diff --git a/src/httpserver.cpp b/src/httpserver.cpp
index 82fa572a35..c58e7e2a84 100644
--- a/src/httpserver.cpp
+++ b/src/httpserver.cpp
@@ -1,671 +1,659 @@
 // Copyright (c) 2015-2016 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 #include "httpserver.h"
 
 #include "chainparamsbase.h"
 #include "compat.h"
 #include "netbase.h"
 #include "rpc/protocol.h" // For HTTP status codes
 #include "sync.h"
 #include "ui_interface.h"
 #include "util.h"
 
 #include <signal.h>
 #include <sys/stat.h>
 #include <sys/types.h>
 
 #include <event2/buffer.h>
 #include <event2/event.h>
 #include <event2/http.h>
 #include <event2/keyvalq_struct.h>
 #include <event2/thread.h>
 #include <event2/util.h>
 
 #ifdef EVENT__HAVE_NETINET_IN_H
 #include <netinet/in.h>
 #ifdef _XOPEN_SOURCE_EXTENDED
 #include <arpa/inet.h>
 #endif
 #endif
 
 #include <cstdio>
 #include <cstdlib>
 #include <cstring>
 #include <future>
 
 /** Maximum size of http request (request line + headers) */
 static const size_t MAX_HEADERS_SIZE = 8192;
 
 /** HTTP request work item */
 class HTTPWorkItem final : public HTTPClosure {
 public:
     HTTPWorkItem(Config &_config, std::unique_ptr<HTTPRequest> _req,
                  const std::string &_path, const HTTPRequestHandler &_func)
         : req(std::move(_req)), path(_path), func(_func), config(&_config) {}
 
     void operator()() override { func(*config, req.get(), path); }
 
     std::unique_ptr<HTTPRequest> req;
 
 private:
     std::string path;
     HTTPRequestHandler func;
     Config *config;
 };
 
 /** Simple work queue for distributing work over multiple threads.
  * Work items are simply callable objects.
  */
 template <typename WorkItem> class WorkQueue {
 private:
     /** Mutex protects entire object */
     std::mutex cs;
     std::condition_variable cond;
     std::deque<std::unique_ptr<WorkItem>> queue;
     bool running;
     size_t maxDepth;
     int numThreads;
 
     /** RAII object to keep track of number of running worker threads */
     class ThreadCounter {
     public:
         WorkQueue &wq;
         ThreadCounter(WorkQueue &w) : wq(w) {
             std::lock_guard<std::mutex> lock(wq.cs);
             wq.numThreads += 1;
         }
         ~ThreadCounter() {
             std::lock_guard<std::mutex> lock(wq.cs);
             wq.numThreads -= 1;
             wq.cond.notify_all();
         }
     };
 
 public:
     WorkQueue(size_t _maxDepth)
         : running(true), maxDepth(_maxDepth), numThreads(0) {}
     /** Precondition: worker threads have all stopped
      * (call WaitExit)
      */
     ~WorkQueue() {}
     /** Enqueue a work item */
     bool Enqueue(WorkItem *item) {
         std::unique_lock<std::mutex> lock(cs);
         if (queue.size() >= maxDepth) {
             return false;
         }
         queue.emplace_back(std::unique_ptr<WorkItem>(item));
         cond.notify_one();
         return true;
     }
     /** Thread function */
     void Run() {
         ThreadCounter count(*this);
         while (true) {
             std::unique_ptr<WorkItem> i;
             {
                 std::unique_lock<std::mutex> lock(cs);
                 while (running && queue.empty())
                     cond.wait(lock);
                 if (!running) break;
                 i = std::move(queue.front());
                 queue.pop_front();
             }
             (*i)();
         }
     }
     /** Interrupt and exit loops */
     void Interrupt() {
         std::unique_lock<std::mutex> lock(cs);
         running = false;
         cond.notify_all();
     }
     /** Wait for worker threads to exit */
     void WaitExit() {
         std::unique_lock<std::mutex> lock(cs);
         while (numThreads > 0)
             cond.wait(lock);
     }
 
     /** Return current depth of queue */
     size_t Depth() {
         std::unique_lock<std::mutex> lock(cs);
         return queue.size();
     }
 };
 
 struct HTTPPathHandler {
     HTTPPathHandler() {}
     HTTPPathHandler(std::string _prefix, bool _exactMatch,
                     HTTPRequestHandler _handler)
         : prefix(_prefix), exactMatch(_exactMatch), handler(_handler) {}
     std::string prefix;
     bool exactMatch;
     HTTPRequestHandler handler;
 };
 
 /** HTTP module state */
 
 //! libevent event loop
 static struct event_base *eventBase = 0;
 //! HTTP server
 struct evhttp *eventHTTP = 0;
 //! List of subnets to allow RPC connections from
 static std::vector<CSubNet> rpc_allow_subnets;
 //! Work queue for handling longer requests off the event loop thread
 static WorkQueue<HTTPClosure> *workQueue = 0;
 //! Handlers for (sub)paths
 std::vector<HTTPPathHandler> pathHandlers;
 //! Bound listening sockets
 std::vector<evhttp_bound_socket *> boundSockets;
 
 /** Check if a network address is allowed to access the HTTP server */
 static bool ClientAllowed(const CNetAddr &netaddr) {
     if (!netaddr.IsValid()) return false;
     for (const CSubNet &subnet : rpc_allow_subnets)
         if (subnet.Match(netaddr)) return true;
     return false;
 }
 
 /** Initialize ACL list for HTTP server */
 static bool InitHTTPAllowList() {
     rpc_allow_subnets.clear();
     CNetAddr localv4;
     CNetAddr localv6;
     LookupHost("127.0.0.1", localv4, false);
     LookupHost("::1", localv6, false);
     // always allow IPv4 local subnet.
     rpc_allow_subnets.push_back(CSubNet(localv4, 8));
     // always allow IPv6 localhost.
     rpc_allow_subnets.push_back(CSubNet(localv6));
     if (gArgs.IsArgSet("-rpcallowip")) {
         for (const std::string &strAllow : gArgs.GetArgs("-rpcallowip")) {
             CSubNet subnet;
             LookupSubNet(strAllow.c_str(), subnet);
             if (!subnet.IsValid()) {
                 uiInterface.ThreadSafeMessageBox(
                     strprintf("Invalid -rpcallowip subnet specification: %s. "
                               "Valid are a single IP (e.g. 1.2.3.4), a "
                               "network/netmask (e.g. 1.2.3.4/255.255.255.0) or "
                               "a network/CIDR (e.g. 1.2.3.4/24).",
                               strAllow),
                     "", CClientUIInterface::MSG_ERROR);
                 return false;
             }
             rpc_allow_subnets.push_back(subnet);
         }
     }
     std::string strAllowed;
     for (const CSubNet &subnet : rpc_allow_subnets)
         strAllowed += subnet.ToString() + " ";
     LogPrint(BCLog::HTTP, "Allowing HTTP connections from: %s\n", strAllowed);
     return true;
 }
 
 /** HTTP request method as string - use for logging only */
 static std::string RequestMethodString(HTTPRequest::RequestMethod m) {
     switch (m) {
         case HTTPRequest::GET:
             return "GET";
             break;
         case HTTPRequest::POST:
             return "POST";
             break;
         case HTTPRequest::HEAD:
             return "HEAD";
             break;
         case HTTPRequest::PUT:
             return "PUT";
             break;
         default:
             return "unknown";
     }
 }
 
 /** HTTP request callback */
 static void http_request_cb(struct evhttp_request *req, void *arg) {
     Config &config = *reinterpret_cast<Config *>(arg);
 
     std::unique_ptr<HTTPRequest> hreq(new HTTPRequest(req));
 
     LogPrint(BCLog::HTTP, "Received a %s request for %s from %s\n",
              RequestMethodString(hreq->GetRequestMethod()), hreq->GetURI(),
              hreq->GetPeer().ToString());
 
     // Early address-based allow check
     if (!ClientAllowed(hreq->GetPeer())) {
         hreq->WriteReply(HTTP_FORBIDDEN);
         return;
     }
 
     // Early reject unknown HTTP methods
     if (hreq->GetRequestMethod() == HTTPRequest::UNKNOWN) {
         hreq->WriteReply(HTTP_BADMETHOD);
         return;
     }
 
     // Find registered handler for prefix
     std::string strURI = hreq->GetURI();
     std::string path;
     std::vector<HTTPPathHandler>::const_iterator i = pathHandlers.begin();
     std::vector<HTTPPathHandler>::const_iterator iend = pathHandlers.end();
     for (; i != iend; ++i) {
         bool match = false;
         if (i->exactMatch) {
             match = (strURI == i->prefix);
         } else {
             match = (strURI.substr(0, i->prefix.size()) == i->prefix);
         }
         if (match) {
             path = strURI.substr(i->prefix.size());
             break;
         }
     }
 
     // Dispatch to worker thread.
     if (i != iend) {
         std::unique_ptr<HTTPWorkItem> item(
             new HTTPWorkItem(config, std::move(hreq), path, i->handler));
         assert(workQueue);
         if (workQueue->Enqueue(item.get())) {
             /* if true, queue took ownership */
             item.release();
         } else {
             LogPrintf("WARNING: request rejected because http work queue depth "
                       "exceeded, it can be increased with the -rpcworkqueue= "
                       "setting\n");
             item->req->WriteReply(HTTP_INTERNAL, "Work queue depth exceeded");
         }
     } else {
         hreq->WriteReply(HTTP_NOTFOUND);
     }
 }
 
 /** Callback to reject HTTP requests after shutdown. */
 static void http_reject_request_cb(struct evhttp_request *req, void *) {
     LogPrint(BCLog::HTTP, "Rejecting request while shutting down\n");
     evhttp_send_error(req, HTTP_SERVUNAVAIL, nullptr);
 }
 
 /** Event dispatcher thread */
 static bool ThreadHTTP(struct event_base *base, struct evhttp *http) {
     RenameThread("bitcoin-http");
     LogPrint(BCLog::HTTP, "Entering http event loop\n");
     event_base_dispatch(base);
     // Event loop will be interrupted by InterruptHTTPServer()
     LogPrint(BCLog::HTTP, "Exited http event loop\n");
     return event_base_got_break(base) == 0;
 }
 
 /** Bind HTTP server to specified addresses */
 static bool HTTPBindAddresses(struct evhttp *http) {
     int defaultPort = GetArg("-rpcport", BaseParams().RPCPort());
     std::vector<std::pair<std::string, uint16_t>> endpoints;
 
     // Determine what addresses to bind to
     if (!IsArgSet("-rpcallowip")) {
         // Default to loopback if not allowing external IPs.
         endpoints.push_back(std::make_pair("::1", defaultPort));
         endpoints.push_back(std::make_pair("127.0.0.1", defaultPort));
         if (IsArgSet("-rpcbind")) {
             LogPrintf("WARNING: option -rpcbind was ignored because "
                       "-rpcallowip was not specified, refusing to allow "
                       "everyone to connect\n");
         }
     } else if (gArgs.IsArgSet("-rpcbind")) {
         // Specific bind address.
         for (const std::string &strRPCBind : gArgs.GetArgs("-rpcbind")) {
             int port = defaultPort;
             std::string host;
             SplitHostPort(strRPCBind, port, host);
             endpoints.push_back(std::make_pair(host, port));
         }
     } else {
         // No specific bind address specified, bind to any.
         endpoints.push_back(std::make_pair("::", defaultPort));
         endpoints.push_back(std::make_pair("0.0.0.0", defaultPort));
     }
 
     // Bind addresses
     for (std::vector<std::pair<std::string, uint16_t>>::iterator i =
              endpoints.begin();
          i != endpoints.end(); ++i) {
         LogPrint(BCLog::HTTP, "Binding RPC on address %s port %i\n", i->first,
                  i->second);
         evhttp_bound_socket *bind_handle = evhttp_bind_socket_with_handle(
             http, i->first.empty() ? nullptr : i->first.c_str(), i->second);
         if (bind_handle) {
             boundSockets.push_back(bind_handle);
         } else {
             LogPrintf("Binding RPC on address %s port %i failed.\n", i->first,
                       i->second);
         }
     }
     return !boundSockets.empty();
 }
 
 /** Simple wrapper to set thread name and run work queue */
 static void HTTPWorkQueueRun(WorkQueue<HTTPClosure> *queue) {
     RenameThread("bitcoin-httpworker");
     queue->Run();
 }
 
 /** libevent event log callback */
 static void libevent_log_cb(int severity, const char *msg) {
 #ifndef EVENT_LOG_WARN
 // EVENT_LOG_WARN was added in 2.0.19; but before then _EVENT_LOG_WARN existed.
 #define EVENT_LOG_WARN _EVENT_LOG_WARN
 #endif
     // Log warn messages and higher without debug category.
     if (severity >= EVENT_LOG_WARN) {
         LogPrintf("libevent: %s\n", msg);
     } else {
         LogPrint(BCLog::LIBEVENT, "libevent: %s\n", msg);
     }
 }
 
 bool InitHTTPServer(Config &config) {
     struct evhttp *http = 0;
     struct event_base *base = 0;
 
     if (!InitHTTPAllowList()) return false;
 
     if (GetBoolArg("-rpcssl", false)) {
         uiInterface.ThreadSafeMessageBox(
             "SSL mode for RPC (-rpcssl) is no longer supported.", "",
             CClientUIInterface::MSG_ERROR);
         return false;
     }
 
     // Redirect libevent's logging to our own log
     event_set_log_callback(&libevent_log_cb);
 #if LIBEVENT_VERSION_NUMBER >= 0x02010100
     // If -debug=libevent, set full libevent debugging.
     // Otherwise, disable all libevent debugging.
     if (LogAcceptCategory(BCLog::LIBEVENT)) {
         event_enable_debug_logging(EVENT_DBG_ALL);
     } else {
         event_enable_debug_logging(EVENT_DBG_NONE);
     }
 #endif
 #ifdef WIN32
     evthread_use_windows_threads();
 #else
     evthread_use_pthreads();
 #endif
 
     // XXX RAII
     base = event_base_new();
     if (!base) {
         LogPrintf("Couldn't create an event_base: exiting\n");
         return false;
     }
 
     /* Create a new evhttp object to handle requests. */
     // XXX RAII
     http = evhttp_new(base);
     if (!http) {
         LogPrintf("couldn't create evhttp. Exiting.\n");
         event_base_free(base);
         return false;
     }
 
     evhttp_set_timeout(
         http, GetArg("-rpcservertimeout", DEFAULT_HTTP_SERVER_TIMEOUT));
     evhttp_set_max_headers_size(http, MAX_HEADERS_SIZE);
     evhttp_set_max_body_size(http, MAX_SIZE);
     evhttp_set_gencb(http, http_request_cb, &config);
 
     if (!HTTPBindAddresses(http)) {
         LogPrintf("Unable to bind any endpoint for RPC server\n");
         evhttp_free(http);
         event_base_free(base);
         return false;
     }
 
     LogPrint(BCLog::HTTP, "Initialized HTTP server\n");
     int workQueueDepth =
         std::max((long)GetArg("-rpcworkqueue", DEFAULT_HTTP_WORKQUEUE), 1L);
     LogPrintf("HTTP: creating work queue of depth %d\n", workQueueDepth);
 
     workQueue = new WorkQueue<HTTPClosure>(workQueueDepth);
     eventBase = base;
     eventHTTP = http;
     return true;
 }
 
 std::thread threadHTTP;
 std::future<bool> threadResult;
 
 bool StartHTTPServer() {
     LogPrint(BCLog::HTTP, "Starting HTTP server\n");
     int rpcThreads =
         std::max((long)GetArg("-rpcthreads", DEFAULT_HTTP_THREADS), 1L);
     LogPrintf("HTTP: starting %d worker threads\n", rpcThreads);
     std::packaged_task<bool(event_base *, evhttp *)> task(ThreadHTTP);
     threadResult = task.get_future();
     threadHTTP = std::thread(std::move(task), eventBase, eventHTTP);
 
     for (int i = 0; i < rpcThreads; i++) {
         std::thread rpc_worker(HTTPWorkQueueRun, workQueue);
         rpc_worker.detach();
     }
     return true;
 }
 
 void InterruptHTTPServer() {
     LogPrint(BCLog::HTTP, "Interrupting HTTP server\n");
     if (eventHTTP) {
         // Unlisten sockets
         for (evhttp_bound_socket *socket : boundSockets) {
             evhttp_del_accept_socket(eventHTTP, socket);
         }
         // Reject requests on current connections
         evhttp_set_gencb(eventHTTP, http_reject_request_cb, nullptr);
     }
     if (workQueue) workQueue->Interrupt();
 }
 
 void StopHTTPServer() {
     LogPrint(BCLog::HTTP, "Stopping HTTP server\n");
     if (workQueue) {
         LogPrint(BCLog::HTTP, "Waiting for HTTP worker threads to exit\n");
         workQueue->WaitExit();
         delete workQueue;
     }
     if (eventBase) {
         LogPrint(BCLog::HTTP, "Waiting for HTTP event thread to exit\n");
         // Give event loop a few seconds to exit (to send back last RPC
         // responses), then break it. Before this was solved with
         // event_base_loopexit, but that didn't work as expected in at least
         // libevent 2.0.21 and always introduced a delay. In libevent master
         // that appears to be solved, so in the future that solution could be
         // used again (if desirable).
         // (see discussion in https://github.com/bitcoin/bitcoin/pull/6990)
         if (threadResult.valid() &&
             threadResult.wait_for(std::chrono::milliseconds(2000)) ==
                 std::future_status::timeout) {
             LogPrintf("HTTP event loop did not exit within allotted time, "
                       "sending loopbreak\n");
             event_base_loopbreak(eventBase);
         }
         threadHTTP.join();
     }
     if (eventHTTP) {
         evhttp_free(eventHTTP);
         eventHTTP = 0;
     }
     if (eventBase) {
         event_base_free(eventBase);
         eventBase = 0;
     }
     LogPrint(BCLog::HTTP, "Stopped HTTP server\n");
 }
 
 struct event_base *EventBase() {
     return eventBase;
 }
 
 static void httpevent_callback_fn(evutil_socket_t, short, void *data) {
     // Static handler: simply call inner handler
     HTTPEvent *self = ((HTTPEvent *)data);
     self->handler();
     if (self->deleteWhenTriggered) delete self;
 }
 
 HTTPEvent::HTTPEvent(struct event_base *base, bool _deleteWhenTriggered,
                      const std::function<void(void)> &_handler)
     : deleteWhenTriggered(_deleteWhenTriggered), handler(_handler) {
     ev = event_new(base, -1, 0, httpevent_callback_fn, this);
     assert(ev);
 }
 HTTPEvent::~HTTPEvent() {
     event_free(ev);
 }
 void HTTPEvent::trigger(struct timeval *tv) {
     if (tv == nullptr) {
         // Immediately trigger event in main thread.
         event_active(ev, 0, 0);
     } else {
         // Trigger after timeval passed.
         evtimer_add(ev, tv);
     }
 }
 HTTPRequest::HTTPRequest(struct evhttp_request *_req)
     : req(_req), replySent(false) {}
 HTTPRequest::~HTTPRequest() {
     if (!replySent) {
         // Keep track of whether reply was sent to avoid request leaks
         LogPrintf("%s: Unhandled request\n", __func__);
         WriteReply(HTTP_INTERNAL, "Unhandled request");
     }
     // evhttpd cleans up the request, as long as a reply was sent.
 }
 
 std::pair<bool, std::string> HTTPRequest::GetHeader(const std::string &hdr) {
     const struct evkeyvalq *headers = evhttp_request_get_input_headers(req);
     assert(headers);
     const char *val = evhttp_find_header(headers, hdr.c_str());
     if (val)
         return std::make_pair(true, val);
     else
         return std::make_pair(false, "");
 }
 
 std::string HTTPRequest::ReadBody() {
     struct evbuffer *buf = evhttp_request_get_input_buffer(req);
     if (!buf) return "";
     size_t size = evbuffer_get_length(buf);
     /** Trivial implementation: if this is ever a performance bottleneck,
      * internal copying can be avoided in multi-segment buffers by using
      * evbuffer_peek and an awkward loop. Though in that case, it'd be even
      * better to not copy into an intermediate string but use a stream
      * abstraction to consume the evbuffer on the fly in the parsing algorithm.
      */
     const char *data = (const char *)evbuffer_pullup(buf, size);
     // returns nullptr in case of empty buffer.
     if (!data) {
         return "";
     }
     std::string rv(data, size);
     evbuffer_drain(buf, size);
     return rv;
 }
 
 void HTTPRequest::WriteHeader(const std::string &hdr,
                               const std::string &value) {
     struct evkeyvalq *headers = evhttp_request_get_output_headers(req);
     assert(headers);
     evhttp_add_header(headers, hdr.c_str(), value.c_str());
 }
 
