verify module.prop

service/build.gradle.kts

@@ -1,10 +1,33 @@
 import android.databinding.tool.ext.capitalizeUS
+import org.jetbrains.kotlin.daemon.common.toHexString
+import java.security.MessageDigest
 
 plugins {
     alias(libs.plugins.jetbrains.kotlin.android)
     alias(libs.plugins.agp.app)
 }
 
+val moduleId: String by rootProject.extra
+val moduleName: String by rootProject.extra
+val verCode: Int by rootProject.extra
+val verName: String by rootProject.extra
+val commitHash: String by rootProject.extra
+val author: String by rootProject.extra
+val description: String by rootProject.extra
+val moduleDescription = description
+
+fun calculateChecksum(variantLowered: String): String {
+    return MessageDigest.getInstance("SHA-256").run {
+        update(moduleId.toByteArray(Charsets.UTF_8))
+        update(moduleName.toByteArray(Charsets.UTF_8))
+        update("$verName ($verCode-$commitHash-$variantLowered)".toByteArray(Charsets.UTF_8))
+        update(verCode.toString().toByteArray(Charsets.UTF_8))
+        update(author.toByteArray(Charsets.UTF_8))
+        update(description.toByteArray(Charsets.UTF_8))
+        digest().toHexString()
+    }
+}
+
 android {
     namespace = "io.github.a13e300.tricky_store"
     compileSdk = 34
@@ -22,6 +45,10 @@ android {
                 "proguard-rules.pro"
             )
         }
+        forEach {
+            val checksum = calculateChecksum(it.name)
+            it.buildConfigField("String", "CHECKSUM", "\"$checksum\"")
+        }
     }
 
     kotlinOptions {
@@ -44,6 +71,11 @@ android {
         checkReleaseBuilds = false
         abortOnError = true
     }
+
+    buildFeatures {
+        buildConfig = true
+    }
+
 }
 
 dependencies {