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stack_wallet/lib/services/coins/namecoin/namecoin_wallet.dart
julian cf8b0ea83a nmc tx parse fix
2022-09-25 13:11:10 -06:00

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import 'dart:async';
import 'dart:convert';
import 'dart:io';
import 'dart:typed_data';
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:flutter_secure_storage/flutter_secure_storage.dart';
import 'package:http/http.dart';
import 'package:stackwallet/electrumx_rpc/cached_electrumx.dart';
import 'package:stackwallet/electrumx_rpc/electrumx.dart';
import 'package:stackwallet/hive/db.dart';
import 'package:stackwallet/models/models.dart' as models;
import 'package:stackwallet/models/paymint/fee_object_model.dart';
import 'package:stackwallet/models/paymint/transactions_model.dart';
import 'package:stackwallet/models/paymint/utxo_model.dart';
import 'package:stackwallet/services/coins/coin_service.dart';
import 'package:stackwallet/services/event_bus/events/global/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/node_service.dart';
import 'package:stackwallet/services/notifications_api.dart';
import 'package:stackwallet/services/price.dart';
import 'package:stackwallet/services/transaction_notification_tracker.dart';
import 'package:stackwallet/utilities/assets.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/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:tuple/tuple.dart';
import 'package:uuid/uuid.dart';
const int MINIMUM_CONFIRMATIONS = 2;
// Find real dust limit
const int DUST_LIMIT = 546;
const String GENESIS_HASH_MAINNET =
"000000000062b72c5e2ceb45fbc8587e807c155b0da735e6483dfba2f0a9c770";
const String GENESIS_HASH_TESTNET =
"00000007199508e34a9ff81e6ec0c477a4cccff2a4767a8eee39c11db367b008";
enum DerivePathType { bip44, bip49, bip84 }
bip32.BIP32 getBip32Node(
int chain,
int index,
String mnemonic,
NetworkType network,
DerivePathType derivePathType,
) {
final root = getBip32Root(mnemonic, network);
final node = getBip32NodeFromRoot(chain, index, root, derivePathType);
return node;
}
/// wrapper for compute()
bip32.BIP32 getBip32NodeWrapper(
Tuple5<int, int, String, NetworkType, DerivePathType> args,
) {
return getBip32Node(
args.item1,
args.item2,
args.item3,
args.item4,
args.item5,
);
}
bip32.BIP32 getBip32NodeFromRoot(
int chain,
int index,
bip32.BIP32 root,
DerivePathType derivePathType,
) {
String coinType;
switch (root.network.wif) {
case 0xb4: // nmc mainnet wif
coinType = "7"; // nmc mainnet
break;
default:
throw Exception("Invalid Namecoin network type used!");
}
switch (derivePathType) {
case DerivePathType.bip44:
return root.derivePath("m/44'/$coinType'/0'/$chain/$index");
case DerivePathType.bip49:
return root.derivePath("m/49'/$coinType'/0'/$chain/$index");
case DerivePathType.bip84:
return root.derivePath("m/84'/$coinType'/0'/$chain/$index");
default:
throw Exception("DerivePathType must not be null.");
}
}
/// wrapper for compute()
bip32.BIP32 getBip32NodeFromRootWrapper(
Tuple4<int, int, bip32.BIP32, DerivePathType> args,
) {
return getBip32NodeFromRoot(
args.item1,
args.item2,
args.item3,
args.item4,
);
}
bip32.BIP32 getBip32Root(String mnemonic, NetworkType network) {
final seed = bip39.mnemonicToSeed(mnemonic);
final networkType = bip32.NetworkType(
wif: network.wif,
bip32: bip32.Bip32Type(
public: network.bip32.public,
private: network.bip32.private,
),
);
final root = bip32.BIP32.fromSeed(seed, networkType);
return root;
}
/// wrapper for compute()
bip32.BIP32 getBip32RootWrapper(Tuple2<String, NetworkType> args) {
return getBip32Root(args.item1, args.item2);
}
class NamecoinWallet extends CoinServiceAPI {
static const integrationTestFlag =
bool.fromEnvironment("IS_INTEGRATION_TEST");
final _prefs = Prefs.instance;
Timer? timer;
late Coin _coin;
late final TransactionNotificationTracker txTracker;
NetworkType get _network {
switch (coin) {
case Coin.namecoin:
return namecoin;
default:
throw Exception("Invalid network type!");
}
}
List<UtxoObject> outputsList = [];
@override
set isFavorite(bool markFavorite) {
DB.instance.put<dynamic>(
boxName: walletId, key: "isFavorite", value: markFavorite);
}
@override
bool get isFavorite {
try {
return DB.instance.get<dynamic>(boxName: walletId, key: "isFavorite")
as bool;
} catch (e, s) {
Logging.instance
.log("isFavorite fetch failed: $e\n$s", level: LogLevel.Error);
rethrow;
}
}
@override
Coin get coin => _coin;
@override
Future<List<String>> get allOwnAddresses =>
_allOwnAddresses ??= _fetchAllOwnAddresses();
Future<List<String>>? _allOwnAddresses;
Future<UtxoData>? _utxoData;
Future<UtxoData> get utxoData => _utxoData ??= _fetchUtxoData();
@override
Future<List<UtxoObject>> get unspentOutputs async =>
(await utxoData).unspentOutputArray;
@override
Future<Decimal> get availableBalance async {
final data = await utxoData;
return Format.satoshisToAmount(
data.satoshiBalance - data.satoshiBalanceUnconfirmed);
}
@override
Future<Decimal> get pendingBalance async {
final data = await utxoData;
return Format.satoshisToAmount(data.satoshiBalanceUnconfirmed);
}
@override
Future<Decimal> get balanceMinusMaxFee async =>
(await availableBalance) -
(Decimal.fromInt((await maxFee)) / Decimal.fromInt(Constants.satsPerCoin))
.toDecimal();
@override
Future<Decimal> get totalBalance async {
if (!isActive) {
final totalBalance = DB.instance
.get<dynamic>(boxName: walletId, key: 'totalBalance') as int?;
if (totalBalance == null) {
final data = await utxoData;
return Format.satoshisToAmount(data.satoshiBalance);
} else {
return Format.satoshisToAmount(totalBalance);
}
}
final data = await utxoData;
return Format.satoshisToAmount(data.satoshiBalance);
}
@override
Future<String> get currentReceivingAddress => _currentReceivingAddress ??=
_getCurrentAddressForChain(0, DerivePathType.bip84);
Future<String>? _currentReceivingAddress;
Future<String> get currentLegacyReceivingAddress =>
_currentReceivingAddressP2PKH ??=
_getCurrentAddressForChain(0, DerivePathType.bip44);
Future<String>? _currentReceivingAddressP2PKH;
Future<String> get currentReceivingAddressP2SH =>
_currentReceivingAddressP2SH ??=
_getCurrentAddressForChain(0, DerivePathType.bip49);
Future<String>? _currentReceivingAddressP2SH;
@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);
return satsFee.floor().toBigInt().toInt();
}
@override
Future<List<String>> get mnemonic => _getMnemonicList();
Future<int> get chainHeight async {
try {
final result = await _electrumXClient.getBlockHeadTip();
return result["height"] as int;
} catch (e, s) {
Logging.instance.log("Exception caught in chainHeight: $e\n$s",
level: LogLevel.Error);
return -1;
}
}
int get storedChainHeight {
final storedHeight = DB.instance
.get<dynamic>(boxName: walletId, key: "storedChainHeight") as int?;
return storedHeight ?? 0;
}
Future<void> updateStoredChainHeight({required int newHeight}) async {
await DB.instance.put<dynamic>(
boxName: walletId, key: "storedChainHeight", value: newHeight);
}
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,
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) {
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: ${coin.name}");
}
// if (_networkType == BasicNetworkType.main) {
// if (features['genesis_hash'] != GENESIS_HASH_MAINNET) {
// throw Exception("genesis hash does not match main net!");
// }
// } else if (_networkType == BasicNetworkType.test) {
// if (features['genesis_hash'] != GENESIS_HASH_TESTNET) {
// throw Exception("genesis hash does not match test net!");
// }
// }
}
// check to make sure we aren't overwriting a mnemonic
// this should never fail
if ((await _secureStore.read(key: '${_walletId}_mnemonic')) != null) {
longMutex = false;
throw Exception("Attempted to overwrite mnemonic on restore!");
}
await _secureStore.write(
key: '${_walletId}_mnemonic', value: mnemonic.trim());
await _recoverWalletFromBIP32SeedPhrase(
mnemonic: mnemonic.trim(),
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 account) async {
List<String> 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 $account ${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 node = await compute(
getBip32NodeFromRootWrapper,
Tuple4(
account,
index + j,
root,
type,
),
);
String? address;
switch (type) {
case DerivePathType.bip44:
address = P2PKH(
data: PaymentData(pubkey: node.publicKey),
network: _network)
.data
.address!;
break;
case DerivePathType.bip49:
address = P2SH(
data: PaymentData(
redeem: P2WPKH(
data: PaymentData(pubkey: node.publicKey),
network: _network,
overridePrefix: namecoin.bech32!)
