2023-11-14 15:55:37 +00:00
// /*
// * This file is part of Stack Wallet.
// *
// * Copyright (c) 2023 Cypher Stack
// * All Rights Reserved.
// * The code is distributed under GPLv3 license, see LICENSE file for details.
// * Generated by Cypher Stack on 2023-05-26
// *
// */
//
// import 'dart:async';
// import 'dart:io';
// import 'dart:math';
//
// import 'package:bech32/bech32.dart';
// import 'package:bip32/bip32.dart' as bip32;
// import 'package:bip39/bip39.dart' as bip39;
// import 'package:bitbox/bitbox.dart' as bitbox;
// import 'package:bitcoindart/bitcoindart.dart';
// import 'package:bs58check/bs58check.dart' as bs58check;
// import 'package:decimal/decimal.dart';
// import 'package:flutter/foundation.dart';
// import 'package:isar/isar.dart';
// import 'package:stackwallet/db/isar/main_db.dart';
// import 'package:stackwallet/electrumx_rpc/cached_electrumx.dart';
// import 'package:stackwallet/electrumx_rpc/electrumx.dart';
// import 'package:stackwallet/exceptions/electrumx/no_such_transaction.dart';
// import 'package:stackwallet/models/balance.dart';
// import 'package:stackwallet/models/isar/models/isar_models.dart' as isar_models;
// import 'package:stackwallet/models/paymint/fee_object_model.dart';
// import 'package:stackwallet/models/signing_data.dart';
// import 'package:stackwallet/services/coins/coin_service.dart';
// import 'package:stackwallet/services/event_bus/events/global/node_connection_status_changed_event.dart';
// import 'package:stackwallet/services/event_bus/events/global/refresh_percent_changed_event.dart';
// import 'package:stackwallet/services/event_bus/events/global/updated_in_background_event.dart';
// import 'package:stackwallet/services/event_bus/events/global/wallet_sync_status_changed_event.dart';
// import 'package:stackwallet/services/event_bus/global_event_bus.dart';
// import 'package:stackwallet/services/mixins/coin_control_interface.dart';
// import 'package:stackwallet/services/mixins/electrum_x_parsing.dart';
// import 'package:stackwallet/services/mixins/wallet_cache.dart';
// import 'package:stackwallet/services/mixins/wallet_db.dart';
// import 'package:stackwallet/services/mixins/xpubable.dart';
// import 'package:stackwallet/services/node_service.dart';
// import 'package:stackwallet/services/transaction_notification_tracker.dart';
// import 'package:stackwallet/utilities/address_utils.dart';
// import 'package:stackwallet/utilities/amount/amount.dart';
// import 'package:stackwallet/utilities/bip32_utils.dart';
// import 'package:stackwallet/utilities/constants.dart';
// import 'package:stackwallet/utilities/default_nodes.dart';
// import 'package:stackwallet/utilities/enums/coin_enum.dart';
// import 'package:stackwallet/utilities/enums/derive_path_type_enum.dart';
// import 'package:stackwallet/utilities/enums/fee_rate_type_enum.dart';
// import 'package:stackwallet/utilities/flutter_secure_storage_interface.dart';
// import 'package:stackwallet/utilities/logger.dart';
// import 'package:stackwallet/utilities/prefs.dart';
// import 'package:stackwallet/widgets/crypto_notifications.dart';
// import 'package:tuple/tuple.dart';
// import 'package:uuid/uuid.dart';
//
// class ECashWallet extends CoinServiceAPI
// with WalletCache, WalletDB, ElectrumXParsing, CoinControlInterface
// implements XPubAble {
// ECashWallet({
// required String walletId,
// required String walletName,
// required Coin coin,
// required ElectrumX client,
// required CachedElectrumX cachedClient,
// required TransactionNotificationTracker tracker,
// required SecureStorageInterface secureStore,
// MainDB? mockableOverride,
// }) {
// txTracker = tracker;
// _walletId = walletId;
// _walletName = walletName;
// _coin = coin;
// _electrumXClient = client;
// _cachedElectrumXClient = cachedClient;
// _secureStore = secureStore;
// initCache(walletId, coin);
// initWalletDB(mockableOverride: mockableOverride);
// initCoinControlInterface(
// walletId: walletId,
// walletName: walletName,
// coin: coin,
// db: db,
// getChainHeight: () => chainHeight,
// refreshedBalanceCallback: (balance) async {
// _balance = balance;
// await updateCachedBalance(_balance!);
// },
// );
// }
//
// static const integrationTestFlag =
// bool.fromEnvironment("IS_INTEGRATION_TEST");
//
// final _prefs = Prefs.instance;
//
// Timer? timer;
// late final Coin _coin;
//
// late final TransactionNotificationTracker txTracker;
//
// @override
// Future<List<isar_models.UTXO>> get utxos => db.getUTXOs(walletId).findAll();
//
// @override
// Future<List<isar_models.Transaction>> get transactions => db
// .getTransactions(walletId)
// .filter()
// .not()
// .group((q) => q
// .subTypeEqualTo(isar_models.TransactionSubType.bip47Notification)
// .and()
// .typeEqualTo(isar_models.TransactionType.incoming))
// .sortByTimestampDesc()
// .findAll();
//
// @override
// Future<void> exit() async {
// _hasCalledExit = true;
// timer?.cancel();
// timer = null;
// stopNetworkAlivePinging();
// }
//
// Future<FeeObject> _getFees() async {
// try {
// //TODO adjust numbers for different speeds?
// const int f = 1, m = 5, s = 20;
//
// final fast = await electrumXClient.estimateFee(blocks: f);
// final medium = await electrumXClient.estimateFee(blocks: m);
// final slow = await electrumXClient.estimateFee(blocks: s);
//
// final feeObject = FeeObject(
// numberOfBlocksFast: f,
// numberOfBlocksAverage: m,
// numberOfBlocksSlow: s,
// fast: Amount.fromDecimal(
// fast,
// fractionDigits: coin.decimals,
// ).raw.toInt(),
// medium: Amount.fromDecimal(
// medium,
// fractionDigits: coin.decimals,
// ).raw.toInt(),
// slow: Amount.fromDecimal(
// slow,
// fractionDigits: coin.decimals,
// ).raw.toInt(),
// );
//
// Logging.instance.log("fetched fees: $feeObject", level: LogLevel.Info);
// return feeObject;
// } catch (e) {
// Logging.instance
// .log("Exception rethrown from _getFees(): $e", level: LogLevel.Error);
// rethrow;
// }
// }
//
// Future<void> _generateNewWallet(
// ({String mnemonicPassphrase, int wordCount})? data,
// ) async {
// Logging.instance
// .log("IS_INTEGRATION_TEST: $integrationTestFlag", level: LogLevel.Info);
// if (!integrationTestFlag) {
// try {
// final features = await electrumXClient
// .getServerFeatures()
// .timeout(const Duration(seconds: 3));
// Logging.instance.log("features: $features", level: LogLevel.Info);
//
// _serverVersion =
// _parseServerVersion(features["server_version"] as String);
//
// switch (coin) {
// case Coin.eCash:
