Add the ability to import/export channel.db

Author: hsjoberg

android/app/src/main/java/com/blixtwallet/LndMobileTools.java

@@ -7,6 +7,7 @@
 import android.Manifest;
 import android.app.ActivityManager;
 import android.database.sqlite.SQLiteDatabase;
+import android.net.Uri;
 import android.os.FileObserver;
 import android.os.Process;
 import android.util.Base64;
@@ -765,6 +766,56 @@ public void generateSecureRandomAsBase64(int length, Promise promise) {
     promise.resolve(Base64.encodeToString(buffer, Base64.NO_WRAP));
   }
 
+  @ReactMethod
+  public void saveChannelDbFile(Promise promise) {
+    // This promise will be resolved in MainActivity
+    MainActivity.tmpExportChannelDbPromise = promise;
+    Intent intent = new Intent(Intent.ACTION_CREATE_DOCUMENT);
+    intent.addCategory(Intent.CATEGORY_OPENABLE);
+    intent.setType("application/octet-stream");
+    intent.putExtra(Intent.EXTRA_TITLE, "channel.db");
+    getReactApplicationContext().getCurrentActivity().startActivityForResult(intent, MainActivity.INTENT_EXPORTCHANNELDBFILE);
+  }
+
+  @ReactMethod
+  public void importChannelDbFile(String channelDbImportPath, Promise promise) {
+    Log.i(TAG, getReactApplicationContext().getFilesDir().toString() + "/data/graph/" + BuildConfig.CHAIN + "/channel.db");
+    try {
+      File sourceFile = new File(channelDbImportPath);
+
+      String channelDbFilePath = getReactApplicationContext().getFilesDir().toString() + "/data/graph/" + BuildConfig.CHAIN + "/channel.db";
+      File destChannelDbFile = new File(channelDbFilePath);
+
+      // Delete the channel.db file first if there is one
+      destChannelDbFile.delete();
+
+      File destFile = new File(channelDbFilePath);
+      if (!destFile.exists() && !destFile.createNewFile()) {
+        promise.reject(new IOException("Failed to create destination channel.db file"));
+        return;
+      }
+
+      // Copy content
+      InputStream in = new FileInputStream(sourceFile);
+      OutputStream out = new FileOutputStream(destFile);
+      byte[] buffer = new byte[1024];
+      int read;
+      while ((read = in.read(buffer)) != -1) {
+        out.write(buffer, 0, read);
+      }
+      in.close();
+      out.flush();
+      out.close();
+
+      // Delete the cached file
+      sourceFile.delete();
+
+      promise.resolve(true);
+    } catch (IOException error) {
+      promise.reject(error);
+    }
+  }
+
   private void checkWriteExternalStoragePermission(@NonNull RequestWriteExternalStoragePermissionCallback successCallback,
                                                    @NonNull Runnable failCallback,
                                                    @NonNull Runnable failPermissionCheckcallback) {

android/app/src/main/java/com/blixtwallet/MainActivity.kt

@@ -5,6 +5,7 @@ import android.os.Bundle
 import android.widget.Toast
 import com.facebook.react.ReactActivity
 import com.facebook.react.ReactActivityDelegate
+import com.facebook.react.bridge.Promise
 import com.facebook.react.defaults.DefaultNewArchitectureEntryPoint.fabricEnabled
 import com.facebook.react.defaults.DefaultReactActivityDelegate
 import dev.doubledot.doki.ui.DokiActivity
@@ -92,6 +93,29 @@ class MainActivity : ReactActivity() {
             } catch (e: IOException) {
                 Toast.makeText(this, "Error " + e.message, Toast.LENGTH_LONG).show()
             }
+        } else if (requestCode == INTENT_EXPORTCHANNELDBFILE && resultCode == RESULT_OK) {
+            val destUri = data!!.data
+            val sourceLocation = File(filesDir.toString() + "/data/graph/" + BuildConfig.CHAIN + "/channel.db")
+            try {
+                val `in`: InputStream = FileInputStream(sourceLocation)
+                val out = contentResolver.openOutputStream(destUri!!)
+                val buf = ByteArray(1024)
+                var len: Int
+                while (`in`.read(buf).also { len = it } > 0) {
+                    out!!.write(buf, 0, len)
+                }
+                `in`.close()
+                out!!.close()
+
+                if (tmpExportChannelDbPromise != null) {
+                    tmpExportChannelDbPromise!!.resolve(true)
+                } else {
+                    Toast.makeText(this, "promise is null", Toast.LENGTH_LONG).show()
+                }
+            } catch (e: IOException) {
+                Toast.makeText(this, "Error " + e.message, Toast.LENGTH_LONG).show()
+                tmpExportChannelDbPromise!!.reject(e)
+            }
         }
     }
 
