mirror of
https://github.com/cake-tech/cake_wallet.git
synced 2024-12-23 03:59:23 +00:00
468 lines
17 KiB
Dart
468 lines
17 KiB
Dart
import 'dart:async';
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import 'dart:io';
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import 'package:cw_core/cake_hive.dart';
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import 'package:cw_core/crypto_currency.dart';
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import 'package:cw_core/node.dart';
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import 'package:cw_core/pathForWallet.dart';
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import 'package:cw_core/pending_transaction.dart';
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import 'package:cw_core/sync_status.dart';
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import 'package:cw_core/transaction_priority.dart';
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import 'package:cw_core/wallet_base.dart';
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import 'package:cw_core/wallet_credentials.dart';
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import 'package:cw_core/wallet_info.dart';
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import 'package:cw_zano/api/model/create_wallet_result.dart';
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import 'package:cw_zano/api/model/destination.dart';
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import 'package:cw_zano/api/model/get_recent_txs_and_info_result.dart';
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import 'package:cw_zano/api/model/get_wallet_status_result.dart';
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import 'package:cw_zano/api/model/transfer.dart';
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import 'package:cw_zano/model/pending_zano_transaction.dart';
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import 'package:cw_zano/model/zano_asset.dart';
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import 'package:cw_zano/model/zano_balance.dart';
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import 'package:cw_zano/model/zano_transaction_creation_exception.dart';
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import 'package:cw_zano/model/zano_transaction_credentials.dart';
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import 'package:cw_zano/model/zano_transaction_info.dart';
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import 'package:cw_zano/model/zano_wallet_keys.dart';
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import 'package:cw_zano/zano_formatter.dart';
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import 'package:cw_zano/zano_transaction_history.dart';
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import 'package:cw_zano/zano_wallet_addresses.dart';
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import 'package:cw_zano/zano_wallet_api.dart';
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import 'package:cw_zano/zano_wallet_exceptions.dart';
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import 'package:cw_zano/zano_wallet_service.dart';
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import 'package:flutter/material.dart';
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import 'package:mobx/mobx.dart';
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part 'zano_wallet.g.dart';
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class ZanoWallet = ZanoWalletBase with _$ZanoWallet;
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abstract class ZanoWalletBase extends WalletBase<ZanoBalance, ZanoTransactionHistory, ZanoTransactionInfo> with Store, ZanoWalletApi {
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static const int _autoSaveIntervalSeconds = 30;
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static const int _pollIntervalMilliseconds = 2000;
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@override
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ZanoWalletAddresses walletAddresses;
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@override
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@observable
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SyncStatus syncStatus;
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@override
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@observable
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ObservableMap<CryptoCurrency, ZanoBalance> balance;
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@override
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String seed = '';
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@override
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ZanoWalletKeys keys = ZanoWalletKeys(privateSpendKey: '', privateViewKey: '', publicSpendKey: '', publicViewKey: '');
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static const String zanoAssetId = 'd6329b5b1f7c0805b5c345f4957554002a2f557845f64d7645dae0e051a6498a';
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Map<String, ZanoAsset> zanoAssets = {};
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Timer? _updateSyncInfoTimer;
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int _lastKnownBlockHeight = 0;
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int _initialSyncHeight = 0;
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int currentDaemonHeight = 0;
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bool _isTransactionUpdating;
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bool _hasSyncAfterStartup;
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Timer? _autoSaveTimer;
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/// index of last transaction fetched
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int _lastTxIndex = 0;
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/// number of transactions in each request
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static const int _txChunkSize = 30;
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ZanoWalletBase(WalletInfo walletInfo)
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: balance = ObservableMap.of({CryptoCurrency.zano: ZanoBalance.empty()}),
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_isTransactionUpdating = false,
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_hasSyncAfterStartup = false,
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walletAddresses = ZanoWalletAddresses(walletInfo),
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syncStatus = NotConnectedSyncStatus(),
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super(walletInfo) {
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transactionHistory = ZanoTransactionHistory();
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if (!CakeHive.isAdapterRegistered(ZanoAsset.typeId)) {
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CakeHive.registerAdapter(ZanoAssetAdapter());
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}
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}
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@override
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int calculateEstimatedFee(TransactionPriority priority, [int? amount = null]) => getCurrentTxFee(priority);
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@override
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Future<void> changePassword(String password) async {
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setPassword(password);
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}
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static Future<ZanoWallet> create({required WalletCredentials credentials}) async {
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final wallet = ZanoWallet(credentials.walletInfo!);
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await wallet.connectToNode(node: Node());
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final path = await pathForWallet(name: credentials.name, type: credentials.walletInfo!.type);
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final createWalletResult = await wallet.createWallet(path, credentials.password!);
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await _parseCreateWalletResult(createWalletResult, wallet);
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await wallet.init(createWalletResult.wi.address);
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return wallet;
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}
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static Future<ZanoWallet> restore({required ZanoRestoreWalletFromSeedCredentials credentials}) async {
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final wallet = ZanoWallet(credentials.walletInfo!);
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await wallet.connectToNode(node: Node());
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final path = await pathForWallet(name: credentials.name, type: credentials.walletInfo!.type);
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final createWalletResult = await wallet.restoreWalletFromSeed(path, credentials.password!, credentials.mnemonic);
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await _parseCreateWalletResult(createWalletResult, wallet);
