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stack_wallet/lib/services/coins/bitcoincash/bitcoincash_wallet.dart

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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';
// import 'package:bitbox/bitbox.dart' as Bitbox;
//
// const int MINIMUM_CONFIRMATIONS = 3;
// const int DUST_LIMIT = 546;
//
// const String GENESIS_HASH_MAINNET =
// "000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f";
// const String GENESIS_HASH_TESTNET =
// "000000000933ea01ad0ee984209779baaec3ced90fa3f408719526f8d77f4943";
//
// enum DerivePathType { bip44 }
//
// 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 0x80: // bch mainnet wif
// coinType = "145"; // bch mainnet
// break;
// case 0xef: // bch testnet wif
// coinType = "1"; // bch testnet
// break;
// default:
// throw Exception("Invalid Bitcoincash network type used!");
// }
// switch (derivePathType) {
// case DerivePathType.bip44:
// return root.derivePath("m/44'/$coinType'/0'/$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 BitcoinCashWallet 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.bitcoincash:
// return bitcoincash;
// case Coin.bitcoincashTestnet:
// return bitcoincashtestnet;
// default:
// throw Exception("Bitcoincash network type not set!");
// }
// }
//
// List<UtxoObject> outputsList = [];
//
// @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 =>
// _currentReceivingAddressP2PKH ??=
// _getCurrentAddressForChain(0, DerivePathType.bip44);
//
// Future<String>? _currentReceivingAddressP2PKH;
//
// @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;
// final satsFee =
// Format.satoshisToAmount(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;
// }
// }
//
// Future<int> get storedChainHeight async {
// final storedHeight = DB.instance
// .get<dynamic>(boxName: walletId, key: "storedChainHeight") as int?;
// return storedHeight ?? 0;
// }
//
// Future<void> updateStoredChainHeight({required int newHeight}) async {
// 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;
// }
// throw ArgumentError('Invalid version or Network mismatch');
// } else {
// try {
// decodeBech32 = segwit.decode(address);
// } 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');
// }
// }
// throw ArgumentError('$address has no matching Script');
// }
//
// 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.bitcoincash:
// if (features['genesis_hash'] != GENESIS_HASH_MAINNET) {
// throw Exception("genesis hash does not match main net!");
// }
// break;
// case Coin.bitcoincashTestnet:
// if (features['genesis_hash'] != GENESIS_HASH_TESTNET) {
// throw Exception("genesis hash does not match test net!");
// }
// break;
// default:
// throw Exception(
// "Attempted to generate a BitcoinCashWallet using a non bch coin type: ${coin.name}");
// }
// }
// // check to make sure we aren't overwriting a mnemonic
// // this should never fail
// if ((await _secureStore.read(key: '${_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<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>> p2pkhChangeDerivations = {};
//
// final root = await compute(getBip32RootWrapper, Tuple2(mnemonic, _network));
//
// List<String> p2pkhReceiveAddressArray = [];
// int p2pkhReceiveIndex = -1;
//
// List<String> p2pkhChangeAddressArray = [];
// int p2pkhChangeIndex = -1;
//
// // The gap limit will be capped at [maxUnusedAddressGap]
// int receivingGapCounter = 0;
// int changeGapCounter = 0;
//
// // actual size is 12 due to p2pkh so 12x1
// const txCountBatchSize = 12;
//
// try {
// // receiving addresses
// Logging.instance
// .log("checking receiving addresses...", level: LogLevel.Info);
// for (int index = 0;
// index < maxNumberOfIndexesToCheck &&
// receivingGapCounter < maxUnusedAddressGap;
// index += txCountBatchSize) {
// Logging.instance.log(
// "index: $index, \t receivingGapCounter: $receivingGapCounter",
// level: LogLevel.Info);
//
// final receivingP2pkhID = "k_$index";
// Map<String, String> txCountCallArgs = {};
// final Map<String, dynamic> receivingNodes = {};
