# Bitflash — top-level build
#
#   make linux    build Bitflash-*-x86_64.AppImage
#   make windows  build Bitflash-*-windows.zip (from MSYS2 UCRT64)
#   make windows-tor build Bitflash-*-windows-with-tor.zip
#   make tests    build and run standalone unit tests
#   make checksums create SHA256SUMS for release assets
#   make verify-release TAG=v1.2.13
#   make clean    remove build artifacts

ROOT    := $(shell pwd)
NPROC   := $(shell nproc 2>/dev/null || echo 2)
SUDO    := $(shell [ "$$(id -u)" = "0" ] && echo "" || echo "sudo")
# Not "1.2.20". This tree is upstream v1.2.20 plus our own hardening commits and
# a hand-merged payout ledger, so a binary built here must not be mistakable for
# the upstream release of that number -- it names every release artifact.
VERSION := 1.2.20+sec

# ---- Pinned third-party sources -------------------------------------------
#
# These were `git clone --depth 1 <url>` with no revision, which resolves to
# whatever the default branch happens to point at the moment the build runs.
# For a dependency that only had to link, that is untidy. For these two it is
# not:
#
#   RandomX is the proof of work. Its master is not frozen -- v2.0 (Mar 2026)
#   changed the algorithm -- so two builds of the same Bitflash commit, made a
#   few weeks apart, can compute different hashes for the same header. That is
#   not a supply-chain worry, it is a chain split arriving as a build artifact,
#   with no version recorded anywhere to explain it afterwards.
#
#   libsecp256k1 is signature verification, i.e. the rule deciding who may
#   spend. Whatever is on master on the day of the build is what enforces it.
#
# Pinned to full commit ids, not tags: a tag is a mutable pointer, and `git
# checkout <sha>` is the only form here that verifies what it fetched (git
# resolves the object by its own hash). Bump deliberately, and rebuild and
# resync before shipping the result.
#
# The check has to decide the exit status, so each recipe below joins its
# commands with && the whole way to the closing echo. Ending that chain with a
# `;` meant a failed `test` only skipped the build steps: the echo still ran,
# the target still exited 0, and make announced a pinned dependency that
# nothing had verified.
#
# RandomX pin is the commit this tree has been building and syncing against
# (post-v2.0.1 master, 2026-05-24) -- identical to upstream's pin.
#
# libsecp256k1 is pinned to upstream v1.2.18's commit rather than the one this
# fork carried, so signature validation matches the binaries the rest of the
# network runs. Consensus code must not differ from the network by accident.
# There must be exactly ONE assignment of each of these variables in this file:
# upstream defines them near the top too, and GNU Make takes the last `:=`, so
# a second block silently decides the build.
SECP256K1_REPO   := https://github.com/bitcoin-core/secp256k1
SECP256K1_COMMIT := 7fecac74aed8e1fd9078380d67dd04663705c989
RANDOMX_REPO     := https://github.com/tevador/RandomX
RANDOMX_COMMIT   := 1e9d4b2df63fa6edf46b06789486e23c0fcaa55a

# appimagetool came from the "continuous" release, a tag that is moved in place
# on every upstream push, fetched over the network and executed. Pinned to a
# numbered release and checked by digest before it is allowed to run.
APPIMAGETOOL_URL    := https://github.com/AppImage/appimagetool/releases/download/1.9.1/appimagetool-x86_64.AppImage
APPIMAGETOOL_SHA256 := ed4ce84f0d9caff66f50bcca6ff6f35aae54ce8135408b3fa33abfc3cb384eb0

