// 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 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 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 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 outputsList = []; // // @override // Coin get coin => _coin; // // @override // Future> get allOwnAddresses => // _allOwnAddresses ??= _fetchAllOwnAddresses(); // Future>? _allOwnAddresses; // // Future? _utxoData; // Future get utxoData => _utxoData ??= _fetchUtxoData(); // // @override // Future> get unspentOutputs async => // (await utxoData).unspentOutputArray; // // @override // Future get availableBalance async { // final data = await utxoData; // return Format.satoshisToAmount( // data.satoshiBalance - data.satoshiBalanceUnconfirmed); // } // // @override // Future get pendingBalance async { // final data = await utxoData; // return Format.satoshisToAmount(data.satoshiBalanceUnconfirmed); // } // // @override // Future get balanceMinusMaxFee async => // (await availableBalance) - // (Decimal.fromInt((await maxFee)) / Decimal.fromInt(Constants.satsPerCoin)) // .toDecimal(); // // @override // Future get totalBalance async { // if (!isActive) { // final totalBalance = DB.instance // .get(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 get currentReceivingAddress => // _currentReceivingAddressP2PKH ??= // _getCurrentAddressForChain(0, DerivePathType.bip44); // // Future? _currentReceivingAddressP2PKH; // // @override // Future exit() async { // _hasCalledExit = true; // timer?.cancel(); // timer = null; // stopNetworkAlivePinging(); // } // // bool _hasCalledExit = false; // // @override // bool get hasCalledExit => _hasCalledExit; // // @override // Future get fees => _feeObject ??= _getFees(); // Future? _feeObject; // // @override // Future get maxFee async { // final fee = (await fees).fast; // final satsFee = // Format.satoshisToAmount(fee) * Decimal.fromInt(Constants.satsPerCoin); // return satsFee.floor().toBigInt().toInt(); // } // // @override // Future> get mnemonic => _getMnemonicList(); // // Future 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 get storedChainHeight async { // final storedHeight = DB.instance // .get(boxName: walletId, key: "storedChainHeight") as int?; // return storedHeight ?? 0; // } // // Future updateStoredChainHeight({required int newHeight}) async { // DB.instance.put( // 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 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 _recoverWalletFromBIP32SeedPhrase({ // required String mnemonic, // int maxUnusedAddressGap = 20, // int maxNumberOfIndexesToCheck = 1000, // }) async { // longMutex = true; // // Map> p2pkhReceiveDerivations = {}; // Map> p2pkhChangeDerivations = {}; // // final root = await compute(getBip32RootWrapper, Tuple2(mnemonic, _network)); // // List p2pkhReceiveAddressArray = []; // int p2pkhReceiveIndex = -1; // // List 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 txCountCallArgs = {}; // final Map 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 args = {}; // final Map 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( // boxName: walletId, // key: 'receivingAddressesP2PKH', // value: p2pkhReceiveAddressArray); // await DB.instance.put( // boxName: walletId, // key: 'changeAddressesP2PKH', // value: p2pkhChangeAddressArray); // await DB.instance.put( // boxName: walletId, // key: 'receivingIndexP2PKH', // value: p2pkhReceiveIndex); // await DB.instance.put( // boxName: walletId, key: 'changeIndexP2PKH', value: p2pkhChangeIndex); // await DB.instance // .put(boxName: walletId, key: "id", value: _walletId); // await DB.instance // .put(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 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 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> allTxs = // await _fetchHistory(allOwnAddresses); // final txData = await transactionData; // for (Map 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 getAllTxsToWatch( // TransactionData txData, // ) async { // if (_hasCalledExit) return; // List unconfirmedTxnsToNotifyPending = []; // List 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 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> prepareSend({ // required String address, // required int satoshiAmount, // Map? 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; // } 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 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 send({ // required String toAddress, // required int amount, // Map 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 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 initializeNew() async { // Logging.instance // .log("Generating new ${coin.prettyName} wallet.", level: LogLevel.Info); // // if ((DB.instance.get(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(boxName: walletId, key: "id", value: _walletId), // DB.instance // .put(boxName: walletId, key: "isFavorite", value: false), // ]); // } // // @override // Future initializeExisting() async { // Logging.instance.log("Opening existing ${coin.prettyName} wallet.", // level: LogLevel.Info); // // if ((DB.instance.get(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(boxName: walletId, key: "latest_tx_model") // as TransactionData?; // if (data != null) { // _transactionData = Future(() => data); // } // } // // @override // Future get transactionData => // _transactionData ??