mirror of
https://github.com/cake-tech/cake_wallet.git
synced 2024-11-01 01:47:41 +00:00
146 lines
4.8 KiB
Dart
146 lines
4.8 KiB
Dart
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import 'dart:convert';
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import 'package:cake_wallet/bitcoin/bitcoin_wallet.dart';
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import 'package:flutter/foundation.dart';
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import 'package:rxdart/rxdart.dart';
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import 'package:cake_wallet/bitcoin/bitcoin_transaction_info.dart';
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import 'package:cake_wallet/bitcoin/electrum.dart';
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import 'package:cake_wallet/src/domain/common/transaction_history.dart';
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import 'package:cake_wallet/src/domain/common/transaction_info.dart';
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import 'package:cake_wallet/bitcoin/file.dart';
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class BitcoinTransactionHistory extends TransactionHistory {
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BitcoinTransactionHistory(
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{@required this.eclient,
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@required this.path,
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@required String password,
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@required this.wallet})
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: _transactions = BehaviorSubject<List<TransactionInfo>>.seeded([]),
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_password = password,
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_height = 0;
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final BitcoinWallet wallet;
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final ElectrumClient eclient;
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final String path;
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final String _password;
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int _height;
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@override
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Observable<List<TransactionInfo>> get transactions => _transactions.stream;
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List<TransactionInfo> get transactionsAll => _transactions.value;
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final BehaviorSubject<List<TransactionInfo>> _transactions;
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bool _isUpdating = false;
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Future<void> init() async {
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final info = await _read();
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_height = (info['height'] as int) ?? _height;
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_transactions.value = info['transactions'] as List<TransactionInfo>;
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}
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@override
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Future<List<TransactionInfo>> getAll() async => _transactions.value;
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@override
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Future update() async {
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if (_isUpdating) {
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return;
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}
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try {
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_isUpdating = true;
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final newTransasctions = await fetchTransactions();
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_transactions.value = _transactions.value + newTransasctions;
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_updateHeight();
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await save();
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_isUpdating = false;
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} catch (e) {
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_isUpdating = false;
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rethrow;
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}
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}
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Future<Map<String, Object>> fetchTransactionInfo(
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{@required String hash, @required int height}) async {
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final rawFetching = eclient.getTransactionRaw(hash: hash);
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final headerFetching = eclient.getHeader(height: height);
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final result = await Future.wait([rawFetching, headerFetching]);
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final raw = result.first as String;
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final header = result[1] as Map<String, Object>;
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return {'raw': raw, 'header': header};
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}
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Future<List<BitcoinTransactionInfo>> fetchTransactions() async {
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final addresses = wallet.getAddresses();
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final histories =
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addresses.map((address) => eclient.getHistory(address: address));
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final _historiesWithDetails = await Future.wait(histories)
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.then((histories) => histories
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.map((h) => h.where((tx) => (tx['height'] as int) > _height))
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.expand((i) => i)
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.toList())
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.then((histories) => histories.map((tx) => fetchTransactionInfo(
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hash: tx['tx_hash'] as String, height: tx['height'] as int)));
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final historiesWithDetails = await Future.wait(_historiesWithDetails);
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return historiesWithDetails
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.map((info) => BitcoinTransactionInfo.fromHexAndHeader(
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info['raw'] as String, info['header'] as Map<String, Object>,
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addresses: addresses))
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.toList();
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}
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Future<void> add(List<BitcoinTransactionInfo> transactions) async {
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final txs = await getAll()
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..addAll(transactions);
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await writeData(
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path: path,
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password: _password,
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data: json
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.encode(txs.map((tx) => (tx as BitcoinTransactionInfo).toJson())));
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}
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Future<void> addOne(BitcoinTransactionInfo tx) async {
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final txs = await getAll()
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..add(tx);
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await writeData(
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path: path,
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password: _password,
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data: json
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.encode(txs.map((tx) => (tx as BitcoinTransactionInfo).toJson())));
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}
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Future<void> save() async => writeData(
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path: path,
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password: _password,
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data: json
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.encode({'height': _height, 'transactions': _transactions.value}));
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Future<Map<String, Object>> _read() async {
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try {
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final content = await read(path: path, password: _password);
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final jsoned = json.decode(content) as Map<String, Object>;
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final height = jsoned['height'] as int;
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final transactions = (jsoned['transactions'] as List<dynamic>)
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.map((dynamic row) {
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if (row is Map<String, Object>) {
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return BitcoinTransactionInfo.fromJson(row);
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}
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return null;
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})
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.where((el) => el != null)
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.toList();
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return {'transactions': transactions, 'height': height};
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} catch (_) {
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return {'transactions': List<TransactionInfo>(), 'height': 0};
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}
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}
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void _updateHeight() {
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final int newHeight = _transactions.value
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.fold(0, (acc, val) => val.height > acc ? val.height : acc);
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_height = newHeight > _height ? newHeight : _height;
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}
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}
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