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	diff --git a/src/primitives/block.h b/src/primitives/block.h
	index c594a97f2..162553bfa 100644
	--- a/src/primitives/block.h
	+++ b/src/primitives/block.h
	@@ -1,130 +1,130 @@
	// Copyright (c) 2009-2010 Satoshi Nakamoto
	// Copyright (c) 2009-2016 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_PRIMITIVES_BLOCK_H
	#define BITCOIN_PRIMITIVES_BLOCK_H

	#include "primitives/transaction.h"
	#include "serialize.h"
	#include "uint256.h"

	/**
	* Nodes collect new transactions into a block, hash them into a hash tree, and
	* scan through nonce values to make the block's hash satisfy proof-of-work
	* requirements. When they solve the proof-of-work, they broadcast the block to
	* everyone and the block is added to the block chain. The first transaction in
	* the block is a special one that creates a new coin owned by the creator of
	* the block.
	*/
	class CBlockHeader {
	public:
	// header
	int32_t nVersion;
	uint256 hashPrevBlock;
	uint256 hashMerkleRoot;
	uint32_t nTime;
	uint32_t nBits;
	uint32_t nNonce;

	CBlockHeader() { SetNull(); }

	ADD_SERIALIZE_METHODS;

	template <typename Stream, typename Operation>
	inline void SerializationOp(Stream &s, Operation ser_action) {
	READWRITE(this->nVersion);
	READWRITE(hashPrevBlock);
	READWRITE(hashMerkleRoot);
	READWRITE(nTime);
	READWRITE(nBits);
	READWRITE(nNonce);
	}

	void SetNull() {
	nVersion = 0;
	hashPrevBlock.SetNull();
	hashMerkleRoot.SetNull();
	nTime = 0;
	nBits = 0;
	nNonce = 0;
	}

	bool IsNull() const { return (nBits == 0); }

	uint256 GetHash() const;

	int64_t GetBlockTime() const { return (int64_t)nTime; }
	};

	class CBlock : public CBlockHeader {
	public:
	// network and disk
	std::vector<CTransactionRef> vtx;

	// memory only
	mutable bool fChecked;

	CBlock() { SetNull(); }

	CBlock(const CBlockHeader &header) {
	SetNull();
	((CBlockHeader )this) = header;
	}

	ADD_SERIALIZE_METHODS;

	template <typename Stream, typename Operation>
	inline void SerializationOp(Stream &s, Operation ser_action) {
	READWRITE((CBlockHeader )this);
	READWRITE(vtx);
	}

	void SetNull() {
	CBlockHeader::SetNull();
	vtx.clear();
	fChecked = false;
	}

	CBlockHeader GetBlockHeader() const {
	CBlockHeader block;
	block.nVersion = nVersion;
	block.hashPrevBlock = hashPrevBlock;
	block.hashMerkleRoot = hashMerkleRoot;
	block.nTime = nTime;
	block.nBits = nBits;
	block.nNonce = nNonce;
	return block;
	}

	std::string ToString() const;
	};

	/**
	* Describes a place in the block chain to another node such that if the other
	* node doesn't have the same branch, it can find a recent common trunk. The
	* further back it is, the further before the fork it may be.
	*/
	struct CBlockLocator {
	std::vector<uint256> vHave;

	CBlockLocator() {}

	- CBlockLocator(const std::vector<uint256> &vHaveIn) { vHave = vHaveIn; }
	+ CBlockLocator(const std::vector<uint256> &vHaveIn) : vHave(vHaveIn) {}

	ADD_SERIALIZE_METHODS;

	template <typename Stream, typename Operation>
	inline void SerializationOp(Stream &s, Operation ser_action) {
	int nVersion = s.GetVersion();
	if (!(s.GetType() & SER_GETHASH)) READWRITE(nVersion);
	READWRITE(vHave);
	}

	void SetNull() { vHave.clear(); }

	bool IsNull() const { return vHave.empty(); }
	};

	#endif // BITCOIN_PRIMITIVES_BLOCK_H
	diff --git a/src/rpc/jsonrpcrequest.h b/src/rpc/jsonrpcrequest.h
	index 982286ee5..a014efe91 100644
	--- a/src/rpc/jsonrpcrequest.h
	+++ b/src/rpc/jsonrpcrequest.h
	@@ -1,30 +1,26 @@
	// Copyright (c) 2018 The Bitcoin developers
	// Distributed under the MIT software license, see the accompanying
	// file COPYING or http://www.opensource.org/licenses/mit-license.php.