 /** Closure sent to main thread to request a reply to be sent to a HTTP request.
  * Replies must be sent in the main loop in the main http thread, this cannot be
  * done from worker threads.
  */
 void HTTPRequest::WriteReply(int nStatus, const std::string &strReply) {
     assert(!replySent && req);
     // Send event to main http thread to send reply message
     struct evbuffer *evb = evhttp_request_get_output_buffer(req);
     assert(evb);
     evbuffer_add(evb, strReply.data(), strReply.size());
     HTTPEvent *ev =
         new HTTPEvent(eventBase, true, std::bind(evhttp_send_reply, req,
                                                  nStatus, (const char *)nullptr,
                                                  (struct evbuffer *)nullptr));
     ev->trigger(0);
     replySent = true;
     // transferred back to main thread.
     req = 0;
 }
 
 CService HTTPRequest::GetPeer() {
     evhttp_connection *con = evhttp_request_get_connection(req);
     CService peer;
     if (con) {
         // evhttp retains ownership over returned address string
         const char *address = "";
         uint16_t port = 0;
         evhttp_connection_get_peer(con, (char **)&address, &port);
         peer = LookupNumeric(address, port);
     }
     return peer;
 }
 
 std::string HTTPRequest::GetURI() {
     return evhttp_request_get_uri(req);
 }
 
 HTTPRequest::RequestMethod HTTPRequest::GetRequestMethod() {
     switch (evhttp_request_get_command(req)) {
         case EVHTTP_REQ_GET:
             return GET;
             break;
         case EVHTTP_REQ_POST:
             return POST;
             break;
         case EVHTTP_REQ_HEAD:
             return HEAD;
             break;
         case EVHTTP_REQ_PUT:
             return PUT;
             break;
         default:
             return UNKNOWN;
             break;
     }
 }
 
 void RegisterHTTPHandler(const std::string &prefix, bool exactMatch,
                          const HTTPRequestHandler &handler) {
     LogPrint(BCLog::HTTP, "Registering HTTP handler for %s (exactmatch %d)\n",
              prefix, exactMatch);
     pathHandlers.push_back(HTTPPathHandler(prefix, exactMatch, handler));
 }
 
 void UnregisterHTTPHandler(const std::string &prefix, bool exactMatch) {
     std::vector<HTTPPathHandler>::iterator i = pathHandlers.begin();
     std::vector<HTTPPathHandler>::iterator iend = pathHandlers.end();
     for (; i != iend; ++i)
         if (i->prefix == prefix && i->exactMatch == exactMatch) break;
     if (i != iend) {
         LogPrint(BCLog::HTTP,
                  "Unregistering HTTP handler for %s (exactmatch %d)\n", prefix,
                  exactMatch);
         pathHandlers.erase(i);
     }
 }
-
-std::string urlDecode(const std::string &urlEncoded) {
-    std::string res;
-    if (!urlEncoded.empty()) {
-        char *decoded = evhttp_uridecode(urlEncoded.c_str(), false, nullptr);
-        if (decoded) {
-            res = std::string(decoded);
-            free(decoded);
-        }
-    }
-    return res;
-}
diff --git a/src/httpserver.h b/src/httpserver.h
index a8f62858e3..eb277dbdf2 100644
--- a/src/httpserver.h
+++ b/src/httpserver.h
@@ -1,152 +1,150 @@
 // Copyright (c) 2015-2016 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 #ifndef BITCOIN_HTTPSERVER_H
 #define BITCOIN_HTTPSERVER_H
 
 #include <cstdint>
 #include <functional>
 #include <string>
 
 static const int DEFAULT_HTTP_THREADS = 4;
 static const int DEFAULT_HTTP_WORKQUEUE = 16;
 static const int DEFAULT_HTTP_SERVER_TIMEOUT = 30;
 
 struct evhttp_request;
 struct event_base;
 
 class Config;
 class CService;
 class HTTPRequest;
 
 /** Initialize HTTP server.
  * Call this before RegisterHTTPHandler or EventBase().
  */
 bool InitHTTPServer(Config &config);
 /** Start HTTP server.
  * This is separate from InitHTTPServer to give users race-condition-free time
  * to register their handlers between InitHTTPServer and StartHTTPServer.
  */
 bool StartHTTPServer();
 /** Interrupt HTTP server threads */
 void InterruptHTTPServer();
 /** Stop HTTP server */
 void StopHTTPServer();
 
 /** Handler for requests to a certain HTTP path */
 typedef std::function<bool(Config &config, HTTPRequest *req,
                            const std::string &)>
     HTTPRequestHandler;
 /** Register handler for prefix.
  * If multiple handlers match a prefix, the first-registered one will
  * be invoked.
  */
 void RegisterHTTPHandler(const std::string &prefix, bool exactMatch,
                          const HTTPRequestHandler &handler);
 /** Unregister handler for prefix */
 void UnregisterHTTPHandler(const std::string &prefix, bool exactMatch);
 
 /** Return evhttp event base. This can be used by submodules to
  * queue timers or custom events.
  */
 struct event_base *EventBase();
 
 /** In-flight HTTP request.
  * Thin C++ wrapper around evhttp_request.
  */
 class HTTPRequest {
 private:
     struct evhttp_request *req;
     bool replySent;
 
 public:
     HTTPRequest(struct evhttp_request *req);
     ~HTTPRequest();
 
     enum RequestMethod { UNKNOWN, GET, POST, HEAD, PUT };
 
     /** Get requested URI.
      */
     std::string GetURI();
 
     /** Get CService (address:ip) for the origin of the http request.
      */
     CService GetPeer();
 
     /** Get request method.
      */
     RequestMethod GetRequestMethod();
 
     /**
      * Get the request header specified by hdr, or an empty string.
      * Return an pair (isPresent,string).
      */
     std::pair<bool, std::string> GetHeader(const std::string &hdr);
 
     /**
      * Read request body.
      *
      * @note As this consumes the underlying buffer, call this only once.
      * Repeated calls will return an empty string.
      */
     std::string ReadBody();
 
     /**
      * Write output header.
      *
      * @note call this before calling WriteErrorReply or Reply.
      */
     void WriteHeader(const std::string &hdr, const std::string &value);
 
     /**
      * Write HTTP reply.
      * nStatus is the HTTP status code to send.
      * strReply is the body of the reply. Keep it empty to send a standard
      * message.
      *
      * @note Can be called only once. As this will give the request back to the
      * main thread, do not call any other HTTPRequest methods after calling
      * this.
      */
     void WriteReply(int nStatus, const std::string &strReply = "");
 };
 
 /** Event handler closure.
  */
 class HTTPClosure {
 public:
     virtual void operator()() = 0;
     virtual ~HTTPClosure() {}
 };
 
 /** Event class. This can be used either as an cross-thread trigger or as a
  * timer.
  */
 class HTTPEvent {
 public:
     /** Create a new event.
      * deleteWhenTriggered deletes this event object after the event is
      * triggered (and the handler called)
      * handler is the handler to call when the event is triggered.
      */
     HTTPEvent(struct event_base *base, bool deleteWhenTriggered,
               const std::function<void(void)> &handler);
     ~HTTPEvent();
 
     /** Trigger the event. If tv is 0, trigger it immediately. Otherwise trigger
      * it after
      * the given time has elapsed.
      */
     void trigger(struct timeval *tv);
 
     bool deleteWhenTriggered;
     std::function<void(void)> handler;
 
 private:
     struct event *ev;
 };
 
-std::string urlDecode(const std::string &urlEncoded);
-
 #endif // BITCOIN_HTTPSERVER_H
diff --git a/src/wallet/CMakeLists.txt b/src/wallet/CMakeLists.txt
index d6b9035bdd..fb5b92007e 100644
--- a/src/wallet/CMakeLists.txt
+++ b/src/wallet/CMakeLists.txt
@@ -1,18 +1,26 @@
 # Copyright (c) 2017 The Bitcoin developers
 
 project(wallet)
 
 add_library(wallet
 	crypter.cpp
 	db.cpp
 	finaltx.cpp
 	rpcdump.cpp
 	rpcwallet.cpp
 	wallet.cpp
 	walletdb.cpp
 )
 
+target_link_libraries(wallet util univalue)
+
 # Add Berkeley DB dependency
 find_package(BerkeleyDB REQUIRED)
 target_include_directories(wallet PRIVATE ${BDB_INCLUDE_DIR})
-target_link_libraries(wallet util univalue ${BDBXX_LIBRARY} ${BDB_LIBRARY})
+target_link_libraries(wallet ${BDBXX_LIBRARY} ${BDB_LIBRARY})
+
+# Add event dependency. This is only required for evhttp_uridecode
+# in rpcwallet.cpp so it may be worth considering using an alternative.
+find_package(Event REQUIRED)
+target_include_directories(wallet PRIVATE ${EVENT_INCLUDE_DIR})
+target_link_libraries(wallet ${EVENT_LIBRARY})
diff --git a/src/wallet/rpcwallet.cpp b/src/wallet/rpcwallet.cpp
index f64f309018..1cc94285d9 100644
--- a/src/wallet/rpcwallet.cpp
+++ b/src/wallet/rpcwallet.cpp
@@ -1,3486 +1,3499 @@
 // Copyright (c) 2010 Satoshi Nakamoto
 // Copyright (c) 2009-2016 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 #include "amount.h"
 #include "chain.h"
 #include "chainparams.h" // for GetConsensus.
 #include "config.h"
 #include "consensus/validation.h"
 #include "core_io.h"
 #include "dstencode.h"
-#include "httpserver.h"
 #include "init.h"
 #include "net.h"
 #include "policy/fees.h"
 #include "policy/policy.h"
 #include "rpc/mining.h"
 #include "rpc/misc.h"
 #include "rpc/server.h"
 #include "timedata.h"
 #include "util.h"
 #include "utilmoneystr.h"
 #include "validation.h"
 #include "wallet.h"
 #include "walletdb.h"
 
 #include <univalue.h>
 
+#include <event2/http.h>
+
 static const std::string WALLET_ENDPOINT_BASE = "/wallet/";
 
+static std::string urlDecode(const std::string &urlEncoded) {
+    std::string res;
+    if (!urlEncoded.empty()) {
+        char *decoded = evhttp_uridecode(urlEncoded.c_str(), false, nullptr);
+        if (decoded) {
+            res = std::string(decoded);
+            free(decoded);
+        }
+    }
+    return res;
+}
+
 CWallet *GetWalletForJSONRPCRequest(const JSONRPCRequest &request) {
     if (request.URI.substr(0, WALLET_ENDPOINT_BASE.size()) ==
         WALLET_ENDPOINT_BASE) {
         // wallet endpoint was used
         std::string requestedWallet =
             urlDecode(request.URI.substr(WALLET_ENDPOINT_BASE.size()));
         for (CWalletRef pwallet : ::vpwallets) {
             if (pwallet->GetName() == requestedWallet) {
                 return pwallet;
             }
         }
         throw JSONRPCError(RPC_INVALID_PARAMETER,
                            "Requested wallet does not exist or is not loaded");
     }
     return ::vpwallets.size() == 1 || (request.fHelp && ::vpwallets.size() > 0)
                ? ::vpwallets[0]
                : nullptr;
 }
 
 std::string HelpRequiringPassphrase(CWallet *const pwallet) {
     return pwallet && pwallet->IsCrypted() ? "\nRequires wallet passphrase to "
                                              "be set with walletpassphrase "
                                              "call."
                                            : "";
 }
 
 bool EnsureWalletIsAvailable(CWallet *const pwallet, bool avoidException) {
     if (pwallet) {
         return true;
     }
 
     if (avoidException) {
         return false;
     }
 
     throw JSONRPCError(RPC_METHOD_NOT_FOUND, "Method not found (disabled)");
 }
 
 void EnsureWalletIsUnlocked(CWallet *const pwallet) {
     if (pwallet->IsLocked()) {
         throw JSONRPCError(RPC_WALLET_UNLOCK_NEEDED, "Error: Please enter the "
                                                      "wallet passphrase with "
                                                      "walletpassphrase first.");
     }
 }
 
 void WalletTxToJSON(const CWalletTx &wtx, UniValue &entry) {
     int confirms = wtx.GetDepthInMainChain();
     entry.push_back(Pair("confirmations", confirms));
     if (wtx.IsCoinBase()) {
         entry.push_back(Pair("generated", true));
     }
     if (confirms > 0) {
         entry.push_back(Pair("blockhash", wtx.hashBlock.GetHex()));
         entry.push_back(Pair("blockindex", wtx.nIndex));
         entry.push_back(
             Pair("blocktime", mapBlockIndex[wtx.hashBlock]->GetBlockTime()));
     } else {
         entry.push_back(Pair("trusted", wtx.IsTrusted()));
     }
     uint256 hash = wtx.GetId();
     entry.push_back(Pair("txid", hash.GetHex()));
     UniValue conflicts(UniValue::VARR);
     for (const uint256 &conflict : wtx.GetConflicts()) {
         conflicts.push_back(conflict.GetHex());
     }
     entry.push_back(Pair("walletconflicts", conflicts));
     entry.push_back(Pair("time", wtx.GetTxTime()));
     entry.push_back(Pair("timereceived", (int64_t)wtx.nTimeReceived));
 
     for (const std::pair<std::string, std::string> &item : wtx.mapValue) {
         entry.push_back(Pair(item.first, item.second));
     }
 }
 
 std::string AccountFromValue(const UniValue &value) {
     std::string strAccount = value.get_str();
     if (strAccount == "*") {
         throw JSONRPCError(RPC_WALLET_INVALID_ACCOUNT_NAME,
                            "Invalid account name");
     }
     return strAccount;
 }
 
 static UniValue getnewaddress(const Config &config,
                               const JSONRPCRequest &request) {
     CWallet *const pwallet = GetWalletForJSONRPCRequest(request);
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
     }
 
     if (request.fHelp || request.params.size() > 1) {
         throw std::runtime_error(
             "getnewaddress ( \"account\" )\n"
             "\nReturns a new Bitcoin address for receiving payments.\n"
             "If 'account' is specified (DEPRECATED), it is added to the "
             "address book \n"
             "so payments received with the address will be credited to "
             "'account'.\n"
             "\nArguments:\n"
             "1. \"account\"        (string, optional) DEPRECATED. The account "
             "name for the address to be linked to. If not provided, the "
             "default account \"\" is used. It can also be set to the empty "
             "string \"\" to represent the default account. The account does "
             "not need to exist, it will be created if there is no account by "
             "the given name.\n"
             "\nResult:\n"
             "\"address\"    (string) The new bitcoin address\n"
             "\nExamples:\n" +
             HelpExampleCli("getnewaddress", "") +
             HelpExampleRpc("getnewaddress", ""));
     }
 
     LOCK2(cs_main, pwallet->cs_wallet);
 
     // Parse the account first so we don't generate a key if there's an error
     std::string strAccount;
     if (request.params.size() > 0) {
         strAccount = AccountFromValue(request.params[0]);
     }
 
     if (!pwallet->IsLocked()) {
         pwallet->TopUpKeyPool();
     }
 
     // Generate a new key that is added to wallet
     CPubKey newKey;
     if (!pwallet->GetKeyFromPool(newKey)) {
         throw JSONRPCError(
             RPC_WALLET_KEYPOOL_RAN_OUT,
             "Error: Keypool ran out, please call keypoolrefill first");
     }
     CKeyID keyID = newKey.GetID();
 
     pwallet->SetAddressBook(keyID, strAccount, "receive");
 
     return EncodeDestination(keyID);
 }
 
 CTxDestination GetAccountAddress(CWallet *const pwallet, std::string strAccount,
                                  bool bForceNew = false) {
     CPubKey pubKey;
     if (!pwallet->GetAccountPubkey(pubKey, strAccount, bForceNew)) {
         throw JSONRPCError(
             RPC_WALLET_KEYPOOL_RAN_OUT,
             "Error: Keypool ran out, please call keypoolrefill first");
     }
 
     return pubKey.GetID();
 }
 
 static UniValue getaccountaddress(const Config &config,
                                   const JSONRPCRequest &request) {
     CWallet *const pwallet = GetWalletForJSONRPCRequest(request);
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
     }
 
     if (request.fHelp || request.params.size() != 1) {
         throw std::runtime_error(
             "getaccountaddress \"account\"\n"
             "\nDEPRECATED. Returns the current Bitcoin address for receiving "
             "payments to this account.\n"
             "\nArguments:\n"
             "1. \"account\"       (string, required) The account name for the "
             "address. It can also be set to the empty string \"\" to represent "
             "the default account. The account does not need to exist, it will "
             "be created and a new address created  if there is no account by "
             "the given name.\n"
             "\nResult:\n"
             "\"address\"          (string) The account bitcoin address\n"
             "\nExamples:\n" +
             HelpExampleCli("getaccountaddress", "") +
             HelpExampleCli("getaccountaddress", "\"\"") +
             HelpExampleCli("getaccountaddress", "\"myaccount\"") +
             HelpExampleRpc("getaccountaddress", "\"myaccount\""));
     }
 
     LOCK2(cs_main, pwallet->cs_wallet);
 
     // Parse the account first so we don't generate a key if there's an error
     std::string strAccount = AccountFromValue(request.params[0]);
 
     UniValue ret(UniValue::VSTR);
 
     ret = EncodeDestination(GetAccountAddress(pwallet, strAccount));
     return ret;
 }
 
 static UniValue getrawchangeaddress(const Config &config,
                                     const JSONRPCRequest &request) {
     CWallet *const pwallet = GetWalletForJSONRPCRequest(request);
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
     }
 
     if (request.fHelp || request.params.size() > 1) {
         throw std::runtime_error(
             "getrawchangeaddress\n"
             "\nReturns a new Bitcoin address, for receiving change.\n"
             "This is for use with raw transactions, NOT normal use.\n"
             "\nResult:\n"
             "\"address\"    (string) The address\n"
             "\nExamples:\n" +
             HelpExampleCli("getrawchangeaddress", "") +
             HelpExampleRpc("getrawchangeaddress", ""));
     }
 
     LOCK2(cs_main, pwallet->cs_wallet);
 
     if (!pwallet->IsLocked()) {
         pwallet->TopUpKeyPool();
     }
 
     CReserveKey reservekey(pwallet);
     CPubKey vchPubKey;
     if (!reservekey.GetReservedKey(vchPubKey, true)) {
         throw JSONRPCError(
             RPC_WALLET_KEYPOOL_RAN_OUT,
             "Error: Keypool ran out, please call keypoolrefill first");
     }
 
     reservekey.KeepKey();
 
     CKeyID keyID = vchPubKey.GetID();
 
     return EncodeDestination(keyID);
 }
 
 static UniValue setaccount(const Config &config,
                            const JSONRPCRequest &request) {
     CWallet *const pwallet = GetWalletForJSONRPCRequest(request);
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
     }
 
     if (request.fHelp || request.params.size() < 1 ||
         request.params.size() > 2) {
         throw std::runtime_error(
             "setaccount \"address\" \"account\"\n"
             "\nDEPRECATED. Sets the account associated with the given "
             "address.\n"
             "\nArguments:\n"
             "1. \"address\"         (string, required) The bitcoin address to "
             "be associated with an account.\n"
             "2. \"account\"         (string, required) The account to assign "
             "the address to.\n"
             "\nExamples:\n" +
             HelpExampleCli("setaccount",
                            "\"1D1ZrZNe3JUo7ZycKEYQQiQAWd9y54F4XX\" \"tabby\"") +
             HelpExampleRpc(
                 "setaccount",
                 "\"1D1ZrZNe3JUo7ZycKEYQQiQAWd9y54F4XX\", \"tabby\""));
     }
 
     LOCK2(cs_main, pwallet->cs_wallet);
 
     CTxDestination dest = DecodeDestination(request.params[0].get_str());
     if (!IsValidDestination(dest)) {
         throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY,
                            "Invalid Bitcoin address");
     }
 
     std::string strAccount;
     if (request.params.size() > 1) {
         strAccount = AccountFromValue(request.params[1]);
     }
 
