diff --git a/src/Makefile.am b/src/Makefile.am
index f7abab482e9..ba6f80d496b 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -104,6 +104,9 @@ BITCOIN_CORE_H = \
   httpserver.h \
   indirectmap.h \
   init.h \
+  ipc/interfaces.h \
+  ipc/local/interfaces.h \
+  ipc/util.h \
   key.h \
   keystore.h \
   dbwrapper.h \
@@ -341,6 +344,8 @@ libbitcoin_util_a_SOURCES = \
   compat/glibcxx_sanity.cpp \
   compat/strnlen.cpp \
   fs.cpp \
+  ipc/interfaces.cpp \
+  ipc/local/interfaces.cpp \
   random.cpp \
   rpc/protocol.cpp \
   support/cleanse.cpp \
diff --git a/src/ipc/README.md b/src/ipc/README.md
new file mode 100644
index 00000000000..2c2394d9f1f
--- /dev/null
+++ b/src/ipc/README.md
@@ -0,0 +1,64 @@
+src/ipc -- Bitcoin Interprocess Communication
+=============================================
+
+The IPC functions and classes in [`src/ipc`](.) define interfaces that allow
+bitcoin code running in separate processes to communicate.
+
+The interfaces are designed to be protocol agnostic, so support for different
+IPC mechanisms (Capn'Proto, gRPC, JSON-RPC, or custom protocols) could be added
+without having to change application code outside the [`src/ipc`](.) directory.
+
+The interfaces are also expected to evolve over time, to allow gradually
+increasing bitcoin code modularity, starting with a simple division between
+bitcoin GUI (`bitcoin-qt`) and bitcoind daemon (`bitcoind`) code, and
+supporting more subdivisions in the future, such as subdivisions between
+bitcoin wallet code and bitcoin P2P networking code, or between P2P networking
+and database storage code.
+
+Current Status
+--------------
+
+* [`src/ipc/interfaces.h`](interfaces.h) currently contains interfaces
+  `ipc::Node` and `ipc::Wallet` allowing the bitcoin GUI to access bitcoin
+  node and wallet functionality. More interfaces could be added in the future.
+* [`src/ipc/interfaces.h`](interfaces.h) currently only defines a `LOCAL` IPC protocol
+  for calling functionality already linked into the current process. The first
+  implementation of a remote protocol allowing real interprocess communication
+  is added in PR [#10102](https://github.com/bitcoin/bitcoin/pull/10102).
+
+FAQ
+---
+
+### Does having an IPC layer make Qt model classes redundant?
+
+The IPC layer is complementary to the Qt model classes. The IPC layer is only a
+simple shim wrapping a selection of node and wallet functions that the GUI
+needs access to. No real functionality is implemented there, and the most
+complicated thing any IPC method in
+[src/ipc/local/interfaces.cpp](local/interfaces.cpp) should do is a call a
+single bitcoin function, or batch a few function calls together and group their
+results.
+
+All real functionality is implemented outside of the IPC layer, either above it
+in Qt model classes, or below it in bitcoin node and wallet code. The Qt model
+classes in ([src/qt/walletmodel.cpp](../qt/walletmodel.cpp)),
+([src/qt/clientmodel.cpp](../qt/clientmodel.cpp), etc) are the best place to
+implement functionality that's useful to GUI code but not useful to other parts
+of bitcoin.
+
+Examples of expected code organization:
+
+* `WalletImpl::getBalances()` in
+  [src/ipc/local/interfaces.cpp](local/interfaces.cpp) shows a typical IPC
+  method implementation which groups together the results of a few lower-level
+  bitcoin calls, but does not implement any real functionality of its own.
+
+* PR [#10231](https://github.com/bitcoin/bitcoin/pull/10231), which adds caching
+  of header information to GUI, shows an example of the type of functionality
+  that belongs in Qt model classes. The caching it adds could have been
+  implemented at a lower level, but it belongs in Qt because the information it
+  tracks is only useful to the GUI.
+
+* PR [#10251](https://github.com/bitcoin/bitcoin/pull/10251), which adds caching
+  of balance information, is useful to both the GUI and the JSON-RPC interfaces,
+  so was implemented at a lower level.
diff --git a/src/ipc/interfaces.cpp b/src/ipc/interfaces.cpp
new file mode 100644
index 00000000000..88f18c32e86
--- /dev/null
+++ b/src/ipc/interfaces.cpp
@@ -0,0 +1,15 @@
+#include "ipc/interfaces.h"
+
+#include "ipc/local/interfaces.h"
+
+namespace ipc {
+
+std::unique_ptr<Node> MakeNode(Protocol protocol)
+{
+    if (protocol == LOCAL) {
+        return local::MakeNode();
+    }
+    return {};
+}
+
+} // namespace ipc
diff --git a/src/ipc/interfaces.h b/src/ipc/interfaces.h
new file mode 100644
index 00000000000..3b6664be720
--- /dev/null
+++ b/src/ipc/interfaces.h
@@ -0,0 +1,575 @@
+#ifndef BITCOIN_IPC_INTERFACES_H
+#define BITCOIN_IPC_INTERFACES_H
+
+#include "addrdb.h"                    // For banmap_t
+#include "init.h"                      // For HelpMessageMode
+#include "net.h"                       // For CConnman::NumConnections
+#include "netaddress.h"                // For Network
+#include "pubkey.h"                    // For CTxDestination (CKeyID and CScriptID)
+#include "script/ismine.h"             // isminefilter, isminetype
+#include "script/standard.h"           // For CTxDestination
+#include "support/allocators/secure.h" // For SecureString
+#include "ui_interface.h"              // For ChangeType
+
+#include <memory>
+#include <set>
+#include <string>
+#include <tuple>
+#include <vector>
+
+class CCoinControl;
+class CKey;
+class CNodeStats;
+class CValidationState;
+class Coin;
+class RPCTimerInterface;
+class UniValue;
+class proxyType;
+enum class FeeReason;
+struct CNodeStateStats;
+struct CRecipient;
+
+namespace ipc {
+
+class Handler;
+class Wallet;
+class PendingWalletTx;
+struct WalletAddress;
+struct WalletBalances;
+struct WalletTx;
+struct WalletTxOut;
+struct WalletTxStatus;
+using WalletOrderForm = std::vector<std::pair<std::string, std::string>>;
+using WalletValueMap = std::map<std::string, std::string>;
+
+//! Top-level interface for a bitcoin node (bitcoind process).
+class Node
+{
+public:
+    virtual ~Node() {}
+
+    //! Set command line arguments.
+    virtual void parseParameters(int argc, const char* const argv[]) = 0;
+
+    //! Set a command line argument if it doesn't already have a value
+    virtual bool softSetArg(const std::string& arg, const std::string& value) = 0;
+
+    //! Set a command line boolean argument if it doesn't already have a value
+    virtual bool softSetBoolArg(const std::string& arg, bool value) = 0;
+
+    //! Load settings from configuration file.
+    virtual void readConfigFile(const std::string& conf_path) = 0;
+
+    //! Choose network parameters.
+    virtual void selectParams(const std::string& network) = 0;
+
+    //! Get network name.
+    virtual std::string getNetwork() = 0;
+
+    //! Init logging.
+    virtual void initLogging() = 0;
+
+    //! Init parameter interaction.
+    virtual void initParameterInteraction() = 0;
+
+    //! Get warnings.
+    virtual std::string getWarnings(const std::string& type) = 0;
+
+    // Get log flags.
+    virtual uint32_t getLogCategories() = 0;
+
+    //! Initialize app dependencies.
+    virtual bool baseInitialize() = 0;
+
+    //! Start node.
+    virtual bool appInitMain() = 0;
+
+    //! Stop node.
+    virtual void appShutdown() = 0;
+
+    //! Start shutdown.
+    virtual void startShutdown() = 0;
+
+    //! Return whether shutdown was requested.
+    virtual bool shutdownRequested() = 0;
+
+    //! Interrupt initialization.
+    virtual bool interruptInit() = 0;
+
+    //! Get help message string.
+    virtual std::string helpMessage(HelpMessageMode mode) = 0;
+
+    //! Map port.
+    virtual void mapPort(bool use_upnp) = 0;
+
+    //! Get proxy.
+    virtual bool getProxy(Network net, proxyType& proxy_info) = 0;
+
+    //! Get number of connections.
+    virtual size_t getNodeCount(CConnman::NumConnections flags) = 0;
+
+    //! Get stats for connected nodes.
+    using NodesStats = std::vector<std::tuple<CNodeStats, bool, CNodeStateStats>>;
+    virtual bool getNodesStats(NodesStats& stats) = 0;
+
+    //! Get ban map entries.
+    virtual bool getBanned(banmap_t& banmap) = 0;
+
+    //! Ban node.
+    virtual bool ban(const CNetAddr& net_addr, BanReason reason, int64_t ban_time_offset) = 0;
+
+    //! Unban node.
+    virtual bool unban(const CSubNet& ip) = 0;
+
+    //! Disconnect node.
+    virtual bool disconnect(NodeId id) = 0;
+
+    //! Get total bytes recv.
+    virtual int64_t getTotalBytesRecv() = 0;
+
+    //! Get total bytes sent.
+    virtual int64_t getTotalBytesSent() = 0;
+
+    //! Get mempool size.
+    virtual size_t getMempoolSize() = 0;
+
+    //! Get mempool dynamic usage.
+    virtual size_t getMempoolDynamicUsage() = 0;
+
+    //! Get header tip height and time.
+    virtual bool getHeaderTip(int& height, int64_t& block_time) = 0;
+
+    //! Get num blocks.
+    virtual int getNumBlocks() = 0;
+
+    //! Get last block time.
+    virtual int64_t getLastBlockTime() = 0;
+
+    //! Get verification progress.
+    virtual double getVerificationProgress() = 0;
+
+    //! Is initial block download.
+    virtual bool isInitialBlockDownload() = 0;
+
+    //! Get reindex.
+    virtual bool getReindex() = 0;
+
+    //! Get importing.
+    virtual bool getImporting() = 0;
+
+    //! Set network active.
+    virtual void setNetworkActive(bool active) = 0;
+
+    //! Get network active.
+    virtual bool getNetworkActive() = 0;
+
+    //! Get tx confirm target.
+    virtual unsigned int getTxConfirmTarget() = 0;
+
+    //! Get wallet rbf.
+    virtual bool getWalletRbf() = 0;
+
+    //! Get required fee.
+    virtual CAmount getRequiredFee(unsigned int tx_bytes) = 0;
+
+    //! Get minimum fee.
+    virtual CAmount getMinimumFee(unsigned int tx_bytes, const CCoinControl& coin_control, int* returned_target, FeeReason* reason) = 0;
+
+    //! Get max tx fee.
+    virtual CAmount getMaxTxFee() = 0;
+
+    //! Estimate smart fee.
+    virtual CFeeRate estimateSmartFee(int num_blocks, bool conservative, int* answer_found_at_blocks = nullptr) = 0;
+
+    //! Get dust relay fee.
+    virtual CFeeRate getDustRelayFee() = 0;
+
+    //! Get fallback fee.
+    virtual CFeeRate getFallbackFee() = 0;
+
+    //! Get pay tx fee.
+    virtual CFeeRate getPayTxFee() = 0;
+
+    //! Set pay tx fee.
+    virtual void setPayTxFee(CFeeRate rate) = 0;
+
+    //! Execute rpc command.
+    virtual UniValue executeRpc(const std::string& command, const UniValue& params, const std::string& uri) = 0;
+
+    //! List rpc commands.
+    virtual std::vector<std::string> listRpcCommands() = 0;
+
+    //! Set RPC timer interface if unset.
+    virtual void rpcSetTimerInterfaceIfUnset(RPCTimerInterface* iface) = 0;
+
+    //! Unset RPC timer interface.
+    virtual void rpcUnsetTimerInterface(RPCTimerInterface* iface) = 0;
+
+    //! Get unspent outputs associated with a transaction.
+    virtual bool getUnspentOutput(const COutPoint& output, Coin& coin) = 0;
+
+    //! Return interface for accessing the wallet.
+    virtual std::unique_ptr<Wallet> getWallet(size_t index) = 0;
+
+    //! Register handler for init messages.
+    using InitMessageFn = std::function<void(const std::string& message)>;
+    virtual std::unique_ptr<Handler> handleInitMessage(InitMessageFn fn) = 0;
+
+    //! Register handler for message box messages.
+    using MessageBoxFn =
+        std::function<bool(const std::string& message, const std::string& caption, unsigned int style)>;
+    virtual std::unique_ptr<Handler> handleMessageBox(MessageBoxFn fn) = 0;
+
+    //! Register handler for question messages.
+    using QuestionFn = std::function<bool(const std::string& message,
+        const std::string& non_interactive_message,
+        const std::string& caption,
+        unsigned int style)>;
+    virtual std::unique_ptr<Handler> handleQuestion(QuestionFn fn) = 0;
+
+    //! Register handler for progress messages.
+    using ShowProgressFn = std::function<void(const std::string& title, int progress)>;
+    virtual std::unique_ptr<Handler> handleShowProgress(ShowProgressFn fn) = 0;
+
+    //! Register handler for load wallet messages.
+    using LoadWalletFn = std::function<void(std::unique_ptr<Wallet> wallet)>;
+    virtual std::unique_ptr<Handler> handleLoadWallet(LoadWalletFn fn) = 0;
+
+    //! Register handler for number of connections changed messages.
+    using NotifyNumConnectionsChangedFn = std::function<void(int new_num_connections)>;
+    virtual std::unique_ptr<Handler> handleNotifyNumConnectionsChanged(NotifyNumConnectionsChangedFn fn) = 0;
+
+    //! Register handler for network active messages.
+    using NotifyNetworkActiveChangedFn = std::function<void(bool network_active)>;
+    virtual std::unique_ptr<Handler> handleNotifyNetworkActiveChanged(NotifyNetworkActiveChangedFn fn) = 0;
+
+    //! Register handler for notify alert messages.
+    using NotifyAlertChangedFn = std::function<void()>;
+    virtual std::unique_ptr<Handler> handleNotifyAlertChanged(NotifyAlertChangedFn fn) = 0;
+
+    //! Register handler for ban list messages.
+    using BannedListChangedFn = std::function<void()>;
+    virtual std::unique_ptr<Handler> handleBannedListChanged(BannedListChangedFn fn) = 0;
+
+    //! Register handler for block tip messages.
+    using NotifyBlockTipFn =
+        std::function<void(bool initial_download, int height, int64_t block_time, double verification_progress)>;
+    virtual std::unique_ptr<Handler> handleNotifyBlockTip(NotifyBlockTipFn fn) = 0;
+
+    //! Register handler for header tip messages.
+    using NotifyHeaderTipFn =
+        std::function<void(bool initial_download, int height, int64_t block_time, double verification_progress)>;
+    virtual std::unique_ptr<Handler> handleNotifyHeaderTip(NotifyHeaderTipFn fn) = 0;
+};
+
+//! Interface for accessing a wallet.
+class Wallet
+{
+public:
+    virtual ~Wallet() {}
+
+    //! Encrypt wallet.
+    virtual bool encryptWallet(const SecureString& wallet_passphrase) = 0;
+
+    //! Return whether wallet is encrypted.
+    virtual bool isCrypted() = 0;
+
+    //! Lock wallet.
+    virtual bool lock() = 0;
+
+    //! Unlock wallet.
+    virtual bool unlock(const SecureString& wallet_passphrase) = 0;
+
+    //! Return whether wallet is locked.
+    virtual bool isLocked() = 0;
+
+    //! Change wallet passphrase.
+    virtual bool changeWalletPassphrase(const SecureString& old_wallet_passphrase,
+        const SecureString& new_wallet_passphrase) = 0;
+
+    //! Back up wallet.
+    virtual bool backupWallet(const std::string& filename) = 0;
+
+    // Get key from pool.
+    virtual bool getKeyFromPool(CPubKey& pub_key, bool internal = false) = 0;
+
+    //! Get public key.
+    virtual bool getPubKey(const CKeyID& address, CPubKey& pub_key) = 0;
+
+    //! Get private key.
+    virtual bool getPrivKey(const CKeyID& address, CKey& key) = 0;
+
+    //! Return whether wallet has private key.
+    virtual bool havePrivKey(const CKeyID& address) = 0;
+
+    //! Return whether wallet has watch only keys.
+    virtual bool haveWatchOnly() = 0;
+
+    //! Add or update address.
+    virtual bool setAddressBook(const CTxDestination& dest, const std::string& name, const std::string& purpose) = 0;
+
+    // Remove address.
+    virtual bool delAddressBook(const CTxDestination& dest) = 0;
+
+    //! Look up address in wallet, return whether exists.
+    virtual bool getAddress(const CTxDestination& dest,
+        std::string* name = nullptr,
+        isminetype* is_mine = nullptr) = 0;
+
+    //! Get wallet address list.
+    virtual std::vector<WalletAddress> getAddresses() = 0;
+
+    // Get account addresses.
+    virtual std::set<CTxDestination> getAccountAddresses(const std::string& account) = 0;
+
+    //! Add dest data.
+    virtual bool addDestData(const CTxDestination& dest, const std::string& key, const std::string& value) = 0;
+
+    //! Erase dest data.
+    virtual bool eraseDestData(const CTxDestination& dest, const std::string& key) = 0;
+
+    //! Get dest values with prefix.
+    virtual std::vector<std::string> getDestValues(const std::string& prefix) = 0;
+
+    //! Lock coin.
+    virtual void lockCoin(const COutPoint& output) = 0;
+
+    //! Unlock coin.
+    virtual void unlockCoin(const COutPoint& output) = 0;
+
+    //! Return whether coin is locked.
+    virtual bool isLockedCoin(const COutPoint& output) = 0;
+
+    //! List locked coins.
+    virtual void listLockedCoins(std::vector<COutPoint>& outputs) = 0;
+
+    //! Create transaction.
+    virtual std::unique_ptr<PendingWalletTx> createTransaction(const std::vector<CRecipient>& recipients,
+        const CCoinControl& coin_control,
+        bool sign,
+        int& change_pos,
+        CAmount& fee,
+        std::string& fail_reason) = 0;
+
+    //! Return whether transaction can be abandoned.
+    virtual bool transactionCanBeAbandoned(const uint256& txid) = 0;
+
+    //! Abandon transaction.
+    virtual bool abandonTransaction(const uint256& txid) = 0;
+
+    //! Return whether transaction can be bumped.
+    virtual bool transactionCanBeBumped(const uint256& txid) = 0;
+
+    //! Create bump transaction.
+    virtual bool createBumpTransaction(const uint256& txid,
+        const CCoinControl& coin_control,
+        CAmount total_fee,
+        std::vector<std::string>& errors,
+        CAmount& old_fee,
+        CAmount& new_fee,
+        CMutableTransaction& mtx) = 0;
+
+    //! Sign bump transaction.
+    virtual bool signBumpTransaction(CMutableTransaction& mtx) = 0;
+
+    //! Commit bump transaction.
+    virtual bool commitBumpTransaction(const uint256& txid,
+        CMutableTransaction&& mtx,
+        std::vector<std::string>& errors,
+        uint256& bumped_txid) = 0;
+
+    //! Get a transaction.
+    virtual CTransactionRef getTx(const uint256& txid) = 0;
+
+    //! Get transaction information.
+    virtual WalletTx getWalletTx(const uint256& txid) = 0;
+
+    //! Get list of all wallet transactions.
+    virtual std::vector<WalletTx> getWalletTxs() = 0;
+
+    //! Try to get updated status for a particular transaction, if possible without blocking.
+    virtual bool tryGetTxStatus(const uint256& txid,
+        WalletTxStatus& tx_status,
+        int& num_blocks,
+        int64_t& adjusted_time) = 0;
+
+    //! Get transaction details.
+    virtual WalletTx getWalletTxDetails(const uint256& txid,
+        WalletTxStatus& tx_status,
+        WalletOrderForm& order_form,
+        bool& in_mempool,
+        int& num_blocks,
+        int64_t& adjusted_time) = 0;
+
+    //! Get balances.
+    virtual WalletBalances getBalances() = 0;
+
+    //! Get balances if possible without blocking.
+    virtual bool tryGetBalances(WalletBalances& balances, int& num_blocks) = 0;
+
+    //! Get balance.
+    virtual CAmount getBalance() = 0;
+
+    //! Get available balance.
+    virtual CAmount getAvailableBalance(const CCoinControl& coin_control) = 0;
+
+    //! Return whether transaction input belongs to wallet.
+    virtual isminetype isMine(const CTxIn& txin) = 0;
+
+    //! Return whether transaction output belongs to wallet.
+    virtual isminetype isMine(const CTxOut& txout) = 0;
+
+    //! Return debit amount if transaction input belongs to wallet.
+    virtual CAmount getDebit(const CTxIn& txin, isminefilter filter) = 0;
+
+    //! Return credit amount if transaction input belongs to wallet.
+    virtual CAmount getCredit(const CTxOut& txout, isminefilter filter) = 0;
+
+    //! Return AvailableCoins + LockedCoins grouped by wallet address.
+    //! (put change in one group with wallet address)
+    using CoinsList = std::map<CTxDestination, std::vector<std::tuple<COutPoint, WalletTxOut>>>;
+    virtual CoinsList listCoins() = 0;
+
+    //! Return wallet transaction output information.
+    virtual std::vector<WalletTxOut> getCoins(const std::vector<COutPoint>& outputs) = 0;
+
+    // Return whether HD enabled.
+    virtual bool hdEnabled() = 0;
+
+    //! Register handler for show progress messages.
+    using ShowProgressFn = std::function<void(const std::string& title, int progress)>;
+    virtual std::unique_ptr<Handler> handleShowProgress(ShowProgressFn fn) = 0;
+
+    //! Register handler for status changed messages.
+    using StatusChangedFn = std::function<void()>;
+    virtual std::unique_ptr<Handler> handleStatusChanged(StatusChangedFn fn) = 0;
+
+    //! Register handler for address book changed messages.
+    using AddressBookChangedFn = std::function<void(const CTxDestination& address,
+        const std::string& label,
+        bool is_mine,
+        const std::string& purpose,
+        ChangeType status)>;
+    virtual std::unique_ptr<Handler> handleAddressBookChanged(AddressBookChangedFn fn) = 0;
+
+    //! Register handler for transaction changed messages.
+    using TransactionChangedFn = std::function<void(const uint256& txid, ChangeType status)>;
+    virtual std::unique_ptr<Handler> handleTransactionChanged(TransactionChangedFn fn) = 0;
+
+    //! Register handler for watchonly changed messages.
+    using WatchOnlyChangedFn = std::function<void(bool have_watch_only)>;
+    virtual std::unique_ptr<Handler> handleWatchOnlyChanged(WatchOnlyChangedFn fn) = 0;
+};
+
+//! Interface for managing a registered handler.
+class Handler
+{
+public:
+    virtual ~Handler() {}
+
+    //! Disconnect the handler.
+    virtual void disconnect() = 0;
+};
+
+//! Tracking object returned by CreateTransaction and passed to CommitTransaction.
+class PendingWalletTx
+{
+public:
+    virtual ~PendingWalletTx() {}
+
+    //! Get transaction data.
+    virtual const CTransaction& get() = 0;
+
+    //! Get virtual transaction size.
+    virtual int64_t getVirtualSize() = 0;
+
+    //! Send pending transaction and commit to wallet.
+    virtual bool commit(WalletValueMap value_map,
+        WalletOrderForm order_form,
+        std::string from_account,
+        std::string& reject_reason) = 0;
+};
+
+//! Information about one wallet address.
+struct WalletAddress
+{
+    CTxDestination dest;
+    isminetype is_mine;
+    std::string name;
+    std::string purpose;
+};
+
+//! Collection of wallet balances.
+struct WalletBalances
+{
+    CAmount balance = 0;
+    CAmount unconfirmed_balance = 0;
+    CAmount immature_balance = 0;
+    bool have_watch_only = false;
+    CAmount watch_only_balance = 0;
+    CAmount unconfirmed_watch_only_balance = 0;
+    CAmount immature_watch_only_balance = 0;
+
+    bool balanceChanged(const WalletBalances& prev) const
+    {
+        return balance != prev.balance || unconfirmed_balance != prev.unconfirmed_balance ||
+               immature_balance != prev.immature_balance || watch_only_balance != prev.watch_only_balance ||
+               unconfirmed_watch_only_balance != prev.unconfirmed_watch_only_balance ||
+               immature_watch_only_balance != prev.immature_watch_only_balance;
+    }
+};
+
+// Wallet transaction information.
+struct WalletTx
+{
+    CTransactionRef tx;
+    std::vector<isminetype> txin_is_mine;
+    std::vector<isminetype> txout_is_mine;
+    std::vector<CTxDestination> txout_address;
+    std::vector<isminetype> txout_address_is_mine;
+    CAmount credit;
+    CAmount debit;
+    CAmount change;
+    int64_t time;
+    std::map<std::string, std::string> value_map;
+    bool is_coinbase;
+};
+
+//! Updated transaction status.
+struct WalletTxStatus
+{
+    int block_height;
+    int blocks_to_maturity;
+    int depth_in_main_chain;
+    int request_count;
+    unsigned int time_received;
+    uint32_t lock_time;
+    bool is_final;
+    bool is_trusted;
+    bool is_abandoned;
+    bool is_coinbase;
+    bool is_in_main_chain;
+};
+
+//! Wallet transaction output.
+struct WalletTxOut
+{
+    CTxOut txout;
+    int64_t time;
+    int depth_in_main_chain = -1;
+    bool is_spent = false;
+};
+
+//! Protocol IPC interface should use to communicate with implementation.
+enum Protocol {
+    LOCAL, //!< Call functions linked into current executable.
+};
+
+//! Create IPC node interface, communicating with requested protocol. Returns
+//! null if protocol isn't implemented or is not available in the current build
+//! configuation.
+std::unique_ptr<Node> MakeNode(Protocol protocol);
+
+} // namespace ipc
+
+#endif // BITCOIN_IPC_INTERFACES_H
diff --git a/src/ipc/local/interfaces.cpp b/src/ipc/local/interfaces.cpp
new file mode 100644
index 00000000000..d59d04c73a6
--- /dev/null
+++ b/src/ipc/local/interfaces.cpp
@@ -0,0 +1,730 @@
+#include <ipc/interfaces.h>
+
+#include <chainparams.h>
+#include <consensus/validation.h>
+#include <init.h>
+#include <ipc/util.h>
+#include <net.h>
+#include <net_processing.h>
+#include <netbase.h>
+#include <policy/fees.h>
+#include <policy/policy.h>
+#include <policy/rbf.h>
+#include <rpc/server.h>
+#include <scheduler.h>
+#include <txmempool.h>
+#include <ui_interface.h>
+#include <util.h>
+#include <validation.h>
+#include <warnings.h>
+
+#if defined(HAVE_CONFIG_H)
+#include "config/bitcoin-config.h"
+#endif
+#ifdef ENABLE_WALLET
+#include "wallet/feebumper.h"
+#include "wallet/wallet.h"
+#endif
+
+#include <boost/thread.hpp>
+#include <univalue.h>
+
+namespace ipc {
+namespace local {
+namespace {
+
+#ifdef ENABLE_WALLET
+#define CHECK_WALLET(x) x
+#else
+#define CHECK_WALLET(x) throw std::logic_error("Wallet function called in non-wallet build.")
+#endif
+
+class HandlerImpl : public Handler
+{
+public:
+    HandlerImpl(boost::signals2::connection connection) : m_connection(std::move(connection)) {}
+
+    void disconnect() override { m_connection.disconnect(); }
+
+    boost::signals2::scoped_connection m_connection;
+};
+
+#ifdef ENABLE_WALLET
+class PendingWalletTxImpl : public PendingWalletTx
+{
+public:
+    PendingWalletTxImpl(CWallet& wallet) : m_wallet(wallet), m_key(&wallet) {}
+
+    const CTransaction& get() override { return *m_wtx.tx; }
+
+    int64_t getVirtualSize() override { return ::GetVirtualTransactionSize(*m_wtx.tx); }
+
+    bool commit(WalletValueMap value_map,
+        WalletOrderForm order_form,
+        std::string from_account,
+        std::string& reject_reason) override
+    {
+        LOCK2(::cs_main, m_wallet.cs_wallet);
+        m_wtx.mapValue = std::move(value_map);
+        m_wtx.vOrderForm = std::move(order_form);
+        m_wtx.strFromAccount = std::move(from_account);
+        CValidationState state;
+        if (!m_wallet.CommitTransaction(m_wtx, m_key, ::g_connman.get(), state)) {
+            reject_reason = state.GetRejectReason();
+            return false;
+        }
+        return true;
+    }
+
+    CWalletTx m_wtx;
+    CWallet& m_wallet;
+    CReserveKey m_key;
+};
+
+//! Construct wallet tx struct.
+WalletTx MakeWalletTx(CWallet& wallet, const CWalletTx& wtx)
+{
+    WalletTx result;
+    result.tx = wtx.tx;
+    result.txin_is_mine.reserve(wtx.tx->vin.size());
+    for (const auto& txin : wtx.tx->vin) {
+        result.txin_is_mine.emplace_back(wallet.IsMine(txin));
+    }
+    result.txout_is_mine.reserve(wtx.tx->vout.size());
+    result.txout_address.reserve(wtx.tx->vout.size());
+    result.txout_address_is_mine.reserve(wtx.tx->vout.size());
+    for (const auto& txout : wtx.tx->vout) {
+        result.txout_is_mine.emplace_back(wallet.IsMine(txout));
+        result.txout_address.emplace_back();
+        result.txout_address_is_mine.emplace_back(
+            ::ExtractDestination(txout.scriptPubKey, result.txout_address.back()) ?
+                ::IsMine(wallet, result.txout_address.back()) :
+                ISMINE_NO);
+    }
+    result.credit = wtx.GetCredit(ISMINE_ALL);
+    result.debit = wtx.GetDebit(ISMINE_ALL);
+    result.change = wtx.GetChange();
+    result.time = wtx.GetTxTime();
+    result.value_map = wtx.mapValue;
+    result.is_coinbase = wtx.IsCoinBase();
+    return result;
+}
+
+//! Construct wallet tx status struct.
+WalletTxStatus MakeWalletTxStatus(const CWalletTx& wtx)
+{
+    WalletTxStatus result;
+    auto mi = ::mapBlockIndex.find(wtx.hashBlock);
+    CBlockIndex* block = mi != ::mapBlockIndex.end() ? mi->second : nullptr;
+    result.block_height = (block ? block->nHeight : std::numeric_limits<int>::max()),
+    result.blocks_to_maturity = wtx.GetBlocksToMaturity();
+    result.depth_in_main_chain = wtx.GetDepthInMainChain();
+    result.request_count = wtx.GetRequestCount();
+    result.time_received = wtx.nTimeReceived;
+    result.lock_time = wtx.tx->nLockTime;
+    result.is_final = ::CheckFinalTx(*wtx.tx);
+    result.is_trusted = wtx.IsTrusted();
+    result.is_abandoned = wtx.isAbandoned();
+    result.is_coinbase = wtx.IsCoinBase();
+    result.is_in_main_chain = wtx.IsInMainChain();
+    return result;
+}
+
+//! Construct wallet TxOut struct.
+WalletTxOut MakeWalletTxOut(CWallet& wallet, const CWalletTx& wtx, int n, int depth)
+{
+    WalletTxOut result;
+    result.txout = wtx.tx->vout[n];
+    result.time = wtx.GetTxTime();
+    result.depth_in_main_chain = depth;
+    result.is_spent = wallet.IsSpent(wtx.GetHash(), n);
+    return result;
+}
+
+class WalletImpl : public Wallet
+{
+public:
+    WalletImpl(CWallet& wallet) : m_wallet(wallet) {}
+
+    bool encryptWallet(const SecureString& wallet_passphrase) override
+    {
+        return m_wallet.EncryptWallet(wallet_passphrase);
+    }
+    bool isCrypted() override { return m_wallet.IsCrypted(); }
+    bool lock() override { return m_wallet.Lock(); }
+    bool unlock(const SecureString& wallet_passphrase) override { return m_wallet.Unlock(wallet_passphrase); }
+    bool isLocked() override { return m_wallet.IsLocked(); }
+    bool changeWalletPassphrase(const SecureString& old_wallet_passphrase,
+        const SecureString& new_wallet_passphrase) override
+    {
+        return m_wallet.ChangeWalletPassphrase(old_wallet_passphrase, new_wallet_passphrase);
+    }
+    bool backupWallet(const std::string& filename) override { return m_wallet.BackupWallet(filename); }
+    bool getKeyFromPool(CPubKey& pub_key, bool internal) override
+    {
+        return m_wallet.GetKeyFromPool(pub_key, internal);
+    }
+    bool getPubKey(const CKeyID& address, CPubKey& pub_key) override { return m_wallet.GetPubKey(address, pub_key); }
+    bool getPrivKey(const CKeyID& address, CKey& key) override { return m_wallet.GetKey(address, key); }
+    bool havePrivKey(const CKeyID& address) override { return m_wallet.HaveKey(address); }
+    bool haveWatchOnly() override { return m_wallet.HaveWatchOnly(); };
+    bool setAddressBook(const CTxDestination& dest, const std::string& name, const std::string& purpose) override
+    {
+        LOCK(m_wallet.cs_wallet);
+        return m_wallet.SetAddressBook(dest, name, purpose);
+    }
+    bool delAddressBook(const CTxDestination& dest) override
+    {
+        LOCK(m_wallet.cs_wallet);
+        return m_wallet.DelAddressBook(dest);
+    }
+    bool getAddress(const CTxDestination& dest, std::string* name, isminetype* is_mine) override
+    {
+        LOCK(m_wallet.cs_wallet);
+        auto it = m_wallet.mapAddressBook.find(dest);
+        if (it == m_wallet.mapAddressBook.end()) {
+            return false;
+        }
+        if (name) {
+            *name = it->second.name;
+        }
+        if (is_mine) {
+            *is_mine = ::IsMine(m_wallet, dest);
+        }
+        return true;
+    }
+    std::vector<WalletAddress> getAddresses() override
+    {
+        LOCK(m_wallet.cs_wallet);
+        std::vector<WalletAddress> result;
+        for (const auto& item : m_wallet.mapAddressBook) {
+            result.emplace_back();
+            result.back().dest = item.first;
+            result.back().is_mine = ::IsMine(m_wallet, item.first);
+            result.back().name = item.second.name;
+            result.back().purpose = item.second.purpose;
+        }
+        return result;
+    }
+    std::set<CTxDestination> getAccountAddresses(const std::string& account) override
+    {
+        return m_wallet.GetAccountAddresses(account);
+    }
+    bool addDestData(const CTxDestination& dest, const std::string& key, const std::string& value) override
+    {
+        LOCK(m_wallet.cs_wallet);
+        return m_wallet.AddDestData(dest, key, value);
+    }
+    bool eraseDestData(const CTxDestination& dest, const std::string& key) override
+    {
+        LOCK(m_wallet.cs_wallet);
+        return m_wallet.EraseDestData(dest, key);
+    }
+    std::vector<std::string> getDestValues(const std::string& prefix) override
+    {
+        return m_wallet.GetDestValues(prefix);
+    }
+    void lockCoin(const COutPoint& output) override
+    {
+        LOCK2(::cs_main, m_wallet.cs_wallet);
+        return m_wallet.LockCoin(output);
+    }
+    void unlockCoin(const COutPoint& output) override
+    {
+        LOCK2(::cs_main, m_wallet.cs_wallet);
+        return m_wallet.UnlockCoin(output);
+    }
+    bool isLockedCoin(const COutPoint& output) override
+    {
+        LOCK2(::cs_main, m_wallet.cs_wallet);
+        return m_wallet.IsLockedCoin(output.hash, output.n);
+    }
+    void listLockedCoins(std::vector<COutPoint>& outputs) override
+    {
+        LOCK2(::cs_main, m_wallet.cs_wallet);
+        return m_wallet.ListLockedCoins(outputs);
+    }
+    std::unique_ptr<PendingWalletTx> createTransaction(const std::vector<CRecipient>& recipients,
+        const CCoinControl& coin_control,
+        bool sign,
+        int& change_pos,
+        CAmount& fee,
+        std::string& fail_reason) override
+    {
+        LOCK2(::cs_main, m_wallet.cs_wallet);
+        auto pending = MakeUnique<PendingWalletTxImpl>(m_wallet);
+        if (!m_wallet.CreateTransaction(
+                recipients, pending->m_wtx, pending->m_key, fee, change_pos, fail_reason, coin_control, sign)) {
+            return {};
+        }
+        return std::move(pending);
+    }
+    bool transactionCanBeAbandoned(const uint256& txid) override { return m_wallet.TransactionCanBeAbandoned(txid); }
+    bool abandonTransaction(const uint256& txid) override { return m_wallet.AbandonTransaction(txid); }
+    bool transactionCanBeBumped(const uint256& txid) { return FeeBumper::TransactionCanBeBumped(&m_wallet, txid); }
+    bool createBumpTransaction(const uint256& txid,
+        const CCoinControl& coin_control,
+        CAmount total_fee,
+        std::vector<std::string>& errors,
+        CAmount& old_fee,
+        CAmount& new_fee,
+        CMutableTransaction& mtx)
+    {
+        return FeeBumper::CreateTransaction(&m_wallet, txid, coin_control, total_fee, errors, old_fee, new_fee, mtx) ==
+               BumpFeeResult::OK;
+    }
+    bool signBumpTransaction(CMutableTransaction& mtx) { return FeeBumper::SignTransaction(&m_wallet, mtx); }
+    bool commitBumpTransaction(const uint256& txid,
+        CMutableTransaction&& mtx,
+        std::vector<std::string>& errors,
+        uint256& bumped_txid)
+    {
+        return FeeBumper::CommitTransaction(&m_wallet, txid, std::move(mtx), errors, bumped_txid) == BumpFeeResult::OK;
+    }
+    CTransactionRef getTx(const uint256& txid) override
+    {
+        LOCK2(::cs_main, m_wallet.cs_wallet);
+        auto mi = m_wallet.mapWallet.find(txid);
+        if (mi != m_wallet.mapWallet.end()) {
+            return mi->second.tx;
+        }
+        return {};
+    }
+    WalletTx getWalletTx(const uint256& txid) override
+    {
+        LOCK2(::cs_main, m_wallet.cs_wallet);
+        auto mi = m_wallet.mapWallet.find(txid);
+        if (mi != m_wallet.mapWallet.end()) {
+            return MakeWalletTx(m_wallet, mi->second);
+        }
+        return {};
+    }
+    std::vector<WalletTx> getWalletTxs() override
+    {
+        LOCK2(::cs_main, m_wallet.cs_wallet);
+        std::vector<WalletTx> result;
+        result.reserve(m_wallet.mapWallet.size());
+        for (const auto& entry : m_wallet.mapWallet) {
+            result.emplace_back(MakeWalletTx(m_wallet, entry.second));
+        }
+        return result;
+    }
+    bool tryGetTxStatus(const uint256& txid,
+        ipc::WalletTxStatus& tx_status,
+        int& num_blocks,
+        int64_t& adjusted_time) override
+    {
+        TRY_LOCK(::cs_main, lockMain);
+        if (!lockMain) {
+            return false;
+        }
+        TRY_LOCK(m_wallet.cs_wallet, lockWallet);
+        if (!lockWallet) {
+            return false;
+        }
+        auto mi = m_wallet.mapWallet.find(txid);
+        if (mi == m_wallet.mapWallet.end()) {
+            return false;
+        }
+        num_blocks = ::chainActive.Height();
+        adjusted_time = ::GetAdjustedTime();
+        tx_status = MakeWalletTxStatus(mi->second);
+        return true;
+    }
+    WalletTx getWalletTxDetails(const uint256& txid,
+        WalletTxStatus& tx_status,
+        WalletOrderForm& order_form,
+        bool& in_mempool,
+        int& num_blocks,
+        int64_t& adjusted_time) override
+    {
+        LOCK2(::cs_main, m_wallet.cs_wallet);
+        auto mi = m_wallet.mapWallet.find(txid);
+        if (mi != m_wallet.mapWallet.end()) {
+            num_blocks = ::chainActive.Height();
+            adjusted_time = ::GetAdjustedTime();
+            in_mempool = mi->second.InMempool();
+            order_form = mi->second.vOrderForm;
+            tx_status = MakeWalletTxStatus(mi->second);
+            return MakeWalletTx(m_wallet, mi->second);
+        }
+        return {};
+    }
+    WalletBalances getBalances() override
+    {
+        WalletBalances result;
+        result.balance = m_wallet.GetBalance();
+        result.unconfirmed_balance = m_wallet.GetUnconfirmedBalance();
+        result.immature_balance = m_wallet.GetImmatureBalance();
+        result.have_watch_only = m_wallet.HaveWatchOnly();
+        if (result.have_watch_only) {
+            result.watch_only_balance = m_wallet.GetWatchOnlyBalance();
+            result.unconfirmed_watch_only_balance = m_wallet.GetUnconfirmedWatchOnlyBalance();
+            result.immature_watch_only_balance = m_wallet.GetImmatureWatchOnlyBalance();
+        }
+        return result;
+    }
+    bool tryGetBalances(WalletBalances& balances, int& num_blocks) override
+    {
+        TRY_LOCK(::cs_main, lockMain);
+        if (!lockMain) return false;
+        TRY_LOCK(m_wallet.cs_wallet, lockWallet);
+        if (!lockWallet) {
+            return false;
+        }
+        balances = getBalances();
+        num_blocks = ::chainActive.Height();
+        return true;
+    }
+    CAmount getBalance() override { return m_wallet.GetBalance(); }
+    CAmount getAvailableBalance(const CCoinControl& coin_control) override
+    {
+        return m_wallet.GetAvailableBalance(&coin_control);
+    }
+    isminetype isMine(const CTxIn& txin) override
+    {
+        LOCK2(::cs_main, m_wallet.cs_wallet);
+        return m_wallet.IsMine(txin);
+    }
+    isminetype isMine(const CTxOut& txout) override
+    {
+        LOCK2(::cs_main, m_wallet.cs_wallet);
+        return m_wallet.IsMine(txout);
+    }
+    CAmount getDebit(const CTxIn& txin, isminefilter filter) override
+    {
+        LOCK2(::cs_main, m_wallet.cs_wallet);
+        return m_wallet.GetDebit(txin, filter);
+    }
+    CAmount getCredit(const CTxOut& txout, isminefilter filter) override
+    {
+        LOCK2(::cs_main, m_wallet.cs_wallet);
+        return m_wallet.GetCredit(txout, filter);
+    }
+    CoinsList listCoins() override
+    {
+        LOCK2(::cs_main, m_wallet.cs_wallet);
+        CoinsList result;
+        for (const auto& entry : m_wallet.ListCoins()) {
+            auto& group = result[entry.first];
+            for (const auto& coin : entry.second) {
+                group.emplace_back(
+                    COutPoint(coin.tx->GetHash(), coin.i), MakeWalletTxOut(m_wallet, *coin.tx, coin.i, coin.nDepth));
+            }
+        }
+        return result;
+    }
+    std::vector<WalletTxOut> getCoins(const std::vector<COutPoint>& outputs) override
+    {
+        LOCK2(::cs_main, m_wallet.cs_wallet);
+        std::vector<WalletTxOut> result;
+        result.reserve(outputs.size());
+        for (const auto& output : outputs) {
+            result.emplace_back();
+            auto it = m_wallet.mapWallet.find(output.hash);
+            if (it != m_wallet.mapWallet.end()) {
+                int depth = it->second.GetDepthInMainChain();
+                if (depth >= 0) {
+                    result.back() = MakeWalletTxOut(m_wallet, it->second, output.n, depth);
+                }
+            }
+        }
+        return result;
+    }
+    bool hdEnabled() override { return m_wallet.IsHDEnabled(); }
+    std::unique_ptr<Handler> handleShowProgress(ShowProgressFn fn) override
+    {
+        return MakeUnique<HandlerImpl>(m_wallet.ShowProgress.connect(fn));
+    }
+    std::unique_ptr<Handler> handleStatusChanged(StatusChangedFn fn) override
+    {
+        return MakeUnique<HandlerImpl>(m_wallet.NotifyStatusChanged.connect([fn](CCryptoKeyStore*) { fn(); }));
+    }
+    std::unique_ptr<Handler> handleAddressBookChanged(AddressBookChangedFn fn) override
+    {
+        return MakeUnique<HandlerImpl>(m_wallet.NotifyAddressBookChanged.connect(
+            [fn](CWallet*, const CTxDestination& address, const std::string& label, bool is_mine,
+                const std::string& purpose, ChangeType status) { fn(address, label, is_mine, purpose, status); }));
+    }
+    std::unique_ptr<Handler> handleTransactionChanged(TransactionChangedFn fn) override
+    {
+        return MakeUnique<HandlerImpl>(m_wallet.NotifyTransactionChanged.connect(
+            [fn, this](CWallet*, const uint256& txid, ChangeType status) { fn(txid, status); }));
+    }
+    std::unique_ptr<Handler> handleWatchOnlyChanged(WatchOnlyChangedFn fn) override
+    {
+        return MakeUnique<HandlerImpl>(m_wallet.NotifyWatchonlyChanged.connect(fn));
+    }
+
+    CWallet& m_wallet;
+};
+#endif
+
+class NodeImpl : public Node
+{
+public:
+    void parseParameters(int argc, const char* const argv[]) override { gArgs.ParseParameters(argc, argv); }
+    void readConfigFile(const std::string& conf_path) override { gArgs.ReadConfigFile(conf_path); }
+    bool softSetArg(const std::string& arg, const std::string& value) override { return gArgs.SoftSetArg(arg, value); }
+    bool softSetBoolArg(const std::string& arg, bool value) override { return gArgs.SoftSetBoolArg(arg, value); }
+    void selectParams(const std::string& network) override { ::SelectParams(network); }
+    std::string getNetwork() override { return ::Params().NetworkIDString(); }
+    void initLogging() override { ::InitLogging(); }
+    void initParameterInteraction() override { ::InitParameterInteraction(); }
+    std::string getWarnings(const std::string& type) override { return ::GetWarnings(type); }
+    uint32_t getLogCategories() override { return ::logCategories; }
+    bool baseInitialize() override
+    {
+        return ::AppInitBasicSetup() && ::AppInitParameterInteraction() && ::AppInitSanityChecks() &&
+               ::AppInitLockDataDirectory();
+    }
+    bool appInitMain() override { return ::AppInitMain(m_thread_group, m_scheduler); }
+    void appShutdown() override
+    {
+        ::Interrupt(m_thread_group);
+        m_thread_group.join_all();
+        ::Shutdown();
+    }
+    void startShutdown() override { ::StartShutdown(); }
+    bool shutdownRequested() override { return ::ShutdownRequested(); }
+    bool interruptInit() override
+    {
+        std::function<void(void)> action;
+        {
+            LOCK(m_break_action_lock);
+            action = m_break_action;
+        }
+        if (action) {
+            action();
+            return true;
+        }
+        return false;
+    }
+    std::string helpMessage(HelpMessageMode mode) override { return ::HelpMessage(mode); }
+    void mapPort(bool use_upnp) override { ::MapPort(use_upnp); }
+    bool getProxy(Network net, proxyType& proxy_info) override { return ::GetProxy(net, proxy_info); }
+    size_t getNodeCount(CConnman::NumConnections flags) override
+    {
+        return ::g_connman ? ::g_connman->GetNodeCount(flags) : 0;
+    }
+    bool getNodesStats(NodesStats& stats) override
+    {
+        stats.clear();
+
+        if (::g_connman) {
+            std::vector<CNodeStats> stats_temp;
+            ::g_connman->GetNodeStats(stats_temp);
+
+            stats.reserve(stats_temp.size());
+            for (auto& node_stats_temp : stats_temp) {
+                stats.emplace_back(std::move(node_stats_temp), false, CNodeStateStats());
+            }
+
+            // Try to retrieve the CNodeStateStats for each node.
+            TRY_LOCK(::cs_main, lockMain);
+            if (lockMain) {
+                for (auto& node_stats : stats) {
+                    std::get<1>(node_stats) =
+                        GetNodeStateStats(std::get<0>(node_stats).nodeid, std::get<2>(node_stats));
+                }
+            }
+            return true;
+        }
+        return false;
+    }
+    bool getBanned(banmap_t& banmap)
+    {
+        if (::g_connman) {
+            ::g_connman->GetBanned(banmap);
+            return true;
+        }
+        return false;
+    }
+    bool ban(const CNetAddr& net_addr, BanReason reason, int64_t ban_time_offset) override
+    {
+        if (::g_connman) {
+            ::g_connman->Ban(net_addr, reason, ban_time_offset);
+            return true;
+        }
+        return false;
+    }
+    bool unban(const CSubNet& ip) override
+    {
+        if (::g_connman) {
+            ::g_connman->Unban(ip);
+            return true;
+        }
+        return false;
+    }
+    bool disconnect(NodeId id) override
+    {
+        if (::g_connman) {
+            return ::g_connman->DisconnectNode(id);
+        }
+        return false;
+    }
+    int64_t getTotalBytesRecv() override { return ::g_connman ? ::g_connman->GetTotalBytesRecv() : 0; }
+    int64_t getTotalBytesSent() override { return ::g_connman ? ::g_connman->GetTotalBytesSent() : 0; }
+    size_t getMempoolSize() override { return ::mempool.size(); }
+    size_t getMempoolDynamicUsage() override { return ::mempool.DynamicMemoryUsage(); }
+    bool getHeaderTip(int& height, int64_t& block_time) override
+    {
+        LOCK(::cs_main);
+        if (::pindexBestHeader) {
+            height = ::pindexBestHeader->nHeight;
+            block_time = ::pindexBestHeader->GetBlockTime();
+            return true;
+        }
+        return false;
+    }
+    int getNumBlocks() override
+    {
+        LOCK(::cs_main);
+        return ::chainActive.Height();
+    }
+    int64_t getLastBlockTime() override
+    {
+        LOCK(::cs_main);
+        if (::chainActive.Tip()) {
+            return ::chainActive.Tip()->GetBlockTime();
+        }
+        return ::Params().GenesisBlock().GetBlockTime(); // Genesis block's time of current network
+    }
+    double getVerificationProgress() override
+    {
+        const CBlockIndex* tip;
+        {
+            LOCK(::cs_main);
+            tip = ::chainActive.Tip();
+        }
+        return ::GuessVerificationProgress(::Params().TxData(), tip);
+    }
+    bool isInitialBlockDownload() override { return ::IsInitialBlockDownload(); }
+    bool getReindex() override { return ::fReindex; }
+    bool getImporting() override { return ::fImporting; }
+    void setNetworkActive(bool active) override
+    {
+        if (::g_connman) {
+            ::g_connman->SetNetworkActive(active);
+        }
+    }
+    bool getNetworkActive() override { return ::g_connman && ::g_connman->GetNetworkActive(); }
+    unsigned int getTxConfirmTarget() override { CHECK_WALLET(return ::nTxConfirmTarget); }
+    bool getWalletRbf() override { CHECK_WALLET(return ::fWalletRbf); }
+    CAmount getRequiredFee(unsigned int tx_bytes) override { CHECK_WALLET(return CWallet::GetRequiredFee(tx_bytes)); }
+    CAmount getMinimumFee(unsigned int tx_bytes,
+        const CCoinControl& coin_control,
+        int* returned_target,
+        FeeReason* reason) override
+    {
+        FeeCalculation fee_calc;
+        CHECK_WALLET(return CWallet::GetMinimumFee(tx_bytes, coin_control, ::mempool, ::feeEstimator, &fee_calc));
+        if (returned_target) *returned_target = fee_calc.returnedTarget;
+        if (reason) *reason = fee_calc.reason;
+    }
+    CAmount getMaxTxFee() override { return ::maxTxFee; }
+    CFeeRate estimateSmartFee(int num_blocks, bool conservative, int* returned_target = nullptr) override
+    {
+        FeeCalculation fee_calc;
+        CFeeRate result = ::feeEstimator.estimateSmartFee(num_blocks, &fee_calc, conservative);
+        if (returned_target) {
+            *returned_target = fee_calc.returnedTarget;
+        }
+        return result;
+    }
+    CFeeRate getDustRelayFee() override { return ::dustRelayFee; }
+    CFeeRate getFallbackFee() override { CHECK_WALLET(return CWallet::fallbackFee); }
+    CFeeRate getPayTxFee() override { CHECK_WALLET(return ::payTxFee); }
+    void setPayTxFee(CFeeRate rate) override { CHECK_WALLET(::payTxFee = rate); }
+    UniValue executeRpc(const std::string& command, const UniValue& params, const std::string& uri) override
+    {
+        JSONRPCRequest req;
+        req.params = params;
+        req.strMethod = command;
+        req.URI = uri;
+        return ::tableRPC.execute(req);
+    }
+    std::vector<std::string> listRpcCommands() override { return ::tableRPC.listCommands(); }
+    void rpcSetTimerInterfaceIfUnset(RPCTimerInterface* iface) override { ::RPCSetTimerInterfaceIfUnset(iface); }
+    void rpcUnsetTimerInterface(RPCTimerInterface* iface) override { ::RPCUnsetTimerInterface(iface); }
+    bool getUnspentOutput(const COutPoint& output, Coin& coin) override
+    {
+        LOCK(::cs_main);
+        return ::pcoinsTip->GetCoin(output, coin);
+    }
+    std::unique_ptr<Wallet> getWallet(size_t index) override
+    {
+        CHECK_WALLET(return index < ::vpwallets.size() ? MakeUnique<WalletImpl>(*::vpwallets[index]) :
+                                                         std::unique_ptr<WalletImpl>());
+    }
+    std::unique_ptr<Handler> handleInitMessage(InitMessageFn fn) override
+    {
+        return MakeUnique<HandlerImpl>(::uiInterface.InitMessage.connect(fn));
+    }
+    std::unique_ptr<Handler> handleMessageBox(MessageBoxFn fn) override
+    {
+        return MakeUnique<HandlerImpl>(::uiInterface.ThreadSafeMessageBox.connect(fn));
+    }
+    std::unique_ptr<Handler> handleQuestion(QuestionFn fn) override
+    {
+        return MakeUnique<HandlerImpl>(::uiInterface.ThreadSafeQuestion.connect(fn));
+    }
+    std::unique_ptr<Handler> handleShowProgress(ShowProgressFn fn) override
+    {
+        return MakeUnique<HandlerImpl>(::uiInterface.ShowProgress.connect(fn));
+    }
+    std::unique_ptr<Handler> handleLoadWallet(LoadWalletFn fn) override
+    {
+        CHECK_WALLET(return MakeUnique<HandlerImpl>(
+            ::uiInterface.LoadWallet.connect([fn](CWallet* wallet) { fn(MakeUnique<WalletImpl>(*wallet)); })));
+    }
+    std::unique_ptr<Handler> handleNotifyNumConnectionsChanged(NotifyNumConnectionsChangedFn fn) override
+    {
+        return MakeUnique<HandlerImpl>(::uiInterface.NotifyNumConnectionsChanged.connect(fn));
+    }
+    std::unique_ptr<Handler> handleNotifyNetworkActiveChanged(NotifyNetworkActiveChangedFn fn) override
+    {
+        return MakeUnique<HandlerImpl>(::uiInterface.NotifyNetworkActiveChanged.connect(fn));
+    }
+    std::unique_ptr<Handler> handleNotifyAlertChanged(NotifyAlertChangedFn fn) override
+    {
+        return MakeUnique<HandlerImpl>(::uiInterface.NotifyAlertChanged.connect(fn));
+    }
+    std::unique_ptr<Handler> handleBannedListChanged(BannedListChangedFn fn) override
+    {
+        return MakeUnique<HandlerImpl>(::uiInterface.BannedListChanged.connect(fn));
+    }
+    std::unique_ptr<Handler> handleNotifyBlockTip(NotifyBlockTipFn fn) override
+    {
+        return MakeUnique<HandlerImpl>(
+            ::uiInterface.NotifyBlockTip.connect([fn](bool initial_download, const CBlockIndex* block) {
+                fn(initial_download, block->nHeight, block->GetBlockTime(),
+                    ::GuessVerificationProgress(::Params().TxData(), block));
+            }));
+    }
+    std::unique_ptr<Handler> handleNotifyHeaderTip(NotifyHeaderTipFn fn) override
+    {
+        return MakeUnique<HandlerImpl>(
+            ::uiInterface.NotifyHeaderTip.connect([fn](bool initial_download, const CBlockIndex* block) {
+                fn(initial_download, block->nHeight, block->GetBlockTime(),
+                    ::GuessVerificationProgress(::Params().TxData(), block));
+            }));
+    }
+
+    boost::thread_group m_thread_group;
+    ::CScheduler m_scheduler;
+    std::function<void(void)> m_break_action;
+    CCriticalSection m_break_action_lock;
+    boost::signals2::scoped_connection m_break_action_connection{
+        ::uiInterface.SetProgressBreakAction.connect([this](std::function<void(void)> action) {
+            LOCK(m_break_action_lock);
+            m_break_action = std::move(action);
+        })};
+};
+
+} // namespace
+
+std::unique_ptr<Node> MakeNode() { return MakeUnique<NodeImpl>(); }
+
+} // namespace local
+} // namespace ipc
diff --git a/src/ipc/local/interfaces.h b/src/ipc/local/interfaces.h
new file mode 100644
index 00000000000..fe2def29cc4
--- /dev/null
+++ b/src/ipc/local/interfaces.h
@@ -0,0 +1,19 @@
+#ifndef BITCOIN_IPC_LOCAL_INTERFACES_H
+#define BITCOIN_IPC_LOCAL_INTERFACES_H
+
+#include <memory>
+
+namespace ipc {
+
+class Node;
+
+namespace local {
+
+//! Return local, in-process implementation of ipc::Node interface.
+std::unique_ptr<Node> MakeNode();
+
+} // namespace local
+
+} // namespace ipc
+
+#endif // BITCOIN_IPC_LOCAL_INTERFACES_H
diff --git a/src/ipc/util.h b/src/ipc/util.h
new file mode 100644
index 00000000000..d4e32d95332
--- /dev/null
+++ b/src/ipc/util.h
@@ -0,0 +1,17 @@
+#ifndef BITCOIN_IPC_UTIL_H
+#define BITCOIN_IPC_UTIL_H
+
+#include <memory>
+
+namespace ipc {
+
+//! Substitute for for C++14 std::make_unique.
+template <typename T, typename... Args>
+std::unique_ptr<T> MakeUnique(Args&&... args)
+{
+    return std::unique_ptr<T>(new T(std::forward<Args>(args)...));
+}
+
+} // namespace ipc
+
+#endif // BITCOIN_IPC_UTIL_H
diff --git a/src/net_processing.h b/src/net_processing.h
index db6d81e6b67..eb82aef6189 100644
--- a/src/net_processing.h
+++ b/src/net_processing.h
@@ -41,9 +41,9 @@ class PeerLogicValidation : public CValidationInterface {
 };
 