// if (features['genesis_hash'] != GENESIS_HASH_MAINNET) {
// throw Exception("genesis hash does not match main net!");
// }
// break;
// // case Coin.e:
// // if (features['genesis_hash'] != GENESIS_HASH_TESTNET) {
// // throw Exception("genesis hash does not match test net!");
// // }
// // break;
// default:
// throw Exception(
// "Attempted to generate a ECashWallet using a non eCash coin type: ${coin.name}");
// }
// } catch (e, s) {
// Logging.instance.log("$e/n$s", level: LogLevel.Info);
// }
// }
//
// // this should never fail
// if ((await mnemonicString) != null || (await mnemonicPassphrase) != null) {
// throw Exception(
// "Attempted to overwrite mnemonic on generate new wallet!");
// }
// final int strength;
// if (data == null || data.wordCount == 12) {
// strength = 128;
// } else if (data.wordCount == 24) {
// strength = 256;
// } else {
// throw Exception("Invalid word count");
// }
// await _secureStore.write(
// key: '${_walletId}_mnemonic',
// value: bip39.generateMnemonic(strength: strength));
// await _secureStore.write(
// key: '${_walletId}_mnemonicPassphrase',
// value: data?.mnemonicPassphrase ?? "",
// );
//
// const int startingIndex = 0;
// const int receiveChain = 0;
// const int changeChain = 1;
//
// // Generate and add addresses to relevant arrays
// final initialAddresses = await Future.wait([
// // P2PKH
// _generateAddressForChain(
// receiveChain,
// startingIndex,
// DerivePathType.eCash44,
// ),
// _generateAddressForChain(
// changeChain,
// startingIndex,
// DerivePathType.eCash44,
// ),
// // _generateAddressForChain(
// // receiveChain,
// // startingIndex,
// // DerivePathType.bip44,
// // ),
// // _generateAddressForChain(
// // changeChain,
// // startingIndex,
// // DerivePathType.bip44,
// // ),
// ]);
//
// await db.putAddresses(initialAddresses);
//
// Logging.instance.log("_generateNewWalletFinished", level: LogLevel.Info);
// }
//
// Future<List<Map<String, dynamic>>> fastFetch(List<String> allTxHashes) async {
// List<Map<String, dynamic>> allTransactions = [];
//
// const futureLimit = 30;
// List<Future<Map<String, dynamic>>> transactionFutures = [];
// int currentFutureCount = 0;
// for (final txHash in allTxHashes) {
// Future<Map<String, dynamic>> transactionFuture =
// cachedElectrumXClient.getTransaction(
// txHash: txHash,
// verbose: true,
// coin: coin,
// );
// transactionFutures.add(transactionFuture);
// currentFutureCount++;
// if (currentFutureCount > futureLimit) {
// currentFutureCount = 0;
// await Future.wait(transactionFutures);
// for (final fTx in transactionFutures) {
// final tx = await fTx;
//
// allTransactions.add(tx);
// }
// }
// }
// if (currentFutureCount != 0) {
// currentFutureCount = 0;
// await Future.wait(transactionFutures);
// for (final fTx in transactionFutures) {
// final tx = await fTx;
//
// allTransactions.add(tx);
// }
// }
// return allTransactions;
// }
//
// double? _serverVersion;
// bool get serverCanBatch => _serverVersion != null && _serverVersion! >= 1.6;
//
// // stupid + fragile
// double? _parseServerVersion(String version) {
// double? result;
// try {
// final list = version.split(" ");
// if (list.isNotEmpty) {
// final numberStrings = list.last.split(".");
// final major = numberStrings.removeAt(0);
//
// result = double.tryParse("$major.${numberStrings.join("")}");
// }
// } catch (_) {}
//
// Logging.instance.log(
// "$walletName _parseServerVersion($version) => $result",
// level: LogLevel.Info,
// );
// return result;
// }
//
//
//
//
//
//
//
//
// /// The coinselection algorithm decides whether or not the user is eligible to make the transaction
// /// with [satoshiAmountToSend] and [selectedTxFeeRate]. If so, it will call buildTrasaction() and return
// /// a map containing the tx hex along with other important information. If not, then it will return
// /// an integer (1 or 2)
// dynamic coinSelection({
// required int satoshiAmountToSend,
// required int selectedTxFeeRate,
// required String recipientAddress,
// required bool coinControl,
// required bool isSendAll,
// int? satsPerVByte,
// int additionalOutputs = 0,
// List<isar_models.UTXO>? utxos,
// }) async {
// Logging.instance
// .log("Starting coinSelection ----------", level: LogLevel.Info);
// final List<isar_models.UTXO> availableOutputs = utxos ?? await this.utxos;
// final currentChainHeight = await chainHeight;
// final List<isar_models.UTXO> spendableOutputs = [];
// int spendableSatoshiValue = 0;
//
// // Build list of spendable outputs and totaling their satoshi amount
// for (final utxo in availableOutputs) {
// if (utxo.isBlocked == false &&
// utxo.isConfirmed(currentChainHeight, MINIMUM_CONFIRMATIONS) &&
// utxo.used != true) {
// spendableOutputs.add(utxo);
// spendableSatoshiValue += utxo.value;
// }
// }
//
// if (coinControl) {
// if (spendableOutputs.length < availableOutputs.length) {
// throw ArgumentError("Attempted to use an unavailable utxo");
// }
// }
//
// // don't care about sorting if using all utxos
// if (!coinControl) {
// // sort spendable by age (oldest first)
// spendableOutputs.sort((a, b) => b.blockTime!.compareTo(a.blockTime!));
// }
//
// Logging.instance.log("spendableOutputs.length: ${spendableOutputs.length}",
// level: LogLevel.Info);
// Logging.instance.log("availableOutputs.length: ${availableOutputs.length}",
// level: LogLevel.Info);
// Logging.instance
// .log("spendableOutputs: $spendableOutputs", level: LogLevel.Info);
// Logging.instance.log("spendableSatoshiValue: $spendableSatoshiValue",
// level: LogLevel.Info);
// Logging.instance
// .log("satoshiAmountToSend: $satoshiAmountToSend", level: LogLevel.Info);
// // If the amount the user is trying to send is smaller than the amount that they have spendable,
// // then return 1, which indicates that they have an insufficient balance.
// if (spendableSatoshiValue < satoshiAmountToSend) {
// return 1;
// // If the amount the user wants to send is exactly equal to the amount they can spend, then return
// // 2, which indicates that they are not leaving enough over to pay the transaction fee
// } else if (spendableSatoshiValue == satoshiAmountToSend && !isSendAll) {
// return 2;
// }
// // If neither of these statements pass, we assume that the user has a spendable balance greater
// // than the amount they're attempting to send. Note that this value still does not account for
// // the added transaction fee, which may require an extra input and will need to be checked for
// // later on.
