destination data tuple in the store, return true if found false otherwise
+    bool GetDestData(const CTxDestination &dest, const std::string &key, std::string *value) const;
+
+    //! Adds a watch-only address to the store, and saves it to disk.
+    bool AddWatchOnly(const CScript &dest);
+    bool RemoveWatchOnly(const CScript &dest);
+    //! Adds a watch-only address to the store, without saving it to disk (used by LoadWallet)
+    bool LoadWatchOnly(const CScript &dest);
+
+    bool Unlock(const SecureString& strWalletPassphrase);
+    bool ChangeWalletPassphrase(const SecureString& strOldWalletPassphrase, const SecureString& strNewWalletPassphrase);
+    bool EncryptWallet(const SecureString& strWalletPassphrase);
+
+    void GetKeyBirthTimes(std::map<CKeyID, int64_t> &mapKeyBirth) const;
+
+    /** 
+     * Increment the next transaction order id
+     * @return next transaction order id
+     */
+    int64_t IncOrderPosNext(CWalletDB *pwalletdb = NULL);
+
+    typedef std::pair<CWalletTx*, CAccountingEntry*> TxPair;
+    typedef std::multimap<int64_t, TxPair > TxItems;
+
+    /**
+     * Get the wallet's activity log
+     * @return multimap of ordered transactions and accounting entries
+     * @warning Returned pointers are *only* valid within the scope of passed acentries
+     */
+    TxItems OrderedTxItems(std::list<CAccountingEntry>& acentries, std::string strAccount = "");
+
+    void MarkDirty();
+    bool AddToWallet(const CWalletTx& wtxIn, bool fFromLoadWallet, CWalletDB* pwalletdb);
+    void SyncTransaction(const CTransaction& tx, const CBlock* pblock);
+    bool AddToWalletIfInvolvingMe(const CTransaction& tx, const CBlock* pblock, bool fUpdate);
+    void EraseFromWallet(const uint256 &hash);
+    int ScanForWalletTransactions(CBlockIndex* pindexStart, bool fUpdate = false);
+    void ReacceptWalletTransactions();
+    void ResendWalletTransactions();
+    CAmount GetBalance() const;
+    CAmount GetUnconfirmedBalance() const;
+    CAmount GetImmatureBalance() const;
+    CAmount GetWatchOnlyBalance() const;
+    CAmount GetUnconfirmedWatchOnlyBalance() const;
+    CAmount GetImmatureWatchOnlyBalance() const;
+    bool CreateTransaction(const std::vector<CRecipient>& vecSend,
+                           CWalletTx& wtxNew, CReserveKey& reservekey, CAmount& nFeeRet, int& nChangePosRet, std::string& strFailReason, const CCoinControl *coinControl = NULL);
+    bool CommitTransaction(CWalletTx& wtxNew, CReserveKey& reservekey);
+
+    static CFeeRate minTxFee;
+    static CAmount GetMinimumFee(unsigned int nTxBytes, unsigned int nConfirmTarget, const CTxMemPool& pool);
+
+    bool NewKeyPool();
+    bool TopUpKeyPool(unsigned int kpSize = 0);
+    void ReserveKeyFromKeyPool(int64_t& nIndex, CKeyPool& keypool);
+    void KeepKey(int64_t nIndex);
+    void ReturnKey(int64_t nIndex);
+    bool GetKeyFromPool(CPubKey &key);
+    int64_t GetOldestKeyPoolTime();
+    void GetAllReserveKeys(std::set<CKeyID>& setAddress) const;
+
+    std::set< std::set<CTxDestination> > GetAddressGroupings();
+    std::map<CTxDestination, CAmount> GetAddressBalances();
+
+    std::set<CTxDestination> GetAccountAddresses(std::string strAccount) const;
+
+    isminetype IsMine(const CTxIn& txin) const;
+    CAmount GetDebit(const CTxIn& txin, const isminefilter& filter) const;
+    isminetype IsMine(const CTxOut& txout) const
+    {
+        return ::IsMine(*this, txout.scriptPubKey);
+    }
+    CAmount GetCredit(const CTxOut& txout, const isminefilter& filter) const
+    {
+        if (!MoneyRange(txout.nValue))
+            throw std::runtime_error("CWallet::GetCredit(): value out of range");
+        return ((IsMine(txout) & filter) ? txout.nValue : 0);
+    }
+    bool IsChange(const CTxOut& txout) const;
