stack_wallet/lib/utilities/db_version_migration.dart

import 'package:flutter_secure_storage/flutter_secure_storage.dart';
import 'package:stackwallet/utilities/flutter_secure_storage_interface.dart';

class DbVersionMigrator {
  Future<void> migrate(
    int fromVersion, {
    FlutterSecureStorageInterface secureStore = const SecureStorageWrapper(
      FlutterSecureStorage(),
    ),
  }) async {
    // final wallets = await Hive.openBox('wallets');
    // final names = Map<String, String>.from((await wallets.get("names")) ?? {});
    //
    // switch (fromVersion) {
    //   case 0:
    //     // migrate each
    //     for (final entry in names.entries) {
    //       final walletId = entry.value;
    //       final walletName = entry.key;
    //
    //       // move main/test network to walletId based
    //       final network = await wallets.get("${entry.key}_network");
    //       await wallets.put("${walletId}_network", network);
    //       await wallets.delete("${walletName}_network");
    //
    //       final old = await Hive.openBox(walletName);
    //       final wallet = await Hive.openBox(walletId);
    //
    //       // notes
    //       final oldNotes = await old.get("notes");
    //       await wallet.put("notes", oldNotes);
    //       await old.delete("notes");
    //
    //       // address book
    //       final addressBook = await old.get("addressBookEntries");
    //       await wallet.put("addressBookEntries", addressBook);
    //       await old.put("addressBookEntries", null);
    //
    //       // receiveDerivations
    //       Map<String, dynamic> newReceiveDerivations = {};
    //       final receiveDerivations =
    //           Map<int, dynamic>.from(await old.get("receiveDerivations") ?? {});
    //
    //       for (int i = 0; i < receiveDerivations.length; i++) {
    //         receiveDerivations[i].remove("fingerprint");
    //         receiveDerivations[i].remove("identifier");
    //         receiveDerivations[i].remove("privateKey");
    //         newReceiveDerivations["$i"] = receiveDerivations[i];
    //       }
    //       final receiveDerivationsString = jsonEncode(newReceiveDerivations);
    //
    //       await secureStore.write(
    //           key: "${walletId}_receiveDerivations",
    //           value: receiveDerivationsString);
    //       await old.delete("receiveDerivations");
    //
    //       // changeDerivations
    //       Map<String, dynamic> newChangeDerivations = {};
    //       final changeDerivations =
    //           Map<int, dynamic>.from(await old.get("changeDerivations") ?? {});
    //
    //       for (int i = 0; i < changeDerivations.length; i++) {
    //         changeDerivations[i].remove("fingerprint");
    //         changeDerivations[i].remove("identifier");
    //         changeDerivations[i].remove("privateKey");
    //         newChangeDerivations["$i"] = changeDerivations[i];
    //       }
    //       final changeDerivationsString = jsonEncode(newChangeDerivations);
    //
    //       await secureStore.write(
    //           key: "${walletId}_changeDerivations",
    //           value: changeDerivationsString);
    //       await old.delete("changeDerivations");
    //     }
    //
    //     // finally update version
    //     await wallets.put("db_version", 1);
    //
    //     return;
    //   // not needed yet
    //   // return migrate(1);
    //
    //   // case 1:
    //   //   return migrate(2);
    //
    //   default:
    //     return;
    // }
  }
}