mirror of
https://github.com/cypherstack/stack_wallet.git
synced 2024-12-24 12:29:37 +00:00
545 lines
17 KiB
Dart
545 lines
17 KiB
Dart
import 'dart:async';
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import 'package:isar/isar.dart';
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import 'package:meta/meta.dart';
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import 'package:mutex/mutex.dart';
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import 'package:stackwallet/db/isar/main_db.dart';
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import 'package:stackwallet/models/isar/models/blockchain_data/address.dart';
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import 'package:stackwallet/models/node_model.dart';
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import 'package:stackwallet/models/paymint/fee_object_model.dart';
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import 'package:stackwallet/services/event_bus/events/global/node_connection_status_changed_event.dart';
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import 'package:stackwallet/services/event_bus/events/global/refresh_percent_changed_event.dart';
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import 'package:stackwallet/services/event_bus/events/global/wallet_sync_status_changed_event.dart';
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import 'package:stackwallet/services/event_bus/global_event_bus.dart';
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import 'package:stackwallet/services/node_service.dart';
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import 'package:stackwallet/utilities/amount/amount.dart';
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import 'package:stackwallet/utilities/constants.dart';
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import 'package:stackwallet/utilities/default_nodes.dart';
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import 'package:stackwallet/utilities/enums/coin_enum.dart';
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import 'package:stackwallet/utilities/flutter_secure_storage_interface.dart';
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import 'package:stackwallet/utilities/logger.dart';
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import 'package:stackwallet/utilities/prefs.dart';
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import 'package:stackwallet/wallets/crypto_currency/crypto_currency.dart';
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import 'package:stackwallet/wallets/isar/models/wallet_info.dart';
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import 'package:stackwallet/wallets/models/tx_data.dart';
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import 'package:stackwallet/wallets/wallet/impl/banano_wallet.dart';
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import 'package:stackwallet/wallets/wallet/impl/bitcoin_wallet.dart';
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import 'package:stackwallet/wallets/wallet/impl/bitcoincash_wallet.dart';
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import 'package:stackwallet/wallets/wallet/impl/dogecoin_wallet.dart';
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import 'package:stackwallet/wallets/wallet/impl/ecash_wallet.dart';
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import 'package:stackwallet/wallets/wallet/impl/epiccash_wallet.dart';
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import 'package:stackwallet/wallets/wallet/impl/firo_wallet.dart';
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import 'package:stackwallet/wallets/wallet/impl/nano_wallet.dart';
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import 'package:stackwallet/wallets/wallet/impl/tezos_wallet.dart';
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import 'package:stackwallet/wallets/wallet/impl/wownero_wallet.dart';
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import 'package:stackwallet/wallets/wallet/private_key_based_wallet.dart';
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import 'package:stackwallet/wallets/wallet/wallet_mixin_interfaces/electrumx_interface.dart';
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import 'package:stackwallet/wallets/wallet/wallet_mixin_interfaces/lelantus_interface.dart';
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import 'package:stackwallet/wallets/wallet/wallet_mixin_interfaces/mnemonic_interface.dart';
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import 'package:stackwallet/wallets/wallet/wallet_mixin_interfaces/multi_address_interface.dart';
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abstract class Wallet<T extends CryptoCurrency> {
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// default to Transaction class. For TransactionV2 set to 2
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int get isarTransactionVersion => 1;
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Wallet(this.cryptoCurrency);
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//============================================================================
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// ========== Properties =====================================================
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final T cryptoCurrency;
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late final MainDB mainDB;
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late final SecureStorageInterface secureStorageInterface;
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late final NodeService nodeService;
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late final Prefs prefs;
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final refreshMutex = Mutex();
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WalletInfo get info => _walletInfo;
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bool get isConnected => _isConnected;
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bool get shouldAutoSync => _shouldAutoSync;
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set shouldAutoSync(bool shouldAutoSync) {
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if (_shouldAutoSync != shouldAutoSync) {
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_shouldAutoSync = shouldAutoSync;
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if (!shouldAutoSync) {
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_periodicRefreshTimer?.cancel();
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_periodicRefreshTimer = null;
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_stopNetworkAlivePinging();
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} else {
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_startNetworkAlivePinging();
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refresh();
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}
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}
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}
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// ===== private properties ===========================================
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late WalletInfo _walletInfo;
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late final Stream<WalletInfo?> _walletInfoStream;
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Timer? _periodicRefreshTimer;
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Timer? _networkAliveTimer;
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bool _shouldAutoSync = false;
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bool _isConnected = false;
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void xmrAndWowSyncSpecificFunctionThatShouldBeGottenRidOfInTheFuture(
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bool flag) {
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_isConnected = flag;
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}
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//============================================================================
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// ========== Wallet Info Convenience Getters ================================
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String get walletId => info.walletId;
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/// Attempt to fetch the most recent chain height.
