stack_wallet/lib/services/coins/namecoin/namecoin_wallet.dart

3480 lines
119 KiB
Dart

/*
* This file is part of Stack Wallet.
*
* Copyright (c) 2023 Cypher Stack
* All Rights Reserved.
* The code is distributed under GPLv3 license, see LICENSE file for details.
* Generated by Cypher Stack on 2023-05-26
*
*/
import 'dart:async';
import 'dart:convert';
import 'dart:io';
import 'package:bech32/bech32.dart';
import 'package:bip32/bip32.dart' as bip32;
import 'package:bip39/bip39.dart' as bip39;
import 'package:bitcoindart/bitcoindart.dart';
import 'package:bs58check/bs58check.dart' as bs58check;
import 'package:crypto/crypto.dart';
import 'package:decimal/decimal.dart';
import 'package:flutter/foundation.dart';
import 'package:isar/isar.dart';
import 'package:stackwallet/db/isar/main_db.dart';
import 'package:stackwallet/electrumx_rpc/cached_electrumx_client.dart';
import 'package:stackwallet/electrumx_rpc/electrumx_client.dart';
import 'package:stackwallet/models/balance.dart';
import 'package:stackwallet/models/isar/models/isar_models.dart' as isar_models;
import 'package:stackwallet/models/paymint/fee_object_model.dart';
import 'package:stackwallet/models/signing_data.dart';
import 'package:stackwallet/services/coins/coin_service.dart';
import 'package:stackwallet/services/event_bus/events/global/node_connection_status_changed_event.dart';
import 'package:stackwallet/services/event_bus/events/global/refresh_percent_changed_event.dart';
import 'package:stackwallet/services/event_bus/events/global/updated_in_background_event.dart';
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/mixins/electrum_x_parsing.dart';
import 'package:stackwallet/services/mixins/wallet_cache.dart';
import 'package:stackwallet/services/mixins/wallet_db.dart';
import 'package:stackwallet/services/mixins/xpubable.dart';
import 'package:stackwallet/services/node_service.dart';
import 'package:stackwallet/services/transaction_notification_tracker.dart';
import 'package:stackwallet/utilities/amount/amount.dart';
import 'package:stackwallet/utilities/bip32_utils.dart';
import 'package:stackwallet/utilities/constants.dart';
import 'package:stackwallet/utilities/default_nodes.dart';
import 'package:stackwallet/utilities/enums/coin_enum.dart';
import 'package:stackwallet/utilities/enums/derive_path_type_enum.dart';
import 'package:stackwallet/utilities/enums/fee_rate_type_enum.dart';
import 'package:stackwallet/utilities/flutter_secure_storage_interface.dart';
import 'package:stackwallet/utilities/format.dart';
import 'package:stackwallet/utilities/logger.dart';
import 'package:stackwallet/utilities/prefs.dart';
import 'package:stackwallet/widgets/crypto_notifications.dart';
import 'package:tuple/tuple.dart';
import 'package:uuid/uuid.dart';
const int MINIMUM_CONFIRMATIONS = 2;
// Find real dust limit
final Amount DUST_LIMIT = Amount(
rawValue: BigInt.from(546),
fractionDigits: Coin.particl.decimals,
);
const String GENESIS_HASH_MAINNET =
"000000000062b72c5e2ceb45fbc8587e807c155b0da735e6483dfba2f0a9c770";
const String GENESIS_HASH_TESTNET =
"00000007199508e34a9ff81e6ec0c477a4cccff2a4767a8eee39c11db367b008";
String constructDerivePath({
required DerivePathType derivePathType,
required int networkWIF,
int account = 0,
required int chain,
required int index,
}) {
String coinType;
switch (networkWIF) {
case 0xb4: // nmc mainnet wif
coinType = "7"; // nmc mainnet
break;
default:
throw Exception("Invalid Namecoin network wif used!");
}
int purpose;
switch (derivePathType) {
case DerivePathType.bip44:
purpose = 44;
break;
case DerivePathType.bip49:
purpose = 49;
break;
case DerivePathType.bip84:
purpose = 84;
break;
default:
throw Exception("DerivePathType $derivePathType not supported");
}
return "m/$purpose'/$coinType'/$account'/$chain/$index";
}
class NamecoinWallet extends CoinServiceAPI
with
WalletCache,
WalletDB,
ElectrumXParsing
// , CoinControlInterface
implements
XPubAble {
NamecoinWallet({
required String walletId,
required String walletName,
required Coin coin,
required ElectrumXClient client,
required CachedElectrumXClient cachedClient,
required TransactionNotificationTracker tracker,
required SecureStorageInterface secureStore,
MainDB? mockableOverride,
}) {
txTracker = tracker;
_walletId = walletId;
_walletName = walletName;
_coin = coin;
_electrumXClient = client;
_cachedElectrumXClient = cachedClient;
_secureStore = secureStore;
initCache(walletId, coin);
initWalletDB(mockableOverride: mockableOverride);
// initCoinControlInterface(
// walletId: walletId,
// walletName: walletName,
// coin: coin,
// db: db,
// getChainHeight: () => chainHeight,
// refreshedBalanceCallback: (balance) async {
// _balance = balance;
// await updateCachedBalance(_balance!);
// },
// );
}
static const integrationTestFlag =
bool.fromEnvironment("IS_INTEGRATION_TEST");
final _prefs = Prefs.instance;
Timer? timer;
late final Coin _coin;
late final TransactionNotificationTracker txTracker;
NetworkType get _network {
switch (coin) {
case Coin.namecoin:
return namecoin;
default:
throw Exception("Invalid network type!");
}
}
@override
set isFavorite(bool markFavorite) {
_isFavorite = markFavorite;
updateCachedIsFavorite(markFavorite);
}
@override
bool get isFavorite => _isFavorite ??= getCachedIsFavorite();
bool? _isFavorite;
@override
Coin get coin => _coin;
@override
Future<List<isar_models.UTXO>> get utxos => db.getUTXOs(walletId).findAll();
@override
Future<List<isar_models.Transaction>> get transactions =>
db.getTransactions(walletId).sortByTimestampDesc().findAll();
@override
Future<String> get currentReceivingAddress async =>
(await _currentReceivingAddress).value;
Future<isar_models.Address> get _currentReceivingAddress async =>
(await db
.getAddresses(walletId)
.filter()
.typeEqualTo(isar_models.AddressType.p2wpkh)
.subTypeEqualTo(isar_models.AddressSubType.receiving)
.sortByDerivationIndexDesc()
.findFirst()) ??
await _generateAddressForChain(0, 0, DerivePathTypeExt.primaryFor(coin));
Future<String> get currentChangeAddress async =>
(await _currentChangeAddress).value;
Future<isar_models.Address> get _currentChangeAddress async =>
(await db
.getAddresses(walletId)
.filter()
.typeEqualTo(isar_models.AddressType.p2wpkh)
.subTypeEqualTo(isar_models.AddressSubType.change)
.sortByDerivationIndexDesc()
.findFirst()) ??
await _generateAddressForChain(1, 0, DerivePathTypeExt.primaryFor(coin));
@override
Future<void> exit() async {
_hasCalledExit = true;
timer?.cancel();
timer = null;
stopNetworkAlivePinging();
}
bool _hasCalledExit = false;
@override
bool get hasCalledExit => _hasCalledExit;
@override
Future<FeeObject> get fees => _feeObject ??= _getFees();
Future<FeeObject>? _feeObject;
@override
Future<int> get maxFee async {
final fee = (await fees).fast as String;
final satsFee = Decimal.parse(fee) *
Decimal.fromInt(Constants.satsPerCoin(coin).toInt());
return satsFee.floor().toBigInt().toInt();
}
@override
Future<List<String>> get mnemonic => _getMnemonicList();
@override
Future<String?> get mnemonicString =>
_secureStore.read(key: '${_walletId}_mnemonic');
@override
Future<String?> get mnemonicPassphrase => _secureStore.read(
key: '${_walletId}_mnemonicPassphrase',
);
Future<int> get chainHeight async {
try {
final result = await _electrumXClient.getBlockHeadTip();
final height = result["height"] as int;
await updateCachedChainHeight(height);
if (height > storedChainHeight) {
GlobalEventBus.instance.fire(
UpdatedInBackgroundEvent(
"Updated current chain height in $walletId $walletName!",
walletId,
),
);
}
return height;
} catch (e, s) {
Logging.instance.log("Exception caught in chainHeight: $e\n$s",
level: LogLevel.Error);
return storedChainHeight;
}
}
@override
int get storedChainHeight => getCachedChainHeight();
DerivePathType addressType({required String address}) {
Uint8List? decodeBase58;
Segwit? decodeBech32;
try {
decodeBase58 = bs58check.decode(address);
} catch (err) {
// Base58check decode fail
}
if (decodeBase58 != null) {
if (decodeBase58[0] == _network.pubKeyHash) {
// P2PKH
return DerivePathType.bip44;
}
if (decodeBase58[0] == _network.scriptHash) {
// P2SH
return DerivePathType.bip49;
}
throw ArgumentError('Invalid version or Network mismatch');
} else {
try {
decodeBech32 = segwit.decode(address, namecoin.bech32!);
} catch (err) {
// Bech32 decode fail
}
if (_network.bech32 != decodeBech32!.hrp) {
throw ArgumentError('Invalid prefix or Network mismatch');
}
if (decodeBech32.version != 0) {
throw ArgumentError('Invalid address version');
}
// P2WPKH
return DerivePathType.bip84;
}
}
bool longMutex = false;
@override
Future<void> recoverFromMnemonic({
required String mnemonic,
String? mnemonicPassphrase,
required int maxUnusedAddressGap,
required int maxNumberOfIndexesToCheck,
required int height,
}) async {
longMutex = true;
final start = DateTime.now();
try {
Logging.instance.log("IS_INTEGRATION_TEST: $integrationTestFlag",
level: LogLevel.Info);
if (!integrationTestFlag) {
try {
final features = await electrumXClient
.getServerFeatures()
.timeout(const Duration(seconds: 3));
Logging.instance.log("features: $features", level: LogLevel.Info);
switch (coin) {
case Coin.namecoin:
if (features['genesis_hash'] != GENESIS_HASH_MAINNET) {
throw Exception("genesis hash does not match main net!");
}
break;
default:
throw Exception(
"Attempted to generate a NamecoinWallet using a non namecoin coin type: ${coin.name}");
}
} catch (e, s) {
Logging.instance.log("$e/n$s", level: LogLevel.Info);
}
}
// check to make sure we aren't overwriting a mnemonic
// this should never fail
if ((await mnemonicString) != null ||
(await this.mnemonicPassphrase) != null) {
longMutex = false;
throw Exception("Attempted to overwrite mnemonic on restore!");
}
await _secureStore.write(
key: '${_walletId}_mnemonic', value: mnemonic.trim());
await _secureStore.write(
key: '${_walletId}_mnemonicPassphrase',
value: mnemonicPassphrase ?? "",
);
await _recoverWalletFromBIP32SeedPhrase(
mnemonic: mnemonic.trim(),
mnemonicPassphrase: mnemonicPassphrase ?? "",
maxUnusedAddressGap: maxUnusedAddressGap,
maxNumberOfIndexesToCheck: maxNumberOfIndexesToCheck,
);
} catch (e, s) {
Logging.instance.log(
"Exception rethrown from recoverFromMnemonic(): $e\n$s",
level: LogLevel.Error);
longMutex = false;
rethrow;
}
longMutex = false;
final end = DateTime.now();
Logging.instance.log(
"$walletName recovery time: ${end.difference(start).inMilliseconds} millis",
level: LogLevel.Info);
}
Future<Map<String, dynamic>> _checkGaps(
int maxNumberOfIndexesToCheck,
int maxUnusedAddressGap,
int txCountBatchSize,
bip32.BIP32 root,
DerivePathType type,
int chain) async {
List<isar_models.Address> addressArray = [];
int returningIndex = -1;
Map<String, Map<String, String>> derivations = {};
int gapCounter = 0;
for (int index = 0;
index < maxNumberOfIndexesToCheck && gapCounter < maxUnusedAddressGap;
index += txCountBatchSize) {
List<String> iterationsAddressArray = [];
Logging.instance.log(
"index: $index, \t GapCounter $chain ${type.name}: $gapCounter",
level: LogLevel.Info);
final _id = "k_$index";
Map<String, String> txCountCallArgs = {};
final Map<String, dynamic> receivingNodes = {};
for (int j = 0; j < txCountBatchSize; j++) {
final derivePath = constructDerivePath(
derivePathType: type,
networkWIF: root.network.wif,
chain: chain,
index: index + j,
);
final node = await Bip32Utils.getBip32NodeFromRoot(root, derivePath);
String addressString;
isar_models.AddressType addrType;
switch (type) {
case DerivePathType.bip44:
addressString = P2PKH(
data: PaymentData(pubkey: node.publicKey),
network: _network)
.data
.address!;
addrType = isar_models.AddressType.p2pkh;
break;
case DerivePathType.bip49:
addressString = P2SH(
data: PaymentData(
redeem: P2WPKH(
data: PaymentData(pubkey: node.publicKey),
network: _network,
overridePrefix: namecoin.bech32!)
.data),
network: _network)
.data
.address!;
addrType = isar_models.AddressType.p2sh;
break;
case DerivePathType.bip84:
addressString = P2WPKH(
network: _network,
data: PaymentData(pubkey: node.publicKey),
overridePrefix: namecoin.bech32!)