	#ifndef BITCOIN_RPC_JSONRPCREQUEST_H
	#define BITCOIN_RPC_JSONRPCREQUEST_H

	#include <string>

	#include <univalue.h>

	class JSONRPCRequest {
	public:
	UniValue id;
	std::string strMethod;
	UniValue params;
	bool fHelp;
	std::string URI;
	std::string authUser;

	- JSONRPCRequest() {
	- id = NullUniValue;
	- params = NullUniValue;
	- fHelp = false;
	- }
	+ JSONRPCRequest() : id(NullUniValue), params(NullUniValue), fHelp(false) {}

	void parse(const UniValue &valRequest);
	};

	#endif // BITCOIN_RPC_JSONRPCREQUEST_H
	diff --git a/src/wallet/wallet.h b/src/wallet/wallet.h
	index 81493c415..25032ca80 100644
	--- a/src/wallet/wallet.h
	+++ b/src/wallet/wallet.h
	@@ -1,1211 +1,1211 @@
	// Copyright (c) 2009-2010 Satoshi Nakamoto
	// Copyright (c) 2009-2016 The Bitcoin Core developers
	// Copyright (c) 2018 The Bitcoin developers
	// Distributed under the MIT software license, see the accompanying
	// file COPYING or http://www.opensource.org/licenses/mit-license.php.

	#ifndef BITCOIN_WALLET_WALLET_H
	#define BITCOIN_WALLET_WALLET_H

	#include "amount.h"
	#include "script/ismine.h"
	#include "script/sign.h"
	#include "streams.h"
	#include "tinyformat.h"
	#include "ui_interface.h"
	#include "utilstrencodings.h"
	#include "validationinterface.h"
	#include "wallet/crypter.h"
	#include "wallet/rpcwallet.h"
	#include "wallet/walletdb.h"

	#include <boost/thread.hpp>

	#include <algorithm>
	#include <atomic>
	#include <cstdint>
	#include <map>
	#include <set>
	#include <stdexcept>
	#include <string>
	#include <utility>
	#include <vector>

	typedef CWallet *CWalletRef;
	extern std::vector<CWalletRef> vpwallets;

	/**
	* Settings
	*/
	extern CFeeRate payTxFee;
	extern unsigned int nTxConfirmTarget;
	extern bool bSpendZeroConfChange;

	static const unsigned int DEFAULT_KEYPOOL_SIZE = 1000;
	//! -paytxfee default
	static const Amount DEFAULT_TRANSACTION_FEE = Amount::zero();
	//! -fallbackfee default
	static const Amount DEFAULT_FALLBACK_FEE(20000 * SATOSHI);
	//! minimum recommended increment for BIP 125 replacement txs
	static const Amount WALLET_INCREMENTAL_RELAY_FEE(5000 * SATOSHI);
	//! target minimum change amount
	static const Amount MIN_CHANGE = CENT;
	//! final minimum change amount after paying for fees
	static const Amount MIN_FINAL_CHANGE = MIN_CHANGE / 2;
	//! Default for -spendzeroconfchange
	static const bool DEFAULT_SPEND_ZEROCONF_CHANGE = true;
	//! Default for -walletrejectlongchains
	static const bool DEFAULT_WALLET_REJECT_LONG_CHAINS = false;
	//! -txconfirmtarget default
	static const unsigned int DEFAULT_TX_CONFIRM_TARGET = 6;
	//! Largest (in bytes) free transaction we're willing to create
	static const unsigned int MAX_FREE_TRANSACTION_CREATE_SIZE = 1000;
	static const bool DEFAULT_WALLETBROADCAST = true;
	static const bool DEFAULT_DISABLE_WALLET = false;
	//! if set, all keys will be derived by using BIP32
	static const bool DEFAULT_USE_HD_WALLET = true;

	extern const char *DEFAULT_WALLET_DAT;

	static const int64_t TIMESTAMP_MIN = 0;

	class CBlockIndex;
	class CChainParams;
	class CCoinControl;
	class COutput;
	class CReserveKey;
	class CScript;
	class CScheduler;
	class CTxMemPool;
	class CWalletTx;

	/** (client) version numbers for particular wallet features */
	enum WalletFeature {
	// the earliest version new wallets supports (only useful for getinfo's
	// clientversion output)
	FEATURE_BASE = 10500,

	// wallet encryption
	FEATURE_WALLETCRYPT = 40000,
	// compressed public keys
	FEATURE_COMPRPUBKEY = 60000,

	// Hierarchical key derivation after BIP32 (HD Wallet)
	FEATURE_HD = 130000,

	// Wallet with HD chain split (change outputs will use m/0'/1'/k)
	FEATURE_HD_SPLIT = 160300,

	// HD is optional, use FEATURE_COMPRPUBKEY as latest version
	FEATURE_LATEST = FEATURE_COMPRPUBKEY,
	};

	/** A key pool entry */
	class CKeyPool {
	public:
	int64_t nTime;
	CPubKey vchPubKey;
	bool fInternal; // for change outputs

	CKeyPool();
	CKeyPool(const CPubKey &vchPubKeyIn, bool internalIn);

	ADD_SERIALIZE_METHODS;

	template <typename Stream, typename Operation>
	inline void SerializationOp(Stream &s, Operation ser_action) {
	int nVersion = s.GetVersion();
	if (!(s.GetType() & SER_GETHASH)) {
	READWRITE(nVersion);
	}

