Merge #9902: Lightweight abstraction of boost::filesystem

f110272 Remove `namespace fs=fs` (Wladimir J. van der Laan)
75594bd torcontrol: Use fs::path instead of std::string for private key path (Wladimir J. van der Laan)
2a5f574 Use fsbridge for fopen and freopen (Wladimir J. van der Laan)
bac5c9c Replace uses of boost::filesystem with fs (Wladimir J. van der Laan)
7d5172d Replace includes of boost/filesystem.h with fs.h (Wladimir J. van der Laan)
19e36bb Add fs.cpp/h (Wladimir J. van der Laan)

Tree-SHA512: 2c34f059dfa6850b9323f3389e9090a6b5f839a457a2960d182c2ecfafd9883c956f5928bb796613402d3aad68ebc78259796a7a313f4a6cfa98aaf507a66842

34 files changed, 233 insertions, 207 deletions

diff --git a/src/Makefile.am b/src/Makefile.am
index 30d027315a..8680546b99 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -98,6 +98,7 @@ BITCOIN_CORE_H = \
   core_io.h \
   core_memusage.h \
   cuckoocache.h \
+  fs.h \
   httprpc.h \
   httpserver.h \
   indirectmap.h \
@@ -326,6 +327,7 @@ libbitcoin_util_a_SOURCES = \
   compat/glibc_sanity.cpp \
   compat/glibcxx_sanity.cpp \
   compat/strnlen.cpp \
+  fs.cpp \
   random.cpp \
   rpc/protocol.cpp \
   support/cleanse.cpp \
diff --git a/src/addrdb.cpp b/src/addrdb.cpp
index 224d3921cc..a3743cd0d4 100644
--- a/src/addrdb.cpp
+++ b/src/addrdb.cpp
@@ -8,13 +8,13 @@
 #include "addrman.h"
 #include "chainparams.h"
 #include "clientversion.h"
+#include "fs.h"
 #include "hash.h"
 #include "random.h"
 #include "streams.h"
 #include "tinyformat.h"
 #include "util.h"
 
-#include <boost/filesystem.hpp>
 
 CBanDB::CBanDB()
 {
@@ -36,8 +36,8 @@ bool CBanDB::Write(const banmap_t& banSet)
     ssBanlist << hash;
 
     // open temp output file, and associate with CAutoFile
-    boost::filesystem::path pathTmp = GetDataDir() / tmpfn;
-    FILE *file = fopen(pathTmp.string().c_str(), "wb");
+    fs::path pathTmp = GetDataDir() / tmpfn;
+    FILE *file = fsbridge::fopen(pathTmp, "wb");
     CAutoFile fileout(file, SER_DISK, CLIENT_VERSION);
     if (fileout.IsNull())
         return error("%s: Failed to open file %s", __func__, pathTmp.string());
@@ -62,13 +62,13 @@ bool CBanDB::Write(const banmap_t& banSet)
 bool CBanDB::Read(banmap_t& banSet)
 {
     // open input file, and associate with CAutoFile
-    FILE *file = fopen(pathBanlist.string().c_str(), "rb");
+    FILE *file = fsbridge::fopen(pathBanlist, "rb");
     CAutoFile filein(file, SER_DISK, CLIENT_VERSION);
     if (filein.IsNull())
         return error("%s: Failed to open file %s", __func__, pathBanlist.string());
 
     // use file size to size memory buffer
-    uint64_t fileSize = boost::filesystem::file_size(pathBanlist);
+    uint64_t fileSize = fs::file_size(pathBanlist);
     uint64_t dataSize = 0;
     // Don't try to resize to a negative number if file is small
     if (fileSize >= sizeof(uint256))
@@ -133,8 +133,8 @@ bool CAddrDB::Write(const CAddrMan& addr)
     ssPeers << hash;
 
     // open temp output file, and associate with CAutoFile
-    boost::filesystem::path pathTmp = GetDataDir() / tmpfn;
-    FILE *file = fopen(pathTmp.string().c_str(), "wb");
+    fs::path pathTmp = GetDataDir() / tmpfn;
+    FILE *file = fsbridge::fopen(pathTmp, "wb");
     CAutoFile fileout(file, SER_DISK, CLIENT_VERSION);
     if (fileout.IsNull())
         return error("%s: Failed to open file %s", __func__, pathTmp.string());
@@ -159,13 +159,13 @@ bool CAddrDB::Write(const CAddrMan& addr)
 bool CAddrDB::Read(CAddrMan& addr)
 {
     // open input file, and associate with CAutoFile
-    FILE *file = fopen(pathAddr.string().c_str(), "rb");
+    FILE *file = fsbridge::fopen(pathAddr, "rb");
     CAutoFile filein(file, SER_DISK, CLIENT_VERSION);
     if (filein.IsNull())
         return error("%s: Failed to open file %s", __func__, pathAddr.string());
 
     // use file size to size memory buffer
-    uint64_t fileSize = boost::filesystem::file_size(pathAddr);
+    uint64_t fileSize = fs::file_size(pathAddr);
     uint64_t dataSize = 0;
     // Don't try to resize to a negative number if file is small
     if (fileSize >= sizeof(uint256))
diff --git a/src/addrdb.h b/src/addrdb.h
index ab985b10cb..c3d509bd3a 100644
--- a/src/addrdb.h
+++ b/src/addrdb.h
@@ -6,11 +6,11 @@
 #ifndef BITCOIN_ADDRDB_H
 #define BITCOIN_ADDRDB_H
 
+#include "fs.h"
 #include "serialize.h"
 
 #include <string>
 #include <map>
-#include <boost/filesystem/path.hpp>
 
 class CSubNet;
 class CAddrMan;
@@ -80,7 +80,7 @@ typedef std::map<CSubNet, CBanEntry> banmap_t;
 class CAddrDB
 {
 private:
-    boost::filesystem::path pathAddr;
+    fs::path pathAddr;
 public:
     CAddrDB();
     bool Write(const CAddrMan& addr);
@@ -92,7 +92,7 @@ public:
 class CBanDB
 {
 private:
-    boost::filesystem::path pathBanlist;
+    fs::path pathBanlist;
 public:
     CBanDB();
     bool Write(const banmap_t& banSet);
diff --git a/src/bitcoin-cli.cpp b/src/bitcoin-cli.cpp
index ed8ca7e14c..5edd43d41e 100644
--- a/src/bitcoin-cli.cpp
+++ b/src/bitcoin-cli.cpp
@@ -9,12 +9,12 @@
 
 #include "chainparamsbase.h"
 #include "clientversion.h"
+#include "fs.h"
 #include "rpc/client.h"
 #include "rpc/protocol.h"
 #include "util.h"
 #include "utilstrencodings.h"
 
-#include <boost/filesystem/operations.hpp>
 #include <stdio.h>
 
 #include <event2/buffer.h>
@@ -96,7 +96,7 @@ static int AppInitRPC(int argc, char* argv[])
         }
         return EXIT_SUCCESS;
     }
-    if (!boost::filesystem::is_directory(GetDataDir(false))) {
+    if (!fs::is_directory(GetDataDir(false))) {
         fprintf(stderr, "Error: Specified data directory \"%s\" does not exist.\n", GetArg("-datadir", "").c_str());
         return EXIT_FAILURE;
     }
diff --git a/src/bitcoind.cpp b/src/bitcoind.cpp
index a3d02afcdb..31680a8ec7 100644
--- a/src/bitcoind.cpp
+++ b/src/bitcoind.cpp
@@ -10,6 +10,7 @@
 #include "chainparams.h"
 #include "clientversion.h"
 #include "compat.h"
+#include "fs.h"
 #include "rpc/server.h"
 #include "init.h"
 #include "noui.h"
@@ -20,7 +21,6 @@
 #include "utilstrencodings.h"
 
 #include <boost/algorithm/string/predicate.hpp>
-#include <boost/filesystem.hpp>
 #include <boost/thread.hpp>
 
 #include <stdio.h>
@@ -97,7 +97,7 @@ bool AppInit(int argc, char* argv[])
 
     try
     {
-        if (!boost::filesystem::is_directory(GetDataDir(false)))
+        if (!fs::is_directory(GetDataDir(false)))
         {
             fprintf(stderr, "Error: Specified data directory \"%s\" does not exist.\n", GetArg("-datadir", "").c_str());
             return false;
diff --git a/src/dbwrapper.cpp b/src/dbwrapper.cpp
index 01fcd07420..3d2098c059 100644
--- a/src/dbwrapper.cpp
+++ b/src/dbwrapper.cpp
@@ -4,11 +4,10 @@
 
 #include "dbwrapper.h"
 
+#include "fs.h"
 #include "util.h"
 #include "random.h"
 
-#include <boost/filesystem.hpp>
-
 #include <leveldb/cache.h>
 #include <leveldb/env.h>
 #include <leveldb/filter_policy.h>
@@ -91,7 +90,7 @@ static leveldb::Options GetOptions(size_t nCacheSize)
     return options;
 }
 
-CDBWrapper::CDBWrapper(const boost::filesystem::path& path, size_t nCacheSize, bool fMemory, bool fWipe, bool obfuscate)
+CDBWrapper::CDBWrapper(const fs::path& path, size_t nCacheSize, bool fMemory, bool fWipe, bool obfuscate)
 {
     penv = NULL;
     readoptions.verify_checksums = true;
diff --git a/src/dbwrapper.h b/src/dbwrapper.h
index 414df76a7c..b13e98b7a4 100644
--- a/src/dbwrapper.h
+++ b/src/dbwrapper.h
@@ -6,14 +6,13 @@
 #define BITCOIN_DBWRAPPER_H
 