.data
.address!;
addrType = isar_models.AddressType.p2wpkh;
break;
default:
throw Exception("DerivePathType $type not supported");
}
final address = isar_models.Address(
walletId: walletId,
subType: chain == 0
? isar_models.AddressSubType.receiving
: isar_models.AddressSubType.change,
type: addrType,
publicKey: node.publicKey,
value: addressString,
derivationIndex: index + j,
derivationPath: isar_models.DerivationPath()..value = derivePath,
);
receivingNodes.addAll({
"${_id}_$j": {
"node": node,
"address": address,
}
});
txCountCallArgs.addAll({
"${_id}_$j": addressString,
});
}
// get address tx counts
final counts = await _getBatchTxCount(addresses: txCountCallArgs);
// check and add appropriate addresses
for (int k = 0; k < txCountBatchSize; k++) {
int count = counts["${_id}_$k"]!;
if (count > 0) {
final node = receivingNodes["${_id}_$k"];
final address = node["address"] as isar_models.Address;
// add address to array
addressArray.add(address);
iterationsAddressArray.add(address.value);
// set current index
returningIndex = index + k;
// reset counter
gapCounter = 0;
// add info to derivations
derivations[address.value] = {
"pubKey": Format.uint8listToString(
(node["node"] as bip32.BIP32).publicKey),
"wif": (node["node"] as bip32.BIP32).toWIF(),
};
}
// increase counter when no tx history found
if (count == 0) {
gapCounter++;
}
}
// cache all the transactions while waiting for the current function to finish.
unawaited(getTransactionCacheEarly(iterationsAddressArray));
}
return {
"addressArray": addressArray,
"index": returningIndex,
"derivations": derivations
};
}
Future<void> getTransactionCacheEarly(List<String> allAddresses) async {
try {
final List<Map<String, dynamic>> allTxHashes =
await _fetchHistory(allAddresses);
for (final txHash in allTxHashes) {
try {
unawaited(cachedElectrumXClient.getTransaction(
txHash: txHash["tx_hash"] as String,
verbose: true,
coin: coin,
));
} catch (e) {
continue;
}
}
} catch (e) {
//
}
}
Future<void> _recoverWalletFromBIP32SeedPhrase({
required String mnemonic,
required String mnemonicPassphrase,
int maxUnusedAddressGap = 20,
int maxNumberOfIndexesToCheck = 1000,
bool isRescan = false,
}) async {
longMutex = true;
Map<String, Map<String, String>> p2pkhReceiveDerivations = {};
Map<String, Map<String, String>> p2shReceiveDerivations = {};
Map<String, Map<String, String>> p2wpkhReceiveDerivations = {};
Map<String, Map<String, String>> p2pkhChangeDerivations = {};
Map<String, Map<String, String>> p2shChangeDerivations = {};
Map<String, Map<String, String>> p2wpkhChangeDerivations = {};
final root = await Bip32Utils.getBip32Root(
mnemonic,
mnemonicPassphrase,
_network,
);
List<isar_models.Address> p2pkhReceiveAddressArray = [];
List<isar_models.Address> p2shReceiveAddressArray = [];
List<isar_models.Address> p2wpkhReceiveAddressArray = [];
int p2pkhReceiveIndex = -1;
int p2shReceiveIndex = -1;
int p2wpkhReceiveIndex = -1;
List<isar_models.Address> p2pkhChangeAddressArray = [];
List<isar_models.Address> p2shChangeAddressArray = [];
List<isar_models.Address> p2wpkhChangeAddressArray = [];
int p2pkhChangeIndex = -1;
int p2shChangeIndex = -1;
int p2wpkhChangeIndex = -1;
// actual size is 36 due to p2pkh, p2sh, and p2wpkh so 12x3
const txCountBatchSize = 12;
try {
// receiving addresses
Logging.instance
.log("checking receiving addresses...", level: LogLevel.Info);
final resultReceive44 = _checkGaps(maxNumberOfIndexesToCheck,
maxUnusedAddressGap, txCountBatchSize, root, DerivePathType.bip44, 0);
final resultReceive49 = _checkGaps(maxNumberOfIndexesToCheck,
maxUnusedAddressGap, txCountBatchSize, root, DerivePathType.bip49, 0);
final resultReceive84 = _checkGaps(maxNumberOfIndexesToCheck,
maxUnusedAddressGap, txCountBatchSize, root, DerivePathType.bip84, 0);
Logging.instance
.log("checking change addresses...", level: LogLevel.Info);
// change addresses
final resultChange44 = _checkGaps(maxNumberOfIndexesToCheck,
maxUnusedAddressGap, txCountBatchSize, root, DerivePathType.bip44, 1);
final resultChange49 = _checkGaps(maxNumberOfIndexesToCheck,
maxUnusedAddressGap, txCountBatchSize, root, DerivePathType.bip49, 1);
final resultChange84 = _checkGaps(maxNumberOfIndexesToCheck,
maxUnusedAddressGap, txCountBatchSize, root, DerivePathType.bip84, 1);
await Future.wait([
resultReceive44,
resultReceive49,
resultReceive84,
resultChange44,
resultChange49,
resultChange84
]);
p2pkhReceiveAddressArray =
(await resultReceive44)['addressArray'] as List<isar_models.Address>;
p2pkhReceiveIndex = (await resultReceive44)['index'] as int;
p2pkhReceiveDerivations = (await resultReceive44)['derivations']
as Map<String, Map<String, String>>;
p2shReceiveAddressArray =
(await resultReceive49)['addressArray'] as List<isar_models.Address>;
p2shReceiveIndex = (await resultReceive49)['index'] as int;
p2shReceiveDerivations = (await resultReceive49)['derivations']
as Map<String, Map<String, String>>;
p2wpkhReceiveAddressArray =
(await resultReceive84)['addressArray'] as List<isar_models.Address>;
p2wpkhReceiveIndex = (await resultReceive84)['index'] as int;
p2wpkhReceiveDerivations = (await resultReceive84)['derivations']
as Map<String, Map<String, String>>;
p2pkhChangeAddressArray =
(await resultChange44)['addressArray'] as List<isar_models.Address>;
p2pkhChangeIndex = (await resultChange44)['index'] as int;
p2pkhChangeDerivations = (await resultChange44)['derivations']
as Map<String, Map<String, String>>;
p2shChangeAddressArray =
(await resultChange49)['addressArray'] as List<isar_models.Address>;
p2shChangeIndex = (await resultChange49)['index'] as int;
p2shChangeDerivations = (await resultChange49)['derivations']
as Map<String, Map<String, String>>;
p2wpkhChangeAddressArray =
(await resultChange84)['addressArray'] as List<isar_models.Address>;
p2wpkhChangeIndex = (await resultChange84)['index'] as int;
p2wpkhChangeDerivations = (await resultChange84)['derivations']
as Map<String, Map<String, String>>;
// save the derivations (if any)
if (p2pkhReceiveDerivations.isNotEmpty) {
await addDerivations(
chain: 0,
derivePathType: DerivePathType.bip44,
derivationsToAdd: p2pkhReceiveDerivations);
}
if (p2shReceiveDerivations.isNotEmpty) {
await addDerivations(
chain: 0,
derivePathType: DerivePathType.bip49,
derivationsToAdd: p2shReceiveDerivations);
}
if (p2wpkhReceiveDerivations.isNotEmpty) {
await addDerivations(
chain: 0,
derivePathType: DerivePathType.bip84,
derivationsToAdd: p2wpkhReceiveDerivations);
}
if (p2pkhChangeDerivations.isNotEmpty) {
await addDerivations(
chain: 1,
derivePathType: DerivePathType.bip44,
derivationsToAdd: p2pkhChangeDerivations);
}
if (p2shChangeDerivations.isNotEmpty) {
await addDerivations(
chain: 1,
derivePathType: DerivePathType.bip49,
derivationsToAdd: p2shChangeDerivations);
}
if (p2wpkhChangeDerivations.isNotEmpty) {
await addDerivations(
chain: 1,
derivePathType: DerivePathType.bip84,
derivationsToAdd: p2wpkhChangeDerivations);
}
// If restoring a wallet that never received any funds, then set receivingArray manually
// If we didn't do this, it'd store an empty array
if (p2pkhReceiveIndex == -1) {
final address =
await _generateAddressForChain(0, 0, DerivePathType.bip44);
p2pkhReceiveAddressArray.add(address);
}
if (p2shReceiveIndex == -1) {
final address =
await _generateAddressForChain(0, 0, DerivePathType.bip49);
p2shReceiveAddressArray.add(address);
}
if (p2wpkhReceiveIndex == -1) {
final address =
await _generateAddressForChain(0, 0, DerivePathType.bip84);
p2wpkhReceiveAddressArray.add(address);
}
// If restoring a wallet that never sent any funds with change, then set changeArray
// manually. If we didn't do this, it'd store an empty array.
if (p2pkhChangeIndex == -1) {
final address =
await _generateAddressForChain(1, 0, DerivePathType.bip44);
p2pkhChangeAddressArray.add(address);
}
if (p2shChangeIndex == -1) {
final address =
await _generateAddressForChain(1, 0, DerivePathType.bip49);
p2shChangeAddressArray.add(address);
}
if (p2wpkhChangeIndex == -1) {
final address =
await _generateAddressForChain(1, 0, DerivePathType.bip84);
p2wpkhChangeAddressArray.add(address);
}
if (isRescan) {
await db.updateOrPutAddresses([
...p2wpkhReceiveAddressArray,
...p2wpkhChangeAddressArray,
...p2pkhReceiveAddressArray,
...p2pkhChangeAddressArray,
...p2shReceiveAddressArray,
...p2shChangeAddressArray,
]);
} else {
await db.putAddresses([
...p2wpkhReceiveAddressArray,
...p2wpkhChangeAddressArray,
...p2pkhReceiveAddressArray,
...p2pkhChangeAddressArray,
...p2shReceiveAddressArray,
...p2shChangeAddressArray,
]);
}
await _updateUTXOs();
await Future.wait([
updateCachedId(walletId),
updateCachedIsFavorite(false),
]);
longMutex = false;
} catch (e, s) {
Logging.instance.log(
"Exception rethrown from _recoverWalletFromBIP32SeedPhrase(): $e\n$s",
level: LogLevel.Error);
longMutex = false;
rethrow;
}
}
Future<bool> refreshIfThereIsNewData() async {
if (longMutex) return false;
if (_hasCalledExit) return false;
Logging.instance.log("refreshIfThereIsNewData", level: LogLevel.Info);
try {
bool needsRefresh = false;
Set<String> txnsToCheck = {};
for (final String txid in txTracker.pendings) {
if (!txTracker.wasNotifiedConfirmed(txid)) {
txnsToCheck.add(txid);
}
}
for (String txid in txnsToCheck) {
final txn = await electrumXClient.getTransaction(txHash: txid);
int confirmations = txn["confirmations"] as int? ?? 0;
bool isUnconfirmed = confirmations < MINIMUM_CONFIRMATIONS;
if (!isUnconfirmed) {
// unconfirmedTxs = {};
needsRefresh = true;
break;
}
}
if (!needsRefresh) {
var allOwnAddresses = await _fetchAllOwnAddresses();
List<Map<String, dynamic>> allTxs = await _fetchHistory(
allOwnAddresses.map((e) => e.value).toList(growable: false));
for (Map<String, dynamic> transaction in allTxs) {
final txid = transaction['tx_hash'] as String;
if ((await db
.getTransactions(walletId)
.filter()
.txidMatches(txid)
.findFirst()) ==
null) {
Logging.instance.log(
" txid not found in address history already ${transaction['tx_hash']}",
level: LogLevel.Info);
needsRefresh = true;
break;
}
}
}
return needsRefresh;
} catch (e, s) {
Logging.instance.log(
"Exception caught in refreshIfThereIsNewData: $e\n$s",
level: LogLevel.Error);
rethrow;
}
}
Future<void> getAllTxsToWatch() async {
if (_hasCalledExit) return;
List<isar_models.Transaction> unconfirmedTxnsToNotifyPending = [];
List<isar_models.Transaction> unconfirmedTxnsToNotifyConfirmed = [];
final currentChainHeight = await chainHeight;
final txCount = await db.getTransactions(walletId).count();
const paginateLimit = 50;
for (int i = 0; i < txCount; i += paginateLimit) {
final transactions = await db
.getTransactions(walletId)
.offset(i)
.limit(paginateLimit)
.findAll();
for (final tx in transactions) {
if (tx.isConfirmed(currentChainHeight, MINIMUM_CONFIRMATIONS)) {
// get all transactions that were notified as pending but not as confirmed
if (txTracker.wasNotifiedPending(tx.txid) &&
!txTracker.wasNotifiedConfirmed(tx.txid)) {
unconfirmedTxnsToNotifyConfirmed.add(tx);
}
} else {
// get all transactions that were not notified as pending yet
if (!txTracker.wasNotifiedPending(tx.txid)) {
unconfirmedTxnsToNotifyPending.add(tx);
}
}
}
}
// notify on unconfirmed transactions
for (final tx in unconfirmedTxnsToNotifyPending) {
final confirmations = tx.getConfirmations(currentChainHeight);
if (tx.type == isar_models.TransactionType.incoming) {
CryptoNotificationsEventBus.instance.fire(
CryptoNotificationEvent(
title: "Incoming transaction",
walletId: walletId,
date: DateTime.fromMillisecondsSinceEpoch(tx.timestamp * 1000),
shouldWatchForUpdates: confirmations < MINIMUM_CONFIRMATIONS,
txid: tx.txid,
confirmations: confirmations,
requiredConfirmations: MINIMUM_CONFIRMATIONS,
walletName: walletName,
coin: coin,
),
);
await txTracker.addNotifiedPending(tx.txid);
} else if (tx.type == isar_models.TransactionType.outgoing) {
CryptoNotificationsEventBus.instance.fire(
CryptoNotificationEvent(
title: "Sending transaction",
walletId: walletId,
date: DateTime.fromMillisecondsSinceEpoch(tx.timestamp * 1000),
shouldWatchForUpdates: confirmations < MINIMUM_CONFIRMATIONS,
txid: tx.txid,
confirmations: confirmations,
requiredConfirmations: MINIMUM_CONFIRMATIONS,
walletName: walletName,
coin: coin,
),
);
await txTracker.addNotifiedPending(tx.txid);
}
}
// notify on confirmed
for (final tx in unconfirmedTxnsToNotifyConfirmed) {
if (tx.type == isar_models.TransactionType.incoming) {
CryptoNotificationsEventBus.instance.fire(
CryptoNotificationEvent(
title: "Incoming transaction confirmed",
walletId: walletId,
date: DateTime.fromMillisecondsSinceEpoch(tx.timestamp * 1000),
shouldWatchForUpdates: false,
txid: tx.txid,