# ---- Linux ----------------------------------------------------------------

# RandomX used to build in $(HOME)/RandomX, and deps-randomx would rm -rf that
# path whenever the library was missing -- deleting a tree the build did not
# create and does not own (issue #27; a hand-managed pinned checkout there is
# what this machine's miners build against). The default is now in-tree, like
# secp256k1-build. A host that deliberately keeps RandomX elsewhere can set
# RANDOMX_DIR=... explicitly; the recipe below will still never delete a
# directory that lacks the marker file this build writes after a successful
# build. Exported so src/Makefile's own RANDOMX_DIR ?= picks the same tree.
#
# Every use of it below is quoted, and the recipe rejects a value that cannot
# name exactly one directory before it reaches anything destructive. Unquoted,
# the marker guard could be stepped around: a value holding a glob that matches
# two directories made `[ -d $(RANDOMX_DIR) ]` a two-argument test, which dies
# with "unexpected operator" instead of answering, so the && short-circuited,
# the guard was skipped, and the rm -rf below ran against every match. A value
# holding a space or a `&&` broke the outer test the same way and reported
# "already built". Whitespace and glob characters are refused outright rather
# than merely quoted, because src/Makefile interpolates this same value into
# -I$(RANDOMX_DIR)/src and -L$(RANDOMX_DIR)/build unquoted, where neither can
# survive. A relative value is refused rather than silently made absolute: it
# would mean two different directories to this Makefile and to src/Makefile,
# whose cwd is src/, and a command-line assignment reaches the sub-make through
# MAKEFLAGS, where it outranks anything exported from here.
RANDOMX_DIR ?= $(ROOT)/randomx-build
export RANDOMX_DIR

linux: deps-linux
	$(MAKE) -C src -f Makefile -j$(NPROC)
	strip src/bitflash
	$(MAKE) -f Makefile appimage
	$(MAKE) -f Makefile linux-node

# Headless node, no ImGui/GLFW/OpenGL. The GUI build needs libGL present at load
# time even when started with -nogui -- the dynamic loader resolves everything
# before main() runs, so the flag comes far too late. On a clean server, which is
# where a node most naturally lives, that is a hard failure. This binary has no
# such dependency and needs no FUSE either, so it drops onto a VPS and runs.
linux-node: deps-linux
	$(MAKE) -C src -f Makefile bitflash-node -j$(NPROC)
	strip src/bitflash-node
	cp src/bitflash-node bitflash-node-$(VERSION)-x86_64
	@echo "Built: bitflash-node-$(VERSION)-x86_64"

deps-linux: deps-apt deps-secp256k1 deps-randomx

# libboost-dev, not libboost-system-dev: Boost.System has been header-only
# since 1.69 and Ubuntu 26.04 (resolute) no longer ships the -system package.
# This tree only includes two boost headers and links no boost library. The
# apt-get update comes first: a fresh image's package lists are empty, and
# install then fails on the first name it cannot find.
#
# A failed update is deliberately not fatal: one unreachable repository should
# not block an install the lists already on disk can satisfy. It does say so,
# though -- "unable to locate package" several seconds later is otherwise hard
# to connect back to it. The install is the last command in the branch, so its
# status is the target's, and that one does abort.
deps-apt:
	@if command -v apt-get >/dev/null 2>&1; then \
	  $(SUDO) apt-get update || \
	    echo "  warning: apt-get update failed, using the package lists on disk"; \
	  $(SUDO) apt-get install -y build-essential cmake git pkg-config autoconf \
	    libtool libssl-dev libdb5.3++-dev libsodium-dev nlohmann-json3-dev \
	    libboost-dev libglfw3-dev libgl-dev libsqlite3-dev \
	    python3-pil clang; \
	else \
	  echo "Not an apt system — install: g++ cmake git autoconf libtool"; \
	  echo "  libssl libdb++ libsodium nlohmann-json boost glfw3 opengl sqlite3 python3-pil"; \
	fi

deps-secp256k1:
	@if [ ! -f /usr/local/lib/libsecp256k1.a ]; then \
	  echo "==> building libsecp256k1"; \
	  rm -rf $(ROOT)/secp256k1-build && \
	  git init -q $(ROOT)/secp256k1-build && \
	  cd $(ROOT)/secp256k1-build && \
	  git remote add origin $(SECP256K1_REPO) && \
	  git fetch -q --depth 1 origin $(SECP256K1_COMMIT) && \
	  git checkout -q --detach FETCH_HEAD && \
	  test "$$(git rev-parse HEAD)" = "$(SECP256K1_COMMIT)" && \
	  echo "==> libsecp256k1 pinned at $(SECP256K1_COMMIT)" && \
	  cd $(ROOT)/secp256k1-build && ./autogen.sh && \
	  ./configure --enable-module-schnorrsig --enable-module-extrakeys \
	    --disable-shared --with-pic --disable-benchmark --disable-tests && \
	  make -j$(NPROC) && $(SUDO) make install && $(SUDO) ldconfig && \
	  echo "==> libsecp256k1 done"; \
	else \
	  echo "==> libsecp256k1 already installed"; \
	fi

