cake_wallet/lib/monero/monero_wallet.dart

443 lines
13 KiB
Dart

import 'dart:async';
import 'package:cake_wallet/entities/transaction_priority.dart';
import 'package:cake_wallet/monero/monero_amount_format.dart';
import 'package:cake_wallet/monero/monero_transaction_creation_exception.dart';
import 'package:cake_wallet/monero/monero_transaction_info.dart';
import 'package:flutter/foundation.dart';
import 'package:mobx/mobx.dart';
import 'package:cw_monero/transaction_history.dart'
as monero_transaction_history;
import 'package:cw_monero/wallet.dart';
import 'package:cw_monero/wallet.dart' as monero_wallet;
import 'package:cw_monero/transaction_history.dart' as transaction_history;
import 'package:cake_wallet/monero/monero_transaction_creation_credentials.dart';
import 'package:cake_wallet/monero/pending_monero_transaction.dart';
import 'package:cake_wallet/monero/monero_wallet_keys.dart';
import 'package:cake_wallet/monero/monero_balance.dart';
import 'package:cake_wallet/monero/monero_transaction_history.dart';
import 'package:cake_wallet/monero/monero_subaddress_list.dart';
import 'package:cake_wallet/monero/monero_account_list.dart';
import 'package:cake_wallet/monero/account.dart';
import 'package:cake_wallet/monero/subaddress.dart';
import 'package:cake_wallet/core/pending_transaction.dart';
import 'package:cake_wallet/core/wallet_base.dart';
import 'package:cake_wallet/entities/sync_status.dart';
import 'package:cake_wallet/entities/wallet_info.dart';
import 'package:cake_wallet/entities/node.dart';
import 'package:cake_wallet/entities/monero_transaction_priority.dart';
part 'monero_wallet.g.dart';
const moneroBlockSize = 1000;
class MoneroWallet = MoneroWalletBase with _$MoneroWallet;
abstract class MoneroWalletBase extends WalletBase<MoneroBalance,
MoneroTransactionHistory, MoneroTransactionInfo> with Store {
MoneroWalletBase({WalletInfo walletInfo})
: accountList = MoneroAccountList(),
subaddressList = MoneroSubaddressList(),
super(walletInfo) {
transactionHistory = MoneroTransactionHistory();
balance = MoneroBalance(
fullBalance: monero_wallet.getFullBalance(accountIndex: 0),
unlockedBalance: monero_wallet.getFullBalance(accountIndex: 0));
_lastAutosaveTimestamp = 0;
_lastSaveTimestamp = 0;
_isSavingAfterSync = false;
_isSavingAfterNewTransaction = false;
_isTransactionUpdating = false;
_onAccountChangeReaction = reaction((_) => account, (Account account) {
balance = MoneroBalance(
fullBalance: monero_wallet.getFullBalance(accountIndex: account.id),
unlockedBalance:
monero_wallet.getUnlockedBalance(accountIndex: account.id));
subaddressList.update(accountIndex: account.id);
subaddress = subaddressList.subaddresses.first;
address = subaddress.address;
});
}
static const int _autoAfterSyncSaveInterval = 60000;
@observable
Account account;
@observable
Subaddress subaddress;
@override
@observable
SyncStatus syncStatus;
@override
@observable
String address;
@override
@observable
MoneroBalance balance;
@override
String get seed => monero_wallet.getSeed();
@override
MoneroWalletKeys get keys => MoneroWalletKeys(
privateSpendKey: monero_wallet.getSecretSpendKey(),
privateViewKey: monero_wallet.getSecretViewKey(),
publicSpendKey: monero_wallet.getPublicSpendKey(),
publicViewKey: monero_wallet.getPublicViewKey());
final MoneroSubaddressList subaddressList;
final MoneroAccountList accountList;
SyncListener _listener;
ReactionDisposer _onAccountChangeReaction;
int _lastAutosaveTimestamp;
bool _isSavingAfterSync;
bool _isSavingAfterNewTransaction;
bool _isTransactionUpdating;
int _lastSaveTimestamp;
Future<void> init() async {
accountList.update();
account = accountList.accounts.first;
subaddressList.update(accountIndex: account.id ?? 0);
subaddress = subaddressList.getAll().first;
balance = MoneroBalance(
