[wallet] Initial work for QuickJS migration.

6 files changed, 116 insertions, 54 deletions

diff --git a/wallet/.gitignore b/wallet/.gitignore
index 44ca846..5ddaed3 100644
--- a/wallet/.gitignore
+++ b/wallet/.gitignore
@@ -1,3 +1,3 @@
 /build
 /.bundle
-/src/main/assets/taler-wallet-*-*.js
+/src/main/jniLibs
\ No newline at end of file
diff --git a/wallet/build.gradle b/wallet/build.gradle
index fb897c6..76f909e 100644
--- a/wallet/build.gradle
+++ b/wallet/build.gradle
@@ -45,8 +45,8 @@ android {
 
     defaultConfig {
         applicationId "net.taler.wallet"
-        minSdkVersion 21
-        targetSdkVersion 32
+        minSdkVersion 24
+        targetSdkVersion 33
         versionCode 21
         versionName walletCoreVersion
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
@@ -54,11 +54,13 @@ android {
     }
     buildTypes {
         release {
-            minifyEnabled true
+            // FIXME: walletcore only works when this is false
+            minifyEnabled false
             proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
         }
         debug {
-            minifyEnabled minify_debug
+            // FIXME: walletcore only works when this is false
+            minifyEnabled false
             proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
         }
     }
@@ -116,7 +118,6 @@ android {
 
 dependencies {
     implementation project(":taler-kotlin-android")
-    implementation 'net.taler:akono:0.2'
 
     implementation "org.jetbrains.kotlin:kotlin-reflect:$kotlin_version"
 
@@ -160,36 +161,15 @@ dependencies {
     implementation "io.noties.markwon:ext-tables:$markwon_version"
     implementation "io.noties.markwon:recycler:$markwon_version"
 
+    // Java Native access
+    implementation "net.java.dev.jna:jna:5.13.0@aar"
+
     testImplementation "junit:junit:$junit_version"
     testImplementation 'org.json:json:20220320'
 }
 
-def walletLibraryDir = "src/main/assets"
-def walletDestFile = "${walletLibraryDir}/taler-wallet-embedded-${walletCoreVersion}.js"
-task downloadWalletLibrary(type: Download, dependsOn: preBuild) {
-    src "https://git.taler.net/wallet-core.git/plain/${walletCoreVersion}/taler-wallet-embedded.js?h=prebuilt"
-    dest walletDestFile
-    onlyIfModified true
-    overwrite false
-    doFirst {
-        new File(walletLibraryDir).mkdirs()
-        if (!file(dest).exists()) {  // delete old versions before fetching new one
-            delete fileTree(walletLibraryDir) {
-                include 'taler-wallet-embedded-*.js'
-            }
-        }
-    }
-}
-task verifyWalletLibrary(type: Verify, dependsOn: downloadWalletLibrary) {
-    src walletDestFile
-    algorithm 'SHA-256'
-    checksum walletCoreSha256
-}
-
-tasks.withType(MergeResources) {
-    inputs.dir walletLibraryDir
-    dependsOn verifyWalletLibrary
-}
+// FIXME: add download and verify tasks for .so files
+// (They should go on src/main/jniLibs/${ANDROID_ABI}/libtalerwalletcore.so)
 
 tasks.withType(org.jetbrains.kotlin.gradle.tasks.KotlinCompile).configureEach {
     kotlinOptions {
diff --git a/wallet/proguard-rules.pro b/wallet/proguard-rules.pro
index 04cb4da..f08a431 100644
--- a/wallet/proguard-rules.pro
+++ b/wallet/proguard-rules.pro
@@ -24,3 +24,6 @@
 