.data),
network: _network)
.data
.address!;
break;
case DerivePathType.bip84:
address = P2WPKH(
network: _network,
data: PaymentData(pubkey: node.publicKey),
overridePrefix: namecoin.bech32!)
.data
.address!;
break;
default:
throw Exception("No Path type $type exists");
}
receivingNodes.addAll({
"${_id}_$j": {
"node": node,
"address": address,
}
});
txCountCallArgs.addAll({
"${_id}_$j": address,
});
}
// get address tx counts
final counts = await _getBatchTxCount(addresses: txCountCallArgs);
// check and add appropriate addresses
for (int k = 0; k < txCountBatchSize; k++) {
int count = counts["${_id}_$k"]!;
if (count > 0) {
final node = receivingNodes["${_id}_$k"];
// add address to array
addressArray.add(node["address"] as String);
iterationsAddressArray.add(node["address"] as String);
// set current index
returningIndex = index + k;
// reset counter
gapCounter = 0;
// add info to derivations
derivations[node["address"] as String] = {
"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,
int maxUnusedAddressGap = 20,
int maxNumberOfIndexesToCheck = 1000,
}) 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 compute(getBip32RootWrapper, Tuple2(mnemonic, _network));
List<String> p2pkhReceiveAddressArray = [];
List<String> p2shReceiveAddressArray = [];
List<String> p2wpkhReceiveAddressArray = [];
int p2pkhReceiveIndex = -1;
int p2shReceiveIndex = -1;
int p2wpkhReceiveIndex = -1;
List<String> p2pkhChangeAddressArray = [];
List<String> p2shChangeAddressArray = [];
List<String> 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<String>;
p2pkhReceiveIndex = (await resultReceive44)['index'] as int;
p2pkhReceiveDerivations = (await resultReceive44)['derivations']
as Map<String, Map<String, String>>;
p2shReceiveAddressArray =
(await resultReceive49)['addressArray'] as List<String>;
p2shReceiveIndex = (await resultReceive49)['index'] as int;
p2shReceiveDerivations = (await resultReceive49)['derivations']
as Map<String, Map<String, String>>;
p2wpkhReceiveAddressArray =
(await resultReceive84)['addressArray'] as List<String>;
p2wpkhReceiveIndex = (await resultReceive84)['index'] as int;
p2wpkhReceiveDerivations = (await resultReceive84)['derivations']
as Map<String, Map<String, String>>;
p2pkhChangeAddressArray =
(await resultChange44)['addressArray'] as List<String>;
p2pkhChangeIndex = (await resultChange44)['index'] as int;
p2pkhChangeDerivations = (await resultChange44)['derivations']
as Map<String, Map<String, String>>;
p2shChangeAddressArray =
(await resultChange49)['addressArray'] as List<String>;
p2shChangeIndex = (await resultChange49)['index'] as int;
p2shChangeDerivations = (await resultChange49)['derivations']
as Map<String, Map<String, String>>;
p2wpkhChangeAddressArray =
(await resultChange84)['addressArray'] as List<String>;
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);
p2pkhReceiveIndex = 0;
}
if (p2shReceiveIndex == -1) {
final address =
await _generateAddressForChain(0, 0, DerivePathType.bip49);
p2shReceiveAddressArray.add(address);
p2shReceiveIndex = 0;
}
if (p2wpkhReceiveIndex == -1) {
final address =
await _generateAddressForChain(0, 0, DerivePathType.bip84);
p2wpkhReceiveAddressArray.add(address);
p2wpkhReceiveIndex = 0;
}
// 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);
p2pkhChangeIndex = 0;
}
if (p2shChangeIndex == -1) {
final address =
await _generateAddressForChain(1, 0, DerivePathType.bip49);
p2shChangeAddressArray.add(address);
p2shChangeIndex = 0;
}
if (p2wpkhChangeIndex == -1) {
final address =
await _generateAddressForChain(1, 0, DerivePathType.bip84);
p2wpkhChangeAddressArray.add(address);
p2wpkhChangeIndex = 0;
}
await DB.instance.put<dynamic>(
boxName: walletId,
key: 'receivingAddressesP2WPKH',
value: p2wpkhReceiveAddressArray);
await DB.instance.put<dynamic>(
boxName: walletId,
key: 'changeAddressesP2WPKH',
value: p2wpkhChangeAddressArray);
await DB.instance.put<dynamic>(
boxName: walletId,
key: 'receivingAddressesP2PKH',
value: p2pkhReceiveAddressArray);
await DB.instance.put<dynamic>(
boxName: walletId,
key: 'changeAddressesP2PKH',
value: p2pkhChangeAddressArray);
await DB.instance.put<dynamic>(
boxName: walletId,
key: 'receivingAddressesP2SH',
value: p2shReceiveAddressArray);
await DB.instance.put<dynamic>(
boxName: walletId,
key: 'changeAddressesP2SH',
value: p2shChangeAddressArray);
await DB.instance.put<dynamic>(
boxName: walletId,
key: 'receivingIndexP2WPKH',
value: p2wpkhReceiveIndex);
await DB.instance.put<dynamic>(
boxName: walletId,
key: 'changeIndexP2WPKH',
value: p2wpkhChangeIndex);
await DB.instance.put<dynamic>(
boxName: walletId, key: 'changeIndexP2PKH', value: p2pkhChangeIndex);
await DB.instance.put<dynamic>(
boxName: walletId,
key: 'receivingIndexP2PKH',
value: p2pkhReceiveIndex);
await DB.instance.put<dynamic>(
boxName: walletId,
key: 'receivingIndexP2SH',
value: p2shReceiveIndex);
await DB.instance.put<dynamic>(
boxName: walletId, key: 'changeIndexP2SH', value: p2shChangeIndex);
await DB.instance
.put<dynamic>(boxName: walletId, key: "id", value: _walletId);
await DB.instance
.put<dynamic>(boxName: walletId, key: "isFavorite", value: 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);
final txData = await transactionData;
for (Map<String, dynamic> transaction in allTxs) {
if (txData.findTransaction(transaction['tx_hash'] as String) ==
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(
TransactionData txData,
) async {
if (_hasCalledExit) return;
List<models.Transaction> unconfirmedTxnsToNotifyPending = [];
List<models.Transaction> unconfirmedTxnsToNotifyConfirmed = [];
for (final chunk in txData.txChunks) {
for (final tx in chunk.transactions) {
if (tx.confirmedStatus) {
// 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) {
if (tx.txType == "Received") {
unawaited(NotificationApi.showNotification(
title: "Incoming transaction",
body: walletName,
walletId: walletId,
iconAssetName: Assets.svg.iconFor(coin: coin),
date: DateTime.fromMillisecondsSinceEpoch(tx.timestamp * 1000),
shouldWatchForUpdates: tx.confirmations < MINIMUM_CONFIRMATIONS,
coinName: coin.name,
txid: tx.txid,
confirmations: tx.confirmations,
requiredConfirmations: MINIMUM_CONFIRMATIONS,
));
await txTracker.addNotifiedPending(tx.txid);
} else if (tx.txType == "Sent") {
unawaited(NotificationApi.showNotification(
title: "Sending transaction",
body: walletName,
walletId: walletId,
iconAssetName: Assets.svg.iconFor(coin: coin),
date: DateTime.fromMillisecondsSinceEpoch(tx.timestamp * 1000),
shouldWatchForUpdates: tx.confirmations < MINIMUM_CONFIRMATIONS,
coinName: coin.name,
txid: tx.txid,