//
// // Possible situation right here
// int satoshisBeingUsed = 0;
// int inputsBeingConsumed = 0;
// List<isar_models.UTXO> utxoObjectsToUse = [];
//
// if (!coinControl) {
// for (var i = 0;
// satoshisBeingUsed < satoshiAmountToSend &&
// i < spendableOutputs.length;
// i++) {
// utxoObjectsToUse.add(spendableOutputs[i]);
// satoshisBeingUsed += spendableOutputs[i].value;
// inputsBeingConsumed += 1;
// }
// for (int i = 0;
// i < additionalOutputs &&
// inputsBeingConsumed < spendableOutputs.length;
// i++) {
// utxoObjectsToUse.add(spendableOutputs[inputsBeingConsumed]);
// satoshisBeingUsed += spendableOutputs[inputsBeingConsumed].value;
// inputsBeingConsumed += 1;
// }
// } else {
// satoshisBeingUsed = spendableSatoshiValue;
// utxoObjectsToUse = spendableOutputs;
// inputsBeingConsumed = spendableOutputs.length;
// }
//
// Logging.instance
// .log("satoshisBeingUsed: $satoshisBeingUsed", level: LogLevel.Info);
// Logging.instance
// .log("inputsBeingConsumed: $inputsBeingConsumed", level: LogLevel.Info);
// Logging.instance
// .log('utxoObjectsToUse: $utxoObjectsToUse', level: LogLevel.Info);
//
// // numberOfOutputs' length must always be equal to that of recipientsArray and recipientsAmtArray
// List<String> recipientsArray = [recipientAddress];
// List<int> recipientsAmtArray = [satoshiAmountToSend];
//
// // gather required signing data
// final utxoSigningData = await fetchBuildTxData(utxoObjectsToUse);
//
// if (isSendAll) {
// Logging.instance
// .log("Attempting to send all $coin", level: LogLevel.Info);
//
// final int vSizeForOneOutput = (await buildTransaction(
// utxosToUse: utxoObjectsToUse,
// utxoSigningData: utxoSigningData,
// recipients: [recipientAddress],
// satoshiAmounts: [satoshisBeingUsed - 1],
// ))["vSize"] as int;
// int feeForOneOutput = satsPerVByte != null
// ? (satsPerVByte * vSizeForOneOutput)
// : estimateTxFee(
// vSize: vSizeForOneOutput,
// feeRatePerKB: selectedTxFeeRate,
// );
//
// if (satsPerVByte == null) {
// final int roughEstimate = roughFeeEstimate(
// spendableOutputs.length,
// 1,
// selectedTxFeeRate,
// ).raw.toInt();
// if (feeForOneOutput < roughEstimate) {
// feeForOneOutput = roughEstimate;
// }
// }
//
// final int amount = satoshiAmountToSend - feeForOneOutput;
// dynamic txn = await buildTransaction(
// utxosToUse: utxoObjectsToUse,
// utxoSigningData: utxoSigningData,
// recipients: recipientsArray,
// satoshiAmounts: [amount],
// );
// Map<String, dynamic> transactionObject = {
// "hex": txn["hex"],
// "recipient": recipientsArray[0],
// "recipientAmt": Amount(
// rawValue: BigInt.from(amount),
// fractionDigits: coin.decimals,
// ),
// "fee": feeForOneOutput,
// "vSize": txn["vSize"],
// "usedUTXOs": utxoSigningData.map((e) => e.utxo).toList(),
// };
// return transactionObject;
// }
//
// final int vSizeForOneOutput;
// try {
// vSizeForOneOutput = (await buildTransaction(
// utxosToUse: utxoObjectsToUse,
// utxoSigningData: utxoSigningData,
// recipients: [recipientAddress],
// satoshiAmounts: [satoshisBeingUsed - 1],
// ))["vSize"] as int;
// } catch (e) {
// Logging.instance.log("vSizeForOneOutput: $e", level: LogLevel.Error);
// rethrow;
// }
//
// final int vSizeForTwoOutPuts;
// try {
// vSizeForTwoOutPuts = (await buildTransaction(
// utxosToUse: utxoObjectsToUse,
// utxoSigningData: utxoSigningData,
// recipients: [
// recipientAddress,
// await _getCurrentAddressForChain(
// 1, DerivePathTypeExt.primaryFor(coin)),
// ],
// satoshiAmounts: [
// satoshiAmountToSend,
// max(0, satoshisBeingUsed - satoshiAmountToSend - 1),
// ],
// ))["vSize"] as int;
// } catch (e) {
// Logging.instance.log("vSizeForTwoOutPuts: $e", level: LogLevel.Error);
// rethrow;
// }
//
// // Assume 1 output, only for recipient and no change
// final feeForOneOutput = satsPerVByte != null
// ? (satsPerVByte * vSizeForOneOutput)
// : estimateTxFee(
// vSize: vSizeForOneOutput,
// feeRatePerKB: selectedTxFeeRate,
// );
// // Assume 2 outputs, one for recipient and one for change
// final feeForTwoOutputs = satsPerVByte != null
// ? (satsPerVByte * vSizeForTwoOutPuts)
// : estimateTxFee(
// vSize: vSizeForTwoOutPuts,
// feeRatePerKB: selectedTxFeeRate,
// );
//
// Logging.instance
// .log("feeForTwoOutputs: $feeForTwoOutputs", level: LogLevel.Info);
// Logging.instance
// .log("feeForOneOutput: $feeForOneOutput", level: LogLevel.Info);
//
// if (satoshisBeingUsed - satoshiAmountToSend > feeForOneOutput) {
// if (satoshisBeingUsed - satoshiAmountToSend >
// feeForOneOutput + DUST_LIMIT.raw.toInt()) {
// // Here, we know that theoretically, we may be able to include another output(change) but we first need to
// // factor in the value of this output in satoshis.
// int changeOutputSize =
// satoshisBeingUsed - satoshiAmountToSend - feeForTwoOutputs;
// // We check to see if the user can pay for the new transaction with 2 outputs instead of one. If they can and
// // the second output's size > DUST_LIMIT satoshis, we perform the mechanics required to properly generate and use a new
// // change address.
// if (changeOutputSize > DUST_LIMIT.raw.toInt() &&
// satoshisBeingUsed - satoshiAmountToSend - changeOutputSize ==
// feeForTwoOutputs) {
// // generate new change address if current change address has been used
// await _checkChangeAddressForTransactions();
// final String newChangeAddress = await _getCurrentAddressForChain(
// 1, DerivePathTypeExt.primaryFor(coin));
//
// int feeBeingPaid =
// satoshisBeingUsed - satoshiAmountToSend - changeOutputSize;
//
// recipientsArray.add(newChangeAddress);
// recipientsAmtArray.add(changeOutputSize);
// // At this point, we have the outputs we're going to use, the amounts to send along with which addresses
// // we intend to send these amounts to. We have enough to send instructions to build the transaction.
// Logging.instance.log('2 outputs in tx', level: LogLevel.Info);
// Logging.instance
// .log('Input size: $satoshisBeingUsed', level: LogLevel.Info);
// Logging.instance.log('Recipient output size: $satoshiAmountToSend',
// level: LogLevel.Info);
// Logging.instance.log('Change Output Size: $changeOutputSize',
// level: LogLevel.Info);
// Logging.instance.log(
// 'Difference (fee being paid): $feeBeingPaid sats',
// level: LogLevel.Info);
// Logging.instance
// .log('Estimated fee: $feeForTwoOutputs', level: LogLevel.Info);
// dynamic txn = await buildTransaction(
// 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": Amount(
// rawValue: BigInt.from(recipientsAmtArray[0]),
// fractionDigits: coin.decimals,
// ),
// "fee": feeBeingPaid,
// "vSize": txn["vSize"],
// "usedUTXOs": utxoSigningData.map((e) => e.utxo).toList(),
// };
// return transactionObject;
// } else {
// // Something went wrong here. It either overshot or undershot the estimated fee amount or the changeOutputSize
// // is smaller than or equal to DUST_LIMIT. Revert to single output transaction.
// Logging.instance.log('1 output in tx', level: LogLevel.Info);
// Logging.instance
// .log('Input size: $satoshisBeingUsed', level: LogLevel.Info);
// Logging.instance.log('Recipient output size: $satoshiAmountToSend',
// level: LogLevel.Info);
// Logging.instance.log(
// 'Difference (fee being paid): ${satoshisBeingUsed - satoshiAmountToSend} sats',
// level: LogLevel.Info);
// Logging.instance
// .log('Estimated fee: $feeForOneOutput', level: LogLevel.Info);
// dynamic txn = await buildTransaction(
// utxosToUse: utxoObjectsToUse,
// utxoSigningData: utxoSigningData,
// recipients: recipientsArray,
// satoshiAmounts: recipientsAmtArray,
// );
// Map<String, dynamic> transactionObject = {
// "hex": txn["hex"],
// "recipient": recipientsArray[0],
// "recipientAmt": Amount(
// rawValue: BigInt.from(recipientsAmtArray[0]),
// fractionDigits: coin.decimals,
// ),
// "fee": satoshisBeingUsed - satoshiAmountToSend,
// "vSize": txn["vSize"],
// "usedUTXOs": utxoSigningData.map((e) => e.utxo).toList(),
// };
// return transactionObject;
// }
// } else {
// // No additional outputs needed since adding one would mean that it'd be smaller than DUST_LIMIT sats
// // which makes it uneconomical to add to the transaction. Here, we pass data directly to instruct
// // the wallet to begin crafting the transaction that the user requested.
// Logging.instance.log('1 output in tx', level: LogLevel.Info);
// Logging.instance
// .log('Input size: $satoshisBeingUsed', level: LogLevel.Info);
// Logging.instance.log('Recipient output size: $satoshiAmountToSend',
// level: LogLevel.Info);
// Logging.instance.log(
// 'Difference (fee being paid): ${satoshisBeingUsed - satoshiAmountToSend} sats',
// level: LogLevel.Info);
// Logging.instance
// .log('Estimated fee: $feeForOneOutput', level: LogLevel.Info);
// dynamic txn = await buildTransaction(
// utxosToUse: utxoObjectsToUse,
// utxoSigningData: utxoSigningData,
// recipients: recipientsArray,
// satoshiAmounts: recipientsAmtArray,
// );
// Map<String, dynamic> transactionObject = {
// "hex": txn["hex"],
// "recipient": recipientsArray[0],
// "recipientAmt": Amount(
// rawValue: BigInt.from(recipientsAmtArray[0]),
// fractionDigits: coin.decimals,
// ),
// "fee": satoshisBeingUsed - satoshiAmountToSend,
// "vSize": txn["vSize"],
// "usedUTXOs": utxoSigningData.map((e) => e.utxo).toList(),
// };
// return transactionObject;
// }
// } else if (satoshisBeingUsed - satoshiAmountToSend == feeForOneOutput) {
// // In this scenario, no additional change output is needed since inputs - outputs equal exactly
// // what we need to pay for fees. Here, we pass data directly to instruct the wallet to begin
// // crafting the transaction that the user requested.