	READWRITE(nTime);
	READWRITE(vchPubKey);
	if (ser_action.ForRead()) {
	try {
	READWRITE(fInternal);
	} catch (std::ios_base::failure &) {
	/**
	* flag as external address if we can't read the internal
	* boolean
	* (this will be the case for any wallet before the HD chain
	* split version)
	*/
	fInternal = false;
	}
	} else {
	READWRITE(fInternal);
	}
	}
	};

	/** Address book data */
	class CAddressBookData {
	public:
	std::string name;
	std::string purpose;

	- CAddressBookData() { purpose = "unknown"; }
	+ CAddressBookData() : purpose("unknown") {}

	typedef std::map<std::string, std::string> StringMap;
	StringMap destdata;
	};

	struct CRecipient {
	CScript scriptPubKey;
	Amount nAmount;
	bool fSubtractFeeFromAmount;
	};

	typedef std::map<std::string, std::string> mapValue_t;

	static inline void ReadOrderPos(int64_t &nOrderPos, mapValue_t &mapValue) {
	if (!mapValue.count("n")) {
	// TODO: calculate elsewhere
	nOrderPos = -1;
	return;
	}

	nOrderPos = atoi64(mapValue["n"].c_str());
	}

	static inline void WriteOrderPos(const int64_t &nOrderPos,
	mapValue_t &mapValue) {
	if (nOrderPos == -1) return;
	mapValue["n"] = i64tostr(nOrderPos);
	}

	struct COutputEntry {
	CTxDestination destination;
	Amount amount;
	int vout;
	};

	/** A transaction with a merkle branch linking it to the block chain. */
	class CMerkleTx {
	private:
	/** Constant used in hashBlock to indicate tx has been abandoned */
	static const uint256 ABANDON_HASH;

	public:
	CTransactionRef tx;
	uint256 hashBlock;

	/**
	* An nIndex == -1 means that hashBlock (in nonzero) refers to the earliest
	* block in the chain we know this or any in-wallet dependency conflicts
	* with. Older clients interpret nIndex == -1 as unconfirmed for backward
	* compatibility.
	*/
	int nIndex;

	CMerkleTx() {
	SetTx(MakeTransactionRef());
	Init();
	}

	CMerkleTx(CTransactionRef arg) {
	SetTx(std::move(arg));
	Init();
	}

	/**
	* Helper conversion operator to allow passing CMerkleTx where CTransaction
	* is expected.
	* TODO: adapt callers and remove this operator.
	*/
	operator const CTransaction &() const { return *tx; }

	void Init() {
	hashBlock = uint256();
	nIndex = -1;
	}

	void SetTx(CTransactionRef arg) { tx = std::move(arg); }

	ADD_SERIALIZE_METHODS;

	template <typename Stream, typename Operation>
	inline void SerializationOp(Stream &s, Operation ser_action) {
	// For compatibility with older versions.
	std::vector<uint256> vMerkleBranch;
	READWRITE(tx);
	READWRITE(hashBlock);
	READWRITE(vMerkleBranch);
	READWRITE(nIndex);
	}

	void SetMerkleBranch(const CBlockIndex *pIndex, int posInBlock);

	/**
	* Return depth of transaction in blockchain:
	* <0 : conflicts with a transaction this deep in the blockchain
	* 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 GetDepthInMainChain(pindexRet) > 0;
	}
	/**
	* @return number of blocks to maturity for this transaction:
	* 0 : is not a coinbase transaction, or is a mature coinbase transaction
	* >0 : is a coinbase transaction which matures in this many blocks
	*/
	int GetBlocksToMaturity() const;
	/**
	* Pass this transaction to the mempool. Fails if absolute fee exceeds
	* absurd fee.
	*/
	bool AcceptToMemoryPool(const Amount nAbsurdFee, CValidationState &state);
	bool hashUnset() const {
	return (hashBlock.IsNull() \|\| hashBlock == ABANDON_HASH);
	}
	bool isAbandoned() const { return (hashBlock == ABANDON_HASH); }
	void setAbandoned() { hashBlock = ABANDON_HASH; }

	TxId GetId() const { return tx->GetId(); }
	bool IsCoinBase() const { return tx->IsCoinBase(); }
	bool IsImmatureCoinBase() const;
	};

	/**
	* 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;
	//!< time received by this node
	unsigned int nTimeReceived;
	/**
	* Stable timestamp that never changes, and reflects the order a transaction
	* was added to the wallet. Timestamp is based on the block time for a
	* transaction added as part of a block, or else the time when the
	* transaction was received if it wasn't part of a block, with the timestamp
	* adjusted in both cases so timestamp order matches the order transactions
	* were added to the wallet. More details can be found in
	* CWallet::ComputeTimeSmart().
	*/
	unsigned int nTimeSmart;
	/**
	* From me flag is set to 1 for transactions that were created by the wallet
	* on this bitcoin node, and set to 0 for transactions that were created
	* externally and came in through the network or sendrawtransaction RPC.
	*/
	char fFromMe;
	std::string strFromAccount;
	//!< position in ordered transaction list
	int64_t nOrderPos;