 #include "clientversion.h"
+#include "fs.h"
 #include "serialize.h"
 #include "streams.h"
 #include "util.h"
 #include "utilstrencodings.h"
 #include "version.h"
 
-#include <boost/filesystem/path.hpp>
-
 #include <leveldb/db.h>
 #include <leveldb/write_batch.h>
 
@@ -195,7 +194,7 @@ public:
      * @param[in] obfuscate   If true, store data obfuscated via simple XOR. If false, XOR
      *                        with a zero'd byte array.
      */
-    CDBWrapper(const boost::filesystem::path& path, size_t nCacheSize, bool fMemory = false, bool fWipe = false, bool obfuscate = false);
+    CDBWrapper(const fs::path& path, size_t nCacheSize, bool fMemory = false, bool fWipe = false, bool obfuscate = false);
     ~CDBWrapper();
 
     template <typename K, typename V>
diff --git a/src/fs.cpp b/src/fs.cpp
new file mode 100644
index 0000000000..6f2b768de3
--- /dev/null
+++ b/src/fs.cpp
@@ -0,0 +1,17 @@
+#include "fs.h"
+
+#include <boost/filesystem.hpp>
+
+namespace fsbridge {
+
+FILE *fopen(const fs::path& p, const char *mode)
+{
+    return ::fopen(p.string().c_str(), mode);
+}
+
+FILE *freopen(const fs::path& p, const char *mode, FILE *stream)
+{
+    return ::freopen(p.string().c_str(), mode, stream);
+}
+
+} // fsbridge
diff --git a/src/fs.h b/src/fs.h
new file mode 100644
index 0000000000..585cbf9c38
--- /dev/null
+++ b/src/fs.h
@@ -0,0 +1,24 @@
+// Copyright (c) 2017 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_FS_H
+#define BITCOIN_FS_H
+
+#include <stdio.h>
+#include <string>
+
+#include <boost/filesystem.hpp>
+#include <boost/filesystem/fstream.hpp>
+#include <boost/filesystem/detail/utf8_codecvt_facet.hpp>
+
+/** Filesystem operations and types */
+namespace fs = boost::filesystem;
+
+/** Bridge operations to C stdio */
+namespace fsbridge {
+    FILE *fopen(const fs::path& p, const char *mode);
+    FILE *freopen(const fs::path& p, const char *mode, FILE *stream);
+};
+
+#endif
diff --git a/src/init.cpp b/src/init.cpp
index 315be8b697..1e7e388a52 100644
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -16,6 +16,7 @@
 #include "checkpoints.h"
 #include "compat/sanity.h"
 #include "consensus/validation.h"
+#include "fs.h"
 #include "httpserver.h"
 #include "httprpc.h"
 #include "key.h"
@@ -56,7 +57,6 @@
 #include <boost/algorithm/string/replace.hpp>
 #include <boost/algorithm/string/split.hpp>
 #include <boost/bind.hpp>
-#include <boost/filesystem.hpp>
 #include <boost/function.hpp>
 #include <boost/interprocess/sync/file_lock.hpp>
 #include <boost/thread.hpp>
@@ -212,8 +212,8 @@ void Shutdown()
 
     if (fFeeEstimatesInitialized)
     {
-        boost::filesystem::path est_path = GetDataDir() / FEE_ESTIMATES_FILENAME;
-        CAutoFile est_fileout(fopen(est_path.string().c_str(), "wb"), SER_DISK, CLIENT_VERSION);
+        fs::path est_path = GetDataDir() / FEE_ESTIMATES_FILENAME;
+        CAutoFile est_fileout(fsbridge::fopen(est_path, "wb"), SER_DISK, CLIENT_VERSION);
         if (!est_fileout.IsNull())
             mempool.WriteFeeEstimates(est_fileout);
         else
@@ -250,8 +250,8 @@ void Shutdown()
 
 #ifndef WIN32
     try {
-        boost::filesystem::remove(GetPidFile());
-    } catch (const boost::filesystem::filesystem_error& e) {
+        fs::remove(GetPidFile());
+    } catch (const fs::filesystem_error& e) {
         LogPrintf("%s: Unable to remove pidfile: %s\n", __func__, e.what());
     }
 #endif
@@ -577,14 +577,14 @@ struct CImportingNow
 // works correctly.
 void CleanupBlockRevFiles()
 {
-    std::map<std::string, boost::filesystem::path> mapBlockFiles;
+    std::map<std::string, fs::path> mapBlockFiles;
 
     // Glob all blk?????.dat and rev?????.dat files from the blocks directory.
     // Remove the rev files immediately and insert the blk file paths into an
     // ordered map keyed by block file index.
     LogPrintf("Removing unusable blk?????.dat and rev?????.dat files for -reindex with -prune\n");
-    boost::filesystem::path blocksdir = GetDataDir() / "blocks";
-    for (boost::filesystem::directory_iterator it(blocksdir); it != boost::filesystem::directory_iterator(); it++) {
+    fs::path blocksdir = GetDataDir() / "blocks";
+    for (fs::directory_iterator it(blocksdir); it != fs::directory_iterator(); it++) {
         if (is_regular_file(*it) &&
             it->path().filename().string().length() == 12 &&
             it->path().filename().string().substr(8,4) == ".dat")
@@ -601,7 +601,7 @@ void CleanupBlockRevFiles()
     // keeping a separate counter.  Once we hit a gap (or if 0 doesn't exist)
     // start removing block files.
     int nContigCounter = 0;
-    BOOST_FOREACH(const PAIRTYPE(std::string, boost::filesystem::path)& item, mapBlockFiles) {
+    BOOST_FOREACH(const PAIRTYPE(std::string, fs::path)& item, mapBlockFiles) {
         if (atoi(item.first) == nContigCounter) {
             nContigCounter++;
             continue;
@@ -610,7 +610,7 @@ void CleanupBlockRevFiles()
     }
 }
 
-void ThreadImport(std::vector<boost::filesystem::path> vImportFiles)
+void ThreadImport(std::vector<fs::path> vImportFiles)
 {
     const CChainParams& chainparams = Params();
     RenameThread("bitcoin-loadblk");
@@ -623,7 +623,7 @@ void ThreadImport(std::vector<boost::filesystem::path> vImportFiles)
         int nFile = 0;
         while (true) {
             CDiskBlockPos pos(nFile, 0);
-            if (!boost::filesystem::exists(GetBlockPosFilename(pos, "blk")))
+            if (!fs::exists(GetBlockPosFilename(pos, "blk")))
                 break; // No block files left to reindex
             FILE *file = OpenBlockFile(pos, true);
             if (!file)
@@ -640,11 +640,11 @@ void ThreadImport(std::vector<boost::filesystem::path> vImportFiles)
     }
 
     // hardcoded $DATADIR/bootstrap.dat
-    boost::filesystem::path pathBootstrap = GetDataDir() / "bootstrap.dat";
-    if (boost::filesystem::exists(pathBootstrap)) {
-        FILE *file = fopen(pathBootstrap.string().c_str(), "rb");
+    fs::path pathBootstrap = GetDataDir() / "bootstrap.dat";
+    if (fs::exists(pathBootstrap)) {
+        FILE *file = fsbridge::fopen(pathBootstrap, "rb");
         if (file) {
-            boost::filesystem::path pathBootstrapOld = GetDataDir() / "bootstrap.dat.old";
+            fs::path pathBootstrapOld = GetDataDir() / "bootstrap.dat.old";
             LogPrintf("Importing bootstrap.dat...\n");
             LoadExternalBlockFile(chainparams, file);
             RenameOver(pathBootstrap, pathBootstrapOld);
@@ -654,8 +654,8 @@ void ThreadImport(std::vector<boost::filesystem::path> vImportFiles)
     }
 
     // -loadblock=
-    BOOST_FOREACH(const boost::filesystem::path& path, vImportFiles) {
-        FILE *file = fopen(path.string().c_str(), "rb");
+    BOOST_FOREACH(const fs::path& path, vImportFiles) {
+        FILE *file = fsbridge::fopen(path, "rb");
         if (file) {
             LogPrintf("Importing blocks file %s...\n", path.string());
             LoadExternalBlockFile(chainparams, file);
@@ -1135,8 +1135,8 @@ static bool LockDataDirectory(bool probeOnly)
     std::string strDataDir = GetDataDir().string();
 
     // Make sure only a single Bitcoin process is using the data directory.
-    boost::filesystem::path pathLockFile = GetDataDir() / ".lock";
-    FILE* file = fopen(pathLockFile.string().c_str(), "a"); // empty lock file; created if it doesn't exist.
+    fs::path pathLockFile = GetDataDir() / ".lock";
+    FILE* file = fsbridge::fopen(pathLockFile, "a"); // empty lock file; created if it doesn't exist.
     if (file) fclose(file);
 
     try {
@@ -1400,7 +1400,7 @@ bool AppInitMain(boost::thread_group& threadGroup, CScheduler& scheduler)
     fReindex = GetBoolArg("-reindex", false);
     bool fReindexChainState = GetBoolArg("-reindex-chainstate", false);
 
-    boost::filesystem::create_directories(GetDataDir() / "blocks");
+    fs::create_directories(GetDataDir() / "blocks");
 
     // cache size calculations
     int64_t nTotalCache = (GetArg("-dbcache", nDefaultDbCache) << 20);
@@ -1546,8 +1546,8 @@ bool AppInitMain(boost::thread_group& threadGroup, CScheduler& scheduler)
     }
     LogPrintf(" block index %15dms\n", GetTimeMillis() - nStart);
 