//
// for (int j = 0; j < txCountBatchSize; j++) {
// // bip44 / P2PKH
// final node44 = await compute(
// getBip32NodeFromRootWrapper,
// Tuple4(
// 0,
// index + j,
// root,
// DerivePathType.bip44,
// ),
// );
// final p2pkhReceiveAddress = P2PKH(
// data: PaymentData(pubkey: node44.publicKey),
// network: _network)
// .data
// .address!;
// receivingNodes.addAll({
// "${receivingP2pkhID}_$j": {
// "node": node44,
// "address": p2pkhReceiveAddress,
// }
// });
// txCountCallArgs.addAll({
// "${receivingP2pkhID}_$j": p2pkhReceiveAddress,
// });
// }
//
// // get address tx counts
// final counts = await _getBatchTxCount(addresses: txCountCallArgs);
//
// // check and add appropriate addresses
// for (int k = 0; k < txCountBatchSize; k++) {
// int p2pkhTxCount = counts["${receivingP2pkhID}_$k"]!;
// if (p2pkhTxCount > 0) {
// final node = receivingNodes["${receivingP2pkhID}_$k"];
// // add address to array
// p2pkhReceiveAddressArray.add(node["address"] as String);
// // set current index
// p2pkhReceiveIndex = index + k;
// // reset counter
// receivingGapCounter = 0;
// // add info to derivations
// p2pkhReceiveDerivations[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 (p2pkhTxCount == 0) {
// receivingGapCounter++;
// }
// }
// }
//
// Logging.instance
// .log("checking change addresses...", level: LogLevel.Info);
// // change addresses
// for (int index = 0;
// index < maxNumberOfIndexesToCheck &&
// changeGapCounter < maxUnusedAddressGap;
// index += txCountBatchSize) {
// Logging.instance.log(
// "index: $index, \t changeGapCounter: $changeGapCounter",
// level: LogLevel.Info);
// final changeP2pkhID = "k_$index";
// Map<String, String> args = {};
// final Map<String, dynamic> changeNodes = {};
//
// for (int j = 0; j < txCountBatchSize; j++) {
// // bip44 / P2PKH
// final node44 = await compute(
// getBip32NodeFromRootWrapper,
// Tuple4(
// 1,
// index + j,
// root,
// DerivePathType.bip44,
// ),
// );
// final p2pkhChangeAddress = P2PKH(
// data: PaymentData(pubkey: node44.publicKey),
// network: _network)
// .data
// .address!;
// changeNodes.addAll({
// "${changeP2pkhID}_$j": {
// "node": node44,
// "address": p2pkhChangeAddress,
// }
// });
// args.addAll({
// "${changeP2pkhID}_$j": p2pkhChangeAddress,
// });
// }
//
// // get address tx counts
// final counts = await _getBatchTxCount(addresses: args);
//
// // check and add appropriate addresses
// for (int k = 0; k < txCountBatchSize; k++) {
// int p2pkhTxCount = counts["${changeP2pkhID}_$k"]!;
// if (p2pkhTxCount > 0) {
// final node = changeNodes["${changeP2pkhID}_$k"];
// // add address to array
// p2pkhChangeAddressArray.add(node["address"] as String);
// // set current index
// p2pkhChangeIndex = index + k;
// // reset counter
// changeGapCounter = 0;
// // add info to derivations
// p2pkhChangeDerivations[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 (p2pkhTxCount == 0) {
// changeGapCounter++;
// }
// }
// }
//
// // save the derivations (if any)
// if (p2pkhReceiveDerivations.isNotEmpty) {
// await addDerivations(
// chain: 0,
// derivePathType: DerivePathType.bip44,
// derivationsToAdd: p2pkhReceiveDerivations);
// }
// if (p2pkhChangeDerivations.isNotEmpty) {
// await addDerivations(
// chain: 1,
// derivePathType: DerivePathType.bip44,
// derivationsToAdd: p2pkhChangeDerivations);
// }
//
// // 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 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;
// }
//
// 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: 'receivingIndexP2PKH',
// value: p2pkhReceiveIndex);
// await DB.instance.put<dynamic>(
// boxName: walletId, key: 'changeIndexP2PKH', value: p2pkhChangeIndex);
// 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.Info);
//
// 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;
// Logging.instance.log(
// "notified unconfirmed transactions: ${txTracker.pendings}",
// level: LogLevel.Info);
// 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);
// var confirmations = txn["confirmations"];
