chore: extract Ed25519 shadow setup into convention plugin

Consolidates the repeated test sourceSet + eddsa dependency into
a single `flipcash.android.ed25519.shadow` convention plugin.

Author: bmc08gt

build-logic/convention/build.gradle.kts

@@ -37,5 +37,9 @@ gradlePlugin {
             id = "flipcash.android.feature"
             implementationClass = "AndroidFeatureConventionPlugin"
         }
+        register("androidEd25519Shadow") {
+            id = "flipcash.android.ed25519.shadow"
+            implementationClass = "AndroidEd25519ShadowConventionPlugin"
+        }
     }
 }

build-logic/convention/src/main/kotlin/AndroidEd25519ShadowConventionPlugin.kt

@@ -0,0 +1,25 @@
+import com.android.build.gradle.LibraryExtension
+import org.gradle.api.Plugin
+import org.gradle.api.Project
+import org.gradle.api.artifacts.VersionCatalogsExtension
+import org.gradle.kotlin.dsl.configure
+import org.gradle.kotlin.dsl.dependencies
+import org.gradle.kotlin.dsl.getByType
+
+class AndroidEd25519ShadowConventionPlugin : Plugin<Project> {
+    override fun apply(target: Project) {
+        with(target) {
+            extensions.configure<LibraryExtension> {
+                sourceSets.getByName("test") {
+                    java.srcDir(rootProject.file("testing/ed25519-shadow"))
+                }
+            }
+
+            val libs = extensions.getByType<VersionCatalogsExtension>().named("libs")
+
+            dependencies {
+                "testImplementation"(libs.findLibrary("eddsa").get())
+            }
+        }
+    }
+}

gradle/libs.versions.toml

@@ -313,6 +313,7 @@ grpc = ["grpc-okhttp", "grpc-kotlin", "grpc-protobuf-lite", "grpc-stub"]
 flipcash-android-library = { id = "flipcash.android.library" }
 flipcash-android-library-compose = { id = "flipcash.android.library.compose" }
 flipcash-android-feature = { id = "flipcash.android.feature" }
+flipcash-android-ed25519-shadow = { id = "flipcash.android.ed25519.shadow" }
 android-application = { id = "com.android.application", version.ref = "agp" }
 android-library = { id = "com.android.library", version.ref = "agp" }
 kotlin-android = { id = "org.jetbrains.kotlin.android", version.ref = "kotlin" }

libs/crypto/solana/build.gradle.kts

@@ -1,15 +1,12 @@
 plugins {
     alias(libs.plugins.flipcash.android.library)
+    alias(libs.plugins.flipcash.android.ed25519.shadow)
     id("com.google.devtools.ksp")
     id("dagger.hilt.android.plugin")
 }
 
 android {
     namespace = "${Gradle.codeNamespace}.vendor.solana"
-
-    sourceSets.getByName("test") {
-        java.srcDir(rootProject.file("testing/ed25519-shadow"))
-    }
 }
 
 dependencies {
@@ -36,5 +33,4 @@ dependencies {
     ksp(libs.hilt.compiler)
 
     testImplementation(kotlin("test"))
-    testImplementation(libs.eddsa)
 }

libs/encryption/mnemonic/build.gradle.kts

@@ -1,13 +1,10 @@
 plugins {
     alias(libs.plugins.flipcash.android.library)
+    alias(libs.plugins.flipcash.android.ed25519.shadow)
 }
 
 android {
     namespace = "${Gradle.codeNamespace}.encryption.mnemonic"
-
-    sourceSets.getByName("test") {
-        java.srcDir(rootProject.file("testing/ed25519-shadow"))
-    }
 }
 
 dependencies {
@@ -22,5 +19,4 @@ dependencies {
     implementation(libs.androidx.core)
 
     testImplementation(kotlin("test"))
-    testImplementation(libs.eddsa)
 }

services/opencode/build.gradle.kts

@@ -1,5 +1,6 @@
 plugins {
     alias(libs.plugins.flipcash.android.library)
+    alias(libs.plugins.flipcash.android.ed25519.shadow)
     id("com.google.devtools.ksp")
     id("dagger.hilt.android.plugin")
     id("org.jetbrains.kotlin.plugin.parcelize")
@@ -8,10 +9,6 @@ plugins {
 android {
     namespace = "${Gradle.codeNamespace}.services.opencode"
 
-    sourceSets.getByName("test") {
-        java.srcDir(rootProject.file("testing/ed25519-shadow"))
-    }
-
     defaultConfig {
         consumerProguardFiles("consumer-rules.pro")
 
@@ -97,6 +94,5 @@ dependencies {
     implementation(libs.event.bus)
 
     testImplementation(kotlin("test"))
-    testImplementation(libs.eddsa)
     testImplementation(libs.bundles.unit.testing)
 }