-    boost::filesystem::path est_path = GetDataDir() / FEE_ESTIMATES_FILENAME;
-    CAutoFile est_filein(fopen(est_path.string().c_str(), "rb"), SER_DISK, CLIENT_VERSION);
+    fs::path est_path = GetDataDir() / FEE_ESTIMATES_FILENAME;
+    CAutoFile est_filein(fsbridge::fopen(est_path, "rb"), SER_DISK, CLIENT_VERSION);
     // Allowed to fail as this file IS missing on first startup.
     if (!est_filein.IsNull())
         mempool.ReadFeeEstimates(est_filein);
@@ -1602,7 +1602,7 @@ bool AppInitMain(boost::thread_group& threadGroup, CScheduler& scheduler)
     if (IsArgSet("-blocknotify"))
         uiInterface.NotifyBlockTip.connect(BlockNotifyCallback);
 
-    std::vector<boost::filesystem::path> vImportFiles;
+    std::vector<fs::path> vImportFiles;
     if (mapMultiArgs.count("-loadblock"))
     {
         BOOST_FOREACH(const std::string& strFile, mapMultiArgs.at("-loadblock"))
diff --git a/src/net.h b/src/net.h
index 3bbe386173..0fb0ad5039 100644
--- a/src/net.h
+++ b/src/net.h
@@ -11,6 +11,7 @@
 #include "amount.h"
 #include "bloom.h"
 #include "compat.h"
+#include "fs.h"
 #include "hash.h"
 #include "limitedmap.h"
 #include "netaddress.h"
@@ -32,7 +33,6 @@
 #include <arpa/inet.h>
 #endif
 
-#include <boost/filesystem/path.hpp>
 #include <boost/foreach.hpp>
 #include <boost/signals2/signal.hpp>
 
diff --git a/src/qt/bitcoin.cpp b/src/qt/bitcoin.cpp
index 05a3bd71fd..23ec3ab434 100644
--- a/src/qt/bitcoin.cpp
+++ b/src/qt/bitcoin.cpp
@@ -10,6 +10,7 @@
 
 #include "chainparams.h"
 #include "clientmodel.h"
+#include "fs.h"
 #include "guiconstants.h"
 #include "guiutil.h"
 #include "intro.h"
@@ -38,7 +39,6 @@
 
 #include <stdint.h>
 
-#include <boost/filesystem/operations.hpp>
 #include <boost/thread.hpp>
 
 #include <QApplication>
@@ -608,7 +608,7 @@ int main(int argc, char *argv[])
 
     /// 6. Determine availability of data directory and parse bitcoin.conf
     /// - Do not call GetDataDir(true) before this step finishes
-    if (!boost::filesystem::is_directory(GetDataDir(false)))
+    if (!fs::is_directory(GetDataDir(false)))
     {
         QMessageBox::critical(0, QObject::tr(PACKAGE_NAME),
                               QObject::tr("Error: Specified data directory \"%1\" does not exist.").arg(QString::fromStdString(GetArg("-datadir", ""))));
diff --git a/src/qt/guiutil.cpp b/src/qt/guiutil.cpp
index bb5b2d4347..a2699d374a 100644
--- a/src/qt/guiutil.cpp
+++ b/src/qt/guiutil.cpp
@@ -9,6 +9,7 @@
 #include "qvalidatedlineedit.h"
 #include "walletmodel.h"
 
+#include "fs.h"
 #include "primitives/transaction.h"
 #include "init.h"
 #include "policy/policy.h"
@@ -35,9 +36,6 @@
 #include "shlwapi.h"
 #endif
 
-#include <boost/filesystem.hpp>
-#include <boost/filesystem/fstream.hpp>
-#include <boost/filesystem/detail/utf8_codecvt_facet.hpp>
 #include <boost/scoped_array.hpp>
 
 #include <QAbstractItemView>
@@ -65,7 +63,7 @@
 #include <QFontDatabase>
 #endif
 
-static boost::filesystem::detail::utf8_codecvt_facet utf8;
+static fs::detail::utf8_codecvt_facet utf8;
 
 #if defined(Q_OS_MAC)
 extern double NSAppKitVersionNumber;
@@ -410,10 +408,10 @@ bool isObscured(QWidget *w)
 
 void openDebugLogfile()
 {
-    boost::filesystem::path pathDebug = GetDataDir() / "debug.log";
+    fs::path pathDebug = GetDataDir() / "debug.log";
 
     /* Open debug.log with the associated application */
-    if (boost::filesystem::exists(pathDebug))
+    if (fs::exists(pathDebug))
         QDesktopServices::openUrl(QUrl::fromLocalFile(boostPathToQString(pathDebug)));
 }
 
@@ -597,7 +595,7 @@ TableViewLastColumnResizingFixer::TableViewLastColumnResizingFixer(QTableView* t
 }
 
 #ifdef WIN32
-boost::filesystem::path static StartupShortcutPath()
+fs::path static StartupShortcutPath()
 {
     std::string chain = ChainNameFromCommandLine();
     if (chain == CBaseChainParams::MAIN)
@@ -610,13 +608,13 @@ boost::filesystem::path static StartupShortcutPath()
 bool GetStartOnSystemStartup()
 {
     // check for Bitcoin*.lnk
-    return boost::filesystem::exists(StartupShortcutPath());
+    return fs::exists(StartupShortcutPath());
 }
 
 bool SetStartOnSystemStartup(bool fAutoStart)
 {
     // If the shortcut exists already, remove it for updating
-    boost::filesystem::remove(StartupShortcutPath());
+    fs::remove(StartupShortcutPath());
 
     if (fAutoStart)
     {
@@ -686,10 +684,8 @@ bool SetStartOnSystemStartup(bool fAutoStart)
 // Follow the Desktop Application Autostart Spec:
 // http://standards.freedesktop.org/autostart-spec/autostart-spec-latest.html
 
-boost::filesystem::path static GetAutostartDir()
+fs::path static GetAutostartDir()
 {
-    namespace fs = boost::filesystem;
-
     char* pszConfigHome = getenv("XDG_CONFIG_HOME");
     if (pszConfigHome) return fs::path(pszConfigHome) / "autostart";
     char* pszHome = getenv("HOME");
@@ -697,7 +693,7 @@ boost::filesystem::path static GetAutostartDir()
     return fs::path();
 }
 
-boost::filesystem::path static GetAutostartFilePath()
+fs::path static GetAutostartFilePath()
 {
     std::string chain = ChainNameFromCommandLine();
     if (chain == CBaseChainParams::MAIN)
@@ -707,7 +703,7 @@ boost::filesystem::path static GetAutostartFilePath()
 
 bool GetStartOnSystemStartup()
 {
-    boost::filesystem::ifstream optionFile(GetAutostartFilePath());
+    fs::ifstream optionFile(GetAutostartFilePath());
     if (!optionFile.good())
         return false;
     // Scan through file for "Hidden=true":
@@ -727,7 +723,7 @@ bool GetStartOnSystemStartup()
 bool SetStartOnSystemStartup(bool fAutoStart)
 {
     if (!fAutoStart)
-        boost::filesystem::remove(GetAutostartFilePath());
+        fs::remove(GetAutostartFilePath());
     else
     {
         char pszExePath[MAX_PATH+1];
@@ -735,9 +731,9 @@ bool SetStartOnSystemStartup(bool fAutoStart)
         if (readlink("/proc/self/exe", pszExePath, sizeof(pszExePath)-1) == -1)
             return false;
 
-        boost::filesystem::create_directories(GetAutostartDir());
+        fs::create_directories(GetAutostartDir());
 
-        boost::filesystem::ofstream optionFile(GetAutostartFilePath(), std::ios_base::out|std::ios_base::trunc);
+        fs::ofstream optionFile(GetAutostartFilePath(), std::ios_base::out|std::ios_base::trunc);
         if (!optionFile.good())
             return false;
         std::string chain = ChainNameFromCommandLine();
@@ -859,12 +855,12 @@ void setClipboard(const QString& str)
     QApplication::clipboard()->setText(str, QClipboard::Selection);
 }
 
-boost::filesystem::path qstringToBoostPath(const QString &path)
+fs::path qstringToBoostPath(const QString &path)
 {
-    return boost::filesystem::path(path.toStdString(), utf8);
+    return fs::path(path.toStdString(), utf8);
 }
 
-QString boostPathToQString(const boost::filesystem::path &path)
+QString boostPathToQString(const fs::path &path)
 {
     return QString::fromStdString(path.string(utf8));
 }
diff --git a/src/qt/guiutil.h b/src/qt/guiutil.h
index 913aa5e24b..f956770156 100644
--- a/src/qt/guiutil.h
+++ b/src/qt/guiutil.h
@@ -6,6 +6,7 @@
 #define BITCOIN_QT_GUIUTIL_H
 
 #include "amount.h"
+#include "fs.h"
 
 #include <QEvent>
 #include <QHeaderView>
@@ -16,8 +17,6 @@
 #include <QTableView>
 #include <QLabel>
 
-#include <boost/filesystem.hpp>
-
 class QValidatedLineEdit;
 class SendCoinsRecipient;
 
@@ -183,10 +182,10 @@ namespace GUIUtil
     void restoreWindowGeometry(const QString& strSetting, const QSize &defaultSizeIn, QWidget *parent);
 
     /* Convert QString to OS specific boost path through UTF-8 */
-    boost::filesystem::path qstringToBoostPath(const QString &path);
+    fs::path qstringToBoostPath(const QString &path);
 
