cake_wallet/cw_bitcoin/lib/electrum_wallet_addresses.dart
2024-04-09 19:27:26 -03:00

568 lines
19 KiB
Dart

import 'package:bitcoin_base/bitcoin_base.dart';
import 'package:bitcoin_flutter/bitcoin_flutter.dart' as bitcoin;
import 'package:blockchain_utils/blockchain_utils.dart';
import 'package:cw_bitcoin/bitcoin_address_record.dart';
import 'package:cw_core/wallet_addresses.dart';
import 'package:cw_core/wallet_info.dart';
import 'package:cw_core/wallet_type.dart';
import 'package:mobx/mobx.dart';
part 'electrum_wallet_addresses.g.dart';
class ElectrumWalletAddresses = ElectrumWalletAddressesBase with _$ElectrumWalletAddresses;
const List<BitcoinAddressType> ADDRESS_TYPES = [
SegwitAddresType.p2wpkh,
P2pkhAddressType.p2pkh,
SegwitAddresType.p2tr,
SegwitAddresType.p2wsh,
P2shAddressType.p2wpkhInP2sh,
];
abstract class ElectrumWalletAddressesBase extends WalletAddresses with Store {
ElectrumWalletAddressesBase(
WalletInfo walletInfo, {
required this.mainHd,
required this.sideHd,
required this.network,
List<BitcoinAddressRecord>? initialAddresses,
Map<String, int>? initialRegularAddressIndex,
Map<String, int>? initialChangeAddressIndex,
List<BitcoinSilentPaymentAddressRecord>? initialSilentAddresses,
int initialSilentAddressIndex = 1,
bitcoin.HDWallet? masterHd,
BitcoinAddressType? initialAddressPageType,
}) : _addresses = ObservableList<BitcoinAddressRecord>.of((initialAddresses ?? []).toSet()),
addressesByReceiveType =
ObservableList<BaseBitcoinAddressRecord>.of((<BitcoinAddressRecord>[]).toSet()),
receiveAddresses = ObservableList<BitcoinAddressRecord>.of((initialAddresses ?? [])
.where((addressRecord) => !addressRecord.isHidden && !addressRecord.isUsed)
.toSet()),
changeAddresses = ObservableList<BitcoinAddressRecord>.of((initialAddresses ?? [])
.where((addressRecord) => addressRecord.isHidden && !addressRecord.isUsed)
.toSet()),
currentReceiveAddressIndexByType = initialRegularAddressIndex ?? {},
currentChangeAddressIndexByType = initialChangeAddressIndex ?? {},
_addressPageType = initialAddressPageType ??
(walletInfo.addressPageType != null
? BitcoinAddressType.fromValue(walletInfo.addressPageType!)
: SegwitAddresType.p2wpkh),
silentAddresses = ObservableList<BitcoinSilentPaymentAddressRecord>.of(
(initialSilentAddresses ?? []).toSet()),
currentSilentAddressIndex = initialSilentAddressIndex,
super(walletInfo) {
if (masterHd != null) {
silentAddress = SilentPaymentOwner.fromPrivateKeys(
b_scan: ECPrivate.fromHex(masterHd.derivePath(SCAN_PATH).privKey!),
b_spend: ECPrivate.fromHex(masterHd.derivePath(SPEND_PATH).privKey!),
hrp: network == BitcoinNetwork.testnet ? 'tsp' : 'sp');
if (silentAddresses.length == 0)
silentAddresses.add(BitcoinSilentPaymentAddressRecord(
silentAddress.toString(),
index: 1,
isHidden: false,
name: "",
silentPaymentTweak: null,
network: network,
type: SilentPaymentsAddresType.p2sp,
));
}
updateAddressesByMatch();
}
static const defaultReceiveAddressesCount = 22;
static const defaultChangeAddressesCount = 17;
static const gap = 20;
final ObservableList<BitcoinAddressRecord> _addresses;
late ObservableList<BaseBitcoinAddressRecord> addressesByReceiveType;
final ObservableList<BitcoinAddressRecord> receiveAddresses;
final ObservableList<BitcoinAddressRecord> changeAddresses;
final ObservableList<BitcoinSilentPaymentAddressRecord> silentAddresses;
final BasedUtxoNetwork network;
final bitcoin.HDWallet mainHd;
final bitcoin.HDWallet sideHd;
@observable