     // Only add the account if the address is yours.
     if (IsMine(*pwallet, dest)) {
         // Detect when changing the account of an address that is the 'unused
         // current key' of another account:
         if (pwallet->mapAddressBook.count(dest)) {
             std::string strOldAccount = pwallet->mapAddressBook[dest].name;
             if (dest == GetAccountAddress(pwallet, strOldAccount)) {
                 GetAccountAddress(pwallet, strOldAccount, true);
             }
         }
 
         pwallet->SetAddressBook(dest, strAccount, "receive");
     } else {
         throw JSONRPCError(RPC_MISC_ERROR,
                            "setaccount can only be used with own address");
     }
 
     return NullUniValue;
 }
 
 static UniValue getaccount(const Config &config,
                            const JSONRPCRequest &request) {
     CWallet *const pwallet = GetWalletForJSONRPCRequest(request);
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
     }
 
     if (request.fHelp || request.params.size() != 1) {
         throw std::runtime_error(
             "getaccount \"address\"\n"
             "\nDEPRECATED. Returns the account associated with the given "
             "address.\n"
             "\nArguments:\n"
             "1. \"address\"         (string, required) The bitcoin address for "
             "account lookup.\n"
             "\nResult:\n"
             "\"accountname\"        (string) the account address\n"
             "\nExamples:\n" +
             HelpExampleCli("getaccount",
                            "\"1D1ZrZNe3JUo7ZycKEYQQiQAWd9y54F4XX\"") +
             HelpExampleRpc("getaccount",
                            "\"1D1ZrZNe3JUo7ZycKEYQQiQAWd9y54F4XX\""));
     }
 
     LOCK2(cs_main, pwallet->cs_wallet);
 
     CTxDestination dest = DecodeDestination(request.params[0].get_str());
     if (!IsValidDestination(dest)) {
         throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY,
                            "Invalid Bitcoin address");
     }
 
     std::string strAccount;
     std::map<CTxDestination, CAddressBookData>::iterator mi =
         pwallet->mapAddressBook.find(dest);
     if (mi != pwallet->mapAddressBook.end() && !(*mi).second.name.empty()) {
         strAccount = (*mi).second.name;
     }
 
     return strAccount;
 }
 
 static UniValue getaddressesbyaccount(const Config &config,
                                       const JSONRPCRequest &request) {
     CWallet *const pwallet = GetWalletForJSONRPCRequest(request);
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
     }
 
     if (request.fHelp || request.params.size() != 1) {
         throw std::runtime_error(
             "getaddressesbyaccount \"account\"\n"
             "\nDEPRECATED. Returns the list of addresses for the given "
             "account.\n"
             "\nArguments:\n"
             "1. \"account\"        (string, required) The account name.\n"
             "\nResult:\n"
             "[                     (json array of string)\n"
             "  \"address\"         (string) a bitcoin address associated with "
             "the given account\n"
             "  ,...\n"
             "]\n"
             "\nExamples:\n" +
             HelpExampleCli("getaddressesbyaccount", "\"tabby\"") +
             HelpExampleRpc("getaddressesbyaccount", "\"tabby\""));
     }
 
     LOCK2(cs_main, pwallet->cs_wallet);
 
     std::string strAccount = AccountFromValue(request.params[0]);
 
     // Find all addresses that have the given account
     UniValue ret(UniValue::VARR);
     for (const std::pair<CTxDestination, CAddressBookData> &item :
          pwallet->mapAddressBook) {
         const CTxDestination &dest = item.first;
         const std::string &strName = item.second.name;
         if (strName == strAccount) {
             ret.push_back(EncodeDestination(dest));
         }
     }
 
     return ret;
 }
 
 static void SendMoney(CWallet *const pwallet, const CTxDestination &address,
                       Amount nValue, bool fSubtractFeeFromAmount,
                       CWalletTx &wtxNew) {
     Amount curBalance = pwallet->GetBalance();
 
     // Check amount
     if (nValue <= Amount(0)) {
         throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid amount");
     }
 
     if (nValue > curBalance) {
         throw JSONRPCError(RPC_WALLET_INSUFFICIENT_FUNDS, "Insufficient funds");
     }
 
     if (pwallet->GetBroadcastTransactions() && !g_connman) {
         throw JSONRPCError(
             RPC_CLIENT_P2P_DISABLED,
             "Error: Peer-to-peer functionality missing or disabled");
     }
 
     // Parse Bitcoin address
     CScript scriptPubKey = GetScriptForDestination(address);
 
     // Create and send the transaction
     CReserveKey reservekey(pwallet);
     Amount nFeeRequired;
     std::string strError;
     std::vector<CRecipient> vecSend;
     int nChangePosRet = -1;
     CRecipient recipient = {scriptPubKey, nValue, fSubtractFeeFromAmount};
     vecSend.push_back(recipient);
 
     if (!pwallet->CreateTransaction(vecSend, wtxNew, reservekey, nFeeRequired,
                                     nChangePosRet, strError)) {
         if (!fSubtractFeeFromAmount && nValue + nFeeRequired > curBalance) {
             strError = strprintf("Error: This transaction requires a "
                                  "transaction fee of at least %s",
                                  FormatMoney(nFeeRequired));
         }
         throw JSONRPCError(RPC_WALLET_ERROR, strError);
     }
     CValidationState state;
     if (!pwallet->CommitTransaction(wtxNew, reservekey, g_connman.get(),
                                     state)) {
         strError =
             strprintf("Error: The transaction was rejected! Reason given: %s",
                       state.GetRejectReason());
         throw JSONRPCError(RPC_WALLET_ERROR, strError);
     }
 }
 
 static UniValue sendtoaddress(const Config &config,
                               const JSONRPCRequest &request) {
     CWallet *const pwallet = GetWalletForJSONRPCRequest(request);
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
     }
 
     if (request.fHelp || request.params.size() < 2 ||
         request.params.size() > 5) {
         throw std::runtime_error(
             "sendtoaddress \"address\" amount ( \"comment\" \"comment_to\" "
             "subtractfeefromamount )\n"
             "\nSend an amount to a given address.\n" +
             HelpRequiringPassphrase(pwallet) +
             "\nArguments:\n"
             "1. \"address\"            (string, required) The bitcoin address "
             "to send to.\n"
             "2. \"amount\"             (numeric or string, required) The "
             "amount in " +
             CURRENCY_UNIT +
             " to send. eg 0.1\n"
             "3. \"comment\"            (string, optional) A comment used to "
             "store what the transaction is for. \n"
             "                             This is not part of the transaction, "
             "just kept in your wallet.\n"
             "4. \"comment_to\"         (string, optional) A comment to store "
             "the name of the person or organization \n"
             "                             to which you're sending the "
             "transaction. This is not part of the \n"
             "                             transaction, just kept in your "
             "wallet.\n"
             "5. subtractfeefromamount  (boolean, optional, default=false) The "
             "fee will be deducted from the amount being sent.\n"
             "                             The recipient will receive less "
             "bitcoins than you enter in the amount field.\n"
             "\nResult:\n"
             "\"txid\"                  (string) The transaction id.\n"
             "\nExamples:\n" +
             HelpExampleCli("sendtoaddress",
                            "\"1M72Sfpbz1BPpXFHz9m3CdqATR44Jvaydd\" 0.1") +
             HelpExampleCli("sendtoaddress", "\"1M72Sfpbz1BPpXFHz9m3CdqATR44Jvay"
                                             "dd\" 0.1 \"donation\" \"seans "
                                             "outpost\"") +
             HelpExampleCli(
                 "sendtoaddress",
                 "\"1M72Sfpbz1BPpXFHz9m3CdqATR44Jvaydd\" 0.1 \"\" \"\" true") +
             HelpExampleRpc("sendtoaddress", "\"1M72Sfpbz1BPpXFHz9m3CdqATR44Jvay"
                                             "dd\", 0.1, \"donation\", \"seans "
                                             "outpost\""));
     }
 
     LOCK2(cs_main, pwallet->cs_wallet);
 
     CTxDestination dest = DecodeDestination(request.params[0].get_str());
     if (!IsValidDestination(dest)) {
         throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid address");
     }
 
     // Amount
     Amount nAmount = AmountFromValue(request.params[1]);
     if (nAmount <= Amount(0)) {
         throw JSONRPCError(RPC_TYPE_ERROR, "Invalid amount for send");
     }
 
     // Wallet comments
     CWalletTx wtx;
     if (request.params.size() > 2 && !request.params[2].isNull() &&
         !request.params[2].get_str().empty()) {
         wtx.mapValue["comment"] = request.params[2].get_str();
     }
     if (request.params.size() > 3 && !request.params[3].isNull() &&
         !request.params[3].get_str().empty()) {
         wtx.mapValue["to"] = request.params[3].get_str();
     }
 
     bool fSubtractFeeFromAmount = false;
     if (request.params.size() > 4) {
         fSubtractFeeFromAmount = request.params[4].get_bool();
     }
 
     EnsureWalletIsUnlocked(pwallet);
 
     SendMoney(pwallet, dest, nAmount, fSubtractFeeFromAmount, wtx);
 
     return wtx.GetId().GetHex();
 }
 
 static UniValue listaddressgroupings(const Config &config,
                                      const JSONRPCRequest &request) {
     CWallet *const pwallet = GetWalletForJSONRPCRequest(request);
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
     }
 
     if (request.fHelp) {
         throw std::runtime_error(
             "listaddressgroupings\n"
             "\nLists groups of addresses which have had their common "
             "ownership\n"
             "made public by common use as inputs or as the resulting change\n"
             "in past transactions\n"
             "\nResult:\n"
             "[\n"
             "  [\n"
             "    [\n"
             "      \"address\",            (string) The bitcoin address\n"
             "      amount,                 (numeric) The amount in " +
             CURRENCY_UNIT + "\n"
                             "      \"account\"             (string, optional) "
                             "DEPRECATED. The account\n"
                             "    ]\n"
                             "    ,...\n"
                             "  ]\n"
                             "  ,...\n"
                             "]\n"
                             "\nExamples:\n" +
             HelpExampleCli("listaddressgroupings", "") +
             HelpExampleRpc("listaddressgroupings", ""));
     }
 
     LOCK2(cs_main, pwallet->cs_wallet);
 
     UniValue jsonGroupings(UniValue::VARR);
     std::map<CTxDestination, Amount> balances = pwallet->GetAddressBalances();
     for (const std::set<CTxDestination> &grouping :
          pwallet->GetAddressGroupings()) {
         UniValue jsonGrouping(UniValue::VARR);
         for (const CTxDestination &address : grouping) {
             UniValue addressInfo(UniValue::VARR);
             addressInfo.push_back(EncodeDestination(address));
             addressInfo.push_back(ValueFromAmount(balances[address]));
 
             if (pwallet->mapAddressBook.find(address) !=
                 pwallet->mapAddressBook.end()) {
                 addressInfo.push_back(
                     pwallet->mapAddressBook.find(address)->second.name);
             }
             jsonGrouping.push_back(addressInfo);
         }
         jsonGroupings.push_back(jsonGrouping);
     }
 
     return jsonGroupings;
 }
 
 static UniValue signmessage(const Config &config,
                             const JSONRPCRequest &request) {
     CWallet *const pwallet = GetWalletForJSONRPCRequest(request);
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
     }
 
     if (request.fHelp || request.params.size() != 2) {
         throw std::runtime_error(
             "signmessage \"address\" \"message\"\n"
             "\nSign a message with the private key of an address" +
             HelpRequiringPassphrase(pwallet) +
             "\n"
             "\nArguments:\n"
             "1. \"address\"         (string, required) The bitcoin address to "
             "use for the private key.\n"
             "2. \"message\"         (string, required) The message to create a "
             "signature of.\n"
             "\nResult:\n"
             "\"signature\"          (string) The signature of the message "
             "encoded in base 64\n"
             "\nExamples:\n"
             "\nUnlock the wallet for 30 seconds\n" +
             HelpExampleCli("walletpassphrase", "\"mypassphrase\" 30") +
             "\nCreate the signature\n" +
             HelpExampleCli(
                 "signmessage",
                 "\"1D1ZrZNe3JUo7ZycKEYQQiQAWd9y54F4XX\" \"my message\"") +
             "\nVerify the signature\n" +
             HelpExampleCli("verifymessage", "\"1D1ZrZNe3JUo7ZycKEYQQiQAWd9y54F4"
                                             "XX\" \"signature\" \"my "
                                             "message\"") +
             "\nAs json rpc\n" +
             HelpExampleRpc(
                 "signmessage",
                 "\"1D1ZrZNe3JUo7ZycKEYQQiQAWd9y54F4XX\", \"my message\""));
     }
 
     LOCK2(cs_main, pwallet->cs_wallet);
 
     EnsureWalletIsUnlocked(pwallet);
 
     std::string strAddress = request.params[0].get_str();
     std::string strMessage = request.params[1].get_str();
 
     CTxDestination dest = DecodeDestination(strAddress);
     if (!IsValidDestination(dest)) {
         throw JSONRPCError(RPC_TYPE_ERROR, "Invalid address");
     }
 
     const CKeyID *keyID = boost::get<CKeyID>(&dest);
     if (!keyID) {
         throw JSONRPCError(RPC_TYPE_ERROR, "Address does not refer to key");
     }
 
     CKey key;
     if (!pwallet->GetKey(*keyID, key)) {
         throw JSONRPCError(RPC_WALLET_ERROR, "Private key not available");
     }
 
     CHashWriter ss(SER_GETHASH, 0);
     ss << strMessageMagic;
     ss << strMessage;
 
     std::vector<uint8_t> vchSig;
     if (!key.SignCompact(ss.GetHash(), vchSig)) {
         throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Sign failed");
     }
 
     return EncodeBase64(&vchSig[0], vchSig.size());
 }
 
 static UniValue getreceivedbyaddress(const Config &config,
                                      const JSONRPCRequest &request) {
     CWallet *const pwallet = GetWalletForJSONRPCRequest(request);
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
     }
 
     if (request.fHelp || request.params.size() < 1 ||
         request.params.size() > 2) {
         throw std::runtime_error(
             "getreceivedbyaddress \"address\" ( minconf )\n"
             "\nReturns the total amount received by the given address in "
             "transactions with at least minconf confirmations.\n"
             "\nArguments:\n"
             "1. \"address\"         (string, required) The bitcoin address for "
             "transactions.\n"
             "2. minconf             (numeric, optional, default=1) Only "
             "include transactions confirmed at least this many times.\n"
             "\nResult:\n"
             "amount   (numeric) The total amount in " +
             CURRENCY_UNIT +
             " received at this address.\n"
             "\nExamples:\n"
             "\nThe amount from transactions with at least 1 confirmation\n" +
             HelpExampleCli("getreceivedbyaddress",
                            "\"1D1ZrZNe3JUo7ZycKEYQQiQAWd9y54F4XX\"") +
             "\nThe amount including unconfirmed transactions, zero "
             "confirmations\n" +
             HelpExampleCli("getreceivedbyaddress",
                            "\"1D1ZrZNe3JUo7ZycKEYQQiQAWd9y54F4XX\" 0") +
             "\nThe amount with at least 6 confirmation, very safe\n" +
             HelpExampleCli("getreceivedbyaddress",
                            "\"1D1ZrZNe3JUo7ZycKEYQQiQAWd9y54F4XX\" 6") +
             "\nAs a json rpc call\n" +
             HelpExampleRpc("getreceivedbyaddress",
                            "\"1D1ZrZNe3JUo7ZycKEYQQiQAWd9y54F4XX\", 6"));
     }
 
     LOCK2(cs_main, pwallet->cs_wallet);
 
     // Bitcoin address
     CTxDestination dest = DecodeDestination(request.params[0].get_str());
     if (!IsValidDestination(dest)) {
         throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY,
                            "Invalid Bitcoin address");
     }
     CScript scriptPubKey = GetScriptForDestination(dest);
     if (!IsMine(*pwallet, scriptPubKey)) {
         return ValueFromAmount(Amount(0));
     }
 
     // Minimum confirmations
     int nMinDepth = 1;
     if (request.params.size() > 1) {
         nMinDepth = request.params[1].get_int();
     }
 
     // Tally
     Amount nAmount(0);
     for (const std::pair<uint256, CWalletTx> &pairWtx : pwallet->mapWallet) {
         const CWalletTx &wtx = pairWtx.second;
 
         CValidationState state;
         if (wtx.IsCoinBase() ||
             !ContextualCheckTransactionForCurrentBlock(config, *wtx.tx,
                                                        state)) {
             continue;
         }
 
         for (const CTxOut &txout : wtx.tx->vout) {
             if (txout.scriptPubKey == scriptPubKey) {
                 if (wtx.GetDepthInMainChain() >= nMinDepth) {
                     nAmount += txout.nValue;
                 }
             }
         }
     }
 
     return ValueFromAmount(nAmount);
 }
 
 static UniValue getreceivedbyaccount(const Config &config,
                                      const JSONRPCRequest &request) {
     CWallet *const pwallet = GetWalletForJSONRPCRequest(request);
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
     }
 
     if (request.fHelp || request.params.size() < 1 ||
         request.params.size() > 2) {
         throw std::runtime_error(
             "getreceivedbyaccount \"account\" ( minconf )\n"
             "\nDEPRECATED. Returns the total amount received by addresses with "
             "<account> in transactions with at least [minconf] confirmations.\n"
             "\nArguments:\n"
             "1. \"account\"      (string, required) The selected account, may "
             "be the default account using \"\".\n"
             "2. minconf          (numeric, optional, default=1) Only include "
             "transactions confirmed at least this many times.\n"
             "\nResult:\n"
             "amount              (numeric) The total amount in " +
             CURRENCY_UNIT + " received for this account.\n"
                             "\nExamples:\n"
                             "\nAmount received by the default account with at "
                             "least 1 confirmation\n" +
             HelpExampleCli("getreceivedbyaccount", "\"\"") +
             "\nAmount received at the tabby account including unconfirmed "
             "amounts with zero confirmations\n" +
             HelpExampleCli("getreceivedbyaccount", "\"tabby\" 0") +
             "\nThe amount with at least 6 confirmation, very safe\n" +
             HelpExampleCli("getreceivedbyaccount", "\"tabby\" 6") +
             "\nAs a json rpc call\n" +
             HelpExampleRpc("getreceivedbyaccount", "\"tabby\", 6"));
     }
 
     LOCK2(cs_main, pwallet->cs_wallet);
 
     // Minimum confirmations
     int nMinDepth = 1;
     if (request.params.size() > 1) {
         nMinDepth = request.params[1].get_int();
     }
 
     // Get the set of pub keys assigned to account
     std::string strAccount = AccountFromValue(request.params[0]);
     std::set<CTxDestination> setAddress =
         pwallet->GetAccountAddresses(strAccount);
 
     // Tally
     Amount nAmount(0);
     for (const std::pair<uint256, CWalletTx> &pairWtx : pwallet->mapWallet) {
         const CWalletTx &wtx = pairWtx.second;
         CValidationState state;
         if (wtx.IsCoinBase() ||
             !ContextualCheckTransactionForCurrentBlock(config, *wtx.tx,
                                                        state)) {
             continue;
         }
 
         for (const CTxOut &txout : wtx.tx->vout) {
             CTxDestination address;
             if (ExtractDestination(txout.scriptPubKey, address) &&
                 IsMine(*pwallet, address) && setAddress.count(address)) {
                 if (wtx.GetDepthInMainChain() >= nMinDepth) {
                     nAmount += txout.nValue;
                 }
             }
         }
     }
 
     return ValueFromAmount(nAmount);
 }
 
 static UniValue getbalance(const Config &config,
                            const JSONRPCRequest &request) {
     CWallet *const pwallet = GetWalletForJSONRPCRequest(request);
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
     }
 
     if (request.fHelp || request.params.size() > 3) {
         throw std::runtime_error(
             "getbalance ( \"account\" minconf include_watchonly )\n"
             "\nIf account is not specified, returns the server's total "
             "available balance.\n"
             "If account is specified (DEPRECATED), returns the balance in the "
             "account.\n"
             "Note that the account \"\" is not the same as leaving the "
             "parameter out.\n"
             "The server total may be different to the balance in the default "
             "\"\" account.\n"
             "\nArguments:\n"
             "1. \"account\"         (string, optional) DEPRECATED. The account "
             "string may be given as a\n"
             "                     specific account name to find the balance "
             "associated with wallet keys in\n"
             "                     a named account, or as the empty string "
             "(\"\") to find the balance\n"
             "                     associated with wallet keys not in any named "
             "account, or as \"*\" to find\n"
             "                     the balance associated with all wallet keys "
             "regardless of account.\n"
             "                     When this option is specified, it calculates "
             "the balance in a different\n"
             "                     way than when it is not specified, and which "
             "can count spends twice when\n"
             "                     there are conflicting pending transactions "
             "temporarily resulting in low\n"
             "                     or even negative balances.\n"
             "                     In general, account balance calculation is "
             "not considered reliable and\n"
             "                     has resulted in confusing outcomes, so it is "
             "recommended to avoid passing\n"
             "                     this argument.\n"
             "2. minconf           (numeric, optional, default=1) Only include "
             "transactions confirmed at least this many times.\n"
             "3. include_watchonly (bool, optional, default=false) Also include "
             "balance in watch-only addresses (see 'importaddress')\n"
             "\nResult:\n"
             "amount              (numeric) The total amount in " +
             CURRENCY_UNIT + " received for this account.\n"
                             "\nExamples:\n"
                             "\nThe total amount in the wallet\n" +
             HelpExampleCli("getbalance", "") +
             "\nThe total amount in the wallet at least 5 blocks confirmed\n" +
             HelpExampleCli("getbalance", "\"*\" 6") + "\nAs a json rpc call\n" +
             HelpExampleRpc("getbalance", "\"*\", 6"));
     }
 
