From c03874e35a635b2e91098cb5df38fca440e0c1d1 Mon Sep 17 00:00:00 2001
From: Igor Sirotin <sirotin@status.im>
Date: Mon, 29 Sep 2025 21:45:23 +0100
Subject: [PATCH] feat: nwaku download script

---
 scripts/download_nwaku.sh | 37 +++++++++++++++++++++++++++++++++++++
 waku/Makefile             | 33 +++++++++++++++++++++++++++------
 2 files changed, 64 insertions(+), 6 deletions(-)
 create mode 100755 scripts/download_nwaku.sh

diff --git a/scripts/download_nwaku.sh b/scripts/download_nwaku.sh
new file mode 100755
index 0000000..a1b7a35
--- /dev/null
+++ b/scripts/download_nwaku.sh
@@ -0,0 +1,37 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+VERSION="${VERSION:-v0.36.0}"
+NWAKU_DIR="../third_party/nwaku"
+OS="$(uname | tr '[:upper:]' '[:lower:]')"
+ARCH="$(uname -m)"
+EXT="so"
+
+if [ ! -d "$NWAKU_DIR" ]; then
+  echo "Error: Directory $NWAKU_DIR does not exist. Please create it first."
+  exit 1
+fi
+
+case "$OS" in
+  darwin) OS="darwin" ;;
+  linux) OS="linux" ;;
+  *) echo "Unsupported OS: $OS"; exit 1 ;;
+esac
+
+case "$ARCH" in
+  x86_64|amd64) ARCH="x86_64" ;;
+  arm64|aarch64) ARCH="arm64" ;;
+  *) echo "Unsupported ARCH: $ARCH"; exit 1 ;;
+esac
+
+URL_BASE="https://github.com/waku-org/nwaku/releases/download"
+URL="${URL_BASE}/${VERSION}/libwaku-${VERSION}-${OS}-${ARCH}.${EXT}"
+HEADER_URL="${URL_BASE}/${VERSION}/libwaku.h"
+
+echo "Downloading nwaku $VERSION for $OS-$ARCH..."
+
+echo "Downloading library header from $HEADER_URL"
+curl -sfL -o "$NWAKU_DIR/libwaku.h" "$HEADER_URL"
+
+echo "Downloading library binary from $URL"
+curl -sfL -o "$NWAKU_DIR/libwaku.${EXT}" "$URL"
\ No newline at end of file
diff --git a/waku/Makefile b/waku/Makefile
index b0f68a9..569adfe 100644
--- a/waku/Makefile
+++ b/waku/Makefile
@@ -1,15 +1,36 @@
 # Makefile for Waku Go Bindings
 
-# Directories
+# Determine OS and set library extension
+UNAME_S := $(shell uname -s)
+ifeq ($(UNAME_S),Linux)
+	EXT := so
+else ifeq ($(UNAME_S),Darwin)
+	EXT := so
+else ifeq ($(OS),Windows_NT)
+	EXT := dll
+else
+	$(error Unsupported OS: $(UNAME_S))
+endif
+
 THIRD_PARTY_DIR := $(shell pwd)/../third_party
 NWAKU_REPO := https://github.com/waku-org/nwaku
 NWAKU_DIR := $(THIRD_PARTY_DIR)/nwaku
+LIBWAKU_HEADER := $(NWAKU_DIR)/libwaku.h
+LIBWAKU := $(NWAKU_DIR)/libwaku.${EXT}
 
-.PHONY: all clean build-libwaku build
+.PHONY: all clean build libwaku
 
 # Default target
 all: build
 
+# Prepare third_party directory and clone nwaku
+# NOTE: Currently we download a library release.
+# 		In the future we should get nwaku from Nimble package manager.
+$(LIBWAKU) $(LIBWAKU_HEADER):
+	@../scripts/download_nwaku.sh
+
+libwaku: $(LIBWAKU) $(LIBWAKU_HEADER)
+
 # Build libwaku
 build-libwaku:
 	@echo "Building libwaku..."
@@ -17,14 +38,14 @@ build-libwaku:
 
 # Build Waku Go Bindings
 
-build: export CGO_CFLAGS = "-I${NWAKU_DIR}/library/"
-build: export CGO_LDFLAGS = "-L${NWAKU_DIR}/build/ -lwaku -L${NWAKU_DIR} -Wl,-rpath,${NWAKU_DIR}/build/"
-build:
+build: export CGO_CFLAGS = "-I${NWAKU_DIR}"
+build: export CGO_LDFLAGS = "-L${NWAKU_DIR} -lwaku -L${NWAKU_DIR} -Wl,-rpath,${NWAKU_DIR}"
+build: libwaku
 	@echo "Building Waku Go Bindings..."
 	go build ./...
 
 # Clean up generated files
 clean:
 	@echo "Cleaning up..."
-	@rm -rf $(THIRD_PARTY_DIR)
+	@rm -f $(LIBWAKU_HEADER) $(LIBWAKU)
 	@rm -f waku-go-bindings
\ No newline at end of file