 struct CNodeStateStats {
-    int nMisbehavior;
-    int nSyncHeight;
-    int nCommonHeight;
+    int nMisbehavior = 0;
+    int nSyncHeight = -1;
+    int nCommonHeight = -1;
     std::vector<int> vHeightInFlight;
 };
 
diff --git a/src/qt/addresstablemodel.cpp b/src/qt/addresstablemodel.cpp
index 2fa032abdc4..70a841e9d9c 100644
--- a/src/qt/addresstablemodel.cpp
+++ b/src/qt/addresstablemodel.cpp
@@ -8,7 +8,7 @@
 #include "walletmodel.h"
 
 #include "base58.h"
-#include "wallet/wallet.h"
+#include "ipc/interfaces.h"
 
 
 #include <QFont>
@@ -68,28 +68,23 @@ static AddressTableEntry::Type translateTransactionType(const QString &strPurpos
 class AddressTablePriv
 {
 public:
-    CWallet *wallet;
     QList<AddressTableEntry> cachedAddressTable;
     AddressTableModel *parent;
 
-    AddressTablePriv(CWallet *_wallet, AddressTableModel *_parent):
-        wallet(_wallet), parent(_parent) {}
+    AddressTablePriv(AddressTableModel *_parent):
+        parent(_parent) {}
 
-    void refreshAddressTable()
+    void refreshAddressTable(ipc::Wallet& ipc_wallet)
     {
         cachedAddressTable.clear();
         {
-            LOCK(wallet->cs_wallet);
-            for (const std::pair<CTxDestination, CAddressBookData>& item : wallet->mapAddressBook)
+            for (const auto& address : ipc_wallet.getAddresses())
             {
-                const CBitcoinAddress& address = item.first;
-                bool fMine = IsMine(*wallet, address.Get());
                 AddressTableEntry::Type addressType = translateTransactionType(
-                        QString::fromStdString(item.second.purpose), fMine);
-                const std::string& strName = item.second.name;
+                        QString::fromStdString(address.purpose), address.is_mine);
                 cachedAddressTable.append(AddressTableEntry(addressType,
-                                  QString::fromStdString(strName),
-                                  QString::fromStdString(address.ToString())));
+                                  QString::fromStdString(address.name),
+                                  QString::fromStdString(CBitcoinAddress(address.dest).ToString())));
             }
         }
         // qLowerBound() and qUpperBound() require our cachedAddressTable list to be sorted in asc order
@@ -163,12 +158,12 @@ class AddressTablePriv
     }
 };
 
-AddressTableModel::AddressTableModel(CWallet *_wallet, WalletModel *parent) :
-    QAbstractTableModel(parent),walletModel(parent),wallet(_wallet),priv(0)
+AddressTableModel::AddressTableModel(WalletModel *parent) :
+    QAbstractTableModel(parent),walletModel(parent),priv(0)
 {
     columns << tr("Label") << tr("Address");
-    priv = new AddressTablePriv(wallet, this);
-    priv->refreshAddressTable();
+    priv = new AddressTablePriv(this);
+    priv->refreshAddressTable(parent->getIpcWallet());
 }
 
 AddressTableModel::~AddressTableModel()
@@ -245,7 +240,6 @@ bool AddressTableModel::setData(const QModelIndex &index, const QVariant &value,
 
     if(role == Qt::EditRole)
     {
-        LOCK(wallet->cs_wallet); /* For SetAddressBook / DelAddressBook */
         CTxDestination curAddress = CBitcoinAddress(rec->address.toStdString()).Get();
         if(index.column() == Label)
         {
@@ -255,7 +249,7 @@ bool AddressTableModel::setData(const QModelIndex &index, const QVariant &value,
                 editStatus = NO_CHANGES;
                 return false;
             }
-            wallet->SetAddressBook(curAddress, value.toString().toStdString(), strPurpose);
+            walletModel->getIpcWallet().setAddressBook(curAddress, value.toString().toStdString(), strPurpose);
         } else if(index.column() == Address) {
             CTxDestination newAddress = CBitcoinAddress(value.toString().toStdString()).Get();
             // Refuse to set invalid address, set error status and return false
@@ -272,7 +266,7 @@ bool AddressTableModel::setData(const QModelIndex &index, const QVariant &value,
             }
             // Check for duplicate addresses to prevent accidental deletion of addresses, if you try
             // to paste an existing address over another address (with a different label)
-            else if(wallet->mapAddressBook.count(newAddress))
+            if (walletModel->getIpcWallet().getAddress(newAddress))
             {
                 editStatus = DUPLICATE_ADDRESS;
                 return false;
@@ -281,9 +275,9 @@ bool AddressTableModel::setData(const QModelIndex &index, const QVariant &value,
             else if(rec->type == AddressTableEntry::Sending)
             {
                 // Remove old entry
-                wallet->DelAddressBook(curAddress);
+                walletModel->getIpcWallet().delAddressBook(curAddress);
                 // Add new entry with new address
-                wallet->SetAddressBook(newAddress, rec->label.toStdString(), strPurpose);
+                walletModel->getIpcWallet().setAddressBook(newAddress, value.toString().toStdString(), strPurpose);
             }
         }
         return true;
@@ -357,8 +351,7 @@ QString AddressTableModel::addRow(const QString &type, const QString &label, con
         }
         // Check for duplicate addresses
         {
-            LOCK(wallet->cs_wallet);
-            if(wallet->mapAddressBook.count(CBitcoinAddress(strAddress).Get()))
+            if(walletModel->getIpcWallet().getAddress(CBitcoinAddress(strAddress).Get()))
             {
                 editStatus = DUPLICATE_ADDRESS;
                 return QString();
@@ -369,7 +362,7 @@ QString AddressTableModel::addRow(const QString &type, const QString &label, con
     {
         // Generate a new address to associate with given label
         CPubKey newKey;
-        if(!wallet->GetKeyFromPool(newKey))
+        if(!walletModel->getIpcWallet().getKeyFromPool(newKey))
         {
             WalletModel::UnlockContext ctx(walletModel->requestUnlock());
             if(!ctx.isValid())
@@ -378,7 +371,7 @@ QString AddressTableModel::addRow(const QString &type, const QString &label, con
                 editStatus = WALLET_UNLOCK_FAILURE;
                 return QString();
             }
-            if(!wallet->GetKeyFromPool(newKey))
+            if(!walletModel->getIpcWallet().getKeyFromPool(newKey))
             {
                 editStatus = KEY_GENERATION_FAILURE;
                 return QString();
@@ -393,8 +386,7 @@ QString AddressTableModel::addRow(const QString &type, const QString &label, con
 
     // Add entry
     {
-        LOCK(wallet->cs_wallet);
-        wallet->SetAddressBook(CBitcoinAddress(strAddress).Get(), strLabel,
+        walletModel->getIpcWallet().setAddressBook(CBitcoinAddress(strAddress).Get(), strLabel,
                                (type == Send ? "send" : "receive"));
     }
     return QString::fromStdString(strAddress);
@@ -411,8 +403,7 @@ bool AddressTableModel::removeRows(int row, int count, const QModelIndex &parent
         return false;
     }
     {
-        LOCK(wallet->cs_wallet);
-        wallet->DelAddressBook(CBitcoinAddress(rec->address.toStdString()).Get());
+        walletModel->getIpcWallet().delAddressBook(CBitcoinAddress(rec->address.toStdString()).Get());
     }
     return true;
 }
@@ -422,12 +413,11 @@ bool AddressTableModel::removeRows(int row, int count, const QModelIndex &parent
 QString AddressTableModel::labelForAddress(const QString &address) const
 {
     {
-        LOCK(wallet->cs_wallet);
         CBitcoinAddress address_parsed(address.toStdString());
-        std::map<CTxDestination, CAddressBookData>::iterator mi = wallet->mapAddressBook.find(address_parsed.Get());
-        if (mi != wallet->mapAddressBook.end())
+        std::string name;
+        if (walletModel->getIpcWallet().getAddress(address_parsed.Get(), &name))
         {
-            return QString::fromStdString(mi->second.name);
+            return QString::fromStdString(name);
         }
     }
     return QString();
diff --git a/src/qt/addresstablemodel.h b/src/qt/addresstablemodel.h
index d04b95ebaeb..c9fe1987236 100644
--- a/src/qt/addresstablemodel.h
+++ b/src/qt/addresstablemodel.h
@@ -11,7 +11,9 @@
 class AddressTablePriv;
 class WalletModel;
 
-class CWallet;
+namespace ipc {
+class Wallet;
+}
 
 /**
    Qt model of the address book in the core. This allows views to access and modify the address book.
@@ -21,7 +23,7 @@ class AddressTableModel : public QAbstractTableModel
     Q_OBJECT
 
 public:
-    explicit AddressTableModel(CWallet *wallet, WalletModel *parent = 0);
+    explicit AddressTableModel(WalletModel *parent = 0);
     ~AddressTableModel();
 
     enum ColumnIndex {
@@ -76,7 +78,6 @@ class AddressTableModel : public QAbstractTableModel
 
 private:
     WalletModel *walletModel;
-    CWallet *wallet;
     AddressTablePriv *priv;
     QStringList columns;
     EditStatus editStatus;
diff --git a/src/qt/bantablemodel.cpp b/src/qt/bantablemodel.cpp
index f8a99506c13..28fc9b2de37 100644
--- a/src/qt/bantablemodel.cpp
+++ b/src/qt/bantablemodel.cpp
@@ -8,6 +8,7 @@
 #include "guiconstants.h"
 #include "guiutil.h"
 
+#include "ipc/interfaces.h"
 #include "sync.h"
 #include "utiltime.h"
 
@@ -45,11 +46,10 @@ class BanTablePriv
     Qt::SortOrder sortOrder;
 
     /** Pull a full list of banned nodes from CNode into our cache */
-    void refreshBanlist()
+    void refreshBanlist(ipc::Node& ipc_node)
     {
         banmap_t banMap;
-        if(g_connman)
-            g_connman->GetBanned(banMap);
+        ipc_node.getBanned(banMap);
 
         cachedBanlist.clear();
 #if QT_VERSION >= 0x040700
@@ -82,8 +82,9 @@ class BanTablePriv
     }
 };
 
-BanTableModel::BanTableModel(ClientModel *parent) :
+BanTableModel::BanTableModel(ipc::Node& ipc_node, ClientModel *parent) :
     QAbstractTableModel(parent),
+    m_ipc_node(ipc_node),
     clientModel(parent)
 {
     columns << tr("IP/Netmask") << tr("Banned Until");
@@ -168,7 +169,7 @@ QModelIndex BanTableModel::index(int row, int column, const QModelIndex &parent)
 void BanTableModel::refresh()
 {
     Q_EMIT layoutAboutToBeChanged();
-    priv->refreshBanlist();
+    priv->refreshBanlist(m_ipc_node);
     Q_EMIT layoutChanged();
 }
 
diff --git a/src/qt/bantablemodel.h b/src/qt/bantablemodel.h
index 062cfdc9315..b443f3590e9 100644
--- a/src/qt/bantablemodel.h
+++ b/src/qt/bantablemodel.h
@@ -13,6 +13,10 @@
 class ClientModel;
 class BanTablePriv;
 
+namespace ipc {
+    class Node;
+}
+
 struct CCombinedBan {
     CSubNet subnet;
     CBanEntry banEntry;
@@ -39,7 +43,7 @@ class BanTableModel : public QAbstractTableModel
     Q_OBJECT
 
 public:
-    explicit BanTableModel(ClientModel *parent = 0);
+    explicit BanTableModel(ipc::Node& ipc_node, ClientModel *parent = 0);
     ~BanTableModel();
     void startAutoRefresh();
     void stopAutoRefresh();
@@ -65,6 +69,7 @@ public Q_SLOTS:
     void refresh();
 
 private:
+    ipc::Node& m_ipc_node;
     ClientModel *clientModel;
     QStringList columns;
     std::unique_ptr<BanTablePriv> priv;
diff --git a/src/qt/bitcoin.cpp b/src/qt/bitcoin.cpp
index 2b6bd354a09..88a7d01f72b 100644
--- a/src/qt/bitcoin.cpp
+++ b/src/qt/bitcoin.cpp
@@ -27,16 +27,13 @@
 #endif
 
 #include "init.h"
+#include "ipc/interfaces.h"
 #include "rpc/server.h"
 #include "scheduler.h"
 #include "ui_interface.h"
 #include "util.h"
 #include "warnings.h"
 
-#ifdef ENABLE_WALLET
-#include "wallet/wallet.h"
-#endif
-
 #include <stdint.h>
 
 #include <boost/thread.hpp>
@@ -177,11 +174,7 @@ class BitcoinCore: public QObject
 {
     Q_OBJECT
 public:
-    explicit BitcoinCore();
-    /** Basic initialization, before starting initialization/shutdown thread.
-     * Return true on success.
-     */
-    static bool baseInitialize();
+    explicit BitcoinCore(ipc::Node& ipc_node);
 
 public Q_SLOTS:
     void initialize();
@@ -193,11 +186,10 @@ public Q_SLOTS:
     void runawayException(const QString &message);
 
 private:
-    boost::thread_group threadGroup;
-    CScheduler scheduler;
-
     /// Pass fatal exception message to UI thread
     void handleRunawayException(const std::exception *e);
+
+    ipc::Node& m_ipc_node;
 };
 
 /** Main Bitcoin application object */
@@ -205,7 +197,7 @@ class BitcoinApplication: public QApplication
 {
     Q_OBJECT
 public:
-    explicit BitcoinApplication(int &argc, char **argv);
+    explicit BitcoinApplication(ipc::Node& ipc_node, int &argc, char **argv);
     ~BitcoinApplication();
 
 #ifdef ENABLE_WALLET
@@ -246,6 +238,7 @@ public Q_SLOTS:
 
 private:
     QThread *coreThread;
+    ipc::Node& m_ipc_node;
     OptionsModel *optionsModel;
     ClientModel *clientModel;
     BitcoinGUI *window;
@@ -263,36 +256,15 @@ public Q_SLOTS:
 
 #include "bitcoin.moc"
 
-BitcoinCore::BitcoinCore():
-    QObject()
+BitcoinCore::BitcoinCore(ipc::Node& ipc_node) :
+    QObject(), m_ipc_node(ipc_node)
 {
 }
 
 void BitcoinCore::handleRunawayException(const std::exception *e)
 {
     PrintExceptionContinue(e, "Runaway exception");
-    Q_EMIT runawayException(QString::fromStdString(GetWarnings("gui")));
-}
-
-bool BitcoinCore::baseInitialize()
-{
-    if (!AppInitBasicSetup())
-    {
-        return false;
-    }
-    if (!AppInitParameterInteraction())
-    {
-        return false;
-    }
-    if (!AppInitSanityChecks())
-    {
-        return false;
-    }
-    if (!AppInitLockDataDirectory())
-    {
-        return false;
-    }
-    return true;
+    Q_EMIT runawayException(QString::fromStdString(m_ipc_node.getWarnings("gui")));
 }
 
 void BitcoinCore::initialize()
@@ -300,7 +272,7 @@ void BitcoinCore::initialize()
     try
     {
         qDebug() << __func__ << ": Running initialization in thread";
-        bool rv = AppInitMain(threadGroup, scheduler);
+        bool rv = m_ipc_node.appInitMain();
         Q_EMIT initializeResult(rv);
     } catch (const std::exception& e) {
         handleRunawayException(&e);
@@ -314,9 +286,7 @@ void BitcoinCore::shutdown()
     try
     {
         qDebug() << __func__ << ": Running Shutdown in thread";
-        Interrupt(threadGroup);
-        threadGroup.join_all();
-        Shutdown();
+        m_ipc_node.appShutdown();
         qDebug() << __func__ << ": Shutdown finished";
         Q_EMIT shutdownResult();
     } catch (const std::exception& e) {
@@ -326,9 +296,10 @@ void BitcoinCore::shutdown()
     }
 }
 
-BitcoinApplication::BitcoinApplication(int &argc, char **argv):
+BitcoinApplication::BitcoinApplication(ipc::Node& ipc_node, int &argc, char **argv):
     QApplication(argc, argv),
     coreThread(0),
+    m_ipc_node(ipc_node),
     optionsModel(0),
     clientModel(0),
     window(0),
@@ -383,12 +354,12 @@ void BitcoinApplication::createPaymentServer()
 
 void BitcoinApplication::createOptionsModel(bool resetSettings)
 {
-    optionsModel = new OptionsModel(nullptr, resetSettings);
+    optionsModel = new OptionsModel(m_ipc_node, nullptr, resetSettings);
 }
 
 void BitcoinApplication::createWindow(const NetworkStyle *networkStyle)
 {
-    window = new BitcoinGUI(platformStyle, networkStyle, 0);
+    window = new BitcoinGUI(m_ipc_node, platformStyle, networkStyle, 0);
 
     pollShutdownTimer = new QTimer(window);
     connect(pollShutdownTimer, SIGNAL(timeout()), window, SLOT(detectShutdown()));
@@ -397,7 +368,7 @@ void BitcoinApplication::createWindow(const NetworkStyle *networkStyle)
 
 void BitcoinApplication::createSplashScreen(const NetworkStyle *networkStyle)
 {
-    SplashScreen *splash = new SplashScreen(0, networkStyle);
+    SplashScreen *splash = new SplashScreen(m_ipc_node, 0, networkStyle);
     // We don't hold a direct pointer to the splash screen after creation, but the splash
     // screen will take care of deleting itself when slotFinish happens.
     splash->show();
@@ -410,7 +381,7 @@ void BitcoinApplication::startThread()
     if(coreThread)
         return;
     coreThread = new QThread(this);
-    BitcoinCore *executor = new BitcoinCore();
+    BitcoinCore *executor = new BitcoinCore(m_ipc_node);
     executor->moveToThread(coreThread);
 