// Logging.instance.log('1 output in tx', level: LogLevel.Info);
// Logging.instance
// .log('Input size: $satoshisBeingUsed', level: LogLevel.Info);
// Logging.instance.log('Recipient output size: $satoshiAmountToSend',
// level: LogLevel.Info);
// Logging.instance.log(
// 'Fee being paid: ${satoshisBeingUsed - satoshiAmountToSend} sats',
// level: LogLevel.Info);
// Logging.instance
// .log('Estimated fee: $feeForOneOutput', level: LogLevel.Info);
// dynamic txn = await buildTransaction(
// utxosToUse: utxoObjectsToUse,
// utxoSigningData: utxoSigningData,
// recipients: recipientsArray,
// satoshiAmounts: recipientsAmtArray,
// );
// Map<String, dynamic> transactionObject = {
// "hex": txn["hex"],
// "recipient": recipientsArray[0],
// "recipientAmt": Amount(
// rawValue: BigInt.from(recipientsAmtArray[0]),
// fractionDigits: coin.decimals,
// ),
// "fee": feeForOneOutput,
// "vSize": txn["vSize"],
// "usedUTXOs": utxoSigningData.map((e) => e.utxo).toList(),
// };
// return transactionObject;
// } else {
// // Remember that returning 2 indicates that the user does not have a sufficient balance to
// // pay for the transaction fee. Ideally, at this stage, we should check if the user has any
// // additional outputs they're able to spend and then recalculate fees.
// Logging.instance.log(
// 'Cannot pay tx fee - checking for more outputs and trying again',
// level: LogLevel.Warning);
// // try adding more outputs
// if (spendableOutputs.length > inputsBeingConsumed) {
// return coinSelection(
// satoshiAmountToSend: satoshiAmountToSend,
// selectedTxFeeRate: selectedTxFeeRate,
// satsPerVByte: satsPerVByte,
// recipientAddress: recipientAddress,
// isSendAll: isSendAll,
// additionalOutputs: additionalOutputs + 1,
// utxos: utxos,
// coinControl: coinControl,
// );
// }
// return 2;
// }
// }
//
// Future<List<SigningData>> fetchBuildTxData(
// List<isar_models.UTXO> utxosToUse,
// ) async {
// // return data
// List<SigningData> signingData = [];
//
// try {
// // Populating the addresses to check
// for (var i = 0; i < utxosToUse.length; i++) {
// 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) {
// String address =
// output["scriptPubKey"]?["addresses"]?[0] as String? ??
// output["scriptPubKey"]["address"] as String;
// if (bitbox.Address.detectFormat(address) !=
// bitbox.Address.formatCashAddr) {
// try {
// address = bitbox.Address.toECashAddress(address);
// } catch (_) {
// rethrow;
// }
// }
//
// utxosToUse[i] = utxosToUse[i].copyWith(address: address);
// }
// }
//
// final derivePathType = addressType(address: utxosToUse[i].address!);
//
// signingData.add(
// SigningData(
// derivePathType: derivePathType,
// utxo: utxosToUse[i],
// ),
// );
// }
//
// final root = await Bip32Utils.getBip32Root(
// (await mnemonicString)!,
// (await mnemonicPassphrase)!,
// _network,
// );
//
// for (final sd in signingData) {
// final address = await db.getAddress(walletId, sd.utxo.address!);
// final node = await Bip32Utils.getBip32NodeFromRoot(
// root,
// address!.derivationPath!.value,
// );
//
// final paymentData = PaymentData(pubkey: node.publicKey);
//
// final PaymentData data;
// final Uint8List? redeemScript;
//
// switch (sd.derivePathType) {
// case DerivePathType.bip44:
// case DerivePathType.eCash44:
// data = P2PKH(
// data: paymentData,
// network: _network,
// ).data;
// redeemScript = null;
// break;
//
// default:
// throw Exception("DerivePathType unsupported");
// }
//
// final keyPair = ECPair.fromWIF(
// node.toWIF(),
// network: _network,
// );
//
// sd.redeemScript = redeemScript;
// sd.output = data.output;
// sd.keyPair = keyPair;
// }
//
// return signingData;
// } catch (e, s) {
// Logging.instance
// .log("fetchBuildTxData() threw: $e,\n$s", level: LogLevel.Error);
// rethrow;
// }
// }
//
// /// Builds and signs a transaction
// Future<Map<String, dynamic>> buildTransaction({
// required List<isar_models.UTXO> utxosToUse,
// required List<SigningData> utxoSigningData,
// required List<String> recipients,
// required List<int> satoshiAmounts,
// }) async {
// final builder = bitbox.Bitbox.transactionBuilder(
// testnet: false, //coin == Coin.bitcoincashTestnet,
// );
//
// // retrieve address' utxos from the rest api
// List<bitbox.Utxo> _utxos =
// []; // await Bitbox.Address.utxo(address) as List<Bitbox.Utxo>;
// for (var element in utxosToUse) {
// _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 List<Map<dynamic, dynamic>> signatures = [];
//
// // placeholder for total input balance
// // int totalBalance = 0;
//
// // iterate through the list of address _utxos and use them as inputs for the
// // withdrawal transaction
// for (var utxo in _utxos) {
// // add the utxo as an input for the transaction
// builder.addInput(utxo.txid, utxo.vout);
// final ec =
// utxoSigningData.firstWhere((e) => e.utxo.txid == utxo.txid).keyPair!;
//
// 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
// for (var signature in signatures) {
// 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();
//
// 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
// await _cachedElectrumXClient.clearSharedTransactionCache(coin: coin);
//
// // back up data
// // await _rescanBackup();
//
// await db.deleteWalletBlockchainData(walletId);
//
// try {
// final _mnemonic = await mnemonicString;
// final _mnemonicPassphrase = await mnemonicPassphrase;
// if (_mnemonicPassphrase == null) {
// Logging.instance.log(
// "Exception in fullRescan: mnemonic passphrase null, possible migration issue; if using internal builds, delete wallet and restore from seed, if using a release build, please file bug report",
// level: LogLevel.Error);
// }
//
// await _recoverWalletFromBIP32SeedPhrase(
// mnemonic: _mnemonic!,
// mnemonicPassphrase: _mnemonicPassphrase!,
// maxUnusedAddressGap: maxUnusedAddressGap,
// maxNumberOfIndexesToCheck: maxNumberOfIndexesToCheck,
// isRescan: true,
// );
//
// longMutex = false;
// await refresh();
// Logging.instance.log("Full rescan complete!", level: LogLevel.Info);
// GlobalEventBus.instance.fire(
// WalletSyncStatusChangedEvent(
// WalletSyncStatus.synced,
// walletId,
// coin,
// ),
// );
// } catch (e, s) {
// GlobalEventBus.instance.fire(
// WalletSyncStatusChangedEvent(
// WalletSyncStatus.unableToSync,
// walletId,
// coin,
// ),
// );
//
// // restore from backup
// // await _rescanRestore();
//
// longMutex = false;
// Logging.instance.log("Exception rethrown from fullRescan(): $e\n$s",
// level: LogLevel.Error);
// rethrow;
// }
// }
//
// Future<void> _recoverWalletFromBIP32SeedPhrase({
// required String mnemonic,
// required String mnemonicPassphrase,
// int maxUnusedAddressGap = 20,
// int maxNumberOfIndexesToCheck = 1000,
// bool isRescan = false,
// }) async {
// longMutex = true;
//
// final root = await Bip32Utils.getBip32Root(
// mnemonic,
// mnemonicPassphrase,
// _network,
// );
//
// final deriveTypes = [
// DerivePathType.eCash44,
// DerivePathType.bip44,
// ];
//
// final List<Future<Tuple2<List<isar_models.Address>, DerivePathType>>>
// receiveFutures = [];
// final List<Future<Tuple2<List<isar_models.Address>, DerivePathType>>>
// changeFutures = [];
//
// const txCountBatchSize = 12;
// const receiveChain = 0;
// const changeChain = 1;
// const indexZero = 0;
//
