mirror of
https://github.com/cake-tech/cake_wallet.git
synced 2024-12-25 04:59:33 +00:00
339 lines
9.7 KiB
Dart
339 lines
9.7 KiB
Dart
import 'dart:convert';
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import 'package:cw_core/crypto_currency.dart';
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import 'package:cw_core/node.dart';
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import 'package:cw_core/pathForWallet.dart';
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import 'package:cw_core/pending_transaction.dart';
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import 'package:cw_core/sync_status.dart';
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import 'package:cw_core/transaction_direction.dart';
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import 'package:cw_core/transaction_priority.dart';
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import 'package:cw_core/wallet_addresses.dart';
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import 'package:cw_core/wallet_info.dart';
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import 'package:cw_nano/file.dart';
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import 'package:cw_nano/nano_balance.dart';
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import 'package:cw_nano/nano_client.dart';
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import 'package:cw_nano/nano_transaction_credentials.dart';
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import 'package:cw_nano/nano_transaction_history.dart';
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import 'package:cw_nano/nano_transaction_info.dart';
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import 'package:cw_nano/nano_util.dart';
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import 'package:cw_nano/nano_wallet_info.dart';
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import 'package:cw_nano/nano_wallet_keys.dart';
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import 'package:cw_nano/pending_nano_transaction.dart';
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import 'package:mobx/mobx.dart';
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import 'dart:async';
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import 'package:cw_nano/nano_wallet_addresses.dart';
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import 'package:cw_core/wallet_base.dart';
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import 'package:nanodart/nanodart.dart';
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import 'package:web3dart/web3dart.dart';
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import 'package:bip39/bip39.dart' as bip39;
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import 'package:bip32/bip32.dart' as bip32;
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part 'nano_wallet.g.dart';
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class NanoWallet = NanoWalletBase with _$NanoWallet;
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abstract class NanoWalletBase
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extends WalletBase<NanoBalance, NanoTransactionHistory, NanoTransactionInfo> with Store {
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NanoWalletBase({
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required NanoWalletInfo walletInfo,
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required String mnemonic,
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required String password,
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NanoBalance? initialBalance,
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}) : syncStatus = NotConnectedSyncStatus(),
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_password = password,
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_mnemonic = mnemonic,
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_derivationType = walletInfo.derivationType,
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_isTransactionUpdating = false,
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_client = NanoClient(),
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walletAddresses = NanoWalletAddresses(walletInfo),
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balance = ObservableMap<CryptoCurrency, NanoBalance>.of({
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CryptoCurrency.nano: initialBalance ??
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NanoBalance(currentBalance: BigInt.zero, receivableBalance: BigInt.zero)
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}),
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super(walletInfo) {
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this.walletInfo = walletInfo;
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transactionHistory = NanoTransactionHistory(walletInfo: walletInfo, password: password);
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}
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final String _mnemonic;
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final String _password;
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final DerivationType _derivationType;
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late final String _privateKey;
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late final String _publicAddress;
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late final String _seedKey;
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late NanoClient _client;
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bool _isTransactionUpdating;
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@override
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WalletAddresses walletAddresses;
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@override
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@observable
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SyncStatus syncStatus;
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@override
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@observable
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late ObservableMap<CryptoCurrency, NanoBalance> balance;
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// initialize the different forms of private / public key we'll need:
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Future<void> init() async {
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final String type = (_derivationType == DerivationType.nano) ? "standard" : "hd";
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_seedKey = bip39.mnemonicToEntropy(_mnemonic).toUpperCase();
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_privateKey = await NanoUtil.uniSeedToPrivate(_seedKey, 0, type);
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_publicAddress = await NanoUtil.uniSeedToAddress(_seedKey, 0, type);
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this.walletInfo.address = _publicAddress;
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await walletAddresses.init();
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await transactionHistory.init();
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await save();
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}
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@override
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int calculateEstimatedFee(TransactionPriority priority, int? amount) {
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return 0; // always 0 :)
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}
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@override
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Future<void> changePassword(String password) {
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print("e");
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throw UnimplementedError("changePassword");
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}
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@override
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void close() {
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_client.stop();
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}
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@action
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@override
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Future<void> connectToNode({required Node node}) async {
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try {
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syncStatus = ConnectingSyncStatus();
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final isConnected = _client.connect(node);
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if (!isConnected) {
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throw Exception("Ethereum Node connection failed");
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}
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// _client.setListeners(_privateKey.address, _onNewTransaction);
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await _updateBalance();
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await _receiveAll();
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syncStatus = ConnectedSyncStatus();
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} catch (e) {
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syncStatus = FailedSyncStatus();
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}
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}
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@override
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Future<PendingTransaction> createTransaction(Object credentials) async {
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credentials = credentials as NanoTransactionCredentials;
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BigInt runningAmount = BigInt.zero;
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await _updateBalance();
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BigInt runningBalance = balance[currency]?.currentBalance ?? BigInt.zero;
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final List<Map<String, String>> blocks = [];
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String? previousHash;
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for (var txOut in credentials.outputs) {
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late BigInt amt;
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if (txOut.sendAll) {
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amt = balance[currency]?.currentBalance ?? BigInt.zero;
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} else {
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amt = BigInt.tryParse(
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NanoUtil.getAmountAsRaw(txOut.cryptoAmount ?? "0", NanoUtil.rawPerNano)) ??
