migrate monero_wallet.dart to isar transactions, addresses, and utxos, as well as the cleaner balance model

This commit is contained in:
julian 2023-01-11 21:09:08 -06:00
parent 275e3ab4cb
commit c83ec074de

View file

@ -21,13 +21,13 @@ import 'package:flutter_libmonero/core/key_service.dart';
import 'package:flutter_libmonero/core/wallet_creation_service.dart';
import 'package:flutter_libmonero/monero/monero.dart';
import 'package:flutter_libmonero/view_model/send/output.dart' as monero_output;
import 'package:http/http.dart';
import 'package:isar/isar.dart';
import 'package:mutex/mutex.dart';
import 'package:stackwallet/hive/db.dart';
import 'package:stackwallet/models/balance.dart';
import 'package:stackwallet/models/isar/models/isar_models.dart' as isar_models;
import 'package:stackwallet/models/node_model.dart';
import 'package:stackwallet/models/paymint/fee_object_model.dart';
import 'package:stackwallet/models/paymint/transactions_model.dart';
import 'package:stackwallet/models/paymint/utxo_model.dart';
import 'package:stackwallet/services/coins/coin_service.dart';
import 'package:stackwallet/services/event_bus/events/global/blocks_remaining_event.dart';
import 'package:stackwallet/services/event_bus/events/global/refresh_percent_changed_event.dart';
@ -35,7 +35,6 @@ import 'package:stackwallet/services/event_bus/events/global/updated_in_backgrou
import 'package:stackwallet/services/event_bus/events/global/wallet_sync_status_changed_event.dart';
import 'package:stackwallet/services/event_bus/global_event_bus.dart';
import 'package:stackwallet/services/node_service.dart';
import 'package:stackwallet/services/price.dart';
import 'package:stackwallet/utilities/constants.dart';
import 'package:stackwallet/utilities/default_nodes.dart';
import 'package:stackwallet/utilities/enums/coin_enum.dart';
@ -51,10 +50,11 @@ const int MINIMUM_CONFIRMATIONS = 10;
class MoneroWallet extends CoinServiceAPI {
final String _walletId;
final Coin _coin;
final PriceAPI _priceAPI;
final SecureStorageInterface _secureStorage;
final Prefs _prefs;
late Isar isar;
String _walletName;
bool _shouldAutoSync = false;
bool _isConnected = false;
@ -68,9 +68,9 @@ class MoneroWallet extends CoinServiceAPI {
WalletCreationService? _walletCreationService;
Timer? _autoSaveTimer;
Future<String>? _currentReceivingAddress;
Future<isar_models.Address?> get _currentReceivingAddress =>
isar.addresses.where().sortByDerivationIndexDesc().findFirst();
Future<FeeObject>? _feeObject;
Future<TransactionData>? _transactionData;
Mutex prepareSendMutex = Mutex();
Mutex estimateFeeMutex = Mutex();
@ -80,15 +80,29 @@ class MoneroWallet extends CoinServiceAPI {
required String walletName,
required Coin coin,
required SecureStorageInterface secureStorage,
PriceAPI? priceAPI,
Prefs? prefs,
}) : _walletId = walletId,
_walletName = walletName,
_coin = coin,
_priceAPI = priceAPI ?? PriceAPI(Client()),
_secureStorage = secureStorage,
_prefs = prefs ?? Prefs.instance;
Future<void> _isarInit() async {
isar = await Isar.open(
[
isar_models.TransactionSchema,
isar_models.TransactionNoteSchema,
isar_models.InputSchema,
isar_models.OutputSchema,
isar_models.UTXOSchema,
isar_models.AddressSchema,
],
directory: (await StackFileSystem.applicationIsarDirectory()).path,
inspector: false,
name: walletId,
);
}
@override
bool get isFavorite {
try {
@ -139,23 +153,6 @@ class MoneroWallet extends CoinServiceAPI {
@override
set walletName(String newName) => _walletName = newName;
@override
// not used for monero
Future<List<String>> get allOwnAddresses async => [];
@override
Future<Decimal> get availableBalance async {
int runningBalance = 0;
for (final entry in walletBase!.balance!.entries) {
runningBalance += entry.value.unlockedBalance;
}
return Format.satoshisToAmount(runningBalance, coin: coin);
}
@override
// not used
Future<Decimal> get balanceMinusMaxFee => throw UnimplementedError();
@override
