Add s390x and x32 jobs to CI.

.github/workflows/ci-expanded.yml

@@ -337,13 +337,26 @@ jobs:
             boost: "--build-boost"
             options: "--enable-isystem"
 
+          - image: ubuntu-24.04
+            config: "debug"
+            link: "static"
+            cc: "s390x-linux-gnu-gcc"
+            cxx: "s390x-linux-gnu-g++"
+            flags: ""
+            coverage: ""
+            package: "gcc-s390x-linux-gnu g++-s390x-linux-gnu qemu-user-static"
+            host: "s390x-linux-gnu"
+            boost: ""
+            options: "--enable-isystem --build-skip-tests"
+
     runs-on: ${{ matrix.image }}
 
     env:
       CC: '${{ matrix.cc }}'
       CXX: '${{ matrix.cxx }}'
       CFLAGS: '${{ matrix.flags }}'
       CXXFLAGS: '${{ matrix.flags }}'
+      QEMU_LD_PREFIX: "${{ matrix.host && format('/usr/{0}', matrix.host) || '' }}"
 
     steps:
       - name: Get branch name
@@ -451,6 +464,35 @@ jobs:
               echo "LDFLAGS=-Wl,-rpath,${{ github.workspace }}/prefix/lib" >> $GITHUB_ENV
           fi
 
+      - name: Verify emulation [cross]
+        if: ${{ matrix.host }}
+        shell: bash
+        working-directory: ${{ github.workspace }}
+        run: |
+          echo 'int main() { return 0; }' > emulation.c
+          ${{ matrix.cc }} emulation.c -o emulation
+          file emulation
+          ./emulation
+
+      - name: Install boost headers [cross]
+        if: ${{ matrix.host }}
+        shell: bash
+        working-directory: 'libbitcoin-node'
+        env:
+          CC: 'gcc'
+          CXX: 'g++'
+        run: >
+          ./builds/gnu/install-gnu.sh
+          --build-use-local-src
+          --build-src-dir="${{ github.workspace }}"
+          --prefix="${{ github.workspace }}/prefix"
+          --build-obj-dir="obj"
+          --build-obj-dir-relative
+          --build-config="${{ matrix.config }}"
+          --build-link="${{ matrix.link }}"
+          --build-limit=external
+          --build-boost
+
       - name: Execute installation
         shell: bash
         working-directory: 'libbitcoin-node'
@@ -466,6 +508,7 @@ jobs:
           --build-link="${{ matrix.link }}"
           ${{ matrix.boost }}
           ${{ matrix.options }}
+          ${{ matrix.host && format('--host={0} --with-boost={1}/prefix', matrix.host, github.workspace) || '' }}
 
       - name: Coverage calculation
         if: ${{ matrix.coverage == 'lcov' }}

.github/workflows/ci.yml

@@ -118,13 +118,26 @@ jobs:
             boost: "--build-boost"
             options: "--enable-isystem"
 
+          - image: ubuntu-24.04
+            config: "debug"
+            link: "static"
+            cc: "s390x-linux-gnu-gcc"
+            cxx: "s390x-linux-gnu-g++"
+            flags: ""
+            coverage: ""
+            package: "gcc-s390x-linux-gnu g++-s390x-linux-gnu qemu-user-static"
+            host: "s390x-linux-gnu"
+            boost: ""
+            options: "--enable-isystem --build-skip-tests"
+
     runs-on: ${{ matrix.image }}
 
     env:
       CC: '${{ matrix.cc }}'
       CXX: '${{ matrix.cxx }}'
       CFLAGS: '${{ matrix.flags }}'
       CXXFLAGS: '${{ matrix.flags }}'
+      QEMU_LD_PREFIX: "${{ matrix.host && format('/usr/{0}', matrix.host) || '' }}"
 
     steps:
       - name: Get branch name
@@ -232,6 +245,35 @@ jobs:
               echo "LDFLAGS=-Wl,-rpath,${{ github.workspace }}/prefix/lib" >> $GITHUB_ENV
           fi
 