     LOCK2(cs_main, pwallet->cs_wallet);
 
     if (request.params.size() == 0) {
         return ValueFromAmount(pwallet->GetBalance());
     }
 
     int nMinDepth = 1;
     if (request.params.size() > 1) {
         nMinDepth = request.params[1].get_int();
     }
 
     isminefilter filter = ISMINE_SPENDABLE;
     if (request.params.size() > 2 && request.params[2].get_bool()) {
         filter = filter | ISMINE_WATCH_ONLY;
     }
 
     if (request.params[0].get_str() == "*") {
         // Calculate total balance in a very different way from GetBalance().
         // The biggest difference is that GetBalance() sums up all unspent
         // TxOuts paying to the wallet, while this sums up both spent and
         // unspent TxOuts paying to the wallet, and then subtracts the values of
         // TxIns spending from the wallet. This also has fewer restrictions on
         // which unconfirmed transactions are considered trusted.
         Amount nBalance(0);
         for (const std::pair<uint256, CWalletTx> &pairWtx :
              pwallet->mapWallet) {
             const CWalletTx &wtx = pairWtx.second;
             CValidationState state;
             if (!ContextualCheckTransactionForCurrentBlock(config, wtx,
                                                            state) ||
                 wtx.GetBlocksToMaturity() > 0 ||
                 wtx.GetDepthInMainChain() < 0) {
                 continue;
             }
 
             Amount allFee;
             std::string strSentAccount;
             std::list<COutputEntry> listReceived;
             std::list<COutputEntry> listSent;
             wtx.GetAmounts(listReceived, listSent, allFee, strSentAccount,
                            filter);
             if (wtx.GetDepthInMainChain() >= nMinDepth) {
                 for (const COutputEntry &r : listReceived) {
                     nBalance += r.amount;
                 }
             }
             for (const COutputEntry &s : listSent) {
                 nBalance -= s.amount;
             }
             nBalance -= allFee;
         }
         return ValueFromAmount(nBalance);
     }
 
     std::string strAccount = AccountFromValue(request.params[0]);
 
     Amount nBalance = pwallet->GetAccountBalance(strAccount, nMinDepth, filter);
 
     return ValueFromAmount(nBalance);
 }
 
 static UniValue getunconfirmedbalance(const Config &config,
                                       const JSONRPCRequest &request) {
     CWallet *const pwallet = GetWalletForJSONRPCRequest(request);
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
     }
 
     if (request.fHelp || request.params.size() > 0) {
         throw std::runtime_error(
             "getunconfirmedbalance\n"
             "Returns the server's total unconfirmed balance\n");
     }
 
     LOCK2(cs_main, pwallet->cs_wallet);
 
     return ValueFromAmount(pwallet->GetUnconfirmedBalance());
 }
 
 static UniValue movecmd(const Config &config, const JSONRPCRequest &request) {
     CWallet *const pwallet = GetWalletForJSONRPCRequest(request);
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
     }
 
     if (request.fHelp || request.params.size() < 3 ||
         request.params.size() > 5) {
         throw std::runtime_error(
             "move \"fromaccount\" \"toaccount\" amount ( minconf \"comment\" "
             ")\n"
             "\nDEPRECATED. Move a specified amount from one account in your "
             "wallet to another.\n"
             "\nArguments:\n"
             "1. \"fromaccount\"   (string, required) The name of the account "
             "to move funds from. May be the default account using \"\".\n"
             "2. \"toaccount\"     (string, required) The name of the account "
             "to move funds to. May be the default account using \"\".\n"
             "3. amount            (numeric) Quantity of " +
             CURRENCY_UNIT +
             " to move between accounts.\n"
             "4. (dummy)           (numeric, optional) Ignored. Remains for "
             "backward compatibility.\n"
             "5. \"comment\"       (string, optional) An optional comment, "
             "stored in the wallet only.\n"
             "\nResult:\n"
             "true|false           (boolean) true if successful.\n"
             "\nExamples:\n"
             "\nMove 0.01 " +
             CURRENCY_UNIT +
             " from the default account to the account named tabby\n" +
             HelpExampleCli("move", "\"\" \"tabby\" 0.01") + "\nMove 0.01 " +
             CURRENCY_UNIT + " timotei to akiko with a comment and funds have 6 "
                             "confirmations\n" +
             HelpExampleCli("move",
                            "\"timotei\" \"akiko\" 0.01 6 \"happy birthday!\"") +
             "\nAs a json rpc call\n" +
             HelpExampleRpc(
                 "move",
                 "\"timotei\", \"akiko\", 0.01, 6, \"happy birthday!\""));
     }
 
     LOCK2(cs_main, pwallet->cs_wallet);
 
     std::string strFrom = AccountFromValue(request.params[0]);
     std::string strTo = AccountFromValue(request.params[1]);
     Amount nAmount = AmountFromValue(request.params[2]);
     if (nAmount <= Amount(0)) {
         throw JSONRPCError(RPC_TYPE_ERROR, "Invalid amount for send");
     }
     if (request.params.size() > 3) {
         // Unused parameter, used to be nMinDepth, keep type-checking it though.
         (void)request.params[3].get_int();
     }
 
     std::string strComment;
     if (request.params.size() > 4) {
         strComment = request.params[4].get_str();
     }
 
     if (!pwallet->AccountMove(strFrom, strTo, nAmount, strComment)) {
         throw JSONRPCError(RPC_DATABASE_ERROR, "database error");
     }
 
     return true;
 }
 
 static UniValue sendfrom(const Config &config, const JSONRPCRequest &request) {
     CWallet *const pwallet = GetWalletForJSONRPCRequest(request);
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
     }
 
     if (request.fHelp || request.params.size() < 3 ||
         request.params.size() > 6) {
         throw std::runtime_error(
             "sendfrom \"fromaccount\" \"toaddress\" amount ( minconf "
             "\"comment\" \"comment_to\" )\n"
             "\nDEPRECATED (use sendtoaddress). Sent an amount from an account "
             "to a bitcoin address." +
             HelpRequiringPassphrase(pwallet) +
             "\n"
             "\nArguments:\n"
             "1. \"fromaccount\"       (string, required) The name of the "
             "account to send funds from. May be the default account using "
             "\"\".\n"
             "                       Specifying an account does not influence "
             "coin selection, but it does associate the newly created\n"
             "                       transaction with the account, so the "
             "account's balance computation and transaction history can "
             "reflect\n"
             "                       the spend.\n"
             "2. \"toaddress\"         (string, required) The bitcoin address "
             "to send funds to.\n"
             "3. amount                (numeric or string, required) The amount "
             "in " +
             CURRENCY_UNIT +
             " (transaction fee is added on top).\n"
             "4. minconf               (numeric, optional, default=1) Only use "
             "funds with at least this many confirmations.\n"
             "5. \"comment\"           (string, optional) A comment used to "
             "store what the transaction is for. \n"
             "                                     This is not part of the "
             "transaction, just kept in your wallet.\n"
             "6. \"comment_to\"        (string, optional) An optional comment "
             "to store the name of the person or organization \n"
             "                                     to which you're sending the "
             "transaction. This is not part of the transaction, \n"
             "                                     it is just kept in your "
             "wallet.\n"
             "\nResult:\n"
             "\"txid\"                 (string) The transaction id.\n"
             "\nExamples:\n"
             "\nSend 0.01 " +
             CURRENCY_UNIT + " from the default account to the address, must "
                             "have at least 1 confirmation\n" +
             HelpExampleCli("sendfrom",
                            "\"\" \"1M72Sfpbz1BPpXFHz9m3CdqATR44Jvaydd\" 0.01") +
             "\nSend 0.01 from the tabby account to the given address, funds "
             "must have at least 6 confirmations\n" +
             HelpExampleCli("sendfrom",
                            "\"tabby\" \"1M72Sfpbz1BPpXFHz9m3CdqATR44Jvaydd\" "
                            "0.01 6 \"donation\" \"seans outpost\"") +
             "\nAs a json rpc call\n" +
             HelpExampleRpc("sendfrom",
                            "\"tabby\", \"1M72Sfpbz1BPpXFHz9m3CdqATR44Jvaydd\", "
                            "0.01, 6, \"donation\", \"seans outpost\""));
     }
 
     LOCK2(cs_main, pwallet->cs_wallet);
 
     std::string strAccount = AccountFromValue(request.params[0]);
     CTxDestination dest = DecodeDestination(request.params[1].get_str());
     if (!IsValidDestination(dest)) {
         throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY,
                            "Invalid Bitcoin address");
     }
     Amount nAmount = AmountFromValue(request.params[2]);
     if (nAmount <= Amount(0)) {
         throw JSONRPCError(RPC_TYPE_ERROR, "Invalid amount for send");
     }
 
     int nMinDepth = 1;
     if (request.params.size() > 3) {
         nMinDepth = request.params[3].get_int();
     }
 
     CWalletTx wtx;
     wtx.strFromAccount = strAccount;
     if (request.params.size() > 4 && !request.params[4].isNull() &&
         !request.params[4].get_str().empty()) {
         wtx.mapValue["comment"] = request.params[4].get_str();
     }
 
     if (request.params.size() > 5 && !request.params[5].isNull() &&
         !request.params[5].get_str().empty()) {
         wtx.mapValue["to"] = request.params[5].get_str();
     }
 
     EnsureWalletIsUnlocked(pwallet);
 
     // Check funds
     Amount nBalance =
         pwallet->GetAccountBalance(strAccount, nMinDepth, ISMINE_SPENDABLE);
     if (nAmount > nBalance) {
         throw JSONRPCError(RPC_WALLET_INSUFFICIENT_FUNDS,
                            "Account has insufficient funds");
     }
 
     SendMoney(pwallet, dest, nAmount, false, wtx);
 
     return wtx.GetId().GetHex();
 }
 
 static UniValue sendmany(const Config &config, const JSONRPCRequest &request) {
     CWallet *const pwallet = GetWalletForJSONRPCRequest(request);
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
     }
 
     if (request.fHelp || request.params.size() < 2 ||
         request.params.size() > 5) {
         throw std::runtime_error(
             "sendmany \"fromaccount\" {\"address\":amount,...} ( minconf "
             "\"comment\" [\"address\",...] )\n"
             "\nSend multiple times. Amounts are double-precision floating "
             "point numbers." +
             HelpRequiringPassphrase(pwallet) +
             "\n"
             "\nArguments:\n"
             "1. \"fromaccount\"         (string, required) DEPRECATED. The "
             "account to send the funds from. Should be \"\" for the default "
             "account\n"
             "2. \"amounts\"             (string, required) A json object with "
             "addresses and amounts\n"
             "    {\n"
             "      \"address\":amount   (numeric or string) The bitcoin "
             "address is the key, the numeric amount (can be string) in " +
             CURRENCY_UNIT +
             " is the value\n"
             "      ,...\n"
             "    }\n"
             "3. minconf                 (numeric, optional, default=1) Only "
             "use the balance confirmed at least this many times.\n"
             "4. \"comment\"             (string, optional) A comment\n"
             "5. subtractfeefrom         (array, optional) A json array with "
             "addresses.\n"
             "                           The fee will be equally deducted from "
             "the amount of each selected address.\n"
             "                           Those recipients will receive less "
             "bitcoins than you enter in their corresponding amount field.\n"
             "                           If no addresses are specified here, "
             "the sender pays the fee.\n"
             "    [\n"
             "      \"address\"          (string) Subtract fee from this "
             "address\n"
             "      ,...\n"
             "    ]\n"
             "\nResult:\n"
             "\"txid\"                   (string) The transaction id for the "
             "send. Only 1 transaction is created regardless of \n"
             "                                    the number of addresses.\n"
             "\nExamples:\n"
             "\nSend two amounts to two different addresses:\n" +
             HelpExampleCli("sendmany",
                            "\"\" "
                            "\"{\\\"1D1ZrZNe3JUo7ZycKEYQQiQAWd9y54F4XX\\\":0.01,"
                            "\\\"1353tsE8YMTA4EuV7dgUXGjNFf9KpVvKHz\\\":0.02}"
                            "\"") +
             "\nSend two amounts to two different addresses setting the "
             "confirmation and comment:\n" +
             HelpExampleCli("sendmany",
                            "\"\" "
                            "\"{\\\"1D1ZrZNe3JUo7ZycKEYQQiQAWd9y54F4XX\\\":0.01,"
                            "\\\"1353tsE8YMTA4EuV7dgUXGjNFf9KpVvKHz\\\":0.02}\" "
                            "6 \"testing\"") +
             "\nSend two amounts to two different addresses, subtract fee from "
             "amount:\n" +
             HelpExampleCli("sendmany",
                            "\"\" "
                            "\"{\\\"1D1ZrZNe3JUo7ZycKEYQQiQAWd9y54F4XX\\\":0.01,"
                            "\\\"1353tsE8YMTA4EuV7dgUXGjNFf9KpVvKHz\\\":0.02}\" "
                            "1 \"\" "
                            "\"[\\\"1D1ZrZNe3JUo7ZycKEYQQiQAWd9y54F4XX\\\","
                            "\\\"1353tsE8YMTA4EuV7dgUXGjNFf9KpVvKHz\\\"]\"") +
             "\nAs a json rpc call\n" +
             HelpExampleRpc("sendmany",
                            "\"\", "
                            "\"{\\\"1D1ZrZNe3JUo7ZycKEYQQiQAWd9y54F4XX\\\":0.01,"
                            "\\\"1353tsE8YMTA4EuV7dgUXGjNFf9KpVvKHz\\\":0.02}\","
                            " 6, \"testing\""));
     }
 
     LOCK2(cs_main, pwallet->cs_wallet);
 
     if (pwallet->GetBroadcastTransactions() && !g_connman) {
         throw JSONRPCError(
             RPC_CLIENT_P2P_DISABLED,
             "Error: Peer-to-peer functionality missing or disabled");
     }
 
     std::string strAccount = AccountFromValue(request.params[0]);
     UniValue sendTo = request.params[1].get_obj();
     int nMinDepth = 1;
     if (request.params.size() > 2) {
         nMinDepth = request.params[2].get_int();
     }
 
     CWalletTx wtx;
     wtx.strFromAccount = strAccount;
     if (request.params.size() > 3 && !request.params[3].isNull() &&
         !request.params[3].get_str().empty()) {
         wtx.mapValue["comment"] = request.params[3].get_str();
     }
 
     UniValue subtractFeeFromAmount(UniValue::VARR);
     if (request.params.size() > 4) {
         subtractFeeFromAmount = request.params[4].get_array();
     }
 
     std::set<CTxDestination> destinations;
     std::vector<CRecipient> vecSend;
 
     Amount totalAmount(0);
     std::vector<std::string> keys = sendTo.getKeys();
     for (const std::string &name_ : keys) {
         CTxDestination dest = DecodeDestination(name_);
         if (!IsValidDestination(dest)) {
             throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY,
                                std::string("Invalid Bitcoin address: ") +
                                    name_);
         }
 
         if (destinations.count(dest)) {
             throw JSONRPCError(
                 RPC_INVALID_PARAMETER,
                 std::string("Invalid parameter, duplicated address: ") + name_);
         }
         destinations.insert(dest);
 
         CScript scriptPubKey = GetScriptForDestination(dest);
         Amount nAmount = AmountFromValue(sendTo[name_]);
         if (nAmount <= Amount(0)) {
             throw JSONRPCError(RPC_TYPE_ERROR, "Invalid amount for send");
         }
         totalAmount += nAmount;
 
         bool fSubtractFeeFromAmount = false;
         for (size_t idx = 0; idx < subtractFeeFromAmount.size(); idx++) {
             const UniValue &addr = subtractFeeFromAmount[idx];
             if (addr.get_str() == name_) {
                 fSubtractFeeFromAmount = true;
             }
         }
 
         CRecipient recipient = {scriptPubKey, nAmount, fSubtractFeeFromAmount};
         vecSend.push_back(recipient);
     }
 
     EnsureWalletIsUnlocked(pwallet);
 
     // Check funds
     Amount nBalance =
         pwallet->GetAccountBalance(strAccount, nMinDepth, ISMINE_SPENDABLE);
     if (totalAmount > nBalance) {
         throw JSONRPCError(RPC_WALLET_INSUFFICIENT_FUNDS,
                            "Account has insufficient funds");
     }
 
     // Send
     CReserveKey keyChange(pwallet);
     Amount nFeeRequired(0);
     int nChangePosRet = -1;
     std::string strFailReason;
     bool fCreated = pwallet->CreateTransaction(
         vecSend, wtx, keyChange, nFeeRequired, nChangePosRet, strFailReason);
     if (!fCreated) {
         throw JSONRPCError(RPC_WALLET_INSUFFICIENT_FUNDS, strFailReason);
     }
     CValidationState state;
     if (!pwallet->CommitTransaction(wtx, keyChange, g_connman.get(), state)) {
         strFailReason = strprintf("Transaction commit failed:: %s",
                                   state.GetRejectReason());
         throw JSONRPCError(RPC_WALLET_ERROR, strFailReason);
     }
 
     return wtx.GetId().GetHex();
 }
 
 static UniValue addmultisigaddress(const Config &config,
                                    const JSONRPCRequest &request) {
     CWallet *const pwallet = GetWalletForJSONRPCRequest(request);
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
     }
 
     if (request.fHelp || request.params.size() < 2 ||
         request.params.size() > 3) {
         std::string msg =
             "addmultisigaddress nrequired [\"key\",...] ( \"account\" )\n"
             "\nAdd a nrequired-to-sign multisignature address to the wallet.\n"
             "Each key is a Bitcoin address or hex-encoded public key.\n"
             "If 'account' is specified (DEPRECATED), assign address to that "
             "account.\n"
 
             "\nArguments:\n"
             "1. nrequired        (numeric, required) The number of required "
             "signatures out of the n keys or addresses.\n"
             "2. \"keys\"         (string, required) A json array of bitcoin "
             "addresses or hex-encoded public keys\n"
             "     [\n"
             "       \"address\"  (string) bitcoin address or hex-encoded "
             "public key\n"
             "       ...,\n"
             "     ]\n"
             "3. \"account\"      (string, optional) DEPRECATED. An account to "
             "assign the addresses to.\n"
 
             "\nResult:\n"
             "\"address\"         (string) A bitcoin address associated with "
             "the keys.\n"
 
             "\nExamples:\n"
             "\nAdd a multisig address from 2 addresses\n" +
             HelpExampleCli("addmultisigaddress",
                            "2 "
                            "\"[\\\"16sSauSf5pF2UkUwvKGq4qjNRzBZYqgEL5\\\","
                            "\\\"171sgjn4YtPu27adkKGrdDwzRTxnRkBfKV\\\"]\"") +
             "\nAs json rpc call\n" +
             HelpExampleRpc("addmultisigaddress",
                            "2, "
                            "\"[\\\"16sSauSf5pF2UkUwvKGq4qjNRzBZYqgEL5\\\","
                            "\\\"171sgjn4YtPu27adkKGrdDwzRTxnRkBfKV\\\"]\"");
         throw std::runtime_error(msg);
     }
 
     LOCK2(cs_main, pwallet->cs_wallet);
 
     std::string strAccount;
     if (request.params.size() > 2) {
         strAccount = AccountFromValue(request.params[2]);
     }
 
     // Construct using pay-to-script-hash:
     CScript inner = createmultisig_redeemScript(pwallet, request.params);
     CScriptID innerID(inner);
     pwallet->AddCScript(inner);
 
     pwallet->SetAddressBook(innerID, strAccount, "send");
     return EncodeDestination(innerID);
 }
 
 struct tallyitem {
     Amount nAmount;
     int nConf;
     std::vector<uint256> txids;
     bool fIsWatchonly;
     tallyitem() {
         nAmount = Amount(0);
         nConf = std::numeric_limits<int>::max();
         fIsWatchonly = false;
     }
 };
 
 static UniValue ListReceived(const Config &config, CWallet *const pwallet,
                              const UniValue &params, bool fByAccounts) {
     // Minimum confirmations
     int nMinDepth = 1;
     if (params.size() > 0) {
         nMinDepth = params[0].get_int();
     }
 
     // Whether to include empty accounts
     bool fIncludeEmpty = false;
     if (params.size() > 1) {
         fIncludeEmpty = params[1].get_bool();
     }
 
     isminefilter filter = ISMINE_SPENDABLE;
     if (params.size() > 2 && params[2].get_bool()) {
         filter = filter | ISMINE_WATCH_ONLY;
     }
 