Coin get coin => _coin;
@ -184,8 +181,8 @@ class MoneroWallet extends CoinServiceAPI {
}
@override
Future<String> get currentReceivingAddress =>
_currentReceivingAddress ??= _getCurrentAddressForChain(0);
Future<String> get currentReceivingAddress async =>
(await _currentReceivingAddress)!.value;
@override
Future<int> estimateFeeFor(int satoshiAmount, int feeRate) async {
@ -225,6 +222,7 @@ class MoneroWallet extends CoinServiceAPI {
_autoSaveTimer?.cancel();
await walletBase?.save(prioritySave: true);
walletBase?.close();
await isar.close();
}
}
@ -244,22 +242,20 @@ class MoneroWallet extends CoinServiceAPI {
@override
Future<bool> generateNewAddress() async {
try {
const String indexKey = "receivingIndex";
// First increment the receiving index
await _incrementAddressIndexForChain(0);
final newReceivingIndex =
DB.instance.get<dynamic>(boxName: walletId, key: indexKey) as int;
final currentReceiving = await _currentReceivingAddress;
final newReceivingIndex = currentReceiving!.derivationIndex + 1;
// Use new index to derive a new receiving address
final newReceivingAddress =
await _generateAddressForChain(0, newReceivingIndex);
final newReceivingAddress = await _generateAddressForChain(
0,
newReceivingIndex,
);
// Add that new receiving address to the array of receiving addresses
await _addToAddressesArrayForChain(newReceivingAddress, 0);
// Set the new receiving address that the service
_currentReceivingAddress = Future(() => newReceivingAddress);
// Add that new receiving address
await isar.writeTxn(() async {
await isar.addresses.put(newReceivingAddress);
});
return true;
} catch (e, s) {
@ -290,6 +286,7 @@ class MoneroWallet extends CoinServiceAPI {
keysStorage = KeyService(_secureStorage);
await _prefs.init();
await _isarInit();
// final data =
// DB.instance.get<dynamic>(boxName: walletId, key: "latest_tx_model")
// as TransactionData?;
@ -314,14 +311,14 @@ class MoneroWallet extends CoinServiceAPI {
);
// Wallet already exists, triggers for a returning user
String indexKey = "receivingIndex";
final curIndex =
await DB.instance.get<dynamic>(boxName: walletId, key: indexKey) as int;
// Use new index to derive a new receiving address
final newReceivingAddress = await _generateAddressForChain(0, curIndex);
Logging.instance.log("xmr address in init existing: $newReceivingAddress",
level: LogLevel.Info);
_currentReceivingAddress = Future(() => newReceivingAddress);
// String indexKey = "receivingIndex";
// final curIndex =
// await DB.instance.get<dynamic>(boxName: walletId, key: indexKey) as int;
// // Use new index to derive a new receiving address
// final newReceivingAddress = await _generateAddressForChain(0, curIndex);
// Logging.instance.log("xmr address in init existing: $newReceivingAddress",
// level: LogLevel.Info);
// _currentReceivingAddress = Future(() => newReceivingAddress);
}
@override
@ -424,18 +421,12 @@ class MoneroWallet extends CoinServiceAPI {
// Generate and add addresses to relevant arrays
final initialReceivingAddress = await _generateAddressForChain(0, 0);
// final initialChangeAddress = await _generateAddressForChain(1, 0);
await _isarInit();
await _addToAddressesArrayForChain(initialReceivingAddress, 0);
// await _addToAddressesArrayForChain(initialChangeAddress, 1);
await isar.writeTxn(() async {
await isar.addresses.put(initialReceivingAddress);
});
await DB.instance.put<dynamic>(
boxName: walletId,
key: 'receivingAddresses',
value: [initialReceivingAddress]);
await DB.instance
.put<dynamic>(boxName: walletId, key: "receivingIndex", value: 0);
_currentReceivingAddress = Future(() => initialReceivingAddress);
walletBase?.close();
Logging.instance
.log("initializeNew for $walletName $walletId", level: LogLevel.Info);
@ -462,10 +453,6 @@ class MoneroWallet extends CoinServiceAPI {
return data;
}
@override
// not used in xmr
Future<Decimal> get pendingBalance => throw UnimplementedError();
@override