confirmations: tx.confirmations,
requiredConfirmations: MINIMUM_CONFIRMATIONS,
));
await txTracker.addNotifiedPending(tx.txid);
}
}
// notify on confirmed
for (final tx in unconfirmedTxnsToNotifyConfirmed) {
if (tx.txType == "Received") {
unawaited(NotificationApi.showNotification(
title: "Incoming transaction confirmed",
body: walletName,
walletId: walletId,
iconAssetName: Assets.svg.iconFor(coin: coin),
date: DateTime.fromMillisecondsSinceEpoch(tx.timestamp * 1000),
shouldWatchForUpdates: false,
coinName: coin.name,
));
await txTracker.addNotifiedConfirmed(tx.txid);
} else if (tx.txType == "Sent") {
unawaited(NotificationApi.showNotification(
title: "Outgoing transaction confirmed",
body: walletName,
walletId: walletId,
iconAssetName: Assets.svg.iconFor(coin: coin),
date: DateTime.fromMillisecondsSinceEpoch(tx.timestamp * 1000),
shouldWatchForUpdates: false,
coinName: coin.name,
));
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) {
if (currentHeight != -1) {
// -1 failed to fetch current height
unawaited(updateStoredChainHeight(newHeight: currentHeight));
}
GlobalEventBus.instance.fire(RefreshPercentChangedEvent(0.2, walletId));
final changeAddressForTransactions =
_checkChangeAddressForTransactions(DerivePathType.bip84);
GlobalEventBus.instance.fire(RefreshPercentChangedEvent(0.3, walletId));
final currentReceivingAddressesForTransactions =
_checkCurrentReceivingAddressesForTransactions();
final newTxData = _fetchTransactionData();
GlobalEventBus.instance
.fire(RefreshPercentChangedEvent(0.50, walletId));
final newUtxoData = _fetchUtxoData();
final feeObj = _getFees();
GlobalEventBus.instance
.fire(RefreshPercentChangedEvent(0.60, walletId));
_transactionData = Future(() => newTxData);
GlobalEventBus.instance
.fire(RefreshPercentChangedEvent(0.70, walletId));
_feeObject = Future(() => feeObj);
_utxoData = Future(() => newUtxoData);
GlobalEventBus.instance
.fire(RefreshPercentChangedEvent(0.80, walletId));
final allTxsToWatch = getAllTxsToWatch(await newTxData);
await Future.wait([
newTxData,
changeAddressForTransactions,
currentReceivingAddressesForTransactions,
newUtxoData,
feeObj,
allTxsToWatch,
]);
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 int satoshiAmount,
Map<String, dynamic>? args,
}) async {
try {
final feeRateType = args?["feeRate"];
final feeRateAmount = args?["feeRateAmount"];
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;
}
rate = fee;
} else {
rate = feeRateAmount as int;
}
// check for send all
bool isSendAll = false;
final balance = Format.decimalAmountToSatoshis(await availableBalance);
if (satoshiAmount == balance) {
isSendAll = true;
}
final txData =
await coinSelection(satoshiAmount, rate, address, isSendAll);
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);
return txHash;
} catch (e, s) {
Logging.instance.log("Exception rethrown from confirmSend(): $e\n$s",
level: LogLevel.Error);
rethrow;
}
}
@override
Future<String> send({
required String toAddress,
required int amount,
Map<String, String> args = const {},
}) async {
try {
final txData = await prepareSend(
address: toAddress, satoshiAmount: amount, args: args);
final txHash = await confirmSend(txData: txData);
return txHash;
} catch (e, s) {
Logging.instance
.log("Exception rethrown from send(): $e\n$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();
_isConnected = hasNetwork;
if (_isConnected != hasNetwork) {
NodeConnectionStatus status = hasNetwork
? NodeConnectionStatus.connected
: NodeConnectionStatus.disconnected;
GlobalEventBus.instance
.fire(NodeConnectionStatusChangedEvent(status, walletId, coin));
}
}
void stopNetworkAlivePinging() {
_networkAliveTimer?.cancel();
_networkAliveTimer = null;
}
bool _isConnected = false;
@override
bool get isConnected => _isConnected;
@override
Future<void> initializeNew() async {
Logging.instance
.log("Generating new ${coin.prettyName} wallet.", level: LogLevel.Info);
if ((DB.instance.get<dynamic>(boxName: walletId, key: "id")) != null) {
throw Exception(
"Attempted to initialize a new wallet using an existing wallet ID!");
}
await _prefs.init();
try {
await _generateNewWallet();
} catch (e, s) {
Logging.instance.log("Exception rethrown from initializeNew(): $e\n$s",
level: LogLevel.Fatal);
rethrow;
}
await Future.wait([
DB.instance.put<dynamic>(boxName: walletId, key: "id", value: walletId),
DB.instance
.put<dynamic>(boxName: walletId, key: "isFavorite", value: false),
]);
}
@override
Future<void> initializeExisting() async {
Logging.instance.log("Opening existing ${coin.prettyName} wallet.",
level: LogLevel.Info);
if ((DB.instance.get<dynamic>(boxName: walletId, key: "id")) == null) {
throw Exception(
"Attempted to initialize an existing wallet using an unknown wallet ID!");
}
await _prefs.init();
final data =
DB.instance.get<dynamic>(boxName: walletId, key: "latest_tx_model")
as TransactionData?;
if (data != null) {
_transactionData = Future(() => data);
}
}
@override
Future<TransactionData> get transactionData =>
_transactionData ??= _fetchTransactionData();
Future<TransactionData>? _transactionData;
@override
bool validateAddress(String address) {
return Address.validateAddress(address, _network, namecoin.bech32!);
}
@override
String get walletId => _walletId;
late String _walletId;
@override
String get walletName => _walletName;
late String _walletName;
// setter for updating on rename
@override
set walletName(String newName) => _walletName = newName;
late ElectrumX _electrumXClient;
ElectrumX get electrumXClient => _electrumXClient;
late CachedElectrumX _cachedElectrumXClient;
CachedElectrumX get cachedElectrumXClient => _cachedElectrumXClient;
late FlutterSecureStorageInterface _secureStore;
late PriceAPI _priceAPI;
NamecoinWallet({
required String walletId,
required String walletName,
required Coin coin,
required ElectrumX client,
required CachedElectrumX cachedClient,
required TransactionNotificationTracker tracker,
PriceAPI? priceAPI,
FlutterSecureStorageInterface? secureStore,
}) {
txTracker = tracker;
_walletId = walletId;
_walletName = walletName;
_coin = coin;
_electrumXClient = client;
_cachedElectrumXClient = cachedClient;
_priceAPI = priceAPI ?? PriceAPI(Client());
_secureStore =
secureStore ?? const SecureStorageWrapper(FlutterSecureStorage());
}
@override
Future<void> updateNode(bool shouldRefresh) async {
final failovers = NodeService()
.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();
_cachedElectrumXClient = CachedElectrumX.from(
node: newNode,
prefs: _prefs,
failovers: failovers,
);
_electrumXClient = ElectrumX.from(
node: newNode,