+      - name: Verify emulation [cross]
+        if: ${{ matrix.host }}
+        shell: bash
+        working-directory: ${{ github.workspace }}
+        run: |
+          echo 'int main() { return 0; }' > emulation.c
+          ${{ matrix.cc }} emulation.c -o emulation
+          file emulation
+          ./emulation
+
+      - name: Install boost headers [cross]
+        if: ${{ matrix.host }}
+        shell: bash
+        working-directory: 'libbitcoin-node'
+        env:
+          CC: 'gcc'
+          CXX: 'g++'
+        run: >
+          ./builds/gnu/install-gnu.sh
+          --build-use-local-src
+          --build-src-dir="${{ github.workspace }}"
+          --prefix="${{ github.workspace }}/prefix"
+          --build-obj-dir="obj"
+          --build-obj-dir-relative
+          --build-config="${{ matrix.config }}"
+          --build-link="${{ matrix.link }}"
+          --build-limit=external
+          --build-boost
+
       - name: Execute installation
         shell: bash
         working-directory: 'libbitcoin-node'
@@ -247,6 +289,7 @@ jobs:
           --build-link="${{ matrix.link }}"
           ${{ matrix.boost }}
           ${{ matrix.options }}
+          ${{ matrix.host && format('--host={0} --with-boost={1}/prefix', matrix.host, github.workspace) || '' }}
 
       - name: Coverage calculation
         if: ${{ matrix.coverage == 'lcov' }}
@@ -825,6 +868,12 @@ jobs:
             version: "vs2026"
             tests: "*"
 
+          - image: windows-latest
+            configuration: "StaticRelease"
+            platform: "Win32"
+            version: "vs2026"
+            tests: "*"
+
     runs-on: ${{ matrix.image }}
 
     steps:

builds/cmake/CMakeLists.txt

@@ -76,6 +76,10 @@ if ( MSVC )
   set( CMAKE_SHARED_LIBRARY_PREFIX "lib" )
 endif()
 
+include(CheckCCompilerFlag)
+include(CheckCXXCompilerFlag)
+include(CheckCXXSourceCompiles)
+
 #------------------------------------------------------------------------------
 # Project options.
 #------------------------------------------------------------------------------
@@ -102,12 +106,13 @@ set( libbitcoin_network_VERSION ${libbitcoin-network_VERSION} )
 
 find_package( Boost 1.86.0 REQUIRED )
 
+#------------------------------------------------------------------------------
+# Architecture options.
+#------------------------------------------------------------------------------
+
 #------------------------------------------------------------------------------
 # Compiler options.
 #------------------------------------------------------------------------------
-include(CheckCCompilerFlag)
-include(CheckCXXCompilerFlag)
-include(CheckCXXSourceCompiles)
 
 check_cxx_compiler_flag( "-Wall" HAS_FLAG_WALL )
 if ( !HAS_FLAG_WALL )

builds/cmake/install-cmake.sh

@@ -156,25 +156,25 @@ main()
 
     CONFIGURE_OPTIONS_ORIGINAL=("$@")
     CONFIGURE_OPTIONS=("$@")
-    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/--build-boost/}")
-    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/--build-secp256k1/}")
-    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/--build-src-dir=*/}")
-    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/--build-obj-dir=*/}")
-    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/--build-obj-dir-relative/}")
-    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/--build-limit=*/}")
-    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/--build-config=*/}")
-    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/--build-link=*/}")
-    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/--build-full-repositories/}")
-    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/--build-post-install-clean/}")
-    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/--build-skip-tests/}")
-    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/--build-parallel=*/}")
-    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/--build-use-local-src/}")
-    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/--prefix=*/}")
-    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/--hardware-optimized/}")
-    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/--noninteractive/}")
-    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/--verbose/}")
-    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/--help/}")
-    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/-h/}")
+    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/#--build-boost/}")
+    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/#--build-secp256k1/}")
+    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/#--build-src-dir=*/}")
+    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/#--build-obj-dir=*/}")
+    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/#--build-obj-dir-relative/}")
+    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/#--build-limit=*/}")
+    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/#--build-config=*/}")
+    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/#--build-link=*/}")
+    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/#--build-full-repositories/}")
+    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/#--build-post-install-clean/}")
+    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/#--build-skip-tests/}")
+    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/#--build-parallel=*/}")
+    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/#--build-use-local-src/}")
+    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/#--prefix=*/}")
+    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/#--hardware-optimized/}")
+    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/#--noninteractive/}")
+    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/#--verbose/}")
+    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/#--help/}")
+    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/#-h/}")
     CONFIGURE_OPTIONS_CMAKE=("${CONFIGURE_OPTIONS[@]}")
     msg_verbose "*** ARGUMENTS: ${CONFIGURE_OPTIONS_ORIGINAL[*]}"
     msg_verbose "*** SANITIZED: ${CONFIGURE_OPTIONS[*]}"
@@ -387,6 +387,14 @@ main()
         msg_verbose "CXX using defined value '${CXX}'"
     fi
 