     /* Convert OS specific boost path to QString through UTF-8 */
-    QString boostPathToQString(const boost::filesystem::path &path);
+    QString boostPathToQString(const fs::path &path);
 
     /* Convert seconds into a QString with days, hours, mins, secs */
     QString formatDurationStr(int secs);
diff --git a/src/qt/intro.cpp b/src/qt/intro.cpp
index 4939648ff0..2460a59109 100644
--- a/src/qt/intro.cpp
+++ b/src/qt/intro.cpp
@@ -6,6 +6,7 @@
 #include "config/bitcoin-config.h"
 #endif
 
+#include "fs.h"
 #include "intro.h"
 #include "ui_intro.h"
 
@@ -13,8 +14,6 @@
 
 #include "util.h"
 
-#include <boost/filesystem.hpp>
-
 #include <QFileDialog>
 #include <QSettings>
 #include <QMessageBox>
@@ -70,7 +69,6 @@ FreespaceChecker::FreespaceChecker(Intro *_intro)
 
 void FreespaceChecker::check()
 {
-    namespace fs = boost::filesystem;
     QString dataDirStr = intro->getPathToCheck();
     fs::path dataDir = GUIUtil::qstringToBoostPath(dataDirStr);
     uint64_t freeBytesAvailable = 0;
@@ -190,7 +188,6 @@ QString Intro::getDefaultDataDirectory()
 
 bool Intro::pickDataDirectory()
 {
-    namespace fs = boost::filesystem;
     QSettings settings;
     /* If data directory provided on command line, no need to look at settings
        or show a picking dialog */
diff --git a/src/qt/test/rpcnestedtests.cpp b/src/qt/test/rpcnestedtests.cpp
index a7b82117d8..dada689731 100644
--- a/src/qt/test/rpcnestedtests.cpp
+++ b/src/qt/test/rpcnestedtests.cpp
@@ -6,6 +6,7 @@
 
 #include "chainparams.h"
 #include "consensus/validation.h"
+#include "fs.h"
 #include "validation.h"
 #include "rpc/register.h"
 #include "rpc/server.h"
@@ -17,8 +18,6 @@
 #include <QDir>
 #include <QtGlobal>
 
-#include <boost/filesystem.hpp>
-
 static UniValue rpcNestedTest_rpc(const JSONRPCRequest& request)
 {
     if (request.fHelp) {
@@ -156,5 +155,5 @@ void RPCNestedTests::rpcNestedTests()
     delete pblocktree;
     pblocktree = nullptr;
 
-    boost::filesystem::remove_all(boost::filesystem::path(path));
+    fs::remove_all(fs::path(path));
 }
diff --git a/src/rpc/protocol.cpp b/src/rpc/protocol.cpp
index 2be1edb5a6..823a5775f6 100644
--- a/src/rpc/protocol.cpp
+++ b/src/rpc/protocol.cpp
@@ -66,9 +66,9 @@ static const std::string COOKIEAUTH_USER = "__cookie__";
 /** Default name for auth cookie file */
 static const std::string COOKIEAUTH_FILE = ".cookie";
 
-boost::filesystem::path GetAuthCookieFile()
+fs::path GetAuthCookieFile()
 {
-    boost::filesystem::path path(GetArg("-rpccookiefile", COOKIEAUTH_FILE));
+    fs::path path(GetArg("-rpccookiefile", COOKIEAUTH_FILE));
     if (!path.is_complete()) path = GetDataDir() / path;
     return path;
 }
@@ -84,7 +84,7 @@ bool GenerateAuthCookie(std::string *cookie_out)
      * these are set to 077 in init.cpp unless overridden with -sysperms.
      */
     std::ofstream file;
-    boost::filesystem::path filepath = GetAuthCookieFile();
+    fs::path filepath = GetAuthCookieFile();
     file.open(filepath.string().c_str());
     if (!file.is_open()) {
         LogPrintf("Unable to open cookie authentication file %s for writing\n", filepath.string());
@@ -103,7 +103,7 @@ bool GetAuthCookie(std::string *cookie_out)
 {
     std::ifstream file;
     std::string cookie;
-    boost::filesystem::path filepath = GetAuthCookieFile();
+    fs::path filepath = GetAuthCookieFile();
     file.open(filepath.string().c_str());
     if (!file.is_open())
         return false;
@@ -118,8 +118,8 @@ bool GetAuthCookie(std::string *cookie_out)
 void DeleteAuthCookie()
 {
     try {
-        boost::filesystem::remove(GetAuthCookieFile());
-    } catch (const boost::filesystem::filesystem_error& e) {
+        fs::remove(GetAuthCookieFile());
+    } catch (const fs::filesystem_error& e) {
         LogPrintf("%s: Unable to remove random auth cookie file: %s\n", __func__, e.what());
     }
 }
diff --git a/src/rpc/protocol.h b/src/rpc/protocol.h
index 85bc4db101..70f7092cfe 100644
--- a/src/rpc/protocol.h
+++ b/src/rpc/protocol.h
@@ -6,11 +6,12 @@
 #ifndef BITCOIN_RPCPROTOCOL_H
 #define BITCOIN_RPCPROTOCOL_H
 
+#include "fs.h"
+
 #include <list>
 #include <map>
 #include <stdint.h>
 #include <string>
-#include <boost/filesystem.hpp>
 
 #include <univalue.h>
 
@@ -89,7 +90,7 @@ std::string JSONRPCReply(const UniValue& result, const UniValue& error, const Un
 UniValue JSONRPCError(int code, const std::string& message);
 
 /** Get name of RPC authentication cookie file */
-boost::filesystem::path GetAuthCookieFile();
+fs::path GetAuthCookieFile();
 /** Generate a new RPC authentication cookie and write it to disk */
 bool GenerateAuthCookie(std::string *cookie_out);
 /** Read the RPC authentication cookie from disk */
diff --git a/src/rpc/server.cpp b/src/rpc/server.cpp
index 141062b3c0..4032c5163c 100644
--- a/src/rpc/server.cpp
+++ b/src/rpc/server.cpp
@@ -6,6 +6,7 @@
 #include "rpc/server.h"
 
 #include "base58.h"
+#include "fs.h"
 #include "init.h"
 #include "random.h"
 #include "sync.h"
@@ -16,7 +17,6 @@
 #include <univalue.h>
 
 #include <boost/bind.hpp>
-#include <boost/filesystem.hpp>
 #include <boost/foreach.hpp>
 #include <boost/shared_ptr.hpp>
 #include <boost/signals2/signal.hpp>
diff --git a/src/test/dbwrapper_tests.cpp b/src/test/dbwrapper_tests.cpp
index 9d55beb8ea..c9d9849ada 100644
--- a/src/test/dbwrapper_tests.cpp
+++ b/src/test/dbwrapper_tests.cpp
@@ -28,7 +28,7 @@ BOOST_AUTO_TEST_CASE(dbwrapper)
     // Perform tests both obfuscated and non-obfuscated.
     for (int i = 0; i < 2; i++) {
         bool obfuscate = (bool)i;
-        boost::filesystem::path ph = boost::filesystem::temp_directory_path() / boost::filesystem::unique_path();
+        fs::path ph = fs::temp_directory_path() / fs::unique_path();
         CDBWrapper dbw(ph, (1 << 20), true, false, obfuscate);
         char key = 'k';
         uint256 in = GetRandHash();
@@ -49,7 +49,7 @@ BOOST_AUTO_TEST_CASE(dbwrapper_batch)
     // Perform tests both obfuscated and non-obfuscated.
     for (int i = 0; i < 2; i++) {
         bool obfuscate = (bool)i;
-        boost::filesystem::path ph = boost::filesystem::temp_directory_path() / boost::filesystem::unique_path();
+        fs::path ph = fs::temp_directory_path() / fs::unique_path();
         CDBWrapper dbw(ph, (1 << 20), true, false, obfuscate);
 
         char key = 'i';
@@ -86,7 +86,7 @@ BOOST_AUTO_TEST_CASE(dbwrapper_iterator)
     // Perform tests both obfuscated and non-obfuscated.
     for (int i = 0; i < 2; i++) {
         bool obfuscate = (bool)i;
-        boost::filesystem::path ph = boost::filesystem::temp_directory_path() / boost::filesystem::unique_path();
+        fs::path ph = fs::temp_directory_path() / fs::unique_path();
         CDBWrapper dbw(ph, (1 << 20), true, false, obfuscate);
 
         // The two keys are intentionally chosen for ordering
@@ -125,8 +125,8 @@ BOOST_AUTO_TEST_CASE(dbwrapper_iterator)
 // Test that we do not obfuscation if there is existing data.
 BOOST_AUTO_TEST_CASE(existing_data_no_obfuscate)
 {
-    // We're going to share this boost::filesystem::path between two wrappers
-    boost::filesystem::path ph = boost::filesystem::temp_directory_path() / boost::filesystem::unique_path();
+    // We're going to share this fs::path between two wrappers
+    fs::path ph = fs::temp_directory_path() / fs::unique_path();
     create_directories(ph);
 
     // Set up a non-obfuscated wrapper to write some initial data.
@@ -167,8 +167,8 @@ BOOST_AUTO_TEST_CASE(existing_data_no_obfuscate)
 // Ensure that we start obfuscating during a reindex.
 BOOST_AUTO_TEST_CASE(existing_data_reindex)
 {
-    // We're going to share this boost::filesystem::path between two wrappers
-    boost::filesystem::path ph = boost::filesystem::temp_directory_path() / boost::filesystem::unique_path();
+    // We're going to share this fs::path between two wrappers
+    fs::path ph = fs::temp_directory_path() / fs::unique_path();
     create_directories(ph);
 
