fix: add android r8 rules

CHANGELOG.md

@@ -1,3 +1,13 @@
+# Unreleased
+
+- The Android AAR now ships targeted R8 consumer keep rules for the UniFFI/JNA FFI surface.
+
+# 0.7.0-rc.64 (Synonym Fork)
+
+## Bug Fixes
+
+- The Android AAR now ships targeted R8 consumer keep rules for the UniFFI/JNA FFI surface.
+
 # 0.7.0-rc.63 (Synonym Fork)
 
 ## Bug Fixes

Cargo.toml

@@ -4,7 +4,7 @@ exclude = ["bindings/uniffi-bindgen"]
 
 [package]
 name = "ldk-node"
-version = "0.7.0-rc.63"
+version = "0.7.0-rc.64"
 authors = ["Elias Rohrer <dev@tnull.de>"]
 homepage = "https://lightningdevkit.org/"
 license = "MIT OR Apache-2.0"

Package.swift

@@ -3,7 +3,7 @@
 
 import PackageDescription
 
-let tag = "v0.7.0-rc.63"
+let tag = "v0.7.0-rc.64"
 let checksum = "8890d1b91f2b3e0a33ffd2854e1a4e9721e99706e8378177d30fbc435cd2db49"
 let url = "https://github.com/synonymdev/ldk-node/releases/download/\(tag)/LDKNodeFFI.xcframework.zip"
 

bindings/kotlin/ldk-node-android/gradle.properties

@@ -3,4 +3,4 @@ android.useAndroidX=true
 android.enableJetifier=true
 kotlin.code.style=official
 group=com.synonym
-version=0.7.0-rc.63
+version=0.7.0-rc.64

bindings/kotlin/ldk-node-android/lib/build.gradle.kts

@@ -1,5 +1,6 @@
 import java.io.ByteArrayOutputStream
 import java.io.File
+import java.util.zip.ZipFile
 
 plugins {
     id("com.android.library")
@@ -158,8 +159,51 @@ val validateReleaseNativeLibraries by tasks.registering {
     }
 }
 
+val validateConsumerKeepRules by tasks.registering {
+    group = "verification"
+    description = "Validates Android consumer keep rules exist for R8."
+
+    val consumerRules = layout.projectDirectory.file("consumer-rules.pro")
+    inputs.file(consumerRules)
+
+    doLast {
+        val file = consumerRules.asFile
+        if (!file.isFile || file.readText().isBlank()) {
+            throw GradleException("Android consumer keep rules missing at '${file.path}'")
+        }
+    }
+}
+
 tasks.matching { it.name == "bundleReleaseAar" || it.name.startsWith("publish") }.configureEach {
-    dependsOn(validateReleaseNativeLibraries)
+    dependsOn(validateReleaseNativeLibraries, validateConsumerKeepRules)
+}
+
+tasks.matching { it.name == "bundleReleaseAar" }.configureEach {
+    doLast {
+        val aars = layout.buildDirectory.dir("outputs/aar").get().asFile
+            .listFiles()
+            ?.filter { it.isFile && it.name.endsWith(".aar") && it.name.contains("release") }
+            .orEmpty()
+
+        if (aars.isEmpty()) {
+            throw GradleException("Release AAR missing after bundleReleaseAar")
+        }
+
+        aars.forEach { aar ->
+            ZipFile(aar).use { zip ->
+                val entry = zip.getEntry("proguard.txt")
+                    ?: throw GradleException(
+                        "Release AAR is missing consumer keep rules (proguard.txt): '${aar.path}'"
+                    )
+                val text = zip.getInputStream(entry).bufferedReader().readText()
+                if (text.isBlank()) {
+                    throw GradleException(
+                        "Release AAR consumer keep rules are empty: '${aar.path}'"
+                    )
+                }
+            }
+        }
+    }
 }
 
 afterEvaluate {

bindings/kotlin/ldk-node-android/lib/consumer-rules.pro

@@ -0,0 +1,28 @@
+# Consumer keep rules for ldk-node Android bindings.
+# Packaged into the AAR and applied automatically when a consuming app enables R8.
+
+# JNA reads @Structure.FieldOrder and public fields by name, and constructs
+# Structure, Structure$ByValue, and Structure$ByReference types reflectively.
+-keepclassmembers class org.lightningdevkit.ldknode.** extends com.sun.jna.Structure {
+    <fields>;
+    <init>(...);
+}
+
+# JNA looks up Callback methods by name when building native function pointers.
+-keepclassmembers class org.lightningdevkit.ldknode.** implements com.sun.jna.Callback {
+    <methods>;
+}
+
+# UniFFI 0.28 loads UniffiLib via Native.load; JNA looks up interface methods by name.
+-keep,includedescriptorclasses interface org.lightningdevkit.ldknode.UniffiLib {
+    <methods>;
+}
+
+# @Structure.FieldOrder is read at runtime.
+-keepattributes RuntimeVisibleAnnotations
+
+# JNA's AAR references desktop AWT types that are absent on Android.
+-dontwarn java.awt.Component
+-dontwarn java.awt.GraphicsEnvironment
+-dontwarn java.awt.HeadlessException
+-dontwarn java.awt.Window

bindings/kotlin/ldk-node-jvm/gradle.properties

@@ -1,4 +1,4 @@
 org.gradle.jvmargs=-Xmx1536m
 kotlin.code.style=official
 group=com.synonym
-version=0.7.0-rc.63
+version=0.7.0-rc.64

bindings/python/pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "ldk_node"
-version = "0.7.0-rc.63"
+version = "0.7.0-rc.64"
 authors = [
   { name="Elias Rohrer", email="dev@tnull.de" },
 ]