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await wallet.init(createWalletResult.wi.address);
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return wallet;
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}
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static Future<ZanoWallet> open({required String name, required String password, required WalletInfo walletInfo}) async {
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final path = await pathForWallet(name: name, type: walletInfo.type);
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final wallet = ZanoWallet(walletInfo);
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await wallet.connectToNode(node: Node());
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final createWalletResult = await wallet.loadWallet(path, password);
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await _parseCreateWalletResult(createWalletResult, wallet);
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await wallet.init(createWalletResult.wi.address);
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return wallet;
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}
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static Future<void> _parseCreateWalletResult(CreateWalletResult result, ZanoWallet wallet) async {
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wallet.hWallet = result.walletId;
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ZanoWalletApi.info('setting hWallet = ${result.walletId}');
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wallet.walletAddresses.address = result.wi.address;
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for (final item in result.wi.balances) {
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if (item.assetInfo.assetId == zanoAssetId) {
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wallet.balance[CryptoCurrency.zano] = ZanoBalance(
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total: item.total,
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unlocked: item.unlocked,
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);
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}
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}
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if (result.recentHistory.history != null) {
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final transfers = result.recentHistory.history!;
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final transactions = Transfer.makeMap(transfers, wallet.zanoAssets, wallet.currentDaemonHeight);
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wallet.transactionHistory.addMany(transactions);
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await wallet.transactionHistory.save();
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}
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}
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@override
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void close() {
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closeWallet();
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_updateSyncInfoTimer?.cancel();
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_autoSaveTimer?.cancel();
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}
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@override
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Future<void> connectToNode({required Node node}) async {
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syncStatus = ConnectingSyncStatus();
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await setupNode();
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syncStatus = ConnectedSyncStatus();
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}
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@override
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Future<PendingTransaction> createTransaction(Object credentials) async {
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credentials as ZanoTransactionCredentials;
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final isZano = credentials.currency == CryptoCurrency.zano;
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final outputs = credentials.outputs;
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final hasMultiDestination = outputs.length > 1;
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final unlockedBalanceZano = BigInt.from(balance[CryptoCurrency.zano]?.unlocked ?? 0);
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final unlockedBalanceCurrency = BigInt.from(balance[credentials.currency]?.unlocked ?? 0);
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final fee = BigInt.from(calculateEstimatedFee(credentials.priority));
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late BigInt totalAmount;
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void checkForEnoughBalances() {
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if (isZano) {
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if (totalAmount + fee > unlockedBalanceZano) {
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throw ZanoTransactionCreationException(
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"You don't have enough coins (required: ${ZanoFormatter.bigIntAmountToString(totalAmount + fee)} ZANO, unlocked ${ZanoFormatter.bigIntAmountToString(unlockedBalanceZano)} ZANO).");
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}
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} else {
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if (fee > unlockedBalanceZano) {
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throw ZanoTransactionCreationException(
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"You don't have enough coins (required: ${ZanoFormatter.bigIntAmountToString(fee)} ZANO, unlocked ${ZanoFormatter.bigIntAmountToString(unlockedBalanceZano)} ZANO).");
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}
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if (totalAmount > unlockedBalanceCurrency) {
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throw ZanoTransactionCreationException(
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"You don't have enough coins (required: ${ZanoFormatter.bigIntAmountToString(totalAmount)} ${credentials.currency.title}, unlocked ${ZanoFormatter.bigIntAmountToString(unlockedBalanceZano)} ${credentials.currency.title}).");
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}
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}
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}
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final assetId = isZano ? zanoAssetId : (credentials.currency as ZanoAsset).assetId;
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late List<Destination> destinations;
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if (hasMultiDestination) {
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if (outputs.any((output) => output.sendAll || (output.formattedCryptoAmount ?? 0) <= 0)) {
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throw ZanoTransactionCreationException("You don't have enough coins.");
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}
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totalAmount = outputs.fold(BigInt.zero, (acc, value) => acc + BigInt.from(value.formattedCryptoAmount ?? 0));
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checkForEnoughBalances();
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destinations = outputs
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.map((output) => Destination(
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amount: BigInt.from(output.formattedCryptoAmount ?? 0),
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address: output.isParsedAddress ? output.extractedAddress! : output.address,
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assetId: assetId,
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))
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.toList();
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} else {
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final output = outputs.first;
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if (output.sendAll) {
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if (isZano) {
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totalAmount = unlockedBalanceZano - fee;
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} else {
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totalAmount = unlockedBalanceCurrency;
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}
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} else {
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totalAmount = BigInt.from(output.formattedCryptoAmount!);
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}
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checkForEnoughBalances();
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destinations = [
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Destination(
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amount: totalAmount,
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address: output.isParsedAddress ? output.extractedAddress! : output.address,
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assetId: assetId,
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)