     // Set up a non-obfuscated wrapper to write some initial data.
@@ -204,7 +204,7 @@ BOOST_AUTO_TEST_CASE(existing_data_reindex)
 
 BOOST_AUTO_TEST_CASE(iterator_ordering)
 {
-    boost::filesystem::path ph = boost::filesystem::temp_directory_path() / boost::filesystem::unique_path();
+    fs::path ph = fs::temp_directory_path() / fs::unique_path();
     CDBWrapper dbw(ph, (1 << 20), true, false, false);
     for (int x=0x00; x<256; ++x) {
         uint8_t key = x;
@@ -275,7 +275,7 @@ BOOST_AUTO_TEST_CASE(iterator_string_ordering)
 {
     char buf[10];
 
-    boost::filesystem::path ph = boost::filesystem::temp_directory_path() / boost::filesystem::unique_path();
+    fs::path ph = fs::temp_directory_path() / fs::unique_path();
     CDBWrapper dbw(ph, (1 << 20), true, false, false);
     for (int x=0x00; x<10; ++x) {
         for (int y = 0; y < 10; y++) {
diff --git a/src/test/test_bitcoin.cpp b/src/test/test_bitcoin.cpp
index abaec45cd7..bda3819662 100644
--- a/src/test/test_bitcoin.cpp
+++ b/src/test/test_bitcoin.cpp
@@ -7,6 +7,7 @@
 #include "chainparams.h"
 #include "consensus/consensus.h"
 #include "consensus/validation.h"
+#include "fs.h"
 #include "key.h"
 #include "validation.h"
 #include "miner.h"
@@ -24,7 +25,6 @@
 
 #include <memory>
 
-#include <boost/filesystem.hpp>
 #include <boost/thread.hpp>
 
 FastRandomContext insecure_rand_ctx(true);
@@ -59,7 +59,7 @@ TestingSetup::TestingSetup(const std::string& chainName) : BasicTestingSetup(cha
         RegisterAllCoreRPCCommands(tableRPC);
         ClearDatadirCache();
         pathTemp = GetTempPath() / strprintf("test_bitcoin_%lu_%i", (unsigned long)GetTime(), (int)(GetRand(100000)));
-        boost::filesystem::create_directories(pathTemp);
+        fs::create_directories(pathTemp);
         ForceSetArg("-datadir", pathTemp.string());
         mempool.setSanityCheck(1.0);
         pblocktree = new CBlockTreeDB(1 << 20, true);
@@ -91,7 +91,7 @@ TestingSetup::~TestingSetup()
         delete pcoinsTip;
         delete pcoinsdbview;
         delete pblocktree;
-        boost::filesystem::remove_all(pathTemp);
+        fs::remove_all(pathTemp);
 }
 
 TestChain100Setup::TestChain100Setup() : TestingSetup(CBaseChainParams::REGTEST)
diff --git a/src/test/test_bitcoin.h b/src/test/test_bitcoin.h
index a593f136eb..60a86d8c48 100644
--- a/src/test/test_bitcoin.h
+++ b/src/test/test_bitcoin.h
@@ -6,12 +6,12 @@
 #define BITCOIN_TEST_TEST_BITCOIN_H
 
 #include "chainparamsbase.h"
+#include "fs.h"
 #include "key.h"
 #include "pubkey.h"
 #include "txdb.h"
 #include "txmempool.h"
 
-#include <boost/filesystem.hpp>
 #include <boost/thread.hpp>
 
 /** Basic testing setup.
@@ -30,7 +30,7 @@ struct BasicTestingSetup {
 class CConnman;
 struct TestingSetup: public BasicTestingSetup {
     CCoinsViewDB *pcoinsdbview;
-    boost::filesystem::path pathTemp;
+    fs::path pathTemp;
     boost::thread_group threadGroup;
     CConnman* connman;
 
diff --git a/src/test/testutil.cpp b/src/test/testutil.cpp
index e6d8622979..591d0bf302 100644
--- a/src/test/testutil.cpp
+++ b/src/test/testutil.cpp
@@ -8,8 +8,8 @@
 #include <shlobj.h>
 #endif
 
-#include <boost/filesystem.hpp>
+#include "fs.h"
 
-boost::filesystem::path GetTempPath() {
-    return boost::filesystem::temp_directory_path();
+fs::path GetTempPath() {
+    return fs::temp_directory_path();
 }
diff --git a/src/test/testutil.h b/src/test/testutil.h
index 5875dc50e6..cbe784d640 100644
--- a/src/test/testutil.h
+++ b/src/test/testutil.h
@@ -8,8 +8,8 @@
 #ifndef BITCOIN_TEST_TESTUTIL_H
 #define BITCOIN_TEST_TESTUTIL_H
 
-#include <boost/filesystem/path.hpp>
+#include "fs.h"
 
-boost::filesystem::path GetTempPath();
+fs::path GetTempPath();
 
 #endif // BITCOIN_TEST_TESTUTIL_H
diff --git a/src/torcontrol.cpp b/src/torcontrol.cpp
index 4c88ebe1d5..c1bd95b00f 100644
--- a/src/torcontrol.cpp
+++ b/src/torcontrol.cpp
@@ -314,9 +314,9 @@ static std::map<std::string,std::string> ParseTorReplyMapping(const std::string
  * @param maxsize Puts a maximum size limit on the file that is read. If the file is larger than this, truncated data
  *         (with len > maxsize) will be returned.
  */
-static std::pair<bool,std::string> ReadBinaryFile(const std::string &filename, size_t maxsize=std::numeric_limits<size_t>::max())
+static std::pair<bool,std::string> ReadBinaryFile(const fs::path &filename, size_t maxsize=std::numeric_limits<size_t>::max())
 {
-    FILE *f = fopen(filename.c_str(), "rb");
+    FILE *f = fsbridge::fopen(filename, "rb");
     if (f == NULL)
         return std::make_pair(false,"");
     std::string retval;
@@ -334,9 +334,9 @@ static std::pair<bool,std::string> ReadBinaryFile(const std::string &filename, s
 /** Write contents of std::string to a file.
  * @return true on success.
  */
-static bool WriteBinaryFile(const std::string &filename, const std::string &data)
+static bool WriteBinaryFile(const fs::path &filename, const std::string &data)
 {
-    FILE *f = fopen(filename.c_str(), "wb");
+    FILE *f = fsbridge::fopen(filename, "wb");
     if (f == NULL)
         return false;
     if (fwrite(data.data(), 1, data.size(), f) != data.size()) {
@@ -359,7 +359,7 @@ public:
     ~TorController();
 
     /** Get name fo file to store private key in */
-    std::string GetPrivateKeyFile();
+    fs::path GetPrivateKeyFile();
 
     /** Reconnect, after getting disconnected */
     void Reconnect();
@@ -411,7 +411,7 @@ TorController::TorController(struct event_base* _base, const std::string& _targe
     // Read service private key if cached
     std::pair<bool,std::string> pkf = ReadBinaryFile(GetPrivateKeyFile());
     if (pkf.first) {
-        LogPrint(BCLog::TOR, "tor: Reading cached private key from %s\n", GetPrivateKeyFile());
+        LogPrint(BCLog::TOR, "tor: Reading cached private key from %s\n", GetPrivateKeyFile().string());
         private_key = pkf.second;
     }
 }
@@ -442,9 +442,9 @@ void TorController::add_onion_cb(TorControlConnection& _conn, const TorControlRe
         service = LookupNumeric(std::string(service_id+".onion").c_str(), GetListenPort());
         LogPrintf("tor: Got service ID %s, advertising service %s\n", service_id, service.ToString());
         if (WriteBinaryFile(GetPrivateKeyFile(), private_key)) {
-            LogPrint(BCLog::TOR, "tor: Cached service private key to %s\n", GetPrivateKeyFile());
+            LogPrint(BCLog::TOR, "tor: Cached service private key to %s\n", GetPrivateKeyFile().string());
         } else {
-            LogPrintf("tor: Error writing service private key to %s\n", GetPrivateKeyFile());
+            LogPrintf("tor: Error writing service private key to %s\n", GetPrivateKeyFile().string());
         }
         AddLocal(service, LOCAL_MANUAL);
         // ... onion requested - keep connection open
@@ -651,9 +651,9 @@ void TorController::Reconnect()
     }
 }
 
-std::string TorController::GetPrivateKeyFile()
+fs::path TorController::GetPrivateKeyFile()
 {
-    return (GetDataDir() / "onion_private_key").string();
+    return GetDataDir() / "onion_private_key";
 }
 
 void TorController::reconnect_cb(evutil_socket_t fd, short what, void *arg)
diff --git a/src/util.cpp b/src/util.cpp
index db45ad1626..5473799289 100644
--- a/src/util.cpp
+++ b/src/util.cpp
@@ -10,6 +10,7 @@
 #include "util.h"
 