= _fetchTransactionData(); // Future? _transactionData; // // @override // bool validateAddress(String address) { // try { // // 0 for bitcoincash: address scheme, 1 for legacy address // final format = Bitbox.Address.detectFormat(address); // print("format $format"); // return true; // } catch (e, s) { // return false; // } // } // // @override // String get walletId => _walletId; // late String _walletId; // // @override // String get walletName => _walletName; // late String _walletName; // // // setter for updating on rename // @override // set walletName(String newName) => _walletName = newName; // // late ElectrumX _electrumXClient; // // ElectrumX get electrumXClient => _electrumXClient; // // late CachedElectrumX _cachedElectrumXClient; // // CachedElectrumX get cachedElectrumXClient => _cachedElectrumXClient; // // late FlutterSecureStorageInterface _secureStore; // // late PriceAPI _priceAPI; // // BitcoinCashWallet({ // required String walletId, // required String walletName, // required Coin coin, // required ElectrumX client, // required CachedElectrumX cachedClient, // required TransactionNotificationTracker tracker, // PriceAPI? priceAPI, // FlutterSecureStorageInterface? secureStore, // }) { // txTracker = tracker; // _walletId = walletId; // _walletName = walletName; // _coin = coin; // _electrumXClient = client; // _cachedElectrumXClient = cachedClient; // // _priceAPI = priceAPI ?? PriceAPI(Client()); // _secureStore = // secureStore ?? const SecureStorageWrapper(FlutterSecureStorage()); // } // // @override // Future updateNode(bool shouldRefresh) async { // final failovers = NodeService() // .failoverNodesFor(coin: coin) // .map((e) => ElectrumXNode( // address: e.host, // port: e.port, // name: e.name, // id: e.id, // useSSL: e.useSSL, // )) // .toList(); // final newNode = await getCurrentNode(); // _cachedElectrumXClient = CachedElectrumX.from( // node: newNode, // prefs: _prefs, // failovers: failovers, // ); // _electrumXClient = ElectrumX.from( // node: newNode, // prefs: _prefs, // failovers: failovers, // ); // // if (shouldRefresh) { // refresh(); // } // } // // Future> _getMnemonicList() async { // final mnemonicString = // await _secureStore.read(key: '${_walletId}_mnemonic'); // if (mnemonicString == null) { // return []; // } // final List data = mnemonicString.split(' '); // return data; // } // // Future 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> _fetchAllOwnAddresses() async { // final List allAddresses = []; // // final receivingAddressesP2PKH = DB.instance.get( // boxName: walletId, key: 'receivingAddressesP2PKH') as List; // final changeAddressesP2PKH = // DB.instance.get(boxName: walletId, key: 'changeAddressesP2PKH') // as List; // // // 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 _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 _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(boxName: walletId, key: "receivingIndexP2PKH", value: 0); // await DB.instance // .put(boxName: walletId, key: "changeIndexP2PKH", value: 0); // await DB.instance.put( // 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( // boxName: walletId, // key: 'addressBookEntries', // value: {}); // // // 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 _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 _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(boxName: walletId, key: indexKey)) + 1; // await DB.instance // .put(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 _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(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(boxName: walletId, key: chainArray, value: [address]); // } else { // // Make a deep copy of the existing list // final List newArray = []; // addressArray // .forEach((dynamic _address) => newArray.add(_address as String)); // newArray.add(address); // Add the address passed into the method // await DB.instance // .put(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 _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(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> _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.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 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.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": , // /// "wif": , // /// }, // /// addressB : { // /// "pubKey": , // /// "wif": , // /// }, // /// } // Future addDerivations({ // required int chain, // required DerivePathType derivePathType, // required Map 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.from(jsonDecode(derivationsString ?? "{}") as Map); // // // add derivation // derivations.addAll(derivationsToAdd); // // // save derivations // final newReceiveDerivationsString = jsonEncode(derivations); // await _secureStore.write(key: key, value: newReceiveDerivationsString); // } // // Future _fetchUtxoData() async { // final List allAddresses = await _fetchAllOwnAddresses(); // // try { // final fetchedUtxoList = >>[]; // // final Map>> 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> 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 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"] = {}; // 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 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 allOutputs = dataModel.unspentOutputArray; // Logging.instance // .log('Outputs fetched: $allOutputs', level: LogLevel.Info); // await _sortOutputs(allOutputs); // await DB.instance.put( // boxName: walletId, key: 'latest_utxo_model', value: dataModel); // await DB.instance.put( // 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(boxName: walletId, key: 