requiredConfirmations: MINIMUM_CONFIRMATIONS,
walletName: walletName,
coin: coin,
),
);
await txTracker.addNotifiedConfirmed(tx.txid);
} else if (tx.type == isar_models.TransactionType.outgoing) {
CryptoNotificationsEventBus.instance.fire(
CryptoNotificationEvent(
title: "Outgoing transaction confirmed",
walletId: walletId,
date: DateTime.fromMillisecondsSinceEpoch(tx.timestamp * 1000),
shouldWatchForUpdates: false,
txid: tx.txid,
requiredConfirmations: MINIMUM_CONFIRMATIONS,
walletName: walletName,
coin: coin,
),
);
await txTracker.addNotifiedConfirmed(tx.txid);
}
}
}
bool _shouldAutoSync = false;
@override
bool get shouldAutoSync => _shouldAutoSync;
@override
set shouldAutoSync(bool shouldAutoSync) {
if (_shouldAutoSync != shouldAutoSync) {
_shouldAutoSync = shouldAutoSync;
if (!shouldAutoSync) {
timer?.cancel();
timer = null;
stopNetworkAlivePinging();
} else {
startNetworkAlivePinging();
refresh();
}
}
}
@override
bool get isRefreshing => refreshMutex;
bool refreshMutex = false;
//TODO Show percentages properly/more consistently
/// Refreshes display data for the wallet
@override
Future<void> refresh() async {
if (refreshMutex) {
Logging.instance.log("$walletId $walletName refreshMutex denied",
level: LogLevel.Info);
return;
} else {
refreshMutex = true;
}
try {
GlobalEventBus.instance.fire(
WalletSyncStatusChangedEvent(
WalletSyncStatus.syncing,
walletId,
coin,
),
);
GlobalEventBus.instance.fire(RefreshPercentChangedEvent(0.0, walletId));
GlobalEventBus.instance.fire(RefreshPercentChangedEvent(0.1, walletId));
final currentHeight = await chainHeight;
const storedHeight = 1; //await storedChainHeight;
Logging.instance
.log("chain height: $currentHeight", level: LogLevel.Info);
Logging.instance
.log("cached height: $storedHeight", level: LogLevel.Info);
if (currentHeight != storedHeight) {
GlobalEventBus.instance.fire(RefreshPercentChangedEvent(0.2, walletId));
await _checkChangeAddressForTransactions();
GlobalEventBus.instance.fire(RefreshPercentChangedEvent(0.3, walletId));
await _checkCurrentReceivingAddressesForTransactions();
final fetchFuture = _refreshTransactions();
final utxosRefreshFuture = _updateUTXOs();
GlobalEventBus.instance
.fire(RefreshPercentChangedEvent(0.50, walletId));
final feeObj = _getFees();
GlobalEventBus.instance
.fire(RefreshPercentChangedEvent(0.60, walletId));
GlobalEventBus.instance
.fire(RefreshPercentChangedEvent(0.70, walletId));
_feeObject = Future(() => feeObj);
await utxosRefreshFuture;
GlobalEventBus.instance
.fire(RefreshPercentChangedEvent(0.80, walletId));
await fetchFuture;
await getAllTxsToWatch();
GlobalEventBus.instance
.fire(RefreshPercentChangedEvent(0.90, walletId));
}
refreshMutex = false;
GlobalEventBus.instance.fire(RefreshPercentChangedEvent(1.0, walletId));
GlobalEventBus.instance.fire(
WalletSyncStatusChangedEvent(
WalletSyncStatus.synced,
walletId,
coin,
),
);
if (shouldAutoSync) {
timer ??= Timer.periodic(const Duration(seconds: 30), (timer) async {
Logging.instance.log(
"Periodic refresh check for $walletId $walletName in object instance: $hashCode",
level: LogLevel.Info);
// chain height check currently broken
// if ((await chainHeight) != (await storedChainHeight)) {
if (await refreshIfThereIsNewData()) {
await refresh();
GlobalEventBus.instance.fire(UpdatedInBackgroundEvent(
"New data found in $walletId $walletName in background!",
walletId));
}
// }
});
}
} catch (error, strace) {
refreshMutex = false;
GlobalEventBus.instance.fire(
NodeConnectionStatusChangedEvent(
NodeConnectionStatus.disconnected,
walletId,
coin,
),
);
GlobalEventBus.instance.fire(
WalletSyncStatusChangedEvent(
WalletSyncStatus.unableToSync,
walletId,
coin,
),
);
Logging.instance.log(
"Caught exception in refreshWalletData(): $error\n$strace",
level: LogLevel.Error);
}
}
@override
Future<Map<String, dynamic>> prepareSend({
required String address,
required Amount amount,
Map<String, dynamic>? args,
}) async {
try {
final feeRateType = args?["feeRate"];
final customSatsPerVByte = args?["satsPerVByte"] as int?;
final feeRateAmount = args?["feeRateAmount"];
final utxos = args?["UTXOs"] as Set<isar_models.UTXO>?;
if (customSatsPerVByte != null) {
// check for send all
bool isSendAll = false;
if (amount == balance.spendable) {
isSendAll = true;
}
final bool coinControl = utxos != null;
final result = await coinSelection(
satoshiAmountToSend: amount.raw.toInt(),
selectedTxFeeRate: -1,
satsPerVByte: customSatsPerVByte,
recipientAddress: address,
isSendAll: isSendAll,
utxos: utxos?.toList(),
coinControl: coinControl,
);
Logging.instance
.log("PREPARE SEND RESULT: $result", level: LogLevel.Info);
if (result is int) {
switch (result) {
case 1:
throw Exception("Insufficient balance!");
case 2:
throw Exception("Insufficient funds to pay for transaction fee!");
default:
throw Exception("Transaction failed with error code $result");
}
} else {
final hex = result["hex"];
if (hex is String) {
final fee = result["fee"] as int;
final vSize = result["vSize"] as int;
Logging.instance.log("txHex: $hex", level: LogLevel.Info);
Logging.instance.log("fee: $fee", level: LogLevel.Info);
Logging.instance.log("vsize: $vSize", level: LogLevel.Info);
// fee should never be less than vSize sanity check
if (fee < vSize) {
throw Exception(
"Error in fee calculation: Transaction fee cannot be less than vSize");
}
return result as Map<String, dynamic>;
} else {
throw Exception("sent hex is not a String!!!");
}
}
} else if (feeRateType is FeeRateType || feeRateAmount is int) {
late final int rate;
if (feeRateType is FeeRateType) {
int fee = 0;
final feeObject = await fees;
switch (feeRateType) {
case FeeRateType.fast:
fee = feeObject.fast;
break;
case FeeRateType.average:
fee = feeObject.medium;
break;
case FeeRateType.slow:
fee = feeObject.slow;
break;
default:
throw ArgumentError("Invalid use of custom fee");
}
rate = fee;
} else {
rate = feeRateAmount as int;
}
// check for send all
bool isSendAll = false;
if (amount == balance.spendable) {
isSendAll = true;
}
final bool coinControl = utxos != null;
final txData = await coinSelection(
satoshiAmountToSend: amount.raw.toInt(),
selectedTxFeeRate: rate,
recipientAddress: address,
isSendAll: isSendAll,
utxos: utxos?.toList(),
coinControl: coinControl,
);
Logging.instance.log("prepare send: $txData", level: LogLevel.Info);
try {
if (txData is int) {
switch (txData) {
case 1:
throw Exception("Insufficient balance!");
case 2:
throw Exception(
"Insufficient funds to pay for transaction fee!");
default:
throw Exception("Transaction failed with error code $txData");
}
} else {
final hex = txData["hex"];
if (hex is String) {
final fee = txData["fee"] as int;
final vSize = txData["vSize"] as int;
Logging.instance
.log("prepared txHex: $hex", level: LogLevel.Info);
Logging.instance.log("prepared fee: $fee", level: LogLevel.Info);
Logging.instance
.log("prepared vSize: $vSize", level: LogLevel.Info);
// fee should never be less than vSize sanity check
if (fee < vSize) {
throw Exception(
"Error in fee calculation: Transaction fee cannot be less than vSize");
}
return txData as Map<String, dynamic>;
} else {
throw Exception("prepared hex is not a String!!!");
}
}
} catch (e, s) {
Logging.instance.log("Exception rethrown from prepareSend(): $e\n$s",
level: LogLevel.Error);
rethrow;
}
} else {
throw ArgumentError("Invalid fee rate argument provided!");
}
} catch (e, s) {
Logging.instance.log("Exception rethrown from prepareSend(): $e\n$s",
level: LogLevel.Error);
rethrow;
}
}
@override
Future<String> confirmSend({required Map<String, dynamic> txData}) async {
try {
Logging.instance.log("confirmSend txData: $txData", level: LogLevel.Info);
final hex = txData["hex"] as String;
final txHash = await _electrumXClient.broadcastTransaction(rawTx: hex);
Logging.instance.log("Sent txHash: $txHash", level: LogLevel.Info);
final utxos = txData["usedUTXOs"] as List<isar_models.UTXO>;
// mark utxos as used
await db.putUTXOs(utxos.map((e) => e.copyWith(used: true)).toList());
return txHash;
} catch (e, s) {
Logging.instance.log("Exception rethrown from confirmSend(): $e\n$s",
level: LogLevel.Error);
rethrow;
}
}
@override
Future<bool> testNetworkConnection() async {
try {
final result = await _electrumXClient.ping();
return result;
} catch (_) {
return false;
}
}
Timer? _networkAliveTimer;
void startNetworkAlivePinging() {
// call once on start right away
_periodicPingCheck();
// then periodically check
_networkAliveTimer = Timer.periodic(
Constants.networkAliveTimerDuration,
(_) async {
_periodicPingCheck();
},
);
}
void _periodicPingCheck() async {
bool hasNetwork = await testNetworkConnection();
if (_isConnected != hasNetwork) {
NodeConnectionStatus status = hasNetwork
? NodeConnectionStatus.connected
: NodeConnectionStatus.disconnected;
GlobalEventBus.instance
.fire(NodeConnectionStatusChangedEvent(status, walletId, coin));
_isConnected = hasNetwork;
if (hasNetwork) {
unawaited(refresh());
}
}
}
void stopNetworkAlivePinging() {
_networkAliveTimer?.cancel();
_networkAliveTimer = null;
}
bool _isConnected = false;
@override
bool get isConnected => _isConnected;
@override
Future<void> initializeNew(
({String mnemonicPassphrase, int wordCount})? data,
) async {
Logging.instance
.log("Generating new ${coin.prettyName} wallet.", level: LogLevel.Info);
if (getCachedId() != null) {
throw Exception(
"Attempted to initialize a new wallet using an existing wallet ID!");
}
await _prefs.init();
try {
await _generateNewWallet(data);
} catch (e, s) {
Logging.instance.log("Exception rethrown from initializeNew(): $e\n$s",
level: LogLevel.Fatal);
rethrow;
}
await Future.wait([
updateCachedId(walletId),
updateCachedIsFavorite(false),
]);
}
@override
Future<void> initializeExisting() async {
Logging.instance.log("initializeExisting() ${coin.prettyName} wallet.",
level: LogLevel.Info);
if (getCachedId() == null) {
throw Exception(
"Attempted to initialize an existing wallet using an unknown wallet ID!");
}
await _prefs.init();
// await _checkCurrentChangeAddressesForTransactions();
// await _checkCurrentReceivingAddressesForTransactions();
}
// hack to add tx to txData before refresh completes
// required based on current app architecture where we don't properly store
// transactions locally in a good way
@override
Future<void> updateSentCachedTxData(Map<String, dynamic> txData) async {
final transaction = isar_models.Transaction(
walletId: walletId,
txid: txData["txid"] as String,
timestamp: DateTime.now().millisecondsSinceEpoch ~/ 1000,
type: isar_models.TransactionType.outgoing,
subType: isar_models.TransactionSubType.none,
// precision may be lost here hence the following amountString
amount: (txData["recipientAmt"] as Amount).raw.toInt(),
amountString: (txData["recipientAmt"] as Amount).toJsonString(),
fee: txData["fee"] as int,
height: null,
isCancelled: false,
isLelantus: false,
otherData: null,
slateId: null,
nonce: null,
inputs: [],
outputs: [],
numberOfMessages: null,
);
final address = txData["address"] is String
? await db.getAddress(walletId, txData["address"] as String)
: null;
await db.addNewTransactionData(
[
Tuple2(transaction, address),
],
walletId,
);
}
@override
bool validateAddress(String address) {
return Address.validateAddress(address, _network, namecoin.bech32!);
}
@override
String get walletId => _walletId;
late final String _walletId;
@override
String get walletName => _walletName;
late String _walletName;
// setter for updating on rename
@override
set walletName(String newName) => _walletName = newName;
late ElectrumXClient _electrumXClient;
ElectrumXClient get electrumXClient => _electrumXClient;
late CachedElectrumXClient _cachedElectrumXClient;
CachedElectrumXClient get cachedElectrumXClient => _cachedElectrumXClient;
late SecureStorageInterface _secureStore;
@override
Future<void> updateNode(bool shouldRefresh) async {
final failovers = NodeService(secureStorageInterface: _secureStore)
.failoverNodesFor(coin: coin)
.map((e) => ElectrumXNode(
address: e.host,
port: e.port,
name: e.name,
id: e.id,
useSSL: e.useSSL,
))
.toList();
final newNode = await getCurrentNode();
_electrumXClient = ElectrumXClient.from(
node: newNode,
prefs: _prefs,
failovers: failovers,
);
_cachedElectrumXClient = CachedElectrumXClient.from(
electrumXClient: _electrumXClient,
);
if (shouldRefresh) {
unawaited(refresh());
}
}
Future<List<String>> _getMnemonicList() async {
final _mnemonicString = await mnemonicString;
if (_mnemonicString == null) {
return [];
}
final List<String> data = _mnemonicString.split(' ');
return data;
}
Future<ElectrumXNode> getCurrentNode() async {
final node = NodeService(secureStorageInterface: _secureStore)
.getPrimaryNodeFor(coin: coin) ??