 #include "chainparamsbase.h"
+#include "fs.h"
 #include "random.h"
 #include "serialize.h"
 #include "sync.h"
@@ -79,8 +80,6 @@
 #include <boost/algorithm/string/case_conv.hpp> // for to_lower()
 #include <boost/algorithm/string/join.hpp>
 #include <boost/algorithm/string/predicate.hpp> // for startswith() and endswith()
-#include <boost/filesystem.hpp>
-#include <boost/filesystem/fstream.hpp>
 #include <boost/foreach.hpp>
 #include <boost/program_options/detail/config_file.hpp>
 #include <boost/program_options/parsers.hpp>
@@ -215,8 +214,8 @@ void OpenDebugLog()
 
     assert(fileout == NULL);
     assert(vMsgsBeforeOpenLog);
-    boost::filesystem::path pathDebug = GetDataDir() / "debug.log";
-    fileout = fopen(pathDebug.string().c_str(), "a");
+    fs::path pathDebug = GetDataDir() / "debug.log";
+    fileout = fsbridge::fopen(pathDebug, "a");
     if (fileout) {
         setbuf(fileout, NULL); // unbuffered
         // dump buffered messages from before we opened the log
@@ -354,8 +353,8 @@ int LogPrintStr(const std::string &str)
             // reopen the log file, if requested
             if (fReopenDebugLog) {
                 fReopenDebugLog = false;
-                boost::filesystem::path pathDebug = GetDataDir() / "debug.log";
-                if (freopen(pathDebug.string().c_str(),"a",fileout) != NULL)
+                fs::path pathDebug = GetDataDir() / "debug.log";
+                if (fsbridge::freopen(pathDebug,"a",fileout) != NULL)
                     setbuf(fileout, NULL); // unbuffered
             }
 
@@ -512,9 +511,8 @@ void PrintExceptionContinue(const std::exception* pex, const char* pszThread)
     fprintf(stderr, "\n\n************************\n%s\n", message.c_str());
 }
 
-boost::filesystem::path GetDefaultDataDir()
+fs::path GetDefaultDataDir()
 {
-    namespace fs = boost::filesystem;
     // Windows < Vista: C:\Documents and Settings\Username\Application Data\Bitcoin
     // Windows >= Vista: C:\Users\Username\AppData\Roaming\Bitcoin
     // Mac: ~/Library/Application Support/Bitcoin
@@ -539,13 +537,12 @@ boost::filesystem::path GetDefaultDataDir()
 #endif
 }
 
-static boost::filesystem::path pathCached;
-static boost::filesystem::path pathCachedNetSpecific;
+static fs::path pathCached;
+static fs::path pathCachedNetSpecific;
 static CCriticalSection csPathCached;
 
-const boost::filesystem::path &GetDataDir(bool fNetSpecific)
+const fs::path &GetDataDir(bool fNetSpecific)
 {
-    namespace fs = boost::filesystem;
 
     LOCK(csPathCached);
 
@@ -577,13 +574,13 @@ void ClearDatadirCache()
 {
     LOCK(csPathCached);
 
-    pathCached = boost::filesystem::path();
-    pathCachedNetSpecific = boost::filesystem::path();
+    pathCached = fs::path();
+    pathCachedNetSpecific = fs::path();
 }
 
-boost::filesystem::path GetConfigFile(const std::string& confPath)
+fs::path GetConfigFile(const std::string& confPath)
 {
-    boost::filesystem::path pathConfigFile(confPath);
+    fs::path pathConfigFile(confPath);
     if (!pathConfigFile.is_complete())
         pathConfigFile = GetDataDir(false) / pathConfigFile;
 
@@ -592,7 +589,7 @@ boost::filesystem::path GetConfigFile(const std::string& confPath)
 
 void ReadConfigFile(const std::string& confPath)
 {
-    boost::filesystem::ifstream streamConfig(GetConfigFile(confPath));
+    fs::ifstream streamConfig(GetConfigFile(confPath));
     if (!streamConfig.good())
         return; // No bitcoin.conf file is OK
 
@@ -617,16 +614,16 @@ void ReadConfigFile(const std::string& confPath)
 }
 
 #ifndef WIN32
-boost::filesystem::path GetPidFile()
+fs::path GetPidFile()
 {
-    boost::filesystem::path pathPidFile(GetArg("-pid", BITCOIN_PID_FILENAME));
+    fs::path pathPidFile(GetArg("-pid", BITCOIN_PID_FILENAME));
     if (!pathPidFile.is_complete()) pathPidFile = GetDataDir() / pathPidFile;
     return pathPidFile;
 }
 
-void CreatePidFile(const boost::filesystem::path &path, pid_t pid)
+void CreatePidFile(const fs::path &path, pid_t pid)
 {
-    FILE* file = fopen(path.string().c_str(), "w");
+    FILE* file = fsbridge::fopen(path, "w");
     if (file)
     {
         fprintf(file, "%d\n", pid);
@@ -635,7 +632,7 @@ void CreatePidFile(const boost::filesystem::path &path, pid_t pid)
 }
 #endif
 
-bool RenameOver(boost::filesystem::path src, boost::filesystem::path dest)
+bool RenameOver(fs::path src, fs::path dest)
 {
 #ifdef WIN32
     return MoveFileExA(src.string().c_str(), dest.string().c_str(),
@@ -651,13 +648,13 @@ bool RenameOver(boost::filesystem::path src, boost::filesystem::path dest)
  * Specifically handles case where path p exists, but it wasn't possible for the user to
  * write to the parent directory.
  */
-bool TryCreateDirectory(const boost::filesystem::path& p)
+bool TryCreateDirectory(const fs::path& p)
 {
     try
     {
-        return boost::filesystem::create_directory(p);
-    } catch (const boost::filesystem::filesystem_error&) {
-        if (!boost::filesystem::exists(p) || !boost::filesystem::is_directory(p))
+        return fs::create_directory(p);
+    } catch (const fs::filesystem_error&) {
+        if (!fs::exists(p) || !fs::is_directory(p))
             throw;
     }
 
@@ -764,11 +761,11 @@ void ShrinkDebugFile()
     // Amount of debug.log to save at end when shrinking (must fit in memory)
     constexpr size_t RECENT_DEBUG_HISTORY_SIZE = 10 * 1000000;
     // Scroll debug.log if it's getting too big
-    boost::filesystem::path pathLog = GetDataDir() / "debug.log";
-    FILE* file = fopen(pathLog.string().c_str(), "r");
+    fs::path pathLog = GetDataDir() / "debug.log";
+    FILE* file = fsbridge::fopen(pathLog, "r");
     // If debug.log file is more than 10% bigger the RECENT_DEBUG_HISTORY_SIZE
     // trim it down by saving only the last RECENT_DEBUG_HISTORY_SIZE bytes
-    if (file && boost::filesystem::file_size(pathLog) > 11 * (RECENT_DEBUG_HISTORY_SIZE / 10))
+    if (file && fs::file_size(pathLog) > 11 * (RECENT_DEBUG_HISTORY_SIZE / 10))
     {
         // Restart the file with some of the end
         std::vector<char> vch(RECENT_DEBUG_HISTORY_SIZE, 0);
@@ -776,7 +773,7 @@ void ShrinkDebugFile()
         int nBytes = fread(vch.data(), 1, vch.size(), file);
         fclose(file);
 
-        file = fopen(pathLog.string().c_str(), "w");
+        file = fsbridge::fopen(pathLog, "w");
         if (file)
         {
             fwrite(vch.data(), 1, nBytes, file);
@@ -788,10 +785,8 @@ void ShrinkDebugFile()
 }
 
 #ifdef WIN32
-boost::filesystem::path GetSpecialFolderPath(int nFolder, bool fCreate)
+fs::path GetSpecialFolderPath(int nFolder, bool fCreate)
 {
-    namespace fs = boost::filesystem;
-
     char pszPath[MAX_PATH] = "";
 
     if(SHGetSpecialFolderPathA(NULL, pszPath, nFolder, fCreate))
@@ -851,9 +846,9 @@ void SetupEnvironment()
     // The path locale is lazy initialized and to avoid deinitialization errors
     // in multithreading environments, it is set explicitly by the main thread.
     // A dummy locale is used to extract the internal default locale, used by
-    // boost::filesystem::path, which is then used to explicitly imbue the path.
-    std::locale loc = boost::filesystem::path::imbue(std::locale::classic());
-    boost::filesystem::path::imbue(loc);
+    // fs::path, which is then used to explicitly imbue the path.
+    std::locale loc = fs::path::imbue(std::locale::classic());
+    fs::path::imbue(loc);
 }
 
 bool SetupNetworking()
diff --git a/src/util.h b/src/util.h
index 09481bc01c..7998449fee 100644
--- a/src/util.h
+++ b/src/util.h
@@ -15,6 +15,7 @@
 #endif
 
 #include "compat.h"
+#include "fs.h"
 #include "tinyformat.h"
 #include "utiltime.h"
 
@@ -25,7 +26,6 @@
 #include <string>
 #include <vector>
 
-#include <boost/filesystem/path.hpp>
 #include <boost/signals2/signal.hpp>
 #include <boost/thread/exceptions.hpp>
 