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/// On failure return the last cached height.
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Future<int> get chainHeight async {
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try {
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// attempt updating the walletInfo's cached height
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await updateChainHeight();
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} catch (e, s) {
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// do nothing on failure (besides logging)
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Logging.instance.log("$e\n$s", level: LogLevel.Warning);
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}
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// return regardless of whether it was updated or not as we want a
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// number even if it isn't the most recent
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return info.cachedChainHeight;
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}
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//============================================================================
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// ========== Static Main ====================================================
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/// Create a new wallet and save [walletInfo] to db.
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static Future<Wallet> create({
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required WalletInfo walletInfo,
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required MainDB mainDB,
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required SecureStorageInterface secureStorageInterface,
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required NodeService nodeService,
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required Prefs prefs,
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String? mnemonic,
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String? mnemonicPassphrase,
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String? privateKey,
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}) async {
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final Wallet wallet = await _construct(
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walletInfo: walletInfo,
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mainDB: mainDB,
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secureStorageInterface: secureStorageInterface,
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nodeService: nodeService,
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prefs: prefs,
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);
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if (wallet is MnemonicInterface) {
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await secureStorageInterface.write(
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key: mnemonicKey(walletId: walletInfo.walletId),
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value: mnemonic!,
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);
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await secureStorageInterface.write(
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key: mnemonicPassphraseKey(walletId: walletInfo.walletId),
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value: mnemonicPassphrase!,
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);
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}
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if (wallet is PrivateKeyBasedWallet) {
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await secureStorageInterface.write(
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key: privateKeyKey(walletId: walletInfo.walletId),
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value: privateKey!,
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);
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}
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// Store in db after wallet creation
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await wallet.mainDB.isar.writeTxn(() async {
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await wallet.mainDB.isar.walletInfo.put(wallet.info);
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});
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return wallet;
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}
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/// Load an existing wallet via [WalletInfo] using [walletId].
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static Future<Wallet> load({
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required String walletId,
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required MainDB mainDB,
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required SecureStorageInterface secureStorageInterface,
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required NodeService nodeService,
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required Prefs prefs,
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}) async {
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final walletInfo = await mainDB.isar.walletInfo
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.where()
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.walletIdEqualTo(walletId)
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.findFirst();
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if (walletInfo == null) {
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throw Exception(
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"WalletInfo not found for $walletId when trying to call Wallet.load()",
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);
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}
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return await _construct(
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walletInfo: walletInfo,
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mainDB: mainDB,
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secureStorageInterface: secureStorageInterface,
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nodeService: nodeService,
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prefs: prefs,
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);
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}
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//============================================================================
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// ========== Static Util ====================================================
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// secure storage key
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static String mnemonicKey({
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required String walletId,
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}) =>
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"${walletId}_mnemonic";
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// secure storage key
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static String mnemonicPassphraseKey({
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required String walletId,
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}) =>
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"${walletId}_mnemonicPassphrase";
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// secure storage key
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static String privateKeyKey({
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required String walletId,
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}) =>
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"${walletId}_privateKey";
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//============================================================================
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// ========== Private ========================================================
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/// Construct wallet instance by [WalletType] from [walletInfo]
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static Future<Wallet> _construct({
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required WalletInfo walletInfo,
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required MainDB mainDB,
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required SecureStorageInterface secureStorageInterface,
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required NodeService nodeService,
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required Prefs prefs,
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}) async {
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final Wallet wallet = _loadWallet(
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walletInfo: walletInfo,
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);
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wallet.prefs = prefs;
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wallet.nodeService = nodeService;
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if (wallet is ElectrumXInterface) {
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// initialize electrumx instance
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await wallet.updateNode();
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}
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return wallet
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..secureStorageInterface = secureStorageInterface
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..mainDB = mainDB
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.._walletInfo = walletInfo
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.._watchWalletInfo();
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}
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static Wallet _loadWallet({
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required WalletInfo walletInfo,
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}) {
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switch (walletInfo.coin) {
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case Coin.banano:
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return BananoWallet(CryptoCurrencyNetwork.main);
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case Coin.bitcoin:
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return BitcoinWallet(CryptoCurrencyNetwork.main);