     /*  communication to and from thread */
@@ -428,8 +399,8 @@ void BitcoinApplication::startThread()
 
 void BitcoinApplication::parameterSetup()
 {
-    InitLogging();
-    InitParameterInteraction();
+    m_ipc_node.initLogging();
+    m_ipc_node.initParameterInteraction();
 }
 
 void BitcoinApplication::requestInitialize()
@@ -460,7 +431,7 @@ void BitcoinApplication::requestShutdown()
     delete clientModel;
     clientModel = 0;
 
-    StartShutdown();
+    m_ipc_node.startShutdown();
 
     // Request shutdown from core thread
     Q_EMIT requestedShutdown();
@@ -480,20 +451,20 @@ void BitcoinApplication::initializeResult(bool success)
         paymentServer->setOptionsModel(optionsModel);
 #endif
 
-        clientModel = new ClientModel(optionsModel);
+        clientModel = new ClientModel(m_ipc_node, optionsModel);
         window->setClientModel(clientModel);
 
 #ifdef ENABLE_WALLET
         // TODO: Expose secondary wallets
-        if (!vpwallets.empty())
+        if (auto walletMain = m_ipc_node.getWallet(0))
         {
-            walletModel = new WalletModel(platformStyle, vpwallets[0], optionsModel);
+            walletModel = new WalletModel(std::move(walletMain), m_ipc_node, platformStyle, optionsModel);
 
             window->addWallet(BitcoinGUI::DEFAULT_WALLET, walletModel);
             window->setCurrentWallet(BitcoinGUI::DEFAULT_WALLET);
 
-            connect(walletModel, SIGNAL(coinsSent(CWallet*,SendCoinsRecipient,QByteArray)),
-                             paymentServer, SLOT(fetchPaymentACK(CWallet*,const SendCoinsRecipient&,QByteArray)));
+            connect(walletModel, SIGNAL(coinsSent(WalletModel*,SendCoinsRecipient,QByteArray)),
+                             paymentServer, SLOT(fetchPaymentACK(WalletModel*,const SendCoinsRecipient&,QByteArray)));
         }
 #endif
 
@@ -548,9 +519,12 @@ int main(int argc, char *argv[])
 {
     SetupEnvironment();
 
+    std::unique_ptr<ipc::Node> ipc_node;
+    ipc_node = ipc::MakeNode(ipc::LOCAL);
+
     /// 1. Parse command-line options. These take precedence over anything else.
     // Command-line options take precedence:
-    gArgs.ParseParameters(argc, argv);
+    ipc_node->parseParameters(argc, argv);
 
     // Do not refer to data directory yet, this can be overridden by Intro::pickDataDirectory
 
@@ -564,7 +538,7 @@ int main(int argc, char *argv[])
     Q_INIT_RESOURCE(bitcoin);
     Q_INIT_RESOURCE(bitcoin_locale);
 
-    BitcoinApplication app(argc, argv);
+    BitcoinApplication app(*ipc_node, argc, argv);
 #if QT_VERSION > 0x050100
     // Generate high-dpi pixmaps
     QApplication::setAttribute(Qt::AA_UseHighDpiPixmaps);
@@ -588,7 +562,6 @@ int main(int argc, char *argv[])
     //   Need to pass name here as CAmount is a typedef (see http://qt-project.org/doc/qt-5/qmetatype.html#qRegisterMetaType)
     //   IMPORTANT if it is no longer a typedef use the normal variant above
     qRegisterMetaType< CAmount >("CAmount");
-    qRegisterMetaType< std::function<void(void)> >("std::function<void(void)>");
 
     /// 3. Application identification
     // must be set before OptionsModel is initialized or translations are loaded,
@@ -608,14 +581,14 @@ int main(int argc, char *argv[])
     // but before showing splash screen.
     if (gArgs.IsArgSet("-?") || gArgs.IsArgSet("-h") || gArgs.IsArgSet("-help") || gArgs.IsArgSet("-version"))
     {
-        HelpMessageDialog help(nullptr, gArgs.IsArgSet("-version"));
+        HelpMessageDialog help(*ipc_node, nullptr, gArgs.IsArgSet("-version"));
         help.showOrPrint();
         return EXIT_SUCCESS;
     }
 
     /// 5. Now that settings and translations are available, ask user for data directory
     // User language is set up: pick a data directory
-    if (!Intro::pickDataDirectory())
+    if (!Intro::pickDataDirectory(*ipc_node))
         return EXIT_SUCCESS;
 
     /// 6. Determine availability of data directory and parse bitcoin.conf
@@ -627,7 +600,7 @@ int main(int argc, char *argv[])
         return EXIT_FAILURE;
     }
     try {
-        gArgs.ReadConfigFile(gArgs.GetArg("-conf", BITCOIN_CONF_FILENAME));
+        ipc_node->readConfigFile(gArgs.GetArg("-conf", BITCOIN_CONF_FILENAME));
     } catch (const std::exception& e) {
         QMessageBox::critical(0, QObject::tr(PACKAGE_NAME),
                               QObject::tr("Error: Cannot parse configuration file: %1. Only use key=value syntax.").arg(e.what()));
@@ -642,14 +615,14 @@ int main(int argc, char *argv[])
 
     // Check for -testnet or -regtest parameter (Params() calls are only valid after this clause)
     try {
-        SelectParams(ChainNameFromCommandLine());
+        ipc_node->selectParams(ChainNameFromCommandLine());
     } catch(std::exception &e) {
         QMessageBox::critical(0, QObject::tr(PACKAGE_NAME), QObject::tr("Error: %1").arg(e.what()));
         return EXIT_FAILURE;
     }
 #ifdef ENABLE_WALLET
     // Parse URIs on command line -- this can affect Params()
-    PaymentServer::ipcParseCommandLine(argc, argv);
+    PaymentServer::ipcParseCommandLine(*ipc_node, argc, argv);
 #endif
 
     QScopedPointer<const NetworkStyle> networkStyle(NetworkStyle::instantiate(QString::fromStdString(Params().NetworkIDString())));
@@ -694,7 +667,7 @@ int main(int argc, char *argv[])
     app.createOptionsModel(gArgs.IsArgSet("-resetguisettings"));
 
     // Subscribe to global signals from core
-    uiInterface.InitMessage.connect(InitMessage);
+    std::unique_ptr<ipc::Handler> m_handler_init_message = ipc_node->handleInitMessage(InitMessage);
 
     if (gArgs.GetBoolArg("-splash", DEFAULT_SPLASHSCREEN) && !gArgs.GetBoolArg("-min", false))
         app.createSplashScreen(networkStyle.data());
@@ -706,7 +679,7 @@ int main(int argc, char *argv[])
         // Perform base initialization before spinning up initialization/shutdown thread
         // This is acceptable because this function only contains steps that are quick to execute,
         // so the GUI thread won't be held up.
-        if (BitcoinCore::baseInitialize()) {
+        if (ipc_node->baseInitialize()) {
             app.requestInitialize();
 #if defined(Q_OS_WIN) && QT_VERSION >= 0x050000
             WinShutdownMonitor::registerShutdownBlockReason(QObject::tr("%1 didn't yet exit safely...").arg(QObject::tr(PACKAGE_NAME)), (HWND)app.getMainWinId());
@@ -721,10 +694,10 @@ int main(int argc, char *argv[])
         }
     } catch (const std::exception& e) {
         PrintExceptionContinue(&e, "Runaway exception");
-        app.handleRunawayException(QString::fromStdString(GetWarnings("gui")));
+        app.handleRunawayException(QString::fromStdString(ipc_node->getWarnings("gui")));
     } catch (...) {
         PrintExceptionContinue(nullptr, "Runaway exception");
-        app.handleRunawayException(QString::fromStdString(GetWarnings("gui")));
+        app.handleRunawayException(QString::fromStdString(ipc_node->getWarnings("gui")));
     }
     return rv;
 }
diff --git a/src/qt/bitcoingui.cpp b/src/qt/bitcoingui.cpp
index e3970298e61..e28a78a5238 100644
--- a/src/qt/bitcoingui.cpp
+++ b/src/qt/bitcoingui.cpp
@@ -33,6 +33,7 @@
 
 #include "chainparams.h"
 #include "init.h"
+#include "ipc/interfaces.h"
 #include "ui_interface.h"
 #include "util.h"
 
@@ -78,9 +79,10 @@ const std::string BitcoinGUI::DEFAULT_UIPLATFORM =
  * collisions in the future with additional wallets */
 const QString BitcoinGUI::DEFAULT_WALLET = "~Default";
 
-BitcoinGUI::BitcoinGUI(const PlatformStyle *_platformStyle, const NetworkStyle *networkStyle, QWidget *parent) :
+BitcoinGUI::BitcoinGUI(ipc::Node& ipc_node, const PlatformStyle *_platformStyle, const NetworkStyle *networkStyle, QWidget *parent) :
     QMainWindow(parent),
     enableWallet(false),
+    m_ipc_node(ipc_node),
     clientModel(0),
     walletFrame(0),
     unitDisplayControl(0),
@@ -150,8 +152,8 @@ BitcoinGUI::BitcoinGUI(const PlatformStyle *_platformStyle, const NetworkStyle *
     setUnifiedTitleAndToolBarOnMac(true);
 #endif
 
-    rpcConsole = new RPCConsole(_platformStyle, 0);
-    helpMessageDialog = new HelpMessageDialog(this, false);
+    rpcConsole = new RPCConsole(ipc_node, _platformStyle, 0);
+    helpMessageDialog = new HelpMessageDialog(ipc_node, this, false);
 #ifdef ENABLE_WALLET
     if(enableWallet)
     {
@@ -479,7 +481,7 @@ void BitcoinGUI::setClientModel(ClientModel *_clientModel)
         connect(_clientModel, SIGNAL(networkActiveChanged(bool)), this, SLOT(setNetworkActive(bool)));
 
         modalOverlay->setKnownBestHeight(_clientModel->getHeaderTipHeight(), QDateTime::fromTime_t(_clientModel->getHeaderTipTime()));
-        setNumBlocks(_clientModel->getNumBlocks(), _clientModel->getLastBlockDate(), _clientModel->getVerificationProgress(nullptr), false);
+        setNumBlocks(m_ipc_node.getNumBlocks(), QDateTime::fromTime_t(m_ipc_node.getLastBlockTime()), m_ipc_node.getVerificationProgress(), false);
         connect(_clientModel, SIGNAL(numBlocksChanged(int,QDateTime,double,bool)), this, SLOT(setNumBlocks(int,QDateTime,double,bool)));
 
         // Receive and report messages from client model
@@ -644,7 +646,7 @@ void BitcoinGUI::aboutClicked()
     if(!clientModel)
         return;
 
-    HelpMessageDialog dlg(this, true);
+    HelpMessageDialog dlg(m_ipc_node, this, true);
     dlg.exec();
 }
 
@@ -727,7 +729,7 @@ void BitcoinGUI::updateNetworkState()
 
     QString tooltip;
 
-    if (clientModel->getNetworkActive()) {
+    if (m_ipc_node.getNetworkActive()) {
         tooltip = tr("%n active connection(s) to Bitcoin network", "", count) + QString(".<br>") + tr("Click to disable network activity.");
     } else {
         tooltip = tr("Network activity disabled.") + QString("<br>") + tr("Click to enable network activity again.");
@@ -1110,7 +1112,7 @@ void BitcoinGUI::toggleHidden()
 
 void BitcoinGUI::detectShutdown()
 {
-    if (ShutdownRequested())
+    if (m_ipc_node.shutdownRequested())
     {
         if(rpcConsole)
             rpcConsole->hide();
@@ -1175,22 +1177,20 @@ static bool ThreadSafeMessageBox(BitcoinGUI *gui, const std::string& message, co
 void BitcoinGUI::subscribeToCoreSignals()
 {
     // Connect signals to client
-    uiInterface.ThreadSafeMessageBox.connect(boost::bind(ThreadSafeMessageBox, this, _1, _2, _3));
-    uiInterface.ThreadSafeQuestion.connect(boost::bind(ThreadSafeMessageBox, this, _1, _3, _4));
+    m_handler_message_box = m_ipc_node.handleMessageBox(boost::bind(ThreadSafeMessageBox, this, _1, _2, _3));
+    m_handler_question = m_ipc_node.handleQuestion(boost::bind(ThreadSafeMessageBox, this, _1, _3, _4));
 }
 
 void BitcoinGUI::unsubscribeFromCoreSignals()
 {
     // Disconnect signals from client
-    uiInterface.ThreadSafeMessageBox.disconnect(boost::bind(ThreadSafeMessageBox, this, _1, _2, _3));
-    uiInterface.ThreadSafeQuestion.disconnect(boost::bind(ThreadSafeMessageBox, this, _1, _3, _4));
+    m_handler_message_box->disconnect();
+    m_handler_question->disconnect();
 }
 
 void BitcoinGUI::toggleNetworkActive()
 {
-    if (clientModel) {
-        clientModel->setNetworkActive(!clientModel->getNetworkActive());
-    }
+    m_ipc_node.setNetworkActive(!m_ipc_node.getNetworkActive());
 }
 
 UnitDisplayStatusBarControl::UnitDisplayStatusBarControl(const PlatformStyle *platformStyle) :
diff --git a/src/qt/bitcoingui.h b/src/qt/bitcoingui.h
index aa45ea1f0a0..6da67f18a35 100644
--- a/src/qt/bitcoingui.h
+++ b/src/qt/bitcoingui.h
@@ -18,6 +18,8 @@
 #include <QPoint>
 #include <QSystemTrayIcon>
 
+#include <memory>
+
 class ClientModel;
 class NetworkStyle;
 class Notificator;
@@ -31,6 +33,11 @@ class WalletModel;
 class HelpMessageDialog;
 class ModalOverlay;
 
+namespace ipc {
+class Handler;
+class Node;
+}
+
 QT_BEGIN_NAMESPACE
 class QAction;
 class QProgressBar;
@@ -49,7 +56,7 @@ class BitcoinGUI : public QMainWindow
     static const QString DEFAULT_WALLET;
     static const std::string DEFAULT_UIPLATFORM;
 
-    explicit BitcoinGUI(const PlatformStyle *platformStyle, const NetworkStyle *networkStyle, QWidget *parent = 0);
+    explicit BitcoinGUI(ipc::Node& ipc_node, const PlatformStyle *platformStyle, const NetworkStyle *networkStyle, QWidget *parent = 0);
     ~BitcoinGUI();
 
     /** Set the client model.
@@ -77,6 +84,9 @@ class BitcoinGUI : public QMainWindow
     bool eventFilter(QObject *object, QEvent *event);
 
 private:
+    ipc::Node& m_ipc_node;
+    std::unique_ptr<ipc::Handler> m_handler_message_box;
+    std::unique_ptr<ipc::Handler> m_handler_question;
     ClientModel *clientModel;
     WalletFrame *walletFrame;
 
diff --git a/src/qt/clientmodel.cpp b/src/qt/clientmodel.cpp
index 52ce11cefd2..963c10bff89 100644
--- a/src/qt/clientmodel.cpp
+++ b/src/qt/clientmodel.cpp
@@ -13,6 +13,7 @@
 #include "chainparams.h"
 #include "checkpoints.h"
 #include "clientversion.h"
+#include "ipc/interfaces.h"
 #include "validation.h"
 #include "net.h"
 #include "txmempool.h"
@@ -30,8 +31,9 @@ class CBlockIndex;
 static int64_t nLastHeaderTipUpdateNotification = 0;
 static int64_t nLastBlockTipUpdateNotification = 0;
 
-ClientModel::ClientModel(OptionsModel *_optionsModel, QObject *parent) :
+ClientModel::ClientModel(ipc::Node& _ipcNode, OptionsModel *_optionsModel, QObject *parent) :
     QObject(parent),
+    m_ipc_node(_ipcNode),
     optionsModel(_optionsModel),
     peerTableModel(0),
     banTableModel(0),
@@ -39,8 +41,8 @@ ClientModel::ClientModel(OptionsModel *_optionsModel, QObject *parent) :
 {
     cachedBestHeaderHeight = -1;
     cachedBestHeaderTime = -1;
-    peerTableModel = new PeerTableModel(this);
-    banTableModel = new BanTableModel(this);
+    peerTableModel = new PeerTableModel(m_ipc_node, this);
+    banTableModel = new BanTableModel(m_ipc_node, this);
     pollTimer = new QTimer(this);
     connect(pollTimer, SIGNAL(timeout()), this, SLOT(updateTimer()));
     pollTimer->start(MODEL_UPDATE_DELAY);
@@ -64,15 +66,7 @@ int ClientModel::getNumConnections(unsigned int flags) const
     else if (flags == CONNECTIONS_ALL)
         connections = CConnman::CONNECTIONS_ALL;
 
-    if(g_connman)
-         return g_connman->GetNodeCount(connections);
-    return 0;
-}
-
-int ClientModel::getNumBlocks() const
-{
-    LOCK(cs_main);
-    return chainActive.Height();
+    return m_ipc_node.getNodeCount(connections);
 }
 
 int ClientModel::getHeaderTipHeight() const
@@ -80,10 +74,11 @@ int ClientModel::getHeaderTipHeight() const
     if (cachedBestHeaderHeight == -1) {
         // make sure we initially populate the cache via a cs_main lock
         // otherwise we need to wait for a tip update
-        LOCK(cs_main);
-        if (pindexBestHeader) {
-            cachedBestHeaderHeight = pindexBestHeader->nHeight;
-            cachedBestHeaderTime = pindexBestHeader->GetBlockTime();
+        int height;
+        int64_t blockTime;
+        if (m_ipc_node.getHeaderTip(height, blockTime)) {
+            cachedBestHeaderHeight = height;
+            cachedBestHeaderTime = blockTime;
         }
     }
     return cachedBestHeaderHeight;
@@ -92,66 +87,22 @@ int ClientModel::getHeaderTipHeight() const
 int64_t ClientModel::getHeaderTipTime() const
 {
     if (cachedBestHeaderTime == -1) {
-        LOCK(cs_main);
-        if (pindexBestHeader) {
-            cachedBestHeaderHeight = pindexBestHeader->nHeight;
-            cachedBestHeaderTime = pindexBestHeader->GetBlockTime();
+        int height;
+        int64_t blockTime;
+        if (m_ipc_node.getHeaderTip(height, blockTime)) {
+            cachedBestHeaderHeight = height;
+            cachedBestHeaderTime = blockTime;
         }
     }
     return cachedBestHeaderTime;
 }
 
-quint64 ClientModel::getTotalBytesRecv() const
-{
-    if(!g_connman)
-        return 0;
-    return g_connman->GetTotalBytesRecv();
-}
-
-quint64 ClientModel::getTotalBytesSent() const
-{
-    if(!g_connman)
-        return 0;
-    return g_connman->GetTotalBytesSent();
-}
-
-QDateTime ClientModel::getLastBlockDate() const
-{
-    LOCK(cs_main);
-
-    if (chainActive.Tip())
-        return QDateTime::fromTime_t(chainActive.Tip()->GetBlockTime());
-
-    return QDateTime::fromTime_t(Params().GenesisBlock().GetBlockTime()); // Genesis block's time of current network
-}
-
-long ClientModel::getMempoolSize() const
-{
-    return mempool.size();
-}
-
-size_t ClientModel::getMempoolDynamicUsage() const
-{
-    return mempool.DynamicMemoryUsage();
-}
-
-double ClientModel::getVerificationProgress(const CBlockIndex *tipIn) const
-{
-    CBlockIndex *tip = const_cast<CBlockIndex *>(tipIn);
-    if (!tip)
-    {
-        LOCK(cs_main);
-        tip = chainActive.Tip();
-    }
-    return GuessVerificationProgress(Params().TxData(), tip);
-}
-
 void ClientModel::updateTimer()
 {
     // no locking required at this point
     // the following calls will acquire the required lock
-    Q_EMIT mempoolSizeChanged(getMempoolSize(), getMempoolDynamicUsage());
-    Q_EMIT bytesChanged(getTotalBytesRecv(), getTotalBytesSent());
+    Q_EMIT mempoolSizeChanged(m_ipc_node.getMempoolSize(), m_ipc_node.getMempoolDynamicUsage());
+    Q_EMIT bytesChanged(m_ipc_node.getTotalBytesRecv(), m_ipc_node.getTotalBytesSent());
 }
 
 void ClientModel::updateNumConnections(int numConnections)
@@ -169,16 +120,11 @@ void ClientModel::updateAlert()
     Q_EMIT alertsChanged(getStatusBarWarnings());
 }
 
-bool ClientModel::inInitialBlockDownload() const
-{
-    return IsInitialBlockDownload();
-}
-
 enum BlockSource ClientModel::getBlockSource() const
 {
-    if (fReindex)
+    if (m_ipc_node.getReindex())
         return BLOCK_SOURCE_REINDEX;
-    else if (fImporting)
+    else if (m_ipc_node.getImporting())
         return BLOCK_SOURCE_DISK;
     else if (getNumConnections() > 0)
         return BLOCK_SOURCE_NETWORK;
@@ -186,24 +132,9 @@ enum BlockSource ClientModel::getBlockSource() const
     return BLOCK_SOURCE_NONE;
 }
 
-void ClientModel::setNetworkActive(bool active)
-{
-    if (g_connman) {
-         g_connman->SetNetworkActive(active);
-    }
-}
-
-bool ClientModel::getNetworkActive() const
-{
-    if (g_connman) {
-        return g_connman->GetNetworkActive();
-    }
-    return false;
-}
-
 QString ClientModel::getStatusBarWarnings() const
 {
-    return QString::fromStdString(GetWarnings("gui"));
+    return QString::fromStdString(m_ipc_node.getWarnings("gui"));
 }
 
 OptionsModel *ClientModel::getOptionsModel()
@@ -285,7 +216,7 @@ static void BannedListChanged(ClientModel *clientmodel)
     QMetaObject::invokeMethod(clientmodel, "updateBanlist", Qt::QueuedConnection);
 }
 
-static void BlockTipChanged(ClientModel *clientmodel, bool initialSync, const CBlockIndex *pIndex, bool fHeader)
+static void BlockTipChanged(ClientModel *clientmodel, bool initialSync, int height, int64_t blockTime, double verificationProgress, bool fHeader)
 {
     // lock free async UI updates in case we have a new block tip
     // during initial sync, only update the UI if the last update
@@ -298,16 +229,16 @@ static void BlockTipChanged(ClientModel *clientmodel, bool initialSync, const CB
 
     if (fHeader) {
         // cache best headers time and height to reduce future cs_main locks
-        clientmodel->cachedBestHeaderHeight = pIndex->nHeight;
-        clientmodel->cachedBestHeaderTime = pIndex->GetBlockTime();
+        clientmodel->cachedBestHeaderHeight = height;
+        clientmodel->cachedBestHeaderTime = blockTime;
     }
     // if we are in-sync, update the UI regardless of last update time
     if (!initialSync || now - nLastUpdateNotification > MODEL_UPDATE_DELAY) {
         //pass an async signal to the UI thread
         QMetaObject::invokeMethod(clientmodel, "numBlocksChanged", Qt::QueuedConnection,
-                                  Q_ARG(int, pIndex->nHeight),
-                                  Q_ARG(QDateTime, QDateTime::fromTime_t(pIndex->GetBlockTime())),
-                                  Q_ARG(double, clientmodel->getVerificationProgress(pIndex)),
+                                  Q_ARG(int, height),
+                                  Q_ARG(QDateTime, QDateTime::fromTime_t(blockTime)),
+                                  Q_ARG(double, verificationProgress),
                                   Q_ARG(bool, fHeader));
         nLastUpdateNotification = now;
     }
@@ -316,23 +247,23 @@ static void BlockTipChanged(ClientModel *clientmodel, bool initialSync, const CB
 void ClientModel::subscribeToCoreSignals()
 {
     // Connect signals to client
-    uiInterface.ShowProgress.connect(boost::bind(ShowProgress, this, _1, _2));
-    uiInterface.NotifyNumConnectionsChanged.connect(boost::bind(NotifyNumConnectionsChanged, this, _1));
-    uiInterface.NotifyNetworkActiveChanged.connect(boost::bind(NotifyNetworkActiveChanged, this, _1));
-    uiInterface.NotifyAlertChanged.connect(boost::bind(NotifyAlertChanged, this));
-    uiInterface.BannedListChanged.connect(boost::bind(BannedListChanged, this));
-    uiInterface.NotifyBlockTip.connect(boost::bind(BlockTipChanged, this, _1, _2, false));
-    uiInterface.NotifyHeaderTip.connect(boost::bind(BlockTipChanged, this, _1, _2, true));
+    m_handler_show_progress = m_ipc_node.handleShowProgress(boost::bind(ShowProgress, this, _1, _2));
+    m_handler_notify_num_connections_changed = m_ipc_node.handleNotifyNumConnectionsChanged(boost::bind(NotifyNumConnectionsChanged, this, _1));
+    m_handler_notify_network_active_changed = m_ipc_node.handleNotifyNetworkActiveChanged(boost::bind(NotifyNetworkActiveChanged, this, _1));
+    m_handler_notify_alert_changed = m_ipc_node.handleNotifyAlertChanged(boost::bind(NotifyAlertChanged, this));
+    m_handler_banned_list_changed = m_ipc_node.handleBannedListChanged(boost::bind(BannedListChanged, this));
+    m_handler_notify_block_tip = m_ipc_node.handleNotifyBlockTip(boost::bind(BlockTipChanged, this, _1, _2, _3, _4, false));
+    m_handler_notify_header_tip = m_ipc_node.handleNotifyHeaderTip(boost::bind(BlockTipChanged, this, _1, _2, _3, _4, true));
 }
 
 void ClientModel::unsubscribeFromCoreSignals()
 {
     // Disconnect signals from client
-    uiInterface.ShowProgress.disconnect(boost::bind(ShowProgress, this, _1, _2));
-    uiInterface.NotifyNumConnectionsChanged.disconnect(boost::bind(NotifyNumConnectionsChanged, this, _1));
-    uiInterface.NotifyNetworkActiveChanged.disconnect(boost::bind(NotifyNetworkActiveChanged, this, _1));
-    uiInterface.NotifyAlertChanged.disconnect(boost::bind(NotifyAlertChanged, this));
-    uiInterface.BannedListChanged.disconnect(boost::bind(BannedListChanged, this));
-    uiInterface.NotifyBlockTip.disconnect(boost::bind(BlockTipChanged, this, _1, _2, false));
-    uiInterface.NotifyHeaderTip.disconnect(boost::bind(BlockTipChanged, this, _1, _2, true));
+    m_handler_show_progress->disconnect();
+    m_handler_notify_num_connections_changed->disconnect();
+    m_handler_notify_network_active_changed->disconnect();
+    m_handler_notify_alert_changed->disconnect();
+    m_handler_banned_list_changed->disconnect();
+    m_handler_notify_block_tip->disconnect();
+    m_handler_notify_header_tip->disconnect();
 }
diff --git a/src/qt/clientmodel.h b/src/qt/clientmodel.h
index 6447cae1bb4..06794a7a345 100644
--- a/src/qt/clientmodel.h
+++ b/src/qt/clientmodel.h
@@ -9,6 +9,7 @@
 #include <QDateTime>
 
 #include <atomic>
+#include <memory>
 
 class BanTableModel;
 class OptionsModel;
@@ -16,6 +17,11 @@ class PeerTableModel;
 
 class CBlockIndex;
 
+namespace ipc {
+class Handler;
+class Node;
+}
+
 QT_BEGIN_NAMESPACE
 class QTimer;
 QT_END_NAMESPACE
@@ -40,37 +46,21 @@ class ClientModel : public QObject
     Q_OBJECT
 
 public:
-    explicit ClientModel(OptionsModel *optionsModel, QObject *parent = 0);
+    explicit ClientModel(ipc::Node& ipc_node, OptionsModel *optionsModel, QObject *parent = 0);
     ~ClientModel();
 
+    ipc::Node& getIpcNode() const { return m_ipc_node; }
     OptionsModel *getOptionsModel();
     PeerTableModel *getPeerTableModel();
     BanTableModel *getBanTableModel();
 
     //! Return number of connections, default is in- and outbound (total)
     int getNumConnections(unsigned int flags = CONNECTIONS_ALL) const;
-    int getNumBlocks() const;
     int getHeaderTipHeight() const;
     int64_t getHeaderTipTime() const;
-    //! Return number of transactions in the mempool
-    long getMempoolSize() const;
-    //! Return the dynamic memory usage of the mempool
-    size_t getMempoolDynamicUsage() const;
-    
-    quint64 getTotalBytesRecv() const;
-    quint64 getTotalBytesSent() const;
-
-    double getVerificationProgress(const CBlockIndex *tip) const;
-    QDateTime getLastBlockDate() const;
-
-    //! Return true if core is doing initial block download
-    bool inInitialBlockDownload() const;
+
     //! Returns enum BlockSource of the current importing/syncing state
     enum BlockSource getBlockSource() const;
-    //! Return true if network activity in core is enabled
-    bool getNetworkActive() const;
-    //! Toggle network activity state in core
-    void setNetworkActive(bool active);
     //! Return warnings to be displayed in status bar
     QString getStatusBarWarnings() const;
 
@@ -85,6 +75,14 @@ class ClientModel : public QObject
     mutable std::atomic<int64_t> cachedBestHeaderTime;
 
 private:
+    ipc::Node& m_ipc_node;
+    std::unique_ptr<ipc::Handler> m_handler_show_progress;
+    std::unique_ptr<ipc::Handler> m_handler_notify_num_connections_changed;
+    std::unique_ptr<ipc::Handler> m_handler_notify_network_active_changed;
+    std::unique_ptr<ipc::Handler> m_handler_notify_alert_changed;
+    std::unique_ptr<ipc::Handler> m_handler_banned_list_changed;
+    std::unique_ptr<ipc::Handler> m_handler_notify_block_tip;
+    std::unique_ptr<ipc::Handler> m_handler_notify_header_tip;
     OptionsModel *optionsModel;
     PeerTableModel *peerTableModel;
     BanTableModel *banTableModel;
diff --git a/src/qt/coincontroldialog.cpp b/src/qt/coincontroldialog.cpp
index f3ee0fbe393..576df181fb3 100644
--- a/src/qt/coincontroldialog.cpp
+++ b/src/qt/coincontroldialog.cpp
@@ -15,10 +15,9 @@
 
 #include "wallet/coincontrol.h"
 #include "init.h"
-#include "policy/fees.h"
+#include "ipc/interfaces.h"
 #include "policy/policy.h"
 #include "validation.h" // For mempool
-#include "wallet/wallet.h"
 
 #include <QApplication>
 #include <QCheckBox>
@@ -210,7 +209,7 @@ void CoinControlDialog::showMenu(const QPoint &point)
         if (item->text(COLUMN_TXHASH).length() == 64) // transaction hash is 64 characters (this means its a child node, so its not a parent node in tree mode)
         {
             copyTransactionHashAction->setEnabled(true);
-            if (model->isLockedCoin(uint256S(item->text(COLUMN_TXHASH).toStdString()), item->text(COLUMN_VOUT_INDEX).toUInt()))
+            if (model->getIpcWallet().isLockedCoin(COutPoint(uint256S(item->text(COLUMN_TXHASH).toStdString()), item->text(COLUMN_VOUT_INDEX).toUInt())))
             {
                 lockAction->setEnabled(false);
                 unlockAction->setEnabled(true);
@@ -270,7 +269,7 @@ void CoinControlDialog::lockCoin()
         contextMenuItem->setCheckState(COLUMN_CHECKBOX, Qt::Unchecked);
 
     COutPoint outpt(uint256S(contextMenuItem->text(COLUMN_TXHASH).toStdString()), contextMenuItem->text(COLUMN_VOUT_INDEX).toUInt());
-    model->lockCoin(outpt);
+    model->getIpcWallet().lockCoin(outpt);
     contextMenuItem->setDisabled(true);
     contextMenuItem->setIcon(COLUMN_CHECKBOX, platformStyle->SingleColorIcon(":/icons/lock_closed"));
     updateLabelLocked();
@@ -280,7 +279,7 @@ void CoinControlDialog::lockCoin()
 void CoinControlDialog::unlockCoin()
 {
     COutPoint outpt(uint256S(contextMenuItem->text(COLUMN_TXHASH).toStdString()), contextMenuItem->text(COLUMN_VOUT_INDEX).toUInt());
-    model->unlockCoin(outpt);
+    model->getIpcWallet().unlockCoin(outpt);
     contextMenuItem->setDisabled(false);
     contextMenuItem->setIcon(COLUMN_CHECKBOX, QIcon());
     updateLabelLocked();
@@ -406,7 +405,7 @@ void CoinControlDialog::viewItemChanged(QTreeWidgetItem* item, int column)
 void CoinControlDialog::updateLabelLocked()
 {
     std::vector<COutPoint> vOutpts;
-    model->listLockedCoins(vOutpts);
+    model->getIpcWallet().listLockedCoins(vOutpts);
     if (vOutpts.size() > 0)
     {
        ui->labelLocked->setText(tr("(%1 locked)").arg(vOutpts.size()));
@@ -432,7 +431,7 @@ void CoinControlDialog::updateLabels(WalletModel *model, QDialog* dialog)
         {
             CTxOut txout(amount, (CScript)std::vector<unsigned char>(24, 0));
             txDummy.vout.push_back(txout);
-            fDust |= IsDust(txout, ::dustRelayFee);
+            fDust |= IsDust(txout, model->getIpcNode().getDustRelayFee());
         }
     }
 
@@ -446,16 +445,16 @@ void CoinControlDialog::updateLabels(WalletModel *model, QDialog* dialog)
     bool fWitness               = false;
 
     std::vector<COutPoint> vCoinControl;
-    std::vector<COutput>   vOutputs;
     coinControl->ListSelected(vCoinControl);
-    model->getOutputs(vCoinControl, vOutputs);
 
-    for (const COutput& out : vOutputs) {
+    size_t i = 0;
+    for (const auto& out : model->getIpcWallet().getCoins(vCoinControl)) {
+        if (out.depth_in_main_chain < 0) continue;
+
         // unselect already spent, very unlikely scenario, this could happen
         // when selected are spent elsewhere, like rpc or another computer
-        uint256 txhash = out.tx->GetHash();
-        COutPoint outpt(txhash, out.i);
-        if (model->isSpent(outpt))
+        const COutPoint& outpt = vCoinControl[i++];
+        if (out.is_spent)
         {
             coinControl->UnSelect(outpt);
             continue;
@@ -465,22 +464,22 @@ void CoinControlDialog::updateLabels(WalletModel *model, QDialog* dialog)
         nQuantity++;
 
         // Amount
-        nAmount += out.tx->tx->vout[out.i].nValue;
+        nAmount += out.txout.nValue;
 
         // Bytes
         CTxDestination address;
         int witnessversion = 0;
         std::vector<unsigned char> witnessprogram;
-        if (out.tx->tx->vout[out.i].scriptPubKey.IsWitnessProgram(witnessversion, witnessprogram))
+        if (out.txout.scriptPubKey.IsWitnessProgram(witnessversion, witnessprogram))
         {
             nBytesInputs += (32 + 4 + 1 + (107 / WITNESS_SCALE_FACTOR) + 4);
             fWitness = true;
         }
-        else if(ExtractDestination(out.tx->tx->vout[out.i].scriptPubKey, address))
+        else if(ExtractDestination(out.txout.scriptPubKey, address))
         {
             CPubKey pubkey;
             CKeyID *keyid = boost::get<CKeyID>(&address);
-            if (keyid && model->getPubKey(*keyid, pubkey))
+            if (keyid && model->getIpcWallet().getPubKey(*keyid, pubkey))
             {
                 nBytesInputs += (pubkey.IsCompressed() ? 148 : 180);
             }
@@ -510,7 +509,7 @@ void CoinControlDialog::updateLabels(WalletModel *model, QDialog* dialog)
                 nBytes -= 34;
 
         // Fee
-        nPayFee = CWallet::GetMinimumFee(nBytes, *coinControl, ::mempool, ::feeEstimator, nullptr /* FeeCalculation */);
+        nPayFee = model->getIpcNode().getMinimumFee(nBytes, *coinControl, nullptr /* returned_target */, nullptr /* reason */);
 
         if (nPayAmount > 0)
         {
@@ -522,7 +521,7 @@ void CoinControlDialog::updateLabels(WalletModel *model, QDialog* dialog)
             if (nChange > 0 && nChange < MIN_CHANGE)
             {
                 CTxOut txout(nChange, (CScript)std::vector<unsigned char>(24, 0));
-                if (IsDust(txout, ::dustRelayFee))
+                if (IsDust(txout, model->getIpcNode().getDustRelayFee()))
                 {
                     nPayFee += nChange;
                     nChange = 0;
@@ -616,13 +615,10 @@ void CoinControlDialog::updateView()
 
     int nDisplayUnit = model->getOptionsModel()->getDisplayUnit();
 
-    std::map<QString, std::vector<COutput> > mapCoins;
-    model->listCoins(mapCoins);
-
-    for (const std::pair<QString, std::vector<COutput>>& coins : mapCoins) {
+    for (const auto& coins : model->getIpcWallet().listCoins()) {
         CCoinControlWidgetItem *itemWalletAddress = new CCoinControlWidgetItem();
         itemWalletAddress->setCheckState(COLUMN_CHECKBOX, Qt::Unchecked);
-        QString sWalletAddress = coins.first;
+        QString sWalletAddress = QString::fromStdString(CBitcoinAddress(coins.first).ToString());
         QString sWalletLabel = model->getAddressTableModel()->labelForAddress(sWalletAddress);
         if (sWalletLabel.isEmpty())
             sWalletLabel = tr("(no label)");
@@ -644,8 +640,10 @@ void CoinControlDialog::updateView()
 