@@ -111,14 +135,19 @@ class MainActivity : ReactActivity() {
         @JvmField
         var INTENT_EXPORTCHANBACKUP = 101
         @JvmField
+        var tmpChanBackup: ByteArray = ByteArray(0)
+        @JvmField
         var INTENT_EXPORTCHANBACKUPFILE = 102
         @JvmField
         var INTENT_COPYSPEEDLOADERLOG = 103
         @JvmField
-        var tmpChanBackup: ByteArray = ByteArray(0)
+        var INTENT_EXPORTCHANNELDBFILE = 104
+        @JvmField
+        var tmpExportChannelDbPromise: Promise? = null
+        @JvmField
         var currentActivity: WeakReference<MainActivity>? = null
         @JvmStatic
         val activity: MainActivity?
             get() = currentActivity!!.get()
     }
-}
+}

ios/LndMobile/Lnd.swift

@@ -122,6 +122,7 @@ open class Lnd {
     "VerifyMessage": { bytes, cb in LndmobileVerifyMessage(bytes, cb) },
     "SignMessage": { bytes, cb in LndmobileSignMessage(bytes, cb) },
     "SignerSignMessage": { bytes, cb in LndmobileSignerSignMessage(bytes, cb) },
+    "RestoreChannelBackups": { bytes, cb in LndmobileRestoreChannelBackups(bytes, cb) },
 
     // autopilot
     "AutopilotStatus": { bytes, cb in LndmobileAutopilotStatus(bytes, cb) },

src/Main.tsx

@@ -1,6 +1,6 @@
 import React, { useEffect, useState } from "react";
 import { StatusBar, Alert, NativeModules } from "react-native";
-import { Spinner, H1, H2 } from "native-base";
+import { Spinner, H1, H2, Text } from "native-base";
 import {
   createStackNavigator,
   CardStyleInterpolators,
@@ -40,6 +40,7 @@ import useStackNavigationOptions from "./hooks/useStackNavigationOptions";
 import { navigator } from "./utils/navigation";
 import { PLATFORM } from "./utils/constants";
 import Prompt, { IPromptNavigationProps } from "./windows/HelperWindows/Prompt";
+import { isInstanceBricked } from "./storage/app";
 
 const RootStack = createStackNavigator();
 
@@ -86,6 +87,7 @@ export default function Main() {
   const appReady = useStoreState((store) => store.appReady);
   const lightningReady = useStoreState((store) => store.lightning.ready);
   const walletCreated = useStoreState((store) => store.walletCreated);
+  const importChannelDbOnStartup = useStoreState((store) => store.importChannelDbOnStartup);
   const loggedIn = useStoreState((store) => store.security.loggedIn);
   const initializeApp = useStoreActions((store) => store.initializeApp);
   const [initialRoute, setInitialRoute] = useState("Loading");
@@ -95,13 +97,22 @@ export default function Main() {
     (store) => store.settings.screenTransitionsEnabled,
   );
 
-  const [state, setState] = useState<"init" | "authentication" | "onboarding" | "started">("init");
+  console.log("walletCreated", walletCreated);
+
+  const [state, setState] = useState<
+    "init" | "authentication" | "onboarding" | "started" | "bricked"
+  >("init");
 
   useEffect(() => {
     // tslint:disable-next-line
     (async () => {
       if (!appReady) {
         try {
+          if (await isInstanceBricked()) {
+            setState("bricked");
+            return;
+          }
+
           await initializeApp();
         } catch (e) {
           toast(e.message, 0, "danger");
@@ -120,7 +131,7 @@ export default function Main() {
         setState("authentication");
       } else if (!lightningReady) {
         setState("started");
-        if (!walletCreated) {
+        if (!walletCreated && !importChannelDbOnStartup) {
           setInitialRoute("Welcome");
         } else {
           // try {
@@ -225,6 +236,10 @@ export default function Main() {
     return <Authentication />;
   }
 
+  if (state === "bricked") {
+    return <Text>Bricked</Text>;
+  }
+
   return (
     <RootStack.Navigator initialRouteName={initialRoute} screenOptions={screenOptions}>
       <RootStack.Screen

src/lndmobile/LndMobile.d.ts

@@ -54,6 +54,8 @@ export interface ILndMobileTools {
   DEBUG_deleteSpeedloaderDgraphDirectory(): null;
   DEBUG_deleteNeutrinoFiles(): boolean;
   getInternalFiles(): Promise<Record<string, number>>;
+  saveChannelDbFile(): Promise<boolean>;
+  importChannelDbFile(channelDbPath: string): Promise<boolean>;
 
   // Android-specific
   getIntentStringData(): Promise<string | null>;