// if (confirmations is! int) continue;
// 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.Info);
// rethrow;
// }
// }
//
// Future<void> getAllTxsToWatch(
// TransactionData txData,
// ) async {
// if (_hasCalledExit) return;
// List<models.Transaction> unconfirmedTxnsToNotifyPending = [];
// List<models.Transaction> unconfirmedTxnsToNotifyConfirmed = [];
//
// // Get all unconfirmed incoming transactions
// for (final chunk in txData.txChunks) {
// for (final tx in chunk.transactions) {
// if (tx.confirmedStatus) {
// if (txTracker.wasNotifiedPending(tx.txid) &&
// !txTracker.wasNotifiedConfirmed(tx.txid)) {
// unconfirmedTxnsToNotifyConfirmed.add(tx);
// }
// } else {
// if (!txTracker.wasNotifiedPending(tx.txid)) {
// unconfirmedTxnsToNotifyPending.add(tx);
// }
// }
// }
// }
//
// // notify on new incoming transaction
// for (final tx in unconfirmedTxnsToNotifyPending) {
// if (tx.txType == "Received") {
// NotificationApi.showNotification(
// title: "Incoming transaction",
// body: walletName,
// walletId: walletId,
// iconAssetName: Assets.svg.iconFor(coin: coin),
// date: DateTime.now(),
// 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") {
// 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") {
// NotificationApi.showNotification(
// title: "Incoming transaction confirmed",
// body: walletName,
// walletId: walletId,
// iconAssetName: Assets.svg.iconFor(coin: coin),
// date: DateTime.now(),
// shouldWatchForUpdates: false,
// coinName: coin.name,
// );
//
// await txTracker.addNotifiedConfirmed(tx.txid);
// } else if (tx.txType == "Sent") {
// NotificationApi.showNotification(
// title: "Outgoing transaction confirmed",
// body: walletName,
// walletId: walletId,
// iconAssetName: Assets.svg.iconFor(coin: coin),
// date: DateTime.now(),
// shouldWatchForUpdates: false,
// coinName: coin.name,
// );
// await txTracker.addNotifiedConfirmed(tx.txid);
// }
// }
// }
//
// bool refreshMutex = false;
//
// 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();
// }
// }
// }
//
// //TODO Show percentages properly/more consistently
// /// Refreshes display data for the wallet
// @override
// Future<void> refresh() async {
// final bchaddr = Bitbox.Address.toCashAddress(await currentReceivingAddress);
// print("bchaddr: $bchaddr ${await currentReceivingAddress}");
//
// if (refreshMutex) {
// Logging.instance.log("$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
// updateStoredChainHeight(newHeight: currentHeight);
// }
//
// GlobalEventBus.instance.fire(RefreshPercentChangedEvent(0.2, walletId));
// await _checkChangeAddressForTransactions(DerivePathType.bip44);
//
// GlobalEventBus.instance.fire(RefreshPercentChangedEvent(0.3, walletId));
// await _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));
//
// await getAllTxsToWatch(await newTxData);
// GlobalEventBus.instance
// .fire(RefreshPercentChangedEvent(0.90, walletId));
// }
//
// GlobalEventBus.instance.fire(RefreshPercentChangedEvent(1.0, walletId));
// GlobalEventBus.instance.fire(
// WalletSyncStatusChangedEvent(
// WalletSyncStatus.synced,
// walletId,
// coin,
// ),
// );
// refreshMutex = false;
//
// if (shouldAutoSync) {
// timer ??= Timer.periodic(const Duration(seconds: 150), (timer) async {
// // 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 result =
// await coinSelection(satoshiAmount, rate, address, isSendAll);
// Logging.instance.log("SEND RESULT: $result", level: LogLevel.Info);
// if (result is int) {
// switch (result) {
// case 1:
// throw Exception("Insufficient balance!");
// case 2:
// throw Exception("Insufficient funds to pay for transaction fee!");
// default:
// throw Exception("Transaction failed with error code $result");
// }
// } else {
// final hex = result["hex"];
// if (hex is String) {
// final fee = result["fee"] as int;
// final vSize = result["vSize"] as int;
//
// Logging.instance.log("txHex: $hex", level: LogLevel.Info);
// Logging.instance.log("fee: $fee", level: LogLevel.Info);
// Logging.instance.log("vsize: $vSize", level: LogLevel.Info);