Future<Map<String, dynamic>> prepareSend({
required String address,
@ -493,16 +480,15 @@ class MoneroWallet extends CoinServiceAPI {
try {
// check for send all
bool isSendAll = false;
final balance = await availableBalance;
final satInDecimal =
Format.satoshisToAmount(satoshiAmount, coin: coin);
if (satInDecimal == balance) {
final balance = await _availableBalance;
if (satoshiAmount == balance) {
isSendAll = true;
}
Logging.instance
.log("$toAddress $satoshiAmount $args", level: LogLevel.Info);
String amountToSend = satInDecimal
.toStringAsFixed(Constants.decimalPlacesForCoin(coin));
String amountToSend =
Format.satoshisToAmount(satoshiAmount, coin: coin)
.toStringAsFixed(Constants.decimalPlacesForCoin(coin));
Logging.instance
.log("$satoshiAmount $amountToSend", level: LogLevel.Info);
@ -702,22 +688,10 @@ class MoneroWallet extends CoinServiceAPI {
),
);
final newTxData = await _fetchTransactionData();
_transactionData = Future(() => newTxData);
await _refreshTransactions();
await _updateBalance();
await _checkCurrentReceivingAddressesForTransactions();
String indexKey = "receivingIndex";
final curIndex =
DB.instance.get<dynamic>(boxName: walletId, key: indexKey) as int;
// Use new index to derive a new receiving address
try {
final newReceivingAddress = await _generateAddressForChain(0, curIndex);
_currentReceivingAddress = Future(() => newReceivingAddress);
} catch (e, s) {
Logging.instance.log(
"Failed to call _generateAddressForChain(0, $curIndex): $e\n$s",
level: LogLevel.Error);
}
if (walletBase?.syncStatus is SyncedSyncStatus) {
refreshMutex = false;
@ -731,16 +705,6 @@ class MoneroWallet extends CoinServiceAPI {
}
}
@override
Future<String> send({
required String toAddress,
required int amount,
Map<String, String> args = const {},
}) {
// not used for xmr
throw UnimplementedError();
}
@override
Future<bool> testNetworkConnection() async {
return await walletBase?.isConnected() ?? false;
@ -807,8 +771,31 @@ class MoneroWallet extends CoinServiceAPI {
) as int? ??
0;
@override
Future<Decimal> get totalBalance async {
Future<void> _updateBalance() async {
final total = await _totalBalance;
final available = await _availableBalance;
_balance = Balance(
coin: coin,
total: total,
spendable: available,
blockedTotal: 0,
pendingSpendable: total - available,
);
}
Future<int> get _availableBalance async {
try {
int runningBalance = 0;
for (final entry in walletBase!.balance!.entries) {
runningBalance += entry.value.unlockedBalance;
}
return runningBalance;
} catch (_) {
return 0;
}
}
Future<int> get _totalBalance async {
try {
final balanceEntries = walletBase?.balance?.entries;
if (balanceEntries != null) {
@ -817,7 +804,7 @@ class MoneroWallet extends CoinServiceAPI {
bal = bal + element.value.fullBalance;
}
await _updateCachedBalance(bal);
return Format.satoshisToAmount(bal, coin: coin);
return bal;
} else {
final transactions = walletBase!.transactionHistory!.transactions;
int transactionBalance = 0;
@ -830,21 +817,13 @@ class MoneroWallet extends CoinServiceAPI {
}
await _updateCachedBalance(transactionBalance);
return Format.satoshisToAmount(transactionBalance, coin: coin);
return transactionBalance;
}
} catch (_) {
return Format.satoshisToAmount(_getCachedBalance(), coin: coin);
return _getCachedBalance();
}
}
@override
Future<TransactionData> get transactionData =>
_transactionData ??= _fetchTransactionData();
@override
// not used for xmr
Future<List<UtxoObject>> get unspentOutputs => throw UnimplementedError();
@override
Future<void> updateNode(bool shouldRefresh) async {
final node = await _getCurrentNode();
@ -873,66 +852,21 @@ class MoneroWallet extends CoinServiceAPI {
@override
String get walletId => _walletId;
/// Returns the latest receiving/change (external/internal) address for the wallet depending on [chain]
/// and
/// [chain] - Use 0 for receiving (external), 1 for change (internal). Should not be any other value!
