Address book android auto backup (#1641)

* Address book android auto backup

* Documentation update

* Address book container folder added

* Address book general error handling

* Address book memory storage hotfix

* Documentation update

---------

Co-authored-by: Honza <rychnovsky.honza@gmail.com>

CHANGELOG.md

@@ -8,6 +8,7 @@ and this application adheres to [Semantic Versioning](https://semver.org/spec/v2
 
 ### Added
 - Address book encryption
+- Android auto backup support for address book encryption
 - The device authentication feature on the Zashi app launch has been added
 - Zashi app now supports Spanish language. It can be changed in the System settings options.
 - The Flexa SDK has been adopted to enable payments using the embedded Flexa UI

app/src/main/AndroidManifest.xml

@@ -4,7 +4,10 @@
 
     <application
         android:name="co.electriccoin.zcash.app.ZcashApplication"
-        android:allowBackup="false"
+        android:allowBackup="true"
+        android:fullBackupContent="@xml/auto_backup_config"
+        android:dataExtractionRules="@xml/auto_backup_config_android_12"
+        android:backupInForeground="true"
         android:icon="@mipmap/ic_launcher_square"
         android:roundIcon="@mipmap/ic_launcher_round"
         android:localeConfig="@xml/locales_config"

app/src/main/res/xml/auto_backup_config.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<full-backup-content>
+    <include
+        domain="file"
+        path="address_book/." />
+</full-backup-content>

app/src/main/res/xml/auto_backup_config_android_12.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<data-extraction-rules>
+    <cloud-backup disableIfNoEncryptionCapabilities="false">
+        <include
+            domain="file"
+            path="address_book/." />
+    </cloud-backup>
+</data-extraction-rules>

app/src/zcashmainnetDebug/AndroidManifest.xml

@@ -4,7 +4,6 @@
 
     <application
         android:name="co.electriccoin.zcash.app.ZcashApplication"
-        android:allowBackup="false"
         android:icon="@mipmap/ic_launcher_square"
         android:roundIcon="@mipmap/ic_launcher_round"
         android:label="@string/app_name">

app/src/zcashtestnet/AndroidManifest.xml

@@ -4,7 +4,6 @@
 
     <application
         android:name="co.electriccoin.zcash.app.ZcashApplication"
-        android:allowBackup="false"
         android:icon="@mipmap/ic_launcher_square"
         android:roundIcon="@mipmap/ic_launcher_round"
         android:label="@string/app_name">

app/src/zcashtestnetDebug/AndroidManifest.xml

@@ -4,7 +4,6 @@
 
     <application
         android:name="co.electriccoin.zcash.app.ZcashApplication"
-        android:allowBackup="false"
         android:icon="@mipmap/ic_launcher_square"
         android:roundIcon="@mipmap/ic_launcher_round"
         android:label="@string/app_name">

docs/README.md

@@ -1,4 +1,9 @@
 # Documentation
 
-Here you'll find documentation
+# Android auto backup testing
-TBD
+
+To force the android system back up the app use the following commands:
+```
+    adb shell bmgr enable true
+    adb shell bmgr backupnow co.electriccoin.zcash.debug
+```

docs/whatsNew/WHATS_NEW_EN.md

@@ -11,6 +11,7 @@ directly impact users rather than highlighting other key architectural updates.*
 
 ### Added
 - Address book encryption
+- Android auto backup support for address book encryption
 - The device authentication feature on the Zashi app launch has been added
 - Zashi app now supports Spanish language. It can be changed in the System settings options.
 - The Flexa SDK has been adopted to enable payments using the embedded Flexa UI

docs/whatsNew/WHATS_NEW_ES.md

@@ -11,6 +11,7 @@ directly impact users rather than highlighting other key architectural updates.*
 
 ### Added
 - Address book encryption
+- Android auto backup support for address book encryption
 - The device authentication feature on the Zashi app launch has been added
 - Zashi app now supports Spanish language. It can be changed in the System settings options.
 - The Flexa SDK has been adopted to enable payments using the embedded Flexa UI

ui-lib/src/main/java/co/electriccoin/zcash/ui/common/datasource/LocalAddressBookDataSource.kt

@@ -11,8 +11,6 @@ import co.electriccoin.zcash.ui.common.serialization.addressbook.AddressBookKey
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.withContext
 import kotlinx.datetime.Clock
-import java.io.IOException
-import java.security.GeneralSecurityException
 
 interface LocalAddressBookDataSource {
     suspend fun getContacts(addressBookKey: AddressBookKey): AddressBook
@@ -61,7 +59,9 @@ class LocalAddressBookDataSourceImpl(
                             lastUpdated = Clock.System.now(),
                             version = ADDRESS_BOOK_SERIALIZATION_V1,
                             contacts = emptyList(),
-                        )
+                        ).also {
+                            this@LocalAddressBookDataSourceImpl.addressBook = it
+                        }
                     writeAddressBookToLocalStorage(newAddressBook, addressBookKey)
                 }
                 newAddressBook
@@ -88,7 +88,9 @@ class LocalAddressBookDataSourceImpl(
                                 address = address,
                                 lastUpdated = lastUpdated,
                             ),
-                )
+                ).also {
+                    addressBook = it
+                }
             writeAddressBookToLocalStorage(newAddressBook, addressBookKey)
             newAddressBook
         }
@@ -118,7 +120,9 @@ class LocalAddressBookDataSourceImpl(
                                 )
                             }
                             .toList(),
-                )
+                ).also {
+                    addressBook = it
+                }
             writeAddressBookToLocalStorage(newAddressBook, addressBookKey)
             newAddressBook
         }
@@ -139,7 +143,9 @@ class LocalAddressBookDataSourceImpl(
                                 remove(addressBookContact)
                             }
                             .toList(),
-                )
+                ).also {
+                    addressBook = it
+                }
             writeAddressBookToLocalStorage(newAddressBook, addressBookKey)
             newAddressBook
         }
@@ -158,22 +164,15 @@ class LocalAddressBookDataSourceImpl(
 