+    if [[ -z "${MACOSX_DEPLOYMENT_TARGET}" ]]; then
+        if [[ ${OS} == Darwin ]]; then
+            export MACOSX_DEPLOYMENT_TARGET=$(sw_vers -productVersion)
+        fi
+    else
+        msg_verbose "MACOSX_DEPLOYMENT_TARGET using defined value '${MACOSX_DEPLOYMENT_TARGET}'"
+    fi
+
     # HARDWARE_OPTIMIZED
     if [[ "${HARDWARE_OPTIMIZED}" == "yes" ]]; then
         ARCHTUNE="-march=native -mtune=native"

builds/cmake/install-presets.sh

@@ -142,21 +142,21 @@ main()
 
     CONFIGURE_OPTIONS_ORIGINAL=("$@")
     CONFIGURE_OPTIONS=("$@")
-    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/--build-boost/}")
-    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/--build-secp256k1/}")
-    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/--build-preset=*/}")
-    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/--build-src-dir=*/}")
-    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/--build-limit=*/}")
-    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/--build-full-repositories/}")
-    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/--build-post-install-clean/}")
-    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/--build-skip-tests/}")
-    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/--build-parallel=*/}")
-    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/--build-use-local-src/}")
-    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/--hardware-optimized/}")
-    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/--noninteractive/}")
-    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/--verbose/}")
-    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/--help/}")
-    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/-h/}")
+    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/#--build-boost/}")
+    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/#--build-secp256k1/}")
+    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/#--build-preset=*/}")
+    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/#--build-src-dir=*/}")
+    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/#--build-limit=*/}")
+    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/#--build-full-repositories/}")
+    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/#--build-post-install-clean/}")
+    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/#--build-skip-tests/}")
+    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/#--build-parallel=*/}")
+    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/#--build-use-local-src/}")
+    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/#--hardware-optimized/}")
+    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/#--noninteractive/}")
+    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/#--verbose/}")
+    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/#--help/}")
+    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/#-h/}")
     CONFIGURE_OPTIONS_CMAKE=("${CONFIGURE_OPTIONS[@]}")
     msg_verbose "*** ARGUMENTS: ${CONFIGURE_OPTIONS_ORIGINAL[*]}"
     msg_verbose "*** SANITIZED: ${CONFIGURE_OPTIONS[*]}"
@@ -403,6 +403,14 @@ main()
         msg_verbose "CXX using defined value '${CXX}'"
     fi
 
+    if [[ -z "${MACOSX_DEPLOYMENT_TARGET}" ]]; then
+        if [[ ${OS} == Darwin ]]; then
+            export MACOSX_DEPLOYMENT_TARGET=$(sw_vers -productVersion)
+        fi
+    else
+        msg_verbose "MACOSX_DEPLOYMENT_TARGET using defined value '${MACOSX_DEPLOYMENT_TARGET}'"
+    fi
+
     # HARDWARE_OPTIMIZED
     if [[ "${HARDWARE_OPTIMIZED}" == "yes" ]]; then
         ARCHTUNE="-march=native -mtune=native"

builds/gnu/Makefile.am

@@ -54,6 +54,7 @@ src_libbitcoin_node_la_SOURCES = \
     ${srcdir}/../../src/block_arena.cpp \
     ${srcdir}/../../src/block_memory.cpp \
     ${srcdir}/../../src/configuration.cpp \
+    ${srcdir}/../../src/define.cpp \
     ${srcdir}/../../src/error.cpp \
     ${srcdir}/../../src/estimator.cpp \
     ${srcdir}/../../src/full_node.cpp \

builds/gnu/install-gnu.sh

@@ -154,26 +154,26 @@ main()
 