Future<String> _getCurrentAddressForChain(int chain) async {
// Here, we assume that chain == 1 if it isn't 0
String arrayKey = chain == 0 ? "receivingAddresses" : "changeAddresses";
final internalChainArray = (DB.instance
.get<dynamic>(boxName: walletId, key: arrayKey)) as List<dynamic>;
return internalChainArray.last as String;
}
/// Increases the index for either the internal or external chain, depending on [chain].
/// [chain] - Use 0 for receiving (external), 1 for change (internal). Should not be any other value!
Future<void> _incrementAddressIndexForChain(int chain) async {
// Here we assume chain == 1 if it isn't 0
String indexKey = chain == 0 ? "receivingIndex" : "changeIndex";
final newIndex =
(DB.instance.get<dynamic>(boxName: walletId, key: indexKey)) + 1;
await DB.instance
.put<dynamic>(boxName: walletId, key: indexKey, value: newIndex);
}
Future<String> _generateAddressForChain(int chain, int index) async {
Future<isar_models.Address> _generateAddressForChain(
int chain,
int index,
) async {
//
String address = walletBase!.getTransactionAddress(chain, index);
return address;
}
/// Adds [address] to the relevant chain's address array, which is determined by [chain].
/// [address] - Expects a standard native segwit address
/// [chain] - Use 0 for receiving (external), 1 for change (internal). Should not be any other value!
Future<void> _addToAddressesArrayForChain(String address, int chain) async {
String chainArray = '';
if (chain == 0) {
chainArray = 'receivingAddresses';
} else {
chainArray = 'changeAddresses';
}
final addressArray =
DB.instance.get<dynamic>(boxName: walletId, key: chainArray);
if (addressArray == null) {
Logging.instance.log(
'Attempting to add the following to $chainArray array for chain $chain:${[
address
]}',
level: LogLevel.Info);
await DB.instance
.put<dynamic>(boxName: walletId, key: chainArray, value: [address]);
} else {
// Make a deep copy of the existing list
final List<String> newArray = [];
addressArray
.forEach((dynamic _address) => newArray.add(_address as String));
newArray.add(address); // Add the address passed into the method
await DB.instance
.put<dynamic>(boxName: walletId, key: chainArray, value: newArray);
}
return isar_models.Address()
..derivationIndex = index
..value = address
..publicKey = []
..type = isar_models.AddressType.cryptonote
..subType = chain == 0
? isar_models.AddressSubType.receiving
: isar_models.AddressSubType.change;
}
Future<FeeObject> _getFees() async {
@ -947,7 +881,7 @@ class MoneroWallet extends CoinServiceAPI {
);
}
Future<TransactionData> _fetchTransactionData() async {
Future<void> _refreshTransactions() async {
await walletBase!.updateTransactions();
final transactions = walletBase?.transactionHistory!.transactions;
@ -965,123 +899,112 @@ class MoneroWallet extends CoinServiceAPI {
//
// final Set<String> cachedTxids = Set<String>.from(txidsList);
// sort thing stuff
// change to get Monero price
final priceData =
await _priceAPI.getPricesAnd24hChange(baseCurrency: _prefs.currency);
Decimal currentPrice = priceData[coin]?.item1 ?? Decimal.zero;
final List<Map<String, dynamic>> midSortedArray = [];
final List<isar_models.Transaction> txns = [];
if (transactions != null) {
for (var tx in transactions.entries) {
// cachedTxids.add(tx.value.id);
Logging.instance.log(
"${tx.value.accountIndex} ${tx.value.addressIndex} ${tx.value.amount} ${tx.value.date} "
"${tx.value.direction} ${tx.value.fee} ${tx.value.height} ${tx.value.id} ${tx.value.isPending} ${tx.value.key} "
"${tx.value.recipientAddress}, ${tx.value.additionalInfo} con:${tx.value.confirmations}"
" ${tx.value.keyIndex}",
level: LogLevel.Info);
final worthNow = (currentPrice *
Format.satoshisToAmount(
tx.value.amount!,
coin: coin,
))
.toStringAsFixed(2);
Map<String, dynamic> midSortedTx = {};
// // create final tx map
midSortedTx["txid"] = tx.value.id;