@@ -144,19 +144,19 @@ void FileCommit(FILE *file);
 bool TruncateFile(FILE *file, unsigned int length);
 int RaiseFileDescriptorLimit(int nMinFD);
 void AllocateFileRange(FILE *file, unsigned int offset, unsigned int length);
-bool RenameOver(boost::filesystem::path src, boost::filesystem::path dest);
-bool TryCreateDirectory(const boost::filesystem::path& p);
-boost::filesystem::path GetDefaultDataDir();
-const boost::filesystem::path &GetDataDir(bool fNetSpecific = true);
+bool RenameOver(fs::path src, fs::path dest);
+bool TryCreateDirectory(const fs::path& p);
+fs::path GetDefaultDataDir();
+const fs::path &GetDataDir(bool fNetSpecific = true);
 void ClearDatadirCache();
-boost::filesystem::path GetConfigFile(const std::string& confPath);
+fs::path GetConfigFile(const std::string& confPath);
 #ifndef WIN32
-boost::filesystem::path GetPidFile();
-void CreatePidFile(const boost::filesystem::path &path, pid_t pid);
+fs::path GetPidFile();
+void CreatePidFile(const fs::path &path, pid_t pid);
 #endif
 void ReadConfigFile(const std::string& confPath);
 #ifdef WIN32
-boost::filesystem::path GetSpecialFolderPath(int nFolder, bool fCreate = true);
+fs::path GetSpecialFolderPath(int nFolder, bool fCreate = true);
 #endif
 void OpenDebugLog();
 void ShrinkDebugFile();
diff --git a/src/validation.cpp b/src/validation.cpp
index 1f5b317441..239893dc0b 100644
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -12,6 +12,7 @@
 #include "consensus/consensus.h"
 #include "consensus/merkle.h"
 #include "consensus/validation.h"
+#include "fs.h"
 #include "hash.h"
 #include "init.h"
 #include "policy/fees.h"
@@ -41,8 +42,6 @@
 
 #include <boost/algorithm/string/replace.hpp>
 #include <boost/algorithm/string/join.hpp>
-#include <boost/filesystem.hpp>
-#include <boost/filesystem/fstream.hpp>
 #include <boost/math/distributions/poisson.hpp>
 #include <boost/thread.hpp>
 
@@ -3318,8 +3317,8 @@ void UnlinkPrunedFiles(const std::set<int>& setFilesToPrune)
 {
     for (std::set<int>::iterator it = setFilesToPrune.begin(); it != setFilesToPrune.end(); ++it) {
         CDiskBlockPos pos(*it, 0);
-        boost::filesystem::remove(GetBlockPosFilename(pos, "blk"));
-        boost::filesystem::remove(GetBlockPosFilename(pos, "rev"));
+        fs::remove(GetBlockPosFilename(pos, "blk"));
+        fs::remove(GetBlockPosFilename(pos, "rev"));
         LogPrintf("Prune: %s deleted blk/rev (%05u)\n", __func__, *it);
     }
 }
@@ -3403,7 +3402,7 @@ void FindFilesToPrune(std::set<int>& setFilesToPrune, uint64_t nPruneAfterHeight
 
 bool CheckDiskSpace(uint64_t nAdditionalBytes)
 {
-    uint64_t nFreeBytesAvailable = boost::filesystem::space(GetDataDir()).available;
+    uint64_t nFreeBytesAvailable = fs::space(GetDataDir()).available;
 
     // Check for nMinDiskSpace bytes (currently 50MB)
     if (nFreeBytesAvailable < nMinDiskSpace + nAdditionalBytes)
@@ -3416,11 +3415,11 @@ FILE* OpenDiskFile(const CDiskBlockPos &pos, const char *prefix, bool fReadOnly)
 {
     if (pos.IsNull())
         return NULL;
-    boost::filesystem::path path = GetBlockPosFilename(pos, prefix);
-    boost::filesystem::create_directories(path.parent_path());
-    FILE* file = fopen(path.string().c_str(), "rb+");
+    fs::path path = GetBlockPosFilename(pos, prefix);
+    fs::create_directories(path.parent_path());
+    FILE* file = fsbridge::fopen(path, "rb+");
     if (!file && !fReadOnly)
-        file = fopen(path.string().c_str(), "wb+");
+        file = fsbridge::fopen(path, "wb+");
     if (!file) {
         LogPrintf("Unable to open file %s\n", path.string());
         return NULL;
@@ -3443,7 +3442,7 @@ FILE* OpenUndoFile(const CDiskBlockPos &pos, bool fReadOnly) {
     return OpenDiskFile(pos, "rev", fReadOnly);
 }
 
-boost::filesystem::path GetBlockPosFilename(const CDiskBlockPos &pos, const char *prefix)
+fs::path GetBlockPosFilename(const CDiskBlockPos &pos, const char *prefix)
 {
     return GetDataDir() / "blocks" / strprintf("%s%05u.dat", prefix, pos.nFile);
 }
@@ -4168,7 +4167,7 @@ static const uint64_t MEMPOOL_DUMP_VERSION = 1;
 bool LoadMempool(void)
 {
     int64_t nExpiryTimeout = GetArg("-mempoolexpiry", DEFAULT_MEMPOOL_EXPIRY) * 60 * 60;
-    FILE* filestr = fopen((GetDataDir() / "mempool.dat").string().c_str(), "rb");
+    FILE* filestr = fsbridge::fopen(GetDataDir() / "mempool.dat", "rb");
     CAutoFile file(filestr, SER_DISK, CLIENT_VERSION);
     if (file.IsNull()) {
         LogPrintf("Failed to open mempool file from disk. Continuing anyway.\n");
@@ -4248,7 +4247,7 @@ void DumpMempool(void)
     int64_t mid = GetTimeMicros();
 
     try {
-        FILE* filestr = fopen((GetDataDir() / "mempool.dat.new").string().c_str(), "wb");
+        FILE* filestr = fsbridge::fopen(GetDataDir() / "mempool.dat.new", "wb");
         if (!filestr) {
             return;
         }
diff --git a/src/validation.h b/src/validation.h
index 5f8e9a689c..4aa10cbb0b 100644
--- a/src/validation.h
+++ b/src/validation.h
@@ -13,6 +13,7 @@
 #include "amount.h"
 #include "chain.h"
 #include "coins.h"
+#include "fs.h"
 #include "protocol.h" // For CMessageHeader::MessageStartChars
 #include "script/script_error.h"
 #include "sync.h"
@@ -30,7 +31,6 @@
 #include <atomic>
 
 #include <boost/unordered_map.hpp>
-#include <boost/filesystem/path.hpp>
 
 class CBlockIndex;
 class CBlockTreeDB;
@@ -250,7 +250,7 @@ FILE* OpenBlockFile(const CDiskBlockPos &pos, bool fReadOnly = false);
 /** Open an undo file (rev?????.dat) */
 FILE* OpenUndoFile(const CDiskBlockPos &pos, bool fReadOnly = false);
 /** Translation to a filesystem path */
-boost::filesystem::path GetBlockPosFilename(const CDiskBlockPos &pos, const char *prefix);
+fs::path GetBlockPosFilename(const CDiskBlockPos &pos, const char *prefix);
 /** Import blocks from an external file */
 bool LoadExternalBlockFile(const CChainParams& chainparams, FILE* fileIn, CDiskBlockPos *dbp = NULL);
 /** Initialize a new block tree database + block data on disk */
diff --git a/src/wallet/db.cpp b/src/wallet/db.cpp
index d3333bf1ab..f47fc92b57 100644
--- a/src/wallet/db.cpp
+++ b/src/wallet/db.cpp
@@ -6,6 +6,7 @@
 #include "db.h"
 
 #include "addrman.h"
+#include "fs.h"
 #include "hash.h"
 #include "protocol.h"
 #include "util.h"
@@ -17,7 +18,6 @@
 #include <sys/stat.h>
 #endif
 
-#include <boost/filesystem.hpp>
 #include <boost/foreach.hpp>
 #include <boost/thread.hpp>
 #include <boost/version.hpp>
@@ -66,7 +66,7 @@ void CDBEnv::Close()
     EnvShutdown();
 }
 
-bool CDBEnv::Open(const boost::filesystem::path& pathIn)
+bool CDBEnv::Open(const fs::path& pathIn)
 {
     if (fDbEnvInit)
         return true;
@@ -74,9 +74,9 @@ bool CDBEnv::Open(const boost::filesystem::path& pathIn)
     boost::this_thread::interruption_point();
 
     strPath = pathIn.string();
-    boost::filesystem::path pathLogDir = pathIn / "database";
+    fs::path pathLogDir = pathIn / "database";
     TryCreateDirectory(pathLogDir);
-    boost::filesystem::path pathErrorFile = pathIn / "db.log";
+    fs::path pathErrorFile = pathIn / "db.log";
     LogPrintf("CDBEnv::Open: LogDir=%s ErrorFile=%s\n", pathLogDir.string(), pathErrorFile.string());
 
     unsigned int nEnvFlags = 0;
@@ -89,7 +89,7 @@ bool CDBEnv::Open(const boost::filesystem::path& pathIn)
     dbenv->set_lg_max(1048576);
     dbenv->set_lk_max_locks(40000);
     dbenv->set_lk_max_objects(40000);
-    dbenv->set_errfile(fopen(pathErrorFile.string().c_str(), "a")); /// debug
+    dbenv->set_errfile(fsbridge::fopen(pathErrorFile, "a")); /// debug
     dbenv->set_flags(DB_AUTO_COMMIT, 1);
     dbenv->set_flags(DB_TXN_WRITE_NOSYNC, 1);
     dbenv->log_set_config(DB_LOG_AUTO_REMOVE, 1);
@@ -227,13 +227,13 @@ bool CDB::Recover(const std::string& filename, void *callbackDataIn, bool (*reco
     return fSuccess;
 }
 
-bool CDB::VerifyEnvironment(const std::string& walletFile, const boost::filesystem::path& dataDir, std::string& errorStr)
+bool CDB::VerifyEnvironment(const std::string& walletFile, const fs::path& dataDir, std::string& errorStr)
 {
     LogPrintf("Using BerkeleyDB version %s\n", DbEnv::version(0, 0, 0));
     LogPrintf("Using wallet %s\n", walletFile);
 