// // fee should never be less than vSize sanity check
// if (fee < vSize) {
// throw Exception(
// "Error in fee calculation: Transaction fee cannot be less than vSize");
// }
// return result as Map<String, dynamic>;
// } else {
// throw Exception("sent hex is not a String!!!");
// }
// }
// } else {
// 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({dynamic txData}) async {
// try {
// Logging.instance.log("confirmSend txData: $txData", level: LogLevel.Info);
// final txHash = await _electrumXClient.broadcastTransaction(
// rawTx: txData["hex"] as String);
// 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) {
// try {
// // 0 for bitcoincash: address scheme, 1 for legacy address
// final format = Bitbox.Address.detectFormat(address);
// print("format $format");
// return true;
// } catch (e, s) {
// return false;
// }
// }
//
// @override
// String get walletId => _walletId;
// late String _walletId;
//
// @override
// String get walletName => _walletName;
// late String _walletName;
//
// // setter for updating on rename
// @override
// set walletName(String newName) => _walletName = newName;
//
// late ElectrumX _electrumXClient;
//
// ElectrumX get electrumXClient => _electrumXClient;
//
// late CachedElectrumX _cachedElectrumXClient;
//
// CachedElectrumX get cachedElectrumXClient => _cachedElectrumXClient;
//
// late FlutterSecureStorageInterface _secureStore;
//
// late PriceAPI _priceAPI;
//
// BitcoinCashWallet({
// required String walletId,
// required String walletName,
// required Coin coin,
// required ElectrumX client,
// required CachedElectrumX cachedClient,
// required TransactionNotificationTracker tracker,
// PriceAPI? priceAPI,
// FlutterSecureStorageInterface? secureStore,
// }) {
// txTracker = tracker;
// _walletId = walletId;
// _walletName = walletName;
// _coin = coin;
// _electrumXClient = client;
// _cachedElectrumXClient = cachedClient;
//
// _priceAPI = priceAPI ?? PriceAPI(Client());
// _secureStore =
// secureStore ?? const SecureStorageWrapper(FlutterSecureStorage());
// }
//
// @override
// Future<void> updateNode(bool shouldRefresh) async {
// final failovers = NodeService()
// .failoverNodesFor(coin: coin)
// .map((e) => ElectrumXNode(
// address: e.host,
// port: e.port,
// name: e.name,
// id: e.id,
// useSSL: e.useSSL,
// ))
// .toList();
// final newNode = await getCurrentNode();
// _cachedElectrumXClient = CachedElectrumX.from(
// node: newNode,
// prefs: _prefs,
// failovers: failovers,
// );
// _electrumXClient = ElectrumX.from(
// node: newNode,
// prefs: _prefs,
// failovers: failovers,
// );
//
// if (shouldRefresh) {
// refresh();
// }
// }
//
// Future<List<String>> _getMnemonicList() async {
// final mnemonicString =
// await _secureStore.read(key: '${_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 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>;
//
// // for (var i = 0; i < receivingAddresses.length; i++) {
// // if (!allAddresses.contains(receivingAddresses[i])) {
// // allAddresses.add(receivingAddresses[i]);
// // }
// // }
// // for (var i = 0; i < changeAddresses.length; i++) {
// // if (!allAddresses.contains(changeAddresses[i])) {
// // allAddresses.add(changeAddresses[i]);
// // }
// // }
// 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);
// }
// }
// 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.bitcoincash:
// if (features['genesis_hash'] != GENESIS_HASH_MAINNET) {
// throw Exception("genesis hash does not match main net!");
// }
// break;
// case Coin.bitcoincashTestnet:
// if (features['genesis_hash'] != GENESIS_HASH_TESTNET) {
// throw Exception("genesis hash does not match test net!");
// }
// break;
// default:
// throw Exception(
// "Attempted to generate a BitcoinWallet using a non bitcoin 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: "receivingIndexP2PKH", value: 0);
// await DB.instance
// .put<dynamic>(boxName: walletId, key: "changeIndexP2PKH", 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
// // final initialReceivingAddress =