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BigInt.zero;
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}
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runningBalance = runningBalance - amt;
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final block = await _client.constructSendBlock(
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amountRaw: amt.toString(),
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destinationAddress: txOut.address,
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privateKey: _privateKey,
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balanceAfterTx: runningBalance,
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previousHash: previousHash,
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);
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previousHash = NanoBlocks.computeStateHash(
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NanoAccountType.NANO,
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block["account"]!,
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block["previous"]!,
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block["representative"]!,
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BigInt.parse(block["balance"]!),
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block["link"]!,
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);
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blocks.add(block);
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runningAmount += amt;
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}
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try {
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if (runningAmount > balance[currency]!.currentBalance || runningBalance < BigInt.zero) {
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throw Exception(("Trying to send more than entire balance!"));
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}
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} catch (e) {
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rethrow;
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}
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return PendingNanoTransaction(
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amount: runningAmount,
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fee: 0,
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id: "",
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nanoClient: _client,
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blocks: blocks,
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);
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}
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Future<void> _receiveAll() async {
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int blocksReceived = await this._client.confirmAllReceivable(
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destinationAddress: _publicAddress,
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privateKey: _privateKey,
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);
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if (blocksReceived > 0) {
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await Future<void>.delayed(Duration(seconds: 3));
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_updateBalance();
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updateTransactions();
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}
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}
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Future<void> updateTransactions() async {
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try {
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if (_isTransactionUpdating) {
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return;
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}
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_isTransactionUpdating = true;
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final transactions = await fetchTransactions();
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transactionHistory.addMany(transactions);
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await transactionHistory.save();
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_isTransactionUpdating = false;
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} catch (_) {
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_isTransactionUpdating = false;
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}
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}
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@override
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Future<Map<String, NanoTransactionInfo>> fetchTransactions() async {
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String address = _publicAddress;
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final transactions = await _client.fetchTransactions(address);
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final Map<String, NanoTransactionInfo> result = {};
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for (var transactionModel in transactions) {
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result[transactionModel.hash] = NanoTransactionInfo(
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id: transactionModel.hash,
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amountRaw: transactionModel.amount,
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height: transactionModel.height,
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direction: transactionModel.account == address
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? TransactionDirection.outgoing
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: TransactionDirection.incoming,
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confirmed: transactionModel.confirmed,
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date: transactionModel.date ?? DateTime.now(),
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confirmations: transactionModel.confirmed ? 1 : 0,
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);
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}
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return result;
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}
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@override
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NanoWalletKeys get keys {
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return NanoWalletKeys(seedKey: _seedKey);
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}
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@override
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Future<void> rescan({required int height}) async {
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fetchTransactions();
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_updateBalance();
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return;
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}
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@override
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Future<void> save() async {
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await walletAddresses.updateAddressesInBox();
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final path = await makePath();
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await write(path: path, password: _password, data: toJSON());
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await transactionHistory.save();
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}
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@override
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String get seed => _mnemonic;
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@action
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@override
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Future<void> startSync() async {
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try {
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syncStatus = AttemptingSyncStatus();
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await _updateBalance();
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await updateTransactions();
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Timer.periodic(
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const Duration(minutes: 1),
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(timer) async => await _receiveAll(),
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);
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syncStatus = SyncedSyncStatus();
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} catch (e) {
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syncStatus = FailedSyncStatus();
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}
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}
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Future<String> makePath() async => pathForWallet(name: walletInfo.name, type: walletInfo.type);
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String toJSON() => json.encode({
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'seedKey': _seedKey,
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'mnemonic': _mnemonic,
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// 'balance': balance[currency]!.toJSON(),
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'derivationType': _derivationType.toString()
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});
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static Future<NanoWallet> open({
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required String name,
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required String password,
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required WalletInfo walletInfo,
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}) async {
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final path = await pathForWallet(name: name, type: walletInfo.type);
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final jsonSource = await read(path: path, password: password);
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final data = json.decode(jsonSource) as Map;
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final mnemonic = data['mnemonic'] as String;
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final balance = NanoBalance.fromString(
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formattedCurrentBalance: data['balance'] as String? ?? "0",
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formattedReceivableBalance: "0");
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DerivationType derivationType = DerivationType.bip39;
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if (data['derivationType'] == "DerivationType.nano") {
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derivationType = DerivationType.nano;
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}
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final nanoWalletInfo = NanoWalletInfo(
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walletInfo: walletInfo,
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derivationType: derivationType,
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);
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return NanoWallet(
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walletInfo: nanoWalletInfo,
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password: password,
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mnemonic: mnemonic,
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initialBalance: balance,
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);
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}
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Future<void> _updateBalance() async {
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balance[currency] = await _client.getBalance(_publicAddress);
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await save();
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}
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Future<void>? updateBalance() async => await _updateBalance();
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void _onNewTransaction(FilterEvent event) {
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throw UnimplementedError();
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}
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@override
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Future<void> renameWalletFiles(String newWalletName) async {
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print("rename");
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throw UnimplementedError();
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}
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}
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