     // Wallet file must be a plain filename without a directory
-    if (walletFile != boost::filesystem::basename(walletFile) + boost::filesystem::extension(walletFile))
+    if (walletFile != fs::basename(walletFile) + fs::extension(walletFile))
     {
         errorStr = strprintf(_("Wallet %s resides outside data directory %s"), walletFile, dataDir.string());
         return false;
@@ -242,12 +242,12 @@ bool CDB::VerifyEnvironment(const std::string& walletFile, const boost::filesyst
     if (!bitdb.Open(dataDir))
     {
         // try moving the database env out of the way
-        boost::filesystem::path pathDatabase = dataDir / "database";
-        boost::filesystem::path pathDatabaseBak = dataDir / strprintf("database.%d.bak", GetTime());
+        fs::path pathDatabase = dataDir / "database";
+        fs::path pathDatabaseBak = dataDir / strprintf("database.%d.bak", GetTime());
         try {
-            boost::filesystem::rename(pathDatabase, pathDatabaseBak);
+            fs::rename(pathDatabase, pathDatabaseBak);
             LogPrintf("Moved old %s to %s. Retrying.\n", pathDatabase.string(), pathDatabaseBak.string());
-        } catch (const boost::filesystem::filesystem_error&) {
+        } catch (const fs::filesystem_error&) {
             // failure is ok (well, not really, but it's not worse than what we started with)
         }
 
@@ -261,9 +261,9 @@ bool CDB::VerifyEnvironment(const std::string& walletFile, const boost::filesyst
     return true;
 }
 
-bool CDB::VerifyDatabaseFile(const std::string& walletFile, const boost::filesystem::path& dataDir, std::string& warningStr, std::string& errorStr, bool (*recoverFunc)(const std::string& strFile))
+bool CDB::VerifyDatabaseFile(const std::string& walletFile, const fs::path& dataDir, std::string& warningStr, std::string& errorStr, bool (*recoverFunc)(const std::string& strFile))
 {
-    if (boost::filesystem::exists(dataDir / walletFile))
+    if (fs::exists(dataDir / walletFile))
     {
         CDBEnv::VerifyResult r = bitdb.Verify(walletFile, recoverFunc);
         if (r == CDBEnv::RECOVER_OK)
@@ -590,7 +590,7 @@ void CDBEnv::Flush(bool fShutdown)
                 dbenv->log_archive(&listp, DB_ARCH_REMOVE);
                 Close();
                 if (!fMockDb)
-                    boost::filesystem::remove_all(boost::filesystem::path(strPath) / "database");
+                    fs::remove_all(fs::path(strPath) / "database");
             }
         }
     }
diff --git a/src/wallet/db.h b/src/wallet/db.h
index 19c54e314c..9f912f9a1a 100644
--- a/src/wallet/db.h
+++ b/src/wallet/db.h
@@ -7,6 +7,7 @@
 #define BITCOIN_WALLET_DB_H
 
 #include "clientversion.h"
+#include "fs.h"
 #include "serialize.h"
 #include "streams.h"
 #include "sync.h"
@@ -16,8 +17,6 @@
 #include <string>
 #include <vector>
 
-#include <boost/filesystem/path.hpp>
-
 #include <db_cxx.h>
 
 static const unsigned int DEFAULT_WALLET_DBLOGSIZE = 100;
@@ -28,7 +27,7 @@ class CDBEnv
 private:
     bool fDbEnvInit;
     bool fMockDb;
-    // Don't change into boost::filesystem::path, as that can result in
+    // Don't change into fs::path, as that can result in
     // shutdown problems/crashes caused by a static initialized internal pointer.
     std::string strPath;
 
@@ -67,7 +66,7 @@ public:
     typedef std::pair<std::vector<unsigned char>, std::vector<unsigned char> > KeyValPair;
     bool Salvage(const std::string& strFile, bool fAggressive, std::vector<KeyValPair>& vResult);
 
-    bool Open(const boost::filesystem::path& path);
+    bool Open(const fs::path& path);
     void Close();
     void Flush(bool fShutdown);
     void CheckpointLSN(const std::string& strFile);
@@ -110,9 +109,9 @@ public:
        ideal to be called periodically */
     static bool PeriodicFlush(std::string strFile);
     /* verifies the database environment */
-    static bool VerifyEnvironment(const std::string& walletFile, const boost::filesystem::path& dataDir, std::string& errorStr);
+    static bool VerifyEnvironment(const std::string& walletFile, const fs::path& dataDir, std::string& errorStr);
     /* verifies the database file */
-    static bool VerifyDatabaseFile(const std::string& walletFile, const boost::filesystem::path& dataDir, std::string& warningStr, std::string& errorStr, bool (*recoverFunc)(const std::string& strFile));
+    static bool VerifyDatabaseFile(const std::string& walletFile, const fs::path& dataDir, std::string& warningStr, std::string& errorStr, bool (*recoverFunc)(const std::string& strFile));
 
 private:
     CDB(const CDB&);
diff --git a/src/wallet/wallet.cpp b/src/wallet/wallet.cpp
index 68d4bc35ee..55d81daab4 100644
--- a/src/wallet/wallet.cpp
+++ b/src/wallet/wallet.cpp
@@ -11,6 +11,7 @@
 #include "wallet/coincontrol.h"
 #include "consensus/consensus.h"
 #include "consensus/validation.h"
+#include "fs.h"
 #include "key.h"
 #include "keystore.h"
 #include "validation.h"
@@ -30,7 +31,6 @@
 #include <assert.h>
 
 #include <boost/algorithm/string/replace.hpp>
-#include <boost/filesystem.hpp>
 #include <boost/thread.hpp>
 
 CWallet* pwalletMain = NULL;
@@ -3945,16 +3945,16 @@ bool CWallet::BackupWallet(const std::string& strDest)
                 bitdb.mapFileUseCount.erase(strWalletFile);
 
                 // Copy wallet file
-                boost::filesystem::path pathSrc = GetDataDir() / strWalletFile;
-                boost::filesystem::path pathDest(strDest);
-                if (boost::filesystem::is_directory(pathDest))
+                fs::path pathSrc = GetDataDir() / strWalletFile;
+                fs::path pathDest(strDest);
+                if (fs::is_directory(pathDest))
                     pathDest /= strWalletFile;
 
                 try {
-                    boost::filesystem::copy_file(pathSrc, pathDest, boost::filesystem::copy_option::overwrite_if_exists);
+                    fs::copy_file(pathSrc, pathDest, fs::copy_option::overwrite_if_exists);
                     LogPrintf("copied %s to %s\n", strWalletFile, pathDest.string());
                     return true;
-                } catch (const boost::filesystem::filesystem_error& e) {
+                } catch (const fs::filesystem_error& e) {
                     LogPrintf("error copying %s to %s - %s\n", strWalletFile, pathDest.string(), e.what());
                     return false;
                 }
diff --git a/src/wallet/walletdb.cpp b/src/wallet/walletdb.cpp
index 73d79eb452..ceff2d36e3 100644
--- a/src/wallet/walletdb.cpp
+++ b/src/wallet/walletdb.cpp
@@ -7,6 +7,7 @@
 
 #include "base58.h"
 #include "consensus/validation.h"
+#include "fs.h"
 #include "validation.h" // For CheckTransaction
 #include "protocol.h"
 #include "serialize.h"
@@ -18,7 +19,6 @@
 #include <atomic>
 
 #include <boost/version.hpp>
-#include <boost/filesystem.hpp>
 #include <boost/foreach.hpp>
 #include <boost/thread.hpp>
 
@@ -842,12 +842,12 @@ bool CWalletDB::RecoverKeysOnlyFilter(void *callbackData, CDataStream ssKey, CDa
     return true;
 }
 
-bool CWalletDB::VerifyEnvironment(const std::string& walletFile, const boost::filesystem::path& dataDir, std::string& errorStr)
+bool CWalletDB::VerifyEnvironment(const std::string& walletFile, const fs::path& dataDir, std::string& errorStr)
 {
     return CDB::VerifyEnvironment(walletFile, dataDir, errorStr);
 }
 
-bool CWalletDB::VerifyDatabaseFile(const std::string& walletFile, const boost::filesystem::path& dataDir, std::string& warningStr, std::string& errorStr)
+bool CWalletDB::VerifyDatabaseFile(const std::string& walletFile, const fs::path& dataDir, std::string& warningStr, std::string& errorStr)
 {
     return CDB::VerifyDatabaseFile(walletFile, dataDir, errorStr, warningStr, CWalletDB::Recover);
 }
diff --git a/src/wallet/walletdb.h b/src/wallet/walletdb.h
index 271c1d66c9..b94f341b2e 100644
--- a/src/wallet/walletdb.h
+++ b/src/wallet/walletdb.h
@@ -185,9 +185,9 @@ public:
     /* Function to determine if a certain KV/key-type is a key (cryptographical key) type */
     static bool IsKeyType(const std::string& strType);
     /* verifies the database environment */
-    static bool VerifyEnvironment(const std::string& walletFile, const boost::filesystem::path& dataDir, std::string& errorStr);
+    static bool VerifyEnvironment(const std::string& walletFile, const fs::path& dataDir, std::string& errorStr);
     /* verifies the database file */
-    static bool VerifyDatabaseFile(const std::string& walletFile, const boost::filesystem::path& dataDir, std::string& warningStr, std::string& errorStr);
+    static bool VerifyDatabaseFile(const std::string& walletFile, const fs::path& dataDir, std::string& warningStr, std::string& errorStr);
 
     //! write the hdchain model (external chain child index counter)
     bool WriteHDChain(const CHDChain& chain);