     CONFIGURE_OPTIONS_ORIGINAL=("$@")
     CONFIGURE_OPTIONS=("$@")
-    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/--build-boost/}")
-    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/--build-secp256k1/}")
-    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/--build-src-dir=*/}")
-    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/--build-obj-dir=*/}")
-    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/--build-obj-dir-relative/}")
-    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/--build-limit=*/}")
-    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/--build-config=*/}")
-    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/--build-link=*/}")
-    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/--build-full-repositories/}")
-    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/--build-post-install-clean/}")
-    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/--build-skip-tests/}")
-    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/--build-valgrind=*/}")
-    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/--build-parallel=*/}")
-    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/--build-use-local-src/}")
-    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/--prefix=*/}")
-    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/--hardware-optimized/}")
-    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/--noninteractive/}")
-    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/--verbose/}")
-    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/--help/}")
-    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/-h/}")
+    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/#--build-boost/}")
+    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/#--build-secp256k1/}")
+    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/#--build-src-dir=*/}")
+    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/#--build-obj-dir=*/}")
+    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/#--build-obj-dir-relative/}")
+    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/#--build-limit=*/}")
+    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/#--build-config=*/}")
+    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/#--build-link=*/}")
+    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/#--build-full-repositories/}")
+    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/#--build-post-install-clean/}")
+    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/#--build-skip-tests/}")
+    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/#--build-valgrind=*/}")
+    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/#--build-parallel=*/}")
+    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/#--build-use-local-src/}")
+    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/#--prefix=*/}")
+    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/#--hardware-optimized/}")
+    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/#--noninteractive/}")
+    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/#--verbose/}")
+    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/#--help/}")
+    CONFIGURE_OPTIONS=("${CONFIGURE_OPTIONS[@]/#-h/}")
     CONFIGURE_OPTIONS_CMAKE=()
     CONFIGURE_OPTIONS_GNU=("${CONFIGURE_OPTIONS[@]}")
     msg_verbose "*** ARGUMENTS: ${CONFIGURE_OPTIONS_ORIGINAL[*]}"
@@ -392,6 +392,14 @@ main()
         msg_verbose "CXX using defined value '${CXX}'"
     fi
 
+    if [[ -z "${MACOSX_DEPLOYMENT_TARGET}" ]]; then
+        if [[ ${OS} == Darwin ]]; then
+            export MACOSX_DEPLOYMENT_TARGET=$(sw_vers -productVersion)
+        fi
+    else
+        msg_verbose "MACOSX_DEPLOYMENT_TARGET using defined value '${MACOSX_DEPLOYMENT_TARGET}'"
+    fi
+
     # HARDWARE_OPTIMIZED
     if [[ "${HARDWARE_OPTIMIZED}" == "yes" ]]; then
         ARCHTUNE="-march=native -mtune=native"

builds/msvc/vs2026/libbitcoin-node/libbitcoin-node.vcxproj

@@ -124,6 +124,7 @@
     <ClCompile Include="..\..\..\..\src\chasers\chaser_validate_capture.cpp" />
     <ClCompile Include="..\..\..\..\src\chasers\chaser_validate_parallel.cpp" />
     <ClCompile Include="..\..\..\..\src\configuration.cpp" />
+    <ClCompile Include="..\..\..\..\src\define.cpp" />
     <ClCompile Include="..\..\..\..\src\error.cpp" />
     <ClCompile Include="..\..\..\..\src\estimator.cpp" />
     <ClCompile Include="..\..\..\..\src\full_node.cpp" />

builds/msvc/vs2026/libbitcoin-node/libbitcoin-node.vcxproj.filters

@@ -102,6 +102,9 @@
     <ClCompile Include="..\..\..\..\src\configuration.cpp">
       <Filter>src</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\src\define.cpp">
+      <Filter>src</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\src\error.cpp">
       <Filter>src</Filter>
     </ClCompile>

include/bitcoin/node/estimator.hpp

@@ -36,7 +36,7 @@ class BCN_API estimator
 public:
     typedef std::unique_ptr<estimator> ptr;
     static constexpr size_t maximum_horizon = 1008;
-    static constexpr size_t estimate_failed = max_uint64;
+    static constexpr uint64_t estimate_failed = max_uint64;
 
     DELETE_COPY_MOVE_DESTRUCT(estimator);