         CAmount nSum = 0;
         int nChildren = 0;
-        for (const COutput& out : coins.second) {
-            nSum += out.tx->tx->vout[out.i].nValue;
+        for (const auto& outpair : coins.second) {
+            const COutPoint& output = std::get<0>(outpair);
+            const ipc::WalletTxOut& out = std::get<1>(outpair);
+            nSum += out.txout.nValue;
             nChildren++;
 
             CCoinControlWidgetItem *itemOutput;
@@ -657,7 +655,7 @@ void CoinControlDialog::updateView()
             // address
             CTxDestination outputAddress;
             QString sAddress = "";
-            if(ExtractDestination(out.tx->tx->vout[out.i].scriptPubKey, outputAddress))
+            if(ExtractDestination(out.txout.scriptPubKey, outputAddress))
             {
                 sAddress = QString::fromStdString(CBitcoinAddress(outputAddress).ToString());
 
@@ -682,35 +680,33 @@ void CoinControlDialog::updateView()
             }
 
             // amount
-            itemOutput->setText(COLUMN_AMOUNT, BitcoinUnits::format(nDisplayUnit, out.tx->tx->vout[out.i].nValue));
-            itemOutput->setData(COLUMN_AMOUNT, Qt::UserRole, QVariant((qlonglong)out.tx->tx->vout[out.i].nValue)); // padding so that sorting works correctly
+            itemOutput->setText(COLUMN_AMOUNT, BitcoinUnits::format(nDisplayUnit, out.txout.nValue));
+            itemOutput->setData(COLUMN_AMOUNT, Qt::UserRole, QVariant((qlonglong)out.txout.nValue)); // padding so that sorting works correctly
 
             // date
-            itemOutput->setText(COLUMN_DATE, GUIUtil::dateTimeStr(out.tx->GetTxTime()));
-            itemOutput->setData(COLUMN_DATE, Qt::UserRole, QVariant((qlonglong)out.tx->GetTxTime()));
+            itemOutput->setText(COLUMN_DATE, GUIUtil::dateTimeStr(out.time));
+            itemOutput->setData(COLUMN_DATE, Qt::UserRole, QVariant((qlonglong)out.time));
 
             // confirmations
-            itemOutput->setText(COLUMN_CONFIRMATIONS, QString::number(out.nDepth));
-            itemOutput->setData(COLUMN_CONFIRMATIONS, Qt::UserRole, QVariant((qlonglong)out.nDepth));
+            itemOutput->setText(COLUMN_CONFIRMATIONS, QString::number(out.depth_in_main_chain));
+            itemOutput->setData(COLUMN_CONFIRMATIONS, Qt::UserRole, QVariant((qlonglong)out.depth_in_main_chain));
 
             // transaction hash
-            uint256 txhash = out.tx->GetHash();
-            itemOutput->setText(COLUMN_TXHASH, QString::fromStdString(txhash.GetHex()));
+            itemOutput->setText(COLUMN_TXHASH, QString::fromStdString(output.hash.GetHex()));
 
             // vout index
-            itemOutput->setText(COLUMN_VOUT_INDEX, QString::number(out.i));
+            itemOutput->setText(COLUMN_VOUT_INDEX, QString::number(output.n));
 
              // disable locked coins
-            if (model->isLockedCoin(txhash, out.i))
+            if (model->getIpcWallet().isLockedCoin(output))
             {
-                COutPoint outpt(txhash, out.i);
-                coinControl->UnSelect(outpt); // just to be sure
+                coinControl->UnSelect(output); // just to be sure
                 itemOutput->setDisabled(true);
                 itemOutput->setIcon(COLUMN_CHECKBOX, platformStyle->SingleColorIcon(":/icons/lock_closed"));
             }
 
             // set checkbox
-            if (coinControl->IsSelected(COutPoint(txhash, out.i)))
+            if (coinControl->IsSelected(output))
                 itemOutput->setCheckState(COLUMN_CHECKBOX, Qt::Checked);
         }
 
diff --git a/src/qt/guiutil.cpp b/src/qt/guiutil.cpp
index f3c5daebec9..01389081402 100644
--- a/src/qt/guiutil.cpp
+++ b/src/qt/guiutil.cpp
@@ -12,6 +12,7 @@
 #include "fs.h"
 #include "primitives/transaction.h"
 #include "init.h"
+#include "ipc/interfaces.h"
 #include "policy/policy.h"
 #include "protocol.h"
 #include "script/script.h"
@@ -246,12 +247,12 @@ QString formatBitcoinURI(const SendCoinsRecipient &info)
     return ret;
 }
 
-bool isDust(const QString& address, const CAmount& amount)
+bool isDust(ipc::Node& ipc_node, const QString& address, const CAmount& amount)
 {
     CTxDestination dest = CBitcoinAddress(address.toStdString()).Get();
     CScript script = GetScriptForDestination(dest);
     CTxOut txOut(amount, script);
-    return IsDust(txOut, ::dustRelayFee);
+    return IsDust(txOut, ipc_node.getDustRelayFee());
 }
 
 QString HtmlEscape(const QString& str, bool fMultiLine)
diff --git a/src/qt/guiutil.h b/src/qt/guiutil.h
index d6aa8c4ea65..c20105ddc7c 100644
--- a/src/qt/guiutil.h
+++ b/src/qt/guiutil.h
@@ -20,6 +20,11 @@
 class QValidatedLineEdit;
 class SendCoinsRecipient;
 
+namespace ipc
+{
+    class Node;
+}
+
 QT_BEGIN_NAMESPACE
 class QAbstractItemView;
 class QDateTime;
@@ -50,7 +55,7 @@ namespace GUIUtil
     QString formatBitcoinURI(const SendCoinsRecipient &info);
 
     // Returns true if given address+amount meets "dust" definition
-    bool isDust(const QString& address, const CAmount& amount);
+    bool isDust(ipc::Node& ipc_node, const QString& address, const CAmount& amount);
 
     // HTML escaping for rich text controls
     QString HtmlEscape(const QString& str, bool fMultiLine=false);
diff --git a/src/qt/intro.cpp b/src/qt/intro.cpp
index 72809942f13..a891401475a 100644
--- a/src/qt/intro.cpp
+++ b/src/qt/intro.cpp
@@ -12,6 +12,7 @@
 
 #include "guiutil.h"
 
+#include "ipc/interfaces.h"
 #include "util.h"
 
 #include <QFileDialog>
@@ -186,7 +187,7 @@ QString Intro::getDefaultDataDirectory()
     return GUIUtil::boostPathToQString(GetDefaultDataDir());
 }
 
-bool Intro::pickDataDirectory()
+bool Intro::pickDataDirectory(ipc::Node& ipc_node)
 {
     QSettings settings;
     /* If data directory provided on command line, no need to look at settings
@@ -230,8 +231,9 @@ bool Intro::pickDataDirectory()
      * override -datadir in the bitcoin.conf file in the default data directory
      * (to be consistent with bitcoind behavior)
      */
-    if(dataDir != getDefaultDataDirectory())
-        gArgs.SoftSetArg("-datadir", GUIUtil::qstringToBoostPath(dataDir).string()); // use OS locale for path setting
+    if(dataDir != getDefaultDataDirectory()) {
+        ipc_node.softSetArg("-datadir", GUIUtil::qstringToBoostPath(dataDir).string()); // use OS locale for path setting
+    }
     return true;
 }
 
diff --git a/src/qt/intro.h b/src/qt/intro.h
index 5b428b379c4..a43f67eaef1 100644
--- a/src/qt/intro.h
+++ b/src/qt/intro.h
@@ -13,6 +13,10 @@ static const bool DEFAULT_CHOOSE_DATADIR = false;
 
 class FreespaceChecker;
 
+namespace ipc {
+    class Node;
+}
+
 namespace Ui {
     class Intro;
 }
@@ -41,7 +45,7 @@ class Intro : public QDialog
      * @note do NOT call global GetDataDir() before calling this function, this
      * will cause the wrong path to be cached.
      */
-    static bool pickDataDirectory();
+    static bool pickDataDirectory(ipc::Node& ipc_node);
 
     /**
      * Determine default data directory for operating system.
diff --git a/src/qt/optionsdialog.cpp b/src/qt/optionsdialog.cpp
index b80b6541ddd..8e39879b33b 100644
--- a/src/qt/optionsdialog.cpp
+++ b/src/qt/optionsdialog.cpp
@@ -13,14 +13,11 @@
 #include "guiutil.h"
 #include "optionsmodel.h"
 
+#include "ipc/interfaces.h"
 #include "validation.h" // for DEFAULT_SCRIPTCHECK_THREADS and MAX_SCRIPTCHECK_THREADS
 #include "netbase.h"
 #include "txdb.h" // for -dbcache defaults
 
-#ifdef ENABLE_WALLET
-#include "wallet/wallet.h" // for CWallet::GetRequiredFee()
-#endif
-
 #include <QDataWidgetMapper>
 #include <QDir>
 #include <QIntValidator>
@@ -315,17 +312,17 @@ void OptionsDialog::updateDefaultProxyNets()
     std::string strProxy;
     QString strDefaultProxyGUI;
 
-    GetProxy(NET_IPV4, proxy);
+    model->getIpcNode().getProxy(NET_IPV4, proxy);
     strProxy = proxy.proxy.ToStringIP() + ":" + proxy.proxy.ToStringPort();
     strDefaultProxyGUI = ui->proxyIp->text() + ":" + ui->proxyPort->text();
     (strProxy == strDefaultProxyGUI.toStdString()) ? ui->proxyReachIPv4->setChecked(true) : ui->proxyReachIPv4->setChecked(false);
 
-    GetProxy(NET_IPV6, proxy);
+    model->getIpcNode().getProxy(NET_IPV6, proxy);
     strProxy = proxy.proxy.ToStringIP() + ":" + proxy.proxy.ToStringPort();
     strDefaultProxyGUI = ui->proxyIp->text() + ":" + ui->proxyPort->text();
     (strProxy == strDefaultProxyGUI.toStdString()) ? ui->proxyReachIPv6->setChecked(true) : ui->proxyReachIPv6->setChecked(false);
 
-    GetProxy(NET_TOR, proxy);
+    model->getIpcNode().getProxy(NET_TOR, proxy);
     strProxy = proxy.proxy.ToStringIP() + ":" + proxy.proxy.ToStringPort();
     strDefaultProxyGUI = ui->proxyIp->text() + ":" + ui->proxyPort->text();
     (strProxy == strDefaultProxyGUI.toStdString()) ? ui->proxyReachTor->setChecked(true) : ui->proxyReachTor->setChecked(false);
diff --git a/src/qt/optionsmodel.cpp b/src/qt/optionsmodel.cpp
index 77efef3e3ca..b7ebd816dd7 100644
--- a/src/qt/optionsmodel.cpp
+++ b/src/qt/optionsmodel.cpp
@@ -13,23 +13,19 @@
 
 #include "amount.h"
 #include "init.h"
+#include "ipc/interfaces.h"
 #include "validation.h" // For DEFAULT_SCRIPTCHECK_THREADS
 #include "net.h"
 #include "netbase.h"
 #include "txdb.h" // for -dbcache defaults
 #include "intro.h" 
 
-#ifdef ENABLE_WALLET
-#include "wallet/wallet.h"
-#include "wallet/walletdb.h"
-#endif
-
 #include <QNetworkProxy>
 #include <QSettings>
 #include <QStringList>
 
-OptionsModel::OptionsModel(QObject *parent, bool resetSettings) :
-    QAbstractListModel(parent)
+OptionsModel::OptionsModel(ipc::Node& ipc_node, QObject *parent, bool resetSettings) :
+    QAbstractListModel(parent), m_ipc_node(ipc_node)
 {
     Init(resetSettings);
 }
@@ -92,12 +88,12 @@ void OptionsModel::Init(bool resetSettings)
     // Main
     if (!settings.contains("nDatabaseCache"))
         settings.setValue("nDatabaseCache", (qint64)nDefaultDbCache);
-    if (!gArgs.SoftSetArg("-dbcache", settings.value("nDatabaseCache").toString().toStdString()))
+    if (!m_ipc_node.softSetArg("-dbcache", settings.value("nDatabaseCache").toString().toStdString()))
         addOverriddenOption("-dbcache");
 
     if (!settings.contains("nThreadsScriptVerif"))
         settings.setValue("nThreadsScriptVerif", DEFAULT_SCRIPTCHECK_THREADS);
-    if (!gArgs.SoftSetArg("-par", settings.value("nThreadsScriptVerif").toString().toStdString()))
+    if (!m_ipc_node.softSetArg("-par", settings.value("nThreadsScriptVerif").toString().toStdString()))
         addOverriddenOption("-par");
 
     if (!settings.contains("strDataDir"))
@@ -107,19 +103,19 @@ void OptionsModel::Init(bool resetSettings)
 #ifdef ENABLE_WALLET
     if (!settings.contains("bSpendZeroConfChange"))
         settings.setValue("bSpendZeroConfChange", true);
-    if (!gArgs.SoftSetBoolArg("-spendzeroconfchange", settings.value("bSpendZeroConfChange").toBool()))
+    if (!m_ipc_node.softSetBoolArg("-spendzeroconfchange", settings.value("bSpendZeroConfChange").toBool()))
         addOverriddenOption("-spendzeroconfchange");
 #endif
 
     // Network
     if (!settings.contains("fUseUPnP"))
         settings.setValue("fUseUPnP", DEFAULT_UPNP);
-    if (!gArgs.SoftSetBoolArg("-upnp", settings.value("fUseUPnP").toBool()))
+    if (!m_ipc_node.softSetBoolArg("-upnp", settings.value("fUseUPnP").toBool()))
         addOverriddenOption("-upnp");
 
     if (!settings.contains("fListen"))
         settings.setValue("fListen", DEFAULT_LISTEN);
-    if (!gArgs.SoftSetBoolArg("-listen", settings.value("fListen").toBool()))
+    if (!m_ipc_node.softSetBoolArg("-listen", settings.value("fListen").toBool()))
         addOverriddenOption("-listen");
 
     if (!settings.contains("fUseProxy"))
@@ -127,7 +123,7 @@ void OptionsModel::Init(bool resetSettings)
     if (!settings.contains("addrProxy"))
         settings.setValue("addrProxy", "127.0.0.1:9050");
     // Only try to set -proxy, if user has enabled fUseProxy
-    if (settings.value("fUseProxy").toBool() && !gArgs.SoftSetArg("-proxy", settings.value("addrProxy").toString().toStdString()))
+    if (settings.value("fUseProxy").toBool() && !m_ipc_node.softSetArg("-proxy", settings.value("addrProxy").toString().toStdString()))
         addOverriddenOption("-proxy");
     else if(!settings.value("fUseProxy").toBool() && !gArgs.GetArg("-proxy", "").empty())
         addOverriddenOption("-proxy");
@@ -137,7 +133,7 @@ void OptionsModel::Init(bool resetSettings)
     if (!settings.contains("addrSeparateProxyTor"))
         settings.setValue("addrSeparateProxyTor", "127.0.0.1:9050");
     // Only try to set -onion, if user has enabled fUseSeparateProxyTor
-    if (settings.value("fUseSeparateProxyTor").toBool() && !gArgs.SoftSetArg("-onion", settings.value("addrSeparateProxyTor").toString().toStdString()))
+    if (settings.value("fUseSeparateProxyTor").toBool() && !m_ipc_node.softSetArg("-onion", settings.value("addrSeparateProxyTor").toString().toStdString()))
         addOverriddenOption("-onion");
     else if(!settings.value("fUseSeparateProxyTor").toBool() && !gArgs.GetArg("-onion", "").empty())
         addOverriddenOption("-onion");
@@ -145,7 +141,7 @@ void OptionsModel::Init(bool resetSettings)
     // Display
     if (!settings.contains("language"))
         settings.setValue("language", "");
-    if (!gArgs.SoftSetArg("-lang", settings.value("language").toString().toStdString()))
+    if (!m_ipc_node.softSetArg("-lang", settings.value("language").toString().toStdString()))
         addOverriddenOption("-lang");
 
     language = settings.value("language").toString();
@@ -277,7 +273,7 @@ bool OptionsModel::setData(const QModelIndex & index, const QVariant & value, in
             break;
         case MapPortUPnP: // core option - can be changed on-the-fly
             settings.setValue("fUseUPnP", value.toBool());
-            MapPort(value.toBool());
+            m_ipc_node.mapPort(value.toBool());
             break;
         case MinimizeOnClose:
             fMinimizeOnClose = value.toBool();
@@ -422,7 +418,7 @@ bool OptionsModel::getProxySettings(QNetworkProxy& proxy) const
     // Directly query current base proxy, because
     // GUI settings can be overridden with -proxy.
     proxyType curProxy;
-    if (GetProxy(NET_IPV4, curProxy)) {
+    if (m_ipc_node.getProxy(NET_IPV4, curProxy)) {
         proxy.setType(QNetworkProxy::Socks5Proxy);
         proxy.setHostName(QString::fromStdString(curProxy.proxy.ToStringIP()));
         proxy.setPort(curProxy.proxy.GetPort());
diff --git a/src/qt/optionsmodel.h b/src/qt/optionsmodel.h
index 78529fbdcc9..4ef1c8ff62e 100644
--- a/src/qt/optionsmodel.h
+++ b/src/qt/optionsmodel.h
@@ -9,6 +9,10 @@
 
 #include <QAbstractListModel>
 
+namespace ipc {
+class Node;
+}
+
 QT_BEGIN_NAMESPACE
 class QNetworkProxy;
 QT_END_NAMESPACE
@@ -24,7 +28,7 @@ class OptionsModel : public QAbstractListModel
     Q_OBJECT
 
 public:
-    explicit OptionsModel(QObject *parent = 0, bool resetSettings = false);
+    explicit OptionsModel(ipc::Node& ipc_node, QObject *parent = 0, bool resetSettings = false);
 
     enum OptionID {
         StartAtStartup,         // bool
@@ -72,7 +76,10 @@ class OptionsModel : public QAbstractListModel
     void setRestartRequired(bool fRequired);
     bool isRestartRequired();
 
+    ipc::Node& getIpcNode() const { return m_ipc_node; }
+
 private:
+    ipc::Node& m_ipc_node;
     /* Qt-only settings */
     bool fHideTrayIcon;
     bool fMinimizeToTray;
diff --git a/src/qt/overviewpage.cpp b/src/qt/overviewpage.cpp
index ba344f4dbf8..94d1f531d43 100644
--- a/src/qt/overviewpage.cpp
+++ b/src/qt/overviewpage.cpp
@@ -231,13 +231,15 @@ void OverviewPage::setWalletModel(WalletModel *model)
         ui->listTransactions->setModelColumn(TransactionTableModel::ToAddress);
 
         // Keep up to date with wallet
-        setBalance(model->getBalance(), model->getUnconfirmedBalance(), model->getImmatureBalance(),
-                   model->getWatchBalance(), model->getWatchUnconfirmedBalance(), model->getWatchImmatureBalance());
+        ipc::Wallet& ipc_wallet = model->getIpcWallet();
+        ipc::WalletBalances balances = ipc_wallet.getBalances();
+        setBalance(balances.balance, balances.unconfirmed_balance, balances.immature_balance,
+                   balances.watch_only_balance, balances.unconfirmed_watch_only_balance, balances.immature_watch_only_balance);
         connect(model, SIGNAL(balanceChanged(CAmount,CAmount,CAmount,CAmount,CAmount,CAmount)), this, SLOT(setBalance(CAmount,CAmount,CAmount,CAmount,CAmount,CAmount)));
 
         connect(model->getOptionsModel(), SIGNAL(displayUnitChanged(int)), this, SLOT(updateDisplayUnit()));
 
-        updateWatchOnlyLabels(model->haveWatchOnly());
+        updateWatchOnlyLabels(ipc_wallet.haveWatchOnly());
         connect(model, SIGNAL(notifyWatchonlyChanged(bool)), this, SLOT(updateWatchOnlyLabels(bool)));
     }
 
diff --git a/src/qt/paymentserver.cpp b/src/qt/paymentserver.cpp
index 67fe3201857..df3530ef32d 100644
--- a/src/qt/paymentserver.cpp
+++ b/src/qt/paymentserver.cpp
@@ -10,10 +10,12 @@
 
 #include "base58.h"
 #include "chainparams.h"
+#include "clientversion.h"
+#include "ipc/interfaces.h"
 #include "policy/policy.h"
 #include "ui_interface.h"
 #include "util.h"
-#include "wallet/wallet.h"
+#include "utilstrencodings.h"
 
 #include <cstdlib>
 
@@ -199,7 +201,7 @@ void PaymentServer::LoadRootCAs(X509_STORE* _store)
 // Warning: ipcSendCommandLine() is called early in init,
 // so don't use "Q_EMIT message()", but "QMessageBox::"!
 //
-void PaymentServer::ipcParseCommandLine(int argc, char* argv[])
+void PaymentServer::ipcParseCommandLine(ipc::Node& ipc_node, int argc, char* argv[])
 {
     for (int i = 1; i < argc; i++)
     {
@@ -223,12 +225,12 @@ void PaymentServer::ipcParseCommandLine(int argc, char* argv[])
 
                 if (address.IsValid(*tempChainParams))
                 {
-                    SelectParams(CBaseChainParams::MAIN);
+                    ipc_node.selectParams(CBaseChainParams::MAIN);
                 }
                 else {
                     tempChainParams = CreateChainParams(CBaseChainParams::TESTNET);
                     if (address.IsValid(*tempChainParams))
-                        SelectParams(CBaseChainParams::TESTNET);
+                        ipc_node.selectParams(CBaseChainParams::TESTNET);
                 }
             }
         }
@@ -241,11 +243,11 @@ void PaymentServer::ipcParseCommandLine(int argc, char* argv[])
             {
                 if (request.getDetails().network() == "main")
                 {
-                    SelectParams(CBaseChainParams::MAIN);
+                    ipc_node.selectParams(CBaseChainParams::MAIN);
                 }
                 else if (request.getDetails().network() == "test")
                 {
-                    SelectParams(CBaseChainParams::TESTNET);
+                    ipc_node.selectParams(CBaseChainParams::TESTNET);
                 }
             }
         }
@@ -525,7 +527,7 @@ bool PaymentServer::processPaymentRequest(const PaymentRequestPlus& request, Sen
 
     if (request.IsInitialized()) {
         // Payment request network matches client network?
-        if (!verifyNetwork(request.getDetails())) {
+        if (!verifyNetwork(optionsModel->getIpcNode(), request.getDetails())) {
             Q_EMIT message(tr("Payment request rejected"), tr("Payment request network doesn't match client network."),
                 CClientUIInterface::MSG_ERROR);
 
@@ -582,7 +584,7 @@ bool PaymentServer::processPaymentRequest(const PaymentRequestPlus& request, Sen
 
         // Extract and check amounts
         CTxOut txOut(sendingTo.second, sendingTo.first);
-        if (IsDust(txOut, ::dustRelayFee)) {
+        if (IsDust(txOut, optionsModel->getIpcNode().getDustRelayFee())) {
             Q_EMIT message(tr("Payment request error"), tr("Requested payment amount of %1 is too small (considered dust).")
                 .arg(BitcoinUnits::formatWithUnit(optionsModel->getDisplayUnit(), sendingTo.second)),
                 CClientUIInterface::MSG_ERROR);
@@ -620,7 +622,7 @@ void PaymentServer::fetchRequest(const QUrl& url)
     netManager->get(netRequest);
 }
 
-void PaymentServer::fetchPaymentACK(CWallet* wallet, SendCoinsRecipient recipient, QByteArray transaction)
+void PaymentServer::fetchPaymentACK(WalletModel* walletModel, SendCoinsRecipient recipient, QByteArray transaction)
 {
     const payments::PaymentDetails& details = recipient.paymentRequest.getDetails();
     if (!details.has_payment_url())
@@ -640,7 +642,7 @@ void PaymentServer::fetchPaymentACK(CWallet* wallet, SendCoinsRecipient recipien
     // Create a new refund address, or re-use:
     QString account = tr("Refund from %1").arg(recipient.authenticatedMerchant);
     std::string strAccount = account.toStdString();
-    std::set<CTxDestination> refundAddresses = wallet->GetAccountAddresses(strAccount);
+    std::set<CTxDestination> refundAddresses = walletModel->getIpcWallet().getAccountAddresses(strAccount);
     if (!refundAddresses.empty()) {
         CScript s = GetScriptForDestination(*refundAddresses.begin());
         payments::Output* refund_to = payment.add_refund_to();
@@ -648,9 +650,9 @@ void PaymentServer::fetchPaymentACK(CWallet* wallet, SendCoinsRecipient recipien
     }
     else {
         CPubKey newKey;
-        if (wallet->GetKeyFromPool(newKey)) {
+        if (walletModel->getIpcWallet().getKeyFromPool(newKey)) {
             CKeyID keyID = newKey.GetID();
-            wallet->SetAddressBook(keyID, strAccount, "refund");
+            walletModel->getIpcWallet().setAddressBook(keyID, strAccount, "refund");
 
             CScript s = GetScriptForDestination(keyID);
             payments::Output* refund_to = payment.add_refund_to();
@@ -760,14 +762,14 @@ void PaymentServer::handlePaymentACK(const QString& paymentACKMsg)
     Q_EMIT message(tr("Payment acknowledged"), paymentACKMsg, CClientUIInterface::ICON_INFORMATION | CClientUIInterface::MODAL);
 }
 
-bool PaymentServer::verifyNetwork(const payments::PaymentDetails& requestDetails)
+bool PaymentServer::verifyNetwork(ipc::Node& ipc_node, const payments::PaymentDetails& requestDetails)
 {
-    bool fVerified = requestDetails.network() == Params().NetworkIDString();
+    bool fVerified = requestDetails.network() == ipc_node.getNetwork();
     if (!fVerified) {
         qWarning() << QString("PaymentServer::%1: Payment request network \"%2\" doesn't match client network \"%3\".")
             .arg(__func__)
             .arg(QString::fromStdString(requestDetails.network()))
-            .arg(QString::fromStdString(Params().NetworkIDString()));
+            .arg(QString::fromStdString(ipc_node.getNetwork()));
     }
     return fVerified;
 }
diff --git a/src/qt/paymentserver.h b/src/qt/paymentserver.h
index 2fe6e3e7b1d..4e80c4b42bf 100644
--- a/src/qt/paymentserver.h
+++ b/src/qt/paymentserver.h
@@ -40,8 +40,6 @@
 
 class OptionsModel;
 
-class CWallet;
-
 QT_BEGIN_NAMESPACE
 class QApplication;
 class QByteArray;
@@ -62,7 +60,7 @@ class PaymentServer : public QObject
 public:
     // Parse URIs on command line
     // Returns false on error
-    static void ipcParseCommandLine(int argc, char *argv[]);
+    static void ipcParseCommandLine(ipc::Node& ipc_node, int argc, char *argv[]);
 
     // Returns true if there were URIs on the command line
     // which were successfully sent to an already-running
@@ -89,7 +87,7 @@ class PaymentServer : public QObject
     void setOptionsModel(OptionsModel *optionsModel);
 
     // Verify that the payment request network matches the client network
-    static bool verifyNetwork(const payments::PaymentDetails& requestDetails);
+    static bool verifyNetwork(ipc::Node& ipc_node, const payments::PaymentDetails& requestDetails);
     // Verify if the payment request is expired
     static bool verifyExpired(const payments::PaymentDetails& requestDetails);
     // Verify the payment request size is valid as per BIP70
@@ -113,7 +111,7 @@ public Q_SLOTS:
     void uiReady();
 
     // Submit Payment message to a merchant, get back PaymentACK:
-    void fetchPaymentACK(CWallet* wallet, SendCoinsRecipient recipient, QByteArray transaction);
+    void fetchPaymentACK(WalletModel* walletModel, SendCoinsRecipient recipient, QByteArray transaction);
 
     // Handle an incoming URI, URI with local file scheme or file
     void handleURIOrFile(const QString& s);
diff --git a/src/qt/peertablemodel.cpp b/src/qt/peertablemodel.cpp
index 42934f8055d..6df6c948e9e 100644
--- a/src/qt/peertablemodel.cpp
+++ b/src/qt/peertablemodel.cpp
@@ -8,6 +8,7 @@
 #include "guiconstants.h"
 #include "guiutil.h"
 
+#include "ipc/interfaces.h"
 #include "validation.h" // for cs_main
 #include "sync.h"
 
@@ -52,38 +53,26 @@ class PeerTablePriv
     std::map<NodeId, int> mapNodeRows;
 
     /** Pull a full list of peers from vNodes into our cache */
-    void refreshPeers()
+    void refreshPeers(ipc::Node& ipc_node)
     {
         {
             cachedNodeStats.clear();
-            std::vector<CNodeStats> vstats;
-            if(g_connman)
-                g_connman->GetNodeStats(vstats);
+
+            ipc::Node::NodesStats nodes;
+            ipc_node.getNodesStats(nodes);
 #if QT_VERSION >= 0x040700
-            cachedNodeStats.reserve(vstats.size());
+            cachedNodeStats.reserve(nodes.size());
 #endif
-            for (const CNodeStats& nodestats : vstats)
+            for (auto& node : nodes)
             {
                 CNodeCombinedStats stats;
-                stats.nodeStateStats.nMisbehavior = 0;
-                stats.nodeStateStats.nSyncHeight = -1;
-                stats.nodeStateStats.nCommonHeight = -1;
-                stats.fNodeStateStatsAvailable = false;
-                stats.nodeStats = nodestats;
+                stats.nodeStats = std::get<0>(node);
+                stats.fNodeStateStatsAvailable = std::get<1>(node);
+                stats.nodeStateStats = std::get<2>(node);
                 cachedNodeStats.append(stats);
             }
         }
 
-        // Try to retrieve the CNodeStateStats for each node.
-        {
-            TRY_LOCK(cs_main, lockMain);
-            if (lockMain)
-            {
-                for (CNodeCombinedStats &stats : cachedNodeStats)
-                    stats.fNodeStateStatsAvailable = GetNodeStateStats(stats.nodeStats.nodeid, stats.nodeStateStats);
-            }
-        }
-
         if (sortColumn >= 0)
             // sort cacheNodeStats (use stable sort to prevent rows jumping around unnecessarily)
             qStableSort(cachedNodeStats.begin(), cachedNodeStats.end(), NodeLessThan(sortColumn, sortOrder));
@@ -109,8 +98,9 @@ class PeerTablePriv
     }
 };
 
-PeerTableModel::PeerTableModel(ClientModel *parent) :
+PeerTableModel::PeerTableModel(ipc::Node& ipc_node, ClientModel *parent) :
     QAbstractTableModel(parent),
+    m_ipc_node(ipc_node),
     clientModel(parent),
     timer(0)
 {
@@ -221,7 +211,7 @@ const CNodeCombinedStats *PeerTableModel::getNodeStats(int idx)
 void PeerTableModel::refresh()
 {
     Q_EMIT layoutAboutToBeChanged();
-    priv->refreshPeers();
+    priv->refreshPeers(m_ipc_node);
     Q_EMIT layoutChanged();
 }
 
diff --git a/src/qt/peertablemodel.h b/src/qt/peertablemodel.h
index cc47b67ec9b..4a279de1a18 100644
--- a/src/qt/peertablemodel.h
+++ b/src/qt/peertablemodel.h
@@ -14,6 +14,10 @@
 class ClientModel;
 class PeerTablePriv;
 
+namespace ipc {
+class Node;
+}
+
 QT_BEGIN_NAMESPACE
 class QTimer;
 QT_END_NAMESPACE
@@ -45,7 +49,7 @@ class PeerTableModel : public QAbstractTableModel
     Q_OBJECT
 
 public:
-    explicit PeerTableModel(ClientModel *parent = 0);
+    explicit PeerTableModel(ipc::Node& ipc_node, ClientModel *parent = 0);
     ~PeerTableModel();
     const CNodeCombinedStats *getNodeStats(int idx);
     int getRowByNodeId(NodeId nodeid);
@@ -74,6 +78,7 @@ public Q_SLOTS:
     void refresh();
 
 private:
+    ipc::Node& m_ipc_node;
     ClientModel *clientModel;
     QStringList columns;
     std::unique_ptr<PeerTablePriv> priv;
diff --git a/src/qt/recentrequeststablemodel.cpp b/src/qt/recentrequeststablemodel.cpp
index 1c4f7aca863..2fd3e413881 100644
--- a/src/qt/recentrequeststablemodel.cpp
+++ b/src/qt/recentrequeststablemodel.cpp
@@ -12,10 +12,9 @@
 #include "streams.h"
 
 
-RecentRequestsTableModel::RecentRequestsTableModel(CWallet *wallet, WalletModel *parent) :
+RecentRequestsTableModel::RecentRequestsTableModel(WalletModel *parent) :
     QAbstractTableModel(parent), walletModel(parent)
 {
-    Q_UNUSED(wallet);
     nReceiveRequestsMaxId = 0;
 
     // Load entries from wallet
diff --git a/src/qt/recentrequeststablemodel.h b/src/qt/recentrequeststablemodel.h
index 0c02968f928..680bc79c52e 100644
--- a/src/qt/recentrequeststablemodel.h
+++ b/src/qt/recentrequeststablemodel.h
@@ -11,8 +11,6 @@
 #include <QStringList>
 #include <QDateTime>
 
-class CWallet;
-
 class RecentRequestEntry
 {
 public:
@@ -60,7 +58,7 @@ class RecentRequestsTableModel: public QAbstractTableModel
     Q_OBJECT
 
 public:
-    explicit RecentRequestsTableModel(CWallet *wallet, WalletModel *parent);
+    explicit RecentRequestsTableModel(WalletModel *parent);
     ~RecentRequestsTableModel();
 
     enum ColumnIndex {
diff --git a/src/qt/rpcconsole.cpp b/src/qt/rpcconsole.cpp
index 3590a98efac..abdff4ce5aa 100644
--- a/src/qt/rpcconsole.cpp
+++ b/src/qt/rpcconsole.cpp
@@ -14,7 +14,9 @@
 #include "guiutil.h"
 #include "platformstyle.h"
 #include "chainparams.h"
+#include "ipc/interfaces.h"
 #include "netbase.h"
+#include "ipc/interfaces.h"
 #include "rpc/server.h"
 #include "rpc/client.h"
 #include "util.h"
@@ -82,12 +84,17 @@ const QStringList historyFilter = QStringList()
 class RPCExecutor : public QObject
 {
     Q_OBJECT
+public:
+    RPCExecutor(ipc::Node& ipc_node) : m_ipc_node(ipc_node) {}
 
 public Q_SLOTS:
     void request(const QString &command);
 
 Q_SIGNALS:
     void reply(int category, const QString &command);
+
+private:
+    ipc::Node& m_ipc_node;
 };
 
 /** Class for handling RPC timers
@@ -139,13 +146,14 @@ class QtRPCTimerInterface: public RPCTimerInterface
  *   - Within double quotes, only escape \c " and backslashes before a \c " or another backslash
  *   - Within single quotes, no escaping is possible and no special interpretation takes place
  *
+ * @param[in]    ipc_node    optional node to execute command on
  * @param[out]   result      stringified Result from the executed command(chain)
  * @param[in]    strCommand  Command line to split
  * @param[in]    fExecute    set true if you want the command to be executed
  * @param[out]   pstrFilteredOut  Command line, filtered to remove any sensitive data
  */
 
-bool RPCConsole::RPCParseCommandLine(std::string &strResult, const std::string &strCommand, const bool fExecute, std::string * const pstrFilteredOut)
+bool RPCConsole::RPCParseCommandLine(ipc::Node* ipc_node, std::string &strResult, const std::string &strCommand, const bool fExecute, std::string * const pstrFilteredOut)
 {
     std::vector< std::vector<std::string> > stack;
     stack.push_back(std::vector<std::string>());
@@ -299,18 +307,16 @@ bool RPCConsole::RPCParseCommandLine(std::string &strResult, const std::string &
                         if (fExecute) {
                             // Convert argument list to JSON objects in method-dependent way,
                             // and pass it along with the method name to the dispatcher.
-                            JSONRPCRequest req;
-                            req.params = RPCConvertValues(stack.back()[0], std::vector<std::string>(stack.back().begin() + 1, stack.back().end()));
-                            req.strMethod = stack.back()[0];
+                            std::string uri;
 #ifdef ENABLE_WALLET
                             // TODO: Move this logic to WalletModel
                             if (!vpwallets.empty()) {
                                 // in Qt, use always the wallet with index 0 when running with multiple wallets
                                 QByteArray encodedName = QUrl::toPercentEncoding(QString::fromStdString(vpwallets[0]->GetName()));
-                                req.URI = "/wallet/"+std::string(encodedName.constData(), encodedName.length());
+                                uri = "/wallet/"+std::string(encodedName.constData(), encodedName.length());
                             }
 #endif
-                            lastResult = tableRPC.execute(req);
+                            lastResult = ipc_node->executeRpc(stack.back()[0],RPCConvertValues(stack.back()[0], std::vector<std::string>(stack.back().begin() + 1, stack.back().end())), uri);
                         }
 
                         state = STATE_COMMAND_EXECUTED;
@@ -391,7 +397,7 @@ void RPCExecutor::request(const QString &command)
     {
         std::string result;
         std::string executableCommand = command.toStdString() + "\n";
-        if(!RPCConsole::RPCExecuteCommandLine(result, executableCommand))
+        if(!RPCConsole::RPCExecuteCommandLine(m_ipc_node, result, executableCommand))
         {
             Q_EMIT reply(RPCConsole::CMD_ERROR, QString("Parse error: unbalanced ' or \""));
             return;
@@ -417,8 +423,9 @@ void RPCExecutor::request(const QString &command)
     }
 }
 
-RPCConsole::RPCConsole(const PlatformStyle *_platformStyle, QWidget *parent) :
+RPCConsole::RPCConsole(ipc::Node& ipc_node, const PlatformStyle *_platformStyle, QWidget *parent) :
     QWidget(parent),
+    m_ipc_node(ipc_node),
     ui(new Ui::RPCConsole),
     clientModel(0),
     historyPtr(0),
@@ -459,7 +466,7 @@ RPCConsole::RPCConsole(const PlatformStyle *_platformStyle, QWidget *parent) :
     rpcTimerInterface = new QtRPCTimerInterface();
     // avoid accidentally overwriting an existing, non QTThread
     // based timer interface
-    RPCSetTimerInterfaceIfUnset(rpcTimerInterface);
+    m_ipc_node.rpcSetTimerInterfaceIfUnset(rpcTimerInterface);
 
     setTrafficGraphRange(INITIAL_TRAFFIC_GRAPH_MINS);
 