DefaultNodes.getNodeFor(coin);
return ElectrumXNode(
address: node.host,
port: node.port,
name: node.name,
useSSL: node.useSSL,
id: node.id,
);
}
Future<List<isar_models.Address>> _fetchAllOwnAddresses() async {
final allAddresses = await db
.getAddresses(walletId)
.filter()
.not()
.typeEqualTo(isar_models.AddressType.nonWallet)
.and()
.group((q) => q
.subTypeEqualTo(isar_models.AddressSubType.receiving)
.or()
.subTypeEqualTo(isar_models.AddressSubType.change))
.findAll();
// final List<String> allAddresses = [];
// final receivingAddresses = DB.instance.get<dynamic>(
// boxName: walletId, key: 'receivingAddressesP2WPKH') as List<dynamic>;
// final changeAddresses = DB.instance.get<dynamic>(
// boxName: walletId, key: 'changeAddressesP2WPKH') as List<dynamic>;
// final receivingAddressesP2PKH = DB.instance.get<dynamic>(
// boxName: walletId, key: 'receivingAddressesP2PKH') as List<dynamic>;
// final changeAddressesP2PKH =
// DB.instance.get<dynamic>(boxName: walletId, key: 'changeAddressesP2PKH')
// as List<dynamic>;
// final receivingAddressesP2SH = DB.instance.get<dynamic>(
// boxName: walletId, key: 'receivingAddressesP2SH') as List<dynamic>;
// final changeAddressesP2SH =
// DB.instance.get<dynamic>(boxName: walletId, key: 'changeAddressesP2SH')
// as List<dynamic>;
//
// for (var i = 0; i < receivingAddresses.length; i++) {
// if (!allAddresses.contains(receivingAddresses[i])) {
// allAddresses.add(receivingAddresses[i] as String);
// }
// }
// for (var i = 0; i < changeAddresses.length; i++) {
// if (!allAddresses.contains(changeAddresses[i])) {
// allAddresses.add(changeAddresses[i] as String);
// }
// }
// for (var i = 0; i < receivingAddressesP2PKH.length; i++) {
// if (!allAddresses.contains(receivingAddressesP2PKH[i])) {
// allAddresses.add(receivingAddressesP2PKH[i] as String);
// }
// }
// for (var i = 0; i < changeAddressesP2PKH.length; i++) {
// if (!allAddresses.contains(changeAddressesP2PKH[i])) {
// allAddresses.add(changeAddressesP2PKH[i] as String);
// }
// }
// for (var i = 0; i < receivingAddressesP2SH.length; i++) {
// if (!allAddresses.contains(receivingAddressesP2SH[i])) {
// allAddresses.add(receivingAddressesP2SH[i] as String);
// }
// }
// for (var i = 0; i < changeAddressesP2SH.length; i++) {
// if (!allAddresses.contains(changeAddressesP2SH[i])) {
// allAddresses.add(changeAddressesP2SH[i] as String);
// }
// }
return allAddresses;
}
Future<FeeObject> _getFees() async {
try {
//TODO adjust numbers for different speeds?
const int f = 1, m = 5, s = 20;
final fast = await electrumXClient.estimateFee(blocks: f);
final medium = await electrumXClient.estimateFee(blocks: m);
final slow = await electrumXClient.estimateFee(blocks: s);
final feeObject = FeeObject(
numberOfBlocksFast: f,
numberOfBlocksAverage: m,
numberOfBlocksSlow: s,
fast: Amount.fromDecimal(
fast,
fractionDigits: coin.decimals,
).raw.toInt(),
medium: Amount.fromDecimal(
medium,
fractionDigits: coin.decimals,
).raw.toInt(),
slow: Amount.fromDecimal(
slow,
fractionDigits: coin.decimals,
).raw.toInt(),
);
Logging.instance.log("fetched fees: $feeObject", level: LogLevel.Info);
return feeObject;
} catch (e) {
Logging.instance
.log("Exception rethrown from _getFees(): $e", level: LogLevel.Error);
rethrow;
}
}
Future<void> _generateNewWallet(
({String mnemonicPassphrase, int wordCount})? data,
) async {
Logging.instance
.log("IS_INTEGRATION_TEST: $integrationTestFlag", level: LogLevel.Info);
if (!integrationTestFlag) {
try {
final features = await electrumXClient.getServerFeatures();
Logging.instance.log("features: $features", level: LogLevel.Info);
switch (coin) {
case Coin.namecoin:
if (features['genesis_hash'] != GENESIS_HASH_MAINNET) {
throw Exception("genesis hash does not match main net!");
}
break;
default:
throw Exception(
"Attempted to generate a NamecoinWallet using a non namecoin coin type: ${coin.name}");
}
} catch (e, s) {
Logging.instance.log("$e/n$s", level: LogLevel.Info);
}
}
// this should never fail
if ((await mnemonicString) != null || (await mnemonicPassphrase) != null) {
throw Exception(
"Attempted to overwrite mnemonic on generate new wallet!");
}
final int strength;
if (data == null || data.wordCount == 12) {
strength = 128;
} else if (data.wordCount == 24) {
strength = 256;
} else {
throw Exception("Invalid word count");
}
await _secureStore.write(
key: '${_walletId}_mnemonic',
value: bip39.generateMnemonic(strength: strength));
await _secureStore.write(
key: '${_walletId}_mnemonicPassphrase',
value: data?.mnemonicPassphrase ?? "",
);
// Generate and add addresses to relevant arrays
final initialAddresses = await Future.wait([
// P2WPKH
_generateAddressForChain(0, 0, DerivePathType.bip84),
_generateAddressForChain(1, 0, DerivePathType.bip84),
// P2PKH
_generateAddressForChain(0, 0, DerivePathType.bip44),
_generateAddressForChain(1, 0, DerivePathType.bip44),
// P2SH
_generateAddressForChain(0, 0, DerivePathType.bip49),
_generateAddressForChain(1, 0, DerivePathType.bip49),
]);
await db.putAddresses(initialAddresses);
Logging.instance.log("_generateNewWalletFinished", level: LogLevel.Info);
}
/// Generates a new internal or external chain address for the wallet using a BIP84, BIP44, or BIP49 derivation path.
/// [chain] - Use 0 for receiving (external), 1 for change (internal). Should not be any other value!
/// [index] - This can be any integer >= 0
Future<isar_models.Address> _generateAddressForChain(
int chain,
int index,
DerivePathType derivePathType,
) async {
final _mnemonic = await mnemonicString;
final _mnemonicPassphrase = await mnemonicPassphrase;
if (_mnemonicPassphrase == null) {
Logging.instance.log(
"Exception in _generateAddressForChain: mnemonic passphrase null, possible migration issue; if using internal builds, delete wallet and restore from seed, if using a release build, please file bug report",
level: LogLevel.Error);
}
final derivePath = constructDerivePath(
derivePathType: derivePathType,
networkWIF: _network.wif,
chain: chain,
index: index,
);
final node = await Bip32Utils.getBip32Node(
_mnemonic!,
_mnemonicPassphrase!,
_network,
derivePath,
);
final data = PaymentData(pubkey: node.publicKey);
String address;
isar_models.AddressType addrType;
switch (derivePathType) {
case DerivePathType.bip44:
address = P2PKH(data: data, network: _network).data.address!;
addrType = isar_models.AddressType.p2pkh;
break;
case DerivePathType.bip49:
address = P2SH(
data: PaymentData(
redeem: P2WPKH(
data: data,
network: _network,
overridePrefix: namecoin.bech32!)
.data),
network: _network)
.data
.address!;
addrType = isar_models.AddressType.p2sh;
break;
case DerivePathType.bip84:
address = P2WPKH(
network: _network, data: data, overridePrefix: namecoin.bech32!)
.data
.address!;
addrType = isar_models.AddressType.p2wpkh;
break;
default:
throw Exception("DerivePathType must not be null.");
}
// add generated address & info to derivations
await addDerivation(
chain: chain,
address: address,
pubKey: Format.uint8listToString(node.publicKey),
wif: node.toWIF(),
derivePathType: derivePathType,
);
return isar_models.Address(
walletId: walletId,
derivationIndex: index,
derivationPath: isar_models.DerivationPath()..value = derivePath,
value: address,
publicKey: node.publicKey,
type: addrType,
subType: chain == 0
? isar_models.AddressSubType.receiving
: isar_models.AddressSubType.change,
);
}
/// 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,
DerivePathType derivePathType,
) async {
final subType = chain == 0 // Here, we assume that chain == 1 if it isn't 0
? isar_models.AddressSubType.receiving
: isar_models.AddressSubType.change;
isar_models.AddressType type;
isar_models.Address? address;
switch (derivePathType) {
case DerivePathType.bip44:
type = isar_models.AddressType.p2pkh;
break;
case DerivePathType.bip49:
type = isar_models.AddressType.p2sh;
break;
case DerivePathType.bip84:
type = isar_models.AddressType.p2wpkh;
break;
default:
throw Exception(
"DerivePathType null or unsupported (${DerivePathType.bip44})");
}
address = await db
.getAddresses(walletId)
.filter()
.typeEqualTo(type)
.subTypeEqualTo(subType)
.sortByDerivationIndexDesc()
.findFirst();
return address!.value;
}
String _buildDerivationStorageKey({
required int chain,
required DerivePathType derivePathType,
}) {
String key;
String chainId = chain == 0 ? "receive" : "change";
switch (derivePathType) {
case DerivePathType.bip44:
key = "${walletId}_${chainId}DerivationsP2PKH";
break;
case DerivePathType.bip49:
key = "${walletId}_${chainId}DerivationsP2SH";
break;
case DerivePathType.bip84:
key = "${walletId}_${chainId}DerivationsP2WPKH";
break;
default:
throw Exception("DerivePathType $derivePathType not supported");
}
return key;
}
Future<Map<String, dynamic>> _fetchDerivations({
required int chain,
required DerivePathType derivePathType,
}) async {
// build lookup key
final key = _buildDerivationStorageKey(
chain: chain, derivePathType: derivePathType);
// fetch current derivations
final derivationsString = await _secureStore.read(key: key);
return Map<String, dynamic>.from(
jsonDecode(derivationsString ?? "{}") as Map);
}
/// Add a single derivation to the local secure storage for [chain] and
/// [derivePathType] where [chain] must either be 1 for change or 0 for receive.
/// This will overwrite a previous entry where the address of the new derivation
/// matches a derivation currently stored.
Future<void> addDerivation({
required int chain,
required String address,
required String pubKey,
required String wif,
required DerivePathType derivePathType,
}) async {
// build lookup key
final key = _buildDerivationStorageKey(
chain: chain, derivePathType: derivePathType);
// fetch current derivations
final derivationsString = await _secureStore.read(key: key);
final derivations =
Map<String, dynamic>.from(jsonDecode(derivationsString ?? "{}") as Map);
// add derivation
derivations[address] = {
"pubKey": pubKey,
"wif": wif,
};
// save derivations
final newReceiveDerivationsString = jsonEncode(derivations);
await _secureStore.write(key: key, value: newReceiveDerivationsString);
}
/// Add multiple derivations to the local secure storage for [chain] and
/// [derivePathType] where [chain] must either be 1 for change or 0 for receive.
/// This will overwrite any previous entries where the address of the new derivation
/// matches a derivation currently stored.
/// The [derivationsToAdd] must be in the format of:
/// {
/// addressA : {
/// "pubKey": <the pubKey string>,
/// "wif": <the wif string>,
/// },
/// addressB : {
/// "pubKey": <the pubKey string>,
/// "wif": <the wif string>,
/// },
/// }
Future<void> addDerivations({
required int chain,
required DerivePathType derivePathType,
required Map<String, dynamic> derivationsToAdd,
}) async {
// build lookup key
final key = _buildDerivationStorageKey(
chain: chain, derivePathType: derivePathType);
// fetch current derivations
final derivationsString = await _secureStore.read(key: key);
final derivations =
Map<String, dynamic>.from(jsonDecode(derivationsString ?? "{}") as Map);
// add derivation
derivations.addAll(derivationsToAdd);
// save derivations
final newReceiveDerivationsString = jsonEncode(derivations);
await _secureStore.write(key: key, value: newReceiveDerivationsString);
}
Future<void> _updateUTXOs() async {
final allAddresses = await _fetchAllOwnAddresses();
try {
final fetchedUtxoList = <List<Map<String, dynamic>>>[];
final Map<int, Map<String, List<dynamic>>> batches = {};
const batchSizeMax = 100;
int batchNumber = 0;
for (int i = 0; i < allAddresses.length; i++) {
if (batches[batchNumber] == null) {
batches[batchNumber] = {};
}
final scripthash =
_convertToScriptHash(allAddresses[i].value, _network);
// print("SCRIPT_HASH_FOR_ADDRESS ${allAddresses[i]} IS $scripthash");
batches[batchNumber]!.addAll({
scripthash: [scripthash]
});
if (i % batchSizeMax == batchSizeMax - 1) {
batchNumber++;
}
}
for (int i = 0; i < batches.length; i++) {
final response =
await _electrumXClient.getBatchUTXOs(args: batches[i]!);
for (final entry in response.entries) {
if (entry.value.isNotEmpty) {
fetchedUtxoList.add(entry.value);
}
}
}
final List<isar_models.UTXO> outputArray = [];
for (int i = 0; i < fetchedUtxoList.length; i++) {
for (int j = 0; j < fetchedUtxoList[i].length; j++) {
final jsonUTXO = fetchedUtxoList[i][j];
final txn = await cachedElectrumXClient.getTransaction(
txHash: jsonUTXO["tx_hash"] as String,
verbose: true,
coin: coin,
);
final vout = jsonUTXO["tx_pos"] as int;
final outputs = txn["vout"] as List;
String? utxoOwnerAddress;
// get UTXO owner address
for (final output in outputs) {
if (output["n"] == vout) {
utxoOwnerAddress =
output["scriptPubKey"]?["addresses"]?[0] as String? ??
output["scriptPubKey"]?["address"] as String?;
}
}
final utxo = isar_models.UTXO(
walletId: walletId,
txid: txn["txid"] as String,
vout: vout,
value: jsonUTXO["value"] as int,
name: "",
isBlocked: false,
blockedReason: null,
isCoinbase: txn["is_coinbase"] as bool? ?? false,
blockHash: txn["blockhash"] as String?,
blockHeight: jsonUTXO["height"] as int?,
blockTime: txn["blocktime"] as int?,
address: utxoOwnerAddress,
);
outputArray.add(utxo);
}
}
Logging.instance
.log('Outputs fetched: $outputArray', level: LogLevel.Info);
await db.updateUTXOs(walletId, outputArray);
// finally update balance
await _updateBalance();
} catch (e, s) {
Logging.instance
.log("Output fetch unsuccessful: $e\n$s", level: LogLevel.Error);
}
}
Future<void> _updateBalance() async {
// await refreshBalance();
}
@override
Balance get balance => _balance ??= getCachedBalance();
Balance? _balance;
// /// Takes in a list of UtxoObjects and adds a name (dependent on object index within list)
// /// and checks for the txid associated with the utxo being blocked and marks it accordingly.