	// 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 Amount nDebitCached;
	mutable Amount nCreditCached;
	mutable Amount nImmatureCreditCached;
	mutable Amount nAvailableCreditCached;
	mutable Amount nWatchDebitCached;
	mutable Amount nWatchCreditCached;
	mutable Amount nImmatureWatchCreditCached;
	mutable Amount nAvailableWatchCreditCached;
	mutable Amount nChangeCached;

	CWalletTx() { Init(nullptr); }

	CWalletTx(const CWallet *pwalletIn, CTransactionRef arg)
	: CMerkleTx(std::move(arg)) {
	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 = Amount::zero();
	nCreditCached = Amount::zero();
	nImmatureCreditCached = Amount::zero();
	nAvailableCreditCached = Amount::zero();
	nWatchDebitCached = Amount::zero();
	nWatchCreditCached = Amount::zero();
	nAvailableWatchCreditCached = Amount::zero();
	nImmatureWatchCreditCached = Amount::zero();
	nChangeCached = Amount::zero();
	nOrderPos = -1;
	}

	ADD_SERIALIZE_METHODS;

	template <typename Stream, typename Operation>
	inline void SerializationOp(Stream &s, Operation ser_action) {
	if (ser_action.ForRead()) {
	Init(nullptr);
	}

	char fSpent = false;

	if (!ser_action.ForRead()) {
	mapValue["fromaccount"] = strFromAccount;
	WriteOrderPos(nOrderPos, mapValue);
	if (nTimeSmart) {
	mapValue["timesmart"] = strprintf("%u", nTimeSmart);
	}
	}

	READWRITE((CMerkleTx )this);
	//!< Used to be vtxPrev
	std::vector<CMerkleTx> vUnused;
	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;
	fImmatureCreditCached = 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
	Amount GetDebit(const isminefilter &filter) const;
	Amount GetCredit(const isminefilter &filter) const;
	Amount GetImmatureCredit(bool fUseCache = true) const;
	Amount GetAvailableCredit(bool fUseCache = true) const;
	Amount GetImmatureWatchOnlyCredit(const bool &fUseCache = true) const;
	Amount GetAvailableWatchOnlyCredit(const bool &fUseCache = true) const;
	Amount GetChange() const;

	void GetAmounts(std::list<COutputEntry> &listReceived,
	std::list<COutputEntry> &listSent, Amount &nFee,
	std::string &strSentAccount,
	const isminefilter &filter) const;

	bool IsFromMe(const isminefilter &filter) const {
	return GetDebit(filter) > Amount::zero();
	}

	// True if only scriptSigs are different
	bool IsEquivalentTo(const CWalletTx &tx) const;

	bool InMempool() const;
	bool IsTrusted() const;

	int64_t GetTxTime() const;
	int GetRequestCount() const;

	// RelayWalletTransaction may only be called if fBroadcastTransactions!
	bool RelayWalletTransaction(CConnman *connman);

	std::set<TxId> GetConflicts() const;
	};

	class COutput {
	public:
	const CWalletTx *tx;
	int i;
	int nDepth;

	/** Whether we have the private keys to spend this output */
	bool fSpendable;

	/** Whether we know how to spend this output, ignoring the lack of keys */
	bool fSolvable;

	/**
	* Whether this output is considered safe to spend. Unconfirmed transactions
	* from outside keys are considered unsafe and will not be used to fund new
	* spending transactions.
	*/
	bool fSafe;

	COutput(const CWalletTx *txIn, int iIn, int nDepthIn, bool fSpendableIn,
	bool fSolvableIn, bool fSafeIn) {
	tx = txIn;
	i = iIn;
	nDepth = nDepthIn;
	fSpendable = fSpendableIn;
	fSolvable = fSolvableIn;
	fSafe = fSafeIn;
	}

	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 nVersion = s.GetVersion();
	if (!(s.GetType() & SER_GETHASH)) READWRITE(nVersion);
	READWRITE(vchPrivKey);
	READWRITE(nTimeCreated);
	READWRITE(nTimeExpires);
	READWRITE(LIMITED_STRING(strComment, 65536));
	}
	};

	/**
	* Internal transfers.
	* Database key is acentry<account><counter>.
	*/
	class CAccountingEntry {
	public:
	std::string strAccount;
	Amount nCreditDebit;
	int64_t nTime;
	std::string strOtherAccount;
	std::string strComment;
	mapValue_t mapValue;
	//!< position in ordered transaction list
	int64_t nOrderPos;
	uint64_t nEntryNo;

	CAccountingEntry() { SetNull(); }

	void SetNull() {
	nCreditDebit = Amount::zero();
	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 nVersion = s.GetVersion();
	if (!(s.GetType() & 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(s.GetType(), s.GetVersion());
	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()),
	s.GetType(), s.GetVersion());
	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;
	};