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case Coin.bitcoinTestNet:
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return BitcoinWallet(CryptoCurrencyNetwork.test);
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case Coin.bitcoincash:
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return BitcoincashWallet(CryptoCurrencyNetwork.main);
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case Coin.bitcoincashTestnet:
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return BitcoincashWallet(CryptoCurrencyNetwork.test);
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case Coin.dogecoin:
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return DogecoinWallet(CryptoCurrencyNetwork.main);
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case Coin.dogecoinTestNet:
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return DogecoinWallet(CryptoCurrencyNetwork.test);
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case Coin.eCash:
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return EcashWallet(CryptoCurrencyNetwork.main);
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case Coin.epicCash:
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return EpiccashWallet(CryptoCurrencyNetwork.main);
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case Coin.firo:
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return FiroWallet(CryptoCurrencyNetwork.main);
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case Coin.firoTestNet:
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return FiroWallet(CryptoCurrencyNetwork.main);
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case Coin.nano:
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return NanoWallet(CryptoCurrencyNetwork.main);
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case Coin.tezos:
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return TezosWallet(CryptoCurrencyNetwork.main);
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case Coin.wownero:
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return WowneroWallet(CryptoCurrencyNetwork.main);
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default:
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// should never hit in reality
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throw Exception("Unknown crypto currency: ${walletInfo.coin}");
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}
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}
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// listen to changes in db and updated wallet info property as required
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void _watchWalletInfo() {
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_walletInfoStream = mainDB.isar.walletInfo.watchObject(
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_walletInfo.id,
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fireImmediately: true,
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);
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_walletInfoStream.forEach((element) {
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if (element != null) {
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_walletInfo = element;
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}
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});
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}
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void _startNetworkAlivePinging() {
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// call once on start right away
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_periodicPingCheck();
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// then periodically check
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_networkAliveTimer = Timer.periodic(
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Constants.networkAliveTimerDuration,
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(_) async {
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_periodicPingCheck();
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},
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);
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}
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void _periodicPingCheck() async {
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bool hasNetwork = await pingCheck();
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if (_isConnected != hasNetwork) {
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NodeConnectionStatus status = hasNetwork
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? NodeConnectionStatus.connected
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: NodeConnectionStatus.disconnected;
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GlobalEventBus.instance.fire(
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NodeConnectionStatusChangedEvent(
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status,
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walletId,
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cryptoCurrency.coin,
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),
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);
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_isConnected = hasNetwork;
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if (hasNetwork) {
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unawaited(refresh());
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}
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}
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}
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void _stopNetworkAlivePinging() {
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_networkAliveTimer?.cancel();
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_networkAliveTimer = null;
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}
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//============================================================================
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// ========== Must override ==================================================
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/// Create and sign a transaction in preparation to submit to network
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Future<TxData> prepareSend({required TxData txData});
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/// Broadcast transaction to network. On success update local wallet state to
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/// reflect updated balance, transactions, utxos, etc.
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Future<TxData> confirmSend({required TxData txData});
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/// Recover a wallet by scanning the blockchain. If called on a new wallet a
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/// normal recovery should occur. When called on an existing wallet and
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/// [isRescan] is false then it should throw. Otherwise this function should
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/// delete all locally stored blockchain data and refetch it.
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Future<void> recover({required bool isRescan});
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Future<void> updateNode();
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Future<void> updateTransactions();
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Future<void> updateUTXOs();
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Future<void> updateBalance();
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/// updates the wallet info's cachedChainHeight
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Future<void> updateChainHeight();
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Future<Amount> estimateFeeFor(Amount amount, int feeRate);
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Future<FeeObject> get fees;
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Future<bool> pingCheck();
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//===========================================
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NodeModel getCurrentNode() {
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final node = nodeService.getPrimaryNodeFor(coin: cryptoCurrency.coin) ??
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DefaultNodes.getNodeFor(cryptoCurrency.coin);
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return node;
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}
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// Should fire events
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Future<void> refresh() async {
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// Awaiting this lock could be dangerous.
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// Since refresh is periodic (generally)
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if (refreshMutex.isLocked) {
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return;
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}
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try {
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// this acquire should be almost instant due to above check.
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// Slight possibility of race but should be irrelevant
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await refreshMutex.acquire();
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GlobalEventBus.instance.fire(
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WalletSyncStatusChangedEvent(
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WalletSyncStatus.syncing,
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walletId,
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cryptoCurrency.coin,
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),
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);
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GlobalEventBus.instance.fire(RefreshPercentChangedEvent(0.0, walletId));
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await updateChainHeight();
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GlobalEventBus.instance.fire(RefreshPercentChangedEvent(0.1, walletId));
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// TODO: [prio=low] handle this differently. Extra modification of this file for coin specific functionality should be avoided.