prefs: _prefs,
failovers: failovers,
);
if (shouldRefresh) {
unawaited(refresh());
}
}
Future<List<String>> _getMnemonicList() async {
final mnemonicString =
await _secureStore.read(key: '${_walletId}_mnemonic');
if (mnemonicString == null) {
return [];
}
final List<String> data = mnemonicString.split(' ');
return data;
}
Future<ElectrumXNode> getCurrentNode() async {
final node = NodeService().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<String>> _fetchAllOwnAddresses() async {
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: Format.decimalAmountToSatoshis(fast),
medium: Format.decimalAmountToSatoshis(medium),
slow: Format.decimalAmountToSatoshis(slow),
);
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() async {
Logging.instance
.log("IS_INTEGRATION_TEST: $integrationTestFlag", level: LogLevel.Info);
if (!integrationTestFlag) {
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: ${coin.name}");
}
}
// this should never fail
if ((await _secureStore.read(key: '${_walletId}_mnemonic')) != null) {
throw Exception(
"Attempted to overwrite mnemonic on generate new wallet!");
}
await _secureStore.write(
key: '${_walletId}_mnemonic',
value: bip39.generateMnemonic(strength: 256));
// Set relevant indexes
await DB.instance
.put<dynamic>(boxName: walletId, key: "receivingIndexP2WPKH", value: 0);
await DB.instance
.put<dynamic>(boxName: walletId, key: "changeIndexP2WPKH", value: 0);
await DB.instance
.put<dynamic>(boxName: walletId, key: "receivingIndexP2PKH", value: 0);
await DB.instance
.put<dynamic>(boxName: walletId, key: "changeIndexP2PKH", value: 0);
await DB.instance
.put<dynamic>(boxName: walletId, key: "receivingIndexP2SH", value: 0);
await DB.instance
.put<dynamic>(boxName: walletId, key: "changeIndexP2SH", value: 0);
await DB.instance.put<dynamic>(
boxName: walletId,
key: 'blocked_tx_hashes',
value: ["0xdefault"],
); // A list of transaction hashes to represent frozen utxos in wallet
// initialize address book entries
await DB.instance.put<dynamic>(
boxName: walletId,
key: 'addressBookEntries',
value: <String, String>{});
// Generate and add addresses to relevant arrays
await Future.wait([
// P2WPKH
_generateAddressForChain(0, 0, DerivePathType.bip84).then(
(initialReceivingAddressP2WPKH) {
_addToAddressesArrayForChain(
initialReceivingAddressP2WPKH, 0, DerivePathType.bip84);
_currentReceivingAddress =
Future(() => initialReceivingAddressP2WPKH);
},
),
_generateAddressForChain(1, 0, DerivePathType.bip84).then(
(initialChangeAddressP2WPKH) => _addToAddressesArrayForChain(
initialChangeAddressP2WPKH,
1,
DerivePathType.bip84,
),
),
// P2PKH
_generateAddressForChain(0, 0, DerivePathType.bip44).then(
(initialReceivingAddressP2PKH) {
_addToAddressesArrayForChain(
initialReceivingAddressP2PKH, 0, DerivePathType.bip44);
_currentReceivingAddressP2PKH =
Future(() => initialReceivingAddressP2PKH);
},
),
_generateAddressForChain(1, 0, DerivePathType.bip44).then(
(initialChangeAddressP2PKH) => _addToAddressesArrayForChain(
initialChangeAddressP2PKH,
1,
DerivePathType.bip44,
),
),
// P2SH
_generateAddressForChain(0, 0, DerivePathType.bip49).then(
(initialReceivingAddressP2SH) {
_addToAddressesArrayForChain(
initialReceivingAddressP2SH, 0, DerivePathType.bip49);
_currentReceivingAddressP2SH =
Future(() => initialReceivingAddressP2SH);
},
),
_generateAddressForChain(1, 0, DerivePathType.bip49).then(
(initialChangeAddressP2SH) => _addToAddressesArrayForChain(
initialChangeAddressP2SH,
1,
DerivePathType.bip49,
),
),
]);
// // P2PKH
// _generateAddressForChain(0, 0, DerivePathType.bip44).then(
// (initialReceivingAddressP2PKH) {
// _addToAddressesArrayForChain(
// initialReceivingAddressP2PKH, 0, DerivePathType.bip44);
// this._currentReceivingAddressP2PKH =
// Future(() => initialReceivingAddressP2PKH);
// },
// );
// _generateAddressForChain(1, 0, DerivePathType.bip44)
// .then((initialChangeAddressP2PKH) => _addToAddressesArrayForChain(
// initialChangeAddressP2PKH,
// 1,
// DerivePathType.bip44,
// ));
//
// // P2SH
// _generateAddressForChain(0, 0, DerivePathType.bip49).then(
// (initialReceivingAddressP2SH) {
// _addToAddressesArrayForChain(
// initialReceivingAddressP2SH, 0, DerivePathType.bip49);
// this._currentReceivingAddressP2SH =
// Future(() => initialReceivingAddressP2SH);
// },
// );
// _generateAddressForChain(1, 0, DerivePathType.bip49)
// .then((initialChangeAddressP2SH) => _addToAddressesArrayForChain(
// initialChangeAddressP2SH,
// 1,
// DerivePathType.bip49,
// ));
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<String> _generateAddressForChain(
int chain,
int index,
DerivePathType derivePathType,
) async {
final mnemonic = await _secureStore.read(key: '${_walletId}_mnemonic');
final node = await compute(
getBip32NodeWrapper,
Tuple5(
chain,
index,
mnemonic!,
_network,
derivePathType,
),
);
final data = PaymentData(pubkey: node.publicKey);
String address;
switch (derivePathType) {
case DerivePathType.bip44:
address = P2PKH(data: data, network: _network).data.address!;
break;
case DerivePathType.bip49:
address = P2SH(
data: PaymentData(
redeem: P2WPKH(
data: data,
network: _network,
overridePrefix: namecoin.bech32!)
.data),
network: _network)
.data
.address!;
break;
case DerivePathType.bip84:
address = P2WPKH(
network: _network, data: data, overridePrefix: namecoin.bech32!)
.data
.address!;
break;
}
// add generated address & info to derivations
await addDerivation(
chain: chain,
address: address,
pubKey: Format.uint8listToString(node.publicKey),
wif: node.toWIF(),
derivePathType: derivePathType,
);
return address;
}
/// Increases the index for either the internal or external chain, depending on [chain].
/// [chain] - Use 0 for receiving (external), 1 for change (internal). Should not be any other value!
Future<void> _incrementAddressIndexForChain(
int chain, DerivePathType derivePathType) async {
// Here we assume chain == 1 if it isn't 0
String indexKey = chain == 0 ? "receivingIndex" : "changeIndex";
switch (derivePathType) {
case DerivePathType.bip44:
indexKey += "P2PKH";
break;
case DerivePathType.bip49:
indexKey += "P2SH";
break;
case DerivePathType.bip84:
indexKey += "P2WPKH";
break;
}
final newIndex =
(DB.instance.get<dynamic>(boxName: walletId, key: indexKey)) + 1;
await DB.instance
.put<dynamic>(boxName: walletId, key: indexKey, value: newIndex);
}
/// Adds [address] to the relevant chain's address array, which is determined by [chain].
/// [address] - Expects a standard native segwit address
/// [chain] - Use 0 for receiving (external), 1 for change (internal). Should not be any other value!