deps-randomx:
	@ws="$$(printf ' \t')"; \
	case "$(RANDOMX_DIR)" in \
	  "")        echo "ERROR: RANDOMX_DIR is empty"; exit 1 ;; \
	  /)         echo "ERROR: RANDOMX_DIR is /, refusing"; exit 1 ;; \
	  *[$$ws]*)  echo "ERROR: RANDOMX_DIR contains whitespace: $(RANDOMX_DIR)"; exit 1 ;; \
	  *[*?[]*)   echo "ERROR: RANDOMX_DIR contains a glob character: $(RANDOMX_DIR)"; exit 1 ;; \
	  /*)        ;; \
	  *)         echo "ERROR: RANDOMX_DIR must be an absolute path: $(RANDOMX_DIR)"; exit 1 ;; \
	esac
	@if [ ! -f "$(RANDOMX_DIR)/build/librandomx.a" ]; then \
	  if [ -d "$(RANDOMX_DIR)" ] && [ ! -f "$(RANDOMX_DIR)/.bitflash-built" ]; then \
	    echo "ERROR: $(RANDOMX_DIR) exists but was not created by this build"; \
	    echo "       refusing to rm -rf it -- remove it yourself or set RANDOMX_DIR"; \
	    exit 1; \
	  fi; \
	  echo "==> building RandomX"; \
	  rm -rf "$(RANDOMX_DIR)" && \
	  git init -q "$(RANDOMX_DIR)" && \
	  cd "$(RANDOMX_DIR)" && \
	  git remote add origin $(RANDOMX_REPO) && \
	  git fetch -q --depth 1 origin $(RANDOMX_COMMIT) && \
	  git checkout -q --detach FETCH_HEAD && \
	  test "$$(git rev-parse HEAD)" = "$(RANDOMX_COMMIT)" && \
	  echo "==> RandomX pinned at $(RANDOMX_COMMIT)" && \
	  mkdir -p "$(RANDOMX_DIR)/build" && \
	  cd "$(RANDOMX_DIR)/build" && cmake .. -DCMAKE_BUILD_TYPE=Release && \
	  make -j$(NPROC) randomx && \
	  touch "$(RANDOMX_DIR)/.bitflash-built" && \
	  echo "==> RandomX done"; \
	else \
	  echo "==> RandomX already built"; \
	fi

# APPDIR and the tool both used fixed paths under /tmp, on a directory every
# local account can write. `[ ! -x /tmp/appimagetool ]` means an executable
# already sitting at that name is taken as the tool and run, so anyone with a
# shell on the build machine could have put one there first and had it execute
# as whoever ran make; `rm -rf /tmp/bitflash.AppDir` then mkdir is the same
# problem one step later, through symlinks. Both now live under the build tree,
# which the build already owns.
APPDIR       := $(ROOT)/build/bitflash.AppDir
APPIMAGETOOL := $(ROOT)/build/appimagetool

