WIP: libbitcoinsv2 C header API

Standalone library with Stratum v2 functionality.

TODO: ?

CMakeLists.txt

@@ -171,6 +171,8 @@ endif()
 
 option(WITH_SV2 "Enable Stratum v2 functionality." ON)
 
+option(BUILD_SV2_LIB "Build experimental bitcoinsv2 library." OFF)
+
 cmake_dependent_option(BUILD_GUI_TESTS "Build test_bitcoin-qt executable." ON "BUILD_GUI;BUILD_TESTS" OFF)
 if(BUILD_GUI)
   set(qt_components Core Gui Widgets LinguistTools)
@@ -245,6 +247,7 @@ if(BUILD_FOR_FUZZING)
   set(WITH_MINIUPNPC OFF)
   set(WITH_ZMQ OFF)
   set(WITH_SV2 OFF)
+  set(BUILD_SV2_LIB OFF)
   set(BUILD_TESTS OFF)
   set(BUILD_GUI_TESTS OFF)
   set(BUILD_BENCH OFF)
@@ -627,6 +630,7 @@ message("  USDT tracing ........................ ${WITH_USDT}")
 message("  QR code (GUI) ....................... ${WITH_QRENCODE}")
 message("  DBus (GUI, Linux only) .............. ${WITH_DBUS}")
 message("  Stratum v2 .......................... ${WITH_SV2}")
+message("  libbitcoinsv2 (experimental) ........ ${BUILD_SV2_LIB}")
 message("Tests:")
 message("  test_bitcoin ........................ ${BUILD_TESTS}")
 message("  test_bitcoin-qt ..................... ${BUILD_GUI_TESTS}")

libbitcoinsv2.pc.in

@@ -0,0 +1,11 @@
+prefix=@CMAKE_INSTALL_PREFIX@
+exec_prefix=${prefix}
+libdir=${prefix}/@CMAKE_INSTALL_LIBDIR@
+includedir=${prefix}/@CMAKE_INSTALL_INCLUDEDIR@
+
+Name: @PACKAGE_NAME@ sv2 library
+Description: Experimental library for the Bitcoin Core Stratum v2 functionality.
+Version: @PACKAGE_VERSION@
+Libs: -L${libdir} -lbitcoinsv2
+Libs.private: -L${libdir} @LIBS_PRIVATE@
+Cflags: -I${includedir}

src/sv2/CMakeLists.txt

@@ -14,3 +14,11 @@ target_link_libraries(bitcoin_sv2
     bitcoin_crypto
     $<$<PLATFORM_ID:Windows>:ws2_32>
 )
+
+if (BUILD_SV2_LIB)
+  install(FILES bitcoinsv2.h DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
+
+  configure_file(${PROJECT_SOURCE_DIR}/libbitcoinsv2.pc.in ${PROJECT_BINARY_DIR}/libbitcoinsv2.pc @ONLY)
+  install(FILES ${PROJECT_BINARY_DIR}/libbitcoinsv2.pc DESTINATION "${CMAKE_INSTALL_LIBDIR}/pkgconfig")
+
+endif()

src/sv2/bitcoinsv2.h

@@ -0,0 +1,63 @@
+// Copyright (c) 2024-present 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_SV2_BITCOINSV2_H
+#define BITCOIN_SV2_BITCOINSV2_H
+
+#ifndef __cplusplus
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+#else
+#include <cstddef>
+#include <cstdint>
+#endif // __cplusplus
+
+
+#if !defined(BITCOINSV2_GNUC_PREREQ)
+#if defined(__GNUC__) && defined(__GNUC_MINOR__)
+#define BITCOINSV2_GNUC_PREREQ(_maj, _min) \
+    ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((_maj) << 16) + (_min))
+#else
+#define BITCOINSV2_GNUC_PREREQ(_maj, _min) 0
+#endif
+#endif
+
+/* Warning attributes */
+#if defined(__GNUC__) && BITCOINSV2_GNUC_PREREQ(3, 4)
+#define BITCOINSV2_WARN_UNUSED_RESULT __attribute__((__warn_unused_result__))
+#else
+#define BITCOINSV2_WARN_UNUSED_RESULT
+#endif
+#if !defined(BITCOINSV2_BUILD) && defined(__GNUC__) && BITCOINSV2_GNUC_PREREQ(3, 4)
+#define BITCOINSV2_ARG_NONNULL(_x) __attribute__((__nonnull__(_x)))
+#else
+#define BITCOINSV2_ARG_NONNULL(_x)
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif // __cplusplus
+
+/**
+ * ------ Context ------
+ *
+ * The library provides Stratum v2 functionality.
+ *
+ * ------ Error handling ------
+ *
+ * TODO
+ *
+ * ------ Pointer and argument conventions ------
+ *
+ * TODO
+ */
+
+// TODO: some actual methods
+
+#ifdef __cplusplus
+} // extern "C"
+#endif // __cplusplus
+
+#endif // BITCOIN_SV2_BITCOINSV2_H