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];
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}
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return PendingZanoTransaction(
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zanoWallet: this,
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destinations: destinations,
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fee: fee,
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comment: outputs.first.note ?? '',
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assetId: assetId,
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ticker: credentials.currency.title,
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decimalPoint: credentials.currency.decimals,
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amount: totalAmount,
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);
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}
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@override
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Future<Map<String, ZanoTransactionInfo>> fetchTransactions() async {
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try {
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final transfers = <Transfer>[];
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late GetRecentTxsAndInfoResult result;
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do {
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result = await getRecentTxsAndInfo(offset: _lastTxIndex, count: _txChunkSize);
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_lastTxIndex += result.transfers.length;
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transfers.addAll(result.transfers);
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} while (result.lastItemIndex + 1 < result.totalTransfers);
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return Transfer.makeMap(transfers, zanoAssets, currentDaemonHeight);
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} catch (e) {
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print(e);
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return {};
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}
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}
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Future<void> init(String address) async {
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await walletAddresses.init();
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await walletAddresses.updateAddress(address);
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await updateTransactions();
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_autoSaveTimer = Timer.periodic(Duration(seconds: _autoSaveIntervalSeconds), (_) async => await save());
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}
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@override
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Future<void> renameWalletFiles(String newWalletName) async {
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final currentWalletPath = await pathForWallet(name: name, type: type);
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final currentCacheFile = File(currentWalletPath);
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final currentKeysFile = File('$currentWalletPath.keys');
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final currentAddressListFile = File('$currentWalletPath.address.txt');
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final newWalletPath = await pathForWallet(name: newWalletName, type: type);
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// Copies current wallet files into new wallet name's dir and files
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if (currentCacheFile.existsSync()) {
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await currentCacheFile.copy(newWalletPath);
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}
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if (currentKeysFile.existsSync()) {
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await currentKeysFile.copy('$newWalletPath.keys');
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}
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if (currentAddressListFile.existsSync()) {
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await currentAddressListFile.copy('$newWalletPath.address.txt');
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}
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// Delete old name's dir and files
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await Directory(currentWalletPath).delete(recursive: true);
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}
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@override
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Future<void> rescan({required int height}) => throw UnimplementedError();
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@override
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Future<void> save() async {
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try {
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await store();
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await walletAddresses.updateAddressesInBox();
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} catch (e) {
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print('Error while saving Zano wallet file ${e.toString()}');
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}
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}
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@override
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Future<void> startSync() async {
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try {
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syncStatus = AttemptingSyncStatus();
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_lastKnownBlockHeight = 0;
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_initialSyncHeight = 0;
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_updateSyncInfoTimer ??= Timer.periodic(Duration(milliseconds: _pollIntervalMilliseconds), (_) async {
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final walletStatus = await getWalletStatus();
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currentDaemonHeight = walletStatus.currentDaemonHeight;
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_updateSyncProgress(walletStatus);
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// we can call getWalletInfo ONLY if getWalletStatus returns NOT is in long refresh and wallet state is 2 (ready)
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if (!walletStatus.isInLongRefresh && walletStatus.walletState == 2) {
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final walletInfo = await getWalletInfo();
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seed = walletInfo.wiExtended.seed;
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keys = ZanoWalletKeys(
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privateSpendKey: walletInfo.wiExtended.spendPrivateKey,
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privateViewKey: walletInfo.wiExtended.viewPrivateKey,
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publicSpendKey: walletInfo.wiExtended.spendPublicKey,
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publicViewKey: walletInfo.wiExtended.viewPublicKey,
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);
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final assets = await getAssetsWhitelist();
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zanoAssets = {};
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for (final asset in assets) {
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final newAsset = ZanoAsset.copyWith(asset,
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icon: _getIconPath(asset.title), enabled: walletInfo.wi.balances.any((element) => element.assetId == asset.assetId));
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zanoAssets.putIfAbsent(asset.assetId, () => newAsset);
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}
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// matching balances and whitelists
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// 1. show only balances available in whitelists
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// 2. set whitelists available in balances as 'enabled' ('disabled' by default)
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for (final b in walletInfo.wi.balances) {
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if (b.assetId == zanoAssetId) {
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balance[CryptoCurrency.zano] = ZanoBalance(total: b.total, unlocked: b.unlocked);
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} else {
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final asset = zanoAssets[b.assetId];
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if (asset == null) {
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ZanoWalletApi.error('balance for an unknown asset ${b.assetInfo.assetId}');
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continue;
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}
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if (balance.keys.any((element) => element is ZanoAsset && element.assetId == b.assetInfo.assetId)) {