     // Tally
     std::map<CTxDestination, tallyitem> mapTally;
     for (const std::pair<uint256, CWalletTx> &pairWtx : pwallet->mapWallet) {
         const CWalletTx &wtx = pairWtx.second;
 
         CValidationState state;
         if (wtx.IsCoinBase() ||
             !ContextualCheckTransactionForCurrentBlock(config, *wtx.tx,
                                                        state)) {
             continue;
         }
 
         int nDepth = wtx.GetDepthInMainChain();
         if (nDepth < nMinDepth) {
             continue;
         }
 
         for (const CTxOut &txout : wtx.tx->vout) {
             CTxDestination address;
             if (!ExtractDestination(txout.scriptPubKey, address)) {
                 continue;
             }
 
             isminefilter mine = IsMine(*pwallet, address);
             if (!(mine & filter)) {
                 continue;
             }
 
             tallyitem &item = mapTally[address];
             item.nAmount += txout.nValue;
             item.nConf = std::min(item.nConf, nDepth);
             item.txids.push_back(wtx.GetId());
             if (mine & ISMINE_WATCH_ONLY) {
                 item.fIsWatchonly = true;
             }
         }
     }
 
     // Reply
     UniValue ret(UniValue::VARR);
     std::map<std::string, tallyitem> mapAccountTally;
     for (const std::pair<CTxDestination, CAddressBookData> &item :
          pwallet->mapAddressBook) {
         const CTxDestination &dest = item.first;
         const std::string &strAccount = item.second.name;
         std::map<CTxDestination, tallyitem>::iterator it = mapTally.find(dest);
         if (it == mapTally.end() && !fIncludeEmpty) {
             continue;
         }
 
         Amount nAmount(0);
         int nConf = std::numeric_limits<int>::max();
         bool fIsWatchonly = false;
         if (it != mapTally.end()) {
             nAmount = (*it).second.nAmount;
             nConf = (*it).second.nConf;
             fIsWatchonly = (*it).second.fIsWatchonly;
         }
 
         if (fByAccounts) {
             tallyitem &_item = mapAccountTally[strAccount];
             _item.nAmount += nAmount;
             _item.nConf = std::min(_item.nConf, nConf);
             _item.fIsWatchonly = fIsWatchonly;
         } else {
             UniValue obj(UniValue::VOBJ);
             if (fIsWatchonly) {
                 obj.push_back(Pair("involvesWatchonly", true));
             }
             obj.push_back(Pair("address", EncodeDestination(dest)));
             obj.push_back(Pair("account", strAccount));
             obj.push_back(Pair("amount", ValueFromAmount(nAmount)));
             obj.push_back(
                 Pair("confirmations",
                      (nConf == std::numeric_limits<int>::max() ? 0 : nConf)));
             if (!fByAccounts) {
                 obj.push_back(Pair("label", strAccount));
             }
             UniValue transactions(UniValue::VARR);
             if (it != mapTally.end()) {
                 for (const uint256 &_item : (*it).second.txids) {
                     transactions.push_back(_item.GetHex());
                 }
             }
             obj.push_back(Pair("txids", transactions));
             ret.push_back(obj);
         }
     }
 
     if (fByAccounts) {
         for (std::map<std::string, tallyitem>::iterator it =
                  mapAccountTally.begin();
              it != mapAccountTally.end(); ++it) {
             Amount nAmount = (*it).second.nAmount;
             int nConf = (*it).second.nConf;
             UniValue obj(UniValue::VOBJ);
             if ((*it).second.fIsWatchonly) {
                 obj.push_back(Pair("involvesWatchonly", true));
             }
             obj.push_back(Pair("account", (*it).first));
             obj.push_back(Pair("amount", ValueFromAmount(nAmount)));
             obj.push_back(
                 Pair("confirmations",
                      (nConf == std::numeric_limits<int>::max() ? 0 : nConf)));
             ret.push_back(obj);
         }
     }
 
     return ret;
 }
 
 static UniValue listreceivedbyaddress(const Config &config,
                                       const JSONRPCRequest &request) {
     CWallet *const pwallet = GetWalletForJSONRPCRequest(request);
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
     }
 
     if (request.fHelp || request.params.size() > 3) {
         throw std::runtime_error(
             "listreceivedbyaddress ( minconf include_empty include_watchonly)\n"
             "\nList balances by receiving address.\n"
             "\nArguments:\n"
             "1. minconf           (numeric, optional, default=1) The minimum "
             "number of confirmations before payments are included.\n"
             "2. include_empty     (bool, optional, default=false) Whether to "
             "include addresses that haven't received any payments.\n"
             "3. include_watchonly (bool, optional, default=false) Whether to "
             "include watch-only addresses (see 'importaddress').\n"
 
             "\nResult:\n"
             "[\n"
             "  {\n"
             "    \"involvesWatchonly\" : true,        (bool) Only returned if "
             "imported addresses were involved in transaction\n"
             "    \"address\" : \"receivingaddress\",  (string) The receiving "
             "address\n"
             "    \"account\" : \"accountname\",       (string) DEPRECATED. The "
             "account of the receiving address. The default account is \"\".\n"
             "    \"amount\" : x.xxx,                  (numeric) The total "
             "amount in " +
             CURRENCY_UNIT +
             " received by the address\n"
             "    \"confirmations\" : n,               (numeric) The number of "
             "confirmations of the most recent transaction included\n"
             "    \"label\" : \"label\",               (string) A comment for "
             "the address/transaction, if any\n"
             "    \"txids\": [\n"
             "       n,                                (numeric) The ids of "
             "transactions received with the address \n"
             "       ...\n"
             "    ]\n"
             "  }\n"
             "  ,...\n"
             "]\n"
 
             "\nExamples:\n" +
             HelpExampleCli("listreceivedbyaddress", "") +
             HelpExampleCli("listreceivedbyaddress", "6 true") +
             HelpExampleRpc("listreceivedbyaddress", "6, true, true"));
     }
 
     LOCK2(cs_main, pwallet->cs_wallet);
     return ListReceived(config, pwallet, request.params, false);
 }
 
 static UniValue listreceivedbyaccount(const Config &config,
                                       const JSONRPCRequest &request) {
     CWallet *const pwallet = GetWalletForJSONRPCRequest(request);
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
     }
 
     if (request.fHelp || request.params.size() > 3) {
         throw std::runtime_error(
             "listreceivedbyaccount ( minconf include_empty include_watchonly)\n"
             "\nDEPRECATED. List balances by account.\n"
             "\nArguments:\n"
             "1. minconf           (numeric, optional, default=1) The minimum "
             "number of confirmations before payments are included.\n"
             "2. include_empty     (bool, optional, default=false) Whether to "
             "include accounts that haven't received any payments.\n"
             "3. include_watchonly (bool, optional, default=false) Whether to "
             "include watch-only addresses (see 'importaddress').\n"
 
             "\nResult:\n"
             "[\n"
             "  {\n"
             "    \"involvesWatchonly\" : true,   (bool) Only returned if "
             "imported addresses were involved in transaction\n"
             "    \"account\" : \"accountname\",  (string) The account name of "
             "the receiving account\n"
             "    \"amount\" : x.xxx,             (numeric) The total amount "
             "received by addresses with this account\n"
             "    \"confirmations\" : n,          (numeric) The number of "
             "confirmations of the most recent transaction included\n"
             "    \"label\" : \"label\"           (string) A comment for the "
             "address/transaction, if any\n"
             "  }\n"
             "  ,...\n"
             "]\n"
 
             "\nExamples:\n" +
             HelpExampleCli("listreceivedbyaccount", "") +
             HelpExampleCli("listreceivedbyaccount", "6 true") +
             HelpExampleRpc("listreceivedbyaccount", "6, true, true"));
     }
 
     LOCK2(cs_main, pwallet->cs_wallet);
 
     return ListReceived(config, pwallet, request.params, true);
 }
 
 static void MaybePushAddress(UniValue &entry, const CTxDestination &dest) {
     if (IsValidDestination(dest)) {
         entry.push_back(Pair("address", EncodeDestination(dest)));
     }
 }
 
 void ListTransactions(CWallet *const pwallet, const CWalletTx &wtx,
                       const std::string &strAccount, int nMinDepth, bool fLong,
                       UniValue &ret, const isminefilter &filter) {
     Amount nFee;
     std::string strSentAccount;
     std::list<COutputEntry> listReceived;
     std::list<COutputEntry> listSent;
 
     wtx.GetAmounts(listReceived, listSent, nFee, strSentAccount, filter);
 
     bool fAllAccounts = (strAccount == std::string("*"));
     bool involvesWatchonly = wtx.IsFromMe(ISMINE_WATCH_ONLY);
 
     // Sent
     if ((!listSent.empty() || nFee != Amount(0)) &&
         (fAllAccounts || strAccount == strSentAccount)) {
         for (const COutputEntry &s : listSent) {
             UniValue entry(UniValue::VOBJ);
             if (involvesWatchonly ||
                 (::IsMine(*pwallet, s.destination) & ISMINE_WATCH_ONLY)) {
                 entry.push_back(Pair("involvesWatchonly", true));
             }
             entry.push_back(Pair("account", strSentAccount));
             MaybePushAddress(entry, s.destination);
             entry.push_back(Pair("category", "send"));
             entry.push_back(Pair("amount", ValueFromAmount(-s.amount)));
             if (pwallet->mapAddressBook.count(s.destination)) {
                 entry.push_back(
                     Pair("label", pwallet->mapAddressBook[s.destination].name));
             }
             entry.push_back(Pair("vout", s.vout));
             entry.push_back(Pair("fee", ValueFromAmount(-1 * nFee)));
             if (fLong) {
                 WalletTxToJSON(wtx, entry);
             }
             entry.push_back(Pair("abandoned", wtx.isAbandoned()));
             ret.push_back(entry);
         }
     }
 
     // Received
     if (listReceived.size() > 0 && wtx.GetDepthInMainChain() >= nMinDepth) {
         for (const COutputEntry &r : listReceived) {
             std::string account;
             if (pwallet->mapAddressBook.count(r.destination)) {
                 account = pwallet->mapAddressBook[r.destination].name;
             }
             if (fAllAccounts || (account == strAccount)) {
                 UniValue entry(UniValue::VOBJ);
                 if (involvesWatchonly ||
                     (::IsMine(*pwallet, r.destination) & ISMINE_WATCH_ONLY)) {
                     entry.push_back(Pair("involvesWatchonly", true));
                 }
                 entry.push_back(Pair("account", account));
                 MaybePushAddress(entry, r.destination);
                 if (wtx.IsCoinBase()) {
                     if (wtx.GetDepthInMainChain() < 1) {
                         entry.push_back(Pair("category", "orphan"));
                     } else if (wtx.GetBlocksToMaturity() > 0) {
                         entry.push_back(Pair("category", "immature"));
                     } else {
                         entry.push_back(Pair("category", "generate"));
                     }
                 } else {
                     entry.push_back(Pair("category", "receive"));
                 }
                 entry.push_back(Pair("amount", ValueFromAmount(r.amount)));
                 if (pwallet->mapAddressBook.count(r.destination)) {
                     entry.push_back(Pair("label", account));
                 }
                 entry.push_back(Pair("vout", r.vout));
                 if (fLong) {
                     WalletTxToJSON(wtx, entry);
                 }
                 ret.push_back(entry);
             }
         }
     }
 }
 
 void AcentryToJSON(const CAccountingEntry &acentry,
                    const std::string &strAccount, UniValue &ret) {
     bool fAllAccounts = (strAccount == std::string("*"));
 
     if (fAllAccounts || acentry.strAccount == strAccount) {
         UniValue entry(UniValue::VOBJ);
         entry.push_back(Pair("account", acentry.strAccount));
         entry.push_back(Pair("category", "move"));
         entry.push_back(Pair("time", acentry.nTime));
         entry.push_back(Pair("amount", ValueFromAmount(acentry.nCreditDebit)));
         entry.push_back(Pair("otheraccount", acentry.strOtherAccount));
         entry.push_back(Pair("comment", acentry.strComment));
         ret.push_back(entry);
     }
 }
 
 static UniValue listtransactions(const Config &config,
                                  const JSONRPCRequest &request) {
     CWallet *const pwallet = GetWalletForJSONRPCRequest(request);
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
     }
 
     if (request.fHelp || request.params.size() > 4) {
         throw std::runtime_error(
             "listtransactions ( \"account\" count skip include_watchonly)\n"
             "\nReturns up to 'count' most recent transactions skipping the "
             "first 'from' transactions for account 'account'.\n"
             "\nArguments:\n"
             "1. \"account\"    (string, optional) DEPRECATED. The account "
             "name. Should be \"*\".\n"
             "2. count          (numeric, optional, default=10) The number of "
             "transactions to return\n"
             "3. skip           (numeric, optional, default=0) The number of "
             "transactions to skip\n"
             "4. include_watchonly (bool, optional, default=false) Include "
             "transactions to watch-only addresses (see 'importaddress')\n"
             "\nResult:\n"
             "[\n"
             "  {\n"
             "    \"account\":\"accountname\",       (string) DEPRECATED. The "
             "account name associated with the transaction. \n"
             "                                                It will be \"\" "
             "for the default account.\n"
             "    \"address\":\"address\",    (string) The bitcoin address of "
             "the transaction. Not present for \n"
             "                                                move transactions "
             "(category = move).\n"
             "    \"category\":\"send|receive|move\", (string) The transaction "
             "category. 'move' is a local (off blockchain)\n"
             "                                                transaction "
             "between accounts, and not associated with an address,\n"
             "                                                transaction id or "
             "block. 'send' and 'receive' transactions are \n"
             "                                                associated with "
             "an address, transaction id and block details\n"
             "    \"amount\": x.xxx,          (numeric) The amount in " +
             CURRENCY_UNIT +
             ". This is negative for the 'send' category, and for the\n"
             "                                         'move' category for "
             "moves outbound. It is positive for the 'receive' category,\n"
             "                                         and for the 'move' "
             "category for inbound funds.\n"
             "    \"label\": \"label\",       (string) A comment for the "
             "address/transaction, if any\n"
             "    \"vout\": n,                (numeric) the vout value\n"
             "    \"fee\": x.xxx,             (numeric) The amount of the fee "
             "in " +
             CURRENCY_UNIT +
             ". This is negative and only available for the \n"
             "                                         'send' category of "
             "transactions.\n"
             "    \"confirmations\": n,       (numeric) The number of "
             "confirmations for the transaction. Available for 'send' and \n"
             "                                         'receive' category of "
             "transactions. Negative confirmations indicate the\n"
             "                                         transaction conflicts "
             "with the block chain\n"
             "    \"trusted\": xxx,           (bool) Whether we consider the "
             "outputs of this unconfirmed transaction safe to spend.\n"
             "    \"blockhash\": \"hashvalue\", (string) The block hash "
             "containing the transaction. Available for 'send' and 'receive'\n"
             "                                          category of "
             "transactions.\n"
             "    \"blockindex\": n,          (numeric) The index of the "
             "transaction in the block that includes it. Available for 'send' "
             "and 'receive'\n"
             "                                          category of "
             "transactions.\n"
             "    \"blocktime\": xxx,         (numeric) The block time in "
             "seconds since epoch (1 Jan 1970 GMT).\n"
             "    \"txid\": \"transactionid\", (string) The transaction id. "
             "Available for 'send' and 'receive' category of transactions.\n"
             "    \"time\": xxx,              (numeric) The transaction time in "
             "seconds since epoch (midnight Jan 1 1970 GMT).\n"
             "    \"timereceived\": xxx,      (numeric) The time received in "
             "seconds since epoch (midnight Jan 1 1970 GMT). Available \n"
             "                                          for 'send' and "
             "'receive' category of transactions.\n"
             "    \"comment\": \"...\",       (string) If a comment is "
             "associated with the transaction.\n"
             "    \"otheraccount\": \"accountname\",  (string) DEPRECATED. For "
             "the 'move' category of transactions, the account the funds came \n"
             "                                          from (for receiving "
             "funds, positive amounts), or went to (for sending funds,\n"
             "                                          negative amounts).\n"
             "    \"abandoned\": xxx          (bool) 'true' if the transaction "
             "has been abandoned (inputs are respendable). Only available for "
             "the \n"
             "                                         'send' category of "
             "transactions.\n"
             "  }\n"
             "]\n"
 
             "\nExamples:\n"
             "\nList the most recent 10 transactions in the systems\n" +
             HelpExampleCli("listtransactions", "") +
             "\nList transactions 100 to 120\n" +
             HelpExampleCli("listtransactions", "\"*\" 20 100") +
             "\nAs a json rpc call\n" +
             HelpExampleRpc("listtransactions", "\"*\", 20, 100"));
     }
 
     LOCK2(cs_main, pwallet->cs_wallet);
 
     std::string strAccount = "*";
     if (request.params.size() > 0) {
         strAccount = request.params[0].get_str();
     }
 
     int nCount = 10;
     if (request.params.size() > 1) {
         nCount = request.params[1].get_int();
     }
 
     int nFrom = 0;
     if (request.params.size() > 2) {
         nFrom = request.params[2].get_int();
     }
 
     isminefilter filter = ISMINE_SPENDABLE;
     if (request.params.size() > 3 && request.params[3].get_bool()) {
         filter = filter | ISMINE_WATCH_ONLY;
     }
 
     if (nCount < 0) {
         throw JSONRPCError(RPC_INVALID_PARAMETER, "Negative count");
     }
     if (nFrom < 0) {
         throw JSONRPCError(RPC_INVALID_PARAMETER, "Negative from");
     }
     UniValue ret(UniValue::VARR);
 
     const CWallet::TxItems &txOrdered = pwallet->wtxOrdered;
 
     // iterate backwards until we have nCount items to return:
     for (CWallet::TxItems::const_reverse_iterator it = txOrdered.rbegin();
          it != txOrdered.rend(); ++it) {
         CWalletTx *const pwtx = (*it).second.first;
         if (pwtx != 0) {
             ListTransactions(pwallet, *pwtx, strAccount, 0, true, ret, filter);
         }
         CAccountingEntry *const pacentry = (*it).second.second;
         if (pacentry != 0) {
             AcentryToJSON(*pacentry, strAccount, ret);
         }
 
         if ((int)ret.size() >= (nCount + nFrom)) {
             break;
         }
     }
 
     // ret is newest to oldest
 
     if (nFrom > (int)ret.size()) {
         nFrom = ret.size();
     }
     if ((nFrom + nCount) > (int)ret.size()) {
         nCount = ret.size() - nFrom;
     }
 
     std::vector<UniValue> arrTmp = ret.getValues();
 
     std::vector<UniValue>::iterator first = arrTmp.begin();
     std::advance(first, nFrom);
     std::vector<UniValue>::iterator last = arrTmp.begin();
     std::advance(last, nFrom + nCount);
 
     if (last != arrTmp.end()) {
         arrTmp.erase(last, arrTmp.end());
     }
     if (first != arrTmp.begin()) {
         arrTmp.erase(arrTmp.begin(), first);
     }
 
     // Return oldest to newest
     std::reverse(arrTmp.begin(), arrTmp.end());
 
     ret.clear();
     ret.setArray();
     ret.push_backV(arrTmp);
 
     return ret;
 }
 
 static UniValue listaccounts(const Config &config,
                              const JSONRPCRequest &request) {
     CWallet *const pwallet = GetWalletForJSONRPCRequest(request);
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
     }
 
     if (request.fHelp || request.params.size() > 2) {
         throw std::runtime_error(
             "listaccounts ( minconf include_watchonly)\n"
             "\nDEPRECATED. Returns Object that has account names as keys, "
             "account balances as values.\n"
             "\nArguments:\n"
             "1. minconf             (numeric, optional, default=1) Only "
             "include transactions with at least this many confirmations\n"
             "2. include_watchonly   (bool, optional, default=false) Include "
             "balances in watch-only addresses (see 'importaddress')\n"
             "\nResult:\n"
             "{                      (json object where keys are account names, "
             "and values are numeric balances\n"
             "  \"account\": x.xxx,  (numeric) The property name is the account "
             "name, and the value is the total balance for the account.\n"
             "  ...\n"
             "}\n"
             "\nExamples:\n"
             "\nList account balances where there at least 1 confirmation\n" +
             HelpExampleCli("listaccounts", "") + "\nList account balances "
                                                  "including zero confirmation "
                                                  "transactions\n" +
             HelpExampleCli("listaccounts", "0") +
             "\nList account balances for 6 or more confirmations\n" +
             HelpExampleCli("listaccounts", "6") + "\nAs json rpc call\n" +
             HelpExampleRpc("listaccounts", "6"));
     }
 