midSortedTx["confirmed_status"] = !tx.value.isPending &&
tx.value.confirmations! >= MINIMUM_CONFIRMATIONS;
midSortedTx["confirmations"] = tx.value.confirmations ?? 0;
midSortedTx["timestamp"] =
(tx.value.date.millisecondsSinceEpoch ~/ 1000);
midSortedTx["txType"] =
tx.value.direction == TransactionDirection.incoming
? "Received"
: "Sent";
midSortedTx["amount"] = tx.value.amount;
midSortedTx["worthNow"] = worthNow;
midSortedTx["worthAtBlockTimestamp"] = worthNow;
midSortedTx["fees"] = tx.value.fee;
// Logging.instance.log(
// "${tx.value.accountIndex} ${tx.value.addressIndex} ${tx.value.amount} ${tx.value.date} "
// "${tx.value.direction} ${tx.value.fee} ${tx.value.height} ${tx.value.id} ${tx.value.isPending} ${tx.value.key} "
// "${tx.value.recipientAddress}, ${tx.value.additionalInfo} con:${tx.value.confirmations}"
// " ${tx.value.keyIndex}",
// level: LogLevel.Info);
final int txHeight = tx.value.height ?? 0;
final txn = isar_models.Transaction();
txn.txid = tx.value.id;
txn.timestamp = (tx.value.date.millisecondsSinceEpoch ~/ 1000);
if (tx.value.direction == TransactionDirection.incoming) {
final addressInfo = tx.value.additionalInfo;
midSortedTx["address"] = walletBase?.getTransactionAddress(
addressInfo!['accountIndex'] as int,
addressInfo['addressIndex'] as int,
);
txn.address = walletBase?.getTransactionAddress(
addressInfo!['accountIndex'] as int,
addressInfo['addressIndex'] as int,
) ??
"";
txn.type = isar_models.TransactionType.incoming;
} else {
midSortedTx["address"] = "";
txn.address = "";
txn.type = isar_models.TransactionType.outgoing;
}
final int txHeight = tx.value.height ?? 0;
midSortedTx["height"] = txHeight;
// if (txHeight >= latestTxnBlockHeight) {
// latestTxnBlockHeight = txHeight;
// }
txn.amount = tx.value.amount ?? 0;
midSortedTx["aliens"] = <dynamic>[];
midSortedTx["inputSize"] = 0;
midSortedTx["outputSize"] = 0;
midSortedTx["inputs"] = <dynamic>[];
midSortedTx["outputs"] = <dynamic>[];
midSortedArray.add(midSortedTx);
// TODO: other subtypes
txn.subType = isar_models.TransactionSubType.none;
txn.fee = tx.value.fee ?? 0;
txn.height = txHeight;
txn.isCancelled = false;
txn.slateId = null;
txn.otherData = null;
txns.add(txn);
}
}
// sort by date ----
midSortedArray
.sort((a, b) => (b["timestamp"] as int) - (a["timestamp"] as int));
Logging.instance.log(midSortedArray, level: LogLevel.Info);
await isar.writeTxn(() async {
await isar.transactions.putAll(txns);
});
// buildDateTimeChunks
final Map<String, dynamic> result = {"dateTimeChunks": <dynamic>[]};
final dateArray = <dynamic>[];
for (int i = 0; i < midSortedArray.length; i++) {
final txObject = midSortedArray[i];
final date = extractDateFromTimestamp(txObject["timestamp"] as int);
final txTimeArray = [txObject["timestamp"], date];
if (dateArray.contains(txTimeArray[1])) {
result["dateTimeChunks"].forEach((dynamic chunk) {
if (extractDateFromTimestamp(chunk["timestamp"] as int) ==
txTimeArray[1]) {
if (chunk["transactions"] == null) {
chunk["transactions"] = <Map<String, dynamic>>[];
}
chunk["transactions"].add(txObject);
}
});
} else {
dateArray.add(txTimeArray[1]);
final chunk = {
"timestamp": txTimeArray[0],
"transactions": [txObject],
};
result["dateTimeChunks"].add(chunk);
}
}
// final transactionsMap = cachedTransactions?.getAllTransactions() ?? {};
final Map<String, Transaction> transactionsMap = {};
transactionsMap
.addAll(TransactionData.fromJson(result).getAllTransactions());
final txModel = TransactionData.fromMap(transactionsMap);
// await DB.instance.put<dynamic>(
// boxName: walletId,
// key: 'storedTxnDataHeight',
// value: latestTxnBlockHeight);
// await DB.instance.put<dynamic>(
// boxName: walletId, key: 'latest_tx_model', value: txModel);
// await DB.instance.put<dynamic>(
// boxName: walletId,
// key: 'cachedTxids',
// value: cachedTxids.toList(growable: false));