'latest_utxo_model'); // // if (latestTxModel == null) { // final emptyModel = { // "total_user_currency": "0.00", // "total_sats": 0, // "total_btc": "0", // "outputArray": [] // }; // 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 _sortOutputs(List utxos) async { // final blockedHashArray = // DB.instance.get(boxName: walletId, key: 'blocked_tx_hashes') // as List?; // final List lst = []; // if (blockedHashArray != null) { // for (var hash in blockedHashArray) { // lst.add(hash as String); // } // } // final labels = // DB.instance.get(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 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> _getBatchTxCount({ // required Map addresses, // }) async { // try { // final Map> 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 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 _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: $txCount', // level: LogLevel.Info); // // if (txCount >= 1) { // // First increment the receiving index // await _incrementAddressIndexForChain(0, derivePathType); // // // Check the new receiving index // String indexKey = "receivingIndex"; // switch (derivePathType) { // case DerivePathType.bip44: // indexKey += "P2PKH"; // break; // } // final newReceivingIndex = // DB.instance.get(boxName: walletId, key: indexKey) as int; // // // Use new index to derive a new receiving address // final newReceivingAddress = await _generateAddressForChain( // 0, newReceivingIndex, derivePathType); // // // Add that new receiving address to the array of receiving addresses // await _addToAddressesArrayForChain( // newReceivingAddress, 0, derivePathType); // // // Set the new receiving address that the service // // switch (derivePathType) { // case DerivePathType.bip44: // _currentReceivingAddressP2PKH = Future(() => newReceivingAddress); // break; // } // } // } on SocketException catch (se, s) { // Logging.instance.log( // "SocketException caught in _checkReceivingAddressForTransactions($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 _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: $txCount', // level: LogLevel.Info); // // if (txCount >= 1) { // // First increment the change index // await _incrementAddressIndexForChain(1, derivePathType); // // // Check the new change index // String indexKey = "changeIndex"; // switch (derivePathType) { // case DerivePathType.bip44: // indexKey += "P2PKH"; // break; // } // final newChangeIndex = // DB.instance.get(boxName: walletId, key: indexKey) as int; // // // Use new index to derive a new change address // final newChangeAddress = // await _generateAddressForChain(1, newChangeIndex, derivePathType); // // // Add that new receiving address to the array of change addresses // await _addToAddressesArrayForChain(newChangeAddress, 1, derivePathType); // } // } catch (e, s) { // Logging.instance.log( // "Exception rethrown from _checkChangeAddressForTransactions($derivePathType): $e\n$s", // level: LogLevel.Error); // rethrow; // } // } // // Future _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 checkCurrentReceivingAddressesForTransactions() async { // if (Platform.environment["FLUTTER_TEST"] == "true") { // try { // return _checkCurrentReceivingAddressesForTransactions(); // } catch (_) { // rethrow; // } // } // } // // Future _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 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 = []; // 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>> _fetchHistory( // List allAddresses) async { // try { // List> allTxHashes = []; // // final Map>> batches = {}; // final Map 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> allTransactions, String txid) { // for (int i = 0; i < allTransactions.length; i++) { // if (allTransactions[i]["txid"] == txid) { // return true; // } // } // return false; // } // // Future _fetchTransactionData() async { // final List allAddresses = await _fetchAllOwnAddresses(); // // final changeAddressesP2PKH = // DB.instance.get(boxName: walletId, key: 'changeAddressesP2PKH') // as List; // // final List> allTxHashes = // await _fetchHistory(allAddresses); // // final cachedTransactions = // DB.instance.get(boxName: walletId, key: 'latest_tx_model') // as TransactionData?; // int latestTxnBlockHeight = // DB.instance.get(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> 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> midSortedArray = []; // // for (final txObject in allTransactions) { // List sendersArray = []; // List 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 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"] = []; // 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 result = {"dateTimeChunks": []}; // final dateArray = []; // // 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"] = >[]; // } // 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( // boxName: walletId, // key: 'storedTxnDataHeight', // value: latestTxnBlockHeight); // await DB.instance.put( // 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? utxos}) async { // Logging.instance // .log("Starting coinSelection ----------", level: LogLevel.Info); // final List availableOutputs = utxos ?? outputsList; // final List 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 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 recipientsArray = [_recipientAddress]; // List 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 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 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 