+    CAmount GetChange(const CTxOut& txout) const
+    {
+        if (!MoneyRange(txout.nValue))
+            throw std::runtime_error("CWallet::GetChange(): value out of range");
+        return (IsChange(txout) ? txout.nValue : 0);
+    }
+    bool IsMine(const CTransaction& tx) const
+    {
+        BOOST_FOREACH(const CTxOut& txout, tx.vout)
+            if (IsMine(txout))
+                return true;
+        return false;
+    }
+    /** should probably be renamed to IsRelevantToMe */
+    bool IsFromMe(const CTransaction& tx) const
+    {
+        return (GetDebit(tx, ISMINE_ALL) > 0);
+    }
+    CAmount GetDebit(const CTransaction& tx, const isminefilter& filter) const
+    {
+        CAmount nDebit = 0;
+        BOOST_FOREACH(const CTxIn& txin, tx.vin)
+        {
+            nDebit += GetDebit(txin, filter);
+            if (!MoneyRange(nDebit))
+                throw std::runtime_error("CWallet::GetDebit(): value out of range");
+        }
+        return nDebit;
+    }
+    CAmount GetCredit(const CTransaction& tx, const isminefilter& filter) const
+    {
+        CAmount nCredit = 0;
+        BOOST_FOREACH(const CTxOut& txout, tx.vout)
+        {
+            nCredit += GetCredit(txout, filter);
+            if (!MoneyRange(nCredit))
+                throw std::runtime_error("CWallet::GetCredit(): value out of range");
+        }
+        return nCredit;
+    }
+    CAmount GetChange(const CTransaction& tx) const
+    {
+        CAmount nChange = 0;
+        BOOST_FOREACH(const CTxOut& txout, tx.vout)
+        {
+            nChange += GetChange(txout);
+            if (!MoneyRange(nChange))
+                throw std::runtime_error("CWallet::GetChange(): value out of range");
+        }
+        return nChange;
+    }
+    void SetBestChain(const CBlockLocator& loc);
+
+    DBErrors LoadWallet(bool& fFirstRunRet);
+    DBErrors ZapWalletTx(std::vector<CWalletTx>& vWtx);
+
+    bool SetAddressBook(const CTxDestination& address, const std::string& strName, const std::string& purpose);
+
+    bool DelAddressBook(const CTxDestination& address);
+
+    void UpdatedTransaction(const uint256 &hashTx);
+
+    void Inventory(const uint256 &hash)
+    {
+        {
+            LOCK(cs_wallet);
+            std::map<uint256, int>::iterator mi = mapRequestCount.find(hash);
+            if (mi != mapRequestCount.end())
+                (*mi).second++;
+        }
+    }
+
+    unsigned int GetKeyPoolSize()
+    {
+        AssertLockHeld(cs_wallet); // setKeyPool
+        return setKeyPool.size();
+    }
+
+    bool SetDefaultKey(const CPubKey &vchPubKey);
+
+    //! signify that a particular wallet feature is now used. this may change nWalletVersion and nWalletMaxVersion if those are lower
+    bool SetMinVersion(enum WalletFeature, CWalletDB* pwalletdbIn = NULL, bool fExplicit = false);
+
+    //! change which version we're allowed to upgrade to (note that this does not immediately imply upgrading to that format)
+    bool SetMaxVersion(int nVersion);
+
+    //! get the current wallet format (the oldest client version guaranteed to understand this wallet)
+    int GetVersion() { LOCK(cs_wallet); return nWalletVersion; }
+
+    //! Get wallet transactions that conflict with given transaction (spend same outputs)
+    std::set<uint256> GetConflicts(const uint256& txid) const;
+
+    /** 
+     * Address book entry changed.
+     * @note called with lock cs_wallet held.
+     */
+    boost::signals2::signal<void (CWallet *wallet, const CTxDestination
+            &address, const std::string &label, bool isMine,
+            const std::string &purpose,
+            ChangeType status)> NotifyAddressBookChanged;
+
+    /** 
+     * Wallet transaction added, removed or updated.