@@ -474,7 +481,7 @@ RPCConsole::RPCConsole(const PlatformStyle *_platformStyle, QWidget *parent) :
 RPCConsole::~RPCConsole()
 {
     GUIUtil::saveWindowGeometry("nRPCConsoleWindow", this);
-    RPCUnsetTimerInterface(rpcTimerInterface);
+    m_ipc_node.rpcUnsetTimerInterface(rpcTimerInterface);
     delete rpcTimerInterface;
     delete ui;
 }
@@ -532,13 +539,14 @@ void RPCConsole::setClientModel(ClientModel *model)
         setNumConnections(model->getNumConnections());
         connect(model, SIGNAL(numConnectionsChanged(int)), this, SLOT(setNumConnections(int)));
 
-        setNumBlocks(model->getNumBlocks(), model->getLastBlockDate(), model->getVerificationProgress(nullptr), false);
+        ipc::Node& ipc_node = clientModel->getIpcNode();
+        setNumBlocks(ipc_node.getNumBlocks(), QDateTime::fromTime_t(ipc_node.getLastBlockTime()), ipc_node.getVerificationProgress(), false);
         connect(model, SIGNAL(numBlocksChanged(int,QDateTime,double,bool)), this, SLOT(setNumBlocks(int,QDateTime,double,bool)));
 
         updateNetworkState();
         connect(model, SIGNAL(networkActiveChanged(bool)), this, SLOT(setNetworkActive(bool)));
 
-        updateTrafficStats(model->getTotalBytesRecv(), model->getTotalBytesSent());
+        updateTrafficStats(ipc_node.getTotalBytesRecv(), ipc_node.getTotalBytesSent());
         connect(model, SIGNAL(bytesChanged(quint64,quint64)), this, SLOT(updateTrafficStats(quint64, quint64)));
 
         connect(model, SIGNAL(mempoolSizeChanged(long,size_t)), this, SLOT(setMempoolSize(long,size_t)));
@@ -633,7 +641,7 @@ void RPCConsole::setClientModel(ClientModel *model)
 
         //Setup autocomplete and attach it
         QStringList wordList;
-        std::vector<std::string> commandList = tableRPC.listCommands();
+        std::vector<std::string> commandList = m_ipc_node.listRpcCommands();
         for (size_t i = 0; i < commandList.size(); ++i)
         {
             wordList << commandList[i].c_str();
@@ -782,7 +790,7 @@ void RPCConsole::updateNetworkState()
     connections += tr("In:") + " " + QString::number(clientModel->getNumConnections(CONNECTIONS_IN)) + " / ";
     connections += tr("Out:") + " " + QString::number(clientModel->getNumConnections(CONNECTIONS_OUT)) + ")";
 
-    if(!clientModel->getNetworkActive()) {
+    if(!clientModel->getIpcNode().getNetworkActive()) {
         connections += " (" + tr("Network activity disabled") + ")";
     }
 
@@ -829,7 +837,7 @@ void RPCConsole::on_lineEdit_returnPressed()
         std::string strFilteredCmd;
         try {
             std::string dummy;
-            if (!RPCParseCommandLine(dummy, cmd.toStdString(), false, &strFilteredCmd)) {
+            if (!RPCParseCommandLine(nullptr, dummy, cmd.toStdString(), false, &strFilteredCmd)) {
                 // Failed to parse command, so we cannot even filter it for the history
                 throw std::runtime_error("Invalid command line");
             }
@@ -885,7 +893,7 @@ void RPCConsole::browseHistory(int offset)
 
 void RPCConsole::startExecutor()
 {
-    RPCExecutor *executor = new RPCExecutor();
+    RPCExecutor *executor = new RPCExecutor(m_ipc_node);
     executor->moveToThread(&thread);
 
     // Replies from executor object must go to this object
@@ -1123,9 +1131,6 @@ void RPCConsole::showBanTableContextMenu(const QPoint& point)
 
 void RPCConsole::disconnectSelectedNode()
 {
-    if(!g_connman)
-        return;
-    
     // Get selected peer addresses
     QList<QModelIndex> nodes = GUIUtil::getEntryData(ui->peerWidget, PeerTableModel::NetNodeId);
     for(int i = 0; i < nodes.count(); i++)
@@ -1133,14 +1138,14 @@ void RPCConsole::disconnectSelectedNode()
         // Get currently selected peer address
         NodeId id = nodes.at(i).data().toLongLong();
         // Find the node, disconnect it and clear the selected node
-        if(g_connman->DisconnectNode(id))
+        if(m_ipc_node.disconnect(id))
             clearSelectedNode();
     }
 }
 
 void RPCConsole::banSelectedNode(int bantime)
 {
-    if (!clientModel || !g_connman)
+    if (!clientModel)
         return;
     
     // Get selected peer addresses
@@ -1158,7 +1163,7 @@ void RPCConsole::banSelectedNode(int bantime)
 	// Find possible nodes, ban it and clear the selected node
 	const CNodeCombinedStats *stats = clientModel->getPeerTableModel()->getNodeStats(detailNodeRow);
 	if(stats) {
-	    g_connman->Ban(stats->nodeStats.addr, BanReasonManuallyAdded, bantime);
+	    m_ipc_node.ban(stats->nodeStats.addr, BanReasonManuallyAdded, bantime);
 	}
     }
     clearSelectedNode();
@@ -1179,9 +1184,8 @@ void RPCConsole::unbanSelectedNode()
         CSubNet possibleSubnet;
 
         LookupSubNet(strNode.toStdString().c_str(), possibleSubnet);
-        if (possibleSubnet.IsValid() && g_connman)
+        if (possibleSubnet.IsValid() && m_ipc_node.unban(possibleSubnet))
         {
-            g_connman->Unban(possibleSubnet);
             clientModel->getBanTableModel()->refresh();
         }
     }
diff --git a/src/qt/rpcconsole.h b/src/qt/rpcconsole.h
index da06818f877..01d5f0ff6b2 100644
--- a/src/qt/rpcconsole.h
+++ b/src/qt/rpcconsole.h
@@ -18,6 +18,10 @@ class ClientModel;
 class PlatformStyle;
 class RPCTimerInterface;
 
+namespace ipc {
+    class Node;
+}
+
 namespace Ui {
     class RPCConsole;
 }
@@ -33,12 +37,12 @@ class RPCConsole: public QWidget
     Q_OBJECT
 
 public:
-    explicit RPCConsole(const PlatformStyle *platformStyle, QWidget *parent);
+    explicit RPCConsole(ipc::Node& ipc_node, const PlatformStyle *platformStyle, QWidget *parent);
     ~RPCConsole();
 
-    static bool RPCParseCommandLine(std::string &strResult, const std::string &strCommand, bool fExecute, std::string * const pstrFilteredOut = nullptr);
-    static bool RPCExecuteCommandLine(std::string &strResult, const std::string &strCommand, std::string * const pstrFilteredOut = nullptr) {
-        return RPCParseCommandLine(strResult, strCommand, true, pstrFilteredOut);
+    static bool RPCParseCommandLine(ipc::Node* ipc_node, std::string &strResult, const std::string &strCommand, bool fExecute, std::string * const pstrFilteredOut = nullptr);
+    static bool RPCExecuteCommandLine(ipc::Node& ipc_node, std::string &strResult, const std::string &strCommand, std::string * const pstrFilteredOut = nullptr) {
+        return RPCParseCommandLine(&ipc_node, strResult, strCommand, true, pstrFilteredOut);
     }
 
     void setClientModel(ClientModel *model);
@@ -139,6 +143,7 @@ public Q_SLOTS:
 
     };
 
+    ipc::Node& m_ipc_node;
     Ui::RPCConsole *ui;
     ClientModel *clientModel;
     QStringList history;
diff --git a/src/qt/sendcoinsdialog.cpp b/src/qt/sendcoinsdialog.cpp
index a01886c3ea8..cae4e6244a0 100644
--- a/src/qt/sendcoinsdialog.cpp
+++ b/src/qt/sendcoinsdialog.cpp
@@ -18,10 +18,8 @@
 #include "base58.h"
 #include "chainparams.h"
 #include "wallet/coincontrol.h"
-#include "validation.h" // mempool and minRelayTxFee
 #include "ui_interface.h"
 #include "txmempool.h"
-#include "policy/fees.h"
 #include "wallet/wallet.h"
 
 #include <QFontMetrics>
@@ -158,8 +156,9 @@ void SendCoinsDialog::setModel(WalletModel *_model)
             }
         }
 
-        setBalance(_model->getBalance(), _model->getUnconfirmedBalance(), _model->getImmatureBalance(),
-                   _model->getWatchBalance(), _model->getWatchUnconfirmedBalance(), _model->getWatchImmatureBalance());
+        ipc::WalletBalances balances = _model->getIpcWallet().getBalances();
+        setBalance(balances.balance, balances.unconfirmed_balance, balances.immature_balance,
+                   balances.watch_only_balance, balances.unconfirmed_watch_only_balance, balances.immature_watch_only_balance);
         connect(_model, SIGNAL(balanceChanged(CAmount,CAmount,CAmount,CAmount,CAmount,CAmount)), this, SLOT(setBalance(CAmount,CAmount,CAmount,CAmount,CAmount,CAmount)));
         connect(_model->getOptionsModel(), SIGNAL(displayUnitChanged(int)), this, SLOT(updateDisplayUnit()));
         updateDisplayUnit();
@@ -185,13 +184,13 @@ void SendCoinsDialog::setModel(WalletModel *_model)
         connect(ui->checkBoxMinimumFee, SIGNAL(stateChanged(int)), this, SLOT(coinControlUpdateLabels()));
         connect(ui->optInRBF, SIGNAL(stateChanged(int)), this, SLOT(updateSmartFeeLabel()));
         connect(ui->optInRBF, SIGNAL(stateChanged(int)), this, SLOT(coinControlUpdateLabels()));
-        ui->customFee->setSingleStep(CWallet::GetRequiredFee(1000));
+        ui->customFee->setSingleStep(model->getIpcNode().getRequiredFee(1000));
         updateFeeSectionControls();
         updateMinFeeLabel();
         updateSmartFeeLabel();
 
         // set default rbf checkbox state
-        ui->optInRBF->setCheckState(model->getDefaultWalletRbf() ? Qt::Checked : Qt::Unchecked);
+        ui->optInRBF->setCheckState(model->getIpcNode().getWalletRbf() ? Qt::Checked : Qt::Unchecked);
 
         // set the smartfee-sliders default value (wallets default conf.target or last stored value)
         QSettings settings;
@@ -203,7 +202,7 @@ void SendCoinsDialog::setModel(WalletModel *_model)
             settings.remove("nSmartFeeSliderPosition");
         }
         if (settings.value("nConfTarget").toInt() == 0)
-            ui->confTargetSelector->setCurrentIndex(getIndexForConfTarget(model->getDefaultConfirmTarget()));
+            ui->confTargetSelector->setCurrentIndex(getIndexForConfTarget(model->getIpcNode().getTxConfirmTarget()));
         else
             ui->confTargetSelector->setCurrentIndex(getIndexForConfTarget(settings.value("nConfTarget").toInt()));
     }
@@ -235,7 +234,7 @@ void SendCoinsDialog::on_sendButton_clicked()
         SendCoinsEntry *entry = qobject_cast<SendCoinsEntry*>(ui->entries->itemAt(i)->widget());
         if(entry)
         {
-            if(entry->validate())
+            if(entry->validate(model->getIpcNode()))
             {
                 recipients.append(entry->getValue());
             }
@@ -530,7 +529,7 @@ void SendCoinsDialog::setBalance(const CAmount& balance, const CAmount& unconfir
 
 void SendCoinsDialog::updateDisplayUnit()
 {
-    setBalance(model->getBalance(), 0, 0, 0, 0, 0);
+    setBalance(model->getIpcWallet().getBalance(), 0, 0, 0, 0, 0);
     ui->customFee->setDisplayUnit(model->getOptionsModel()->getDisplayUnit());
     updateMinFeeLabel();
     updateSmartFeeLabel();
@@ -571,7 +570,7 @@ void SendCoinsDialog::processSendCoinsReturn(const WalletModel::SendCoinsReturn
         msgParams.second = CClientUIInterface::MSG_ERROR;
         break;
     case WalletModel::AbsurdFee:
-        msgParams.first = tr("A fee higher than %1 is considered an absurdly high fee.").arg(BitcoinUnits::formatWithUnit(model->getOptionsModel()->getDisplayUnit(), maxTxFee));
+        msgParams.first = tr("A fee higher than %1 is considered an absurdly high fee.").arg(BitcoinUnits::formatWithUnit(model->getOptionsModel()->getDisplayUnit(), model->getIpcNode().getMaxTxFee()));
         break;
     case WalletModel::PaymentRequestExpired:
         msgParams.first = tr("Payment request expired.");
@@ -610,7 +609,7 @@ void SendCoinsDialog::on_buttonMinimizeFee_clicked()
 void SendCoinsDialog::setMinimumFee()
 {
     ui->radioCustomPerKilobyte->setChecked(true);
-    ui->customFee->setValue(CWallet::GetRequiredFee(1000));
+    ui->customFee->setValue(model->getIpcNode().getRequiredFee(1000));
 }
 
 void SendCoinsDialog::updateFeeSectionControls()
@@ -643,7 +642,7 @@ void SendCoinsDialog::updateMinFeeLabel()
 {
     if (model && model->getOptionsModel())
         ui->checkBoxMinimumFee->setText(tr("Pay only the required fee of %1").arg(
-            BitcoinUnits::formatWithUnit(model->getOptionsModel()->getDisplayUnit(), CWallet::GetRequiredFee(1000)) + "/kB")
+            BitcoinUnits::formatWithUnit(model->getOptionsModel()->getDisplayUnit(), model->getIpcNode().getRequiredFee(1000)) + "/kB")
         );
 }
 
@@ -667,12 +666,13 @@ void SendCoinsDialog::updateSmartFeeLabel()
     CCoinControl coin_control;
     updateCoinControlState(coin_control);
     coin_control.m_feerate.reset(); // Explicitly use only fee estimation rate for smart fee labels
-    FeeCalculation feeCalc;
-    CFeeRate feeRate = CFeeRate(CWallet::GetMinimumFee(1000, coin_control, ::mempool, ::feeEstimator, &feeCalc));
+    int returned_target;
+    FeeReason reason;
+    CFeeRate feeRate = CFeeRate(model->getIpcNode().getMinimumFee(1000, coin_control, &returned_target, &reason));
 
     ui->labelSmartFee->setText(BitcoinUnits::formatWithUnit(model->getOptionsModel()->getDisplayUnit(), feeRate.GetFeePerK()) + "/kB");
 
-    if (feeCalc.reason == FeeReason::FALLBACK) {
+    if (reason == FeeReason::FALLBACK) {
         ui->labelSmartFee2->show(); // (Smart fee not initialized yet. This usually takes a few blocks...)
         ui->labelFeeEstimation->setText("");
         ui->fallbackFeeWarningLabel->setVisible(true);
@@ -684,7 +684,7 @@ void SendCoinsDialog::updateSmartFeeLabel()
     else
     {
         ui->labelSmartFee2->hide();
-        ui->labelFeeEstimation->setText(tr("Estimated to begin confirmation within %n block(s).", "", feeCalc.returnedTarget));
+        ui->labelFeeEstimation->setText(tr("Estimated to begin confirmation within %n block(s).", "", returned_target));
         ui->fallbackFeeWarningLabel->setVisible(false);
     }
 
@@ -791,7 +791,7 @@ void SendCoinsDialog::coinControlChangeEdited(const QString& text)
         {
             CKeyID keyid;
             addr.GetKeyID(keyid);
-            if (!model->havePrivKey(keyid)) // Unknown change address
+            if (!model->getIpcWallet().havePrivKey(keyid)) // Unknown change address
             {
                 ui->labelCoinControlChangeLabel->setText(tr("Warning: Unknown change address"));
 
diff --git a/src/qt/sendcoinsentry.cpp b/src/qt/sendcoinsentry.cpp
index bb0f47b21c0..2a960dd2da8 100644
--- a/src/qt/sendcoinsentry.cpp
+++ b/src/qt/sendcoinsentry.cpp
@@ -117,7 +117,7 @@ void SendCoinsEntry::deleteClicked()
     Q_EMIT removeEntry(this);
 }
 
-bool SendCoinsEntry::validate()
+bool SendCoinsEntry::validate(ipc::Node& ipc_node)
 {
     if (!model)
         return false;
@@ -148,7 +148,7 @@ bool SendCoinsEntry::validate()
     }
 
     // Reject dust outputs:
-    if (retval && GUIUtil::isDust(ui->payTo->text(), ui->payAmount->value())) {
+    if (retval && GUIUtil::isDust(ipc_node, ui->payTo->text(), ui->payAmount->value())) {
         ui->payAmount->setValid(false);
         retval = false;
     }
diff --git a/src/qt/sendcoinsentry.h b/src/qt/sendcoinsentry.h
index a8be670c2aa..265e5d4f73a 100644
--- a/src/qt/sendcoinsentry.h
+++ b/src/qt/sendcoinsentry.h
@@ -30,7 +30,7 @@ class SendCoinsEntry : public QStackedWidget
     ~SendCoinsEntry();
 
     void setModel(WalletModel *model);
-    bool validate();
+    bool validate(ipc::Node& ipc_node);
     SendCoinsRecipient getValue();
 
     /** Return whether the entry is still empty and unedited */
diff --git a/src/qt/signverifymessagedialog.cpp b/src/qt/signverifymessagedialog.cpp
index 0950ed02342..9b55f522273 100644
--- a/src/qt/signverifymessagedialog.cpp
+++ b/src/qt/signverifymessagedialog.cpp
@@ -142,7 +142,7 @@ void SignVerifyMessageDialog::on_signMessageButton_SM_clicked()
     }
 
     CKey key;
-    if (!model->getPrivKey(keyID, key))
+    if (!model->getIpcWallet().getPrivKey(keyID, key))
     {
         ui->statusLabel_SM->setStyleSheet("QLabel { color: red; }");
         ui->statusLabel_SM->setText(tr("Private key for the entered address is not available."));
diff --git a/src/qt/splashscreen.cpp b/src/qt/splashscreen.cpp
index 1b7cc69231c..44b609b6354 100644
--- a/src/qt/splashscreen.cpp
+++ b/src/qt/splashscreen.cpp
@@ -12,22 +12,19 @@
 
 #include "clientversion.h"
 #include "init.h"
+#include "ipc/interfaces.h"
 #include "util.h"
 #include "ui_interface.h"
 #include "version.h"
 
-#ifdef ENABLE_WALLET
-#include "wallet/wallet.h"
-#endif
-
 #include <QApplication>
 #include <QCloseEvent>
 #include <QDesktopWidget>
 #include <QPainter>
 #include <QRadialGradient>
 
-SplashScreen::SplashScreen(Qt::WindowFlags f, const NetworkStyle *networkStyle) :
-    QWidget(0, f), curAlignment(0)
+SplashScreen::SplashScreen(ipc::Node& ipc_node, Qt::WindowFlags f, const NetworkStyle *networkStyle) :
+    QWidget(0, f), curAlignment(0), m_ipc_node(ipc_node)
 {
     // set reference point, paddings
     int paddingRight            = 50;
@@ -142,8 +139,8 @@ SplashScreen::~SplashScreen()
 bool SplashScreen::eventFilter(QObject * obj, QEvent * ev) {
     if (ev->type() == QEvent::KeyPress) {
         QKeyEvent *keyEvent = static_cast<QKeyEvent *>(ev);
-        if(keyEvent->text()[0] == 'q' && breakAction != nullptr) {
-            breakAction();
+        if(keyEvent->text()[0] == 'q') {
+            m_ipc_node.interruptInit();
         }
     }
     return QObject::eventFilter(obj, ev);
@@ -175,47 +172,34 @@ static void ShowProgress(SplashScreen *splash, const std::string &title, int nPr
     InitMessage(splash, title + strprintf("%d", nProgress) + "%");
 }
 
-void SplashScreen::setBreakAction(const std::function<void(void)> &action)
-{
-    breakAction = action;
-}
-
-static void SetProgressBreakAction(SplashScreen *splash, const std::function<void(void)> &action)
-{
-    QMetaObject::invokeMethod(splash, "setBreakAction",
-        Qt::QueuedConnection,
-        Q_ARG(std::function<void(void)>, action));
-}
-
 #ifdef ENABLE_WALLET
-void SplashScreen::ConnectWallet(CWallet* wallet)
+void SplashScreen::ConnectWallet(std::unique_ptr<ipc::Wallet> wallet)
 {
-    wallet->ShowProgress.connect(boost::bind(ShowProgress, this, _1, _2));
-    connectedWallets.push_back(wallet);
+    m_connected_wallet_handlers.emplace_back(wallet->handleShowProgress(boost::bind(ShowProgress, this, _1, _2)));
+    m_connected_wallets.emplace_back(std::move(wallet));
 }
 #endif
 
 void SplashScreen::subscribeToCoreSignals()
 {
     // Connect signals to client
-    uiInterface.InitMessage.connect(boost::bind(InitMessage, this, _1));
-    uiInterface.ShowProgress.connect(boost::bind(ShowProgress, this, _1, _2));
-    uiInterface.SetProgressBreakAction.connect(boost::bind(SetProgressBreakAction, this, _1));
+    m_handler_init_message = m_ipc_node.handleInitMessage(boost::bind(InitMessage, this, _1));
+    m_handler_show_progress = m_ipc_node.handleShowProgress(boost::bind(ShowProgress, this, _1, _2));
 #ifdef ENABLE_WALLET
-    uiInterface.LoadWallet.connect(boost::bind(&SplashScreen::ConnectWallet, this, _1));
+    m_handler_load_wallet = m_ipc_node.handleLoadWallet([this](std::unique_ptr<ipc::Wallet> wallet) { ConnectWallet(std::move(wallet)); });
 #endif
 }
 
 void SplashScreen::unsubscribeFromCoreSignals()
 {
     // Disconnect signals from client
-    uiInterface.InitMessage.disconnect(boost::bind(InitMessage, this, _1));
-    uiInterface.ShowProgress.disconnect(boost::bind(ShowProgress, this, _1, _2));
-#ifdef ENABLE_WALLET
-    for (CWallet* const & pwallet : connectedWallets) {
-        pwallet->ShowProgress.disconnect(boost::bind(ShowProgress, this, _1, _2));
+    m_handler_init_message->disconnect();
+    m_handler_show_progress->disconnect();
+    for (auto& handler : m_connected_wallet_handlers) {
+        handler->disconnect();
     }
-#endif
+    m_connected_wallet_handlers.clear();
+    m_connected_wallets.clear();
 }
 
 void SplashScreen::showMessage(const QString &message, int alignment, const QColor &color)
@@ -237,6 +221,6 @@ void SplashScreen::paintEvent(QPaintEvent *event)
 
 void SplashScreen::closeEvent(QCloseEvent *event)
 {
-    StartShutdown(); // allows an "emergency" shutdown during startup
+    m_ipc_node.startShutdown(); // allows an "emergency" shutdown during startup
     event->ignore();
 }
diff --git a/src/qt/splashscreen.h b/src/qt/splashscreen.h
index a88ebb98a87..4cc5c766fe8 100644
--- a/src/qt/splashscreen.h
+++ b/src/qt/splashscreen.h
@@ -5,12 +5,18 @@
 #ifndef BITCOIN_QT_SPLASHSCREEN_H
 #define BITCOIN_QT_SPLASHSCREEN_H
 
-#include <functional>
 #include <QSplashScreen>
 
-class CWallet;
+#include <memory>
+
 class NetworkStyle;
 
+namespace ipc {
+class Handler;
+class Node;
+class Wallet;
+};
+
 /** Class for the splashscreen with information of the running client.
  *
  * @note this is intentionally not a QSplashScreen. Bitcoin Core initialization
@@ -22,7 +28,7 @@ class SplashScreen : public QWidget
     Q_OBJECT
 
 public:
-    explicit SplashScreen(Qt::WindowFlags f, const NetworkStyle *networkStyle);
+    explicit SplashScreen(ipc::Node& ipc_node, Qt::WindowFlags f, const NetworkStyle *networkStyle);
     ~SplashScreen();
 
 protected:
@@ -35,9 +41,6 @@ public Q_SLOTS:
 
     /** Show message and progress */
     void showMessage(const QString &message, int alignment, const QColor &color);
-
-    /** Sets the break action */
-    void setBreakAction(const std::function<void(void)> &action);
 protected:
     bool eventFilter(QObject * obj, QEvent * ev);
 
@@ -47,16 +50,19 @@ public Q_SLOTS:
     /** Disconnect core signals to splash screen */
     void unsubscribeFromCoreSignals();
     /** Connect wallet signals to splash screen */
-    void ConnectWallet(CWallet*);
+    void ConnectWallet(std::unique_ptr<ipc::Wallet> wallet);
 
     QPixmap pixmap;
     QString curMessage;
     QColor curColor;
     int curAlignment;
 
-    QList<CWallet*> connectedWallets;
-
-    std::function<void(void)> breakAction;
+    ipc::Node& m_ipc_node;
+    std::unique_ptr<ipc::Handler> m_handler_init_message;
+    std::unique_ptr<ipc::Handler> m_handler_show_progress;
+    std::unique_ptr<ipc::Handler> m_handler_load_wallet;
+    std::list<std::unique_ptr<ipc::Wallet>> m_connected_wallets;
+    std::list<std::unique_ptr<ipc::Handler>> m_connected_wallet_handlers;
 };
 
 #endif // BITCOIN_QT_SPLASHSCREEN_H
diff --git a/src/qt/test/paymentservertests.cpp b/src/qt/test/paymentservertests.cpp
index d9fb8698212..1370291fde5 100644
--- a/src/qt/test/paymentservertests.cpp
+++ b/src/qt/test/paymentservertests.cpp
@@ -8,6 +8,7 @@
 #include "paymentrequestdata.h"
 
 #include "amount.h"
+#include "ipc/interfaces.h"
 #include "random.h"
 #include "script/script.h"
 #include "script/standard.h"
@@ -65,7 +66,8 @@ static SendCoinsRecipient handleRequest(PaymentServer* server, std::vector<unsig
 void PaymentServerTests::paymentServerTests()
 {
     SelectParams(CBaseChainParams::MAIN);
-    OptionsModel optionsModel;
+    auto ipc_node = ipc::MakeNode(ipc::LOCAL);
+    OptionsModel optionsModel(*ipc_node);
     PaymentServer* server = new PaymentServer(nullptr, false);
     X509_STORE* caStore = X509_STORE_new();
     X509_STORE_add_cert(caStore, parse_b64der_cert(caCert1_BASE64));
@@ -144,7 +146,7 @@ void PaymentServerTests::paymentServerTests()
     // Ensure the request is initialized, because network "main" is default, even for
     // uninitialized payment requests and that will fail our test here.
     QVERIFY(r.paymentRequest.IsInitialized());
-    QCOMPARE(PaymentServer::verifyNetwork(r.paymentRequest.getDetails()), false);
+    QCOMPARE(PaymentServer::verifyNetwork(*ipc_node, r.paymentRequest.getDetails()), false);
 
     // Expired payment request (expires is set to 1 = 1970-01-01 00:00:01):
     data = DecodeBase64(paymentrequest2_cert2_BASE64);
diff --git a/src/qt/test/rpcnestedtests.cpp b/src/qt/test/rpcnestedtests.cpp
index e2abfb3742e..1ff19105f87 100644
--- a/src/qt/test/rpcnestedtests.cpp
+++ b/src/qt/test/rpcnestedtests.cpp
@@ -7,6 +7,7 @@
 #include "chainparams.h"
 #include "consensus/validation.h"
 #include "fs.h"
+#include "ipc/interfaces.h"
 #include "validation.h"
 #include "rpc/register.h"
 #include "rpc/server.h"
@@ -51,90 +52,91 @@ void RPCNestedTests::rpcNestedTests()
     std::string result;
     std::string result2;
     std::string filtered;
-    RPCConsole::RPCExecuteCommandLine(result, "getblockchaininfo()[chain]", &filtered); //simple result filtering with path
+    auto ipc_node = ipc::MakeNode(ipc::LOCAL);
+    RPCConsole::RPCExecuteCommandLine(*ipc_node, result, "getblockchaininfo()[chain]", &filtered); //simple result filtering with path
     QVERIFY(result=="main");
     QVERIFY(filtered == "getblockchaininfo()[chain]");
 
-    RPCConsole::RPCExecuteCommandLine(result, "getblock(getbestblockhash())"); //simple 2 level nesting
-    RPCConsole::RPCExecuteCommandLine(result, "getblock(getblock(getbestblockhash())[hash], true)");
+    RPCConsole::RPCExecuteCommandLine(*ipc_node, result, "getblock(getbestblockhash())"); //simple 2 level nesting
+    RPCConsole::RPCExecuteCommandLine(*ipc_node, result, "getblock(getblock(getbestblockhash())[hash], true)");
 
-    RPCConsole::RPCExecuteCommandLine(result, "getblock( getblock( getblock(getbestblockhash())[hash] )[hash], true)"); //4 level nesting with whitespace, filtering path and boolean parameter
+    RPCConsole::RPCExecuteCommandLine(*ipc_node, result, "getblock( getblock( getblock(getbestblockhash())[hash] )[hash], true)"); //4 level nesting with whitespace, filtering path and boolean parameter
 
-    RPCConsole::RPCExecuteCommandLine(result, "getblockchaininfo");
+    RPCConsole::RPCExecuteCommandLine(*ipc_node, result, "getblockchaininfo");
     QVERIFY(result.substr(0,1) == "{");
 
-    RPCConsole::RPCExecuteCommandLine(result, "getblockchaininfo()");
+    RPCConsole::RPCExecuteCommandLine(*ipc_node, result, "getblockchaininfo()");
     QVERIFY(result.substr(0,1) == "{");
 
-    RPCConsole::RPCExecuteCommandLine(result, "getblockchaininfo "); //whitespace at the end will be tolerated
+    RPCConsole::RPCExecuteCommandLine(*ipc_node, result, "getblockchaininfo "); //whitespace at the end will be tolerated
     QVERIFY(result.substr(0,1) == "{");
 
-    (RPCConsole::RPCExecuteCommandLine(result, "getblockchaininfo()[\"chain\"]")); //Quote path identifier are allowed, but look after a child contaning the quotes in the key
+    (RPCConsole::RPCExecuteCommandLine(*ipc_node, result, "getblockchaininfo()[\"chain\"]")); //Quote path identifier are allowed, but look after a child contaning the quotes in the key
     QVERIFY(result == "null");
 
-    (RPCConsole::RPCExecuteCommandLine(result, "createrawtransaction [] {} 0")); //parameter not in brackets are allowed
-    (RPCConsole::RPCExecuteCommandLine(result2, "createrawtransaction([],{},0)")); //parameter in brackets are allowed
+    (RPCConsole::RPCExecuteCommandLine(*ipc_node, result, "createrawtransaction [] {} 0")); //parameter not in brackets are allowed
+    (RPCConsole::RPCExecuteCommandLine(*ipc_node, result2, "createrawtransaction([],{},0)")); //parameter in brackets are allowed
     QVERIFY(result == result2);
-    (RPCConsole::RPCExecuteCommandLine(result2, "createrawtransaction( [],  {} , 0   )")); //whitespace between parametres is allowed
+    (RPCConsole::RPCExecuteCommandLine(*ipc_node, result2, "createrawtransaction( [],  {} , 0   )")); //whitespace between parametres is allowed
     QVERIFY(result == result2);
 
-    RPCConsole::RPCExecuteCommandLine(result, "getblock(getbestblockhash())[tx][0]", &filtered);
+    RPCConsole::RPCExecuteCommandLine(*ipc_node, result, "getblock(getbestblockhash())[tx][0]", &filtered);
     QVERIFY(result == "4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b");
     QVERIFY(filtered == "getblock(getbestblockhash())[tx][0]");
 
-    RPCConsole::RPCParseCommandLine(result, "importprivkey", false, &filtered);
+    RPCConsole::RPCParseCommandLine(nullptr, result, "importprivkey", false, &filtered);
     QVERIFY(filtered == "importprivkey(…)");
-    RPCConsole::RPCParseCommandLine(result, "signmessagewithprivkey abc", false, &filtered);
+    RPCConsole::RPCParseCommandLine(nullptr, result, "signmessagewithprivkey abc", false, &filtered);
     QVERIFY(filtered == "signmessagewithprivkey(…)");
-    RPCConsole::RPCParseCommandLine(result, "signmessagewithprivkey abc,def", false, &filtered);
+    RPCConsole::RPCParseCommandLine(nullptr, result, "signmessagewithprivkey abc,def", false, &filtered);
     QVERIFY(filtered == "signmessagewithprivkey(…)");
-    RPCConsole::RPCParseCommandLine(result, "signrawtransaction(abc)", false, &filtered);
+    RPCConsole::RPCParseCommandLine(nullptr, result, "signrawtransaction(abc)", false, &filtered);
     QVERIFY(filtered == "signrawtransaction(…)");
-    RPCConsole::RPCParseCommandLine(result, "walletpassphrase(help())", false, &filtered);
+    RPCConsole::RPCParseCommandLine(nullptr, result, "walletpassphrase(help())", false, &filtered);
     QVERIFY(filtered == "walletpassphrase(…)");
-    RPCConsole::RPCParseCommandLine(result, "walletpassphrasechange(help(walletpassphrasechange(abc)))", false, &filtered);
+    RPCConsole::RPCParseCommandLine(nullptr, result, "walletpassphrasechange(help(walletpassphrasechange(abc)))", false, &filtered);
     QVERIFY(filtered == "walletpassphrasechange(…)");
-    RPCConsole::RPCParseCommandLine(result, "help(encryptwallet(abc, def))", false, &filtered);
+    RPCConsole::RPCParseCommandLine(nullptr, result, "help(encryptwallet(abc, def))", false, &filtered);
     QVERIFY(filtered == "help(encryptwallet(…))");
-    RPCConsole::RPCParseCommandLine(result, "help(importprivkey())", false, &filtered);
+    RPCConsole::RPCParseCommandLine(nullptr, result, "help(importprivkey())", false, &filtered);
     QVERIFY(filtered == "help(importprivkey(…))");
-    RPCConsole::RPCParseCommandLine(result, "help(importprivkey(help()))", false, &filtered);
+    RPCConsole::RPCParseCommandLine(nullptr, result, "help(importprivkey(help()))", false, &filtered);
     QVERIFY(filtered == "help(importprivkey(…))");
-    RPCConsole::RPCParseCommandLine(result, "help(importprivkey(abc), walletpassphrase(def))", false, &filtered);
+    RPCConsole::RPCParseCommandLine(nullptr, result, "help(importprivkey(abc), walletpassphrase(def))", false, &filtered);
     QVERIFY(filtered == "help(importprivkey(…), walletpassphrase(…))");
 
-    RPCConsole::RPCExecuteCommandLine(result, "rpcNestedTest");
+    RPCConsole::RPCExecuteCommandLine(*ipc_node, result, "rpcNestedTest");
     QVERIFY(result == "[]");
-    RPCConsole::RPCExecuteCommandLine(result, "rpcNestedTest ''");
+    RPCConsole::RPCExecuteCommandLine(*ipc_node, result, "rpcNestedTest ''");
     QVERIFY(result == "[\"\"]");
-    RPCConsole::RPCExecuteCommandLine(result, "rpcNestedTest \"\"");
+    RPCConsole::RPCExecuteCommandLine(*ipc_node, result, "rpcNestedTest \"\"");
     QVERIFY(result == "[\"\"]");
-    RPCConsole::RPCExecuteCommandLine(result, "rpcNestedTest '' abc");
+    RPCConsole::RPCExecuteCommandLine(*ipc_node, result, "rpcNestedTest '' abc");
     QVERIFY(result == "[\"\",\"abc\"]");
-    RPCConsole::RPCExecuteCommandLine(result, "rpcNestedTest abc '' abc");
+    RPCConsole::RPCExecuteCommandLine(*ipc_node, result, "rpcNestedTest abc '' abc");
     QVERIFY(result == "[\"abc\",\"\",\"abc\"]");
-    RPCConsole::RPCExecuteCommandLine(result, "rpcNestedTest abc  abc");
+    RPCConsole::RPCExecuteCommandLine(*ipc_node, result, "rpcNestedTest abc  abc");
     QVERIFY(result == "[\"abc\",\"abc\"]");
-    RPCConsole::RPCExecuteCommandLine(result, "rpcNestedTest abc\t\tabc");
+    RPCConsole::RPCExecuteCommandLine(*ipc_node, result, "rpcNestedTest abc\t\tabc");
     QVERIFY(result == "[\"abc\",\"abc\"]");
-    RPCConsole::RPCExecuteCommandLine(result, "rpcNestedTest(abc )");
+    RPCConsole::RPCExecuteCommandLine(*ipc_node, result, "rpcNestedTest(abc )");
     QVERIFY(result == "[\"abc\"]");
-    RPCConsole::RPCExecuteCommandLine(result, "rpcNestedTest( abc )");
+    RPCConsole::RPCExecuteCommandLine(*ipc_node, result, "rpcNestedTest( abc )");
     QVERIFY(result == "[\"abc\"]");
-    RPCConsole::RPCExecuteCommandLine(result, "rpcNestedTest(   abc   ,   cba )");
+    RPCConsole::RPCExecuteCommandLine(*ipc_node, result, "rpcNestedTest(   abc   ,   cba )");
     QVERIFY(result == "[\"abc\",\"cba\"]");
 