// try {
// // receiving addresses
// Logging.instance.log(
// "checking receiving addresses...",
// level: LogLevel.Info,
// );
//
// if (serverCanBatch) {
// for (final type in deriveTypes) {
// receiveFutures.add(
// _checkGapsBatched(
// maxNumberOfIndexesToCheck,
// maxUnusedAddressGap,
// txCountBatchSize,
// root,
// type,
// receiveChain,
// ),
// );
// }
// } else {
// for (final type in deriveTypes) {
// receiveFutures.add(
// _checkGaps(
// maxNumberOfIndexesToCheck,
// maxUnusedAddressGap,
// root,
// type,
// receiveChain,
// ),
// );
// }
// }
//
// Logging.instance.log(
// "checking change addresses...",
// level: LogLevel.Info,
// );
// // change addresses
//
// if (serverCanBatch) {
// for (final type in deriveTypes) {
// changeFutures.add(
// _checkGapsBatched(
// maxNumberOfIndexesToCheck,
// maxUnusedAddressGap,
// txCountBatchSize,
// root,
// type,
// changeChain,
// ),
// );
// }
// } else {
// for (final type in deriveTypes) {
// changeFutures.add(
// _checkGaps(
// maxNumberOfIndexesToCheck,
// maxUnusedAddressGap,
// root,
// type,
// changeChain,
// ),
// );
// }
// }
//
// // io limitations may require running these linearly instead
// final futuresResult = await Future.wait([
// Future.wait(receiveFutures),
// Future.wait(changeFutures),
// ]);
//
// final receiveResults = futuresResult[0];
// final changeResults = futuresResult[1];
//
// final List<isar_models.Address> addressesToStore = [];
//
// // 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
// for (final tuple in receiveResults) {
// if (tuple.item1.isEmpty) {
// final address = await _generateAddressForChain(
// receiveChain,
// indexZero,
// tuple.item2,
// );
// addressesToStore.add(address);
// } else {
// addressesToStore.addAll(tuple.item1);
// }
// }
//
// // 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.
// for (final tuple in changeResults) {
// if (tuple.item1.isEmpty) {
// final address = await _generateAddressForChain(
// changeChain,
// indexZero,
// tuple.item2,
// );
// addressesToStore.add(address);
// } else {
// addressesToStore.addAll(tuple.item1);
// }
// }
//
// if (isRescan) {
// await db.updateOrPutAddresses(addressesToStore);
// } else {
// await db.putAddresses(addressesToStore);
// }
//
// await _updateUTXOs();
//
// await Future.wait([
// updateCachedId(walletId),
// updateCachedIsFavorite(false),
// ]);
//
// longMutex = false;
// } catch (e, s) {
// Logging.instance.log(
// "Exception rethrown from _recoverWalletFromBIP32SeedPhrase(): $e\n$s",
// level: LogLevel.Info);
//
// longMutex = false;
// rethrow;
// }
// }
//
// Future<Tuple2<List<isar_models.Address>, DerivePathType>> _checkGaps(
// int maxNumberOfIndexesToCheck,
// int maxUnusedAddressGap,
// bip32.BIP32 root,
// DerivePathType type,
// int chain,
// ) async {
// List<isar_models.Address> addressArray = [];
// int gapCounter = 0;
// for (int index = 0;
// index < maxNumberOfIndexesToCheck && gapCounter < maxUnusedAddressGap;
// index++) {
// Logging.instance.log(
// "index: $index, \t GapCounter chain=$chain ${type.name}: $gapCounter",
// level: LogLevel.Info);
//
// final derivePath = constructDerivePath(
// derivePathType: type,
// networkWIF: root.network.wif,
// chain: chain,
// index: index,
// );
// final node = await Bip32Utils.getBip32NodeFromRoot(root, derivePath);
//
// String addressString;
// final data = PaymentData(pubkey: node.publicKey);
// isar_models.AddressType addressType;
// switch (type) {
// case DerivePathType.bip44:
// case DerivePathType.eCash44:
// addressString = P2PKH(data: data, network: _network).data.address!;
// addressType = isar_models.AddressType.p2pkh;
// addressString = bitbox.Address.toECashAddress(addressString);
// break;
// default:
// throw Exception("DerivePathType $type not supported");
// }
//
// final address = isar_models.Address(
// walletId: walletId,
// value: addressString,
// publicKey: node.publicKey,
// type: addressType,
// derivationIndex: index,
// derivationPath: isar_models.DerivationPath()..value = derivePath,
// subType: chain == 0
// ? isar_models.AddressSubType.receiving
// : isar_models.AddressSubType.change,
// );
//
// // get address tx count
// final count = await _getTxCount(address: address);
//
// // check and add appropriate addresses
// if (count > 0) {
// // add address to array
// addressArray.add(address);
// // reset counter
// gapCounter = 0;
// // add info to derivations
// } else {
// // increase counter when no tx history found
// gapCounter++;
// }
// }
//
// return Tuple2(addressArray, type);
// }
//
// Future<Tuple2<List<isar_models.Address>, DerivePathType>> _checkGapsBatched(
// int maxNumberOfIndexesToCheck,
// int maxUnusedAddressGap,
// int txCountBatchSize,
// bip32.BIP32 root,
// DerivePathType type,
// int chain,
// ) async {
// List<isar_models.Address> addressArray = [];
// int gapCounter = 0;
// for (int index = 0;
// index < maxNumberOfIndexesToCheck && gapCounter < maxUnusedAddressGap;
// index += txCountBatchSize) {
// List<String> iterationsAddressArray = [];
// Logging.instance.log(
// "index: $index, \t GapCounter $chain ${type.name}: $gapCounter",
// level: LogLevel.Info);
//
// final _id = "k_$index";
// Map<String, String> txCountCallArgs = {};
// final Map<String, dynamic> receivingNodes = {};
//
// for (int j = 0; j < txCountBatchSize; j++) {
// final derivePath = constructDerivePath(
// derivePathType: type,
// networkWIF: root.network.wif,
// chain: chain,
// index: index + j,
// );
// final node = await Bip32Utils.getBip32NodeFromRoot(root, derivePath);
//
// String addressString;
// final data = PaymentData(pubkey: node.publicKey);
// isar_models.AddressType addrType;
// switch (type) {
// case DerivePathType.bip44:
// case DerivePathType.eCash44:
// addressString = P2PKH(data: data, network: _network).data.address!;
// addrType = isar_models.AddressType.p2pkh;
// addressString = bitbox.Address.toECashAddress(addressString);
// break;
// default:
// throw Exception("DerivePathType $type not supported");
// }
//
// final address = isar_models.Address(
// walletId: walletId,
// value: addressString,
// publicKey: node.publicKey,
// type: addrType,
// derivationIndex: index + j,
// derivationPath: isar_models.DerivationPath()..value = derivePath,
// subType: chain == 0
// ? isar_models.AddressSubType.receiving
// : isar_models.AddressSubType.change,
// );
//
// receivingNodes.addAll({
// "${_id}_$j": {
// "node": node,
// "address": address,
// }
// });
// txCountCallArgs.addAll({
// "${_id}_$j": addressString,
// });
// }
//
// // get address tx counts
// final counts = await _getBatchTxCount(addresses: txCountCallArgs);
//
// // check and add appropriate addresses
// for (int k = 0; k < txCountBatchSize; k++) {
// int count = counts["${_id}_$k"]!;
// if (count > 0) {
// final node = receivingNodes["${_id}_$k"];
// final address = node["address"] as isar_models.Address;
// // add address to array
// addressArray.add(address);
// iterationsAddressArray.add(address.value);
// // set current index
// // reset counter
// gapCounter = 0;
// // add info to derivations
// }
//
// // increase counter when no tx history found
// if (count == 0) {
// gapCounter++;
// }
// }
// // cache all the transactions while waiting for the current function to finish.