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balance[balance.keys.firstWhere((element) => element is ZanoAsset && element.assetId == b.assetInfo.assetId)] =
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ZanoBalance(total: b.total, unlocked: b.unlocked, decimalPoint: asset.decimalPoint);
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} else {
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balance[asset] = ZanoBalance(total: b.total, unlocked: b.unlocked, decimalPoint: asset.decimalPoint);
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}
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}
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}
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// removing balances for assets missing in wallet info balances
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balance.removeWhere(
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(key, _) => key != CryptoCurrency.zano && !walletInfo.wi.balances.any((element) => element.assetId == (key as ZanoAsset).assetId),
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);
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}
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});
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} catch (e) {
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syncStatus = FailedSyncStatus();
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print(e);
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rethrow;
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}
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}
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@override
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Future<void>? updateBalance() => null;
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Future<void> updateTransactions() async {
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try {
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if (_isTransactionUpdating) {
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return;
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}
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_isTransactionUpdating = true;
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final transactions = await fetchTransactions();
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transactionHistory.addMany(transactions);
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await transactionHistory.save();
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_isTransactionUpdating = false;
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} catch (e) {
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print(e);
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_isTransactionUpdating = false;
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}
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}
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Future<CryptoCurrency> addZanoAssetById(String assetId) async {
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if (zanoAssets.containsKey(assetId)) {
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throw ZanoWalletException('zano asset with id $assetId already added');
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}
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final assetDescriptor = await addAssetsWhitelist(assetId);
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if (assetDescriptor == null) {
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throw ZanoWalletException("there's no zano asset with id $assetId");
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}
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final asset = ZanoAsset.copyWith(assetDescriptor, icon: _getIconPath(assetDescriptor.title), assetId: assetId, enabled: true);
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zanoAssets[asset.assetId] = asset;
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balance[asset] = ZanoBalance.empty(decimalPoint: asset.decimalPoint);
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return asset;
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}
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String? _getIconPath(String title) {
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try {
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return CryptoCurrency.all.firstWhere((element) => element.title.toUpperCase() == title.toUpperCase()).iconPath;
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} catch (_) {}
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return null;
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}
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Future<void> changeZanoAssetAvailability(ZanoAsset asset) async {
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if (asset.enabled) {
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final assetDescriptor = await addAssetsWhitelist(asset.assetId);
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if (assetDescriptor == null) {
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print('Error adding zano asset');
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}
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} else {
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final result = await removeAssetsWhitelist(asset.assetId);
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if (result == false) {
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print('Error removing zano asset');
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}
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}
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}
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Future<void> deleteZanoAsset(ZanoAsset asset) async {
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final _ = await removeAssetsWhitelist(asset.assetId);
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}
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Future<ZanoAsset?> getZanoAsset(String assetId) async {
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return await getAssetInfo(assetId);
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}
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Future<void> _askForUpdateTransactionHistory() async => await updateTransactions();
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void _onNewBlock(int height, int blocksLeft, double ptc) async {
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try {
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if (blocksLeft < 1000) {
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await _askForUpdateTransactionHistory();
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syncStatus = SyncedSyncStatus();
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if (!_hasSyncAfterStartup) {
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_hasSyncAfterStartup = true;
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await save();
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}
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} else {
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syncStatus = SyncingSyncStatus(blocksLeft, ptc);
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}
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} catch (e) {
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print(e.toString());
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}
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}
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void _updateSyncProgress(GetWalletStatusResult walletStatus) {
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final syncHeight = walletStatus.currentWalletHeight;
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if (_initialSyncHeight <= 0) {
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_initialSyncHeight = syncHeight;
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}
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final bchHeight = walletStatus.currentDaemonHeight;
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if (_lastKnownBlockHeight == syncHeight) {
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return;
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}
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_lastKnownBlockHeight = syncHeight;
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final track = bchHeight - _initialSyncHeight;
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final diff = track - (bchHeight - syncHeight);
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final ptc = diff <= 0 ? 0.0 : diff / track;
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final left = bchHeight - syncHeight;
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if (syncHeight < 0 || left < 0) {
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return;
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}
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// 1. Actual new height; 2. Blocks left to finish; 3. Progress in percents;
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_onNewBlock.call(syncHeight, left, ptc);
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}
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}
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