// /// Now also checks for output labeling.
// Future<void> _sortOutputs(List<UtxoObject> utxos) async {
// final blockedHashArray =
// DB.instance.get<dynamic>(boxName: walletId, key: 'blocked_tx_hashes')
// as List<dynamic>?;
// final List<String> lst = [];
// if (blockedHashArray != null) {
// for (var hash in blockedHashArray) {
// lst.add(hash as String);
// }
// }
// final labels =
// DB.instance.get<dynamic>(boxName: walletId, key: 'labels') as Map? ??
// {};
//
// outputsList = [];
//
// for (var i = 0; i < utxos.length; i++) {
// if (labels[utxos[i].txid] != null) {
// utxos[i].txName = labels[utxos[i].txid] as String? ?? "";
// } else {
// utxos[i].txName = 'Output #$i';
// }
//
// if (utxos[i].status.confirmed == false) {
// outputsList.add(utxos[i]);
// } else {
// if (lst.contains(utxos[i].txid)) {
// utxos[i].blocked = true;
// outputsList.add(utxos[i]);
// } else if (!lst.contains(utxos[i].txid)) {
// outputsList.add(utxos[i]);
// }
// }
// }
// }
Future<int> getTxCount({required String address}) async {
String? scripthash;
try {
scripthash = _convertToScriptHash(address, _network);
final transactions =
await electrumXClient.getHistory(scripthash: scripthash);
return transactions.length;
} catch (e) {
Logging.instance.log(
"Exception rethrown in _getTxCount(address: $address, scripthash: $scripthash): $e",
level: LogLevel.Error);
rethrow;
}
}
Future<Map<String, int>> _getBatchTxCount({
required Map<String, String> addresses,
}) async {
try {
final Map<String, List<dynamic>> args = {};
// print("Address $addresses");
for (final entry in addresses.entries) {
args[entry.key] = [_convertToScriptHash(entry.value, _network)];
}
// print("Args ${jsonEncode(args)}");
final response = await electrumXClient.getBatchHistory(args: args);
// print("Response ${jsonEncode(response)}");
final Map<String, int> result = {};
for (final entry in response.entries) {
result[entry.key] = entry.value.length;
}
return result;
} catch (e, s) {
Logging.instance.log(
"Exception rethrown in _getBatchTxCount(address: $addresses: $e\n$s",
level: LogLevel.Error);
rethrow;
}
}
Future<void> _checkReceivingAddressForTransactions() async {
try {
final currentReceiving = await _currentReceivingAddress;
final int txCount = await getTxCount(address: currentReceiving.value);
Logging.instance.log(
'Number of txs for current receiving address $currentReceiving: $txCount',
level: LogLevel.Info);
if (txCount >= 1 || currentReceiving.derivationIndex < 0) {
// First increment the receiving index
final newReceivingIndex = currentReceiving.derivationIndex + 1;
// Use new index to derive a new receiving address
final newReceivingAddress = await _generateAddressForChain(
0, newReceivingIndex, DerivePathTypeExt.primaryFor(coin));
final existing = await db
.getAddresses(walletId)
.filter()
.valueEqualTo(newReceivingAddress.value)
.findFirst();
if (existing == null) {
// Add that new change address
await db.putAddress(newReceivingAddress);
} else {
// we need to update the address
await db.updateAddress(existing, newReceivingAddress);
}
// keep checking until address with no tx history is set as current
await _checkReceivingAddressForTransactions();
}
} catch (e, s) {
Logging.instance.log(
"Exception rethrown from _checkReceivingAddressForTransactions(${DerivePathTypeExt.primaryFor(coin)}): $e\n$s",
level: LogLevel.Error);
rethrow;
}
}
Future<void> _checkChangeAddressForTransactions() async {
try {
final currentChange = await _currentChangeAddress;
final int txCount = await getTxCount(address: currentChange.value);
Logging.instance.log(
'Number of txs for current change address $currentChange: $txCount',
level: LogLevel.Info);
if (txCount >= 1 || currentChange.derivationIndex < 0) {
// First increment the change index
final newChangeIndex = currentChange.derivationIndex + 1;
// Use new index to derive a new change address
final newChangeAddress = await _generateAddressForChain(
1, newChangeIndex, DerivePathTypeExt.primaryFor(coin));
final existing = await db
.getAddresses(walletId)
.filter()
.valueEqualTo(newChangeAddress.value)
.findFirst();
if (existing == null) {
// Add that new change address
await db.putAddress(newChangeAddress);
} else {
// we need to update the address
await db.updateAddress(existing, newChangeAddress);
}
// keep checking until address with no tx history is set as current
await _checkChangeAddressForTransactions();
}
} on SocketException catch (se, s) {
Logging.instance.log(
"SocketException caught in _checkReceivingAddressForTransactions(${DerivePathTypeExt.primaryFor(coin)}): $se\n$s",
level: LogLevel.Error);
return;
} catch (e, s) {
Logging.instance.log(
"Exception rethrown from _checkReceivingAddressForTransactions(${DerivePathTypeExt.primaryFor(coin)}): $e\n$s",
level: LogLevel.Error);
rethrow;
}
}
Future<void> _checkCurrentReceivingAddressesForTransactions() async {
try {
// for (final type in DerivePathType.values) {
await _checkReceivingAddressForTransactions();
// }
} catch (e, s) {
Logging.instance.log(
"Exception rethrown from _checkCurrentReceivingAddressesForTransactions(): $e\n$s",
level: LogLevel.Error);
rethrow;
}
}
/// public wrapper because dart can't test private...
Future<void> checkCurrentReceivingAddressesForTransactions() async {
if (Platform.environment["FLUTTER_TEST"] == "true") {
try {
return _checkCurrentReceivingAddressesForTransactions();
} catch (_) {
rethrow;
}
}
}
Future<void> _checkCurrentChangeAddressesForTransactions() async {
try {
// for (final type in DerivePathType.values) {
await _checkChangeAddressForTransactions();
// }
} catch (e, s) {
Logging.instance.log(
"Exception rethrown from _checkCurrentChangeAddressesForTransactions(): $e\n$s",
level: LogLevel.Error);
rethrow;
}
}
/// public wrapper because dart can't test private...
Future<void> checkCurrentChangeAddressesForTransactions() async {
if (Platform.environment["FLUTTER_TEST"] == "true") {
try {
return _checkCurrentChangeAddressesForTransactions();
} catch (_) {
rethrow;
}
}
}
/// attempts to convert a string to a valid scripthash
///
/// Returns the scripthash or throws an exception on invalid namecoin address
String _convertToScriptHash(String namecoinAddress, NetworkType network) {
try {
final output = Address.addressToOutputScript(
namecoinAddress, network, namecoin.bech32!);
final hash = sha256.convert(output.toList(growable: false)).toString();
final chars = hash.split("");
final reversedPairs = <String>[];
var i = chars.length - 1;
while (i > 0) {
reversedPairs.add(chars[i - 1]);
reversedPairs.add(chars[i]);
i -= 2;
}
return reversedPairs.join("");
} catch (e) {
rethrow;
}
}
Future<List<Map<String, dynamic>>> _fetchHistory(
List<String> allAddresses) async {
try {
List<Map<String, dynamic>> allTxHashes = [];
final Map<int, Map<String, List<dynamic>>> batches = {};
final Map<String, String> requestIdToAddressMap = {};
const batchSizeMax = 100;
int batchNumber = 0;
for (int i = 0; i < allAddresses.length; i++) {
if (batches[batchNumber] == null) {
batches[batchNumber] = {};
}
final scripthash = _convertToScriptHash(allAddresses[i], _network);
final id = Logger.isTestEnv ? "$i" : const Uuid().v1();
requestIdToAddressMap[id] = allAddresses[i];
batches[batchNumber]!.addAll({
id: [scripthash]
});
if (i % batchSizeMax == batchSizeMax - 1) {
batchNumber++;
}
}
for (int i = 0; i < batches.length; i++) {
final response =
await _electrumXClient.getBatchHistory(args: batches[i]!);
for (final entry in response.entries) {
for (int j = 0; j < entry.value.length; j++) {
entry.value[j]["address"] = requestIdToAddressMap[entry.key];
if (!allTxHashes.contains(entry.value[j])) {
allTxHashes.add(entry.value[j]);
}
}
}
}
return allTxHashes;
} catch (e, s) {
Logging.instance.log("_fetchHistory: $e\n$s", level: LogLevel.Error);
rethrow;
}
}
bool _duplicateTxCheck(
List<Map<String, dynamic>> allTransactions, String txid) {
for (int i = 0; i < allTransactions.length; i++) {
if (allTransactions[i]["txid"] == txid) {
return true;
}
}
return false;
}
Future<List<Map<String, dynamic>>> fastFetch(List<String> allTxHashes) async {
List<Map<String, dynamic>> allTransactions = [];
const futureLimit = 30;
List<Future<Map<String, dynamic>>> transactionFutures = [];
int currentFutureCount = 0;
for (final txHash in allTxHashes) {
Future<Map<String, dynamic>> transactionFuture =
cachedElectrumXClient.getTransaction(
txHash: txHash,
verbose: true,
coin: coin,
);
transactionFutures.add(transactionFuture);
currentFutureCount++;
if (currentFutureCount > futureLimit) {
currentFutureCount = 0;
await Future.wait(transactionFutures);
for (final fTx in transactionFutures) {
final tx = await fTx;
allTransactions.add(tx);
}
}
}
if (currentFutureCount != 0) {
currentFutureCount = 0;
await Future.wait(transactionFutures);
for (final fTx in transactionFutures) {
final tx = await fTx;
allTransactions.add(tx);
}
}
return allTransactions;
}
Future<void> _refreshTransactions() async {
final List<isar_models.Address> allAddresses =
await _fetchAllOwnAddresses();
final List<Map<String, dynamic>> allTxHashes =
await _fetchHistory(allAddresses.map((e) => e.value).toList());
Set<String> hashes = {};
for (var element in allTxHashes) {
hashes.add(element['tx_hash'] as String);
}
await fastFetch(hashes.toList());
List<Map<String, dynamic>> allTransactions = [];
final currentHeight = await chainHeight;
for (final txHash in allTxHashes) {
final storedTx = await db
.getTransactions(walletId)
.filter()
.txidEqualTo(txHash["tx_hash"] as String)
.findFirst();
if (storedTx == null ||
!storedTx.isConfirmed(currentHeight, MINIMUM_CONFIRMATIONS)) {
final tx = await cachedElectrumXClient.getTransaction(
txHash: txHash["tx_hash"] as String,
verbose: true,
coin: coin,
);
// Logging.instance.log("TRANSACTION: ${jsonEncode(tx)}");
if (!_duplicateTxCheck(allTransactions, tx["txid"] as String)) {
tx["address"] = await db
.getAddresses(walletId)
.filter()
.valueEqualTo(txHash["address"] as String)
.findFirst();
tx["height"] = txHash["height"];
allTransactions.add(tx);
}
}
}
// Logging.instance.log("addAddresses: $allAddresses", level: LogLevel.Info);
// Logging.instance.log("allTxHashes: $allTxHashes", level: LogLevel.Info);
//
// Logging.instance.log("allTransactions length: ${allTransactions.length}",
// level: LogLevel.Info);
Set<String> vHashes = {};
for (final txObject in allTransactions) {
for (int i = 0; i < (txObject["vin"] as List).length; i++) {
final input = txObject["vin"]![i] as Map;
final prevTxid = input["txid"] as String;
vHashes.add(prevTxid);
}
}
await fastFetch(vHashes.toList());
final List<Tuple2<isar_models.Transaction, isar_models.Address>> txnsData =
[];
for (final txObject in allTransactions) {
final data = await parseTransaction(
txObject,
cachedElectrumXClient,
allAddresses,
coin,
MINIMUM_CONFIRMATIONS,
walletId,
);
txnsData.add(data);
}
await db.addNewTransactionData(txnsData, walletId);
// quick hack to notify manager to call notifyListeners if
// transactions changed
if (txnsData.isNotEmpty) {
GlobalEventBus.instance.fire(
UpdatedInBackgroundEvent(
"Transactions updated/added for: $walletId $walletName ",
walletId,
),
);
}
}
int estimateTxFee({required int vSize, required int feeRatePerKB}) {
return vSize * (feeRatePerKB / 1000).ceil();
}
/// The coinselection algorithm decides whether or not the user is eligible to make the transaction
/// with [satoshiAmountToSend] and [selectedTxFeeRate]. If so, it will call buildTrasaction() and return
/// a map containing the tx hex along with other important information. If not, then it will return
/// an integer (1 or 2)
dynamic coinSelection({
required int satoshiAmountToSend,
required int selectedTxFeeRate,
required String recipientAddress,
required bool coinControl,
required bool isSendAll,
int? satsPerVByte,
int additionalOutputs = 0,
List<isar_models.UTXO>? utxos,
}) async {
Logging.instance
.log("Starting coinSelection ----------", level: LogLevel.Info);
final List<isar_models.UTXO> availableOutputs = utxos ?? await this.utxos;
final currentChainHeight = await chainHeight;
final List<isar_models.UTXO> spendableOutputs = [];
int spendableSatoshiValue = 0;
// Build list of spendable outputs and totaling their satoshi amount
for (final utxo in availableOutputs) {
if (utxo.isBlocked == false &&
utxo.isConfirmed(currentChainHeight, MINIMUM_CONFIRMATIONS) &&
utxo.used != true) {
spendableOutputs.add(utxo);
spendableSatoshiValue += utxo.value;
}
}
if (coinControl) {
if (spendableOutputs.length < availableOutputs.length) {
throw ArgumentError("Attempted to use an unavailable utxo");
}
}
// don't care about sorting if using all utxos
if (!coinControl) {
// sort spendable by age (oldest first)
spendableOutputs.sort((a, b) => b.blockTime!.compareTo(a.blockTime!));
}
Logging.instance.log("spendableOutputs.length: ${spendableOutputs.length}",
level: LogLevel.Info);
Logging.instance
.log("spendableOutputs: $spendableOutputs", level: LogLevel.Info);
Logging.instance.log("spendableSatoshiValue: $spendableSatoshiValue",
level: LogLevel.Info);
Logging.instance
.log("satoshiAmountToSend: $satoshiAmountToSend", level: LogLevel.Info);
// If the amount the user is trying to send is smaller than the amount that they have spendable,
// then return 1, which indicates that they have an insufficient balance.
if (spendableSatoshiValue < satoshiAmountToSend) {
return 1;
// If the amount the user wants to send is exactly equal to the amount they can spend, then return
// 2, which indicates that they are not leaving enough over to pay the transaction fee
} else if (spendableSatoshiValue == satoshiAmountToSend && !isSendAll) {
return 2;
}
// If neither of these statements pass, we assume that the user has a spendable balance greater
// than the amount they're attempting to send. Note that this value still does not account for
// the added transaction fee, which may require an extra input and will need to be checked for
// later on.