	/**
	* 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 final : public CCryptoKeyStore, public CValidationInterface {
	private:
	static std::atomic<bool> fFlushScheduled;
	std::atomic<bool> fAbortRescan;
	std::atomic<bool> fScanningWallet;

	/**
	* Select a set of coins such that nValueRet >= nTargetValue and at least
	* all coins from coinControl are selected; Never select unconfirmed coins
	* if they are not ours.
	*/
	bool SelectCoins(
	const std::vector<COutput> &vAvailableCoins, const Amount nTargetValue,
	std::set<std::pair<const CWalletTx *, unsigned int>> &setCoinsRet,
	Amount &nValueRet, const CCoinControl *coinControl = nullptr) 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;
	bool fBroadcastTransactions;

	/**
	* 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, TxId> TxSpends;
	TxSpends mapTxSpends;
	void AddToSpends(const COutPoint &outpoint, const TxId &wtxid);
	void AddToSpends(const TxId &wtxid);

	/**
	* Mark a transaction (and its in-wallet descendants) as conflicting with a
	* particular block.
	*/
	void MarkConflicted(const uint256 &hashBlock, const TxId &txid);

	void SyncMetaData(std::pair<TxSpends::iterator, TxSpends::iterator>);

	/**
	* Used by TransactionAddedToMemorypool/BlockConnected/Disconnected.
	* Should be called with pindexBlock and posInBlock if this is for a
	* transaction that is included in a block.
	*/
	void SyncTransaction(const CTransactionRef &tx,
	const CBlockIndex *pindex = nullptr,
	int posInBlock = 0);

	/* the HD chain data model (external chain counters) */
	CHDChain hdChain;

	/* HD derive new child key (on internal or external chain) */
	void DeriveNewChildKey(CWalletDB &walletdb, CKeyMetadata &metadata,
	CKey &secret, bool internal = false);

	std::set<int64_t> setInternalKeyPool;
	std::set<int64_t> setExternalKeyPool;
	int64_t m_max_keypool_index;
	std::map<CKeyID, int64_t> m_pool_key_to_index;

	int64_t nTimeFirstKey;

	/**
	* Private version of AddWatchOnly method which does not accept a timestamp,
	* and which will reset the wallet's nTimeFirstKey value to 1 if the watch
	* key did not previously have a timestamp associated with it. Because this
	* is an inherited virtual method, it is accessible despite being marked
	* private, but it is marked private anyway to encourage use of the other
	* AddWatchOnly which accepts a timestamp and sets nTimeFirstKey more
	* intelligently for more efficient rescans.
	*/
	bool AddWatchOnly(const CScript &dest) override;

	std::unique_ptr<CWalletDBWrapper> dbw;

	public:
	const CChainParams &chainParams;
	/*
	* Main wallet lock.
	* This lock protects all the fields added by CWallet.
	*/
	mutable CCriticalSection cs_wallet;

	/**
	* Get database handle used by this wallet. Ideally this function would not
	* be necessary.
	*/
	CWalletDBWrapper &GetDBHandle() { return *dbw; }

	/**
	* Get a name for this wallet for logging/debugging purposes.
	*/
	std::string GetName() const {
	if (dbw) {
	return dbw->GetName();
	} else {
	return "dummy";
	}
	}

	void LoadKeyPool(int64_t nIndex, const CKeyPool &keypool);

	// Map from Key ID (for regular keys) or Script ID (for watch-only keys) to
	// key metadata.
	std::map<CTxDestination, CKeyMetadata> mapKeyMetadata;

	typedef std::map<unsigned int, CMasterKey> MasterKeyMap;
	MasterKeyMap mapMasterKeys;
	unsigned int nMasterKeyMaxID;

	// Create wallet with dummy database handle
	CWallet(const CChainParams &chainParamsIn)
	: dbw(new CWalletDBWrapper()), chainParams(chainParamsIn) {
	SetNull();
	}

	// Create wallet with passed-in database handle
	CWallet(const CChainParams &chainParamsIn,
	std::unique_ptr<CWalletDBWrapper> dbw_in)
	: dbw(std::move(dbw_in)), chainParams(chainParamsIn) {
	SetNull();
	}

	~CWallet() {
	delete pwalletdbEncryption;
	pwalletdbEncryption = nullptr;
	}

	void SetNull() {
	nWalletVersion = FEATURE_BASE;
	nWalletMaxVersion = FEATURE_BASE;
	nMasterKeyMaxID = 0;
	pwalletdbEncryption = nullptr;
	nOrderPosNext = 0;
	nAccountingEntryNumber = 0;
	nNextResend = 0;
	nLastResend = 0;
	m_max_keypool_index = 0;
	nTimeFirstKey = 0;
	fBroadcastTransactions = false;
	fAbortRescan = false;
	fScanningWallet = false;
	}

	std::map<TxId, CWalletTx> mapWallet;
	std::list<CAccountingEntry> laccentries;

	typedef std::pair<CWalletTx , CAccountingEntry > TxPair;
	typedef std::multimap<int64_t, TxPair> TxItems;
	TxItems wtxOrdered;

	int64_t nOrderPosNext;
	uint64_t nAccountingEntryNumber;
	std::map<uint256, int> mapRequestCount;

	std::map<CTxDestination, CAddressBookData> mapAddressBook;

	std::set<COutPoint> setLockedCoins;

	const CWalletTx *GetWalletTx(const TxId &txid) const;