Future<void> _addToAddressesArrayForChain(
String address, int chain, DerivePathType derivePathType) async {
String chainArray = '';
if (chain == 0) {
chainArray = 'receivingAddresses';
} else {
chainArray = 'changeAddresses';
}
switch (derivePathType) {
case DerivePathType.bip44:
chainArray += "P2PKH";
break;
case DerivePathType.bip49:
chainArray += "P2SH";
break;
case DerivePathType.bip84:
chainArray += "P2WPKH";
break;
}
final addressArray =
DB.instance.get<dynamic>(boxName: walletId, key: chainArray);
if (addressArray == null) {
Logging.instance.log(
'Attempting to add the following to $chainArray array for chain $chain:${[
address
]}',
level: LogLevel.Info);
await DB.instance
.put<dynamic>(boxName: walletId, key: chainArray, value: [address]);
} else {
// Make a deep copy of the existing list
final List<String> newArray = [];
addressArray
.forEach((dynamic _address) => newArray.add(_address as String));
newArray.add(address); // Add the address passed into the method
await DB.instance
.put<dynamic>(boxName: walletId, key: chainArray, value: newArray);
}
}
/// 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 {
// Here, we assume that chain == 1 if it isn't 0
String arrayKey = chain == 0 ? "receivingAddresses" : "changeAddresses";
switch (derivePathType) {
case DerivePathType.bip44:
arrayKey += "P2PKH";
break;
case DerivePathType.bip49:
arrayKey += "P2SH";
break;
case DerivePathType.bip84:
arrayKey += "P2WPKH";
break;
}
final internalChainArray =
DB.instance.get<dynamic>(boxName: walletId, key: arrayKey);
return internalChainArray.last as String;
}
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;
}
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<UtxoData> _fetchUtxoData() async {
final List<String> 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], _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 priceData =
await _priceAPI.getPricesAnd24hChange(baseCurrency: _prefs.currency);
Decimal currentPrice = priceData[coin]?.item1 ?? Decimal.zero;
final List<Map<String, dynamic>> outputArray = [];
int satoshiBalance = 0;
int satoshiBalancePending = 0;
for (int i = 0; i < fetchedUtxoList.length; i++) {
for (int j = 0; j < fetchedUtxoList[i].length; j++) {
int value = fetchedUtxoList[i][j]["value"] as int;
satoshiBalance += value;
final txn = await cachedElectrumXClient.getTransaction(
txHash: fetchedUtxoList[i][j]["tx_hash"] as String,
verbose: true,
coin: coin,
);
final Map<String, dynamic> utxo = {};
final int confirmations = txn["confirmations"] as int? ?? 0;
final bool confirmed = confirmations >= MINIMUM_CONFIRMATIONS;
if (!confirmed) {
satoshiBalancePending += value;
}
utxo["txid"] = txn["txid"];
utxo["vout"] = fetchedUtxoList[i][j]["tx_pos"];
utxo["value"] = value;
utxo["status"] = <String, dynamic>{};
utxo["status"]["confirmed"] = confirmed;
utxo["status"]["confirmations"] = confirmations;
utxo["status"]["block_height"] = fetchedUtxoList[i][j]["height"];
utxo["status"]["block_hash"] = txn["blockhash"];
utxo["status"]["block_time"] = txn["blocktime"];
final fiatValue = ((Decimal.fromInt(value) * currentPrice) /
Decimal.fromInt(Constants.satsPerCoin))
.toDecimal(scaleOnInfinitePrecision: 2);
utxo["rawWorth"] = fiatValue;
utxo["fiatWorth"] = fiatValue.toString();
outputArray.add(utxo);
}
}
Decimal currencyBalanceRaw =
((Decimal.fromInt(satoshiBalance) * currentPrice) /
Decimal.fromInt(Constants.satsPerCoin))
.toDecimal(scaleOnInfinitePrecision: 2);
final Map<String, dynamic> result = {
"total_user_currency": currencyBalanceRaw.toString(),
"total_sats": satoshiBalance,
"total_btc": (Decimal.fromInt(satoshiBalance) /
Decimal.fromInt(Constants.satsPerCoin))
.toDecimal(scaleOnInfinitePrecision: Constants.decimalPlaces)
.toString(),
"outputArray": outputArray,
"unconfirmed": satoshiBalancePending,
};
final dataModel = UtxoData.fromJson(result);
final List<UtxoObject> allOutputs = dataModel.unspentOutputArray;
Logging.instance
.log('Outputs fetched: $allOutputs', level: LogLevel.Info);
await _sortOutputs(allOutputs);
await DB.instance.put<dynamic>(
boxName: walletId, key: 'latest_utxo_model', value: dataModel);
await DB.instance.put<dynamic>(
boxName: walletId,
key: 'totalBalance',
value: dataModel.satoshiBalance);
return dataModel;
} catch (e, s) {
Logging.instance
.log("Output fetch unsuccessful: $e\n$s", level: LogLevel.Error);
final latestTxModel =
DB.instance.get<dynamic>(boxName: walletId, key: 'latest_utxo_model')
as models.UtxoData?;
if (latestTxModel == null) {
final emptyModel = {
"total_user_currency": "0.00",
"total_sats": 0,
"total_btc": "0",
"outputArray": <dynamic>[]
};
return UtxoData.fromJson(emptyModel);
} else {
Logging.instance
.log("Old output model located", level: LogLevel.Warning);
return latestTxModel;
}
}
}
/// 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(
DerivePathType derivePathType) async {
try {
final String currentExternalAddr =
await _getCurrentAddressForChain(0, derivePathType);
final int txCount = await getTxCount(address: currentExternalAddr);
Logging.instance.log(
'Number of txs for current receiving address $currentExternalAddr: $txCount',
level: LogLevel.Info);
if (txCount >= 1) {
// First increment the receiving index
await _incrementAddressIndexForChain(0, derivePathType);
// Check the new receiving index
String indexKey = "receivingIndex";
switch (derivePathType) {
case DerivePathType.bip44:
indexKey += "P2PKH";
break;
case DerivePathType.bip49:
indexKey += "P2SH";
break;
case DerivePathType.bip84:
indexKey += "P2WPKH";
break;
}
final newReceivingIndex =
DB.instance.get<dynamic>(boxName: walletId, key: indexKey) as int;
// Use new index to derive a new receiving address
final newReceivingAddress = await _generateAddressForChain(
0, newReceivingIndex, derivePathType);
// Add that new receiving address to the array of receiving addresses
await _addToAddressesArrayForChain(
newReceivingAddress, 0, derivePathType);
// Set the new receiving address that the service
switch (derivePathType) {
case DerivePathType.bip44:
_currentReceivingAddressP2PKH = Future(() => newReceivingAddress);
break;
case DerivePathType.bip49:
_currentReceivingAddressP2SH = Future(() => newReceivingAddress);
break;
case DerivePathType.bip84:
_currentReceivingAddress = Future(() => newReceivingAddress);
break;
}
}
} catch (e, s) {
Logging.instance.log(
"Exception rethrown from _checkReceivingAddressForTransactions($derivePathType): $e\n$s",
level: LogLevel.Error);
rethrow;
}
}
Future<void> _checkChangeAddressForTransactions(
DerivePathType derivePathType) async {
try {
final String currentExternalAddr =
await _getCurrentAddressForChain(1, derivePathType);
final int txCount = await getTxCount(address: currentExternalAddr);
Logging.instance.log(
'Number of txs for current change address $currentExternalAddr: $txCount',
level: LogLevel.Info);
if (txCount >= 1) {
// First increment the change index
await _incrementAddressIndexForChain(1, derivePathType);
// Check the new change index
String indexKey = "changeIndex";
switch (derivePathType) {
case DerivePathType.bip44:
indexKey += "P2PKH";
break;
case DerivePathType.bip49:
indexKey += "P2SH";
break;
case DerivePathType.bip84:
indexKey += "P2WPKH";
break;
}
final newChangeIndex =
DB.instance.get<dynamic>(boxName: walletId, key: indexKey) as int;
// Use new index to derive a new change address
final newChangeAddress =
await _generateAddressForChain(1, newChangeIndex, derivePathType);
// Add that new receiving address to the array of change addresses
await _addToAddressesArrayForChain(newChangeAddress, 1, derivePathType);
}
} on SocketException catch (se, s) {
Logging.instance.log(
"SocketException caught in _checkReceivingAddressForTransactions($derivePathType): $se\n$s",
level: LogLevel.Error);
return;
} catch (e, s) {
Logging.instance.log(
"Exception rethrown from _checkReceivingAddressForTransactions($derivePathType): $e\n$s",
level: LogLevel.Error);
rethrow;
}
}
Future<void> _checkCurrentReceivingAddressesForTransactions() async {
try {
for (final type in DerivePathType.values) {
await _checkReceivingAddressForTransactions(type);
}
} 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(type);
}
} 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<TransactionData> _fetchTransactionData() async {
final List<String> allAddresses = await _fetchAllOwnAddresses();
final changeAddresses = DB.instance.get<dynamic>(
boxName: walletId, key: 'changeAddressesP2WPKH') as List<dynamic>;
final changeAddressesP2PKH =
DB.instance.get<dynamic>(boxName: walletId, key: 'changeAddressesP2PKH')
as List<dynamic>;
final changeAddressesP2SH =
DB.instance.get<dynamic>(boxName: walletId, key: 'changeAddressesP2SH')
as List<dynamic>;
for (var i = 0; i < changeAddressesP2PKH.length; i++) {
changeAddresses.add(changeAddressesP2PKH[i] as String);
}
for (var i = 0; i < changeAddressesP2SH.length; i++) {
changeAddresses.add(changeAddressesP2SH[i] as String);
}
final List<Map<String, dynamic>> allTxHashes =
await _fetchHistory(allAddresses);
final cachedTransactions =
DB.instance.get<dynamic>(boxName: walletId, key: 'latest_tx_model')
as TransactionData?;
int latestTxnBlockHeight =
DB.instance.get<dynamic>(boxName: walletId, key: "storedTxnDataHeight")
as int? ??