// Possible situation right here
int satoshisBeingUsed = 0;
int inputsBeingConsumed = 0;
List<isar_models.UTXO> utxoObjectsToUse = [];
if (!coinControl) {
for (var i = 0;
satoshisBeingUsed < satoshiAmountToSend &&
i < spendableOutputs.length;
i++) {
utxoObjectsToUse.add(spendableOutputs[i]);
satoshisBeingUsed += spendableOutputs[i].value;
inputsBeingConsumed += 1;
}
for (int i = 0;
i < additionalOutputs &&
inputsBeingConsumed < spendableOutputs.length;
i++) {
utxoObjectsToUse.add(spendableOutputs[inputsBeingConsumed]);
satoshisBeingUsed += spendableOutputs[inputsBeingConsumed].value;
inputsBeingConsumed += 1;
}
} else {
satoshisBeingUsed = spendableSatoshiValue;
utxoObjectsToUse = spendableOutputs;
inputsBeingConsumed = spendableOutputs.length;
}
Logging.instance
.log("satoshisBeingUsed: $satoshisBeingUsed", level: LogLevel.Info);
Logging.instance
.log("inputsBeingConsumed: $inputsBeingConsumed", level: LogLevel.Info);
Logging.instance
.log('utxoObjectsToUse: $utxoObjectsToUse', level: LogLevel.Info);
// numberOfOutputs' length must always be equal to that of recipientsArray and recipientsAmtArray
List<String> recipientsArray = [recipientAddress];
List<int> recipientsAmtArray = [satoshiAmountToSend];
// gather required signing data
final utxoSigningData = await fetchBuildTxData(utxoObjectsToUse);
if (isSendAll) {
Logging.instance
.log("Attempting to send all $coin", level: LogLevel.Info);
final int vSizeForOneOutput = (await buildTransaction(
utxoSigningData: utxoSigningData,
recipients: [recipientAddress],
satoshiAmounts: [satoshisBeingUsed - 1],
))["vSize"] as int;
int feeForOneOutput = satsPerVByte != null
? (satsPerVByte * vSizeForOneOutput)
: estimateTxFee(
vSize: vSizeForOneOutput,
feeRatePerKB: selectedTxFeeRate,
);
if (satsPerVByte == null) {
final int roughEstimate = roughFeeEstimate(
spendableOutputs.length,
1,
selectedTxFeeRate,
).raw.toInt();
if (feeForOneOutput < roughEstimate) {
feeForOneOutput = roughEstimate;
}
}
final int amount = satoshiAmountToSend - feeForOneOutput;
dynamic txn = await buildTransaction(
utxoSigningData: utxoSigningData,
recipients: recipientsArray,
satoshiAmounts: [amount],
);
Map<String, dynamic> transactionObject = {
"hex": txn["hex"],
"recipient": recipientsArray[0],
"recipientAmt": Amount(
rawValue: BigInt.from(amount),
fractionDigits: coin.decimals,
),
"fee": feeForOneOutput,
"vSize": txn["vSize"],
"usedUTXOs": utxoSigningData.map((e) => e.utxo).toList(),
};
return transactionObject;
}
final int vSizeForOneOutput = (await buildTransaction(
utxoSigningData: utxoSigningData,
recipients: [recipientAddress],
satoshiAmounts: [satoshisBeingUsed - 1],
))["vSize"] as int;
final int vSizeForTwoOutPuts = (await buildTransaction(
utxoSigningData: utxoSigningData,
recipients: [
recipientAddress,
await _getCurrentAddressForChain(1, DerivePathTypeExt.primaryFor(coin)),
],
satoshiAmounts: [
satoshiAmountToSend,
satoshisBeingUsed - satoshiAmountToSend - 1
], // dust limit is the minimum amount a change output should be
))["vSize"] as int;
// Assume 1 output, only for recipient and no change
final feeForOneOutput = satsPerVByte != null
? (satsPerVByte * vSizeForOneOutput)
: estimateTxFee(
vSize: vSizeForOneOutput,
feeRatePerKB: selectedTxFeeRate,
);
// Assume 2 outputs, one for recipient and one for change
final feeForTwoOutputs = satsPerVByte != null
? (satsPerVByte * vSizeForTwoOutPuts)
: estimateTxFee(
vSize: vSizeForTwoOutPuts,
feeRatePerKB: selectedTxFeeRate,
);
Logging.instance
.log("feeForTwoOutputs: $feeForTwoOutputs", level: LogLevel.Info);
Logging.instance
.log("feeForOneOutput: $feeForOneOutput", level: LogLevel.Info);
if (satoshisBeingUsed - satoshiAmountToSend > feeForOneOutput) {
if (satoshisBeingUsed - satoshiAmountToSend >
feeForOneOutput + DUST_LIMIT.raw.toInt()) {
// Here, we know that theoretically, we may be able to include another output(change) but we first need to
// factor in the value of this output in satoshis.
int changeOutputSize =
satoshisBeingUsed - satoshiAmountToSend - feeForTwoOutputs;
// We check to see if the user can pay for the new transaction with 2 outputs instead of one. If they can and
// the second output's size > DUST_LIMIT satoshis, we perform the mechanics required to properly generate and use a new
// change address.
if (changeOutputSize > DUST_LIMIT.raw.toInt() &&
satoshisBeingUsed - satoshiAmountToSend - changeOutputSize ==
feeForTwoOutputs) {
// generate new change address if current change address has been used
await _checkChangeAddressForTransactions();
final String newChangeAddress = await _getCurrentAddressForChain(
1, DerivePathTypeExt.primaryFor(coin));
int feeBeingPaid =
satoshisBeingUsed - satoshiAmountToSend - changeOutputSize;
recipientsArray.add(newChangeAddress);
recipientsAmtArray.add(changeOutputSize);
// At this point, we have the outputs we're going to use, the amounts to send along with which addresses
// we intend to send these amounts to. We have enough to send instructions to build the transaction.
Logging.instance.log('2 outputs in tx', level: LogLevel.Info);
Logging.instance
.log('Input size: $satoshisBeingUsed', level: LogLevel.Info);
Logging.instance.log('Recipient output size: $satoshiAmountToSend',
level: LogLevel.Info);
Logging.instance.log('Change Output Size: $changeOutputSize',
level: LogLevel.Info);
Logging.instance.log(
'Difference (fee being paid): $feeBeingPaid sats',
level: LogLevel.Info);
Logging.instance
.log('Estimated fee: $feeForTwoOutputs', level: LogLevel.Info);
dynamic txn = await buildTransaction(
utxoSigningData: utxoSigningData,
recipients: recipientsArray,
satoshiAmounts: recipientsAmtArray,
);
// make sure minimum fee is accurate if that is being used
if (txn["vSize"] - feeBeingPaid == 1) {
int changeOutputSize =
satoshisBeingUsed - satoshiAmountToSend - (txn["vSize"] as int);
feeBeingPaid =
satoshisBeingUsed - satoshiAmountToSend - changeOutputSize;
recipientsAmtArray.removeLast();
recipientsAmtArray.add(changeOutputSize);
Logging.instance.log('Adjusted Input size: $satoshisBeingUsed',
level: LogLevel.Info);
Logging.instance.log(
'Adjusted Recipient output size: $satoshiAmountToSend',
level: LogLevel.Info);
Logging.instance.log(
'Adjusted Change Output Size: $changeOutputSize',
level: LogLevel.Info);
Logging.instance.log(
'Adjusted Difference (fee being paid): $feeBeingPaid sats',
level: LogLevel.Info);
Logging.instance.log('Adjusted Estimated fee: $feeForTwoOutputs',
level: LogLevel.Info);
txn = await buildTransaction(
utxoSigningData: utxoSigningData,
recipients: recipientsArray,
satoshiAmounts: recipientsAmtArray,
);
}
Map<String, dynamic> transactionObject = {
"hex": txn["hex"],
"recipient": recipientsArray[0],
"recipientAmt": Amount(
rawValue: BigInt.from(recipientsAmtArray[0]),
fractionDigits: coin.decimals,
),
"fee": feeBeingPaid,
"vSize": txn["vSize"],
"usedUTXOs": utxoSigningData.map((e) => e.utxo).toList(),
};
return transactionObject;
} else {
// Something went wrong here. It either overshot or undershot the estimated fee amount or the changeOutputSize
// is smaller than or equal to DUST_LIMIT. Revert to single output transaction.
Logging.instance.log('1 output in tx', level: LogLevel.Info);
Logging.instance
.log('Input size: $satoshisBeingUsed', level: LogLevel.Info);
Logging.instance.log('Recipient output size: $satoshiAmountToSend',
level: LogLevel.Info);
Logging.instance.log(
'Difference (fee being paid): ${satoshisBeingUsed - satoshiAmountToSend} sats',
level: LogLevel.Info);
Logging.instance
.log('Estimated fee: $feeForOneOutput', level: LogLevel.Info);
dynamic txn = await buildTransaction(
utxoSigningData: utxoSigningData,
recipients: recipientsArray,
satoshiAmounts: recipientsAmtArray,
);
Map<String, dynamic> transactionObject = {
"hex": txn["hex"],
"recipient": recipientsArray[0],
"recipientAmt": Amount(
rawValue: BigInt.from(recipientsAmtArray[0]),
fractionDigits: coin.decimals,
),
"fee": satoshisBeingUsed - satoshiAmountToSend,
"vSize": txn["vSize"],
"usedUTXOs": utxoSigningData.map((e) => e.utxo).toList(),
};
return transactionObject;
}
} else {
// No additional outputs needed since adding one would mean that it'd be smaller than DUST_LIMIT sats
// which makes it uneconomical to add to the transaction. Here, we pass data directly to instruct
// the wallet to begin crafting the transaction that the user requested.
Logging.instance.log('1 output in tx', level: LogLevel.Info);
Logging.instance
.log('Input size: $satoshisBeingUsed', level: LogLevel.Info);
Logging.instance.log('Recipient output size: $satoshiAmountToSend',
level: LogLevel.Info);
Logging.instance.log(
'Difference (fee being paid): ${satoshisBeingUsed - satoshiAmountToSend} sats',
level: LogLevel.Info);
Logging.instance
.log('Estimated fee: $feeForOneOutput', level: LogLevel.Info);
dynamic txn = await buildTransaction(
utxoSigningData: utxoSigningData,
recipients: recipientsArray,
satoshiAmounts: recipientsAmtArray,
);
Map<String, dynamic> transactionObject = {
"hex": txn["hex"],
"recipient": recipientsArray[0],
"recipientAmt": Amount(
rawValue: BigInt.from(recipientsAmtArray[0]),
fractionDigits: coin.decimals,
),
"fee": satoshisBeingUsed - satoshiAmountToSend,
"vSize": txn["vSize"],
"usedUTXOs": utxoSigningData.map((e) => e.utxo).toList(),
};
return transactionObject;
}
} else if (satoshisBeingUsed - satoshiAmountToSend == feeForOneOutput) {
// In this scenario, no additional change output is needed since inputs - outputs equal exactly
// what we need to pay for fees. Here, we pass data directly to instruct the wallet to begin
// crafting the transaction that the user requested.
Logging.instance.log('1 output in tx', level: LogLevel.Info);
Logging.instance
.log('Input size: $satoshisBeingUsed', level: LogLevel.Info);
Logging.instance.log('Recipient output size: $satoshiAmountToSend',
level: LogLevel.Info);
Logging.instance.log(
'Fee being paid: ${satoshisBeingUsed - satoshiAmountToSend} sats',
level: LogLevel.Info);
Logging.instance
.log('Estimated fee: $feeForOneOutput', level: LogLevel.Info);
dynamic txn = await buildTransaction(
utxoSigningData: utxoSigningData,
recipients: recipientsArray,
satoshiAmounts: recipientsAmtArray,
);
Map<String, dynamic> transactionObject = {
"hex": txn["hex"],
"recipient": recipientsArray[0],
"recipientAmt": Amount(
rawValue: BigInt.from(recipientsAmtArray[0]),
fractionDigits: coin.decimals,
),
"fee": feeForOneOutput,
"vSize": txn["vSize"],
"usedUTXOs": utxoSigningData.map((e) => e.utxo).toList(),
};
return transactionObject;
} else {
// Remember that returning 2 indicates that the user does not have a sufficient balance to
// pay for the transaction fee. Ideally, at this stage, we should check if the user has any
// additional outputs they're able to spend and then recalculate fees.