	//! check whether we are allowed to upgrade (or already support) to the
	//! named feature
	bool CanSupportFeature(enum WalletFeature wf) const {
	AssertLockHeld(cs_wallet);
	return nWalletMaxVersion >= wf;
	}

	/**
	* populate vCoins with vector of available COutputs.
	*/
	void AvailableCoins(std::vector<COutput> &vCoins, bool fOnlySafe = true,
	const CCoinControl *coinControl = nullptr,
	const Amount nMinimumAmount = SATOSHI,
	const Amount nMaximumAmount = MAX_MONEY,
	const Amount nMinimumSumAmount = MAX_MONEY,
	const uint64_t &nMaximumCount = 0,
	const int &nMinDepth = 0,
	const int &nMaxDepth = 9999999) const;

	/**
	* Shuffle and select coins until nTargetValue is reached while avoiding
	* small change; This method is stochastic for some inputs and upon
	* completion the coin set and corresponding actual target value is
	* assembled.
	*/
	bool SelectCoinsMinConf(
	const Amount nTargetValue, int nConfMine, int nConfTheirs,
	uint64_t nMaxAncestors, std::vector<COutput> vCoins,
	std::set<std::pair<const CWalletTx *, unsigned int>> &setCoinsRet,
	Amount &nValueRet) const;

	bool IsSpent(const TxId &txid, uint32_t n) const;

	bool IsLockedCoin(const TxId &txid, uint32_t n) const;
	void LockCoin(const COutPoint &output);
	void UnlockCoin(const COutPoint &output);
	void UnlockAllCoins();
	void ListLockedCoins(std::vector<COutPoint> &vOutpts);

	/*
	* Rescan abort properties
	*/
	void AbortRescan() { fAbortRescan = true; }
	bool IsAbortingRescan() { return fAbortRescan; }
	bool IsScanning() { return fScanningWallet; }

	/**
	* keystore implementation
	* Generate a new key
	*/
	CPubKey GenerateNewKey(CWalletDB &walletdb, bool internal = false);
	//! Adds a key to the store, and saves it to disk.
	bool AddKeyPubKey(const CKey &key, const CPubKey &pubkey) override;
	bool AddKeyPubKeyWithDB(CWalletDB &walletdb, 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 CTxDestination &pubKey,
	const CKeyMetadata &metadata);

	bool LoadMinVersion(int nVersion) {
	AssertLockHeld(cs_wallet);
	nWalletVersion = nVersion;
	nWalletMaxVersion = std::max(nWalletMaxVersion, nVersion);
	return true;
	}
	void UpdateTimeFirstKey(int64_t nCreateTime);

	//! Adds an encrypted key to the store, and saves it to disk.
	bool AddCryptedKey(const CPubKey &vchPubKey,
	const std::vector<uint8_t> &vchCryptedSecret) override;
	//! Adds an encrypted key to the store, without saving it to disk (used by
	//! LoadWallet)
	bool LoadCryptedKey(const CPubKey &vchPubKey,
	const std::vector<uint8_t> &vchCryptedSecret);
	bool AddCScript(const CScript &redeemScript) override;
	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, int64_t nCreateTime);
	bool RemoveWatchOnly(const CScript &dest) override;
	//! Adds a watch-only address to the store, without saving it to disk (used
	//! by LoadWallet)
	bool LoadWatchOnly(const CScript &dest);

	//! Holds a timestamp at which point the wallet is scheduled (externally) to
	//! be relocked. Caller must arrange for actual relocking to occur via
	//! Lock().
	int64_t nRelockTime;

	bool Unlock(const SecureString &strWalletPassphrase);
	bool ChangeWalletPassphrase(const SecureString &strOldWalletPassphrase,
	const SecureString &strNewWalletPassphrase);
	bool EncryptWallet(const SecureString &strWalletPassphrase);

	void GetKeyBirthTimes(std::map<CTxDestination, int64_t> &mapKeyBirth) const;
	unsigned int ComputeTimeSmart(const CWalletTx &wtx) const;