0;
final unconfirmedCachedTransactions =
cachedTransactions?.getAllTransactions() ?? {};
unconfirmedCachedTransactions
.removeWhere((key, value) => value.confirmedStatus);
if (cachedTransactions != null) {
for (final tx in allTxHashes.toList(growable: false)) {
final txHeight = tx["height"] as int;
if (txHeight > 0 &&
txHeight < latestTxnBlockHeight - MINIMUM_CONFIRMATIONS) {
if (unconfirmedCachedTransactions[tx["tx_hash"] as String] == null) {
allTxHashes.remove(tx);
}
}
}
}
Set<String> hashes = {};
for (var element in allTxHashes) {
hashes.add(element['tx_hash'] as String);
}
await fastFetch(hashes.toList());
List<Map<String, dynamic>> allTransactions = [];
for (final txHash in allTxHashes) {
final tx = await cachedElectrumXClient.getTransaction(
txHash: txHash["tx_hash"] as String,
verbose: true,
coin: coin,
);
// Logging.instance.log("TRANSACTION: ${jsonEncode(tx)}");
// TODO fix this for sent to self transactions?
if (!_duplicateTxCheck(allTransactions, tx["txid"] as String)) {
tx["address"] = txHash["address"];
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);
final priceData =
await _priceAPI.getPricesAnd24hChange(baseCurrency: _prefs.currency);
Decimal currentPrice = priceData[coin]?.item1 ?? Decimal.zero;
final List<Map<String, dynamic>> midSortedArray = [];
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());
for (final txObject in allTransactions) {
List<String> sendersArray = [];
List<String> recipientsArray = [];
// Usually only has value when txType = 'Send'
int inputAmtSentFromWallet = 0;
// Usually has value regardless of txType due to change addresses
int outputAmtAddressedToWallet = 0;
int fee = 0;
Map<String, dynamic> midSortedTx = {};
for (int i = 0; i < (txObject["vin"] as List).length; i++) {
final input = txObject["vin"]![i] as Map;
final prevTxid = input["txid"] as String;
final prevOut = input["vout"] as int;
final tx = await _cachedElectrumXClient.getTransaction(
txHash: prevTxid,
coin: coin,
);
for (final out in tx["vout"] as List) {
if (prevOut == out["n"]) {
String? address = out["scriptPubKey"]["address"] as String?;
if (address == null && out["scriptPubKey"]["addresses"] != null) {
address = out["scriptPubKey"]["addresses"][0] as String?;
}
if (address != null) {
sendersArray.add(address);
}
}
}
}
Logging.instance.log("sendersArray: $sendersArray", level: LogLevel.Info);
for (final output in txObject["vout"] as List) {
String? address = output["scriptPubKey"]["address"] as String?;
if (address == null && output["scriptPubKey"]["addresses"] != null) {
address = output["scriptPubKey"]["addresses"][0] as String?;
}
if (address != null) {
recipientsArray.add(address);
}
}
Logging.instance
.log("recipientsArray: $recipientsArray", level: LogLevel.Info);
final foundInSenders =
allAddresses.any((element) => sendersArray.contains(element));
Logging.instance
.log("foundInSenders: $foundInSenders", level: LogLevel.Info);
// If txType = Sent, then calculate inputAmtSentFromWallet
if (foundInSenders) {
int totalInput = 0;
for (int i = 0; i < (txObject["vin"] as List).length; i++) {
final input = txObject["vin"]![i] as Map;
final prevTxid = input["txid"] as String;
final prevOut = input["vout"] as int;
final tx = await _cachedElectrumXClient.getTransaction(
txHash: prevTxid,
coin: coin,
);
for (final out in tx["vout"] as List) {
if (prevOut == out["n"]) {
inputAmtSentFromWallet +=
(Decimal.parse(out["value"]!.toString()) *
Decimal.fromInt(Constants.satsPerCoin))
.toBigInt()
.toInt();
}
}
}
totalInput = inputAmtSentFromWallet;
int totalOutput = 0;
for (final output in txObject["vout"] as List) {
final address = output["scriptPubKey"]["addresses"][0];
final value = output["value"];
final _value = (Decimal.parse(value.toString()) *
Decimal.fromInt(Constants.satsPerCoin))
.toBigInt()
.toInt();
totalOutput += _value;
if (changeAddresses.contains(address)) {
inputAmtSentFromWallet -= _value;
} else {
// change address from 'sent from' to the 'sent to' address
txObject["address"] = address;
}
}
// calculate transaction fee
fee = totalInput - totalOutput;
// subtract fee from sent to calculate correct value of sent tx
inputAmtSentFromWallet -= fee;
} else {
// counters for fee calculation
int totalOut = 0;
int totalIn = 0;
// add up received tx value
for (final output in txObject["vout"] as List) {
String? address = output["scriptPubKey"]["address"] as String?;
if (address == null && output["scriptPubKey"]["addresses"] != null) {
address = output["scriptPubKey"]["addresses"][0] as String?;
}
if (address != null) {
final value = (Decimal.parse(output["value"].toString()) *
Decimal.fromInt(Constants.satsPerCoin))
.toBigInt()
.toInt();
totalOut += value;
if (allAddresses.contains(address)) {
outputAmtAddressedToWallet += value;
}
}
}
// calculate fee for received tx
for (int i = 0; i < (txObject["vin"] as List).length; i++) {
final input = txObject["vin"][i] as Map;
final prevTxid = input["txid"] as String;
final prevOut = input["vout"] as int;
final tx = await _cachedElectrumXClient.getTransaction(
txHash: prevTxid,
coin: coin,
);
for (final out in tx["vout"] as List) {
if (prevOut == out["n"]) {
totalIn += (Decimal.parse(out["value"].toString()) *
Decimal.fromInt(Constants.satsPerCoin))
.toBigInt()
.toInt();
}
}
}
fee = totalIn - totalOut;
}
// create final tx map
midSortedTx["txid"] = txObject["txid"];
midSortedTx["confirmed_status"] = (txObject["confirmations"] != null) &&
(txObject["confirmations"] as int >= MINIMUM_CONFIRMATIONS);
midSortedTx["confirmations"] = txObject["confirmations"] ?? 0;
midSortedTx["timestamp"] = txObject["blocktime"] ??
(DateTime.now().millisecondsSinceEpoch ~/ 1000);
if (foundInSenders) {
midSortedTx["txType"] = "Sent";
midSortedTx["amount"] = inputAmtSentFromWallet;
final String worthNow =
((currentPrice * Decimal.fromInt(inputAmtSentFromWallet)) /
Decimal.fromInt(Constants.satsPerCoin))
.toDecimal(scaleOnInfinitePrecision: 2)
.toStringAsFixed(2);
midSortedTx["worthNow"] = worthNow;
midSortedTx["worthAtBlockTimestamp"] = worthNow;
} else {
midSortedTx["txType"] = "Received";
midSortedTx["amount"] = outputAmtAddressedToWallet;
final worthNow =
((currentPrice * Decimal.fromInt(outputAmtAddressedToWallet)) /
Decimal.fromInt(Constants.satsPerCoin))
.toDecimal(scaleOnInfinitePrecision: 2)
.toStringAsFixed(2);
midSortedTx["worthNow"] = worthNow;
}
midSortedTx["aliens"] = <dynamic>[];
midSortedTx["fees"] = fee;
midSortedTx["address"] = txObject["address"];
midSortedTx["inputSize"] = txObject["vin"].length;
midSortedTx["outputSize"] = txObject["vout"].length;
midSortedTx["inputs"] = txObject["vin"];
midSortedTx["outputs"] = txObject["vout"];
final int height = txObject["height"] as int;
midSortedTx["height"] = height;
if (height >= latestTxnBlockHeight) {
latestTxnBlockHeight = height;
}
midSortedArray.add(midSortedTx);
}
// sort by date ---- //TODO not sure if needed
// shouldn't be any issues with a null timestamp but I got one at some point?