 #noinspection ShrinkerUnresolvedReference
 -keep class net.taler.wallet.** {*;}
+
+-keep class com.sun.jna.** {*;}
+-keep class * implements com.sun.jna.** {*;}
\ No newline at end of file
diff --git a/wallet/src/main/AndroidManifest.xml b/wallet/src/main/AndroidManifest.xml
index c40b87e..6498714 100644
--- a/wallet/src/main/AndroidManifest.xml
+++ b/wallet/src/main/AndroidManifest.xml
@@ -24,7 +24,9 @@
     <uses-permission
         android:name="android.permission.WRITE_EXTERNAL_STORAGE"
         android:maxSdkVersion="28" />
+    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
     <uses-permission android:name="android.permission.NFC" />
+    <uses-permission android:name="android.permission.INTERNET" />
 
     <uses-feature
         android:name="android.hardware.telephony"
@@ -43,8 +45,7 @@
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/AppTheme"
-        tools:ignore="GoogleAppIndexingWarning"
-        tools:targetApi="m">
+        tools:ignore="GoogleAppIndexingWarning">
 
         <activity
             android:name=".MainActivity"
diff --git a/wallet/src/main/java/net/taler/wallet/backend/TalerWalletCore.kt b/wallet/src/main/java/net/taler/wallet/backend/TalerWalletCore.kt
new file mode 100644
index 0000000..65ad58b
--- /dev/null
+++ b/wallet/src/main/java/net/taler/wallet/backend/TalerWalletCore.kt
@@ -0,0 +1,61 @@
+/*
+ * This file is part of GNU Taler
+ * (C) 2023 Taler Systems S.A.
+ *
+ * GNU Taler is free software; you can redistribute it and/or modify it under the
+ * terms of the GNU General Public License as published by the Free Software
+ * Foundation; either version 3, or (at your option) any later version.
+ *
+ * GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ * A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * GNU Taler; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
+ */
+
+/*
+ * This file is part of GNU Taler
+ * (C) 2023 Taler Systems S.A.
+ *
+ * GNU Taler is free software; you can redistribute it and/or modify it under the
+ * terms of the GNU General Public License as published by the Free Software
+ * Foundation; either version 3, or (at your option) any later version.
+ *
+ * GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ * A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * GNU Taler; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
+ */
+
+package net.taler.wallet.backend
+
+import com.sun.jna.Callback
+import com.sun.jna.Library
+import com.sun.jna.Native
+import com.sun.jna.Pointer
+
+interface TalerWalletCore: Library {
+    companion object {
+        val INSTANCE: TalerWalletCore by lazy {
+            Native.load("talerwalletcore", TalerWalletCore::class.java)
+        }
+    }
+
+    interface TALER_WALLET_MessageHandlerFn: Callback {
+        fun invoke(handler_p: Pointer, message: String)
+    }
+
+    interface TALER_LogFn: Callback {
+        fun invoke(cls: Pointer, stream: Int, msg: String)
+    }
+
+    fun TALER_WALLET_create(): Pointer
+    fun TALER_WALLET_set_message_handler(twi: Pointer, handler_f: TALER_WALLET_MessageHandlerFn, handler_p: Pointer)
+    fun TALER_WALLET_send_request(twi: Pointer, request: String): Int
+    fun TALER_WALLET_run(twi: Pointer): Int
+    fun TALER_WALLET_join(twi: Pointer)
+    fun TALER_start_redirect_std(logfn: TALER_LogFn, cls: Pointer)
+}
\ No newline at end of file
diff --git a/wallet/src/main/java/net/taler/wallet/backend/WalletBackendService.kt b/wallet/src/main/java/net/taler/wallet/backend/WalletBackendService.kt
index 06e0627..7b93a21 100644
--- a/wallet/src/main/java/net/taler/wallet/backend/WalletBackendService.kt
+++ b/wallet/src/main/java/net/taler/wallet/backend/WalletBackendService.kt
@@ -25,8 +25,7 @@ import android.os.Message
 import android.os.Messenger
 import android.os.RemoteException
 import android.util.Log
-import net.taler.akono.AkonoJni
-import net.taler.wallet.BuildConfig.WALLET_CORE_VERSION
+import com.sun.jna.Pointer
 import net.taler.wallet.HostCardEmulatorService
 import org.json.JSONObject
 import java.lang.ref.WeakReference
@@ -46,7 +45,8 @@ class WalletBackendService : Service() {
      */
     private val messenger: Messenger = Messenger(IncomingHandler(this))
 