     LOCK2(cs_main, pwallet->cs_wallet);
 
     int nMinDepth = 1;
     if (request.params.size() > 0) {
         nMinDepth = request.params[0].get_int();
     }
 
     isminefilter includeWatchonly = ISMINE_SPENDABLE;
     if (request.params.size() > 1 && request.params[1].get_bool()) {
         includeWatchonly = includeWatchonly | ISMINE_WATCH_ONLY;
     }
 
     std::map<std::string, Amount> mapAccountBalances;
     for (const std::pair<CTxDestination, CAddressBookData> &entry :
          pwallet->mapAddressBook) {
         // This address belongs to me
         if (IsMine(*pwallet, entry.first) & includeWatchonly) {
             mapAccountBalances[entry.second.name] = Amount(0);
         }
     }
 
     for (const std::pair<uint256, CWalletTx> &pairWtx : pwallet->mapWallet) {
         const CWalletTx &wtx = pairWtx.second;
         Amount nFee;
         std::string strSentAccount;
         std::list<COutputEntry> listReceived;
         std::list<COutputEntry> listSent;
         int nDepth = wtx.GetDepthInMainChain();
         if (wtx.GetBlocksToMaturity() > 0 || nDepth < 0) {
             continue;
         }
         wtx.GetAmounts(listReceived, listSent, nFee, strSentAccount,
                        includeWatchonly);
         mapAccountBalances[strSentAccount] -= nFee;
         for (const COutputEntry &s : listSent) {
             mapAccountBalances[strSentAccount] -= s.amount;
         }
         if (nDepth >= nMinDepth) {
             for (const COutputEntry &r : listReceived) {
                 if (pwallet->mapAddressBook.count(r.destination)) {
                     mapAccountBalances[pwallet->mapAddressBook[r.destination]
                                            .name] += r.amount;
                 } else {
                     mapAccountBalances[""] += r.amount;
                 }
             }
         }
     }
 
     const std::list<CAccountingEntry> &acentries = pwallet->laccentries;
     for (const CAccountingEntry &entry : acentries) {
         mapAccountBalances[entry.strAccount] += entry.nCreditDebit;
     }
 
     UniValue ret(UniValue::VOBJ);
     for (const std::pair<std::string, Amount> &accountBalance :
          mapAccountBalances) {
         ret.push_back(
             Pair(accountBalance.first, ValueFromAmount(accountBalance.second)));
     }
     return ret;
 }
 
 static UniValue listsinceblock(const Config &config,
                                const JSONRPCRequest &request) {
     CWallet *const pwallet = GetWalletForJSONRPCRequest(request);
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
     }
 
     if (request.fHelp) {
         throw std::runtime_error(
             "listsinceblock ( \"blockhash\" target_confirmations "
             "include_watchonly)\n"
             "\nGet all transactions in blocks since block [blockhash], or all "
             "transactions if omitted\n"
             "\nArguments:\n"
             "1. \"blockhash\"            (string, optional) The block hash to "
             "list transactions since\n"
             "2. target_confirmations:    (numeric, optional) The confirmations "
             "required, must be 1 or more\n"
             "3. include_watchonly:       (bool, optional, default=false) "
             "Include transactions to watch-only addresses (see 'importaddress')"
             "\nResult:\n"
             "{\n"
             "  \"transactions\": [\n"
             "    \"account\":\"accountname\",       (string) DEPRECATED. The "
             "account name associated with the transaction. Will be \"\" for "
             "the default account.\n"
             "    \"address\":\"address\",    (string) The bitcoin address of "
             "the transaction. Not present for move transactions (category = "
             "move).\n"
             "    \"category\":\"send|receive\",     (string) The transaction "
             "category. 'send' has negative amounts, 'receive' has positive "
             "amounts.\n"
             "    \"amount\": x.xxx,          (numeric) The amount in " +
             CURRENCY_UNIT +
             ". This is negative for the 'send' category, and for the 'move' "
             "category for moves \n"
             "                                          outbound. It is "
             "positive for the 'receive' category, and for the 'move' category "
             "for inbound funds.\n"
             "    \"vout\" : n,               (numeric) the vout value\n"
             "    \"fee\": x.xxx,             (numeric) The amount of the fee "
             "in " +
             CURRENCY_UNIT +
             ". This is negative and only available for the 'send' category of "
             "transactions.\n"
             "    \"confirmations\": n,       (numeric) The number of "
             "confirmations for the transaction. Available for 'send' and "
             "'receive' category of transactions.\n"
             "                                          When it's < 0, it means "
             "the transaction conflicted that many blocks ago.\n"
             "    \"blockhash\": \"hashvalue\",     (string) The block hash "
             "containing the transaction. Available for 'send' and 'receive' "
             "category of transactions.\n"
             "    \"blockindex\": n,          (numeric) The index of the "
             "transaction in the block that includes it. Available for 'send' "
             "and 'receive' category of transactions.\n"
             "    \"blocktime\": xxx,         (numeric) The block time in "
             "seconds since epoch (1 Jan 1970 GMT).\n"
             "    \"txid\": \"transactionid\",  (string) The transaction id. "
             "Available for 'send' and 'receive' category of transactions.\n"
             "    \"time\": xxx,              (numeric) The transaction time in "
             "seconds since epoch (Jan 1 1970 GMT).\n"
             "    \"timereceived\": xxx,      (numeric) The time received in "
             "seconds since epoch (Jan 1 1970 GMT). Available for 'send' and "
             "'receive' category of transactions.\n"
             "    \"abandoned\": xxx,         (bool) 'true' if the transaction "
             "has been abandoned (inputs are respendable). Only available for "
             "the 'send' category of transactions.\n"
             "    \"comment\": \"...\",       (string) If a comment is "
             "associated with the transaction.\n"
             "    \"label\" : \"label\"       (string) A comment for the "
             "address/transaction, if any\n"
             "    \"to\": \"...\",            (string) If a comment to is "
             "associated with the transaction.\n"
             "  ],\n"
             "  \"lastblock\": \"lastblockhash\"     (string) The hash of the "
             "last block\n"
             "}\n"
             "\nExamples:\n" +
             HelpExampleCli("listsinceblock", "") +
             HelpExampleCli("listsinceblock", "\"000000000000000bacf66f7497b7dc4"
                                              "5ef753ee9a7d38571037cdb1a57f663ad"
                                              "\" 6") +
             HelpExampleRpc("listsinceblock", "\"000000000000000bacf66f7497b7dc4"
                                              "5ef753ee9a7d38571037cdb1a57f663ad"
                                              "\", 6"));
     }
 
     LOCK2(cs_main, pwallet->cs_wallet);
 
     const CBlockIndex *pindex = nullptr;
     int target_confirms = 1;
     isminefilter filter = ISMINE_SPENDABLE;
 
     if (request.params.size() > 0) {
         uint256 blockId;
 
         blockId.SetHex(request.params[0].get_str());
         BlockMap::iterator it = mapBlockIndex.find(blockId);
         if (it != mapBlockIndex.end()) {
             pindex = it->second;
             if (chainActive[pindex->nHeight] != pindex) {
                 // the block being asked for is a part of a deactivated chain;
                 // we don't want to depend on its perceived height in the block
                 // chain, we want to instead use the last common ancestor
                 pindex = chainActive.FindFork(pindex);
             }
         }
     }
 
     if (request.params.size() > 1) {
         target_confirms = request.params[1].get_int();
 
         if (target_confirms < 1) {
             throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid parameter");
         }
     }
 
     if (request.params.size() > 2 && request.params[2].get_bool()) {
         filter = filter | ISMINE_WATCH_ONLY;
     }
 
     int depth = pindex ? (1 + chainActive.Height() - pindex->nHeight) : -1;
 
     UniValue transactions(UniValue::VARR);
 
     for (const std::pair<uint256, CWalletTx> &pairWtx : pwallet->mapWallet) {
         CWalletTx tx = pairWtx.second;
 
         if (depth == -1 || tx.GetDepthInMainChain() < depth) {
             ListTransactions(pwallet, tx, "*", 0, true, transactions, filter);
         }
     }
 
     CBlockIndex *pblockLast =
         chainActive[chainActive.Height() + 1 - target_confirms];
     uint256 lastblock = pblockLast ? pblockLast->GetBlockHash() : uint256();
 
     UniValue ret(UniValue::VOBJ);
     ret.push_back(Pair("transactions", transactions));
     ret.push_back(Pair("lastblock", lastblock.GetHex()));
 
     return ret;
 }
 
 static UniValue gettransaction(const Config &config,
                                const JSONRPCRequest &request) {
     CWallet *const pwallet = GetWalletForJSONRPCRequest(request);
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
     }
 
     if (request.fHelp || request.params.size() < 1 ||
         request.params.size() > 2) {
         throw std::runtime_error(
             "gettransaction \"txid\" ( include_watchonly )\n"
             "\nGet detailed information about in-wallet transaction <txid>\n"
             "\nArguments:\n"
             "1. \"txid\"                  (string, required) The transaction "
             "id\n"
             "2. \"include_watchonly\"     (bool, optional, default=false) "
             "Whether to include watch-only addresses in balance calculation "
             "and details[]\n"
             "\nResult:\n"
             "{\n"
             "  \"amount\" : x.xxx,        (numeric) The transaction amount "
             "in " +
             CURRENCY_UNIT +
             "\n"
             "  \"fee\": x.xxx,            (numeric) The amount of the fee in " +
             CURRENCY_UNIT +
             ". This is negative and only available for the \n"
             "                              'send' category of transactions.\n"
             "  \"confirmations\" : n,     (numeric) The number of "
             "confirmations\n"
             "  \"blockhash\" : \"hash\",  (string) The block hash\n"
             "  \"blockindex\" : xx,       (numeric) The index of the "
             "transaction in the block that includes it\n"
             "  \"blocktime\" : ttt,       (numeric) The time in seconds since "
             "epoch (1 Jan 1970 GMT)\n"
             "  \"txid\" : \"transactionid\",   (string) The transaction id.\n"
             "  \"time\" : ttt,            (numeric) The transaction time in "
             "seconds since epoch (1 Jan 1970 GMT)\n"
             "  \"timereceived\" : ttt,    (numeric) The time received in "
             "seconds since epoch (1 Jan 1970 GMT)\n"
             "  \"bip125-replaceable\": \"yes|no|unknown\",  (string) Whether "
             "this transaction could be replaced due to BIP125 "
             "(replace-by-fee);\n"
             "                                                   may be unknown "
             "for unconfirmed transactions not in the mempool\n"
             "  \"details\" : [\n"
             "    {\n"
             "      \"account\" : \"accountname\",      (string) DEPRECATED. "
             "The account name involved in the transaction, can be \"\" for the "
             "default account.\n"
             "      \"address\" : \"address\",          (string) The bitcoin "
             "address involved in the transaction\n"
             "      \"category\" : \"send|receive\",    (string) The category, "
             "either 'send' or 'receive'\n"
             "      \"amount\" : x.xxx,                 (numeric) The amount "
             "in " +
             CURRENCY_UNIT + "\n"
                             "      \"label\" : \"label\",              "
                             "(string) A comment for the address/transaction, "
                             "if any\n"
                             "      \"vout\" : n,                       "
                             "(numeric) the vout value\n"
                             "      \"fee\": x.xxx,                     "
                             "(numeric) The amount of the fee in " +
             CURRENCY_UNIT +
             ". This is negative and only available for the \n"
             "                                           'send' category of "
             "transactions.\n"
             "      \"abandoned\": xxx                  (bool) 'true' if the "
             "transaction has been abandoned (inputs are respendable). Only "
             "available for the \n"
             "                                           'send' category of "
             "transactions.\n"
             "    }\n"
             "    ,...\n"
             "  ],\n"
             "  \"hex\" : \"data\"         (string) Raw data for transaction\n"
             "}\n"
 
             "\nExamples:\n" +
             HelpExampleCli("gettransaction", "\"1075db55d416d3ca199f55b6084e211"
                                              "5b9345e16c5cf302fc80e9d5fbf5d48d"
                                              "\"") +
             HelpExampleCli("gettransaction", "\"1075db55d416d3ca199f55b6084e211"
                                              "5b9345e16c5cf302fc80e9d5fbf5d48d"
                                              "\" true") +
             HelpExampleRpc("gettransaction", "\"1075db55d416d3ca199f55b6084e211"
                                              "5b9345e16c5cf302fc80e9d5fbf5d48d"
                                              "\""));
     }
 
     LOCK2(cs_main, pwallet->cs_wallet);
 
     uint256 hash;
     hash.SetHex(request.params[0].get_str());
 
     isminefilter filter = ISMINE_SPENDABLE;
     if (request.params.size() > 1 && request.params[1].get_bool()) {
         filter = filter | ISMINE_WATCH_ONLY;
     }
 
     UniValue entry(UniValue::VOBJ);
     if (!pwallet->mapWallet.count(hash)) {
         throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY,
                            "Invalid or non-wallet transaction id");
     }
 
     const CWalletTx &wtx = pwallet->mapWallet[hash];
 
     Amount nCredit = wtx.GetCredit(filter);
     Amount nDebit = wtx.GetDebit(filter);
     Amount nNet = (nCredit - nDebit);
     Amount nFee =
         (wtx.IsFromMe(filter) ? wtx.tx->GetValueOut() - nDebit : Amount(0));
 
     entry.push_back(Pair("amount", ValueFromAmount(nNet - nFee)));
     if (wtx.IsFromMe(filter)) {
         entry.push_back(Pair("fee", ValueFromAmount(nFee)));
     }
 
     WalletTxToJSON(wtx, entry);
 
     UniValue details(UniValue::VARR);
     ListTransactions(pwallet, wtx, "*", 0, false, details, filter);
     entry.push_back(Pair("details", details));
 
     std::string strHex =
         EncodeHexTx(static_cast<CTransaction>(wtx), RPCSerializationFlags());
     entry.push_back(Pair("hex", strHex));
 
     return entry;
 }
 
 static UniValue abandontransaction(const Config &config,
                                    const JSONRPCRequest &request) {
     CWallet *const pwallet = GetWalletForJSONRPCRequest(request);
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
     }
 
     if (request.fHelp || request.params.size() != 1) {
         throw std::runtime_error(
             "abandontransaction \"txid\"\n"
             "\nMark in-wallet transaction <txid> as abandoned\n"
             "This will mark this transaction and all its in-wallet descendants "
             "as abandoned which will allow\n"
             "for their inputs to be respent.  It can be used to replace "
             "\"stuck\" or evicted transactions.\n"
             "It only works on transactions which are not included in a block "
             "and are not currently in the mempool.\n"
             "It has no effect on transactions which are already conflicted or "
             "abandoned.\n"
             "\nArguments:\n"
             "1. \"txid\"    (string, required) The transaction id\n"
             "\nResult:\n"
             "\nExamples:\n" +
             HelpExampleCli("abandontransaction", "\"1075db55d416d3ca199f55b6084"
                                                  "e2115b9345e16c5cf302fc80e9d5f"
                                                  "bf5d48d\"") +
             HelpExampleRpc("abandontransaction", "\"1075db55d416d3ca199f55b6084"
                                                  "e2115b9345e16c5cf302fc80e9d5f"
                                                  "bf5d48d\""));
     }
 
     LOCK2(cs_main, pwallet->cs_wallet);
 
     uint256 hash;
     hash.SetHex(request.params[0].get_str());
 
     if (!pwallet->mapWallet.count(hash)) {
         throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY,
                            "Invalid or non-wallet transaction id");
     }
 
     if (!pwallet->AbandonTransaction(hash)) {
         throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY,
                            "Transaction not eligible for abandonment");
     }
 
     return NullUniValue;
 }
 
 static UniValue backupwallet(const Config &config,
                              const JSONRPCRequest &request) {
     CWallet *const pwallet = GetWalletForJSONRPCRequest(request);
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
     }
 
     if (request.fHelp || request.params.size() != 1) {
         throw std::runtime_error(
             "backupwallet \"destination\"\n"
             "\nSafely copies current wallet file to destination, which can be "
             "a directory or a path with filename.\n"
             "\nArguments:\n"
             "1. \"destination\"   (string) The destination directory or file\n"
             "\nExamples:\n" +
             HelpExampleCli("backupwallet", "\"backup.dat\"") +
             HelpExampleRpc("backupwallet", "\"backup.dat\""));
     }
 
     LOCK2(cs_main, pwallet->cs_wallet);
 
     std::string strDest = request.params[0].get_str();
     if (!pwallet->BackupWallet(strDest)) {
         throw JSONRPCError(RPC_WALLET_ERROR, "Error: Wallet backup failed!");
     }
 
     return NullUniValue;
 }
 
 static UniValue keypoolrefill(const Config &config,
                               const JSONRPCRequest &request) {
     CWallet *const pwallet = GetWalletForJSONRPCRequest(request);
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
     }
 
     if (request.fHelp || request.params.size() > 1) {
         throw std::runtime_error(
             "keypoolrefill ( newsize )\n"
             "\nFills the keypool." +
             HelpRequiringPassphrase(pwallet) +
             "\n"
             "\nArguments\n"
             "1. newsize     (numeric, optional, default=100) "
             "The new keypool size\n"
             "\nExamples:\n" +
             HelpExampleCli("keypoolrefill", "") +
             HelpExampleRpc("keypoolrefill", ""));
     }
 
     LOCK2(cs_main, pwallet->cs_wallet);
 
     // 0 is interpreted by TopUpKeyPool() as the default keypool size given by
     // -keypool
     unsigned int kpSize = 0;
     if (request.params.size() > 0) {
         if (request.params[0].get_int() < 0) {
             throw JSONRPCError(RPC_INVALID_PARAMETER,
                                "Invalid parameter, expected valid size.");
         }
         kpSize = (unsigned int)request.params[0].get_int();
     }
 
     EnsureWalletIsUnlocked(pwallet);
     pwallet->TopUpKeyPool(kpSize);
 
     if (pwallet->GetKeyPoolSize() < kpSize) {
         throw JSONRPCError(RPC_WALLET_ERROR, "Error refreshing keypool.");
     }
 
     return NullUniValue;
 }
 
 static void LockWallet(CWallet *pWallet) {
     LOCK(pWallet->cs_wallet);
     pWallet->nRelockTime = 0;
     pWallet->Lock();
 }
 
 static UniValue walletpassphrase(const Config &config,
                                  const JSONRPCRequest &request) {
     CWallet *const pwallet = GetWalletForJSONRPCRequest(request);
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
     }
 
     if (pwallet->IsCrypted() && (request.fHelp || request.params.size() != 2)) {
         throw std::runtime_error(
             "walletpassphrase \"passphrase\" timeout\n"
             "\nStores the wallet decryption key in memory for 'timeout' "
             "seconds.\n"
             "This is needed prior to performing transactions related to "
             "private keys such as sending bitcoins\n"
             "\nArguments:\n"
             "1. \"passphrase\"     (string, required) The wallet passphrase\n"
             "2. timeout            (numeric, required) The time to keep the "
             "decryption key in seconds.\n"
             "\nNote:\n"
             "Issuing the walletpassphrase command while the wallet is already "
             "unlocked will set a new unlock\n"
             "time that overrides the old one.\n"
             "\nExamples:\n"
             "\nunlock the wallet for 60 seconds\n" +
             HelpExampleCli("walletpassphrase", "\"my pass phrase\" 60") +
             "\nLock the wallet again (before 60 seconds)\n" +
             HelpExampleCli("walletlock", "") + "\nAs json rpc call\n" +
             HelpExampleRpc("walletpassphrase", "\"my pass phrase\", 60"));
     }
 
     LOCK2(cs_main, pwallet->cs_wallet);
 
     if (request.fHelp) {
         return true;
     }
 
     if (!pwallet->IsCrypted()) {
         throw JSONRPCError(RPC_WALLET_WRONG_ENC_STATE,
                            "Error: running with an unencrypted wallet, but "
                            "walletpassphrase was called.");
     }
 