// // await _generateAddressForChain(0, 0, DerivePathType.bip44);
// // final initialChangeAddress =
// // await _generateAddressForChain(1, 0, DerivePathType.bip44);
// final initialReceivingAddressP2PKH =
// await _generateAddressForChain(0, 0, DerivePathType.bip44);
// final initialChangeAddressP2PKH =
// await _generateAddressForChain(1, 0, DerivePathType.bip44);
//
// // await _addToAddressesArrayForChain(
// // initialReceivingAddress, 0, DerivePathType.bip44);
// // await _addToAddressesArrayForChain(
// // initialChangeAddress, 1, DerivePathType.bip44);
// await _addToAddressesArrayForChain(
// initialReceivingAddressP2PKH, 0, DerivePathType.bip44);
// await _addToAddressesArrayForChain(
// initialChangeAddressP2PKH, 1, DerivePathType.bip44);
//
// // this._currentReceivingAddress = Future(() => initialReceivingAddress);
// _currentReceivingAddressP2PKH = Future(() => initialReceivingAddressP2PKH);
//
// Logging.instance.log("_generateNewWalletFinished", level: LogLevel.Info);
// }
//
// /// Generates a new internal or external chain address for the wallet using a BIP44 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;
// // default:
// // // should never hit this due to all enum cases handled
// // return null;
// }
//
// // 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;
// }
//
// 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;
// }
//
// 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;
// }
// 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;
// }
// 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 = 10;
// 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 = txn["confirmations"] == null
// ? false
// : txn["confirmations"] as int >= 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');
//
// 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 as models.UtxoData;
// }
// }
// }
//
// /// 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;
// }
// print("result ${jsonEncode(result)}");
// 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: $txCount',
// level: LogLevel.Info);
//
// if (txCount >= 1) {
// // First increment the receiving index
// await _incrementAddressIndexForChain(0, derivePathType);
//
// // Check the new receiving index
// String indexKey = "receivingIndex";
// switch (derivePathType) {
// case DerivePathType.bip44:
// indexKey += "P2PKH";
// break;
// }
// final newReceivingIndex =
// DB.instance.get<dynamic>(boxName: walletId, key: indexKey) as int;
//
// // Use new index to derive a new receiving address
// final newReceivingAddress = await _generateAddressForChain(
// 0, newReceivingIndex, derivePathType);
//
// // Add that new receiving address to the array of receiving addresses
// await _addToAddressesArrayForChain(
// newReceivingAddress, 0, derivePathType);
//
// // Set the new receiving address that the service
//
// switch (derivePathType) {
// case DerivePathType.bip44:
// _currentReceivingAddressP2PKH = Future(() => newReceivingAddress);
// break;
// }
// }
// } on SocketException catch (se, s) {
// Logging.instance.log(
// "SocketException caught in _checkReceivingAddressForTransactions($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> _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: $txCount',
// level: LogLevel.Info);
//
// if (txCount >= 1) {
// // First increment the change index
// await _incrementAddressIndexForChain(1, derivePathType);
//
// // Check the new change index
// String indexKey = "changeIndex";
// switch (derivePathType) {
// case DerivePathType.bip44:
// indexKey += "P2PKH";
// break;
// }
// final newChangeIndex =
// DB.instance.get<dynamic>(boxName: walletId, key: indexKey) as int;
//
// // Use new index to derive a new change address
// final newChangeAddress =
// await _generateAddressForChain(1, newChangeIndex, derivePathType);
//
// // Add that new receiving address to the array of change addresses
// await _addToAddressesArrayForChain(newChangeAddress, 1, derivePathType);
// }
// } catch (e, s) {
// Logging.instance.log(