// unawaited(getTransactionCacheEarly(iterationsAddressArray));
// }
//
// return Tuple2(addressArray, type);
// }
//
// Future<void> getTransactionCacheEarly(List<String> allAddresses) async {
// try {
// final List<Map<String, dynamic>> allTxHashes =
// await _fetchHistory(allAddresses);
// for (final txHash in allTxHashes) {
// try {
// unawaited(cachedElectrumXClient.getTransaction(
// txHash: txHash["tx_hash"] as String,
// verbose: true,
// coin: coin,
// ));
// } catch (e) {
// continue;
// }
// }
// } catch (e) {
// //
// }
// }
//
// 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();
// }
// }
// }
//
// bool isActive = false;
//
// @override
// void Function(bool)? get onIsActiveWalletChanged =>
// (isActive) => this.isActive = isActive;
//
// @override
// Future<Amount> estimateFeeFor(Amount amount, int feeRate) async {
// final available = balance.spendable;
//
// if (available == amount) {
// return amount - (await sweepAllEstimate(feeRate));
// } else if (amount <= Amount.zero || amount > available) {
// return roughFeeEstimate(1, 2, feeRate);
// }
//
// Amount runningBalance = Amount(
// rawValue: BigInt.zero,
// fractionDigits: coin.decimals,
// );
// int inputCount = 0;
// for (final output in (await utxos)) {
// if (!output.isBlocked) {
// runningBalance += Amount(
// rawValue: BigInt.from(output.value),
// fractionDigits: coin.decimals,
// );
// inputCount++;
// if (runningBalance > amount) {
// break;
// }
// }
// }
//
// final oneOutPutFee = roughFeeEstimate(inputCount, 1, feeRate);
// final twoOutPutFee = roughFeeEstimate(inputCount, 2, feeRate);
//
// if (runningBalance - amount > oneOutPutFee) {
// if (runningBalance - amount > oneOutPutFee + DUST_LIMIT) {
// final change = runningBalance - amount - twoOutPutFee;
// if (change > DUST_LIMIT &&
// runningBalance - amount - change == twoOutPutFee) {
// return runningBalance - amount - change;
// } else {
// return runningBalance - amount;
// }
// } else {
// return runningBalance - amount;
// }
// } else if (runningBalance - amount == oneOutPutFee) {
// return oneOutPutFee;
// } else {
// return twoOutPutFee;
// }
// }
//
//
// @override
// Future<Map<String, dynamic>> prepareSend({
// required String address,
// required Amount amount,
// Map<String, dynamic>? args,
// }) async {
// try {
// final feeRateType = args?["feeRate"];
// final customSatsPerVByte = args?["satsPerVByte"] as int?;
// final feeRateAmount = args?["feeRateAmount"];
// final utxos = args?["UTXOs"] as Set<isar_models.UTXO>?;
//
// if (customSatsPerVByte != null) {
// // check for send all
// bool isSendAll = false;
// if (amount == balance.spendable) {
// isSendAll = true;
// }
//
// final bool coinControl = utxos != null;
//
// final result = await coinSelection(
// satoshiAmountToSend: amount.raw.toInt(),
// selectedTxFeeRate: -1,
// satsPerVByte: customSatsPerVByte,
// recipientAddress: address,
// isSendAll: isSendAll,
// utxos: utxos?.toList(),
// coinControl: coinControl,
// );
//
// Logging.instance
// .log("PREPARE SEND RESULT: $result", level: LogLevel.Info);
// if (result is int) {
// switch (result) {
// case 1:
// throw Exception("Insufficient balance!");
// case 2:
// throw Exception("Insufficient funds to pay for transaction fee!");
// default:
// throw Exception("Transaction failed with error code $result");
// }
// } else {
// final hex = result["hex"];
// if (hex is String) {
// final fee = result["fee"] as int;
// final vSize = result["vSize"] as int;
//
// Logging.instance.log("txHex: $hex", level: LogLevel.Info);
// Logging.instance.log("fee: $fee", level: LogLevel.Info);
// Logging.instance.log("vsize: $vSize", level: LogLevel.Info);
// // fee should never be less than vSize sanity check
// if (fee < vSize) {
// throw Exception(
// "Error in fee calculation: Transaction fee cannot be less than vSize");
// }
// return result as Map<String, dynamic>;
// } else {
// throw Exception("sent hex is not a String!!!");
// }
// }
// } else if (feeRateType is FeeRateType || feeRateAmount is int) {
// late final int rate;
// if (feeRateType is FeeRateType) {
// int fee = 0;
// final feeObject = await fees;
// switch (feeRateType) {
// case FeeRateType.fast:
// fee = feeObject.fast;
// break;
// case FeeRateType.average:
// fee = feeObject.medium;
// break;
// case FeeRateType.slow:
// fee = feeObject.slow;
// break;
//
// default:
// throw ArgumentError("Invalid use of custom fee");
// }
// rate = fee;
// } else {
// rate = feeRateAmount as int;
// }
//
// // check for send all
// bool isSendAll = false;
// if (amount == balance.spendable) {
// isSendAll = true;
// }
//
// final bool coinControl = utxos != null;
//
// final txData = await coinSelection(
// satoshiAmountToSend: amount.raw.toInt(),
// selectedTxFeeRate: rate,
// recipientAddress: address,
// isSendAll: isSendAll,
// utxos: utxos?.toList(),
// coinControl: coinControl,
// );
//
// Logging.instance.log("prepare send: $txData", level: LogLevel.Info);
// try {
// if (txData is int) {
// switch (txData) {
// case 1:
// throw Exception("Insufficient balance!");
// case 2:
// throw Exception(
// "Insufficient funds to pay for transaction fee!");
// default:
// throw Exception("Transaction failed with error code $txData");
// }
// } else {
// final hex = txData["hex"];
//
// if (hex is String) {
// final fee = txData["fee"] as int;
// final vSize = txData["vSize"] as int;
//
// Logging.instance
// .log("prepared txHex: $hex", level: LogLevel.Info);
// Logging.instance.log("prepared fee: $fee", level: LogLevel.Info);
// Logging.instance
// .log("prepared vSize: $vSize", level: LogLevel.Info);
//
// // fee should never be less than vSize sanity check
// if (fee < vSize) {
// throw Exception(
// "Error in fee calculation: Transaction fee cannot be less than vSize");
// }
//
// return txData as Map<String, dynamic>;
// } else {
// throw Exception("prepared hex is not a String!!!");
// }
// }
// } catch (e, s) {
// Logging.instance.log("Exception rethrown from prepareSend(): $e\n$s",
// level: LogLevel.Error);
// rethrow;
// }
// } else {
// throw ArgumentError("Invalid fee rate argument provided!");
// }
// } catch (e, s) {
// Logging.instance.log("Exception rethrown from prepareSend(): $e\n$s",
// level: LogLevel.Error);
// rethrow;
// }
// }
//
// @override
// Future<String> confirmSend({required Map<String, dynamic> txData}) async {
// try {
// Logging.instance.log("confirmSend txData: $txData", level: LogLevel.Info);
//
// final hex = txData["hex"] as String;
//
// final txHash = await _electrumXClient.broadcastTransaction(rawTx: hex);
// Logging.instance.log("Sent txHash: $txHash", level: LogLevel.Info);
//
// final utxos = txData["usedUTXOs"] as List<isar_models.UTXO>;
//
// // mark utxos as used
// await db.putUTXOs(utxos.map((e) => e.copyWith(used: true)).toList());
//
// return txHash;
// } catch (e, s) {
// Logging.instance.log("Exception rethrown from confirmSend(): $e\n$s",
// level: LogLevel.Error);
// rethrow;
// }
// }
//
// @override
// Future<bool> testNetworkConnection() async {
// try {