     // Note that the walletpassphrase is stored in request.params[0] which is
     // not mlock()ed
     SecureString strWalletPass;
     strWalletPass.reserve(100);
     // TODO: get rid of this .c_str() by implementing
     // SecureString::operator=(std::string)
     // Alternately, find a way to make request.params[0] mlock()'d to begin
     // with.
     strWalletPass = request.params[0].get_str().c_str();
 
     if (strWalletPass.length() > 0) {
         if (!pwallet->Unlock(strWalletPass)) {
             throw JSONRPCError(
                 RPC_WALLET_PASSPHRASE_INCORRECT,
                 "Error: The wallet passphrase entered was incorrect.");
         }
     } else {
         throw std::runtime_error(
             "walletpassphrase <passphrase> <timeout>\n"
             "Stores the wallet decryption key in memory for "
             "<timeout> seconds.");
     }
 
     pwallet->TopUpKeyPool();
 
     int64_t nSleepTime = request.params[1].get_int64();
     pwallet->nRelockTime = GetTime() + nSleepTime;
     RPCRunLater(strprintf("lockwallet(%s)", pwallet->GetName()),
                 boost::bind(LockWallet, pwallet), nSleepTime);
 
     return NullUniValue;
 }
 
 static UniValue walletpassphrasechange(const Config &config,
                                        const JSONRPCRequest &request) {
     CWallet *const pwallet = GetWalletForJSONRPCRequest(request);
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
     }
 
     if (pwallet->IsCrypted() && (request.fHelp || request.params.size() != 2)) {
         throw std::runtime_error(
             "walletpassphrasechange \"oldpassphrase\" \"newpassphrase\"\n"
             "\nChanges the wallet passphrase from 'oldpassphrase' to "
             "'newpassphrase'.\n"
             "\nArguments:\n"
             "1. \"oldpassphrase\"      (string) The current passphrase\n"
             "2. \"newpassphrase\"      (string) The new passphrase\n"
             "\nExamples:\n" +
             HelpExampleCli("walletpassphrasechange",
                            "\"old one\" \"new one\"") +
             HelpExampleRpc("walletpassphrasechange",
                            "\"old one\", \"new one\""));
     }
 
     LOCK2(cs_main, pwallet->cs_wallet);
 
     if (request.fHelp) {
         return true;
     }
     if (!pwallet->IsCrypted()) {
         throw JSONRPCError(RPC_WALLET_WRONG_ENC_STATE,
                            "Error: running with an unencrypted wallet, but "
                            "walletpassphrasechange was called.");
     }
 
     // TODO: get rid of these .c_str() calls by implementing
     // SecureString::operator=(std::string)
     // Alternately, find a way to make request.params[0] mlock()'d to begin
     // with.
     SecureString strOldWalletPass;
     strOldWalletPass.reserve(100);
     strOldWalletPass = request.params[0].get_str().c_str();
 
     SecureString strNewWalletPass;
     strNewWalletPass.reserve(100);
     strNewWalletPass = request.params[1].get_str().c_str();
 
     if (strOldWalletPass.length() < 1 || strNewWalletPass.length() < 1) {
         throw std::runtime_error(
             "walletpassphrasechange <oldpassphrase> <newpassphrase>\n"
             "Changes the wallet passphrase from <oldpassphrase> to "
             "<newpassphrase>.");
     }
 
     if (!pwallet->ChangeWalletPassphrase(strOldWalletPass, strNewWalletPass)) {
         throw JSONRPCError(
             RPC_WALLET_PASSPHRASE_INCORRECT,
             "Error: The wallet passphrase entered was incorrect.");
     }
 
     return NullUniValue;
 }
 
 static UniValue walletlock(const Config &config,
                            const JSONRPCRequest &request) {
     CWallet *const pwallet = GetWalletForJSONRPCRequest(request);
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
     }
 
     if (pwallet->IsCrypted() && (request.fHelp || request.params.size() != 0)) {
         throw std::runtime_error(
             "walletlock\n"
             "\nRemoves the wallet encryption key from memory, locking the "
             "wallet.\n"
             "After calling this method, you will need to call walletpassphrase "
             "again\n"
             "before being able to call any methods which require the wallet to "
             "be unlocked.\n"
             "\nExamples:\n"
             "\nSet the passphrase for 2 minutes to perform a transaction\n" +
             HelpExampleCli("walletpassphrase", "\"my pass phrase\" 120") +
             "\nPerform a send (requires passphrase set)\n" +
             HelpExampleCli("sendtoaddress",
                            "\"1M72Sfpbz1BPpXFHz9m3CdqATR44Jvaydd\" 1.0") +
             "\nClear the passphrase since we are done before 2 minutes is "
             "up\n" +
             HelpExampleCli("walletlock", "") + "\nAs json rpc call\n" +
             HelpExampleRpc("walletlock", ""));
     }
 
     LOCK2(cs_main, pwallet->cs_wallet);
 
     if (request.fHelp) {
         return true;
     }
     if (!pwallet->IsCrypted()) {
         throw JSONRPCError(RPC_WALLET_WRONG_ENC_STATE,
                            "Error: running with an unencrypted wallet, but "
                            "walletlock was called.");
     }
 
     pwallet->Lock();
     pwallet->nRelockTime = 0;
 
     return NullUniValue;
 }
 
 static UniValue encryptwallet(const Config &config,
                               const JSONRPCRequest &request) {
     CWallet *const pwallet = GetWalletForJSONRPCRequest(request);
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
     }
 
     if (!pwallet->IsCrypted() &&
         (request.fHelp || request.params.size() != 1)) {
         throw std::runtime_error(
             "encryptwallet \"passphrase\"\n"
             "\nEncrypts the wallet with 'passphrase'. This is for first time "
             "encryption.\n"
             "After this, any calls that interact with private keys such as "
             "sending or signing \n"
             "will require the passphrase to be set prior the making these "
             "calls.\n"
             "Use the walletpassphrase call for this, and then walletlock "
             "call.\n"
             "If the wallet is already encrypted, use the "
             "walletpassphrasechange call.\n"
             "Note that this will shutdown the server.\n"
             "\nArguments:\n"
             "1. \"passphrase\"    (string) The pass phrase to encrypt the "
             "wallet with. It must be at least 1 character, but should be "
             "long.\n"
             "\nExamples:\n"
             "\nEncrypt you wallet\n" +
             HelpExampleCli("encryptwallet", "\"my pass phrase\"") +
             "\nNow set the passphrase to use the wallet, such as for signing "
             "or sending bitcoin\n" +
             HelpExampleCli("walletpassphrase", "\"my pass phrase\"") +
             "\nNow we can so something like sign\n" +
             HelpExampleCli("signmessage", "\"address\" \"test message\"") +
             "\nNow lock the wallet again by removing the passphrase\n" +
             HelpExampleCli("walletlock", "") + "\nAs a json rpc call\n" +
             HelpExampleRpc("encryptwallet", "\"my pass phrase\""));
     }
 
     LOCK2(cs_main, pwallet->cs_wallet);
 
     if (request.fHelp) {
         return true;
     }
     if (pwallet->IsCrypted()) {
         throw JSONRPCError(RPC_WALLET_WRONG_ENC_STATE,
                            "Error: running with an encrypted wallet, but "
                            "encryptwallet was called.");
     }
 
     // TODO: get rid of this .c_str() by implementing
     // SecureString::operator=(std::string)
     // Alternately, find a way to make request.params[0] mlock()'d to begin
     // with.
     SecureString strWalletPass;
     strWalletPass.reserve(100);
     strWalletPass = request.params[0].get_str().c_str();
 
     if (strWalletPass.length() < 1) {
         throw std::runtime_error("encryptwallet <passphrase>\n"
                                  "Encrypts the wallet with <passphrase>.");
     }
 
     if (!pwallet->EncryptWallet(strWalletPass)) {
         throw JSONRPCError(RPC_WALLET_ENCRYPTION_FAILED,
                            "Error: Failed to encrypt the wallet.");
     }
 
     // BDB seems to have a bad habit of writing old data into
     // slack space in .dat files; that is bad if the old data is
     // unencrypted private keys. So:
     StartShutdown();
     return "wallet encrypted; Bitcoin server stopping, restart to run with "
            "encrypted wallet. The keypool has been flushed and a new HD seed "
            "was generated (if you are using HD). You need to make a new "
            "backup.";
 }
 
 static UniValue lockunspent(const Config &config,
                             const JSONRPCRequest &request) {
     CWallet *const pwallet = GetWalletForJSONRPCRequest(request);
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
     }
 
     if (request.fHelp || request.params.size() < 1 ||
         request.params.size() > 2) {
         throw std::runtime_error(
             "lockunspent unlock ([{\"txid\":\"txid\",\"vout\":n},...])\n"
             "\nUpdates list of temporarily unspendable outputs.\n"
             "Temporarily lock (unlock=false) or unlock (unlock=true) specified "
             "transaction outputs.\n"
             "If no transaction outputs are specified when unlocking then all "
             "current locked transaction outputs are unlocked.\n"
             "A locked transaction output will not be chosen by automatic coin "
             "selection, when spending bitcoins.\n"
             "Locks are stored in memory only. Nodes start with zero locked "
             "outputs, and the locked output list\n"
             "is always cleared (by virtue of process exit) when a node stops "
             "or fails.\n"
             "Also see the listunspent call\n"
             "\nArguments:\n"
             "1. unlock            (boolean, required) Whether to unlock (true) "
             "or lock (false) the specified transactions\n"
             "2. \"transactions\"  (string, optional) A json array of objects. "
             "Each object the txid (string) vout (numeric)\n"
             "     [           (json array of json objects)\n"
             "       {\n"
             "         \"txid\":\"id\",    (string) The transaction id\n"
             "         \"vout\": n         (numeric) The output number\n"
             "       }\n"
             "       ,...\n"
             "     ]\n"
 
             "\nResult:\n"
             "true|false    (boolean) Whether the command was successful or "
             "not\n"
 
             "\nExamples:\n"
             "\nList the unspent transactions\n" +
             HelpExampleCli("listunspent", "") +
             "\nLock an unspent transaction\n" +
             HelpExampleCli("lockunspent", "false "
                                           "\"[{\\\"txid\\\":"
                                           "\\\"a08e6907dbbd3d809776dbfc5d82e371"
                                           "b764ed838b5655e72f463568df1aadf0\\\""
                                           ",\\\"vout\\\":1}]\"") +
             "\nList the locked transactions\n" +
             HelpExampleCli("listlockunspent", "") +
             "\nUnlock the transaction again\n" +
             HelpExampleCli("lockunspent", "true "
                                           "\"[{\\\"txid\\\":"
                                           "\\\"a08e6907dbbd3d809776dbfc5d82e371"
                                           "b764ed838b5655e72f463568df1aadf0\\\""
                                           ",\\\"vout\\\":1}]\"") +
             "\nAs a json rpc call\n" +
             HelpExampleRpc("lockunspent", "false, "
                                           "\"[{\\\"txid\\\":"
                                           "\\\"a08e6907dbbd3d809776dbfc5d82e371"
                                           "b764ed838b5655e72f463568df1aadf0\\\""
                                           ",\\\"vout\\\":1}]\""));
     }
 
     LOCK2(cs_main, pwallet->cs_wallet);
 
     if (request.params.size() == 1) {
         RPCTypeCheck(request.params, {UniValue::VBOOL});
     } else {
         RPCTypeCheck(request.params, {UniValue::VBOOL, UniValue::VARR});
     }
 
     bool fUnlock = request.params[0].get_bool();
 
     if (request.params.size() == 1) {
         if (fUnlock) {
             pwallet->UnlockAllCoins();
         }
         return true;
     }
 
     UniValue outputs = request.params[1].get_array();
     for (size_t idx = 0; idx < outputs.size(); idx++) {
         const UniValue &output = outputs[idx];
         if (!output.isObject()) {
             throw JSONRPCError(RPC_INVALID_PARAMETER,
                                "Invalid parameter, expected object");
         }
         const UniValue &o = output.get_obj();
 
         RPCTypeCheckObj(o,
                         {
                             {"txid", UniValueType(UniValue::VSTR)},
                             {"vout", UniValueType(UniValue::VNUM)},
                         });
 
         std::string txid = find_value(o, "txid").get_str();
         if (!IsHex(txid)) {
             throw JSONRPCError(RPC_INVALID_PARAMETER,
                                "Invalid parameter, expected hex txid");
         }
 
         int nOutput = find_value(o, "vout").get_int();
         if (nOutput < 0) {
             throw JSONRPCError(RPC_INVALID_PARAMETER,
                                "Invalid parameter, vout must be positive");
         }
 
         COutPoint outpt(uint256S(txid), nOutput);
 
         if (fUnlock) {
             pwallet->UnlockCoin(outpt);
         } else {
             pwallet->LockCoin(outpt);
         }
     }
 
     return true;
 }
 
 static UniValue listlockunspent(const Config &config,
                                 const JSONRPCRequest &request) {
     CWallet *const pwallet = GetWalletForJSONRPCRequest(request);
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
     }
 
     if (request.fHelp || request.params.size() > 0) {
         throw std::runtime_error(
             "listlockunspent\n"
             "\nReturns list of temporarily unspendable outputs.\n"
             "See the lockunspent call to lock and unlock transactions for "
             "spending.\n"
             "\nResult:\n"
             "[\n"
             "  {\n"
             "    \"txid\" : \"transactionid\",     (string) The transaction id "
             "locked\n"
             "    \"vout\" : n                      (numeric) The vout value\n"
             "  }\n"
             "  ,...\n"
             "]\n"
             "\nExamples:\n"
             "\nList the unspent transactions\n" +
             HelpExampleCli("listunspent", "") +
             "\nLock an unspent transaction\n" +
             HelpExampleCli("lockunspent", "false "
                                           "\"[{\\\"txid\\\":"
                                           "\\\"a08e6907dbbd3d809776dbfc5d82e371"
                                           "b764ed838b5655e72f463568df1aadf0\\\""
                                           ",\\\"vout\\\":1}]\"") +
             "\nList the locked transactions\n" +
             HelpExampleCli("listlockunspent", "") +
             "\nUnlock the transaction again\n" +
             HelpExampleCli("lockunspent", "true "
                                           "\"[{\\\"txid\\\":"
                                           "\\\"a08e6907dbbd3d809776dbfc5d82e371"
                                           "b764ed838b5655e72f463568df1aadf0\\\""
                                           ",\\\"vout\\\":1}]\"") +
             "\nAs a json rpc call\n" + HelpExampleRpc("listlockunspent", ""));
     }
 
     LOCK2(cs_main, pwallet->cs_wallet);
 
     std::vector<COutPoint> vOutpts;
     pwallet->ListLockedCoins(vOutpts);
 
     UniValue ret(UniValue::VARR);
 
     for (COutPoint &outpt : vOutpts) {
         UniValue o(UniValue::VOBJ);
 
         o.push_back(Pair("txid", outpt.hash.GetHex()));
         o.push_back(Pair("vout", (int)outpt.n));
         ret.push_back(o);
     }
 
     return ret;
 }
 
 static UniValue settxfee(const Config &config, const JSONRPCRequest &request) {
     CWallet *const pwallet = GetWalletForJSONRPCRequest(request);
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
     }
 
     if (request.fHelp || request.params.size() < 1 ||
         request.params.size() > 1) {
         throw std::runtime_error(
             "settxfee amount\n"
             "\nSet the transaction fee per kB. Overwrites the paytxfee "
             "parameter.\n"
             "\nArguments:\n"
             "1. amount         (numeric or string, required) The transaction "
             "fee in " +
             CURRENCY_UNIT +
             "/kB\n"
             "\nResult\n"
             "true|false        (boolean) Returns true if successful\n"
             "\nExamples:\n" +
             HelpExampleCli("settxfee", "0.00001") +
             HelpExampleRpc("settxfee", "0.00001"));
     }
 
     LOCK2(cs_main, pwallet->cs_wallet);
 
     // Amount
     Amount nAmount = AmountFromValue(request.params[0]);
 
     payTxFee = CFeeRate(nAmount, 1000);
     return true;
 }
 
 static UniValue getwalletinfo(const Config &config,
                               const JSONRPCRequest &request) {
     CWallet *const pwallet = GetWalletForJSONRPCRequest(request);
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
     }
 
     if (request.fHelp || request.params.size() != 0) {
         throw std::runtime_error(
             "getwalletinfo\n"
             "Returns an object containing various wallet state info.\n"
             "\nResult:\n"
             "{\n"
             "  \"walletversion\": xxxxx,          (numeric) the wallet "
             "version\n"
             "  \"balance\": xxxxxxx,              (numeric) the total "
             "confirmed balance of the wallet in " +
             CURRENCY_UNIT + "\n"
                             "  \"unconfirmed_balance\": xxx,      (numeric) "
                             "the total unconfirmed balance of the wallet in " +
             CURRENCY_UNIT + "\n"
                             "  \"immature_balance\": xxxxxx,      (numeric) "
                             "the total immature balance of the wallet in " +
             CURRENCY_UNIT +
             "\n"
             "  \"txcount\": xxxxxxx,              (numeric) the total number "
             "of transactions in the wallet\n"
             "  \"keypoololdest\": xxxxxx,         (numeric) the timestamp "
             "(seconds since Unix epoch) of the oldest pre-generated key in the "
             "key pool\n"
             "  \"keypoolsize\": xxxx,             (numeric) how many new keys "
             "are pre-generated (only counts external keys)\n"
             "  \"keypoolsize_hd_internal\": xxxx, (numeric) how many new keys "
             "are pre-generated for internal use (used for change outputs, only "
             "appears if the wallet is using this feature, otherwise external "
             "keys are used)\n"
             "  \"unlocked_until\": ttt,           (numeric) the timestamp in "
             "seconds since epoch (midnight Jan 1 1970 GMT) that the wallet is "
             "unlocked for transfers, or 0 if the wallet is locked\n"
             "  \"paytxfee\": x.xxxx,              (numeric) the transaction "
             "fee configuration, set in " +
             CURRENCY_UNIT + "/kB\n"
                             "  \"hdmasterkeyid\": \"<hash160>\"     (string) "
                             "the Hash160 of the HD master pubkey\n"
                             "}\n"
                             "\nExamples:\n" +
             HelpExampleCli("getwalletinfo", "") +
             HelpExampleRpc("getwalletinfo", ""));
     }
 
     LOCK2(cs_main, pwallet->cs_wallet);
 
     UniValue obj(UniValue::VOBJ);
 
     size_t kpExternalSize = pwallet->KeypoolCountExternalKeys();
     obj.push_back(Pair("walletversion", pwallet->GetVersion()));
     obj.push_back(Pair("balance", ValueFromAmount(pwallet->GetBalance())));
     obj.push_back(Pair("unconfirmed_balance",
                        ValueFromAmount(pwallet->GetUnconfirmedBalance())));
     obj.push_back(Pair("immature_balance",
                        ValueFromAmount(pwallet->GetImmatureBalance())));
     obj.push_back(Pair("txcount", (int)pwallet->mapWallet.size()));
     obj.push_back(Pair("keypoololdest", pwallet->GetOldestKeyPoolTime()));
     obj.push_back(Pair("keypoolsize", (int64_t)kpExternalSize));
     CKeyID masterKeyID = pwallet->GetHDChain().masterKeyID;
     if (!masterKeyID.IsNull() && pwallet->CanSupportFeature(FEATURE_HD_SPLIT)) {
         obj.push_back(
             Pair("keypoolsize_hd_internal",
                  int64_t(pwallet->GetKeyPoolSize() - kpExternalSize)));
     }
     if (pwallet->IsCrypted()) {
         obj.push_back(Pair("unlocked_until", pwallet->nRelockTime));
     }
     obj.push_back(Pair("paytxfee", ValueFromAmount(payTxFee.GetFeePerK())));
     if (!masterKeyID.IsNull()) {
         obj.push_back(Pair("hdmasterkeyid", masterKeyID.GetHex()));
     }
     return obj;
 }
 
 static UniValue resendwallettransactions(const Config &config,
                                          const JSONRPCRequest &request) {
     CWallet *const pwallet = GetWalletForJSONRPCRequest(request);
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
     }
 
     if (request.fHelp || request.params.size() != 0) {
         throw std::runtime_error(
             "resendwallettransactions\n"
             "Immediately re-broadcast unconfirmed wallet transactions to all "
             "peers.\n"
             "Intended only for testing; the wallet code periodically "
             "re-broadcasts\n"
             "automatically.\n"
             "Returns array of transaction ids that were re-broadcast.\n");
     }
 
     if (!g_connman) {
         throw JSONRPCError(
             RPC_CLIENT_P2P_DISABLED,
             "Error: Peer-to-peer functionality missing or disabled");
     }
 