-    private lateinit var akono: AkonoJni
+    private lateinit var walletCore: TalerWalletCore
+    private lateinit var instance: Pointer
 
     private var initialized = false
 
@@ -57,25 +57,23 @@ class WalletBackendService : Service() {
     private val subscribers = LinkedList<Messenger>()
 
     override fun onCreate() {
-        val talerWalletAndroidCode =
-            assets.open("taler-wallet-embedded-$WALLET_CORE_VERSION.js").use {
-                it.readBytes().toString(Charsets.UTF_8)
-            }
-
-
         Log.i(TAG, "onCreate in wallet backend service")
-        akono = AkonoJni()
-        akono.putModuleCode("@gnu-taler/taler-wallet-embedded", talerWalletAndroidCode)
-        akono.setMessageHandler(object : AkonoJni.MessageHandler {
-            override fun handleMessage(message: String) {
+
+        walletCore = TalerWalletCore.INSTANCE
+        instance = walletCore.TALER_WALLET_create()
+        walletCore.TALER_WALLET_set_message_handler(instance, object: TalerWalletCore.TALER_WALLET_MessageHandlerFn {
+            override fun invoke(handler_p: Pointer, message: String) {
                 this@WalletBackendService.handleAkonoMessage(message)
             }
-        })
-        //akono.evalNodeCode("require('source-map-support').install();")
-        akono.evalNodeCode("require('akono');")
-        akono.evalNodeCode("tw = require('@gnu-taler/taler-wallet-embedded');")
-        akono.evalNodeCode("tw.installNativeWalletListener();")
+        }, instance)
+        walletCore.TALER_start_redirect_std(object: TalerWalletCore.TALER_LogFn {
+            override fun invoke(cls: Pointer, stream: Int, msg: String) {
+                Log.d(TAG, "wallet log: $msg")
+            }
+        }, instance)
+        walletCore.TALER_WALLET_run(instance)
         sendInitMessage()
+        // runIntegrationTest()
         super.onCreate()
     }
 
@@ -85,7 +83,26 @@ class WalletBackendService : Service() {
         val args = JSONObject()
         msg.put("args", args)
         args.put("persistentStoragePath", "${application.filesDir}/$WALLET_DB")
-        akono.sendMessage(msg.toString())
+        Log.d(TAG, "init message: ${msg.toString(2)}")
+        walletCore.TALER_WALLET_send_request(instance, msg.toString())
+    }
+
+    /**
+     * Run the integration tests for wallet-core.
+     */
+    private fun runIntegrationTest() {
+        val msg = JSONObject()
+        msg.put("operation", "runIntegrationTest")
+        val args = JSONObject()
+        msg.put("args", args)
+        args.put("amountToWithdraw", "KUDOS:3")
+        args.put("amountToSpend", "KUDOS:1")
+        args.put("bankBaseUrl", "https://bank.demo.taler.net/demobanks/default/access-api/")
+        args.put("exchangeBaseUrl", "https://exchange.demo.taler.net/")
+        args.put("merchantBaseUrl", "https://backend.demo.taler.net/")
+        args.put("merchantAuthToken", "secret-token:sandbox")
+        Log.d(TAG, "integration test message: ${msg.toString(2)}")
+        walletCore.TALER_WALLET_send_request(instance, msg.toString())
     }
 
     /**
@@ -125,7 +142,7 @@ class WalletBackendService : Service() {
                     request.put("operation", operation)
                     request.put("id", serviceRequestID)
                     request.put("args", argsObj)
-                    svc.akono.sendMessage(request.toString(2))
+                    svc.walletCore.TALER_WALLET_send_request(svc.instance, request.toString(2))
                     Log.i(
                         TAG,
                         "mapping service request ID $serviceRequestID to client request ID $clientRequestID"