// "Exception rethrown from _checkChangeAddressForTransactions($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.Info);
// 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 bch address
// String _convertToScriptHash(String bchAddress, NetworkType network) {
// try {
// final output = Address.addressToOutputScript(bchAddress, network);
// 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 = 10;
// 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<TransactionData> _fetchTransactionData() async {
// final List<String> allAddresses = await _fetchAllOwnAddresses();
//
// final changeAddressesP2PKH =
// DB.instance.get<dynamic>(boxName: walletId, key: 'changeAddressesP2PKH')
// as List<dynamic>;
//
// 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);
//
// print("CACHED_TRANSACTIONS_IS $cachedTransactions");
// 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);
// }
// }
// }
// }
//
// List<Map<String, dynamic>> allTransactions = [];
//
// for (final txHash in allTxHashes) {
// Logging.instance.log("bch: $txHash", level: LogLevel.Info);
// 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 = [];
//
// 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"]) {
// final 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) {
// final 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 (changeAddressesP2PKH.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) {
// final address = output["scriptPubKey"]["addresses"][0];
// 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);
// Logging.instance
// .log('satoshiAmountToSend $satoshiAmountToSend', 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,
// );
// if (feeForOneOutput < (vSizeForOneOutput + 1)) {
// feeForOneOutput = (vSizeForOneOutput + 1);
// }
//
// 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.bip44),
// ],
// satoshiAmounts: [
// satoshiAmountToSend,
// satoshisBeingUsed - satoshiAmountToSend - 1,
// ], // dust limit is the minimum amount a change output should be
// ))["vSize"] as int;
// debugPrint("vSizeForOneOutput $vSizeForOneOutput");
// debugPrint("vSizeForTwoOutPuts $vSizeForTwoOutPuts");
//
// // Assume 1 output, only for recipient and no change
// var feeForOneOutput = estimateTxFee(
// vSize: vSizeForOneOutput,
// feeRatePerKB: selectedTxFeeRate,
// );
// // Assume 2 outputs, one for recipient and one for change
// var feeForTwoOutputs = estimateTxFee(
// vSize: vSizeForTwoOutPuts,
// feeRatePerKB: selectedTxFeeRate,
// );
//
// Logging.instance
// .log("feeForTwoOutputs: $feeForTwoOutputs", level: LogLevel.Info);
// Logging.instance
// .log("feeForOneOutput: $feeForOneOutput", level: LogLevel.Info);
// if (feeForOneOutput < (vSizeForOneOutput + 1)) {
// feeForOneOutput = (vSizeForOneOutput + 1);
// }
// if (feeForTwoOutputs < ((vSizeForTwoOutPuts + 1))) {
// feeForTwoOutputs = ((vSizeForTwoOutPuts + 1));
// }
//
// 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 > 546 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.bip44);
// final String newChangeAddress =
// await _getCurrentAddressForChain(1, DerivePathType.bip44);
//
// 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 546 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 = [];
//
// 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,
// );
//
// 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;
// }
// }
// }
// }
//
// // 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,
// ),
// };
// }
// }
// }
// }
// }
//
// 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 {
// final builder = Bitbox.Bitbox.transactionBuilder();
//
// // retrieve address' utxos from the rest api
// List<Bitbox.Utxo> _utxos =
// []; // await Bitbox.Address.utxo(address) as List<Bitbox.Utxo>;
// utxosToUse.forEach((element) {
// _utxos.add(Bitbox.Utxo(
// element.txid,
// element.vout,
// Bitbox.BitcoinCash.fromSatoshi(element.value),
// element.value,
// 0,
// MINIMUM_CONFIRMATIONS + 1));
// });
// Logger.print("bch utxos: ${_utxos}");
//
// // placeholder for input signatures
// final signatures = <Map>[];
