Use cursored writes instead

CMakeLists.txt

@@ -145,6 +145,11 @@ if(WITH_USDT)
   find_package(USDT MODULE REQUIRED)
 endif()
 
+option(WITH_MDBX "Enable libmdbx for the coindsb." ON)
+if(WITH_MDBX)
+  find_package(MDBX MODULE REQUIRED)
+endif()
+
 cmake_dependent_option(ENABLE_EXTERNAL_SIGNER "Enable external signer support." ON "NOT WIN32" OFF)
 
 cmake_dependent_option(WITH_QRENCODE "Enable QR code support." ON "BUILD_GUI" OFF)
@@ -234,6 +239,7 @@ if(BUILD_FOR_FUZZING)
   set(BUILD_WALLET_TOOL OFF)
   set(BUILD_GUI OFF)
   set(ENABLE_EXTERNAL_SIGNER OFF)
+  set(WITH_MDBX OFF)
   set(WITH_MINIUPNPC OFF)
   set(WITH_ZMQ OFF)
   set(BUILD_TESTS OFF)
@@ -620,6 +626,7 @@ message("  ZeroMQ .............................. ${WITH_ZMQ}")
 message("  USDT tracing ........................ ${WITH_USDT}")
 message("  QR code (GUI) ....................... ${WITH_QRENCODE}")
 message("  DBus (GUI, Linux only) .............. ${WITH_DBUS}")
+message("  libmdbx coinsdb        .............. ${WITH_MDBX}")
 message("Tests:")
 message("  test_bitcoin ........................ ${BUILD_TESTS}")
 message("  test_bitcoin-qt ..................... ${BUILD_GUI_TESTS}")

cmake/module/FindMDBX.cmake

@@ -0,0 +1,29 @@
+# Copyright (c) 2024-present The Bitcoin Core developers
+# Distributed under the MIT software license, see the accompanying
+# file COPYING or https://opensource.org/license/mit/.
+
+find_path(MDBX_INCLUDE_DIR
+  NAMES mdbx.h++
+)
+
+find_library(MDBX_LIBRARY
+  NAMES mdbx
+)
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(MDBX
+  REQUIRED_VARS MDBX_LIBRARY MDBX_INCLUDE_DIR
+)
+
+if(MDBX_FOUND AND NOT TARGET MDBX::MDBX)
+  add_library(MDBX::MDBX STATIC IMPORTED)
+  set_target_properties(MDBX::MDBX PROPERTIES
+    IMPORTED_LOCATION "${MDBX_LIBRARY}"
+    INTERFACE_INCLUDE_DIRECTORIES "${MDBX_INCLUDE_DIR}"
+  )
+endif()
+
+mark_as_advanced(
+  MDBX_INCLUDE_DIR
+  MDBX_LIBRARY
+)

depends/Makefile

@@ -42,6 +42,7 @@ NO_WALLET ?=
 NO_ZMQ ?=
 NO_UPNP ?=
 NO_USDT ?=
+NO_MDBX ?=
 MULTIPROCESS ?=
 LTO ?=
 NO_HARDEN ?=
@@ -159,11 +160,13 @@ wallet_packages_$(NO_WALLET) = $(bdb_packages_) $(sqlite_packages_)
 
 upnp_packages_$(NO_UPNP) = $(upnp_packages)
 
+libmdbx_packages_$(NO_MDBX) = $(libmdbx_packages)
+
 zmq_packages_$(NO_ZMQ) = $(zmq_packages)
 multiprocess_packages_$(MULTIPROCESS) = $(multiprocess_packages)
 usdt_packages_$(NO_USDT) = $(usdt_$(host_os)_packages)
 
-packages += $($(host_arch)_$(host_os)_packages) $($(host_os)_packages) $(boost_packages_) $(libevent_packages_) $(qt_packages_) $(wallet_packages_) $(upnp_packages_) $(usdt_packages_)
+packages += $($(host_arch)_$(host_os)_packages) $($(host_os)_packages) $(boost_packages_) $(libevent_packages_) $(qt_packages_) $(wallet_packages_) $(upnp_packages_) $(libmdbx_packages_) $(usdt_packages_)
 native_packages += $($(host_arch)_$(host_os)_native_packages) $($(host_os)_native_packages)
 
 ifneq ($(zmq_packages_),)
@@ -231,6 +234,7 @@ $(host_prefix)/toolchain.cmake : toolchain.cmake.in $(host_prefix)/.stamp_$(fina
             -e 's|@bdb_packages@|$(bdb_packages_)|' \
             -e 's|@sqlite_packages@|$(sqlite_packages_)|' \
             -e 's|@upnp_packages@|$(upnp_packages_)|' \
+            -e 's|@libmdbx_packages@|$(libmdbx_packages_)|' \
             -e 's|@usdt_packages@|$(usdt_packages_)|' \
             -e 's|@no_harden@|$(NO_HARDEN)|' \
             -e 's|@multiprocess@|$(MULTIPROCESS)|' \

depends/packages/libmdbx.mk

@@ -0,0 +1,24 @@
+package=libmdbx
+$(package)_version=0.13.1
+$(package)_download_path=https://libmdbx.dqdkfa.ru/release
+$(package)_file_name=libmdbx-amalgamated-0.13.1.tar.xz
+$(package)_sha256_hash=aabb6bf34b8699b06de717a8facf8820a2fdd1bbe4ae0e90c9a2bbdb3880181d
+
+define $(package)_extract_cmds
+    mkdir -p $($(package)_extract_dir) && \
+    echo "$($(package)_sha256_hash)  $($(package)_source)" > $($(package)_extract_dir)/.$($(package)_file_name).hash && \
+     $(build_SHA256SUM) -c $($(package)_extract_dir)/.$($(package)_file_name).hash && \
+    $(build_TAR) --no-same-owner -xf $($(package)_source)
+endef
+
+define $(package)_config_cmds
+  $($(package)_cmake) -S . -B .
+endef
+
+define $(package)_build_cmds
+  $(MAKE)
+endef
+
+define $(package)_stage_cmds
+  cmake --install . --prefix $($(package)_staging_prefix_dir)
+endef

depends/packages/packages.mk

@@ -19,6 +19,8 @@ zmq_packages=zeromq
 
 upnp_packages=miniupnpc
 
+libmdbx_packages=libmdbx
+
 multiprocess_packages = libmultiprocess capnp
 multiprocess_native_packages = native_libmultiprocess native_capnp
 

depends/toolchain.cmake.in

@@ -153,6 +153,13 @@ else()
   set(WITH_USDT ON CACHE BOOL "")
 endif()
 
+set(libmdbx_packages @libmdbx_packages@)
+if("${libmdbx_packages}" STREQUAL "")
+  set(WITH_MDBX OFF CACHE BOOL "")
+else()
+  set(WITH_MDBX ON CACHE BOOL "")
+endif()
+
 if("@no_harden@")
   set(ENABLE_HARDENING OFF CACHE BOOL "")
 else()

src/CMakeLists.txt

@@ -292,6 +292,7 @@ target_link_libraries(bitcoin_node
     Boost::headers
     $<TARGET_NAME_IF_EXISTS:libevent::libevent>
     $<TARGET_NAME_IF_EXISTS:libevent::pthreads>
+    $<TARGET_NAME_IF_EXISTS:MDBX::MDBX>
     $<TARGET_NAME_IF_EXISTS:MiniUPnPc::MiniUPnPc>
     $<TARGET_NAME_IF_EXISTS:bitcoin_zmq>
     $<TARGET_NAME_IF_EXISTS:USDT::headers>