appimage: src/bitflash
	@echo "==> building AppImage"
	@mkdir -p $(ROOT)/build
	@if [ ! -x "$(APPIMAGETOOL)" ]; then \
	  echo "  fetching appimagetool"; \
	  wget -q "$(APPIMAGETOOL_URL)" -O "$(APPIMAGETOOL).tmp" || \
	    { echo "  ERROR: appimagetool download failed"; rm -f "$(APPIMAGETOOL).tmp"; exit 1; }; \
	  echo "$(APPIMAGETOOL_SHA256)  $(APPIMAGETOOL).tmp" | sha256sum -c - >/dev/null 2>&1 || \
	    { echo "  ERROR: appimagetool digest mismatch, refusing to run it"; \
	      echo "         expected $(APPIMAGETOOL_SHA256)"; \
	      echo "         got      $$(sha256sum "$(APPIMAGETOOL).tmp" | cut -d" " -f1)"; \
	      rm -f "$(APPIMAGETOOL).tmp"; exit 1; }; \
	  chmod +x "$(APPIMAGETOOL).tmp" && mv "$(APPIMAGETOOL).tmp" "$(APPIMAGETOOL)"; \
	fi
	@rm -rf $(APPDIR)
	@mkdir -p $(APPDIR)/usr/bin \
	          $(APPDIR)/usr/lib \
	          $(APPDIR)/usr/share/applications \
	          $(APPDIR)/usr/share/icons/hicolor/256x256/apps
	@cp src/bitflash $(APPDIR)/usr/bin/bitflash
	@printf '#!/bin/sh\nHERE="$$(dirname "$$(readlink -f "$$0")")"\nexport LD_LIBRARY_PATH="$$HERE/usr/lib:$$LD_LIBRARY_PATH"\nexec "$$HERE/usr/bin/bitflash" "$$@"\n' \
	  > $(APPDIR)/AppRun && chmod +x $(APPDIR)/AppRun
	@printf '[Desktop Entry]\nName=Bitflash\nExec=bitflash\nIcon=bitflash\nType=Application\nCategories=Finance;\n' \
	  > $(APPDIR)/bitflash.desktop
	@cp $(APPDIR)/bitflash.desktop \
	    $(APPDIR)/usr/share/applications/
	@APPDIR=$(APPDIR) python3 -c "\
import os; \
from PIL import Image; \
d = os.environ['APPDIR']; \
ico = Image.open('src/rc/bitcoin.ico'); \
img = ico.convert('RGBA'); \
img.save(d + '/bitflash.png'); \
import shutil; shutil.copy(d + '/bitflash.png', \
d + '/usr/share/icons/hicolor/256x256/apps/bitflash.png')"
	@for lib in libsodium.so.23 libdb_cxx-5.3.so libsqlite3.so.0 libglfw.so.3; do \
	  path=$$(ldconfig -p | grep " $$lib " | awk '{print $$NF}' | head -1); \
	  [ -z "$$path" ] && path=$$(find /usr/lib /lib -name "$$lib" 2>/dev/null | head -1); \
	  [ -n "$$path" ] && cp -L "$$path" $(APPDIR)/usr/lib/ && echo "  bundled $$lib" || echo "  missing $$lib"; \
	done
# appimagetool's output used to be piped through grep ... || true, which
# discarded its exit status: the target succeeded and announced "Built:"
# even when no AppImage existed. Run the tool bare so its status decides,
# then require the artefact to exist, be non-empty, and be newer than the
# binary it was packaged from before saying so.
	@ARCH=x86_64 $(APPIMAGETOOL) --no-appstream $(APPDIR) \
	  $(ROOT)/Bitflash-$(VERSION)-x86_64.AppImage
	@test -s $(ROOT)/Bitflash-$(VERSION)-x86_64.AppImage || \
	  { echo "ERROR: Bitflash-$(VERSION)-x86_64.AppImage missing or empty"; exit 1; }
	@test $(ROOT)/Bitflash-$(VERSION)-x86_64.AppImage -nt src/bitflash || \
	  { echo "ERROR: Bitflash-$(VERSION)-x86_64.AppImage is not newer than src/bitflash"; exit 1; }
	@echo "Built: Bitflash-$(VERSION)-x86_64.AppImage"