// final result = await _electrumXClient.ping();
// return result;
// } catch (_) {
// return false;
// }
// }
//
// Timer? _networkAliveTimer;
//
// void startNetworkAlivePinging() {
// // call once on start right away
// _periodicPingCheck();
//
// // then periodically check
// _networkAliveTimer = Timer.periodic(
// Constants.networkAliveTimerDuration,
// (_) async {
// _periodicPingCheck();
// },
// );
// }
//
// void _periodicPingCheck() async {
// bool hasNetwork = await testNetworkConnection();
//
// if (_isConnected != hasNetwork) {
// NodeConnectionStatus status = hasNetwork
// ? NodeConnectionStatus.connected
// : NodeConnectionStatus.disconnected;
// GlobalEventBus.instance
// .fire(NodeConnectionStatusChangedEvent(status, walletId, coin));
//
// _isConnected = hasNetwork;
// if (hasNetwork) {
// unawaited(refresh());
// }
// }
// }
//
// void stopNetworkAlivePinging() {
// _networkAliveTimer?.cancel();
// _networkAliveTimer = null;
// }
//
// bool _isConnected = false;
//
// @override
// bool get isConnected => _isConnected;
//
// @override
// Future<void> initializeNew(
// ({String mnemonicPassphrase, int wordCount})? data,
// ) async {
// Logging.instance
// .log("Generating new ${coin.prettyName} wallet.", level: LogLevel.Info);
//
// if (getCachedId() != null) {
// throw Exception(
// "Attempted to initialize a new wallet using an existing wallet ID!");
// }
//
// await _prefs.init();
// try {
// await _generateNewWallet(data);
// } catch (e, s) {
// Logging.instance.log("Exception rethrown from initializeNew(): $e\n$s",
// level: LogLevel.Fatal);
// rethrow;
// }
// await Future.wait([
// updateCachedId(walletId),
// updateCachedIsFavorite(false),
// ]);
// }
//
// @override
// Future<void> initializeExisting() async {
// Logging.instance.log("initializeExisting() ${coin.prettyName} wallet.",
// level: LogLevel.Info);
//
// try {
// final features = await electrumXClient.getServerFeatures();
// _serverVersion =
// _parseServerVersion(features["server_version"] as String);
// } catch (_) {
// // catch nothing as failure here means we just do not batch certain rpc
// // calls
// }
//
// if (getCachedId() == null) {
// throw Exception(
// "Attempted to initialize an existing wallet using an unknown wallet ID!");
// }
//
// await _prefs.init();
// // await _checkCurrentChangeAddressesForTransactions();
// // await _checkCurrentReceivingAddressesForTransactions();
// }
//
// // hack to add tx to txData before refresh completes
// // required based on current app architecture where we don't properly store
// // transactions locally in a good way
// @override
// Future<void> updateSentCachedTxData(Map<String, dynamic> txData) async {
// final transaction = isar_models.Transaction(
// walletId: walletId,
// txid: txData["txid"] as String,
// timestamp: DateTime.now().millisecondsSinceEpoch ~/ 1000,
// type: isar_models.TransactionType.outgoing,
// subType: isar_models.TransactionSubType.none,
// // precision may be lost here hence the following amountString
// amount: (txData["recipientAmt"] as Amount).raw.toInt(),
// amountString: (txData["recipientAmt"] as Amount).toJsonString(),
// fee: txData["fee"] as int,
// height: null,
// isCancelled: false,
// isLelantus: false,
// otherData: null,
// slateId: null,
// nonce: null,
// inputs: [],
// outputs: [],
// numberOfMessages: null,
// );
//
// final address = txData["address"] is String
// ? await db.getAddress(walletId, txData["address"] as String)
// : null;
//
// await db.addNewTransactionData(
// [
// Tuple2(transaction, address),
// ],
// walletId,
// );
// }
//
// @override
// bool get isRefreshing => refreshMutex;
//
// bool refreshMutex = false;
//
// //TODO Show percentages properly/more consistently
// /// Refreshes display data for the wallet
// @override
// Future<void> refresh() async {
// if (refreshMutex) {
// Logging.instance.log("$walletId $walletName refreshMutex denied",
// level: LogLevel.Info);
// return;
// } else {
// refreshMutex = true;
// }
//
// try {
// GlobalEventBus.instance.fire(
// WalletSyncStatusChangedEvent(
// WalletSyncStatus.syncing,
// walletId,
// coin,
// ),
// );
//
// GlobalEventBus.instance.fire(RefreshPercentChangedEvent(0.0, walletId));
//
// GlobalEventBus.instance.fire(RefreshPercentChangedEvent(0.1, walletId));
//
// final currentHeight = await chainHeight;
// const storedHeight = 1; //await storedChainHeight;
//
// Logging.instance
// .log("chain height: $currentHeight", level: LogLevel.Info);
// // Logging.instance
// // .log("cached height: $storedHeight", level: LogLevel.Info);
//
// if (currentHeight != storedHeight) {
// GlobalEventBus.instance.fire(RefreshPercentChangedEvent(0.2, walletId));
// await _checkCurrentChangeAddressesForTransactions();
//
// GlobalEventBus.instance.fire(RefreshPercentChangedEvent(0.3, walletId));
// await _checkCurrentReceivingAddressesForTransactions();
//
// GlobalEventBus.instance.fire(RefreshPercentChangedEvent(0.4, walletId));
//
// final fetchFuture = _refreshTransactions();
// GlobalEventBus.instance
// .fire(RefreshPercentChangedEvent(0.50, walletId));
//
// final feeObj = _getFees();
// GlobalEventBus.instance
// .fire(RefreshPercentChangedEvent(0.60, walletId));
//
// GlobalEventBus.instance
// .fire(RefreshPercentChangedEvent(0.70, walletId));
// _feeObject = Future(() => feeObj);
//
// await fetchFuture;
// GlobalEventBus.instance
// .fire(RefreshPercentChangedEvent(0.80, walletId));
//
// await _updateUTXOs();
// await getAllTxsToWatch();
// GlobalEventBus.instance
// .fire(RefreshPercentChangedEvent(0.90, walletId));
// }
//
// refreshMutex = false;
// GlobalEventBus.instance.fire(RefreshPercentChangedEvent(1.0, walletId));
// GlobalEventBus.instance.fire(
// WalletSyncStatusChangedEvent(
// WalletSyncStatus.synced,
// walletId,
// coin,
// ),
// );
//
// if (shouldAutoSync) {
// timer ??= Timer.periodic(const Duration(seconds: 30), (timer) async {
// Logging.instance.log(
// "Periodic refresh check for $walletId $walletName in object instance: $hashCode",
// level: LogLevel.Info);
// // chain height check currently broken
// // if ((await chainHeight) != (await storedChainHeight)) {
// if (await refreshIfThereIsNewData()) {
// await refresh();
// GlobalEventBus.instance.fire(UpdatedInBackgroundEvent(
// "New data found in $walletId $walletName in background!",
// walletId));
// }
// // }
// });
// }
// } catch (error, strace) {
// refreshMutex = false;
// GlobalEventBus.instance.fire(
// NodeConnectionStatusChangedEvent(
// NodeConnectionStatus.disconnected,
// walletId,
// coin,
// ),
// );
// GlobalEventBus.instance.fire(
// WalletSyncStatusChangedEvent(
// WalletSyncStatus.unableToSync,
// walletId,
// coin,
// ),
// );
// Logging.instance.log(
// "Caught exception in refreshWalletData(): $error\n$strace",
// level: LogLevel.Error);
// }
// }
//
// Future<bool> refreshIfThereIsNewData() async {
// if (longMutex) return false;
// if (_hasCalledExit) return false;
// Logging.instance.log("refreshIfThereIsNewData", level: LogLevel.Info);
//
// try {
// bool needsRefresh = false;