fullBalance: monero_wallet.getFullBalance(accountIndex: account.id),
unlockedBalance:
monero_wallet.getUnlockedBalance(accountIndex: account.id));
address = subaddress.address;
_setListeners();
await updateTransactions();
if (walletInfo.isRecovery) {
monero_wallet.setRecoveringFromSeed(isRecovery: walletInfo.isRecovery);
if (monero_wallet.getCurrentHeight() <= 1) {
monero_wallet.setRefreshFromBlockHeight(
height: walletInfo.restoreHeight);
}
}
}
@override
void close() {
_listener?.stop();
_onAccountChangeReaction?.reaction?.dispose();
}
bool validate() {
accountList.update();
final accountListLength = accountList.accounts?.length ?? 0;
if (accountListLength <= 0) {
return false;
}
subaddressList.update(accountIndex: accountList.accounts.first.id);
final subaddressListLength = subaddressList.subaddresses?.length ?? 0;
if (subaddressListLength <= 0) {
return false;
}
return true;
}
@override
Future<void> connectToNode({@required Node node}) async {
try {
syncStatus = ConnectingSyncStatus();
await monero_wallet.setupNode(
address: node.uri.toString(),
login: node.login,
password: node.password,
useSSL: node.isSSL,
isLightWallet: false); // FIXME: hardcoded value
syncStatus = ConnectedSyncStatus();
} catch (e) {
syncStatus = FailedSyncStatus();
print(e);
}
}
@override
Future<void> startSync() async {
try {
_setInitialHeight();
} catch (_) {}
try {
syncStatus = StartingSyncStatus();
monero_wallet.startRefresh();
_setListeners();
_listener?.start();
} catch (e) {
syncStatus = FailedSyncStatus();
print(e);
rethrow;
}
}
@override
Future<PendingTransaction> createTransaction(Object credentials) async {
final _credentials = credentials as MoneroTransactionCreationCredentials;
final amount = _credentials.amount != null
? moneroParseAmount(amount: _credentials.amount)
: null;
final unlockedBalance =
monero_wallet.getUnlockedBalance(accountIndex: account.id);
if ((amount != null && unlockedBalance < amount) ||
(amount == null && unlockedBalance <= 0)) {
final formattedBalance = moneroAmountToString(amount: unlockedBalance);
throw MoneroTransactionCreationException(
'Incorrect unlocked balance. Unlocked: $formattedBalance. Transaction amount: ${_credentials.amount}.');
}
if (!(syncStatus is SyncedSyncStatus)) {
throw MoneroTransactionCreationException('The wallet is not synced.');
}
final pendingTransactionDescription =
await transaction_history.createTransaction(
address: _credentials.address,
paymentId: _credentials.paymentId,
amount: _credentials.amount,
priorityRaw: _credentials.priority.serialize(),
accountIndex: account.id);
return PendingMoneroTransaction(pendingTransactionDescription);
}
@override
int calculateEstimatedFee(TransactionPriority priority, int amount) {
// FIXME: hardcoded value;
if (priority is MoneroTransactionPriority) {
switch (priority) {
case MoneroTransactionPriority.slow:
return 24590000;
case MoneroTransactionPriority.regular:
return 123050000;
case MoneroTransactionPriority.medium:
return 245029999;
case MoneroTransactionPriority.fast:
return 614530000;
case MoneroTransactionPriority.fastest:
return 26021600000;
}
}
return 0;
}
@override
Future<void> save() async {
final now = DateTime.now().millisecondsSinceEpoch;
if (now - _lastSaveTimestamp < Duration(seconds: 10).inMilliseconds) {
return;
}
_lastSaveTimestamp = now;
await monero_wallet.store();
}
Future<int> getNodeHeight() async => monero_wallet.getNodeHeight();
Future<bool> isConnected() async => monero_wallet.isConnected();
Future<void> setAsRecovered() async {
walletInfo.isRecovery = false;
await walletInfo.save();
}
@override
Future<void> rescan({int height}) async {
walletInfo.restoreHeight = height;
walletInfo.isRecovery = true;
monero_wallet.setRefreshFromBlockHeight(height: height);
monero_wallet.rescanBlockchainAsync();
await startSync();
_askForUpdateBalance();