 #if QT_VERSION >= 0x050300
     // do the QVERIFY_EXCEPTION_THROWN checks only with Qt5.3 and higher (QVERIFY_EXCEPTION_THROWN was introduced in Qt5.3)
-    QVERIFY_EXCEPTION_THROWN(RPCConsole::RPCExecuteCommandLine(result, "getblockchaininfo() .\n"), std::runtime_error); //invalid syntax
-    QVERIFY_EXCEPTION_THROWN(RPCConsole::RPCExecuteCommandLine(result, "getblockchaininfo() getblockchaininfo()"), std::runtime_error); //invalid syntax
-    (RPCConsole::RPCExecuteCommandLine(result, "getblockchaininfo(")); //tolerate non closing brackets if we have no arguments
-    (RPCConsole::RPCExecuteCommandLine(result, "getblockchaininfo()()()")); //tolerate non command brackts
-    QVERIFY_EXCEPTION_THROWN(RPCConsole::RPCExecuteCommandLine(result, "getblockchaininfo(True)"), UniValue); //invalid argument
-    QVERIFY_EXCEPTION_THROWN(RPCConsole::RPCExecuteCommandLine(result, "a(getblockchaininfo(True))"), UniValue); //method not found
-    QVERIFY_EXCEPTION_THROWN(RPCConsole::RPCExecuteCommandLine(result, "rpcNestedTest abc,,abc"), std::runtime_error); //don't tollerate empty arguments when using ,
-    QVERIFY_EXCEPTION_THROWN(RPCConsole::RPCExecuteCommandLine(result, "rpcNestedTest(abc,,abc)"), std::runtime_error); //don't tollerate empty arguments when using ,
-    QVERIFY_EXCEPTION_THROWN(RPCConsole::RPCExecuteCommandLine(result, "rpcNestedTest(abc,,)"), std::runtime_error); //don't tollerate empty arguments when using ,
+    QVERIFY_EXCEPTION_THROWN(RPCConsole::RPCExecuteCommandLine(*ipc_node, result, "getblockchaininfo() .\n"), std::runtime_error); //invalid syntax
+    QVERIFY_EXCEPTION_THROWN(RPCConsole::RPCExecuteCommandLine(*ipc_node, result, "getblockchaininfo() getblockchaininfo()"), std::runtime_error); //invalid syntax
+    (RPCConsole::RPCExecuteCommandLine(*ipc_node, result, "getblockchaininfo(")); //tolerate non closing brackets if we have no arguments
+    (RPCConsole::RPCExecuteCommandLine(*ipc_node, result, "getblockchaininfo()()()")); //tolerate non command brackts
+    QVERIFY_EXCEPTION_THROWN(RPCConsole::RPCExecuteCommandLine(*ipc_node, result, "getblockchaininfo(True)"), UniValue); //invalid argument
+    QVERIFY_EXCEPTION_THROWN(RPCConsole::RPCExecuteCommandLine(*ipc_node, result, "a(getblockchaininfo(True))"), UniValue); //method not found
+    QVERIFY_EXCEPTION_THROWN(RPCConsole::RPCExecuteCommandLine(*ipc_node, result, "rpcNestedTest abc,,abc"), std::runtime_error); //don't tollerate empty arguments when using ,
+    QVERIFY_EXCEPTION_THROWN(RPCConsole::RPCExecuteCommandLine(*ipc_node, result, "rpcNestedTest(abc,,abc)"), std::runtime_error); //don't tollerate empty arguments when using ,
+    QVERIFY_EXCEPTION_THROWN(RPCConsole::RPCExecuteCommandLine(*ipc_node, result, "rpcNestedTest(abc,,)"), std::runtime_error); //don't tollerate empty arguments when using ,
 #endif
 
     fs::remove_all(fs::path(path));
diff --git a/src/qt/test/wallettests.cpp b/src/qt/test/wallettests.cpp
index ff1eb59f16b..5bba6e9f450 100644
--- a/src/qt/test/wallettests.cpp
+++ b/src/qt/test/wallettests.cpp
@@ -1,5 +1,6 @@
 #include "wallettests.h"
 
+#include "ipc/interfaces.h"
 #include "qt/bitcoinamountfield.h"
 #include "qt/callback.h"
 #include "qt/optionsmodel.h"
@@ -164,8 +165,11 @@ void TestSendCoins()
     std::unique_ptr<const PlatformStyle> platformStyle(PlatformStyle::instantiate("other"));
     SendCoinsDialog sendCoinsDialog(platformStyle.get());
     TransactionView transactionView(platformStyle.get());
-    OptionsModel optionsModel;
-    WalletModel walletModel(platformStyle.get(), &wallet, &optionsModel);
+    auto ipc_node = ipc::MakeNode(ipc::LOCAL);
+    OptionsModel optionsModel(*ipc_node);
+    vpwallets.insert(vpwallets.begin(), &wallet);
+    WalletModel walletModel(ipc_node->getWallet(0), *ipc_node, platformStyle.get(), &optionsModel);
+    vpwallets.erase(vpwallets.begin());
     sendCoinsDialog.setModel(&walletModel);
     transactionView.setModel(&walletModel);
 
diff --git a/src/qt/trafficgraphwidget.cpp b/src/qt/trafficgraphwidget.cpp
index 5bb863451fd..580b26f7458 100644
--- a/src/qt/trafficgraphwidget.cpp
+++ b/src/qt/trafficgraphwidget.cpp
@@ -4,6 +4,7 @@
 
 #include "trafficgraphwidget.h"
 #include "clientmodel.h"
+#include "ipc/interfaces.h"
 
 #include <QPainter>
 #include <QColor>
@@ -35,8 +36,8 @@ void TrafficGraphWidget::setClientModel(ClientModel *model)
 {
     clientModel = model;
     if(model) {
-        nLastBytesIn = model->getTotalBytesRecv();
-        nLastBytesOut = model->getTotalBytesSent();
+        nLastBytesIn = model->getIpcNode().getTotalBytesRecv();
+        nLastBytesOut = model->getIpcNode().getTotalBytesSent();
     }
 }
 
@@ -123,8 +124,8 @@ void TrafficGraphWidget::updateRates()
 {
     if(!clientModel) return;
 
-    quint64 bytesIn = clientModel->getTotalBytesRecv(),
-            bytesOut = clientModel->getTotalBytesSent();
+    quint64 bytesIn = clientModel->getIpcNode().getTotalBytesRecv(),
+            bytesOut = clientModel->getIpcNode().getTotalBytesSent();
     float inRate = (bytesIn - nLastBytesIn) / 1024.0f * 1000 / timer->interval();
     float outRate = (bytesOut - nLastBytesOut) / 1024.0f * 1000 / timer->interval();
     vSamplesIn.push_front(inRate);
@@ -169,8 +170,8 @@ void TrafficGraphWidget::clear()
     fMax = 0.0f;
 
     if(clientModel) {
-        nLastBytesIn = clientModel->getTotalBytesRecv();
-        nLastBytesOut = clientModel->getTotalBytesSent();
+        nLastBytesIn = clientModel->getIpcNode().getTotalBytesRecv();
+        nLastBytesOut = clientModel->getIpcNode().getTotalBytesSent();
     }
     timer->start();
 }
diff --git a/src/qt/transactiondesc.cpp b/src/qt/transactiondesc.cpp
index bcacc47ef3e..fe3fa3b7d77 100644
--- a/src/qt/transactiondesc.cpp
+++ b/src/qt/transactiondesc.cpp
@@ -11,35 +11,34 @@
 
 #include "base58.h"
 #include "consensus/consensus.h"
+#include "ipc/interfaces.h"
 #include "validation.h"
 #include "script/script.h"
 #include "timedata.h"
 #include "util.h"
-#include "wallet/db.h"
-#include "wallet/wallet.h"
+#include "utilstrencodings.h"
 
 #include <stdint.h>
 #include <string>
 
-QString TransactionDesc::FormatTxStatus(const CWalletTx& wtx)
+QString TransactionDesc::FormatTxStatus(const ipc::WalletTx& wtx, const ipc::WalletTxStatus& status, bool inMempool, int numBlocks, int64_t adjustedTime)
 {
-    AssertLockHeld(cs_main);
-    if (!CheckFinalTx(wtx))
+    if (!status.is_final)
     {
         if (wtx.tx->nLockTime < LOCKTIME_THRESHOLD)
-            return tr("Open for %n more block(s)", "", wtx.tx->nLockTime - chainActive.Height());
+            return tr("Open for %n more block(s)", "", wtx.tx->nLockTime - numBlocks);
         else
             return tr("Open until %1").arg(GUIUtil::dateTimeStr(wtx.tx->nLockTime));
     }
     else
     {
-        int nDepth = wtx.GetDepthInMainChain();
+        int nDepth = status.depth_in_main_chain;
         if (nDepth < 0)
             return tr("conflicted with a transaction with %1 confirmations").arg(-nDepth);
-        else if (GetAdjustedTime() - wtx.nTimeReceived > 2 * 60 && wtx.GetRequestCount() == 0)
+        else if (adjustedTime - status.time_received > 2 * 60 && status.request_count == 0)
             return tr("%1/offline").arg(nDepth);
         else if (nDepth == 0)
-            return tr("0/unconfirmed, %1").arg((wtx.InMempool() ? tr("in memory pool") : tr("not in memory pool"))) + (wtx.isAbandoned() ? ", "+tr("abandoned") : "");
+            return tr("0/unconfirmed, %1").arg((inMempool ? tr("in memory pool") : tr("not in memory pool"))) + (status.is_abandoned ? ", "+tr("abandoned") : "");
         else if (nDepth < 6)
             return tr("%1/unconfirmed").arg(nDepth);
         else
@@ -47,21 +46,27 @@ QString TransactionDesc::FormatTxStatus(const CWalletTx& wtx)
     }
 }
 
-QString TransactionDesc::toHTML(CWallet *wallet, CWalletTx &wtx, TransactionRecord *rec, int unit)
+QString TransactionDesc::toHTML(ipc::Node& ipc_node, ipc::Wallet& ipc_wallet, TransactionRecord *rec, int unit)
 {
+    int numBlocks;
+    int64_t adjustedTime;
+    ipc::WalletTxStatus status;
+    ipc::WalletOrderForm orderForm;
+    bool inMempool;
+    ipc::WalletTx wtx = ipc_wallet.getWalletTxDetails(rec->hash, status, orderForm, inMempool, numBlocks, adjustedTime);
+
     QString strHTML;
 
-    LOCK2(cs_main, wallet->cs_wallet);
     strHTML.reserve(4000);
     strHTML += "<html><font face='verdana, arial, helvetica, sans-serif'>";
 
-    int64_t nTime = wtx.GetTxTime();
-    CAmount nCredit = wtx.GetCredit(ISMINE_ALL);
-    CAmount nDebit = wtx.GetDebit(ISMINE_ALL);
+    int64_t nTime = wtx.time;
+    CAmount nCredit = wtx.credit;
+    CAmount nDebit = wtx.debit;
     CAmount nNet = nCredit - nDebit;
 
-    strHTML += "<b>" + tr("Status") + ":</b> " + FormatTxStatus(wtx);
-    int nRequests = wtx.GetRequestCount();
+    strHTML += "<b>" + tr("Status") + ":</b> " + FormatTxStatus(wtx, status, inMempool, numBlocks, adjustedTime);
+    int nRequests = status.request_count;
     if (nRequests != -1)
     {
         if (nRequests == 0)
@@ -76,14 +81,14 @@ QString TransactionDesc::toHTML(CWallet *wallet, CWalletTx &wtx, TransactionReco
     //
     // From
     //
-    if (wtx.IsCoinBase())
+    if (wtx.is_coinbase)
     {
         strHTML += "<b>" + tr("Source") + ":</b> " + tr("Generated") + "<br>";
     }
-    else if (wtx.mapValue.count("from") && !wtx.mapValue["from"].empty())
+    else if (wtx.value_map.count("from") && !wtx.value_map["from"].empty())
     {
         // Online transaction
-        strHTML += "<b>" + tr("From") + ":</b> " + GUIUtil::HtmlEscape(wtx.mapValue["from"]) + "<br>";
+        strHTML += "<b>" + tr("From") + ":</b> " + GUIUtil::HtmlEscape(wtx.value_map["from"]) + "<br>";
     }
     else
     {
@@ -94,14 +99,16 @@ QString TransactionDesc::toHTML(CWallet *wallet, CWalletTx &wtx, TransactionReco
             if (CBitcoinAddress(rec->address).IsValid())
             {
                 CTxDestination address = CBitcoinAddress(rec->address).Get();
-                if (wallet->mapAddressBook.count(address))
+                std::string name;
+                isminetype ismine;
+                if (ipc_wallet.getAddress(address, &name, &ismine))
                 {
                     strHTML += "<b>" + tr("From") + ":</b> " + tr("unknown") + "<br>";
                     strHTML += "<b>" + tr("To") + ":</b> ";
                     strHTML += GUIUtil::HtmlEscape(rec->address);
-                    QString addressOwned = (::IsMine(*wallet, address) == ISMINE_SPENDABLE) ? tr("own address") : tr("watch-only");
-                    if (!wallet->mapAddressBook[address].name.empty())
-                        strHTML += " (" + addressOwned + ", " + tr("label") + ": " + GUIUtil::HtmlEscape(wallet->mapAddressBook[address].name) + ")";
+                    QString addressOwned = ismine == ISMINE_SPENDABLE ? tr("own address") : tr("watch-only");
+                    if (!name.empty())
+                        strHTML += " (" + addressOwned + ", " + tr("label") + ": " + GUIUtil::HtmlEscape(name) + ")";
                     else
                         strHTML += " (" + addressOwned + ")";
                     strHTML += "<br>";
@@ -113,31 +120,32 @@ QString TransactionDesc::toHTML(CWallet *wallet, CWalletTx &wtx, TransactionReco
     //
     // To
     //
-    if (wtx.mapValue.count("to") && !wtx.mapValue["to"].empty())
+    if (wtx.value_map.count("to") && !wtx.value_map["to"].empty())
     {
         // Online transaction
-        std::string strAddress = wtx.mapValue["to"];
+        std::string strAddress = wtx.value_map["to"];
         strHTML += "<b>" + tr("To") + ":</b> ";
         CTxDestination dest = CBitcoinAddress(strAddress).Get();
-        if (wallet->mapAddressBook.count(dest) && !wallet->mapAddressBook[dest].name.empty())
-            strHTML += GUIUtil::HtmlEscape(wallet->mapAddressBook[dest].name) + " ";
+        std::string name;
+        if (ipc_wallet.getAddress(dest, &name) && !name.empty())
+            strHTML += GUIUtil::HtmlEscape(name) + " ";
         strHTML += GUIUtil::HtmlEscape(strAddress) + "<br>";
     }
 
     //
     // Amount
     //
-    if (wtx.IsCoinBase() && nCredit == 0)
+    if (wtx.is_coinbase && nCredit == 0)
     {
         //
         // Coinbase
         //
         CAmount nUnmatured = 0;
         for (const CTxOut& txout : wtx.tx->vout)
-            nUnmatured += wallet->GetCredit(txout, ISMINE_ALL);
+            nUnmatured += ipc_wallet.getCredit(txout, ISMINE_ALL);
         strHTML += "<b>" + tr("Credit") + ":</b> ";
-        if (wtx.IsInMainChain())
-            strHTML += BitcoinUnits::formatHtmlWithUnit(unit, nUnmatured)+ " (" + tr("matures in %n more block(s)", "", wtx.GetBlocksToMaturity()) + ")";
+        if (status.is_in_main_chain)
+            strHTML += BitcoinUnits::formatHtmlWithUnit(unit, nUnmatured)+ " (" + tr("matures in %n more block(s)", "", status.blocks_to_maturity) + ")";
         else
             strHTML += "(" + tr("not accepted") + ")";
         strHTML += "<br>";
@@ -152,16 +160,14 @@ QString TransactionDesc::toHTML(CWallet *wallet, CWalletTx &wtx, TransactionReco
     else
     {
         isminetype fAllFromMe = ISMINE_SPENDABLE;
-        for (const CTxIn& txin : wtx.tx->vin)
+        for (isminetype mine : wtx.txin_is_mine)
         {
-            isminetype mine = wallet->IsMine(txin);
             if(fAllFromMe > mine) fAllFromMe = mine;
         }
 
         isminetype fAllToMe = ISMINE_SPENDABLE;
-        for (const CTxOut& txout : wtx.tx->vout)
+        for (isminetype mine : wtx.txout_is_mine)
         {
-            isminetype mine = wallet->IsMine(txout);
             if(fAllToMe > mine) fAllToMe = mine;
         }
 
@@ -173,22 +179,24 @@ QString TransactionDesc::toHTML(CWallet *wallet, CWalletTx &wtx, TransactionReco
             //
             // Debit
             //
+            auto mine = wtx.txout_is_mine.begin();
             for (const CTxOut& txout : wtx.tx->vout)
             {
                 // Ignore change
-                isminetype toSelf = wallet->IsMine(txout);
+                isminetype toSelf = *(mine++);
                 if ((toSelf == ISMINE_SPENDABLE) && (fAllFromMe == ISMINE_SPENDABLE))
                     continue;
 
-                if (!wtx.mapValue.count("to") || wtx.mapValue["to"].empty())
+                if (!wtx.value_map.count("to") || wtx.value_map["to"].empty())
                 {
                     // Offline transaction
                     CTxDestination address;
                     if (ExtractDestination(txout.scriptPubKey, address))
                     {
                         strHTML += "<b>" + tr("To") + ":</b> ";
-                        if (wallet->mapAddressBook.count(address) && !wallet->mapAddressBook[address].name.empty())
-                            strHTML += GUIUtil::HtmlEscape(wallet->mapAddressBook[address].name) + " ";
+                        std::string name;
+                        if (ipc_wallet.getAddress(address, &name) && !name.empty())
+                            strHTML += GUIUtil::HtmlEscape(name) + " ";
                         strHTML += GUIUtil::HtmlEscape(CBitcoinAddress(address).ToString());
                         if(toSelf == ISMINE_SPENDABLE)
                             strHTML += " (own address)";
@@ -206,7 +214,7 @@ QString TransactionDesc::toHTML(CWallet *wallet, CWalletTx &wtx, TransactionReco
             if (fAllToMe)
             {
                 // Payment to self
-                CAmount nChange = wtx.GetChange();
+                CAmount nChange = wtx.change;
                 CAmount nValue = nCredit - nChange;
                 strHTML += "<b>" + tr("Total debit") + ":</b> " + BitcoinUnits::formatHtmlWithUnit(unit, -nValue) + "<br>";
                 strHTML += "<b>" + tr("Total credit") + ":</b> " + BitcoinUnits::formatHtmlWithUnit(unit, nValue) + "<br>";
@@ -221,12 +229,18 @@ QString TransactionDesc::toHTML(CWallet *wallet, CWalletTx &wtx, TransactionReco
             //
             // Mixed debit transaction
             //
-            for (const CTxIn& txin : wtx.tx->vin)
-                if (wallet->IsMine(txin))
-                    strHTML += "<b>" + tr("Debit") + ":</b> " + BitcoinUnits::formatHtmlWithUnit(unit, -wallet->GetDebit(txin, ISMINE_ALL)) + "<br>";
-            for (const CTxOut& txout : wtx.tx->vout)
-                if (wallet->IsMine(txout))
-                    strHTML += "<b>" + tr("Credit") + ":</b> " + BitcoinUnits::formatHtmlWithUnit(unit, wallet->GetCredit(txout, ISMINE_ALL)) + "<br>";
+            auto mine = wtx.txin_is_mine.begin();
+            for (const CTxIn& txin : wtx.tx->vin) {
+                if (*(mine++)) {
+                    strHTML += "<b>" + tr("Debit") + ":</b> " + BitcoinUnits::formatHtmlWithUnit(unit, -ipc_wallet.getDebit(txin, ISMINE_ALL)) + "<br>";
+                }
+            }
+            mine = wtx.txout_is_mine.begin();
+            for (const CTxOut& txout : wtx.tx->vout) {
+                if (*(mine++)) {
+                    strHTML += "<b>" + tr("Credit") + ":</b> " + BitcoinUnits::formatHtmlWithUnit(unit, ipc_wallet.getCredit(txout, ISMINE_ALL)) + "<br>";
+                }
+            }
         }
     }
 
@@ -235,24 +249,24 @@ QString TransactionDesc::toHTML(CWallet *wallet, CWalletTx &wtx, TransactionReco
     //
     // Message
     //
-    if (wtx.mapValue.count("message") && !wtx.mapValue["message"].empty())
-        strHTML += "<br><b>" + tr("Message") + ":</b><br>" + GUIUtil::HtmlEscape(wtx.mapValue["message"], true) + "<br>";
-    if (wtx.mapValue.count("comment") && !wtx.mapValue["comment"].empty())
-        strHTML += "<br><b>" + tr("Comment") + ":</b><br>" + GUIUtil::HtmlEscape(wtx.mapValue["comment"], true) + "<br>";
+    if (wtx.value_map.count("message") && !wtx.value_map["message"].empty())
+        strHTML += "<br><b>" + tr("Message") + ":</b><br>" + GUIUtil::HtmlEscape(wtx.value_map["message"], true) + "<br>";
+    if (wtx.value_map.count("comment") && !wtx.value_map["comment"].empty())
+        strHTML += "<br><b>" + tr("Comment") + ":</b><br>" + GUIUtil::HtmlEscape(wtx.value_map["comment"], true) + "<br>";
 
     strHTML += "<b>" + tr("Transaction ID") + ":</b> " + rec->getTxID() + "<br>";
     strHTML += "<b>" + tr("Transaction total size") + ":</b> " + QString::number(wtx.tx->GetTotalSize()) + " bytes<br>";
     strHTML += "<b>" + tr("Output index") + ":</b> " + QString::number(rec->getOutputIndex()) + "<br>";
 
     // Message from normal bitcoin:URI (bitcoin:123...?message=example)
-    for (const std::pair<std::string, std::string>& r : wtx.vOrderForm)
+    for (const std::pair<std::string, std::string>& r : orderForm)
         if (r.first == "Message")
             strHTML += "<br><b>" + tr("Message") + ":</b><br>" + GUIUtil::HtmlEscape(r.second, true) + "<br>";
 
     //
     // PaymentRequest info:
     //
-    for (const std::pair<std::string, std::string>& r : wtx.vOrderForm)
+    for (const std::pair<std::string, std::string>& r : orderForm)
     {
         if (r.first == "PaymentRequest")
         {
@@ -264,7 +278,7 @@ QString TransactionDesc::toHTML(CWallet *wallet, CWalletTx &wtx, TransactionReco
         }
     }
 
-    if (wtx.IsCoinBase())
+    if (wtx.is_coinbase)
     {
         quint32 numBlocksToMaturity = COINBASE_MATURITY +  1;
         strHTML += "<br>" + tr("Generated coins must mature %1 blocks before they can be spent. When you generated this block, it was broadcast to the network to be added to the block chain. If it fails to get into the chain, its state will change to \"not accepted\" and it won't be spendable. This may occasionally happen if another node generates a block within a few seconds of yours.").arg(QString::number(numBlocksToMaturity)) + "<br>";
@@ -273,15 +287,15 @@ QString TransactionDesc::toHTML(CWallet *wallet, CWalletTx &wtx, TransactionReco
     //
     // Debug view
     //
-    if (logCategories != BCLog::NONE)
+    if (ipc_node.getLogCategories() != BCLog::NONE)
     {
         strHTML += "<hr><br>" + tr("Debug information") + "<br><br>";
         for (const CTxIn& txin : wtx.tx->vin)
-            if(wallet->IsMine(txin))
-                strHTML += "<b>" + tr("Debit") + ":</b> " + BitcoinUnits::formatHtmlWithUnit(unit, -wallet->GetDebit(txin, ISMINE_ALL)) + "<br>";
+            if(ipc_wallet.isMine(txin))
+                strHTML += "<b>" + tr("Debit") + ":</b> " + BitcoinUnits::formatHtmlWithUnit(unit, -ipc_wallet.getDebit(txin, ISMINE_ALL)) + "<br>";
         for (const CTxOut& txout : wtx.tx->vout)
-            if(wallet->IsMine(txout))
-                strHTML += "<b>" + tr("Credit") + ":</b> " + BitcoinUnits::formatHtmlWithUnit(unit, wallet->GetCredit(txout, ISMINE_ALL)) + "<br>";
+            if(ipc_wallet.isMine(txout))
+                strHTML += "<b>" + tr("Credit") + ":</b> " + BitcoinUnits::formatHtmlWithUnit(unit, ipc_wallet.getCredit(txout, ISMINE_ALL)) + "<br>";
 
         strHTML += "<br><b>" + tr("Transaction") + ":</b><br>";
         strHTML += GUIUtil::HtmlEscape(wtx.tx->ToString(), true);
@@ -294,7 +308,7 @@ QString TransactionDesc::toHTML(CWallet *wallet, CWalletTx &wtx, TransactionReco
             COutPoint prevout = txin.prevout;
 
             Coin prev;
-            if(pcoinsTip->GetCoin(prevout, prev))
+            if(ipc_node.getUnspentOutput(prevout, prev))
             {
                 {
                     strHTML += "<li>";
@@ -302,13 +316,14 @@ QString TransactionDesc::toHTML(CWallet *wallet, CWalletTx &wtx, TransactionReco
                     CTxDestination address;
                     if (ExtractDestination(vout.scriptPubKey, address))
                     {
-                        if (wallet->mapAddressBook.count(address) && !wallet->mapAddressBook[address].name.empty())
-                            strHTML += GUIUtil::HtmlEscape(wallet->mapAddressBook[address].name) + " ";
+                        std::string name;
+                        if (ipc_wallet.getAddress(address, &name) && !name.empty())
+                            strHTML += GUIUtil::HtmlEscape(name) + " ";
                         strHTML += QString::fromStdString(CBitcoinAddress(address).ToString());
                     }
                     strHTML = strHTML + " " + tr("Amount") + "=" + BitcoinUnits::formatHtmlWithUnit(unit, vout.nValue);
-                    strHTML = strHTML + " IsMine=" + (wallet->IsMine(vout) & ISMINE_SPENDABLE ? tr("true") : tr("false")) + "</li>";
-                    strHTML = strHTML + " IsWatchOnly=" + (wallet->IsMine(vout) & ISMINE_WATCH_ONLY ? tr("true") : tr("false")) + "</li>";
+                    strHTML = strHTML + " IsMine=" + (ipc_wallet.isMine(vout) & ISMINE_SPENDABLE ? tr("true") : tr("false")) + "</li>";
+                    strHTML = strHTML + " IsWatchOnly=" + (ipc_wallet.isMine(vout) & ISMINE_WATCH_ONLY ? tr("true") : tr("false")) + "</li>";
                 }
             }
         }
diff --git a/src/qt/transactiondesc.h b/src/qt/transactiondesc.h
index 01b90b130f6..31aaf3aae84 100644
--- a/src/qt/transactiondesc.h
+++ b/src/qt/transactiondesc.h
@@ -10,8 +10,12 @@
 
 class TransactionRecord;
 
-class CWallet;
-class CWalletTx;
+namespace ipc {
+class Node;
+class Wallet;
+class WalletTx;
+class WalletTxStatus;
+}
 
 /** Provide a human-readable extended HTML description of a transaction.
  */
@@ -20,12 +24,12 @@ class TransactionDesc: public QObject
     Q_OBJECT
 
 public:
-    static QString toHTML(CWallet *wallet, CWalletTx &wtx, TransactionRecord *rec, int unit);
+    static QString toHTML(ipc::Node& ipc_node, ipc::Wallet& ipc_wallet, TransactionRecord *rec, int unit);
 
 private:
     TransactionDesc() {}
 
-    static QString FormatTxStatus(const CWalletTx& wtx);
+    static QString FormatTxStatus(const ipc::WalletTx& wtx, const ipc::WalletTxStatus& status, bool inMempool, int numBlocks, int64_t adjustedTime);
 };
 
 #endif // BITCOIN_QT_TRANSACTIONDESC_H
diff --git a/src/qt/transactionrecord.cpp b/src/qt/transactionrecord.cpp
index 2ece0d0f289..18d4ac06da9 100644
--- a/src/qt/transactionrecord.cpp
+++ b/src/qt/transactionrecord.cpp
@@ -6,16 +6,16 @@
 
 #include "base58.h"
 #include "consensus/consensus.h"
+#include "ipc/interfaces.h"
 #include "validation.h"
 #include "timedata.h"
-#include "wallet/wallet.h"
 
 #include <stdint.h>
 
 
 /* Return positive answer if transaction should be shown in list.
  */
-bool TransactionRecord::showTransaction(const CWalletTx &wtx)
+bool TransactionRecord::showTransaction()
 {
     // There are currently no cases where we hide transactions, but
     // we may want to use this in the future for things like RBF.
@@ -25,17 +25,17 @@ bool TransactionRecord::showTransaction(const CWalletTx &wtx)
 /*
  * Decompose CWallet transaction to model transaction records.
  */
-QList<TransactionRecord> TransactionRecord::decomposeTransaction(const CWallet *wallet, const CWalletTx &wtx)
+QList<TransactionRecord> TransactionRecord::decomposeTransaction(const ipc::WalletTx& wtx)
 {
     QList<TransactionRecord> parts;
-    int64_t nTime = wtx.GetTxTime();
-    CAmount nCredit = wtx.GetCredit(ISMINE_ALL);
-    CAmount nDebit = wtx.GetDebit(ISMINE_ALL);
+    int64_t nTime = wtx.time;
+    CAmount nCredit = wtx.credit;
+    CAmount nDebit = wtx.debit;
     CAmount nNet = nCredit - nDebit;
-    uint256 hash = wtx.GetHash();
-    std::map<std::string, std::string> mapValue = wtx.mapValue;
+    uint256 hash = wtx.tx->GetHash();
+    std::map<std::string, std::string> mapValue = wtx.value_map;
 
-    if (nNet > 0 || wtx.IsCoinBase())
+    if (nNet > 0 || wtx.is_coinbase)
     {
         //
         // Credit
@@ -43,7 +43,7 @@ QList<TransactionRecord> TransactionRecord::decomposeTransaction(const CWallet *
         for(unsigned int i = 0; i < wtx.tx->vout.size(); i++)
         {
             const CTxOut& txout = wtx.tx->vout[i];
-            isminetype mine = wallet->IsMine(txout);
+            isminetype mine = wtx.txout_is_mine[i];
             if(mine)
             {
                 TransactionRecord sub(hash, nTime);
@@ -51,11 +51,11 @@ QList<TransactionRecord> TransactionRecord::decomposeTransaction(const CWallet *
                 sub.idx = i; // vout index
                 sub.credit = txout.nValue;
                 sub.involvesWatchAddress = mine & ISMINE_WATCH_ONLY;
-                if (ExtractDestination(txout.scriptPubKey, address) && IsMine(*wallet, address))
+                if (wtx.txout_address_is_mine[i])
                 {
                     // Received by Bitcoin Address
                     sub.type = TransactionRecord::RecvWithAddress;
-                    sub.address = CBitcoinAddress(address).ToString();
+                    sub.address = CBitcoinAddress(wtx.txout_address[i]).ToString();
                 }
                 else
                 {
@@ -63,7 +63,7 @@ QList<TransactionRecord> TransactionRecord::decomposeTransaction(const CWallet *
                     sub.type = TransactionRecord::RecvFromOther;
                     sub.address = mapValue["from"];
                 }
-                if (wtx.IsCoinBase())
+                if (wtx.is_coinbase)
                 {
                     // Generated
                     sub.type = TransactionRecord::Generated;
@@ -77,17 +77,15 @@ QList<TransactionRecord> TransactionRecord::decomposeTransaction(const CWallet *
     {
         bool involvesWatchAddress = false;
         isminetype fAllFromMe = ISMINE_SPENDABLE;
-        for (const CTxIn& txin : wtx.tx->vin)
+        for (isminetype mine : wtx.txin_is_mine)
         {
-            isminetype mine = wallet->IsMine(txin);
             if(mine & ISMINE_WATCH_ONLY) involvesWatchAddress = true;
             if(fAllFromMe > mine) fAllFromMe = mine;
         }
 
         isminetype fAllToMe = ISMINE_SPENDABLE;
-        for (const CTxOut& txout : wtx.tx->vout)
+        for (isminetype mine : wtx.txout_is_mine)
         {
-            isminetype mine = wallet->IsMine(txout);
             if(mine & ISMINE_WATCH_ONLY) involvesWatchAddress = true;
             if(fAllToMe > mine) fAllToMe = mine;
         }
@@ -95,7 +93,7 @@ QList<TransactionRecord> TransactionRecord::decomposeTransaction(const CWallet *
         if (fAllFromMe && fAllToMe)
         {
             // Payment to self
-            CAmount nChange = wtx.GetChange();
+            CAmount nChange = wtx.change;
 
             parts.append(TransactionRecord(hash, nTime, TransactionRecord::SendToSelf, "",
                             -(nDebit - nChange), nCredit - nChange));
@@ -115,19 +113,18 @@ QList<TransactionRecord> TransactionRecord::decomposeTransaction(const CWallet *
                 sub.idx = nOut;
                 sub.involvesWatchAddress = involvesWatchAddress;
 
-                if(wallet->IsMine(txout))
+                if(wtx.txout_is_mine[nOut])
                 {
                     // Ignore parts sent to self, as this is usually the change
                     // from a transaction sent back to our own address.
                     continue;
                 }
 
-                CTxDestination address;
-                if (ExtractDestination(txout.scriptPubKey, address))
+                if (!boost::get<CNoDestination>(&wtx.txout_address[nOut]))
                 {
                     // Sent to Bitcoin Address
                     sub.type = TransactionRecord::SendToAddress;
-                    sub.address = CBitcoinAddress(address).ToString();
+                    sub.address = CBitcoinAddress(wtx.txout_address[nOut]).ToString();
                 }
                 else
                 {
@@ -161,53 +158,46 @@ QList<TransactionRecord> TransactionRecord::decomposeTransaction(const CWallet *
     return parts;
 }
 
-void TransactionRecord::updateStatus(const CWalletTx &wtx)
+void TransactionRecord::updateStatus(const ipc::WalletTxStatus& wtx, int numBlocks, int64_t adjustedTime)
 {
-    AssertLockHeld(cs_main);
     // Determine transaction status
 
-    // Find the block the tx is in
-    CBlockIndex* pindex = nullptr;
-    BlockMap::iterator mi = mapBlockIndex.find(wtx.hashBlock);
-    if (mi != mapBlockIndex.end())
-        pindex = (*mi).second;
-
     // Sort order, unrecorded transactions sort to the top
     status.sortKey = strprintf("%010d-%01d-%010u-%03d",
-        (pindex ? pindex->nHeight : std::numeric_limits<int>::max()),
-        (wtx.IsCoinBase() ? 1 : 0),
-        wtx.nTimeReceived,
+        wtx.block_height,
+        wtx.is_coinbase ? 1 : 0,
+        wtx.time_received,
         idx);
-    status.countsForBalance = wtx.IsTrusted() && !(wtx.GetBlocksToMaturity() > 0);
-    status.depth = wtx.GetDepthInMainChain();
-    status.cur_num_blocks = chainActive.Height();
+    status.countsForBalance = wtx.is_trusted && !(wtx.blocks_to_maturity > 0);
+    status.depth = wtx.depth_in_main_chain;
+    status.cur_num_blocks = numBlocks;
 
-    if (!CheckFinalTx(wtx))
+    if (!wtx.is_final)
     {
-        if (wtx.tx->nLockTime < LOCKTIME_THRESHOLD)
+        if (wtx.lock_time < LOCKTIME_THRESHOLD)
         {
             status.status = TransactionStatus::OpenUntilBlock;
-            status.open_for = wtx.tx->nLockTime - chainActive.Height();
+            status.open_for = wtx.lock_time - numBlocks;
         }
         else
         {
             status.status = TransactionStatus::OpenUntilDate;
-            status.open_for = wtx.tx->nLockTime;
+            status.open_for = wtx.lock_time;
         }
     }
     // For generated transactions, determine maturity
     else if(type == TransactionRecord::Generated)
     {
-        if (wtx.GetBlocksToMaturity() > 0)
+        if (wtx.blocks_to_maturity > 0)
         {
             status.status = TransactionStatus::Immature;
 
-            if (wtx.IsInMainChain())
+            if (wtx.is_in_main_chain)
             {
-                status.matures_in = wtx.GetBlocksToMaturity();
+                status.matures_in = wtx.blocks_to_maturity;
 
                 // Check if the block was requested by anyone
-                if (GetAdjustedTime() - wtx.nTimeReceived > 2 * 60 && wtx.GetRequestCount() == 0)
+                if (adjustedTime - wtx.time_received > 2 * 60 && wtx.request_count == 0)
                     status.status = TransactionStatus::MaturesWarning;
             }
             else
@@ -226,14 +216,14 @@ void TransactionRecord::updateStatus(const CWalletTx &wtx)
         {
             status.status = TransactionStatus::Conflicted;
         }
-        else if (GetAdjustedTime() - wtx.nTimeReceived > 2 * 60 && wtx.GetRequestCount() == 0)
+        else if (adjustedTime - wtx.time_received > 2 * 60 && wtx.request_count == 0)
         {
             status.status = TransactionStatus::Offline;
         }
         else if (status.depth == 0)
         {
             status.status = TransactionStatus::Unconfirmed;
-            if (wtx.isAbandoned())
+            if (wtx.is_abandoned)
                 status.status = TransactionStatus::Abandoned;
         }
         else if (status.depth < RecommendedNumConfirmations)
@@ -248,10 +238,9 @@ void TransactionRecord::updateStatus(const CWalletTx &wtx)
     status.needsUpdate = false;
 }
 
-bool TransactionRecord::statusUpdateNeeded()
+bool TransactionRecord::statusUpdateNeeded(int numBlocks)
 {
-    AssertLockHeld(cs_main);
-    return status.cur_num_blocks != chainActive.Height() || status.needsUpdate;
+    return status.cur_num_blocks != numBlocks || status.needsUpdate;
 }
 
 QString TransactionRecord::getTxID() const
diff --git a/src/qt/transactionrecord.h b/src/qt/transactionrecord.h
index 59f681224fc..1962503f064 100644
--- a/src/qt/transactionrecord.h
+++ b/src/qt/transactionrecord.h
@@ -11,8 +11,12 @@
 #include <QList>
 #include <QString>
 
-class CWallet;
-class CWalletTx;
+namespace ipc {
+class Node;
+class Wallet;
+struct WalletTx;
+struct WalletTxStatus;
+}
 
 /** UI model for transaction status. The transaction status is the part of a transaction that will change over time.
  */
@@ -106,8 +110,8 @@ class TransactionRecord
 