	/**
	* Increment the next transaction order id
	* @return next transaction order id
	*/
	int64_t IncOrderPosNext(CWalletDB *pwalletdb = nullptr);
	DBErrors ReorderTransactions();
	bool AccountMove(std::string strFrom, std::string strTo,
	const Amount nAmount, std::string strComment = "");
	bool GetLabelAddress(CPubKey &pubKey, const std::string &label,
	bool bForceNew = false);

	void MarkDirty();
	bool AddToWallet(const CWalletTx &wtxIn, bool fFlushOnClose = true);
	bool LoadToWallet(const CWalletTx &wtxIn);
	void TransactionAddedToMempool(const CTransactionRef &tx) override;
	void
	BlockConnected(const std::shared_ptr<const CBlock> &pblock,
	const CBlockIndex *pindex,
	const std::vector<CTransactionRef> &vtxConflicted) override;
	void
	BlockDisconnected(const std::shared_ptr<const CBlock> &pblock) override;
	bool AddToWalletIfInvolvingMe(const CTransactionRef &tx,
	const CBlockIndex *pIndex, int posInBlock,
	bool fUpdate);
	int64_t RescanFromTime(int64_t startTime, bool update);
	CBlockIndex ScanForWalletTransactions(CBlockIndex pindexStart,
	CBlockIndex *pindexStop,
	bool fUpdate = false);
	void ReacceptWalletTransactions();
	void ResendWalletTransactions(int64_t nBestBlockTime,
	CConnman *connman) override;
	// ResendWalletTransactionsBefore may only be called if
	// fBroadcastTransactions!
	std::vector<uint256> ResendWalletTransactionsBefore(int64_t nTime,
	CConnman *connman);
	Amount GetBalance() const;
	Amount GetUnconfirmedBalance() const;
	Amount GetImmatureBalance() const;
	Amount GetWatchOnlyBalance() const;
	Amount GetUnconfirmedWatchOnlyBalance() const;
	Amount GetImmatureWatchOnlyBalance() const;
	Amount GetLegacyBalance(const isminefilter &filter, int minDepth,
	const std::string *account) const;

	/**
	* Insert additional inputs into the transaction by calling
	* CreateTransaction();
	*/
	bool FundTransaction(CMutableTransaction &tx, Amount &nFeeRet,
	bool overrideEstimatedFeeRate,
	const CFeeRate &specificFeeRate, int &nChangePosInOut,
	std::string &strFailReason, bool includeWatching,
	bool lockUnspents,
	const std::set<int> &setSubtractFeeFromOutputs,
	bool keepReserveKey = true,
	const CTxDestination &destChange = CNoDestination());

	/**
	* Create a new transaction paying the recipients with a set of coins
	* selected by SelectCoins(); Also create the change output, when needed
	* @note passing nChangePosInOut as -1 will result in setting a random
	* position
	*/
	bool CreateTransaction(const std::vector<CRecipient> &vecSend,
	CWalletTx &wtxNew, CReserveKey &reservekey,
	Amount &nFeeRet, int &nChangePosInOut,
	std::string &strFailReason,
	const CCoinControl *coinControl = nullptr,
	bool sign = true);
	bool CommitTransaction(CWalletTx &wtxNew, CReserveKey &reservekey,
	CConnman *connman, CValidationState &state);

	void ListAccountCreditDebit(const std::string &strAccount,
	std::list<CAccountingEntry> &entries);
	bool AddAccountingEntry(const CAccountingEntry &);
	bool AddAccountingEntry(const CAccountingEntry &, CWalletDB *pwalletdb);
	template <typename ContainerType>
	bool DummySignTx(CMutableTransaction &txNew, const ContainerType &coins);

	static CFeeRate fallbackFee;

	bool NewKeyPool();
	size_t KeypoolCountExternalKeys();
	bool TopUpKeyPool(unsigned int kpSize = 0);
	void ReserveKeyFromKeyPool(int64_t &nIndex, CKeyPool &keypool,
	bool fRequestedInternal);
	void KeepKey(int64_t nIndex);
	void ReturnKey(int64_t nIndex, bool fInternal, const CPubKey &pubkey);
	bool GetKeyFromPool(CPubKey &key, bool internal = false);
	int64_t GetOldestKeyPoolTime();
	/**
	* Marks all keys in the keypool up to and including reserve_key as used.
	*/
	void MarkReserveKeysAsUsed(int64_t keypool_id);
	const std::map<CKeyID, int64_t> &GetAllReserveKeys() const {
	return m_pool_key_to_index;
	}
	/** Does the wallet have at least min_keys in the keypool? */
	bool HasUnusedKeys(size_t min_keys) const;

	std::set<std::set<CTxDestination>> GetAddressGroupings();
	std::map<CTxDestination, Amount> GetAddressBalances();

	std::set<CTxDestination> GetLabelAddresses(const std::string &label) const;

	isminetype IsMine(const CTxIn &txin) const;
	/**
	* Returns amount of debit if the input matches the filter, otherwise
	* returns 0
	*/
	Amount GetDebit(const CTxIn &txin, const isminefilter &filter) const;
	isminetype IsMine(const CTxOut &txout) const;
	Amount GetCredit(const CTxOut &txout, const isminefilter &filter) const;
	bool IsChange(const CTxOut &txout) const;
	Amount GetChange(const CTxOut &txout) const;
	bool IsMine(const CTransaction &tx) const;
	/** should probably be renamed to IsRelevantToMe */
	bool IsFromMe(const CTransaction &tx) const;
	Amount GetDebit(const CTransaction &tx, const isminefilter &filter) const;
	/** Returns whether all of the inputs match the filter */
	bool IsAllFromMe(const CTransaction &tx, const isminefilter &filter) const;
	Amount GetCredit(const CTransaction &tx, const isminefilter &filter) const;
	Amount GetChange(const CTransaction &tx) const;
	void SetBestChain(const CBlockLocator &loc) override;