accountList.update();
await _askForUpdateTransactionHistory();
await save();
await walletInfo.save();
}
@override
Future<Map<String, MoneroTransactionInfo>> fetchTransactions() async {
monero_transaction_history.refreshTransactions();
return _getAllTransactions(null).fold<Map<String, MoneroTransactionInfo>>(
<String, MoneroTransactionInfo>{},
(Map<String, MoneroTransactionInfo> acc, MoneroTransactionInfo tx) {
acc[tx.id] = tx;
return acc;
});
}
Future<void> updateTransactions() async {
try {
if (_isTransactionUpdating) {
return;
}
_isTransactionUpdating = true;
final transactions = await fetchTransactions();
transactionHistory.addMany(transactions);
await transactionHistory.save();
_isTransactionUpdating = false;
} catch (e) {
print(e);
_isTransactionUpdating = false;
}
}
List<MoneroTransactionInfo> _getAllTransactions(dynamic _) =>
monero_transaction_history
.getAllTransations()
.map((row) => MoneroTransactionInfo.fromRow(row))
.toList();
void _setListeners() {
_listener?.stop();
_listener = monero_wallet.setListeners(_onNewBlock, _onNewTransaction);
}
void _setInitialHeight() {
if (walletInfo.isRecovery) {
return;
}
final currentHeight = getCurrentHeight();
if (currentHeight <= 1) {
final height = _getHeightByDate(walletInfo.date);
monero_wallet.setRecoveringFromSeed(isRecovery: true);
monero_wallet.setRefreshFromBlockHeight(height: height);
}
}
int _getHeightDistance(DateTime date) {
final distance =
DateTime.now().millisecondsSinceEpoch - date.millisecondsSinceEpoch;
final daysTmp = (distance / 86400).round();
final days = daysTmp < 1 ? 1 : daysTmp;
return days * 1000;
}
int _getHeightByDate(DateTime date) {
final nodeHeight = monero_wallet.getNodeHeightSync();
final heightDistance = _getHeightDistance(date);
if (nodeHeight <= 0) {
return 0;
}
return nodeHeight - heightDistance;
}
void _askForUpdateBalance() {
final unlockedBalance = _getUnlockedBalance();
final fullBalance = _getFullBalance();
if (balance.fullBalance != fullBalance ||
balance.unlockedBalance != unlockedBalance) {
balance = MoneroBalance(
fullBalance: fullBalance, unlockedBalance: unlockedBalance);
}
}
Future<void> _askForUpdateTransactionHistory() async =>
await updateTransactions();
int _getFullBalance() =>
monero_wallet.getFullBalance(accountIndex: account.id);
int _getUnlockedBalance() =>
monero_wallet.getUnlockedBalance(accountIndex: account.id);
Future<void> _afterSyncSave() async {
try {
if (_isSavingAfterSync) {
return;
}
_isSavingAfterSync = true;
final nowTimestamp = DateTime.now().millisecondsSinceEpoch;
final sum = _lastAutosaveTimestamp + _autoAfterSyncSaveInterval;
if (_lastAutosaveTimestamp > 0 && sum < nowTimestamp) {
return;
}
await save();
_lastAutosaveTimestamp = nowTimestamp + _autoAfterSyncSaveInterval;
} catch (e) {
print(e.toString());
}
_isSavingAfterSync = false;
}
Future<void> _afterNewTransactionSave() async {
try {
if (_isSavingAfterNewTransaction) {
return;
}
_isSavingAfterNewTransaction = true;
await save();
} catch (e) {
print(e.toString());
}
_isSavingAfterNewTransaction = false;
}
void _onNewBlock(int height, int blocksLeft, double ptc) async {
try {
if (walletInfo.isRecovery) {
await _askForUpdateTransactionHistory();
_askForUpdateBalance();
accountList.update();
}
if (blocksLeft < 100) {
await _askForUpdateTransactionHistory();
_askForUpdateBalance();
accountList.update();
syncStatus = SyncedSyncStatus();
await _afterSyncSave();
if (walletInfo.isRecovery) {
await setAsRecovered();
}
} else {
syncStatus = SyncingSyncStatus(blocksLeft, ptc);
}
} catch (e) {
print(e.toString());
}
}
void _onNewTransaction() async {
try {
await _askForUpdateTransactionHistory();
_askForUpdateBalance();
await Future<void>.delayed(Duration(seconds: 1));
await _afterNewTransactionSave();
} catch (e) {
print(e.toString());
}
}
}