# ---- Windows (MSYS2 UCRT64) -----------------------------------------------

deps-windows:
	pacman -S --noconfirm --needed \
	  mingw-w64-ucrt-x86_64-gcc \
	  mingw-w64-ucrt-x86_64-make \
	  mingw-w64-ucrt-x86_64-glfw \
	  mingw-w64-ucrt-x86_64-openssl \
	  mingw-w64-ucrt-x86_64-db \
	  mingw-w64-ucrt-x86_64-sqlite3 \
	  mingw-w64-ucrt-x86_64-libsodium \
	  mingw-w64-ucrt-x86_64-nlohmann-json \
	  mingw-w64-ucrt-x86_64-boost \
	  mingw-w64-ucrt-x86_64-cmake \
	  autoconf automake libtool
	@if [ ! -f deps/lib/libsecp256k1.a ]; then \
	  rm -rf secp256k1-build && \
	  git init -q secp256k1-build && \
	  cd secp256k1-build && \
	  git remote add origin $(SECP256K1_REPO) && \
	  git fetch -q --depth 1 origin $(SECP256K1_COMMIT) && \
	  git checkout -q --detach FETCH_HEAD && \
	  test "$$(git rev-parse HEAD)" = "$(SECP256K1_COMMIT)" && \
	  echo "==> secp256k1 pinned at $(SECP256K1_COMMIT)" && \
	  cd $(ROOT)/secp256k1-build && ./autogen.sh && \
	  ./configure --prefix=$(ROOT)/deps \
	    --enable-module-schnorrsig --enable-module-extrakeys \
	    --disable-shared --with-pic --disable-benchmark --disable-tests && \
	  make install && \
	  echo "==> secp256k1 done"; \
	else \
	  echo "==> secp256k1 already built"; \
	fi
	@if [ ! -f RandomX/build/librandomx.a ]; then \
	  rm -rf RandomX && \
	  git init -q RandomX && \
	  cd RandomX && \
	  git remote add origin $(RANDOMX_REPO) && \
	  git fetch -q --depth 1 origin $(RANDOMX_COMMIT) && \
	  git checkout -q --detach FETCH_HEAD && \
	  test "$$(git rev-parse HEAD)" = "$(RANDOMX_COMMIT)" && \
	  echo "==> RandomX pinned at $(RANDOMX_COMMIT)" && \
	  mkdir -p $(ROOT)/RandomX/build && \
	  cd $(ROOT)/RandomX/build && cmake .. -G "Unix Makefiles" -DCMAKE_BUILD_TYPE=Release && \
	  make randomx && \
	  echo "==> RandomX done"; \
	else \
	  echo "==> RandomX already built"; \
	fi

windows: deps-windows
	cd src && make -f makefile.mingw
	@rm -rf Bitflash-$(VERSION)-windows
	@mkdir -p Bitflash-$(VERSION)-windows
	@cp src/bitflash.exe Bitflash-$(VERSION)-windows/Bitflash.exe
	@ldd src/bitflash.exe | grep ucrt64 | awk '{print $$3}' | \
	  xargs -I{} cp {} Bitflash-$(VERSION)-windows/ 2>/dev/null || true
	@zip -r Bitflash-$(VERSION)-windows.zip Bitflash-$(VERSION)-windows/
	@echo "Built: Bitflash-$(VERSION)-windows.zip"

windows-tor: windows
	./scripts/package-windows-tor.sh

# ---- Clean ----------------------------------------------------------------

clean:
	$(MAKE) -C src -f Makefile clean 2>/dev/null || true
	cd src && make -f makefile.mingw clean 2>/dev/null || true
	rm -f Bitflash-*.AppImage Bitflash-*.zip
	rm -rf Bitflash-*-windows build

tests:
	$(MAKE) -C src -f Makefile tests

fuzz-net-message-smoke: deps-linux
	$(MAKE) -C src -f Makefile fuzz-net-message-smoke

fuzz-script-smoke: deps-linux
	$(MAKE) -C src -f Makefile fuzz-script-smoke

checksums:
	./scripts/make-release-checksums.sh

sign-checksums:
	./scripts/make-release-checksums.sh --sign $(if $(KEY),--local-user $(KEY),)

verify-release:
	./scripts/verify-release.sh $(if $(TAG),$(TAG),latest)

.PHONY: linux windows windows-tor clean appimage \
        tests fuzz-net-message-smoke fuzz-script-smoke checksums sign-checksums verify-release \
        deps-linux deps-windows deps-apt deps-secp256k1 deps-randomx