//
// // placeholder for total input balance
// int totalBalance = 0;
//
// // iterate through the list of address _utxos and use them as inputs for the
// // withdrawal transaction
// _utxos.forEach((Bitbox.Utxo utxo) {
// // add the utxo as an input for the transaction
// builder.addInput(utxo.txid, utxo.vout);
// final ec = utxoSigningData[utxo.txid]["keyPair"] as ECPair;
//
// final bitboxEC = Bitbox.ECPair.fromWIF(ec.toWIF());
//
// // add a signature to the list to be used later
// signatures.add({
// "vin": signatures.length,
// "key_pair": bitboxEC,
// "original_amount": utxo.satoshis
// });
//
// totalBalance += utxo.satoshis;
// });
//
// // calculate the fee based on number of inputs and one expected output
// final fee =
// Bitbox.BitcoinCash.getByteCount(signatures.length, recipients.length);
//
// // calculate how much balance will be left over to spend after the fee
// final sendAmount = totalBalance - fee;
//
// // add the output based on the address provided in the testing data
// for (int i = 0; i < recipients.length; i++) {
// String recipient = recipients[i];
// int satoshiAmount = satoshiAmounts[i];
// builder.addOutput(recipient, satoshiAmount);
// }
//
// // sign all inputs
// signatures.forEach((signature) {
// builder.sign(
// signature["vin"] as int,
// signature["key_pair"] as Bitbox.ECPair,
// signature["original_amount"] as int);
// });
//
// // build the transaction
// final tx = builder.build();
// final txHex = tx.toHex();
// final vSize = tx.virtualSize();
// Logger.print("bch raw hex: $txHex");
//
// return {"hex": txHex, "vSize": vSize};
// }
//
// @override
// Future<void> fullRescan(
// int maxUnusedAddressGap,
// int maxNumberOfIndexesToCheck,
// ) async {
// Logging.instance.log("Starting full rescan!", level: LogLevel.Info);
// longMutex = true;
// GlobalEventBus.instance.fire(
// WalletSyncStatusChangedEvent(
// WalletSyncStatus.syncing,
// walletId,
// coin,
// ),
// );
//
// // clear cache
// _cachedElectrumXClient.clearSharedTransactionCache(coin: coin);
//
// // back up data
// await _rescanBackup();
//
// try {
// final mnemonic = await _secureStore.read(key: '${_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);
//
// // 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");
//
// // 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);
//
// // 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");
//
// // 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);
// }
//
// @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
// bool get isRefreshing => refreshMutex;
//
// 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: correct formula for bch?
// int roughFeeEstimate(int inputCount, int outputCount, int feeRatePerKB) {
// return ((181 * inputCount) + (34 * outputCount) + 10) *
// (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.bip44); // First increment the receiving index
// final newReceivingIndex = DB.instance.get<dynamic>(
// boxName: walletId,
// key: 'receivingIndexP2PKH') as int; // Check the new receiving index
// final newReceivingAddress = await _generateAddressForChain(
// 0,
// newReceivingIndex,
// DerivePathType
// .bip44); // Use new index to derive a new receiving address
// await _addToAddressesArrayForChain(
// newReceivingAddress,
// 0,
// DerivePathType
// .bip44); // Add that new receiving address to the array of receiving addresses
// _currentReceivingAddressP2PKH = 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;
// }
// }
// }
//
// // Bitcoincash Network
// final bitcoincash = NetworkType(
// messagePrefix: '\x18Bitcoin Signed Message:\n',
// bech32: 'bc',
// bip32: Bip32Type(public: 0x0488b21e, private: 0x0488ade4),
// pubKeyHash: 0x00,
// scriptHash: 0x05,
// wif: 0x80);
//
// final bitcoincashtestnet = NetworkType(
// messagePrefix: '\x18Bitcoin Signed Message:\n',
// bech32: 'tb',
// bip32: Bip32Type(public: 0x043587cf, private: 0x04358394),
// pubKeyHash: 0x6f,
// scriptHash: 0xc4,
// wif: 0xef);
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