+     * @note called with lock cs_wallet held.
+     */
+    boost::signals2::signal<void (CWallet *wallet, const uint256 &hashTx,
+            ChangeType status)> NotifyTransactionChanged;
+
+    /** Show progress e.g. for rescan */
+    boost::signals2::signal<void (const std::string &title, int nProgress)> ShowProgress;
+
+    /** Watch-only address added */
+    boost::signals2::signal<void (bool fHaveWatchOnly)> NotifyWatchonlyChanged;
+};
+
+/** A key allocated from the key pool. */
+class CReserveKey
+{
+protected:
+    CWallet* pwallet;
+    int64_t nIndex;
+    CPubKey vchPubKey;
+public:
+    CReserveKey(CWallet* pwalletIn)
+    {
+        nIndex = -1;
+        pwallet = pwalletIn;
+    }
+
+    ~CReserveKey()
+    {
+        ReturnKey();
+    }
+
+    void ReturnKey();
+    bool GetReservedKey(CPubKey &pubkey);
+    void KeepKey();
+};
+
+
+/** 
+ * Account information.
+ * Stored in wallet with key "acc"+string account name.
+ */
+class CAccount
+{
+public:
+    CPubKey vchPubKey;
+
+    CAccount()
+    {
+        SetNull();
+    }
+
+    void SetNull()
+    {
+        vchPubKey = CPubKey();
+    }
+
+    ADD_SERIALIZE_METHODS;
+
+    template <typename Stream, typename Operation>
+    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
+        if (!(nType & SER_GETHASH))
+            READWRITE(nVersion);
+        READWRITE(vchPubKey);
+    }
+};
+
+
+
+/** 
+ * Internal transfers.
+ * Database key is acentry<account><counter>.
+ */
+class CAccountingEntry
+{
+public:
+    std::string strAccount;
+    CAmount nCreditDebit;
+    int64_t nTime;
+    std::string strOtherAccount;
+    std::string strComment;
+    mapValue_t mapValue;
+    int64_t nOrderPos;  //! position in ordered transaction list
+    uint64_t nEntryNo;
+
+    CAccountingEntry()
+    {
+        SetNull();
+    }
+
+    void SetNull()
+    {
+        nCreditDebit = 0;
+        nTime = 0;
+        strAccount.clear();
+        strOtherAccount.clear();
+        strComment.clear();
+        nOrderPos = -1;
+        nEntryNo = 0;
+    }
+
+    ADD_SERIALIZE_METHODS;
+
+    template <typename Stream, typename Operation>
+    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
+        if (!(nType & SER_GETHASH))
+            READWRITE(nVersion);
+        //! Note: strAccount is serialized as part of the key, not here.
+        READWRITE(nCreditDebit);
+        READWRITE(nTime);
+        READWRITE(LIMITED_STRING(strOtherAccount, 65536));
+
+        if (!ser_action.ForRead())
+        {
+            WriteOrderPos(nOrderPos, mapValue);
+
+            if (!(mapValue.empty() && _ssExtra.empty()))
+            {
+                CDataStream ss(nType, nVersion);
+                ss.insert(ss.begin(), '\0');
+                ss << mapValue;
+                ss.insert(ss.end(), _ssExtra.begin(), _ssExtra.end());
+                strComment.append(ss.str());
+            }
+        }
+
+        READWRITE(LIMITED_STRING(strComment, 65536));
+
+        size_t nSepPos = strComment.find("\0", 0, 1);
+        if (ser_action.ForRead())
+        {
+            mapValue.clear();
+            if (std::string::npos != nSepPos)
+            {
+                CDataStream ss(std::vector<char>(strComment.begin() + nSepPos + 1, strComment.end()), nType, nVersion);
+                ss >> mapValue;
+                _ssExtra = std::vector<char>(ss.begin(), ss.end());
+            }
+            ReadOrderPos(nOrderPos, mapValue);
+        }
+        if (std::string::npos != nSepPos)
+            strComment.erase(nSepPos);
+
+        mapValue.erase("n");
+    }
+
+private:
+    std::vector<char> _ssExtra;
+};
+
+#endif // BITCOIN_WALLET_H