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if (this is MultiAddressInterface) {
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await (this as MultiAddressInterface)
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.checkReceivingAddressForTransactions();
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}
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GlobalEventBus.instance.fire(RefreshPercentChangedEvent(0.2, walletId));
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// TODO: [prio=low] handle this differently. Extra modification of this file for coin specific functionality should be avoided.
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if (this is MultiAddressInterface) {
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await (this as MultiAddressInterface)
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.checkChangeAddressForTransactions();
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}
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GlobalEventBus.instance.fire(RefreshPercentChangedEvent(0.3, walletId));
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GlobalEventBus.instance.fire(RefreshPercentChangedEvent(0.50, walletId));
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final fetchFuture = updateTransactions();
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final utxosRefreshFuture = updateUTXOs();
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// if (currentHeight != storedHeight) {
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GlobalEventBus.instance.fire(RefreshPercentChangedEvent(0.60, walletId));
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await utxosRefreshFuture;
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GlobalEventBus.instance.fire(RefreshPercentChangedEvent(0.70, walletId));
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await fetchFuture;
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GlobalEventBus.instance.fire(RefreshPercentChangedEvent(0.80, walletId));
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// await getAllTxsToWatch();
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// TODO: [prio=low] handle this differently. Extra modification of this file for coin specific functionality should be avoided.
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if (this is LelantusInterface) {
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await (this as LelantusInterface).refreshLelantusData();
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}
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GlobalEventBus.instance.fire(RefreshPercentChangedEvent(0.90, walletId));
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await updateBalance();
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GlobalEventBus.instance.fire(RefreshPercentChangedEvent(1.0, walletId));
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GlobalEventBus.instance.fire(
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WalletSyncStatusChangedEvent(
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WalletSyncStatus.synced,
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walletId,
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cryptoCurrency.coin,
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),
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);
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if (shouldAutoSync) {
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_periodicRefreshTimer ??=
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Timer.periodic(const Duration(seconds: 150), (timer) async {
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// chain height check currently broken
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// if ((await chainHeight) != (await storedChainHeight)) {
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// TODO: [prio=med] some kind of quick check if wallet needs to refresh to replace the old refreshIfThereIsNewData call
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// if (await refreshIfThereIsNewData()) {
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unawaited(refresh());
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// }
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// }
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});
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}
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} catch (error, strace) {
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GlobalEventBus.instance.fire(
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NodeConnectionStatusChangedEvent(
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NodeConnectionStatus.disconnected,
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walletId,
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cryptoCurrency.coin,
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),
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);
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GlobalEventBus.instance.fire(
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WalletSyncStatusChangedEvent(
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WalletSyncStatus.unableToSync,
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walletId,
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cryptoCurrency.coin,
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),
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);
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Logging.instance.log(
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"Caught exception in refreshWalletData(): $error\n$strace",
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level: LogLevel.Error,
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);
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} finally {
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refreshMutex.release();
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}
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}
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Future<void> exit() async {
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_periodicRefreshTimer?.cancel();
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_networkAliveTimer?.cancel();
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// TODO:
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}
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@mustCallSuper
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Future<void> init() async {
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final address = await getCurrentReceivingAddress();
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if (address != null) {
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await info.updateReceivingAddress(
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newAddress: address.value,
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isar: mainDB.isar,
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);
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}
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// TODO: make sure subclasses override this if they require some set up
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// especially xmr/wow/epiccash
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}
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// ===========================================================================
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FilterOperation? get receivingAddressFilterOperation;
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FilterOperation? get changeAddressFilterOperation;
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Future<Address?> getCurrentReceivingAddress() async {
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return await _addressQuery(receivingAddressFilterOperation);
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}
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Future<Address?> getCurrentChangeAddress() async {
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return await _addressQuery(changeAddressFilterOperation);
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}
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Future<Address?> _addressQuery(FilterOperation? filterOperation) async {
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return await mainDB.isar.addresses
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.buildQuery<Address>(
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whereClauses: [
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IndexWhereClause.equalTo(
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indexName: r"walletId",
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value: [walletId],
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),
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],
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filter: filterOperation,
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sortBy: [
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const SortProperty(
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property: r"derivationIndex",
|
|
sort: Sort.desc,
|
|
),
|
|
],
|
|
)
|
|
.findFirst();
|
|
}
|
|
}
|