     LOCK2(cs_main, pwallet->cs_wallet);
 
     std::vector<uint256> txids =
         pwallet->ResendWalletTransactionsBefore(GetTime(), g_connman.get());
     UniValue result(UniValue::VARR);
     for (const uint256 &txid : txids) {
         result.push_back(txid.ToString());
     }
 
     return result;
 }
 
 static UniValue listunspent(const Config &config,
                             const JSONRPCRequest &request) {
     CWallet *const pwallet = GetWalletForJSONRPCRequest(request);
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
     }
 
     if (request.fHelp || request.params.size() > 4) {
         throw std::runtime_error(
             "listunspent ( minconf maxconf  [\"addresses\",...] "
             "[include_unsafe] )\n"
             "\nReturns array of unspent transaction outputs\n"
             "with between minconf and maxconf (inclusive) confirmations.\n"
             "Optionally filter to only include txouts paid to specified "
             "addresses.\n"
             "\nArguments:\n"
             "1. minconf          (numeric, optional, default=1) The minimum "
             "confirmations to filter\n"
             "2. maxconf          (numeric, optional, default=9999999) The "
             "maximum confirmations to filter\n"
             "3. \"addresses\"    (string) A json array of bitcoin addresses to "
             "filter\n"
             "    [\n"
             "      \"address\"   (string) bitcoin address\n"
             "      ,...\n"
             "    ]\n"
             "4. include_unsafe (bool, optional, default=true) Include outputs "
             "that are not safe to spend\n"
             "                  because they come from unconfirmed untrusted "
             "transactions or unconfirmed\n"
             "                  replacement transactions (cases where we are "
             "less sure that a conflicting\n"
             "                  transaction won't be mined).\n"
             "\nResult\n"
             "[                   (array of json object)\n"
             "  {\n"
             "    \"txid\" : \"txid\",          (string) the transaction id \n"
             "    \"vout\" : n,               (numeric) the vout value\n"
             "    \"address\" : \"address\",    (string) the bitcoin address\n"
             "    \"account\" : \"account\",    (string) DEPRECATED. The "
             "associated account, or \"\" for the default account\n"
             "    \"scriptPubKey\" : \"key\",   (string) the script key\n"
             "    \"amount\" : x.xxx,         (numeric) the transaction output "
             "amount in " +
             CURRENCY_UNIT + "\n"
                             "    \"confirmations\" : n,      (numeric) The "
                             "number of confirmations\n"
                             "    \"redeemScript\" : n        (string) The "
                             "redeemScript if scriptPubKey is P2SH\n"
                             "    \"spendable\" : xxx,        (bool) Whether we "
                             "have the private keys to spend this output\n"
                             "    \"solvable\" : xxx          (bool) Whether we "
                             "know how to spend this output, ignoring the lack "
                             "of keys\n"
                             "  }\n"
                             "  ,...\n"
                             "]\n"
 
                             "\nExamples\n" +
             HelpExampleCli("listunspent", "") +
             HelpExampleCli("listunspent",
                            "6 9999999 "
                            "\"[\\\"1PGFqEzfmQch1gKD3ra4k18PNj3tTUUSqg\\\","
                            "\\\"1LtvqCaApEdUGFkpKMM4MstjcaL4dKg8SP\\\"]\"") +
             HelpExampleRpc("listunspent",
                            "6, 9999999 "
                            "\"[\\\"1PGFqEzfmQch1gKD3ra4k18PNj3tTUUSqg\\\","
                            "\\\"1LtvqCaApEdUGFkpKMM4MstjcaL4dKg8SP\\\"]\""));
     }
 
     int nMinDepth = 1;
     if (request.params.size() > 0 && !request.params[0].isNull()) {
         RPCTypeCheckArgument(request.params[0], UniValue::VNUM);
         nMinDepth = request.params[0].get_int();
     }
 
     int nMaxDepth = 9999999;
     if (request.params.size() > 1 && !request.params[1].isNull()) {
         RPCTypeCheckArgument(request.params[1], UniValue::VNUM);
         nMaxDepth = request.params[1].get_int();
     }
 
     std::set<CTxDestination> destinations;
     if (request.params.size() > 2 && !request.params[2].isNull()) {
         RPCTypeCheckArgument(request.params[2], UniValue::VARR);
         UniValue inputs = request.params[2].get_array();
         for (size_t idx = 0; idx < inputs.size(); idx++) {
             const UniValue &input = inputs[idx];
             CTxDestination dest = DecodeDestination(input.get_str());
             if (!IsValidDestination(dest)) {
                 throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY,
                                    std::string("Invalid Bitcoin address: ") +
                                        input.get_str());
             }
             if (!destinations.insert(dest).second) {
                 throw JSONRPCError(
                     RPC_INVALID_PARAMETER,
                     std::string("Invalid parameter, duplicated address: ") +
                         input.get_str());
             }
         }
     }
 
     bool include_unsafe = true;
     if (request.params.size() > 3 && !request.params[3].isNull()) {
         RPCTypeCheckArgument(request.params[3], UniValue::VBOOL);
         include_unsafe = request.params[3].get_bool();
     }
 
     UniValue results(UniValue::VARR);
     std::vector<COutput> vecOutputs;
     assert(pwallet != nullptr);
     LOCK2(cs_main, pwallet->cs_wallet);
     pwallet->AvailableCoins(vecOutputs, !include_unsafe, nullptr, true);
     for (const COutput &out : vecOutputs) {
         if (out.nDepth < nMinDepth || out.nDepth > nMaxDepth) {
             continue;
         }
 
         CTxDestination address;
         const CScript &scriptPubKey = out.tx->tx->vout[out.i].scriptPubKey;
         bool fValidAddress = ExtractDestination(scriptPubKey, address);
 
         if (destinations.size() &&
             (!fValidAddress || !destinations.count(address))) {
             continue;
         }
 
         UniValue entry(UniValue::VOBJ);
         entry.push_back(Pair("txid", out.tx->GetId().GetHex()));
         entry.push_back(Pair("vout", out.i));
 
         if (fValidAddress) {
             entry.push_back(Pair("address", EncodeDestination(address)));
 
             if (pwallet->mapAddressBook.count(address)) {
                 entry.push_back(
                     Pair("account", pwallet->mapAddressBook[address].name));
             }
 
             if (scriptPubKey.IsPayToScriptHash()) {
                 const CScriptID &hash = boost::get<CScriptID>(address);
                 CScript redeemScript;
                 if (pwallet->GetCScript(hash, redeemScript)) {
                     entry.push_back(
                         Pair("redeemScript",
                              HexStr(redeemScript.begin(), redeemScript.end())));
                 }
             }
         }
 
         entry.push_back(Pair("scriptPubKey",
                              HexStr(scriptPubKey.begin(), scriptPubKey.end())));
         entry.push_back(
             Pair("amount", ValueFromAmount(out.tx->tx->vout[out.i].nValue)));
         entry.push_back(Pair("confirmations", out.nDepth));
         entry.push_back(Pair("spendable", out.fSpendable));
         entry.push_back(Pair("solvable", out.fSolvable));
         results.push_back(entry);
     }
 
     return results;
 }
 
 static UniValue fundrawtransaction(const Config &config,
                                    const JSONRPCRequest &request) {
     CWallet *const pwallet = GetWalletForJSONRPCRequest(request);
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
     }
 
     if (request.fHelp || request.params.size() < 1 ||
         request.params.size() > 2) {
         throw std::runtime_error(
             "fundrawtransaction \"hexstring\" ( options )\n"
             "\nAdd inputs to a transaction until it has enough in value to "
             "meet its out value.\n"
             "This will not modify existing inputs, and will add at most one "
             "change output to the outputs.\n"
             "No existing outputs will be modified unless "
             "\"subtractFeeFromOutputs\" is specified.\n"
             "Note that inputs which were signed may need to be resigned after "
             "completion since in/outputs have been added.\n"
             "The inputs added will not be signed, use signrawtransaction for "
             "that.\n"
             "Note that all existing inputs must have their previous output "
             "transaction be in the wallet.\n"
             "Note that all inputs selected must be of standard form and P2SH "
             "scripts must be\n"
             "in the wallet using importaddress or addmultisigaddress (to "
             "calculate fees).\n"
             "You can see whether this is the case by checking the \"solvable\" "
             "field in the listunspent output.\n"
             "Only pay-to-pubkey, multisig, and P2SH versions thereof are "
             "currently supported for watch-only\n"
             "\nArguments:\n"
             "1. \"hexstring\"           (string, required) The hex string of "
             "the raw transaction\n"
             "2. options                 (object, optional)\n"
             "   {\n"
             "     \"changeAddress\"          (string, optional, default pool "
             "address) The bitcoin address to receive the change\n"
             "     \"changePosition\"         (numeric, optional, default "
             "random) The index of the change output\n"
             "     \"includeWatching\"        (boolean, optional, default "
             "false) Also select inputs which are watch only\n"
             "     \"lockUnspents\"           (boolean, optional, default "
             "false) Lock selected unspent outputs\n"
             "     \"reserveChangeKey\"       (boolean, optional, default true) "
             "Reserves the change output key from the keypool\n"
             "     \"feeRate\"                (numeric, optional, default not "
             "set: makes wallet determine the fee) Set a specific feerate (" +
             CURRENCY_UNIT +
             " per KB)\n"
             "     \"subtractFeeFromOutputs\" (array, optional) A json array of "
             "integers.\n"
             "                              The fee will be equally deducted "
             "from the amount of each specified output.\n"
             "                              The outputs are specified by their "
             "zero-based index, before any change output is added.\n"
             "                              Those recipients will receive less "
             "bitcoins than you enter in their corresponding amount field.\n"
             "                              If no outputs are specified here, "
             "the sender pays the fee.\n"
             "                                  [vout_index,...]\n"
             "   }\n"
             "                         for backward compatibility: passing in a "
             "true instead of an object will result in "
             "{\"includeWatching\":true}\n"
             "\nResult:\n"
             "{\n"
             "  \"hex\":       \"value\", (string)  The resulting raw "
             "transaction (hex-encoded string)\n"
             "  \"fee\":       n,         (numeric) Fee in " +
             CURRENCY_UNIT + " the resulting transaction pays\n"
                             "  \"changepos\": n          (numeric) The "
                             "position of the added change output, or -1\n"
                             "}\n"
                             "\nExamples:\n"
                             "\nCreate a transaction with no inputs\n" +
             HelpExampleCli("createrawtransaction",
                            "\"[]\" \"{\\\"myaddress\\\":0.01}\"") +
             "\nAdd sufficient unsigned inputs to meet the output value\n" +
             HelpExampleCli("fundrawtransaction", "\"rawtransactionhex\"") +
             "\nSign the transaction\n" +
             HelpExampleCli("signrawtransaction", "\"fundedtransactionhex\"") +
             "\nSend the transaction\n" +
             HelpExampleCli("sendrawtransaction", "\"signedtransactionhex\""));
     }
 
     RPCTypeCheck(request.params, {UniValue::VSTR});
 
     CTxDestination changeAddress = CNoDestination();
     int changePosition = -1;
     bool includeWatching = false;
     bool lockUnspents = false;
     bool reserveChangeKey = true;
     CFeeRate feeRate = CFeeRate(Amount(0));
     bool overrideEstimatedFeerate = false;
     UniValue subtractFeeFromOutputs;
     std::set<int> setSubtractFeeFromOutputs;
 
     if (request.params.size() > 1) {
         if (request.params[1].type() == UniValue::VBOOL) {
             // backward compatibility bool only fallback
             includeWatching = request.params[1].get_bool();
         } else {
             RPCTypeCheck(request.params, {UniValue::VSTR, UniValue::VOBJ});
 
             UniValue options = request.params[1];
 
             RPCTypeCheckObj(
                 options,
                 {
                     {"changeAddress", UniValueType(UniValue::VSTR)},
                     {"changePosition", UniValueType(UniValue::VNUM)},
                     {"includeWatching", UniValueType(UniValue::VBOOL)},
                     {"lockUnspents", UniValueType(UniValue::VBOOL)},
                     {"reserveChangeKey", UniValueType(UniValue::VBOOL)},
                     // will be checked below
                     {"feeRate", UniValueType()},
                     {"subtractFeeFromOutputs", UniValueType(UniValue::VARR)},
                 },
                 true, true);
 
             if (options.exists("changeAddress")) {
                 CTxDestination dest =
                     DecodeDestination(options["changeAddress"].get_str());
 
                 if (!IsValidDestination(dest)) {
                     throw JSONRPCError(
                         RPC_INVALID_ADDRESS_OR_KEY,
                         "changeAddress must be a valid bitcoin address");
                 }
 
                 changeAddress = dest;
             }
 
             if (options.exists("changePosition")) {
                 changePosition = options["changePosition"].get_int();
             }
 
             if (options.exists("includeWatching")) {
                 includeWatching = options["includeWatching"].get_bool();
             }
 
             if (options.exists("lockUnspents")) {
                 lockUnspents = options["lockUnspents"].get_bool();
             }
 
             if (options.exists("reserveChangeKey")) {
                 reserveChangeKey = options["reserveChangeKey"].get_bool();
             }
 
             if (options.exists("feeRate")) {
                 feeRate = CFeeRate(AmountFromValue(options["feeRate"]));
                 overrideEstimatedFeerate = true;
             }
 
             if (options.exists("subtractFeeFromOutputs")) {
                 subtractFeeFromOutputs =
                     options["subtractFeeFromOutputs"].get_array();
             }
         }
     }
 
     // parse hex string from parameter
     CMutableTransaction tx;
     if (!DecodeHexTx(tx, request.params[0].get_str())) {
         throw JSONRPCError(RPC_DESERIALIZATION_ERROR, "TX decode failed");
     }
 
     if (tx.vout.size() == 0) {
         throw JSONRPCError(RPC_INVALID_PARAMETER,
                            "TX must have at least one output");
     }
 
     if (changePosition != -1 &&
         (changePosition < 0 || (unsigned int)changePosition > tx.vout.size())) {
         throw JSONRPCError(RPC_INVALID_PARAMETER,
                            "changePosition out of bounds");
     }
 
     for (size_t idx = 0; idx < subtractFeeFromOutputs.size(); idx++) {
         int pos = subtractFeeFromOutputs[idx].get_int();
         if (setSubtractFeeFromOutputs.count(pos)) {
             throw JSONRPCError(
                 RPC_INVALID_PARAMETER,
                 strprintf("Invalid parameter, duplicated position: %d", pos));
         }
         if (pos < 0) {
             throw JSONRPCError(
                 RPC_INVALID_PARAMETER,
                 strprintf("Invalid parameter, negative position: %d", pos));
         }
         if (pos >= int(tx.vout.size())) {
             throw JSONRPCError(
                 RPC_INVALID_PARAMETER,
                 strprintf("Invalid parameter, position too large: %d", pos));
         }
         setSubtractFeeFromOutputs.insert(pos);
     }
 
     Amount nFeeOut;
     std::string strFailReason;
 
     if (!pwallet->FundTransaction(
             tx, nFeeOut, overrideEstimatedFeerate, feeRate, changePosition,
             strFailReason, includeWatching, lockUnspents,
             setSubtractFeeFromOutputs, reserveChangeKey, changeAddress)) {
         throw JSONRPCError(RPC_WALLET_ERROR, strFailReason);
     }
 
     UniValue result(UniValue::VOBJ);
     result.push_back(Pair("hex", EncodeHexTx(tx)));
     result.push_back(Pair("changepos", changePosition));
     result.push_back(Pair("fee", ValueFromAmount(nFeeOut)));
 
     return result;
 }
 
 static UniValue generate(const Config &config, const JSONRPCRequest &request) {
     CWallet *const pwallet = GetWalletForJSONRPCRequest(request);
 
     if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
         return NullUniValue;
     }
 
     if (request.fHelp || request.params.size() < 1 ||
         request.params.size() > 2) {
         throw std::runtime_error(
             "generate nblocks ( maxtries )\n"
             "\nMine up to nblocks blocks immediately (before the RPC call "
             "returns) to an address in the wallet.\n"
             "\nArguments:\n"
             "1. nblocks      (numeric, required) How many blocks are generated "
             "immediately.\n"
             "2. maxtries     (numeric, optional) How many iterations to try "
             "(default = 1000000).\n"
             "\nResult:\n"
             "[ blockhashes ]     (array) hashes of blocks generated\n"
             "\nExamples:\n"
             "\nGenerate 11 blocks\n" +
             HelpExampleCli("generate", "11"));
     }
 
     int num_generate = request.params[0].get_int();
     uint64_t max_tries = 1000000;
     if (request.params.size() > 1 && !request.params[1].isNull()) {
         max_tries = request.params[1].get_int();
     }
 
     std::shared_ptr<CReserveScript> coinbase_script;
     pwallet->GetScriptForMining(coinbase_script);
 
     // If the keypool is exhausted, no script is returned at all.  Catch this.
     if (!coinbase_script) {
         throw JSONRPCError(
             RPC_WALLET_KEYPOOL_RAN_OUT,
             "Error: Keypool ran out, please call keypoolrefill first");
     }
 
     // throw an error if no script was provided
     if (coinbase_script->reserveScript.empty()) {
         throw JSONRPCError(RPC_INTERNAL_ERROR, "No coinbase script available");
     }
 
     return generateBlocks(config, coinbase_script, num_generate, max_tries,
                           true);
 }
 
 // clang-format off
 static const CRPCCommand commands[] = {
     //  category            name                        actor (function)          okSafeMode
     //  ------------------- ------------------------    ----------------------    ----------
     { "rawtransactions",    "fundrawtransaction",       fundrawtransaction,       false,  {"hexstring","options"} },
     { "hidden",             "resendwallettransactions", resendwallettransactions, true,   {} },
     { "wallet",             "abandontransaction",       abandontransaction,       false,  {"txid"} },
     { "wallet",             "addmultisigaddress",       addmultisigaddress,       true,   {"nrequired","keys","account"} },
     { "wallet",             "backupwallet",             backupwallet,             true,   {"destination"} },
     { "wallet",             "encryptwallet",            encryptwallet,            true,   {"passphrase"} },
     { "wallet",             "getaccountaddress",        getaccountaddress,        true,   {"account"} },
     { "wallet",             "getaccount",               getaccount,               true,   {"address"} },
     { "wallet",             "getaddressesbyaccount",    getaddressesbyaccount,    true,   {"account"} },
     { "wallet",             "getbalance",               getbalance,               false,  {"account","minconf","include_watchonly"} },
     { "wallet",             "getnewaddress",            getnewaddress,            true,   {"account"} },
     { "wallet",             "getrawchangeaddress",      getrawchangeaddress,      true,   {} },
     { "wallet",             "getreceivedbyaccount",     getreceivedbyaccount,     false,  {"account","minconf"} },
     { "wallet",             "getreceivedbyaddress",     getreceivedbyaddress,     false,  {"address","minconf"} },
     { "wallet",             "gettransaction",           gettransaction,           false,  {"txid","include_watchonly"} },
     { "wallet",             "getunconfirmedbalance",    getunconfirmedbalance,    false,  {} },
     { "wallet",             "getwalletinfo",            getwalletinfo,            false,  {} },
     { "wallet",             "keypoolrefill",            keypoolrefill,            true,   {"newsize"} },
     { "wallet",             "listaccounts",             listaccounts,             false,  {"minconf","include_watchonly"} },
     { "wallet",             "listaddressgroupings",     listaddressgroupings,     false,  {} },
     { "wallet",             "listlockunspent",          listlockunspent,          false,  {} },
     { "wallet",             "listreceivedbyaccount",    listreceivedbyaccount,    false,  {"minconf","include_empty","include_watchonly"} },
     { "wallet",             "listreceivedbyaddress",    listreceivedbyaddress,    false,  {"minconf","include_empty","include_watchonly"} },
     { "wallet",             "listsinceblock",           listsinceblock,           false,  {"blockhash","target_confirmations","include_watchonly"} },
     { "wallet",             "listtransactions",         listtransactions,         false,  {"account","count","skip","include_watchonly"} },
     { "wallet",             "listunspent",              listunspent,              false,  {"minconf","maxconf","addresses","include_unsafe"} },
     { "wallet",             "lockunspent",              lockunspent,              true,   {"unlock","transactions"} },
     { "wallet",             "move",                     movecmd,                  false,  {"fromaccount","toaccount","amount","minconf","comment"} },
     { "wallet",             "sendfrom",                 sendfrom,                 false,  {"fromaccount","toaddress","amount","minconf","comment","comment_to"} },
     { "wallet",             "sendmany",                 sendmany,                 false,  {"fromaccount","amounts","minconf","comment","subtractfeefrom"} },
     { "wallet",             "sendtoaddress",            sendtoaddress,            false,  {"address","amount","comment","comment_to","subtractfeefromamount"} },
     { "wallet",             "setaccount",               setaccount,               true,   {"address","account"} },
     { "wallet",             "settxfee",                 settxfee,                 true,   {"amount"} },
     { "wallet",             "signmessage",              signmessage,              true,   {"address","message"} },
     { "wallet",             "walletlock",               walletlock,               true,   {} },
     { "wallet",             "walletpassphrasechange",   walletpassphrasechange,   true,   {"oldpassphrase","newpassphrase"} },
     { "wallet",             "walletpassphrase",         walletpassphrase,         true,   {"passphrase","timeout"} },
 
     { "generating",         "generate",                 &generate,                 true,   {"nblocks","maxtries"} },
 };
 // clang-format on
 
 void RegisterWalletRPCCommands(CRPCTable &t) {
     if (GetBoolArg("-disablewallet", false)) {
         return;
     }
 
     for (unsigned int vcidx = 0; vcidx < ARRAYLEN(commands); vcidx++) {
         t.appendCommand(commands[vcidx].name, &commands[vcidx]);
     }
 }