	DBErrors LoadWallet(bool &fFirstRunRet);
	DBErrors ZapWalletTx(std::vector<CWalletTx> &vWtx);
	DBErrors ZapSelectTx(std::vector<TxId> &txIdsIn,
	std::vector<TxId> &txIdsOut);

	bool SetAddressBook(const CTxDestination &address,
	const std::string &strName, const std::string &purpose);

	bool DelAddressBook(const CTxDestination &address);

	const std::string &GetLabelName(const CScript &scriptPubKey) const;

	void Inventory(const uint256 &hash) override {
	LOCK(cs_wallet);
	std::map<uint256, int>::iterator mi = mapRequestCount.find(hash);
	if (mi != mapRequestCount.end()) {
	(*mi).second++;
	}
	}

	void GetScriptForMining(std::shared_ptr<CReserveScript> &script);

	unsigned int GetKeyPoolSize() {
	// set{Ex,In}ternalKeyPool
	AssertLockHeld(cs_wallet);
	return setInternalKeyPool.size() + setExternalKeyPool.size();
	}

	//! 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 = nullptr,
	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<TxId> GetConflicts(const TxId &txid) const;

	//! Check if a given transaction has any of its outputs spent by another
	//! transaction in the wallet
	bool HasWalletSpend(const TxId &txid) const;

	//! Flush wallet (bitdb flush)
	void Flush(bool shutdown = false);

	/**
	* 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 TxId &txid,
	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;

	/** Inquire whether this wallet broadcasts transactions. */
	bool GetBroadcastTransactions() const { return fBroadcastTransactions; }
	/** Set whether this wallet broadcasts transactions. */
	void SetBroadcastTransactions(bool broadcast) {
	fBroadcastTransactions = broadcast;
	}

	/**
	* Mark a transaction (and it in-wallet descendants) as abandoned so its
	* inputs may be respent.
	*/
	bool AbandonTransaction(const TxId &txid);

	/**
	* Initializes the wallet, returns a new CWallet instance or a null pointer
	* in case of an error.
	*/
	static CWallet *CreateWalletFromFile(const CChainParams &chainParams,
	const std::string walletFile);

	/**
	* Wallet post-init setup
	* Gives the wallet a chance to register repetitive tasks and complete
	* post-init tasks
	*/
	void postInitProcess(CScheduler &scheduler);

	bool BackupWallet(const std::string &strDest);

	/* Set the HD chain model (chain child index counters) */
	bool SetHDChain(const CHDChain &chain, bool memonly);
	const CHDChain &GetHDChain() { return hdChain; }

	/* Returns true if HD is enabled */
	bool IsHDEnabled();

	/* Generates a new HD master key (will not be activated) */
	CPubKey GenerateNewHDMasterKey();

	/**
	* Set the current HD master key (will reset the chain child index counters)
	* If possibleOldChain is provided, the parameters from the old chain
	* (version) will be preserved.
	*/
	bool SetHDMasterKey(const CPubKey &key,
	CHDChain *possibleOldChain = nullptr);
	};

	/** A key allocated from the key pool. */
	class CReserveKey final : public CReserveScript {
	protected:
	CWallet *pwallet;
	int64_t nIndex;
	CPubKey vchPubKey;
	bool fInternal;

	public:
	CReserveKey(CWallet *pwalletIn) {
	nIndex = -1;
	pwallet = pwalletIn;
	fInternal = false;
	}

	~CReserveKey() { ReturnKey(); }

	void ReturnKey();
	bool GetReservedKey(CPubKey &pubkey, bool internal = false);
	void KeepKey();
	void KeepScript() override { 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 nVersion = s.GetVersion();
	if (!(s.GetType() & SER_GETHASH)) {
	READWRITE(nVersion);
	}

	READWRITE(vchPubKey);
	}
	};

	// Helper for producing a bunch of max-sized low-S signatures (eg 72 bytes)
	// ContainerType is meant to hold pair<CWalletTx *, int>, and be iterable so
	// that each entry corresponds to each vIn, in order.
	template <typename ContainerType>
	bool CWallet::DummySignTx(CMutableTransaction &txNew,
	const ContainerType &coins) {
	// Fill in dummy signatures for fee calculation.
	int nIn = 0;
	for (const auto &coin : coins) {
	const CScript &scriptPubKey =
	coin.first->tx->vout[coin.second].scriptPubKey;
	SignatureData sigdata;

	if (!ProduceSignature(DummySignatureCreator(this), scriptPubKey,
	sigdata)) {
	return false;
	} else {
	UpdateTransaction(txNew, nIn, sigdata);
	}

	nIn++;
	}

	return true;
	}

	#endif // BITCOIN_WALLET_WALLET_H

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