     /** Decompose CWallet transaction to model transaction records.
      */
-    static bool showTransaction(const CWalletTx &wtx);
-    static QList<TransactionRecord> decomposeTransaction(const CWallet *wallet, const CWalletTx &wtx);
+    static bool showTransaction();
+    static QList<TransactionRecord> decomposeTransaction(const ipc::WalletTx& wtx);
 
     /** @name Immutable transaction attributes
       @{*/
@@ -136,11 +140,11 @@ class TransactionRecord
 
     /** Update status from core wallet tx.
      */
-    void updateStatus(const CWalletTx &wtx);
+    void updateStatus(const ipc::WalletTxStatus& wtx, int numBlocks, int64_t adjustedTime);
 
     /** Return whether a status update is needed.
      */
-    bool statusUpdateNeeded();
+    bool statusUpdateNeeded(int numBlocks);
 };
 
 #endif // BITCOIN_QT_TRANSACTIONRECORD_H
diff --git a/src/qt/transactiontablemodel.cpp b/src/qt/transactiontablemodel.cpp
index 59cef555b1a..5588ebb15f6 100644
--- a/src/qt/transactiontablemodel.cpp
+++ b/src/qt/transactiontablemodel.cpp
@@ -14,11 +14,11 @@
 #include "walletmodel.h"
 
 #include "core_io.h"
+#include "ipc/interfaces.h"
 #include "validation.h"
 #include "sync.h"
 #include "uint256.h"
 #include "util.h"
-#include "wallet/wallet.h"
 
 #include <QColor>
 #include <QDateTime>
@@ -57,13 +57,11 @@ struct TxLessThan
 class TransactionTablePriv
 {
 public:
-    TransactionTablePriv(CWallet *_wallet, TransactionTableModel *_parent) :
-        wallet(_wallet),
+    TransactionTablePriv(TransactionTableModel *_parent) :
         parent(_parent)
     {
     }
 
-    CWallet *wallet;
     TransactionTableModel *parent;
 
     /* Local cache of wallet.
@@ -74,16 +72,15 @@ class TransactionTablePriv
 
     /* Query entire wallet anew from core.
      */
-    void refreshWallet()
+    void refreshWallet(ipc::Wallet& ipc_wallet)
     {
         qDebug() << "TransactionTablePriv::refreshWallet";
         cachedWallet.clear();
         {
-            LOCK2(cs_main, wallet->cs_wallet);
-            for(std::map<uint256, CWalletTx>::iterator it = wallet->mapWallet.begin(); it != wallet->mapWallet.end(); ++it)
-            {
-                if(TransactionRecord::showTransaction(it->second))
-                    cachedWallet.append(TransactionRecord::decomposeTransaction(wallet, it->second));
+            for (const auto& wtx : ipc_wallet.getWalletTxs()) {
+                if (TransactionRecord::showTransaction()) {
+                    cachedWallet.append(TransactionRecord::decomposeTransaction(wtx));
+                }
             }
         }
     }
@@ -93,7 +90,7 @@ class TransactionTablePriv
 
        Call with transaction that was added, removed or changed.
      */
-    void updateWallet(const uint256 &hash, int status, bool showTransaction)
+    void updateWallet(ipc::Wallet& ipc_wallet, const uint256 &hash, int status, bool showTransaction)
     {
         qDebug() << "TransactionTablePriv::updateWallet: " + QString::fromStdString(hash.ToString()) + " " + QString::number(status);
 
@@ -128,17 +125,16 @@ class TransactionTablePriv
             }
             if(showTransaction)
             {
-                LOCK2(cs_main, wallet->cs_wallet);
                 // Find transaction in wallet
-                std::map<uint256, CWalletTx>::iterator mi = wallet->mapWallet.find(hash);
-                if(mi == wallet->mapWallet.end())
+                ipc::WalletTx wtx = ipc_wallet.getWalletTx(hash);
+                if(!wtx.tx)
                 {
                     qWarning() << "TransactionTablePriv::updateWallet: Warning: Got CT_NEW, but transaction is not in wallet";
                     break;
                 }
                 // Added -- insert at the right position
                 QList<TransactionRecord> toInsert =
-                        TransactionRecord::decomposeTransaction(wallet, mi->second);
+                        TransactionRecord::decomposeTransaction(wtx);
                 if(!toInsert.isEmpty()) /* only if something to insert */
                 {
                     parent->beginInsertRows(QModelIndex(), lowerIndex, lowerIndex+toInsert.size()-1);
@@ -179,7 +175,7 @@ class TransactionTablePriv
         return cachedWallet.size();
     }
 
-    TransactionRecord *index(int idx)
+    TransactionRecord *index(ipc::Wallet& ipc_wallet, int idx)
     {
         if(idx >= 0 && idx < cachedWallet.size())
         {
@@ -192,61 +188,42 @@ class TransactionTablePriv
             // If a status update is needed (blocks came in since last check),
             //  update the status of this transaction from the wallet. Otherwise,
             // simply re-use the cached status.
-            TRY_LOCK(cs_main, lockMain);
-            if(lockMain)
-            {
-                TRY_LOCK(wallet->cs_wallet, lockWallet);
-                if(lockWallet && rec->statusUpdateNeeded())
-                {
-                    std::map<uint256, CWalletTx>::iterator mi = wallet->mapWallet.find(rec->hash);
-
-                    if(mi != wallet->mapWallet.end())
-                    {
-                        rec->updateStatus(mi->second);
-                    }
-                }
+            ipc::WalletTxStatus wtx;
+            int numBlocks;
+            int64_t adjustedTime;
+            if (ipc_wallet.tryGetTxStatus(rec->hash, wtx, numBlocks, adjustedTime) && rec->statusUpdateNeeded(numBlocks)) {
+                rec->updateStatus(wtx, numBlocks, adjustedTime);
             }
             return rec;
         }
         return 0;
     }
 
-    QString describe(TransactionRecord *rec, int unit)
+    QString describe(ipc::Node& ipc_node, ipc::Wallet& ipc_wallet, TransactionRecord *rec, int unit)
     {
-        {
-            LOCK2(cs_main, wallet->cs_wallet);
-            std::map<uint256, CWalletTx>::iterator mi = wallet->mapWallet.find(rec->hash);
-            if(mi != wallet->mapWallet.end())
-            {
-                return TransactionDesc::toHTML(wallet, mi->second, rec, unit);
-            }
-        }
-        return QString();
+        return TransactionDesc::toHTML(ipc_node, ipc_wallet, rec, unit);
     }
 
-    QString getTxHex(TransactionRecord *rec)
+    QString getTxHex(ipc::Wallet& ipc_wallet, TransactionRecord *rec)
     {
-        LOCK2(cs_main, wallet->cs_wallet);
-        std::map<uint256, CWalletTx>::iterator mi = wallet->mapWallet.find(rec->hash);
-        if(mi != wallet->mapWallet.end())
-        {
-            std::string strHex = EncodeHexTx(static_cast<CTransaction>(mi->second));
+        auto tx = ipc_wallet.getTx(rec->hash);
+        if (tx) {
+            std::string strHex = EncodeHexTx(*tx);
             return QString::fromStdString(strHex);
         }
         return QString();
     }
 };
 
-TransactionTableModel::TransactionTableModel(const PlatformStyle *_platformStyle, CWallet* _wallet, WalletModel *parent):
+TransactionTableModel::TransactionTableModel(const PlatformStyle *_platformStyle, WalletModel *parent):
         QAbstractTableModel(parent),
-        wallet(_wallet),
         walletModel(parent),
-        priv(new TransactionTablePriv(_wallet, this)),
+        priv(new TransactionTablePriv(this)),
         fProcessingQueuedTransactions(false),
         platformStyle(_platformStyle)
 {
     columns << QString() << QString() << tr("Date") << tr("Type") << tr("Label") << BitcoinUnits::getAmountColumnTitle(walletModel->getOptionsModel()->getDisplayUnit());
-    priv->refreshWallet();
+    priv->refreshWallet(walletModel->getIpcWallet());
 
     connect(walletModel->getOptionsModel(), SIGNAL(displayUnitChanged(int)), this, SLOT(updateDisplayUnit()));
 
@@ -271,7 +248,7 @@ void TransactionTableModel::updateTransaction(const QString &hash, int status, b
     uint256 updated;
     updated.SetHex(hash.toStdString());
 
-    priv->updateWallet(updated, status, showTransaction);
+    priv->updateWallet(walletModel->getIpcWallet(), updated, status, showTransaction);
 }
 
 void TransactionTableModel::updateConfirmations()
@@ -608,7 +585,7 @@ QVariant TransactionTableModel::data(const QModelIndex &index, int role) const
     case WatchonlyDecorationRole:
         return txWatchonlyDecoration(rec);
     case LongDescriptionRole:
-        return priv->describe(rec, walletModel->getOptionsModel()->getDisplayUnit());
+        return priv->describe(walletModel->getIpcNode(), walletModel->getIpcWallet(), rec, walletModel->getOptionsModel()->getDisplayUnit());
     case AddressRole:
         return QString::fromStdString(rec->address);
     case LabelRole:
@@ -620,7 +597,7 @@ QVariant TransactionTableModel::data(const QModelIndex &index, int role) const
     case TxHashRole:
         return QString::fromStdString(rec->hash.ToString());
     case TxHexRole:
-        return priv->getTxHex(rec);
+        return priv->getTxHex(walletModel->getIpcWallet(), rec);
     case TxPlainTextRole:
         {
             QString details;
@@ -696,10 +673,10 @@ QVariant TransactionTableModel::headerData(int section, Qt::Orientation orientat
 QModelIndex TransactionTableModel::index(int row, int column, const QModelIndex &parent) const
 {
     Q_UNUSED(parent);
-    TransactionRecord *data = priv->index(row);
+    TransactionRecord *data = priv->index(walletModel->getIpcWallet(), row);
     if(data)
     {
-        return createIndex(row, column, priv->index(row));
+        return createIndex(row, column, priv->index(walletModel->getIpcWallet(), row));
     }
     return QModelIndex();
 }
@@ -737,13 +714,11 @@ struct TransactionNotification
 static bool fQueueNotifications = false;
 static std::vector< TransactionNotification > vQueueNotifications;
 
-static void NotifyTransactionChanged(TransactionTableModel *ttm, CWallet *wallet, const uint256 &hash, ChangeType status)
+static void NotifyTransactionChanged(TransactionTableModel *ttm, const uint256 &hash, ChangeType status)
 {
     // Find transaction in wallet
-    std::map<uint256, CWalletTx>::iterator mi = wallet->mapWallet.find(hash);
     // Determine whether to show transaction or not (determine this here so that no relocking is needed in GUI thread)
-    bool inWallet = mi != wallet->mapWallet.end();
-    bool showTransaction = (inWallet && TransactionRecord::showTransaction(mi->second));
+    bool showTransaction = TransactionRecord::showTransaction();
 
     TransactionNotification notification(hash, status, showTransaction);
 
@@ -779,13 +754,13 @@ static void ShowProgress(TransactionTableModel *ttm, const std::string &title, i
 void TransactionTableModel::subscribeToCoreSignals()
 {
     // Connect signals to wallet
-    wallet->NotifyTransactionChanged.connect(boost::bind(NotifyTransactionChanged, this, _1, _2, _3));
-    wallet->ShowProgress.connect(boost::bind(ShowProgress, this, _1, _2));
+    m_handler_transaction_changed = walletModel->getIpcWallet().handleTransactionChanged(boost::bind(NotifyTransactionChanged, this, _1, _2));
+    m_handler_show_progress = walletModel->getIpcWallet().handleShowProgress(boost::bind(ShowProgress, this, _1, _2));
 }
 
 void TransactionTableModel::unsubscribeFromCoreSignals()
 {
     // Disconnect signals from wallet
-    wallet->NotifyTransactionChanged.disconnect(boost::bind(NotifyTransactionChanged, this, _1, _2, _3));
-    wallet->ShowProgress.disconnect(boost::bind(ShowProgress, this, _1, _2));
+    m_handler_transaction_changed->disconnect();
+    m_handler_show_progress->disconnect();
 }
diff --git a/src/qt/transactiontablemodel.h b/src/qt/transactiontablemodel.h
index 80aeb64c41d..a0c648559e9 100644
--- a/src/qt/transactiontablemodel.h
+++ b/src/qt/transactiontablemodel.h
@@ -10,13 +10,17 @@
 #include <QAbstractTableModel>
 #include <QStringList>
 
+#include <memory>
+
+namespace ipc {
+class Handler;
+}
+
 class PlatformStyle;
 class TransactionRecord;
 class TransactionTablePriv;
 class WalletModel;
 
-class CWallet;
-
 /** UI model for the transaction table of a wallet.
  */
 class TransactionTableModel : public QAbstractTableModel
@@ -24,7 +28,7 @@ class TransactionTableModel : public QAbstractTableModel
     Q_OBJECT
 
 public:
-    explicit TransactionTableModel(const PlatformStyle *platformStyle, CWallet* wallet, WalletModel *parent = 0);
+    explicit TransactionTableModel(const PlatformStyle *platformStyle, WalletModel *parent = 0);
     ~TransactionTableModel();
 
     enum ColumnIndex {
@@ -82,8 +86,9 @@ class TransactionTableModel : public QAbstractTableModel
     bool processingQueuedTransactions() { return fProcessingQueuedTransactions; }
 
 private:
-    CWallet* wallet;
     WalletModel *walletModel;
+    std::unique_ptr<ipc::Handler> m_handler_transaction_changed;
+    std::unique_ptr<ipc::Handler> m_handler_show_progress;
     QStringList columns;
     TransactionTablePriv *priv;
     bool fProcessingQueuedTransactions;
diff --git a/src/qt/transactionview.cpp b/src/qt/transactionview.cpp
index 53c38da9db3..2cbe70f3bc1 100644
--- a/src/qt/transactionview.cpp
+++ b/src/qt/transactionview.cpp
@@ -241,7 +241,7 @@ void TransactionView::setModel(WalletModel *_model)
         }
 
         // show/hide column Watch-only
-        updateWatchOnlyColumn(_model->haveWatchOnly());
+        updateWatchOnlyColumn(_model->getIpcWallet().haveWatchOnly());
 
         // Watch-only signal
         connect(_model, SIGNAL(notifyWatchonlyChanged(bool)), this, SLOT(updateWatchOnlyColumn(bool)));
@@ -353,7 +353,7 @@ void TransactionView::exportClicked()
     // name, column, role
     writer.setModel(transactionProxyModel);
     writer.addColumn(tr("Confirmed"), 0, TransactionTableModel::ConfirmedRole);
-    if (model && model->haveWatchOnly())
+    if (model && model->getIpcWallet().haveWatchOnly())
         writer.addColumn(tr("Watch-only"), TransactionTableModel::Watchonly);
     writer.addColumn(tr("Date"), 0, TransactionTableModel::DateRole);
     writer.addColumn(tr("Type"), TransactionTableModel::Type, Qt::EditRole);
@@ -382,8 +382,8 @@ void TransactionView::contextualMenu(const QPoint &point)
     // check if transaction can be abandoned, disable context menu action in case it doesn't
     uint256 hash;
     hash.SetHex(selection.at(0).data(TransactionTableModel::TxHashRole).toString().toStdString());
-    abandonAction->setEnabled(model->transactionCanBeAbandoned(hash));
-    bumpFeeAction->setEnabled(model->transactionCanBeBumped(hash));
+    abandonAction->setEnabled(model->getIpcWallet().transactionCanBeAbandoned(hash));
+    bumpFeeAction->setEnabled(model->getIpcWallet().transactionCanBeBumped(hash));
 
     if(index.isValid())
     {
@@ -403,7 +403,7 @@ void TransactionView::abandonTx()
     hash.SetHex(hashQStr.toStdString());
 
     // Abandon the wallet transaction over the walletModel
-    model->abandonTransaction(hash);
+    model->getIpcWallet().abandonTransaction(hash);
 
     // Update the table
     model->getTransactionTableModel()->updateTransaction(hashQStr, CT_UPDATED, false);
diff --git a/src/qt/utilitydialog.cpp b/src/qt/utilitydialog.cpp
index 5d8c23d13c1..a00a271fcc1 100644
--- a/src/qt/utilitydialog.cpp
+++ b/src/qt/utilitydialog.cpp
@@ -19,6 +19,7 @@
 
 #include "clientversion.h"
 #include "init.h"
+#include "ipc/interfaces.h"
 #include "util.h"
 
 #include <stdio.h>
@@ -31,7 +32,7 @@
 #include <QVBoxLayout>
 
 /** "Help message" or "About" dialog box */
-HelpMessageDialog::HelpMessageDialog(QWidget *parent, bool about) :
+HelpMessageDialog::HelpMessageDialog(ipc::Node& ipc_node, QWidget *parent, bool about) :
     QDialog(parent),
     ui(new Ui::HelpMessageDialog)
 {
@@ -77,7 +78,7 @@ HelpMessageDialog::HelpMessageDialog(QWidget *parent, bool about) :
         cursor.insertText(header);
         cursor.insertBlock();
 
-        std::string strUsage = HelpMessage(HMM_BITCOIN_QT);
+        std::string strUsage = ipc_node.helpMessage(HMM_BITCOIN_QT);
         const bool showDebug = gArgs.GetBoolArg("-help-debug", false);
         strUsage += HelpMessageGroup(tr("UI Options:").toStdString());
         if (showDebug) {
diff --git a/src/qt/utilitydialog.h b/src/qt/utilitydialog.h
index acaa864148c..5a4f1672472 100644
--- a/src/qt/utilitydialog.h
+++ b/src/qt/utilitydialog.h
@@ -10,6 +10,10 @@
 
 class BitcoinGUI;
 
+namespace ipc {
+    class Node;
+}
+
 namespace Ui {
     class HelpMessageDialog;
 }
@@ -20,7 +24,7 @@ class HelpMessageDialog : public QDialog
     Q_OBJECT
 
 public:
-    explicit HelpMessageDialog(QWidget *parent, bool about);
+    explicit HelpMessageDialog(ipc::Node& ipc_node, QWidget *parent, bool about);
     ~HelpMessageDialog();
 
     void printToConsole();
diff --git a/src/qt/walletmodel.cpp b/src/qt/walletmodel.cpp
index 3ca726d0f90..c7a99a3c45f 100644
--- a/src/qt/walletmodel.cpp
+++ b/src/qt/walletmodel.cpp
@@ -20,14 +20,11 @@
 #include "validation.h"
 #include "net.h" // for g_connman
 #include "policy/fees.h"
-#include "policy/rbf.h"
 #include "sync.h"
 #include "ui_interface.h"
 #include "util.h" // for GetBoolArg
 #include "wallet/coincontrol.h"
-#include "wallet/feebumper.h"
 #include "wallet/wallet.h"
-#include "wallet/walletdb.h" // for BackupWallet
 
 #include <stdint.h>
 
@@ -37,20 +34,19 @@
 #include <QTimer>
 
 
-WalletModel::WalletModel(const PlatformStyle *platformStyle, CWallet *_wallet, OptionsModel *_optionsModel, QObject *parent) :
-    QObject(parent), wallet(_wallet), optionsModel(_optionsModel), addressTableModel(0),
+WalletModel::WalletModel(std::unique_ptr<ipc::Wallet> _ipcWallet, ipc::Node& _ipcNode, const PlatformStyle *platformStyle, OptionsModel *_optionsModel, QObject *parent) :
+    QObject(parent), m_ipc_wallet(std::move(_ipcWallet)), m_ipc_node(_ipcNode), optionsModel(_optionsModel), addressTableModel(0),
     transactionTableModel(0),
     recentRequestsTableModel(0),
-    cachedBalance(0), cachedUnconfirmedBalance(0), cachedImmatureBalance(0),
     cachedEncryptionStatus(Unencrypted),
     cachedNumBlocks(0)
 {
-    fHaveWatchOnly = wallet->HaveWatchOnly();
+    fHaveWatchOnly = m_ipc_wallet->haveWatchOnly();
     fForceCheckBalanceChanged = false;
 
-    addressTableModel = new AddressTableModel(wallet, this);
-    transactionTableModel = new TransactionTableModel(platformStyle, wallet, this);
-    recentRequestsTableModel = new RecentRequestsTableModel(wallet, this);
+    addressTableModel = new AddressTableModel(this);
+    transactionTableModel = new TransactionTableModel(platformStyle, this);
+    recentRequestsTableModel = new RecentRequestsTableModel(this);
 
     // This timer will be fired repeatedly to update the balance
     pollTimer = new QTimer(this);
@@ -65,46 +61,6 @@ WalletModel::~WalletModel()
     unsubscribeFromCoreSignals();
 }
 
-CAmount WalletModel::getBalance(const CCoinControl *coinControl) const
-{
-    if (coinControl)
-    {
-        return wallet->GetAvailableBalance(coinControl);
-    }
-
-    return wallet->GetBalance();
-}
-
-CAmount WalletModel::getUnconfirmedBalance() const
-{
-    return wallet->GetUnconfirmedBalance();
-}
-
-CAmount WalletModel::getImmatureBalance() const
-{
-    return wallet->GetImmatureBalance();
-}
-
-bool WalletModel::haveWatchOnly() const
-{
-    return fHaveWatchOnly;
-}
-
-CAmount WalletModel::getWatchBalance() const
-{
-    return wallet->GetWatchOnlyBalance();
-}
-
-CAmount WalletModel::getWatchUnconfirmedBalance() const
-{
-    return wallet->GetUnconfirmedWatchOnlyBalance();
-}
-
-CAmount WalletModel::getWatchImmatureBalance() const
-{
-    return wallet->GetImmatureWatchOnlyBalance();
-}
-
 void WalletModel::updateStatus()
 {
     EncryptionStatus newEncryptionStatus = getEncryptionStatus();
@@ -118,52 +74,30 @@ void WalletModel::pollBalanceChanged()
     // Get required locks upfront. This avoids the GUI from getting stuck on
     // periodical polls if the core is holding the locks for a longer time -
     // for example, during a wallet rescan.
-    TRY_LOCK(cs_main, lockMain);
-    if(!lockMain)
-        return;
-    TRY_LOCK(wallet->cs_wallet, lockWallet);
-    if(!lockWallet)
+    ipc::WalletBalances new_balances;
+    int numBlocks = -1;
+    if (!m_ipc_wallet->tryGetBalances(new_balances, numBlocks)) {
         return;
+    }
 
-    if(fForceCheckBalanceChanged || chainActive.Height() != cachedNumBlocks)
+    if(fForceCheckBalanceChanged || m_ipc_node.getNumBlocks() != cachedNumBlocks)
     {
         fForceCheckBalanceChanged = false;
 
         // Balance and number of transactions might have changed
-        cachedNumBlocks = chainActive.Height();
+        cachedNumBlocks = m_ipc_node.getNumBlocks();
 
-        checkBalanceChanged();
+        checkBalanceChanged(new_balances);
         if(transactionTableModel)
             transactionTableModel->updateConfirmations();
     }
 }
 
-void WalletModel::checkBalanceChanged()
+void WalletModel::checkBalanceChanged(const ipc::WalletBalances& new_balances)
 {
-    CAmount newBalance = getBalance();
-    CAmount newUnconfirmedBalance = getUnconfirmedBalance();
-    CAmount newImmatureBalance = getImmatureBalance();
-    CAmount newWatchOnlyBalance = 0;
-    CAmount newWatchUnconfBalance = 0;
-    CAmount newWatchImmatureBalance = 0;
-    if (haveWatchOnly())
-    {
-        newWatchOnlyBalance = getWatchBalance();
-        newWatchUnconfBalance = getWatchUnconfirmedBalance();
-        newWatchImmatureBalance = getWatchImmatureBalance();
-    }
-
-    if(cachedBalance != newBalance || cachedUnconfirmedBalance != newUnconfirmedBalance || cachedImmatureBalance != newImmatureBalance ||
-        cachedWatchOnlyBalance != newWatchOnlyBalance || cachedWatchUnconfBalance != newWatchUnconfBalance || cachedWatchImmatureBalance != newWatchImmatureBalance)
-    {
-        cachedBalance = newBalance;
-        cachedUnconfirmedBalance = newUnconfirmedBalance;
-        cachedImmatureBalance = newImmatureBalance;
-        cachedWatchOnlyBalance = newWatchOnlyBalance;
-        cachedWatchUnconfBalance = newWatchUnconfBalance;
-        cachedWatchImmatureBalance = newWatchImmatureBalance;
-        Q_EMIT balanceChanged(newBalance, newUnconfirmedBalance, newImmatureBalance,
-                            newWatchOnlyBalance, newWatchUnconfBalance, newWatchImmatureBalance);
+    if(new_balances.balanceChanged(m_cached_balances)) {
+        m_cached_balances = new_balances;
+        Q_EMIT balanceChanged(new_balances.balance, new_balances.unconfirmed_balance, new_balances.immature_balance, new_balances.watch_only_balance, new_balances.unconfirmed_watch_only_balance, new_balances.immature_watch_only_balance);
     }
 }
 
@@ -259,7 +193,7 @@ WalletModel::SendCoinsReturn WalletModel::prepareTransaction(WalletModelTransact
         return DuplicateAddress;
     }
 
-    CAmount nBalance = getBalance(&coinControl);
+    CAmount nBalance = m_ipc_wallet->getAvailableBalance(coinControl);
 
     if(total > nBalance)
     {
@@ -267,22 +201,18 @@ WalletModel::SendCoinsReturn WalletModel::prepareTransaction(WalletModelTransact
     }
 
     {
-        LOCK2(cs_main, wallet->cs_wallet);
-
-        transaction.newPossibleKeyChange(wallet);
 
         CAmount nFeeRequired = 0;
         int nChangePosRet = -1;
         std::string strFailReason;
 
-        CWalletTx *newTx = transaction.getTransaction();
-        CReserveKey *keyChange = transaction.getPossibleKeyChange();
-        bool fCreated = wallet->CreateTransaction(vecSend, *newTx, *keyChange, nFeeRequired, nChangePosRet, strFailReason, coinControl);
+        auto& newTx = transaction.getWtx();
+        newTx = m_ipc_wallet->createTransaction(vecSend, coinControl, true /* sign */, nChangePosRet, nFeeRequired, strFailReason);
         transaction.setTransactionFee(nFeeRequired);
-        if (fSubtractFeeFromAmount && fCreated)
+        if (fSubtractFeeFromAmount && newTx)
             transaction.reassignAmounts(nChangePosRet);
 
-        if(!fCreated)
+        if(!newTx)
         {
             if(!fSubtractFeeFromAmount && (total + nFeeRequired) > nBalance)
             {
@@ -296,7 +226,7 @@ WalletModel::SendCoinsReturn WalletModel::prepareTransaction(WalletModelTransact
         // reject absurdly high fee. (This can never happen because the
         // wallet caps the fee at maxTxFee. This merely serves as a
         // belt-and-suspenders check)
-        if (nFeeRequired > maxTxFee)
+        if (nFeeRequired > m_ipc_node.getMaxTxFee())
             return AbsurdFee;
     }
 
@@ -308,9 +238,7 @@ WalletModel::SendCoinsReturn WalletModel::sendCoins(WalletModelTransaction &tran
     QByteArray transaction_array; /* store serialized transaction */
 
     {
-        LOCK2(cs_main, wallet->cs_wallet);
-        CWalletTx *newTx = transaction.getTransaction();
-
+        std::vector<std::pair<std::string, std::string>> vOrderForm;
         for (const SendCoinsRecipient &rcp : transaction.getRecipients())
         {
             if (rcp.paymentRequest.IsInitialized())
@@ -321,22 +249,21 @@ WalletModel::SendCoinsReturn WalletModel::sendCoins(WalletModelTransaction &tran
                 }
 
                 // Store PaymentRequests in wtx.vOrderForm in wallet.
-                std::string key("PaymentRequest");
                 std::string value;
                 rcp.paymentRequest.SerializeToString(&value);
-                newTx->vOrderForm.push_back(make_pair(key, value));
+                vOrderForm.emplace_back("PaymentRequest", std::move(value));
             }
             else if (!rcp.message.isEmpty()) // Message from normal bitcoin:URI (bitcoin:123...?message=example)
-                newTx->vOrderForm.push_back(make_pair("Message", rcp.message.toStdString()));
+                vOrderForm.emplace_back("Message", rcp.message.toStdString());
         }
 
-        CReserveKey *keyChange = transaction.getPossibleKeyChange();
-        CValidationState state;
-        if(!wallet->CommitTransaction(*newTx, *keyChange, g_connman.get(), state))
-            return SendCoinsReturn(TransactionCommitFailed, QString::fromStdString(state.GetRejectReason()));
+        auto& newTx = transaction.getWtx();
+        std::string rejectReason;
+        if (!newTx->commit({} /* mapValue */, std::move(vOrderForm), {} /* fromAccount */, rejectReason))
+            return SendCoinsReturn(TransactionCommitFailed, QString::fromStdString(rejectReason));
 
         CDataStream ssTx(SER_NETWORK, PROTOCOL_VERSION);
-        ssTx << *newTx->tx;
+        ssTx << newTx->get();
         transaction_array.append(&(ssTx[0]), ssTx.size());
     }
 
@@ -351,24 +278,22 @@ WalletModel::SendCoinsReturn WalletModel::sendCoins(WalletModelTransaction &tran
             CTxDestination dest = CBitcoinAddress(strAddress).Get();
             std::string strLabel = rcp.label.toStdString();
             {
-                LOCK(wallet->cs_wallet);
-
-                std::map<CTxDestination, CAddressBookData>::iterator mi = wallet->mapAddressBook.find(dest);
-
                 // Check if we have a new address or an updated label
-                if (mi == wallet->mapAddressBook.end())
+                std::string name;
+                if (!m_ipc_wallet->getAddress(dest, &name))
                 {
-                    wallet->SetAddressBook(dest, strLabel, "send");
+                    m_ipc_wallet->setAddressBook(dest, strLabel, "send");
                 }
-                else if (mi->second.name != strLabel)
+                else if (name != strLabel)
                 {
-                    wallet->SetAddressBook(dest, strLabel, ""); // "" means don't change purpose
+                    m_ipc_wallet->setAddressBook(dest, strLabel, ""); // "" means don't change purpose
                 }
             }
         }
-        Q_EMIT coinsSent(wallet, rcp, transaction_array);
+        Q_EMIT coinsSent(this, rcp, transaction_array);
     }
-    checkBalanceChanged(); // update balance immediately, otherwise there could be a short noticeable delay until pollBalanceChanged hits
+
+    checkBalanceChanged(m_ipc_wallet->getBalances()); // update balance immediately, otherwise there could be a short noticeable delay until pollBalanceChanged hits
 
     return SendCoinsReturn(OK);
 }
@@ -395,11 +320,11 @@ RecentRequestsTableModel *WalletModel::getRecentRequestsTableModel()
 
 WalletModel::EncryptionStatus WalletModel::getEncryptionStatus() const
 {
-    if(!wallet->IsCrypted())
+    if(!m_ipc_wallet->isCrypted())
     {
         return Unencrypted;
     }
-    else if(wallet->IsLocked())
+    else if(m_ipc_wallet->isLocked())
     {
         return Locked;
     }
@@ -414,7 +339,7 @@ bool WalletModel::setWalletEncrypted(bool encrypted, const SecureString &passphr
     if(encrypted)
     {
         // Encrypt
-        return wallet->EncryptWallet(passphrase);
+        return m_ipc_wallet->encryptWallet(passphrase);
     }
     else
     {
@@ -428,12 +353,12 @@ bool WalletModel::setWalletLocked(bool locked, const SecureString &passPhrase)
     if(locked)
     {
         // Lock
-        return wallet->Lock();
+        return m_ipc_wallet->lock();
     }
     else
     {
         // Unlock
-        return wallet->Unlock(passPhrase);
+        return m_ipc_wallet->unlock(passPhrase);
     }
 }
 
@@ -441,26 +366,20 @@ bool WalletModel::changePassphrase(const SecureString &oldPass, const SecureStri
 {
     bool retval;
     {
-        LOCK(wallet->cs_wallet);
-        wallet->Lock(); // Make sure wallet is locked before attempting pass change
-        retval = wallet->ChangeWalletPassphrase(oldPass, newPass);
+        m_ipc_wallet->lock(); // Make sure wallet is locked before attempting pass change
+        retval = m_ipc_wallet->changeWalletPassphrase(oldPass, newPass);
     }
     return retval;
 }
 
-bool WalletModel::backupWallet(const QString &filename)
-{
-    return wallet->BackupWallet(filename.toLocal8Bit().data());
-}
-
 // Handlers for core signals
-static void NotifyKeyStoreStatusChanged(WalletModel *walletmodel, CCryptoKeyStore *wallet)
+static void NotifyKeyStoreStatusChanged(WalletModel *walletmodel)
 {
     qDebug() << "NotifyKeyStoreStatusChanged";
     QMetaObject::invokeMethod(walletmodel, "updateStatus", Qt::QueuedConnection);
 }
 
-static void NotifyAddressBookChanged(WalletModel *walletmodel, CWallet *wallet,
+static void NotifyAddressBookChanged(WalletModel *walletmodel,
         const CTxDestination &address, const std::string &label, bool isMine,
         const std::string &purpose, ChangeType status)
 {
@@ -477,9 +396,8 @@ static void NotifyAddressBookChanged(WalletModel *walletmodel, CWallet *wallet,
                               Q_ARG(int, status));
 }
 
-static void NotifyTransactionChanged(WalletModel *walletmodel, CWallet *wallet, const uint256 &hash, ChangeType status)
+static void NotifyTransactionChanged(WalletModel *walletmodel, const uint256 &hash, ChangeType status)
 {
-    Q_UNUSED(wallet);
     Q_UNUSED(hash);
     Q_UNUSED(status);
     QMetaObject::invokeMethod(walletmodel, "updateTransaction", Qt::QueuedConnection);
@@ -502,21 +420,21 @@ static void NotifyWatchonlyChanged(WalletModel *walletmodel, bool fHaveWatchonly
 void WalletModel::subscribeToCoreSignals()
 {
     // Connect signals to wallet
-    wallet->NotifyStatusChanged.connect(boost::bind(&NotifyKeyStoreStatusChanged, this, _1));
-    wallet->NotifyAddressBookChanged.connect(boost::bind(NotifyAddressBookChanged, this, _1, _2, _3, _4, _5, _6));
-    wallet->NotifyTransactionChanged.connect(boost::bind(NotifyTransactionChanged, this, _1, _2, _3));
-    wallet->ShowProgress.connect(boost::bind(ShowProgress, this, _1, _2));
-    wallet->NotifyWatchonlyChanged.connect(boost::bind(NotifyWatchonlyChanged, this, _1));
+    m_handler_status_changed = m_ipc_wallet->handleStatusChanged(boost::bind(&NotifyKeyStoreStatusChanged, this));
+    m_handler_address_book_changed = m_ipc_wallet->handleAddressBookChanged(boost::bind(NotifyAddressBookChanged, this, _1, _2, _3, _4, _5));
+    m_handler_transaction_changed = m_ipc_wallet->handleTransactionChanged(boost::bind(NotifyTransactionChanged, this, _1, _2));
+    m_handler_show_progress = m_ipc_wallet->handleShowProgress(boost::bind(ShowProgress, this, _1, _2));
+    m_handler_watch_only_changed = m_ipc_wallet->handleWatchOnlyChanged(boost::bind(NotifyWatchonlyChanged, this, _1));
 }
 
 void WalletModel::unsubscribeFromCoreSignals()
 {
     // Disconnect signals from wallet
-    wallet->NotifyStatusChanged.disconnect(boost::bind(&NotifyKeyStoreStatusChanged, this, _1));
-    wallet->NotifyAddressBookChanged.disconnect(boost::bind(NotifyAddressBookChanged, this, _1, _2, _3, _4, _5, _6));
-    wallet->NotifyTransactionChanged.disconnect(boost::bind(NotifyTransactionChanged, this, _1, _2, _3));
-    wallet->ShowProgress.disconnect(boost::bind(ShowProgress, this, _1, _2));
-    wallet->NotifyWatchonlyChanged.disconnect(boost::bind(NotifyWatchonlyChanged, this, _1));
+    m_handler_status_changed->disconnect();
+    m_handler_address_book_changed->disconnect();
+    m_handler_transaction_changed->disconnect();
+    m_handler_show_progress->disconnect();
+    m_handler_watch_only_changed->disconnect();
 }
 
 // WalletModel::UnlockContext implementation
@@ -556,79 +474,9 @@ void WalletModel::UnlockContext::CopyFrom(const UnlockContext& rhs)
     rhs.relock = false;
 }
 