return txModel;
// // sort by date ----
// midSortedArray
// .sort((a, b) => (b["timestamp"] as int) - (a["timestamp"] as int));
// Logging.instance.log(midSortedArray, level: LogLevel.Info);
//
// // buildDateTimeChunks
// final Map<String, dynamic> result = {"dateTimeChunks": <dynamic>[]};
// final dateArray = <dynamic>[];
//
// for (int i = 0; i < midSortedArray.length; i++) {
// final txObject = midSortedArray[i];
// final date = extractDateFromTimestamp(txObject["timestamp"] as int);
// final txTimeArray = [txObject["timestamp"], date];
//
// if (dateArray.contains(txTimeArray[1])) {
// result["dateTimeChunks"].forEach((dynamic chunk) {
// if (extractDateFromTimestamp(chunk["timestamp"] as int) ==
// txTimeArray[1]) {
// if (chunk["transactions"] == null) {
// chunk["transactions"] = <Map<String, dynamic>>[];
// }
// chunk["transactions"].add(txObject);
// }
// });
// } else {
// dateArray.add(txTimeArray[1]);
// final chunk = {
// "timestamp": txTimeArray[0],
// "transactions": [txObject],
// };
// result["dateTimeChunks"].add(chunk);
// }
// }
//
// // final transactionsMap = cachedTransactions?.getAllTransactions() ?? {};
// final Map<String, Transaction> transactionsMap = {};
// transactionsMap
// .addAll(TransactionData.fromJson(result).getAllTransactions());
//
// final txModel = TransactionData.fromMap(transactionsMap);
//
// // await DB.instance.put<dynamic>(
// // boxName: walletId,
// // key: 'storedTxnDataHeight',
// // value: latestTxnBlockHeight);
// // await DB.instance.put<dynamic>(
// // boxName: walletId, key: 'latest_tx_model', value: txModel);
// // await DB.instance.put<dynamic>(
// // boxName: walletId,
// // key: 'cachedTxids',
// // value: cachedTxids.toList(growable: false));
//
// return txModel;
}
Future<String> _pathForWalletDir({
@ -1164,12 +1087,12 @@ class MoneroWallet extends CoinServiceAPI {
}
Future<void> _refreshTxData() async {
final txnData = await _fetchTransactionData();
final count = txnData.getAllTransactions().length;
await _refreshTransactions();
final count = await isar.transactions.count();
if (count > _txCount) {
_txCount = count;
_transactionData = Future(() => txnData);
await _updateBalance();
GlobalEventBus.instance.fire(
UpdatedInBackgroundEvent(
"New transaction data found in $walletId $walletName!",
@ -1293,23 +1216,21 @@ class MoneroWallet extends CoinServiceAPI {
}
// Check the new receiving index
String indexKey = "receivingIndex";
final curIndex =
DB.instance.get<dynamic>(boxName: walletId, key: indexKey) as int;
final currentReceiving = await _currentReceivingAddress;
final curIndex = currentReceiving!.derivationIndex;
if (highestIndex >= curIndex) {
// First increment the receiving index
await _incrementAddressIndexForChain(0);
final newReceivingIndex =
DB.instance.get<dynamic>(boxName: walletId, key: indexKey) as int;
final newReceivingIndex = curIndex + 1;
// Use new index to derive a new receiving address
final newReceivingAddress =
await _generateAddressForChain(0, newReceivingIndex);
// Add that new receiving address to the array of receiving addresses
await _addToAddressesArrayForChain(newReceivingAddress, 0);
_currentReceivingAddress = Future(() => newReceivingAddress);
// Add that new receiving address
await isar.writeTxn(() async {
await isar.addresses.put(newReceivingAddress);
});
}
} on SocketException catch (se, s) {
Logging.instance.log(
@ -1338,4 +1259,16 @@ class MoneroWallet extends CoinServiceAPI {
@override
// TODO: implement storedChainHeight
int get storedChainHeight => throw UnimplementedError();
@override
Balance get balance => _balance!;
Balance? _balance;
@override
Future<List<isar_models.Transaction>> get transactions =>
isar.transactions.where().sortByTimestampDesc().findAll();
@override
// TODO: implement utxos
Future<List<isar_models.UTXO>> get utxos => throw UnimplementedError();
}