     @Suppress("ReturnCount")
     private suspend fun readLocalFileToAddressBook(addressBookKey: AddressBookKey): AddressBook? {
-        val encryptedFile = addressBookStorageProvider.getStorageFile(addressBookKey)
+        val encryptedFile = runCatching { addressBookStorageProvider.getStorageFile(addressBookKey) }.getOrNull()
-        val unencryptedFile = addressBookStorageProvider.getLegacyUnencryptedStorageFile()
+        val unencryptedFile = runCatching { addressBookStorageProvider.getLegacyUnencryptedStorageFile() }.getOrNull()
 
         if (encryptedFile != null) {
-            return try {
+            return runCatching {
-                addressBookProvider.readAddressBookFromFile(encryptedFile, addressBookKey)
+                addressBookProvider
-                    .also {
+                    .readAddressBookFromFile(encryptedFile, addressBookKey)
-                        unencryptedFile?.deleteSuspend()
+                    .also { unencryptedFile?.deleteSuspend() }
-                    }
+            }.onFailure { e -> Twig.warn(e) { "Failed to decrypt address book" } }.getOrNull()
-            } catch (e: GeneralSecurityException) {
-                Twig.warn(e) { "Failed to decrypt address book" }
-                null
-            } catch (e: IOException) {
-                Twig.warn(e) { "Failed to decrypt address book" }
-                null
-            }
         }
 
         return if (unencryptedFile != null) {
@@ -191,7 +190,9 @@ class LocalAddressBookDataSourceImpl(
         addressBook: AddressBook,
         addressBookKey: AddressBookKey
     ) {
-        val file = addressBookStorageProvider.getOrCreateStorageFile(addressBookKey)
+        runCatching {
-        addressBookProvider.writeAddressBookToFile(file, addressBook, addressBookKey)
+            val file = addressBookStorageProvider.getOrCreateStorageFile(addressBookKey)
+            addressBookProvider.writeAddressBookToFile(file, addressBook, addressBookKey)
+        }.onFailure { e -> Twig.warn(e) { "Failed to write address book" } }
     }
 }

ui-lib/src/main/java/co/electriccoin/zcash/ui/common/provider/AddressBookStorageProvider.kt

@@ -11,17 +11,17 @@ interface AddressBookStorageProvider {
 
     fun getOrCreateStorageFile(addressBookKey: AddressBookKey): File
 
-    /**
+    // /**
-     * Create a temporary file into which data from remote is written. This file is removed after usage.
+    //  * Create a temporary file into which data from remote is written. This file is removed after usage.
-     */
+    //  */
-    fun getOrCreateTempStorageFile(): File
+    // fun getOrCreateTempStorageFile(): File
 }
 
 class AddressBookStorageProviderImpl(
     private val context: Context
 ) : AddressBookStorageProvider {
     override fun getStorageFile(addressBookKey: AddressBookKey): File? {
-        return File(context.noBackupFilesDir, addressBookKey.fileIdentifier())
+        return File(getOrCreateAddressBookDir(), addressBookKey.fileIdentifier())
             .takeIf { it.exists() && it.isFile }
     }
 
@@ -31,19 +31,30 @@ class AddressBookStorageProviderImpl(
     }
 
     override fun getOrCreateStorageFile(addressBookKey: AddressBookKey): File {
-        return getOrCreateFile(addressBookKey.fileIdentifier())
+        val file = File(getOrCreateAddressBookDir(), addressBookKey.fileIdentifier())
-    }
-
-    override fun getOrCreateTempStorageFile(): File = getOrCreateFile(REMOTE_ADDRESS_BOOK_FILE_NAME_LOCAL_COPY)
-
-    private fun getOrCreateFile(name: String): File {
-        val file = File(context.noBackupFilesDir, name)
         if (!file.exists()) {
             file.createNewFile()
         }
         return file
     }
+
+    // override fun getOrCreateTempStorageFile(): File {
+    //     val file = File(context.noBackupFilesDir, REMOTE_ADDRESS_BOOK_FILE_NAME_LOCAL_COPY)
+    //     if (!file.exists()) {
+    //         file.createNewFile()
+    //     }
+    //     return file
+    // }
+
+    private fun getOrCreateAddressBookDir(): File {
+        val filesDir = context.filesDir
+        val addressBookDir = File(filesDir, "address_book")
+        if (!addressBookDir.exists()) {
+            addressBookDir.mkdir()
+        }
+        return addressBookDir
+    }
 }
 
 private const val LEGACY_UNENCRYPTED_ADDRESS_BOOK_FILE_NAME = "address_book"
-private const val REMOTE_ADDRESS_BOOK_FILE_NAME_LOCAL_COPY = "address_book_temp"
+// private const val REMOTE_ADDRESS_BOOK_FILE_NAME_LOCAL_COPY = "address_book_temp"