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 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 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> fetchBuildTxData( // List utxosToUse, // ) async { // // return data // Map results = {}; // Map> addressTxid = {}; // // // addresses to check // List 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] = []; // } // (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> buildTransaction({ // required List utxosToUse, // required Map utxoSigningData, // required List recipients, // required List satoshiAmounts, // }) async { // final builder = Bitbox.Bitbox.transactionBuilder(); // // // retrieve address' utxos from the rest api // List _utxos = // []; // await Bitbox.Address.utxo(address) as List; // 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 = []; // // // 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: $txHex"); // // return {"hex": txHex, "vSize": vSize}; // } // // @override // Future fullRescan( // int maxUnusedAddressGap, // int maxNumberOfIndexesToCheck, // ) async { // Logging.instance.log("Starting full rescan!", level: LogLevel.Info); // longMutex = true; // GlobalEventBus.instance.fire( // WalletSyncStatusChangedEvent( // WalletSyncStatus.syncing, // walletId, // coin, // ), // ); // // // clear cache // _cachedElectrumXClient.clearSharedTransactionCache(coin: coin); // // // back up data // await _rescanBackup(); // // try { // final mnemonic = await _secureStore.read(key: '${_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 _rescanRestore() async { // Logging.instance.log("starting rescan restore", level: LogLevel.Info); // // // restore from backup // // p2pkh // final tempReceivingAddressesP2PKH = DB.instance // .get(boxName: walletId, key: 'receivingAddressesP2PKH_BACKUP'); // final tempChangeAddressesP2PKH = DB.instance // .get(boxName: walletId, key: 'changeAddressesP2PKH_BACKUP'); // final tempReceivingIndexP2PKH = DB.instance // .get(boxName: walletId, key: 'receivingIndexP2PKH_BACKUP'); // final tempChangeIndexP2PKH = DB.instance // .get(boxName: walletId, key: 'changeIndexP2PKH_BACKUP'); // await DB.instance.put( // boxName: walletId, // key: 'receivingAddressesP2PKH', // value: tempReceivingAddressesP2PKH); // await DB.instance.put( // boxName: walletId, // key: 'changeAddressesP2PKH', // value: tempChangeAddressesP2PKH); // await DB.instance.put( // boxName: walletId, // key: 'receivingIndexP2PKH', // value: tempReceivingIndexP2PKH); // await DB.instance.put( // boxName: walletId, // key: 'changeIndexP2PKH', // value: tempChangeIndexP2PKH); // await DB.instance.delete( // key: 'receivingAddressesP2PKH_BACKUP', boxName: walletId); // await DB.instance // .delete(key: 'changeAddressesP2PKH_BACKUP', boxName: walletId); // await DB.instance // .delete(key: 'receivingIndexP2PKH_BACKUP', boxName: walletId); // await DB.instance // .delete(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(boxName: walletId, key: 'latest_utxo_model_BACKUP'); // await DB.instance.put( // boxName: walletId, key: 'latest_utxo_model', value: utxoData); // await DB.instance // .delete(key: 'latest_utxo_model_BACKUP', boxName: walletId); // // Logging.instance.log("rescan restore complete", level: LogLevel.Info); // } // // Future _rescanBackup() async { // Logging.instance.log("starting rescan backup", level: LogLevel.Info); // // // backup current and clear data // // p2pkh // final tempReceivingAddressesP2PKH = DB.instance // .get(boxName: walletId, key: 'receivingAddressesP2PKH'); // await DB.instance.put( // boxName: walletId, // key: 'receivingAddressesP2PKH_BACKUP', // value: tempReceivingAddressesP2PKH); // await DB.instance // .delete(key: 'receivingAddressesP2PKH', boxName: walletId); // // final tempChangeAddressesP2PKH = DB.instance // .get(boxName: walletId, key: 'changeAddressesP2PKH'); // await DB.instance.put( // boxName: walletId, // key: 'changeAddressesP2PKH_BACKUP', // value: tempChangeAddressesP2PKH); // await DB.instance // .delete(key: 'changeAddressesP2PKH', boxName: walletId); // // final tempReceivingIndexP2PKH = // DB.instance.get(boxName: walletId, key: 'receivingIndexP2PKH'); // await DB.instance.put( // boxName: walletId, // key: 'receivingIndexP2PKH_BACKUP', // value: tempReceivingIndexP2PKH); // await DB.instance // .delete(key: 'receivingIndexP2PKH', boxName: walletId); // // final tempChangeIndexP2PKH = // DB.instance.get(boxName: walletId, key: 'changeIndexP2PKH'); // await DB.instance.put( // boxName: walletId, // key: 'changeIndexP2PKH_BACKUP', // value: tempChangeIndexP2PKH); // await DB.instance // .delete(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(boxName: walletId, key: 'latest_utxo_model'); // await DB.instance.put( // boxName: walletId, key: 'latest_utxo_model_BACKUP', value: utxoData); // await DB.instance // .delete(key: 'latest_utxo_model', boxName: walletId); // // Logging.instance.log("rescan backup complete", level: LogLevel.Info); // } // // @override // set isFavorite(bool markFavorite) { // DB.instance.put( // boxName: walletId, key: "isFavorite", value: markFavorite); // } // // @override // bool get isFavorite { // try { // return DB.instance.get(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 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 generateNewAddress() async { // try { // await _incrementAddressIndexForChain( // 0, DerivePathType.bip44); // First increment the receiving index // final newReceivingIndex = DB.instance.get( // 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);