-bool WalletModel::getPubKey(const CKeyID &address, CPubKey& vchPubKeyOut) const
-{
-    return wallet->GetPubKey(address, vchPubKeyOut);
-}
-
-bool WalletModel::havePrivKey(const CKeyID &address) const
-{
-    return wallet->HaveKey(address);
-}
-
-bool WalletModel::getPrivKey(const CKeyID &address, CKey& vchPrivKeyOut) const
-{
-    return wallet->GetKey(address, vchPrivKeyOut);
-}
-
-// returns a list of COutputs from COutPoints
-void WalletModel::getOutputs(const std::vector<COutPoint>& vOutpoints, std::vector<COutput>& vOutputs)
-{
-    LOCK2(cs_main, wallet->cs_wallet);
-    for (const COutPoint& outpoint : vOutpoints)
-    {
-        if (!wallet->mapWallet.count(outpoint.hash)) continue;
-        int nDepth = wallet->mapWallet[outpoint.hash].GetDepthInMainChain();
-        if (nDepth < 0) continue;
-        COutput out(&wallet->mapWallet[outpoint.hash], outpoint.n, nDepth, true /* spendable */, true /* solvable */, true /* safe */);
-        vOutputs.push_back(out);
-    }
-}
-
-bool WalletModel::isSpent(const COutPoint& outpoint) const
-{
-    LOCK2(cs_main, wallet->cs_wallet);
-    return wallet->IsSpent(outpoint.hash, outpoint.n);
-}
-
-// AvailableCoins + LockedCoins grouped by wallet address (put change in one group with wallet address)
-void WalletModel::listCoins(std::map<QString, std::vector<COutput> >& mapCoins) const
-{
-    for (auto& group : wallet->ListCoins()) {
-        auto& resultGroup = mapCoins[QString::fromStdString(CBitcoinAddress(group.first).ToString())];
-        for (auto& coin : group.second) {
-            resultGroup.emplace_back(std::move(coin));
-        }
-    }
-}
-
-bool WalletModel::isLockedCoin(uint256 hash, unsigned int n) const
-{
-    LOCK2(cs_main, wallet->cs_wallet);
-    return wallet->IsLockedCoin(hash, n);
-}
-
-void WalletModel::lockCoin(COutPoint& output)
-{
-    LOCK2(cs_main, wallet->cs_wallet);
-    wallet->LockCoin(output);
-}
-
-void WalletModel::unlockCoin(COutPoint& output)
-{
-    LOCK2(cs_main, wallet->cs_wallet);
-    wallet->UnlockCoin(output);
-}
-
-void WalletModel::listLockedCoins(std::vector<COutPoint>& vOutpts)
-{
-    LOCK2(cs_main, wallet->cs_wallet);
-    wallet->ListLockedCoins(vOutpts);
-}
-
 void WalletModel::loadReceiveRequests(std::vector<std::string>& vReceiveRequests)
 {
-    vReceiveRequests = wallet->GetDestValues("rr"); // receive request
+    vReceiveRequests = m_ipc_wallet->getDestValues("rr"); // receive request
 }
 
 bool WalletModel::saveReceiveRequest(const std::string &sAddress, const int64_t nId, const std::string &sRequest)
@@ -639,52 +487,29 @@ bool WalletModel::saveReceiveRequest(const std::string &sAddress, const int64_t
     ss << nId;
     std::string key = "rr" + ss.str(); // "rr" prefix = "receive request" in destdata
 
-    LOCK(wallet->cs_wallet);
     if (sRequest.empty())
-        return wallet->EraseDestData(dest, key);
+        return m_ipc_wallet->eraseDestData(dest, key);
     else
-        return wallet->AddDestData(dest, key, sRequest);
-}
-
-bool WalletModel::transactionCanBeAbandoned(uint256 hash) const
-{
-    return wallet->TransactionCanBeAbandoned(hash);
-}
-
-bool WalletModel::abandonTransaction(uint256 hash) const
-{
-    LOCK2(cs_main, wallet->cs_wallet);
-    return wallet->AbandonTransaction(hash);
-}
-
-bool WalletModel::transactionCanBeBumped(uint256 hash) const
-{
-    LOCK2(cs_main, wallet->cs_wallet);
-    const CWalletTx *wtx = wallet->GetWalletTx(hash);
-    return wtx && SignalsOptInRBF(*wtx) && !wtx->mapValue.count("replaced_by_txid");
+        return m_ipc_wallet->addDestData(dest, key, sRequest);
 }
 
 bool WalletModel::bumpFee(uint256 hash)
 {
-    std::unique_ptr<CFeeBumper> feeBump;
-    {
-        CCoinControl coin_control;
-        coin_control.signalRbf = true;
-        LOCK2(cs_main, wallet->cs_wallet);
-        feeBump.reset(new CFeeBumper(wallet, hash, coin_control, 0));
-    }
-    if (feeBump->getResult() != BumpFeeResult::OK)
-    {
+    CCoinControl coin_control;
+    coin_control.signalRbf = true;
+    std::vector<std::string> errors;
+    CAmount oldFee;
+    CAmount newFee;
+    CMutableTransaction mtx;
+    if (!m_ipc_wallet->createBumpTransaction(hash, coin_control, 0 /* totalFee */, errors, oldFee, newFee, mtx)) {
         QMessageBox::critical(0, tr("Fee bump error"), tr("Increasing transaction fee failed") + "<br />(" +
-            (feeBump->getErrors().size() ? QString::fromStdString(feeBump->getErrors()[0]) : "") +")");
+            (errors.size() ? QString::fromStdString(errors[0]) : "") +")");
          return false;
     }
 
     // allow a user based fee verification
     QString questionString = tr("Do you want to increase the fee?");
     questionString.append("<br />");
-    CAmount oldFee = feeBump->getOldFee();
-    CAmount newFee = feeBump->getNewFee();
     questionString.append("<table style=\"text-align: left;\">");
     questionString.append("<tr><td>");
     questionString.append(tr("Current fee:"));
@@ -715,23 +540,15 @@ bool WalletModel::bumpFee(uint256 hash)
     }
 
     // sign bumped transaction
-    bool res = false;
-    {
-        LOCK2(cs_main, wallet->cs_wallet);
-        res = feeBump->signTransaction(wallet);
-    }
-    if (!res) {
+    if (!m_ipc_wallet->signBumpTransaction(mtx)) {
         QMessageBox::critical(0, tr("Fee bump error"), tr("Can't sign transaction."));
         return false;
     }
     // commit the bumped transaction
-    {
-        LOCK2(cs_main, wallet->cs_wallet);
-        res = feeBump->commit(wallet);
-    }
-    if(!res) {
+    uint256 txid;
+    if(!m_ipc_wallet->commitBumpTransaction(hash, std::move(mtx), errors, txid)) {
         QMessageBox::critical(0, tr("Fee bump error"), tr("Could not commit transaction") + "<br />(" +
-            QString::fromStdString(feeBump->getErrors()[0])+")");
+            QString::fromStdString(errors[0])+")");
          return false;
     }
     return true;
@@ -741,18 +558,3 @@ bool WalletModel::isWalletEnabled()
 {
    return !gArgs.GetBoolArg("-disablewallet", DEFAULT_DISABLE_WALLET);
 }
-
-bool WalletModel::hdEnabled() const
-{
-    return wallet->IsHDEnabled();
-}
-
-int WalletModel::getDefaultConfirmTarget() const
-{
-    return nTxConfirmTarget;
-}
-
-bool WalletModel::getDefaultWalletRbf() const
-{
-    return fWalletRbf;
-}
diff --git a/src/qt/walletmodel.h b/src/qt/walletmodel.h
index 6be36a57e25..17203091db1 100644
--- a/src/qt/walletmodel.h
+++ b/src/qt/walletmodel.h
@@ -8,6 +8,7 @@
 #include "paymentrequestplus.h"
 #include "walletmodeltransaction.h"
 
+#include "ipc/interfaces.h"
 #include "support/allocators/secure.h"
 
 #include <map>
@@ -27,7 +28,6 @@ class CKeyID;
 class COutPoint;
 class COutput;
 class CPubKey;
-class CWallet;
 class uint256;
 
 QT_BEGIN_NAMESPACE
@@ -100,7 +100,7 @@ class WalletModel : public QObject
     Q_OBJECT
 
 public:
-    explicit WalletModel(const PlatformStyle *platformStyle, CWallet *wallet, OptionsModel *optionsModel, QObject *parent = 0);
+    explicit WalletModel(std::unique_ptr<ipc::Wallet> ipc_wallet, ipc::Node& ipc_node, const PlatformStyle *platformStyle, OptionsModel *optionsModel, QObject *parent = 0);
     ~WalletModel();
 
     enum StatusCode // Returned by sendCoins
@@ -129,13 +129,6 @@ class WalletModel : public QObject
     TransactionTableModel *getTransactionTableModel();
     RecentRequestsTableModel *getRecentRequestsTableModel();
 
-    CAmount getBalance(const CCoinControl *coinControl = nullptr) const;
-    CAmount getUnconfirmedBalance() const;
-    CAmount getImmatureBalance() const;
-    bool haveWatchOnly() const;
-    CAmount getWatchBalance() const;
-    CAmount getWatchUnconfirmedBalance() const;
-    CAmount getWatchImmatureBalance() const;
     EncryptionStatus getEncryptionStatus() const;
 
     // Check address for validity
@@ -164,8 +157,6 @@ class WalletModel : public QObject
     // Passphrase only needed when unlocking
     bool setWalletLocked(bool locked, const SecureString &passPhrase=SecureString());
     bool changePassphrase(const SecureString &oldPass, const SecureString &newPass);
-    // Wallet backup
-    bool backupWallet(const QString &filename);
 
     // RAI object for unlocking wallet, returned by requestUnlock()
     class UnlockContext
@@ -189,37 +180,25 @@ class WalletModel : public QObject
 
     UnlockContext requestUnlock();
 
-    bool getPubKey(const CKeyID &address, CPubKey& vchPubKeyOut) const;
-    bool havePrivKey(const CKeyID &address) const;
-    bool getPrivKey(const CKeyID &address, CKey& vchPrivKeyOut) const;
-    void getOutputs(const std::vector<COutPoint>& vOutpoints, std::vector<COutput>& vOutputs);
-    bool isSpent(const COutPoint& outpoint) const;
-    void listCoins(std::map<QString, std::vector<COutput> >& mapCoins) const;
-
-    bool isLockedCoin(uint256 hash, unsigned int n) const;
-    void lockCoin(COutPoint& output);
-    void unlockCoin(COutPoint& output);
-    void listLockedCoins(std::vector<COutPoint>& vOutpts);
-
     void loadReceiveRequests(std::vector<std::string>& vReceiveRequests);
     bool saveReceiveRequest(const std::string &sAddress, const int64_t nId, const std::string &sRequest);
 
-    bool transactionCanBeAbandoned(uint256 hash) const;
-    bool abandonTransaction(uint256 hash) const;
-
-    bool transactionCanBeBumped(uint256 hash) const;
     bool bumpFee(uint256 hash);
 
     static bool isWalletEnabled();
 
-    bool hdEnabled() const;
-
-    int getDefaultConfirmTarget() const;
+    ipc::Node& getIpcNode() const { return m_ipc_node; }
 
-    bool getDefaultWalletRbf() const;
+    ipc::Wallet& getIpcWallet() const { return *m_ipc_wallet; }
 
 private:
-    CWallet *wallet;
+    std::unique_ptr<ipc::Wallet> m_ipc_wallet;
+    std::unique_ptr<ipc::Handler> m_handler_status_changed;
+    std::unique_ptr<ipc::Handler> m_handler_address_book_changed;
+    std::unique_ptr<ipc::Handler> m_handler_transaction_changed;
+    std::unique_ptr<ipc::Handler> m_handler_show_progress;
+    std::unique_ptr<ipc::Handler> m_handler_watch_only_changed;
+    ipc::Node& m_ipc_node;
     bool fHaveWatchOnly;
     bool fForceCheckBalanceChanged;
 
@@ -232,12 +211,7 @@ class WalletModel : public QObject
     RecentRequestsTableModel *recentRequestsTableModel;
 
     // Cache some values to be able to detect changes
-    CAmount cachedBalance;
-    CAmount cachedUnconfirmedBalance;
-    CAmount cachedImmatureBalance;
-    CAmount cachedWatchOnlyBalance;
-    CAmount cachedWatchUnconfBalance;
-    CAmount cachedWatchImmatureBalance;
+    ipc::WalletBalances m_cached_balances;
     EncryptionStatus cachedEncryptionStatus;
     int cachedNumBlocks;
 
@@ -245,7 +219,7 @@ class WalletModel : public QObject
 
     void subscribeToCoreSignals();
     void unsubscribeFromCoreSignals();
-    void checkBalanceChanged();
+    void checkBalanceChanged(const ipc::WalletBalances& new_balances);
 
 Q_SIGNALS:
     // Signal that balance in wallet changed
@@ -264,7 +238,7 @@ class WalletModel : public QObject
     void message(const QString &title, const QString &message, unsigned int style);
 
     // Coins sent: from wallet, to recipient, in (serialized) transaction:
-    void coinsSent(CWallet* wallet, SendCoinsRecipient recipient, QByteArray transaction);
+    void coinsSent(WalletModel* wallet, SendCoinsRecipient recipient, QByteArray transaction);
 
     // Show progress dialog e.g. for rescan
     void showProgress(const QString &title, int nProgress);
diff --git a/src/qt/walletmodeltransaction.cpp b/src/qt/walletmodeltransaction.cpp
index 8bc9ef725e4..7f74232013b 100644
--- a/src/qt/walletmodeltransaction.cpp
+++ b/src/qt/walletmodeltransaction.cpp
@@ -4,22 +4,17 @@
 
 #include "walletmodeltransaction.h"
 
+#include "ipc/interfaces.h"
 #include "policy/policy.h"
-#include "wallet/wallet.h"
 
 WalletModelTransaction::WalletModelTransaction(const QList<SendCoinsRecipient> &_recipients) :
     recipients(_recipients),
-    walletTransaction(0),
-    keyChange(0),
     fee(0)
 {
-    walletTransaction = new CWalletTx();
 }
 
 WalletModelTransaction::~WalletModelTransaction()
 {
-    delete keyChange;
-    delete walletTransaction;
 }
 
 QList<SendCoinsRecipient> WalletModelTransaction::getRecipients()
@@ -27,14 +22,14 @@ QList<SendCoinsRecipient> WalletModelTransaction::getRecipients()
     return recipients;
 }
 
-CWalletTx *WalletModelTransaction::getTransaction()
+std::unique_ptr<ipc::PendingWalletTx>& WalletModelTransaction::getWtx()
 {
-    return walletTransaction;
+    return wtx;
 }
 
 unsigned int WalletModelTransaction::getTransactionSize()
 {
-    return (!walletTransaction ? 0 : ::GetVirtualTransactionSize(*walletTransaction));
+    return wtx ? wtx->getVirtualSize() : 0;
 }
 
 CAmount WalletModelTransaction::getTransactionFee()
@@ -49,6 +44,7 @@ void WalletModelTransaction::setTransactionFee(const CAmount& newFee)
 
 void WalletModelTransaction::reassignAmounts(int nChangePosRet)
 {
+    const CTransaction* walletTransaction = &wtx->get();
     int i = 0;
     for (QList<SendCoinsRecipient>::iterator it = recipients.begin(); it != recipients.end(); ++it)
     {
@@ -64,7 +60,7 @@ void WalletModelTransaction::reassignAmounts(int nChangePosRet)
                 if (out.amount() <= 0) continue;
                 if (i == nChangePosRet)
                     i++;
-                subtotal += walletTransaction->tx->vout[i].nValue;
+                subtotal += walletTransaction->vout[i].nValue;
                 i++;
             }
             rcp.amount = subtotal;
@@ -73,7 +69,7 @@ void WalletModelTransaction::reassignAmounts(int nChangePosRet)
         {
             if (i == nChangePosRet)
                 i++;
-            rcp.amount = walletTransaction->tx->vout[i].nValue;
+            rcp.amount = walletTransaction->vout[i].nValue;
             i++;
         }
     }
@@ -88,13 +84,3 @@ CAmount WalletModelTransaction::getTotalTransactionAmount()
     }
     return totalTransactionAmount;
 }
-
-void WalletModelTransaction::newPossibleKeyChange(CWallet *wallet)
-{
-    keyChange = new CReserveKey(wallet);
-}
-
-CReserveKey *WalletModelTransaction::getPossibleKeyChange()
-{
-    return keyChange;
-}
diff --git a/src/qt/walletmodeltransaction.h b/src/qt/walletmodeltransaction.h
index 64922efada5..9b406b6a33b 100644
--- a/src/qt/walletmodeltransaction.h
+++ b/src/qt/walletmodeltransaction.h
@@ -11,9 +11,10 @@
 
 class SendCoinsRecipient;
 
-class CReserveKey;
-class CWallet;
-class CWalletTx;
+namespace ipc {
+class Node;
+class PendingWalletTx;
+}
 
 /** Data model for a walletmodel transaction. */
 class WalletModelTransaction
@@ -24,7 +25,7 @@ class WalletModelTransaction
 
     QList<SendCoinsRecipient> getRecipients();
 
-    CWalletTx *getTransaction();
+    std::unique_ptr<ipc::PendingWalletTx>& getWtx();
     unsigned int getTransactionSize();
 
     void setTransactionFee(const CAmount& newFee);
@@ -32,15 +33,11 @@ class WalletModelTransaction
 
     CAmount getTotalTransactionAmount();
 
-    void newPossibleKeyChange(CWallet *wallet);
-    CReserveKey *getPossibleKeyChange();
-
     void reassignAmounts(int nChangePosRet); // needed for the subtract-fee-from-amount feature
 
 private:
     QList<SendCoinsRecipient> recipients;
-    CWalletTx *walletTransaction;
-    CReserveKey *keyChange;
+    std::unique_ptr<ipc::PendingWalletTx> wtx;
     CAmount fee;
 };
 
diff --git a/src/qt/walletview.cpp b/src/qt/walletview.cpp
index 971f5e0e1a7..342e2c039f7 100644
--- a/src/qt/walletview.cpp
+++ b/src/qt/walletview.cpp
@@ -19,6 +19,7 @@
 #include "transactionview.h"
 #include "walletmodel.h"
 
+#include "ipc/interfaces.h"
 #include "ui_interface.h"
 
 #include <QAction>
@@ -135,7 +136,7 @@ void WalletView::setWalletModel(WalletModel *_walletModel)
         updateEncryptionStatus();
 
         // update HD status
-        Q_EMIT hdEnabledStatusChanged(_walletModel->hdEnabled());
+        Q_EMIT hdEnabledStatusChanged(_walletModel->getIpcWallet().hdEnabled());
 
         // Balloon pop-up for new transaction
         connect(_walletModel->getTransactionTableModel(), SIGNAL(rowsInserted(QModelIndex,int,int)),
@@ -152,7 +153,7 @@ void WalletView::setWalletModel(WalletModel *_walletModel)
 void WalletView::processNewTransaction(const QModelIndex& parent, int start, int /*end*/)
 {
     // Prevent balloon-spam when initial block download is in progress
-    if (!walletModel || !clientModel || clientModel->inInitialBlockDownload())
+    if (!walletModel || !clientModel || clientModel->getIpcNode().isInitialBlockDownload())
         return;
 
     TransactionTableModel *ttm = walletModel->getTransactionTableModel();
@@ -251,7 +252,7 @@ void WalletView::backupWallet()
     if (filename.isEmpty())
         return;
 
-    if (!walletModel->backupWallet(filename)) {
+    if (!walletModel->getIpcWallet().backupWallet(filename.toLocal8Bit().data())) {
         Q_EMIT message(tr("Backup Failed"), tr("There was an error trying to save the wallet data to %1.").arg(filename),
             CClientUIInterface::MSG_ERROR);
         }
diff --git a/src/validation.cpp b/src/validation.cpp
index 8bd23a0f1d7..af2ccaaeaac 100644
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -4374,7 +4374,7 @@ void DumpMempool(void)
 }
 
 //! Guess how far we are in the verification process at the given block index
-double GuessVerificationProgress(const ChainTxData& data, CBlockIndex *pindex) {
+double GuessVerificationProgress(const ChainTxData& data, const CBlockIndex *pindex) {
     if (pindex == nullptr)
         return 0.0;
 
diff --git a/src/validation.h b/src/validation.h
index edb8eab894b..e43eaaf84a6 100644
--- a/src/validation.h
+++ b/src/validation.h
@@ -276,7 +276,7 @@ bool ActivateBestChain(CValidationState& state, const CChainParams& chainparams,
 CAmount GetBlockSubsidy(int nHeight, const Consensus::Params& consensusParams);
 
 /** Guess verification progress (as a fraction between 0.0=genesis and 1.0=current tip). */
-double GuessVerificationProgress(const ChainTxData& data, CBlockIndex* pindex);
+double GuessVerificationProgress(const ChainTxData& data, const CBlockIndex* pindex);
 
 /**
  *  Mark one block file as pruned.
diff --git a/src/wallet/feebumper.cpp b/src/wallet/feebumper.cpp
index c1ea2b6290b..7ecf295117f 100644
--- a/src/wallet/feebumper.cpp
+++ b/src/wallet/feebumper.cpp
@@ -15,6 +15,7 @@
 #include "util.h"
 #include "net.h"
 
+namespace {
 // Calculate the size of the transaction assuming all signatures are max size
 // Use DummySignatureCreator, which inserts 72 byte signatures everywhere.
 // TODO: re-use this in CWallet::CreateTransaction (right now
@@ -42,11 +43,11 @@ int64_t CalculateMaximumSignedTxSize(const CTransaction &tx, const CWallet *pWal
     return GetVirtualTransactionSize(txNew);
 }
 
-bool CFeeBumper::preconditionChecks(const CWallet *pWallet, const CWalletTx& wtx) {
+BumpFeeResult PreconditionChecks(const CWallet* pWallet, const CWalletTx& wtx, std::vector<std::string>& vErrors)
+{
     if (pWallet->HasWalletSpend(wtx.GetHash())) {
         vErrors.push_back("Transaction has descendants in the wallet");
-        currentResult = BumpFeeResult::INVALID_PARAMETER;
-        return false;
+        return BumpFeeResult::INVALID_PARAMETER;
     }
 
     {
@@ -54,58 +55,63 @@ bool CFeeBumper::preconditionChecks(const CWallet *pWallet, const CWalletTx& wtx
         auto it_mp = mempool.mapTx.find(wtx.GetHash());
         if (it_mp != mempool.mapTx.end() && it_mp->GetCountWithDescendants() > 1) {
             vErrors.push_back("Transaction has descendants in the mempool");
-            currentResult = BumpFeeResult::INVALID_PARAMETER;
-            return false;
+            return BumpFeeResult::INVALID_PARAMETER;
         }
     }
 
     if (wtx.GetDepthInMainChain() != 0) {
         vErrors.push_back("Transaction has been mined, or is conflicted with a mined transaction");
-        currentResult = BumpFeeResult::WALLET_ERROR;
-        return false;
+        return BumpFeeResult::WALLET_ERROR;
     }
-    return true;
+    return BumpFeeResult::OK;
 }
+} // namespace
 
-CFeeBumper::CFeeBumper(const CWallet *pWallet, const uint256 txidIn, const CCoinControl& coin_control, CAmount totalFee)
-    :
-    txid(std::move(txidIn)),
-    nOldFee(0),
-    nNewFee(0)
+bool FeeBumper::TransactionCanBeBumped(CWallet* pWallet, const uint256& txid)
 {
+    LOCK2(cs_main, pWallet->cs_wallet);
+    const CWalletTx* wtx = pWallet->GetWalletTx(txid);
+    return wtx && SignalsOptInRBF(*wtx) && !wtx->mapValue.count("replaced_by_txid");
+}
+
+BumpFeeResult FeeBumper::CreateTransaction(const CWallet* pWallet,
+    const uint256& txid,
+    const CCoinControl& coin_control,
+    CAmount totalFee,
+    std::vector<std::string>& vErrors,
+    CAmount& nOldFee,
+    CAmount& nNewFee,
+    CMutableTransaction& mtx)
+{
+    LOCK2(cs_main, pWallet->cs_wallet);
     vErrors.clear();
-    bumpedTxid.SetNull();
-    AssertLockHeld(pWallet->cs_wallet);
     if (!pWallet->mapWallet.count(txid)) {
         vErrors.push_back("Invalid or non-wallet transaction id");
-        currentResult = BumpFeeResult::INVALID_ADDRESS_OR_KEY;
-        return;
+        return BumpFeeResult::INVALID_ADDRESS_OR_KEY;
     }
     auto it = pWallet->mapWallet.find(txid);
     const CWalletTx& wtx = it->second;
 
-    if (!preconditionChecks(pWallet, wtx)) {
-        return;
+    BumpFeeResult result = PreconditionChecks(pWallet, wtx, vErrors);
+    if (result != BumpFeeResult::OK) {
+        return result;
     }
 
     if (!SignalsOptInRBF(wtx)) {
         vErrors.push_back("Transaction is not BIP 125 replaceable");
-        currentResult = BumpFeeResult::WALLET_ERROR;
-        return;
+        return BumpFeeResult::WALLET_ERROR;
     }
 
     if (wtx.mapValue.count("replaced_by_txid")) {
         vErrors.push_back(strprintf("Cannot bump transaction %s which was already bumped by transaction %s", txid.ToString(), wtx.mapValue.at("replaced_by_txid")));
-        currentResult = BumpFeeResult::WALLET_ERROR;
-        return;
+        return BumpFeeResult::WALLET_ERROR;
     }
 
     // check that original tx consists entirely of our inputs
     // if not, we can't bump the fee, because the wallet has no way of knowing the value of the other inputs (thus the fee)
     if (!pWallet->IsAllFromMe(wtx, ISMINE_SPENDABLE)) {
         vErrors.push_back("Transaction contains inputs that don't belong to this wallet");
-        currentResult = BumpFeeResult::WALLET_ERROR;
-        return;
+        return BumpFeeResult::WALLET_ERROR;
     }
 
     // figure out which output was change
@@ -115,16 +121,14 @@ CFeeBumper::CFeeBumper(const CWallet *pWallet, const uint256 txidIn, const CCoin
         if (pWallet->IsChange(wtx.tx->vout[i])) {
             if (nOutput != -1) {
                 vErrors.push_back("Transaction has multiple change outputs");
-                currentResult = BumpFeeResult::WALLET_ERROR;
-                return;
+                return BumpFeeResult::WALLET_ERROR;
             }
             nOutput = i;
         }
     }
     if (nOutput == -1) {
         vErrors.push_back("Transaction does not have a change output");
-        currentResult = BumpFeeResult::WALLET_ERROR;
-        return;
+        return BumpFeeResult::WALLET_ERROR;
     }
 
     // Calculate the expected size of the new transaction.
@@ -132,8 +136,7 @@ CFeeBumper::CFeeBumper(const CWallet *pWallet, const uint256 txidIn, const CCoin
     const int64_t maxNewTxSize = CalculateMaximumSignedTxSize(*wtx.tx, pWallet);
     if (maxNewTxSize < 0) {
         vErrors.push_back("Transaction contains inputs that cannot be signed");
-        currentResult = BumpFeeResult::INVALID_ADDRESS_OR_KEY;
-        return;
+        return BumpFeeResult::INVALID_ADDRESS_OR_KEY;
     }
 
     // calculate the old fee and fee-rate
@@ -153,15 +156,13 @@ CFeeBumper::CFeeBumper(const CWallet *pWallet, const uint256 txidIn, const CCoin
         if (totalFee < minTotalFee) {
             vErrors.push_back(strprintf("Insufficient totalFee, must be at least %s (oldFee %s + incrementalFee %s)",
                                                                 FormatMoney(minTotalFee), FormatMoney(nOldFeeRate.GetFee(maxNewTxSize)), FormatMoney(::incrementalRelayFee.GetFee(maxNewTxSize))));
-            currentResult = BumpFeeResult::INVALID_PARAMETER;
-            return;
+            return BumpFeeResult::INVALID_PARAMETER;
         }
         CAmount requiredFee = CWallet::GetRequiredFee(maxNewTxSize);
         if (totalFee < requiredFee) {
             vErrors.push_back(strprintf("Insufficient totalFee (cannot be less than required fee %s)",
                                                                 FormatMoney(requiredFee)));
-            currentResult = BumpFeeResult::INVALID_PARAMETER;
-            return;
+            return BumpFeeResult::INVALID_PARAMETER;
         }
         nNewFee = totalFee;
         nNewFeeRate = CFeeRate(totalFee, maxNewTxSize);
@@ -184,8 +185,7 @@ CFeeBumper::CFeeBumper(const CWallet *pWallet, const uint256 txidIn, const CCoin
      if (nNewFee > maxTxFee) {
          vErrors.push_back(strprintf("Specified or calculated fee %s is too high (cannot be higher than maxTxFee %s)",
                                FormatMoney(nNewFee), FormatMoney(maxTxFee)));
-         currentResult = BumpFeeResult::WALLET_ERROR;
-         return;
+         return BumpFeeResult::WALLET_ERROR;
      }
 
     // check that fee rate is higher than mempool's minimum fee
@@ -196,8 +196,7 @@ CFeeBumper::CFeeBumper(const CWallet *pWallet, const uint256 txidIn, const CCoin
     CFeeRate minMempoolFeeRate = mempool.GetMinFee(gArgs.GetArg("-maxmempool", DEFAULT_MAX_MEMPOOL_SIZE) * 1000000);
     if (nNewFeeRate.GetFeePerK() < minMempoolFeeRate.GetFeePerK()) {
         vErrors.push_back(strprintf("New fee rate (%s) is less than the minimum fee rate (%s) to get into the mempool. totalFee value should to be at least %s or settxfee value should be at least %s to add transaction.", FormatMoney(nNewFeeRate.GetFeePerK()), FormatMoney(minMempoolFeeRate.GetFeePerK()), FormatMoney(minMempoolFeeRate.GetFee(maxNewTxSize)), FormatMoney(minMempoolFeeRate.GetFeePerK())));
-        currentResult = BumpFeeResult::WALLET_ERROR;
-        return;
+        return BumpFeeResult::WALLET_ERROR;
     }
 
     // Now modify the output to increase the fee.
@@ -208,8 +207,7 @@ CFeeBumper::CFeeBumper(const CWallet *pWallet, const uint256 txidIn, const CCoin
     CTxOut* poutput = &(mtx.vout[nOutput]);
     if (poutput->nValue < nDelta) {
         vErrors.push_back("Change output is too small to bump the fee");
-        currentResult = BumpFeeResult::WALLET_ERROR;
-        return;
+        return BumpFeeResult::WALLET_ERROR;
     }
 
     // If the output would become dust, discard it (converting the dust to fee)
@@ -227,30 +225,34 @@ CFeeBumper::CFeeBumper(const CWallet *pWallet, const uint256 txidIn, const CCoin
         }
     }
 
-    currentResult = BumpFeeResult::OK;
+    return BumpFeeResult::OK;
 }
 
-bool CFeeBumper::signTransaction(CWallet *pWallet)
-{
-     return pWallet->SignTransaction(mtx);
+bool FeeBumper::SignTransaction(CWallet* pWallet, CMutableTransaction& mtx) {
+    LOCK2(cs_main, pWallet->cs_wallet);
+    return pWallet->SignTransaction(mtx);
 }
 
-bool CFeeBumper::commit(CWallet *pWallet)
+BumpFeeResult FeeBumper::CommitTransaction(CWallet* pWallet,
+    const uint256& txid,
+    CMutableTransaction&& mtx,
+    std::vector<std::string>& vErrors,
+    uint256& bumpedTxid)
 {
-    AssertLockHeld(pWallet->cs_wallet);
-    if (!vErrors.empty() || currentResult != BumpFeeResult::OK) {
-        return false;
+    LOCK2(cs_main, pWallet->cs_wallet);
+    if (!vErrors.empty()) {
+        return BumpFeeResult::MISC_ERROR;
     }
     if (txid.IsNull() || !pWallet->mapWallet.count(txid)) {
         vErrors.push_back("Invalid or non-wallet transaction id");
-        currentResult = BumpFeeResult::MISC_ERROR;
-        return false;
+        return BumpFeeResult::MISC_ERROR;
     }
     CWalletTx& oldWtx = pWallet->mapWallet[txid];
 
     // make sure the transaction still has no descendants and hasn't been mined in the meantime
-    if (!preconditionChecks(pWallet, oldWtx)) {
-        return false;
+    BumpFeeResult result = PreconditionChecks(pWallet, oldWtx, vErrors);
+    if (result != BumpFeeResult::OK) {
+        return result;
     }
 
     CWalletTx wtxBumped(pWallet, MakeTransactionRef(std::move(mtx)));
@@ -266,7 +268,7 @@ bool CFeeBumper::commit(CWallet *pWallet)
     if (!pWallet->CommitTransaction(wtxBumped, reservekey, g_connman.get(), state)) {
         // NOTE: CommitTransaction never returns false, so this should never happen.
         vErrors.push_back(strprintf("Error: The transaction was rejected! Reason given: %s", state.GetRejectReason()));
-        return false;
+        return BumpFeeResult::WALLET_ERROR;
     }
 
     bumpedTxid = wtxBumped.GetHash();
@@ -284,6 +286,6 @@ bool CFeeBumper::commit(CWallet *pWallet)
         // replaced does not succeed for some reason.
         vErrors.push_back("Error: Created new bumpfee transaction but could not mark the original transaction as replaced.");
     }
-    return true;
+    return BumpFeeResult::OK;
 }
 
diff --git a/src/wallet/feebumper.h b/src/wallet/feebumper.h
index 3d64e53c15c..aa5b2dea60d 100644
--- a/src/wallet/feebumper.h
+++ b/src/wallet/feebumper.h
@@ -23,39 +23,38 @@ enum class BumpFeeResult
     MISC_ERROR,
 };
 
-class CFeeBumper
+class FeeBumper
 {
 public:
-    CFeeBumper(const CWallet *pWalletIn, const uint256 txidIn, const CCoinControl& coin_control, CAmount totalFee);
-    BumpFeeResult getResult() const { return currentResult; }
-    const std::vector<std::string>& getErrors() const { return vErrors; }
-    CAmount getOldFee() const { return nOldFee; }
-    CAmount getNewFee() const { return nNewFee; }
-    uint256 getBumpedTxId() const { return bumpedTxid; }
+    /* return whether transaction can be bumped */
+    static bool TransactionCanBeBumped(CWallet* pWallet, const uint256& txid);
+
+    /* create bumpfee transaction */
+    static BumpFeeResult CreateTransaction(const CWallet* pWallet,
+        const uint256& txid,
+        const CCoinControl& coin_control,
+        CAmount totalFee,
+        std::vector<std::string>& vErrors,
+        CAmount& nOldFee,
+        CAmount& nNewFee,
+        CMutableTransaction& mtx);
 
     /* signs the new transaction,
      * returns false if the tx couldn't be found or if it was
      * impossible to create the signature(s)
      */
-    bool signTransaction(CWallet *pWallet);
+    static bool SignTransaction(CWallet* pWallet, CMutableTransaction& mtx);
 
     /* commits the fee bump,
      * returns true, in case of CWallet::CommitTransaction was successful
      * but, eventually sets vErrors if the tx could not be added to the mempool (will try later)
      * or if the old transaction could not be marked as replaced
      */
-    bool commit(CWallet *pWalletNonConst);
-
-private:
-    bool preconditionChecks(const CWallet *pWallet, const CWalletTx& wtx);
-
-    const uint256 txid;
-    uint256 bumpedTxid;
-    CMutableTransaction mtx;
-    std::vector<std::string> vErrors;
-    BumpFeeResult currentResult;
-    CAmount nOldFee;
-    CAmount nNewFee;
+    static BumpFeeResult CommitTransaction(CWallet* pWallet,
+        const uint256& txid,
+        CMutableTransaction&& mtx,
+        std::vector<std::string>& vErrors,
+        uint256& bumpedTxid);
 };
 
 #endif // BITCOIN_WALLET_FEEBUMPER_H
diff --git a/src/wallet/rpcwallet.cpp b/src/wallet/rpcwallet.cpp
index a6176c3485e..bc0b5c6458e 100644
--- a/src/wallet/rpcwallet.cpp
+++ b/src/wallet/rpcwallet.cpp
@@ -3044,45 +3044,50 @@ UniValue bumpfee(const JSONRPCRequest& request)
     LOCK2(cs_main, pwallet->cs_wallet);
     EnsureWalletIsUnlocked(pwallet);
 
-    CFeeBumper feeBump(pwallet, hash, coin_control, totalFee);
-    BumpFeeResult res = feeBump.getResult();
+    std::vector<std::string> errors;
+    CAmount oldFee;
+    CAmount newFee;
+    CMutableTransaction mtx;
+    BumpFeeResult res = FeeBumper::CreateTransaction(pwallet, hash, coin_control, totalFee, errors, oldFee, newFee, mtx);
     if (res != BumpFeeResult::OK)
     {
         switch(res) {
             case BumpFeeResult::INVALID_ADDRESS_OR_KEY:
-                throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, feeBump.getErrors()[0]);
+                throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, errors[0]);
                 break;
             case BumpFeeResult::INVALID_REQUEST:
-                throw JSONRPCError(RPC_INVALID_REQUEST, feeBump.getErrors()[0]);
+                throw JSONRPCError(RPC_INVALID_REQUEST, errors[0]);
                 break;
             case BumpFeeResult::INVALID_PARAMETER:
-                throw JSONRPCError(RPC_INVALID_PARAMETER, feeBump.getErrors()[0]);
+                throw JSONRPCError(RPC_INVALID_PARAMETER, errors[0]);
                 break;
             case BumpFeeResult::WALLET_ERROR:
-                throw JSONRPCError(RPC_WALLET_ERROR, feeBump.getErrors()[0]);
+                throw JSONRPCError(RPC_WALLET_ERROR, errors[0]);
                 break;
             default:
-                throw JSONRPCError(RPC_MISC_ERROR, feeBump.getErrors()[0]);
+                throw JSONRPCError(RPC_MISC_ERROR, errors[0]);
                 break;
         }
     }
 
     // sign bumped transaction
-    if (!feeBump.signTransaction(pwallet)) {
+    if (!FeeBumper::SignTransaction(pwallet, mtx)) {
         throw JSONRPCError(RPC_WALLET_ERROR, "Can't sign transaction.");
     }
     // commit the bumped transaction
-    if(!feeBump.commit(pwallet)) {
-        throw JSONRPCError(RPC_WALLET_ERROR, feeBump.getErrors()[0]);
+    uint256 txid;
+    if (FeeBumper::CommitTransaction(pwallet, hash, std::move(mtx), errors, txid) != BumpFeeResult::OK) {
+        throw JSONRPCError(RPC_WALLET_ERROR, errors[0]);
     }
     UniValue result(UniValue::VOBJ);
-    result.push_back(Pair("txid", feeBump.getBumpedTxId().GetHex()));
-    result.push_back(Pair("origfee", ValueFromAmount(feeBump.getOldFee())));
-    result.push_back(Pair("fee", ValueFromAmount(feeBump.getNewFee())));
-    UniValue errors(UniValue::VARR);
-    for (const std::string& err: feeBump.getErrors())
-        errors.push_back(err);
-    result.push_back(Pair("errors", errors));
+    result.push_back(Pair("txid", txid.GetHex()));
+    result.push_back(Pair("origfee", ValueFromAmount(oldFee)));
+    result.push_back(Pair("fee", ValueFromAmount(newFee)));
+    UniValue result_errors(UniValue::VARR);
+    for (const std::string& error : errors) {
+        result_errors.push_back(error);
+    }
+    result.push_back(Pair("errors", result_errors));
 
     return result;
 }