Logging.instance.log(
'Cannot pay tx fee - checking for more outputs and trying again',
level: LogLevel.Warning);
// try adding more outputs
if (spendableOutputs.length > inputsBeingConsumed) {
return coinSelection(
satoshiAmountToSend: satoshiAmountToSend,
selectedTxFeeRate: selectedTxFeeRate,
satsPerVByte: satsPerVByte,
recipientAddress: recipientAddress,
isSendAll: isSendAll,
additionalOutputs: additionalOutputs + 1,
utxos: utxos,
coinControl: coinControl,
);
}
return 2;
}
}
Future<List<SigningData>> fetchBuildTxData(
List<isar_models.UTXO> utxosToUse,
) async {
// return data
List<SigningData> signingData = [];
try {
// Populating the addresses to check
for (var i = 0; i < utxosToUse.length; i++) {
if (utxosToUse[i].address == null) {
final txid = utxosToUse[i].txid;
final tx = await _cachedElectrumXClient.getTransaction(
txHash: txid,
coin: coin,
);
for (final output in tx["vout"] as List) {
final n = output["n"];
if (n != null && n == utxosToUse[i].vout) {
utxosToUse[i] = utxosToUse[i].copyWith(
address: output["scriptPubKey"]?["addresses"]?[0] as String? ??
output["scriptPubKey"]["address"] as String,
);
}
}
}
final derivePathType = addressType(address: utxosToUse[i].address!);
signingData.add(
SigningData(
derivePathType: derivePathType,
utxo: utxosToUse[i],
),
);
}
Map<DerivePathType, Map<String, dynamic>> receiveDerivations = {};
Map<DerivePathType, Map<String, dynamic>> changeDerivations = {};
for (final sd in signingData) {
String? pubKey;
String? wif;
// fetch receiving derivations if null
receiveDerivations[sd.derivePathType] ??= await _fetchDerivations(
chain: 0,
derivePathType: sd.derivePathType,
);
final receiveDerivation =
receiveDerivations[sd.derivePathType]![sd.utxo.address!];
if (receiveDerivation != null) {
pubKey = receiveDerivation["pubKey"] as String;
wif = receiveDerivation["wif"] as String;
} else {
// fetch change derivations if null
changeDerivations[sd.derivePathType] ??= await _fetchDerivations(
chain: 1,
derivePathType: sd.derivePathType,
);
final changeDerivation =
changeDerivations[sd.derivePathType]![sd.utxo.address!];
if (changeDerivation != null) {
pubKey = changeDerivation["pubKey"] as String;
wif = changeDerivation["wif"] as String;
}
}
if (wif == null || pubKey == null) {
final address = await db.getAddress(walletId, sd.utxo.address!);
if (address?.derivationPath != null) {
final node = await Bip32Utils.getBip32Node(
(await mnemonicString)!,
(await mnemonicPassphrase)!,
_network,
address!.derivationPath!.value,
);
wif = node.toWIF();
pubKey = Format.uint8listToString(node.publicKey);
}
}
if (wif != null && pubKey != null) {
final PaymentData data;
final Uint8List? redeemScript;
switch (sd.derivePathType) {
case DerivePathType.bip44:
data = P2PKH(
data: PaymentData(
pubkey: Format.stringToUint8List(pubKey),
),
network: _network,
).data;
redeemScript = null;
break;
case DerivePathType.bip49:
final p2wpkh = P2WPKH(
data: PaymentData(
pubkey: Format.stringToUint8List(pubKey),
),
network: _network,
overridePrefix: _network.bech32!,
).data;
redeemScript = p2wpkh.output;
data = P2SH(data: PaymentData(redeem: p2wpkh), network: _network)
.data;
break;
case DerivePathType.bip84:
data = P2WPKH(
data: PaymentData(
pubkey: Format.stringToUint8List(pubKey),
),
network: _network,
overridePrefix: _network.bech32!,
).data;
redeemScript = null;
break;
default:
throw Exception("DerivePathType unsupported");
}
final keyPair = ECPair.fromWIF(
wif,
network: _network,
);
sd.redeemScript = redeemScript;
sd.output = data.output;
sd.keyPair = keyPair;
}
}
return signingData;
} catch (e, s) {
Logging.instance
.log("fetchBuildTxData() threw: $e,\n$s", level: LogLevel.Error);
rethrow;
}
}
/// Builds and signs a transaction
Future<Map<String, dynamic>> buildTransaction({
required List<SigningData> utxoSigningData,
required List<String> recipients,
required List<int> satoshiAmounts,
}) async {
Logging.instance
.log("Starting buildTransaction ----------", level: LogLevel.Info);
final txb = TransactionBuilder(network: _network);
txb.setVersion(2);
// Add transaction inputs
for (var i = 0; i < utxoSigningData.length; i++) {
final txid = utxoSigningData[i].utxo.txid;
txb.addInput(
txid,
utxoSigningData[i].utxo.vout,
null,
utxoSigningData[i].output!,
_network.bech32!,
);
}
// Add transaction output
for (var i = 0; i < recipients.length; i++) {
txb.addOutput(recipients[i], satoshiAmounts[i], _network.bech32!);
}
try {
// Sign the transaction accordingly
for (var i = 0; i < utxoSigningData.length; i++) {
txb.sign(
vin: i,
keyPair: utxoSigningData[i].keyPair!,
witnessValue: utxoSigningData[i].utxo.value,
redeemScript: utxoSigningData[i].redeemScript,
overridePrefix: _network.bech32!,
);
}
} catch (e, s) {
Logging.instance.log("Caught exception while signing transaction: $e\n$s",
level: LogLevel.Error);
rethrow;
}
final builtTx = txb.build(_network.bech32!);
final vSize = builtTx.virtualSize();
return {"hex": builtTx.toHex(), "vSize": vSize};
}
@override
Future<void> fullRescan(
int maxUnusedAddressGap,
int maxNumberOfIndexesToCheck,
) async {
Logging.instance.log("Starting full rescan!", level: LogLevel.Info);
longMutex = true;
GlobalEventBus.instance.fire(
WalletSyncStatusChangedEvent(
WalletSyncStatus.syncing,
walletId,
coin,
),
);
// clear cache
await _cachedElectrumXClient.clearSharedTransactionCache(coin: coin);
// back up data
// await _rescanBackup();
// clear blockchain info
await db.deleteWalletBlockchainData(walletId);
await _deleteDerivations();
try {
final _mnemonic = await mnemonicString;
final _mnemonicPassphrase = await mnemonicPassphrase;
if (_mnemonicPassphrase == null) {
Logging.instance.log(
"Exception in fullRescan: mnemonic passphrase null, possible migration issue; if using internal builds, delete wallet and restore from seed, if using a release build, please file bug report",
level: LogLevel.Error);
}
await _recoverWalletFromBIP32SeedPhrase(
mnemonic: _mnemonic!,
mnemonicPassphrase: _mnemonicPassphrase!,
maxUnusedAddressGap: maxUnusedAddressGap,
maxNumberOfIndexesToCheck: maxNumberOfIndexesToCheck,
isRescan: true,
);
longMutex = false;
await refresh();
Logging.instance.log("Full rescan complete!", level: LogLevel.Info);
GlobalEventBus.instance.fire(
WalletSyncStatusChangedEvent(
WalletSyncStatus.synced,
walletId,
coin,
),
);
} catch (e, s) {
GlobalEventBus.instance.fire(
WalletSyncStatusChangedEvent(
WalletSyncStatus.unableToSync,
walletId,
coin,
),
);
// restore from backup
// await _rescanRestore();
longMutex = false;
Logging.instance.log("Exception rethrown from fullRescan(): $e\n$s",
level: LogLevel.Error);
rethrow;
}
}
Future<void> _deleteDerivations() async {
// P2PKH derivations
await _secureStore.delete(key: "${walletId}_receiveDerivationsP2PKH");
await _secureStore.delete(key: "${walletId}_changeDerivationsP2PKH");
// P2SH derivations
await _secureStore.delete(key: "${walletId}_receiveDerivationsP2SH");
await _secureStore.delete(key: "${walletId}_changeDerivationsP2SH");
// P2WPKH derivations
await _secureStore.delete(key: "${walletId}_receiveDerivationsP2WPKH");
await _secureStore.delete(key: "${walletId}_changeDerivationsP2WPKH");
}
// Future<void> _rescanRestore() async {
// Logging.instance.log("starting rescan restore", level: LogLevel.Info);
//
// // restore from backup
// // p2pkh
// final tempReceivingAddressesP2PKH = DB.instance
// .get<dynamic>(boxName: walletId, key: 'receivingAddressesP2PKH_BACKUP');
// final tempChangeAddressesP2PKH = DB.instance
// .get<dynamic>(boxName: walletId, key: 'changeAddressesP2PKH_BACKUP');
// final tempReceivingIndexP2PKH = DB.instance
// .get<dynamic>(boxName: walletId, key: 'receivingIndexP2PKH_BACKUP');
// final tempChangeIndexP2PKH = DB.instance
// .get<dynamic>(boxName: walletId, key: 'changeIndexP2PKH_BACKUP');
// await DB.instance.put<dynamic>(
// boxName: walletId,
// key: 'receivingAddressesP2PKH',
// value: tempReceivingAddressesP2PKH);
// await DB.instance.put<dynamic>(
// boxName: walletId,
// key: 'changeAddressesP2PKH',
// value: tempChangeAddressesP2PKH);
// await DB.instance.put<dynamic>(
// boxName: walletId,
// key: 'receivingIndexP2PKH',
// value: tempReceivingIndexP2PKH);
// await DB.instance.put<dynamic>(
// boxName: walletId,
// key: 'changeIndexP2PKH',
// value: tempChangeIndexP2PKH);
// await DB.instance.delete<dynamic>(
// key: 'receivingAddressesP2PKH_BACKUP', boxName: walletId);
// await DB.instance
// .delete<dynamic>(key: 'changeAddressesP2PKH_BACKUP', boxName: walletId);
// await DB.instance
// .delete<dynamic>(key: 'receivingIndexP2PKH_BACKUP', boxName: walletId);
// await DB.instance
// .delete<dynamic>(key: 'changeIndexP2PKH_BACKUP', boxName: walletId);
//
// // p2Sh
// final tempReceivingAddressesP2SH = DB.instance
// .get<dynamic>(boxName: walletId, key: 'receivingAddressesP2SH_BACKUP');
// final tempChangeAddressesP2SH = DB.instance
// .get<dynamic>(boxName: walletId, key: 'changeAddressesP2SH_BACKUP');
// final tempReceivingIndexP2SH = DB.instance
// .get<dynamic>(boxName: walletId, key: 'receivingIndexP2SH_BACKUP');
// final tempChangeIndexP2SH = DB.instance
// .get<dynamic>(boxName: walletId, key: 'changeIndexP2SH_BACKUP');
// await DB.instance.put<dynamic>(
// boxName: walletId,
// key: 'receivingAddressesP2SH',
// value: tempReceivingAddressesP2SH);
// await DB.instance.put<dynamic>(
// boxName: walletId,
// key: 'changeAddressesP2SH',
// value: tempChangeAddressesP2SH);
// await DB.instance.put<dynamic>(
// boxName: walletId,
// key: 'receivingIndexP2SH',
// value: tempReceivingIndexP2SH);
// await DB.instance.put<dynamic>(
// boxName: walletId, key: 'changeIndexP2SH', value: tempChangeIndexP2SH);
// await DB.instance.delete<dynamic>(
// key: 'receivingAddressesP2SH_BACKUP', boxName: walletId);
// await DB.instance
// .delete<dynamic>(key: 'changeAddressesP2SH_BACKUP', boxName: walletId);
// await DB.instance
// .delete<dynamic>(key: 'receivingIndexP2SH_BACKUP', boxName: walletId);
// await DB.instance
// .delete<dynamic>(key: 'changeIndexP2SH_BACKUP', boxName: walletId);
//
// // p2wpkh
// final tempReceivingAddressesP2WPKH = DB.instance.get<dynamic>(
// boxName: walletId, key: 'receivingAddressesP2WPKH_BACKUP');
// final tempChangeAddressesP2WPKH = DB.instance
// .get<dynamic>(boxName: walletId, key: 'changeAddressesP2WPKH_BACKUP');
// final tempReceivingIndexP2WPKH = DB.instance
// .get<dynamic>(boxName: walletId, key: 'receivingIndexP2WPKH_BACKUP');
// final tempChangeIndexP2WPKH = DB.instance
// .get<dynamic>(boxName: walletId, key: 'changeIndexP2WPKH_BACKUP');
// await DB.instance.put<dynamic>(
// boxName: walletId,
// key: 'receivingAddressesP2WPKH',
// value: tempReceivingAddressesP2WPKH);
// await DB.instance.put<dynamic>(
// boxName: walletId,
// key: 'changeAddressesP2WPKH',
// value: tempChangeAddressesP2WPKH);
// await DB.instance.put<dynamic>(
// boxName: walletId,
// key: 'receivingIndexP2WPKH',
// value: tempReceivingIndexP2WPKH);
// await DB.instance.put<dynamic>(
// boxName: walletId,
// key: 'changeIndexP2WPKH',
// value: tempChangeIndexP2WPKH);
// await DB.instance.delete<dynamic>(
// key: 'receivingAddressesP2WPKH_BACKUP', boxName: walletId);
// await DB.instance.delete<dynamic>(
// key: 'changeAddressesP2WPKH_BACKUP', boxName: walletId);
// await DB.instance
// .delete<dynamic>(key: 'receivingIndexP2WPKH_BACKUP', boxName: walletId);
// await DB.instance
// .delete<dynamic>(key: 'changeIndexP2WPKH_BACKUP', boxName: walletId);
//
// // P2PKH derivations
// final p2pkhReceiveDerivationsString = await _secureStore.read(
// key: "${walletId}_receiveDerivationsP2PKH_BACKUP");
// final p2pkhChangeDerivationsString = await _secureStore.read(
// key: "${walletId}_changeDerivationsP2PKH_BACKUP");
//
// await _secureStore.write(
// key: "${walletId}_receiveDerivationsP2PKH",
// value: p2pkhReceiveDerivationsString);