midSortedArray
.sort((a, b) => (b["timestamp"] as int) - (a["timestamp"] as int));
// {
// final aT = a["timestamp"];
// final bT = b["timestamp"];
//
// if (aT == null && bT == null) {
// return 0;
// } else if (aT == null) {
// return -1;
// } else if (bT == null) {
// return 1;
// } else {
// return bT - aT;
// }
// });
// buildDateTimeChunks
final Map<String, dynamic> result = {"dateTimeChunks": <dynamic>[]};
final dateArray = <dynamic>[];
for (int i = 0; i < midSortedArray.length; i++) {
final txObject = midSortedArray[i];
final date = extractDateFromTimestamp(txObject["timestamp"] as int);
final txTimeArray = [txObject["timestamp"], date];
if (dateArray.contains(txTimeArray[1])) {
result["dateTimeChunks"].forEach((dynamic chunk) {
if (extractDateFromTimestamp(chunk["timestamp"] as int) ==
txTimeArray[1]) {
if (chunk["transactions"] == null) {
chunk["transactions"] = <Map<String, dynamic>>[];
}
chunk["transactions"].add(txObject);
}
});
} else {
dateArray.add(txTimeArray[1]);
final chunk = {
"timestamp": txTimeArray[0],
"transactions": [txObject],
};
result["dateTimeChunks"].add(chunk);
}
}
final transactionsMap = cachedTransactions?.getAllTransactions() ?? {};
transactionsMap
.addAll(TransactionData.fromJson(result).getAllTransactions());
final txModel = TransactionData.fromMap(transactionsMap);
await DB.instance.put<dynamic>(
boxName: walletId,
key: 'storedTxnDataHeight',
value: latestTxnBlockHeight);
await DB.instance.put<dynamic>(
boxName: walletId, key: 'latest_tx_model', value: txModel);
return txModel;
}
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(
int satoshiAmountToSend,
int selectedTxFeeRate,
String _recipientAddress,
bool isSendAll, {
int additionalOutputs = 0,
List<UtxoObject>? utxos,
}) async {
Logging.instance
.log("Starting coinSelection ----------", level: LogLevel.Info);
final List<UtxoObject> availableOutputs = utxos ?? outputsList;
final List<UtxoObject> spendableOutputs = [];
int spendableSatoshiValue = 0;
// Build list of spendable outputs and totaling their satoshi amount
for (var i = 0; i < availableOutputs.length; i++) {
if (availableOutputs[i].blocked == false &&
availableOutputs[i].status.confirmed == true) {
spendableOutputs.add(availableOutputs[i]);
spendableSatoshiValue += availableOutputs[i].value;
}
}
// sort spendable by age (oldest first)
spendableOutputs.sort(
(a, b) => b.status.confirmations.compareTo(a.status.confirmations));
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<UtxoObject> utxoObjectsToUse = [];
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;
}
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(
utxosToUse: utxoObjectsToUse,
utxoSigningData: utxoSigningData,
recipients: [_recipientAddress],
satoshiAmounts: [satoshisBeingUsed - 1],
))["vSize"] as int;
int feeForOneOutput = estimateTxFee(
vSize: vSizeForOneOutput,
feeRatePerKB: selectedTxFeeRate,
);
final int roughEstimate =
roughFeeEstimate(spendableOutputs.length, 1, selectedTxFeeRate);
if (feeForOneOutput < roughEstimate) {
feeForOneOutput = roughEstimate;
}
final int amount = satoshiAmountToSend - feeForOneOutput;
dynamic txn = await buildTransaction(
utxosToUse: utxoObjectsToUse,
utxoSigningData: utxoSigningData,
recipients: recipientsArray,
satoshiAmounts: [amount],
);
Map<String, dynamic> transactionObject = {
"hex": txn["hex"],
"recipient": recipientsArray[0],
"recipientAmt": amount,
"fee": feeForOneOutput,
"vSize": txn["vSize"],
};
return transactionObject;
}
final int vSizeForOneOutput = (await buildTransaction(
utxosToUse: utxoObjectsToUse,
utxoSigningData: utxoSigningData,
recipients: [_recipientAddress],
satoshiAmounts: [satoshisBeingUsed - 1],
))["vSize"] as int;
final int vSizeForTwoOutPuts = (await buildTransaction(
utxosToUse: utxoObjectsToUse,
utxoSigningData: utxoSigningData,
recipients: [
_recipientAddress,
await _getCurrentAddressForChain(1, DerivePathType.bip84),
],
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 = estimateTxFee(
vSize: vSizeForOneOutput,
feeRatePerKB: selectedTxFeeRate,
);
// Assume 2 outputs, one for recipient and one for change
final feeForTwoOutputs = 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) {
// 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 &&
satoshisBeingUsed - satoshiAmountToSend - changeOutputSize ==
feeForTwoOutputs) {
// generate new change address if current change address has been used
await _checkChangeAddressForTransactions(DerivePathType.bip84);
final String newChangeAddress =
await _getCurrentAddressForChain(1, DerivePathType.bip84);
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(
utxosToUse: utxoObjectsToUse,
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(
utxosToUse: utxoObjectsToUse,
utxoSigningData: utxoSigningData,
recipients: recipientsArray,
satoshiAmounts: recipientsAmtArray,
);
}
Map<String, dynamic> transactionObject = {
"hex": txn["hex"],
"recipient": recipientsArray[0],
"recipientAmt": recipientsAmtArray[0],
"fee": feeBeingPaid,
"vSize": txn["vSize"],
};
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(
utxosToUse: utxoObjectsToUse,
utxoSigningData: utxoSigningData,
recipients: recipientsArray,
satoshiAmounts: recipientsAmtArray,
);
Map<String, dynamic> transactionObject = {
"hex": txn["hex"],
"recipient": recipientsArray[0],
"recipientAmt": recipientsAmtArray[0],
"fee": satoshisBeingUsed - satoshiAmountToSend,
"vSize": txn["vSize"],
};
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(
utxosToUse: utxoObjectsToUse,
utxoSigningData: utxoSigningData,
recipients: recipientsArray,
satoshiAmounts: recipientsAmtArray,
);
Map<String, dynamic> transactionObject = {
"hex": txn["hex"],
"recipient": recipientsArray[0],
"recipientAmt": recipientsAmtArray[0],
"fee": satoshisBeingUsed - satoshiAmountToSend,
"vSize": txn["vSize"],
};
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(
utxosToUse: utxoObjectsToUse,
utxoSigningData: utxoSigningData,
recipients: recipientsArray,
satoshiAmounts: recipientsAmtArray,
);
Map<String, dynamic> transactionObject = {
"hex": txn["hex"],
"recipient": recipientsArray[0],
"recipientAmt": recipientsAmtArray[0],
"fee": feeForOneOutput,
"vSize": txn["vSize"],
};
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, selectedTxFeeRate,
_recipientAddress, isSendAll,
additionalOutputs: additionalOutputs + 1, utxos: utxos);
}
return 2;
}
}
Future<Map<String, dynamic>> fetchBuildTxData(
List<UtxoObject> utxosToUse,
) async {
// return data
Map<String, dynamic> results = {};
Map<String, List<String>> addressTxid = {};
// addresses to check
List<String> addressesP2PKH = [];
List<String> addressesP2SH = [];
List<String> addressesP2WPKH = [];
Logging.instance.log("utxos: $utxosToUse", level: LogLevel.Info);
try {
// Populating the addresses to check
for (var i = 0; i < utxosToUse.length; i++) {
final txid = utxosToUse[i].txid;
final tx = await _cachedElectrumXClient.getTransaction(
txHash: txid,
coin: coin,
);
Logging.instance.log("tx: ${json.encode(tx)}",
level: LogLevel.Info, printFullLength: true);
for (final output in tx["vout"] as List) {
final n = output["n"];
if (n != null && n == utxosToUse[i].vout) {
final address = output["scriptPubKey"]["addresses"][0] as String;
if (!addressTxid.containsKey(address)) {
addressTxid[address] = <String>[];
}
(addressTxid[address] as List).add(txid);
switch (addressType(address: address)) {
case DerivePathType.bip44:
addressesP2PKH.add(address);
break;
case DerivePathType.bip49:
addressesP2SH.add(address);
break;
case DerivePathType.bip84:
addressesP2WPKH.add(address);
break;
}
}
}
}
// p2pkh / bip44
final p2pkhLength = addressesP2PKH.length;
if (p2pkhLength > 0) {
final receiveDerivations = await _fetchDerivations(
chain: 0,
derivePathType: DerivePathType.bip44,
);
final changeDerivations = await _fetchDerivations(
chain: 1,
derivePathType: DerivePathType.bip44,
);
for (int i = 0; i < p2pkhLength; i++) {
// receives
final receiveDerivation = receiveDerivations[addressesP2PKH[i]];
// if a match exists it will not be null
if (receiveDerivation != null) {
final data = P2PKH(
data: PaymentData(
pubkey: Format.stringToUint8List(
receiveDerivation["pubKey"] as String)),
network: _network,
).data;
for (String tx in addressTxid[addressesP2PKH[i]]!) {
results[tx] = {
"output": data.output,
"keyPair": ECPair.fromWIF(
receiveDerivation["wif"] as String,
network: _network,
),
};
}
} else {
// if its not a receive, check change
final changeDerivation = changeDerivations[addressesP2PKH[i]];
// if a match exists it will not be null
if (changeDerivation != null) {
final data = P2PKH(
data: PaymentData(
pubkey: Format.stringToUint8List(
changeDerivation["pubKey"] as String)),
network: _network,
).data;
for (String tx in addressTxid[addressesP2PKH[i]]!) {
results[tx] = {
"output": data.output,
"keyPair": ECPair.fromWIF(
changeDerivation["wif"] as String,
network: _network,
),
};
}
}
}
}
}
// p2sh / bip49
final p2shLength = addressesP2SH.length;
if (p2shLength > 0) {
final receiveDerivations = await _fetchDerivations(
chain: 0,
derivePathType: DerivePathType.bip49,
);
final changeDerivations = await _fetchDerivations(
chain: 1,
derivePathType: DerivePathType.bip49,
);
for (int i = 0; i < p2shLength; i++) {
// receives
final receiveDerivation = receiveDerivations[addressesP2SH[i]];
// if a match exists it will not be null
if (receiveDerivation != null) {
final p2wpkh = P2WPKH(
data: PaymentData(
pubkey: Format.stringToUint8List(
receiveDerivation["pubKey"] as String)),
network: _network,
overridePrefix: namecoin.bech32!)