// Set<String> txnsToCheck = {};
//
// for (final String txid in txTracker.pendings) {
// if (!txTracker.wasNotifiedConfirmed(txid)) {
// txnsToCheck.add(txid);
// }
// }
//
// for (String txid in txnsToCheck) {
// final txn = await electrumXClient.getTransaction(txHash: txid);
// int confirmations = txn["confirmations"] as int? ?? 0;
// bool isUnconfirmed = confirmations < MINIMUM_CONFIRMATIONS;
// if (!isUnconfirmed) {
// // unconfirmedTxs = {};
// needsRefresh = true;
// break;
// }
// }
// if (!needsRefresh) {
// final allOwnAddresses = await _fetchAllOwnAddresses();
// List<Map<String, dynamic>> allTxs = await _fetchHistory(
// allOwnAddresses.map((e) => e.value).toList(growable: false));
// for (Map<String, dynamic> transaction in allTxs) {
// final txid = transaction['tx_hash'] as String;
// if ((await db
// .getTransactions(walletId)
// .filter()
// .txidMatches(txid)
// .findFirst()) ==
// null) {
// Logging.instance.log(
// " txid not found in address history already ${transaction['tx_hash']}",
// level: LogLevel.Info);
// needsRefresh = true;
// break;
// }
// }
// }
// return needsRefresh;
// } on NoSuchTransactionException catch (e) {
// // TODO: move direct transactions elsewhere
// await db.isar.writeTxn(() async {
// await db.isar.transactions.deleteByTxidWalletId(e.txid, walletId);
// });
// await txTracker.deleteTransaction(e.txid);
// return true;
// } catch (e, s) {
// Logging.instance.log(
// "Exception caught in refreshIfThereIsNewData: $e\n$s",
// level: LogLevel.Error);
// rethrow;
// }
// }
//
// Future<void> getAllTxsToWatch() async {
// if (_hasCalledExit) return;
// List<isar_models.Transaction> unconfirmedTxnsToNotifyPending = [];
// List<isar_models.Transaction> unconfirmedTxnsToNotifyConfirmed = [];
//
// final currentChainHeight = await chainHeight;
//
// final txCount = await db.getTransactions(walletId).count();
//
// const paginateLimit = 50;
//
// for (int i = 0; i < txCount; i += paginateLimit) {
// final transactions = await db
// .getTransactions(walletId)
// .offset(i)
// .limit(paginateLimit)
// .findAll();
// for (final tx in transactions) {
// if (tx.isConfirmed(currentChainHeight, MINIMUM_CONFIRMATIONS)) {
// // get all transactions that were notified as pending but not as confirmed
// if (txTracker.wasNotifiedPending(tx.txid) &&
// !txTracker.wasNotifiedConfirmed(tx.txid)) {
// unconfirmedTxnsToNotifyConfirmed.add(tx);
// }
// } else {
// // get all transactions that were not notified as pending yet
// if (!txTracker.wasNotifiedPending(tx.txid)) {
// unconfirmedTxnsToNotifyPending.add(tx);
// }
// }
// }
// }
//
// // notify on unconfirmed transactions
// for (final tx in unconfirmedTxnsToNotifyPending) {
// final confirmations = tx.getConfirmations(currentChainHeight);
//
// if (tx.type == isar_models.TransactionType.incoming) {
// CryptoNotificationsEventBus.instance.fire(
// CryptoNotificationEvent(
// title: "Incoming transaction",
// walletId: walletId,
// walletName: walletName,
// date: DateTime.fromMillisecondsSinceEpoch(tx.timestamp * 1000),
// shouldWatchForUpdates: confirmations < MINIMUM_CONFIRMATIONS,
// coin: coin,
// txid: tx.txid,
// confirmations: confirmations,
// requiredConfirmations: MINIMUM_CONFIRMATIONS,
// ),
// );
// await txTracker.addNotifiedPending(tx.txid);
// } else if (tx.type == isar_models.TransactionType.outgoing) {
// CryptoNotificationsEventBus.instance.fire(
// CryptoNotificationEvent(
// title: "Sending transaction",
// walletId: walletId,
// date: DateTime.fromMillisecondsSinceEpoch(tx.timestamp * 1000),
// shouldWatchForUpdates: confirmations < MINIMUM_CONFIRMATIONS,
// txid: tx.txid,
// confirmations: confirmations,
// requiredConfirmations: MINIMUM_CONFIRMATIONS,
// walletName: walletName,
// coin: coin,
// ),
// );
// await txTracker.addNotifiedPending(tx.txid);
// }
// }
//
// // notify on confirmed
// for (final tx in unconfirmedTxnsToNotifyConfirmed) {
// if (tx.type == isar_models.TransactionType.incoming) {
// CryptoNotificationsEventBus.instance.fire(
// CryptoNotificationEvent(
// title: "Incoming transaction confirmed",
// walletId: walletId,
// date: DateTime.fromMillisecondsSinceEpoch(tx.timestamp * 1000),
// shouldWatchForUpdates: false,
// txid: tx.txid,
// requiredConfirmations: MINIMUM_CONFIRMATIONS,
// walletName: walletName,
// coin: coin,
// ),
// );
// await txTracker.addNotifiedConfirmed(tx.txid);
// } else if (tx.type == isar_models.TransactionType.outgoing) {
// CryptoNotificationsEventBus.instance.fire(
// CryptoNotificationEvent(
// title: "Outgoing transaction confirmed",
// walletId: walletId,
// date: DateTime.fromMillisecondsSinceEpoch(tx.timestamp * 1000),
// shouldWatchForUpdates: false,
// txid: tx.txid,
// requiredConfirmations: MINIMUM_CONFIRMATIONS,
// walletName: walletName,
// coin: coin,
// ),
// );
// await txTracker.addNotifiedConfirmed(tx.txid);
// }
// }
// }
//
// @override
// Future<void> recoverFromMnemonic({
// required String mnemonic,
// String? mnemonicPassphrase,
// required int maxUnusedAddressGap,
// required int maxNumberOfIndexesToCheck,
// required int height,
// }) async {
// longMutex = true;
// final start = DateTime.now();
// try {
// Logging.instance.log("IS_INTEGRATION_TEST: $integrationTestFlag",
// level: LogLevel.Info);
// if (!integrationTestFlag) {
// final features = await electrumXClient.getServerFeatures();
// Logging.instance.log("features: $features", level: LogLevel.Info);
// _serverVersion =
// _parseServerVersion(features["server_version"] as String);
// switch (coin) {
// case Coin.eCash:
// if (features['genesis_hash'] != GENESIS_HASH_MAINNET) {
// throw Exception("genesis hash does not match main net!");
// }
// break;
// // case Coin.bitcoinTestNet:
// // if (features['genesis_hash'] != GENESIS_HASH_TESTNET) {
// // throw Exception("genesis hash does not match test net!");
// // }
// // break;
// default:
// throw Exception(
// "Attempted to generate a ECashWallet using a non eCash coin type: ${coin.name}");
// }
// }
// // check to make sure we aren't overwriting a mnemonic
// // this should never fail
// if ((await mnemonicString) != null ||
// (await this.mnemonicPassphrase) != null) {
// longMutex = false;
// throw Exception("Attempted to overwrite mnemonic on restore!");
// }
// await _secureStore.write(
// key: '${_walletId}_mnemonic', value: mnemonic.trim());
// await _secureStore.write(
// key: '${_walletId}_mnemonicPassphrase',
// value: mnemonicPassphrase ?? "",
// );
//
// await _recoverWalletFromBIP32SeedPhrase(
// mnemonic: mnemonic.trim(),
// mnemonicPassphrase: mnemonicPassphrase ?? "",
// maxUnusedAddressGap: maxUnusedAddressGap,
// maxNumberOfIndexesToCheck: maxNumberOfIndexesToCheck,
// );
// } catch (e, s) {
// Logging.instance.log(
// "Exception rethrown from recoverFromMnemonic(): $e\n$s",
// level: LogLevel.Error);
// longMutex = false;
// rethrow;
// }
// longMutex = false;
//
// final end = DateTime.now();
// Logging.instance.log(
// "$walletName recovery time: ${end.difference(start).inMilliseconds} millis",
// level: LogLevel.Info);
// }
// }