// await _secureStore.write(
// key: "${walletId}_changeDerivationsP2PKH",
// value: p2pkhChangeDerivationsString);
//
// await _secureStore.delete(
// key: "${walletId}_receiveDerivationsP2PKH_BACKUP");
// await _secureStore.delete(key: "${walletId}_changeDerivationsP2PKH_BACKUP");
//
// // P2SH derivations
// final p2shReceiveDerivationsString = await _secureStore.read(
// key: "${walletId}_receiveDerivationsP2SH_BACKUP");
// final p2shChangeDerivationsString = await _secureStore.read(
// key: "${walletId}_changeDerivationsP2SH_BACKUP");
//
// await _secureStore.write(
// key: "${walletId}_receiveDerivationsP2SH",
// value: p2shReceiveDerivationsString);
// await _secureStore.write(
// key: "${walletId}_changeDerivationsP2SH",
// value: p2shChangeDerivationsString);
//
// await _secureStore.delete(key: "${walletId}_receiveDerivationsP2SH_BACKUP");
// await _secureStore.delete(key: "${walletId}_changeDerivationsP2SH_BACKUP");
//
// // P2WPKH derivations
// final p2wpkhReceiveDerivationsString = await _secureStore.read(
// key: "${walletId}_receiveDerivationsP2WPKH_BACKUP");
// final p2wpkhChangeDerivationsString = await _secureStore.read(
// key: "${walletId}_changeDerivationsP2WPKH_BACKUP");
//
// await _secureStore.write(
// key: "${walletId}_receiveDerivationsP2WPKH",
// value: p2wpkhReceiveDerivationsString);
// await _secureStore.write(
// key: "${walletId}_changeDerivationsP2WPKH",
// value: p2wpkhChangeDerivationsString);
//
// await _secureStore.delete(
// key: "${walletId}_receiveDerivationsP2WPKH_BACKUP");
// await _secureStore.delete(
// key: "${walletId}_changeDerivationsP2WPKH_BACKUP");
//
// // UTXOs
// final utxoData = DB.instance
// .get<dynamic>(boxName: walletId, key: 'latest_utxo_model_BACKUP');
// await DB.instance.put<dynamic>(
// boxName: walletId, key: 'latest_utxo_model', value: utxoData);
// await DB.instance
// .delete<dynamic>(key: 'latest_utxo_model_BACKUP', boxName: walletId);
//
// Logging.instance.log("rescan restore complete", level: LogLevel.Info);
// }
//
// Future<void> _rescanBackup() async {
// Logging.instance.log("starting rescan backup", level: LogLevel.Info);
//
// // backup current and clear data
// // p2pkh
// final tempReceivingAddressesP2PKH = DB.instance
// .get<dynamic>(boxName: walletId, key: 'receivingAddressesP2PKH');
// await DB.instance.put<dynamic>(
// boxName: walletId,
// key: 'receivingAddressesP2PKH_BACKUP',
// value: tempReceivingAddressesP2PKH);
// await DB.instance
// .delete<dynamic>(key: 'receivingAddressesP2PKH', boxName: walletId);
//
// final tempChangeAddressesP2PKH = DB.instance
// .get<dynamic>(boxName: walletId, key: 'changeAddressesP2PKH');
// await DB.instance.put<dynamic>(
// boxName: walletId,
// key: 'changeAddressesP2PKH_BACKUP',
// value: tempChangeAddressesP2PKH);
// await DB.instance
// .delete<dynamic>(key: 'changeAddressesP2PKH', boxName: walletId);
//
// final tempReceivingIndexP2PKH =
// DB.instance.get<dynamic>(boxName: walletId, key: 'receivingIndexP2PKH');
// await DB.instance.put<dynamic>(
// boxName: walletId,
// key: 'receivingIndexP2PKH_BACKUP',
// value: tempReceivingIndexP2PKH);
// await DB.instance
// .delete<dynamic>(key: 'receivingIndexP2PKH', boxName: walletId);
//
// final tempChangeIndexP2PKH =
// DB.instance.get<dynamic>(boxName: walletId, key: 'changeIndexP2PKH');
// await DB.instance.put<dynamic>(
// boxName: walletId,
// key: 'changeIndexP2PKH_BACKUP',
// value: tempChangeIndexP2PKH);
// await DB.instance
// .delete<dynamic>(key: 'changeIndexP2PKH', boxName: walletId);
//
// // p2sh
// final tempReceivingAddressesP2SH = DB.instance
// .get<dynamic>(boxName: walletId, key: 'receivingAddressesP2SH');
// await DB.instance.put<dynamic>(
// boxName: walletId,
// key: 'receivingAddressesP2SH_BACKUP',
// value: tempReceivingAddressesP2SH);
// await DB.instance
// .delete<dynamic>(key: 'receivingAddressesP2SH', boxName: walletId);
//
// final tempChangeAddressesP2SH =
// DB.instance.get<dynamic>(boxName: walletId, key: 'changeAddressesP2SH');
// await DB.instance.put<dynamic>(
// boxName: walletId,
// key: 'changeAddressesP2SH_BACKUP',
// value: tempChangeAddressesP2SH);
// await DB.instance
// .delete<dynamic>(key: 'changeAddressesP2SH', boxName: walletId);
//
// final tempReceivingIndexP2SH =
// DB.instance.get<dynamic>(boxName: walletId, key: 'receivingIndexP2SH');
// await DB.instance.put<dynamic>(
// boxName: walletId,
// key: 'receivingIndexP2SH_BACKUP',
// value: tempReceivingIndexP2SH);
// await DB.instance
// .delete<dynamic>(key: 'receivingIndexP2SH', boxName: walletId);
//
// final tempChangeIndexP2SH =
// DB.instance.get<dynamic>(boxName: walletId, key: 'changeIndexP2SH');
// await DB.instance.put<dynamic>(
// boxName: walletId,
// key: 'changeIndexP2SH_BACKUP',
// value: tempChangeIndexP2SH);
// await DB.instance
// .delete<dynamic>(key: 'changeIndexP2SH', boxName: walletId);
//
// // p2wpkh
// final tempReceivingAddressesP2WPKH = DB.instance
// .get<dynamic>(boxName: walletId, key: 'receivingAddressesP2WPKH');
// await DB.instance.put<dynamic>(
// boxName: walletId,
// key: 'receivingAddressesP2WPKH_BACKUP',
// value: tempReceivingAddressesP2WPKH);
// await DB.instance
// .delete<dynamic>(key: 'receivingAddressesP2WPKH', boxName: walletId);
//
// final tempChangeAddressesP2WPKH = DB.instance
// .get<dynamic>(boxName: walletId, key: 'changeAddressesP2WPKH');
// await DB.instance.put<dynamic>(
// boxName: walletId,
// key: 'changeAddressesP2WPKH_BACKUP',
// value: tempChangeAddressesP2WPKH);
// await DB.instance
// .delete<dynamic>(key: 'changeAddressesP2WPKH', boxName: walletId);
//
// final tempReceivingIndexP2WPKH = DB.instance
// .get<dynamic>(boxName: walletId, key: 'receivingIndexP2WPKH');
// await DB.instance.put<dynamic>(
// boxName: walletId,
// key: 'receivingIndexP2WPKH_BACKUP',
// value: tempReceivingIndexP2WPKH);
// await DB.instance
// .delete<dynamic>(key: 'receivingIndexP2WPKH', boxName: walletId);
//
// final tempChangeIndexP2WPKH =
// DB.instance.get<dynamic>(boxName: walletId, key: 'changeIndexP2WPKH');
// await DB.instance.put<dynamic>(
// boxName: walletId,
// key: 'changeIndexP2WPKH_BACKUP',
// value: tempChangeIndexP2WPKH);
// await DB.instance
// .delete<dynamic>(key: 'changeIndexP2WPKH', boxName: walletId);
//
// // P2PKH derivations
// final p2pkhReceiveDerivationsString =
// await _secureStore.read(key: "${walletId}_receiveDerivationsP2PKH");
// final p2pkhChangeDerivationsString =
// await _secureStore.read(key: "${walletId}_changeDerivationsP2PKH");
//
// await _secureStore.write(
// key: "${walletId}_receiveDerivationsP2PKH_BACKUP",
// value: p2pkhReceiveDerivationsString);
// await _secureStore.write(
// key: "${walletId}_changeDerivationsP2PKH_BACKUP",
// value: p2pkhChangeDerivationsString);
//
// await _secureStore.delete(key: "${walletId}_receiveDerivationsP2PKH");
// await _secureStore.delete(key: "${walletId}_changeDerivationsP2PKH");
//
// // P2SH derivations
// final p2shReceiveDerivationsString =
// await _secureStore.read(key: "${walletId}_receiveDerivationsP2SH");
// final p2shChangeDerivationsString =
// await _secureStore.read(key: "${walletId}_changeDerivationsP2SH");
//
// await _secureStore.write(
// key: "${walletId}_receiveDerivationsP2SH_BACKUP",
// value: p2shReceiveDerivationsString);
// await _secureStore.write(
// key: "${walletId}_changeDerivationsP2SH_BACKUP",
// value: p2shChangeDerivationsString);
//
// await _secureStore.delete(key: "${walletId}_receiveDerivationsP2SH");
// await _secureStore.delete(key: "${walletId}_changeDerivationsP2SH");
//
// // P2WPKH derivations
// final p2wpkhReceiveDerivationsString =
// await _secureStore.read(key: "${walletId}_receiveDerivationsP2WPKH");
// final p2wpkhChangeDerivationsString =
// await _secureStore.read(key: "${walletId}_changeDerivationsP2WPKH");
//
// await _secureStore.write(
// key: "${walletId}_receiveDerivationsP2WPKH_BACKUP",
// value: p2wpkhReceiveDerivationsString);
// await _secureStore.write(
// key: "${walletId}_changeDerivationsP2WPKH_BACKUP",
// value: p2wpkhChangeDerivationsString);
//
// await _secureStore.delete(key: "${walletId}_receiveDerivationsP2WPKH");
// await _secureStore.delete(key: "${walletId}_changeDerivationsP2WPKH");
//
// // UTXOs
// final utxoData =
// DB.instance.get<dynamic>(boxName: walletId, key: 'latest_utxo_model');
// await DB.instance.put<dynamic>(
// boxName: walletId, key: 'latest_utxo_model_BACKUP', value: utxoData);
// await DB.instance
// .delete<dynamic>(key: 'latest_utxo_model', boxName: walletId);
//
// Logging.instance.log("rescan backup complete", level: LogLevel.Info);
// }
bool isActive = false;
@override
void Function(bool)? get onIsActiveWalletChanged =>
(isActive) => this.isActive = isActive;
@override
Future<Amount> estimateFeeFor(Amount amount, int feeRate) async {
final available = balance.spendable;
if (available == amount) {
return amount - (await sweepAllEstimate(feeRate));
} else if (amount <= Amount.zero || amount > available) {
return roughFeeEstimate(1, 2, feeRate);
}
Amount runningBalance = Amount(
rawValue: BigInt.zero,
fractionDigits: coin.decimals,
);
int inputCount = 0;
for (final output in (await utxos)) {
if (!output.isBlocked) {
runningBalance = runningBalance +
Amount(
rawValue: BigInt.from(output.value),
fractionDigits: coin.decimals,
);
inputCount++;
if (runningBalance > amount) {
break;
}
}
}
final oneOutPutFee = roughFeeEstimate(inputCount, 1, feeRate);
final twoOutPutFee = roughFeeEstimate(inputCount, 2, feeRate);
if (runningBalance - amount > oneOutPutFee) {
if (runningBalance - amount > oneOutPutFee + DUST_LIMIT) {
final change = runningBalance - amount - twoOutPutFee;
if (change > DUST_LIMIT &&
runningBalance - amount - change == twoOutPutFee) {
return runningBalance - amount - change;
} else {
return runningBalance - amount;
}
} else {
return runningBalance - amount;
}
} else if (runningBalance - amount == oneOutPutFee) {
return oneOutPutFee;
} else {
return twoOutPutFee;
}
}
// TODO: Check if this is the correct formula for namecoin
Amount roughFeeEstimate(int inputCount, int outputCount, int feeRatePerKB) {
return Amount(
rawValue: BigInt.from(
((42 + (272 * inputCount) + (128 * outputCount)) / 4).ceil() *
(feeRatePerKB / 1000).ceil()),
fractionDigits: coin.decimals,
);
}
Future<Amount> sweepAllEstimate(int feeRate) async {
int available = 0;
int inputCount = 0;
for (final output in (await utxos)) {
if (!output.isBlocked &&
output.isConfirmed(storedChainHeight, MINIMUM_CONFIRMATIONS)) {
available += output.value;
inputCount++;
}
}
// transaction will only have 1 output minus the fee
final estimatedFee = roughFeeEstimate(inputCount, 1, feeRate);
return Amount(
rawValue: BigInt.from(available),
fractionDigits: coin.decimals,
) -
estimatedFee;
}
@override
Future<bool> generateNewAddress() async {
try {
final currentReceiving = await _currentReceivingAddress;
final newReceivingIndex = currentReceiving.derivationIndex + 1;
// Use new index to derive a new receiving address
final newReceivingAddress = await _generateAddressForChain(
0, newReceivingIndex, DerivePathTypeExt.primaryFor(coin));
// Add that new receiving address
await db.putAddress(newReceivingAddress);
return true;
} catch (e, s) {
Logging.instance.log(
"Exception rethrown from generateNewAddress(): $e\n$s",
level: LogLevel.Error);
return false;
}
}
@override
Future<String> get xpub async {
final node = await Bip32Utils.getBip32Root(
(await mnemonic).join(" "),
await mnemonicPassphrase ?? "",
_network,
);
return node.neutered().toBase58();
}
}
// Namecoin Network
final namecoin = NetworkType(
messagePrefix: '\x18Namecoin Signed Message:\n',
bech32: 'nc',
bip32: Bip32Type(public: 0x0488b21e, private: 0x0488ade4),
pubKeyHash: 0x34, //From 52
scriptHash: 0x0d, //13
wif: 0xb4); //from 180