.data;
final redeemScript = p2wpkh.output;
final data =
P2SH(data: PaymentData(redeem: p2wpkh), network: _network).data;
for (String tx in addressTxid[addressesP2SH[i]]!) {
results[tx] = {
"output": data.output,
"keyPair": ECPair.fromWIF(
receiveDerivation["wif"] as String,
network: _network,
),
"redeemScript": redeemScript,
};
}
} else {
// if its not a receive, check change
final changeDerivation = changeDerivations[addressesP2SH[i]];
// if a match exists it will not be null
if (changeDerivation != null) {
final p2wpkh = P2WPKH(
data: PaymentData(
pubkey: Format.stringToUint8List(
changeDerivation["pubKey"] as String)),
network: _network,
overridePrefix: namecoin.bech32!)
.data;
final redeemScript = p2wpkh.output;
final data =
P2SH(data: PaymentData(redeem: p2wpkh), network: _network)
.data;
for (String tx in addressTxid[addressesP2SH[i]]!) {
results[tx] = {
"output": data.output,
"keyPair": ECPair.fromWIF(
changeDerivation["wif"] as String,
network: _network,
),
"redeemScript": redeemScript,
};
}
}
}
}
}
// p2wpkh / bip84
final p2wpkhLength = addressesP2WPKH.length;
if (p2wpkhLength > 0) {
final receiveDerivations = await _fetchDerivations(
chain: 0,
derivePathType: DerivePathType.bip84,
);
final changeDerivations = await _fetchDerivations(
chain: 1,
derivePathType: DerivePathType.bip84,
);
for (int i = 0; i < p2wpkhLength; i++) {
// receives
final receiveDerivation = receiveDerivations[addressesP2WPKH[i]];
// if a match exists it will not be null
if (receiveDerivation != null) {
final data = P2WPKH(
data: PaymentData(
pubkey: Format.stringToUint8List(
receiveDerivation["pubKey"] as String)),
network: _network,
overridePrefix: namecoin.bech32!)
.data;
for (String tx in addressTxid[addressesP2WPKH[i]]!) {
results[tx] = {
"output": data.output,
"keyPair": ECPair.fromWIF(
receiveDerivation["wif"] as String,
network: _network,
),
};
}
} else {
// if its not a receive, check change
final changeDerivation = changeDerivations[addressesP2WPKH[i]];
// if a match exists it will not be null
if (changeDerivation != null) {
final data = P2WPKH(
data: PaymentData(
pubkey: Format.stringToUint8List(
changeDerivation["pubKey"] as String)),
network: _network,
overridePrefix: namecoin.bech32!)
.data;
for (String tx in addressTxid[addressesP2WPKH[i]]!) {
results[tx] = {
"output": data.output,
"keyPair": ECPair.fromWIF(
changeDerivation["wif"] as String,
network: _network,
),
};
}
}
}
}
}
return results;
} 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<UtxoObject> utxosToUse,
required Map<String, dynamic> 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 < utxosToUse.length; i++) {
final txid = utxosToUse[i].txid;
txb.addInput(txid, utxosToUse[i].vout, null,
utxoSigningData[txid]["output"] as Uint8List, namecoin.bech32!);
}
// Add transaction output
for (var i = 0; i < recipients.length; i++) {
txb.addOutput(recipients[i], satoshiAmounts[i], namecoin.bech32!);
}
try {
// Sign the transaction accordingly
for (var i = 0; i < utxosToUse.length; i++) {
final txid = utxosToUse[i].txid;
txb.sign(
vin: i,
keyPair: utxoSigningData[txid]["keyPair"] as ECPair,
witnessValue: utxosToUse[i].value,
redeemScript: utxoSigningData[txid]["redeemScript"] as Uint8List?,
overridePrefix: namecoin.bech32!);
}
} catch (e, s) {
Logging.instance.log("Caught exception while signing transaction: $e\n$s",
level: LogLevel.Error);
rethrow;
}
final builtTx = txb.build(namecoin.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();
try {
final mnemonic = await _secureStore.read(key: '${_walletId}_mnemonic');
await _recoverWalletFromBIP32SeedPhrase(
mnemonic: mnemonic!,
maxUnusedAddressGap: maxUnusedAddressGap,
maxNumberOfIndexesToCheck: maxNumberOfIndexesToCheck,
);
longMutex = false;
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> _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<int> estimateFeeFor(int satoshiAmount, int feeRate) async {
final available = Format.decimalAmountToSatoshis(await availableBalance);
if (available == satoshiAmount) {
return satoshiAmount - sweepAllEstimate(feeRate);
} else if (satoshiAmount <= 0 || satoshiAmount > available) {
return roughFeeEstimate(1, 2, feeRate);
}
int runningBalance = 0;
int inputCount = 0;
for (final output in outputsList) {
runningBalance += output.value;
inputCount++;
if (runningBalance > satoshiAmount) {
break;
}
}
final oneOutPutFee = roughFeeEstimate(inputCount, 1, feeRate);
final twoOutPutFee = roughFeeEstimate(inputCount, 2, feeRate);
if (runningBalance - satoshiAmount > oneOutPutFee) {
if (runningBalance - satoshiAmount > oneOutPutFee + DUST_LIMIT) {
final change = runningBalance - satoshiAmount - twoOutPutFee;
if (change > DUST_LIMIT &&
runningBalance - satoshiAmount - change == twoOutPutFee) {
return runningBalance - satoshiAmount - change;
} else {
return runningBalance - satoshiAmount;
}
} else {
return runningBalance - satoshiAmount;
}
} else if (runningBalance - satoshiAmount == oneOutPutFee) {
return oneOutPutFee;
} else {
return twoOutPutFee;
}
}
// TODO: Check if this is the correct formula for namecoin
int roughFeeEstimate(int inputCount, int outputCount, int feeRatePerKB) {
return ((42 + (272 * inputCount) + (128 * outputCount)) / 4).ceil() *
(feeRatePerKB / 1000).ceil();
}
int sweepAllEstimate(int feeRate) {
int available = 0;
int inputCount = 0;
for (final output in outputsList) {
if (output.status.confirmed) {
available += output.value;
inputCount++;
}
}
// transaction will only have 1 output minus the fee
final estimatedFee = roughFeeEstimate(inputCount, 1, feeRate);
return available - estimatedFee;
}
@override
Future<bool> generateNewAddress() async {
try {
await _incrementAddressIndexForChain(
0, DerivePathType.bip84); // First increment the receiving index
final newReceivingIndex = DB.instance.get<dynamic>(
boxName: walletId,
key: 'receivingIndexP2WPKH') as int; // Check the new receiving index
final newReceivingAddress = await _generateAddressForChain(
0,
newReceivingIndex,
DerivePathType
.bip84); // Use new index to derive a new receiving address
await _addToAddressesArrayForChain(
newReceivingAddress,
0,
DerivePathType
.bip84); // Add that new receiving address to the array of receiving addresses
_currentReceivingAddress = Future(() =>
newReceivingAddress); // Set the new receiving address that the service
return true;
} catch (e, s) {
Logging.instance.log(
"Exception rethrown from generateNewAddress(): $e\n$s",
level: LogLevel.Error);
return false;
}
}
}
// 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
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