SilentPaymentOwner? silentAddress;
@observable
late BitcoinAddressType _addressPageType;
@computed
BitcoinAddressType get addressPageType => _addressPageType;
@observable
String? activeSilentAddress;
@computed
List<BitcoinAddressRecord> get allAddresses => _addresses;
@override
@computed
String get address {
if (addressPageType == SilentPaymentsAddresType.p2sp) {
if (activeSilentAddress != null) {
return activeSilentAddress!;
}
return silentAddress.toString();
}
String receiveAddress;
final typeMatchingReceiveAddresses =
receiveAddresses.where(_isAddressPageTypeMatch).where((addr) => !addr.isUsed);
if ((isEnabledAutoGenerateSubaddress && receiveAddresses.isEmpty) ||
typeMatchingReceiveAddresses.isEmpty) {
receiveAddress = generateNewAddress().address;
} else {
final previousAddressMatchesType =
previousAddressRecord != null && previousAddressRecord!.type == addressPageType;
if (previousAddressMatchesType &&
typeMatchingReceiveAddresses.first.address != addressesByReceiveType.first.address) {
receiveAddress = previousAddressRecord!.address;
} else {
receiveAddress = typeMatchingReceiveAddresses.first.address;
}
}
return receiveAddress;
}
@observable
bool isEnabledAutoGenerateSubaddress = true;
@override
set address(String addr) {
if (addressPageType == SilentPaymentsAddresType.p2sp) {
final selected = silentAddresses.firstWhere((addressRecord) => addressRecord.address == addr);
if (selected.silentPaymentTweak != null && silentAddress != null) {
activeSilentAddress =
silentAddress!.toLabeledSilentPaymentAddress(selected.index).toString();
} else {
activeSilentAddress = silentAddress!.toString();
}
return;
}
final addressRecord = _addresses.firstWhere((addressRecord) => addressRecord.address == addr);
previousAddressRecord = addressRecord;
receiveAddresses.remove(addressRecord);
receiveAddresses.insert(0, addressRecord);
}
@override
String get primaryAddress => getAddress(index: 0, hd: mainHd, addressType: addressPageType);
Map<String, int> currentReceiveAddressIndexByType;
int get currentReceiveAddressIndex =>
currentReceiveAddressIndexByType[_addressPageType.toString()] ?? 0;
void set currentReceiveAddressIndex(int index) =>
currentReceiveAddressIndexByType[_addressPageType.toString()] = index;
Map<String, int> currentChangeAddressIndexByType;
int get currentChangeAddressIndex =>
currentChangeAddressIndexByType[_addressPageType.toString()] ?? 0;
void set currentChangeAddressIndex(int index) =>
currentChangeAddressIndexByType[_addressPageType.toString()] = index;
int currentSilentAddressIndex;
@observable
BitcoinAddressRecord? previousAddressRecord;
@computed
int get totalCountOfReceiveAddresses => addressesByReceiveType.fold(0, (acc, addressRecord) {
if (!addressRecord.isHidden) {
return acc + 1;
}
return acc;
});
@computed
int get totalCountOfChangeAddresses => addressesByReceiveType.fold(0, (acc, addressRecord) {
if (addressRecord.isHidden) {
return acc + 1;
}
return acc;
});
@override
Future<void> init() async {
if (walletInfo.type == WalletType.bitcoinCash) {
await _generateInitialAddresses(type: P2pkhAddressType.p2pkh);
} else if (walletInfo.type == WalletType.litecoin) {
await _generateInitialAddresses();
} else if (walletInfo.type == WalletType.bitcoin) {
await _generateInitialAddresses();
await _generateInitialAddresses(type: P2pkhAddressType.p2pkh);
await _generateInitialAddresses(type: P2shAddressType.p2wpkhInP2sh);
await _generateInitialAddresses(type: SegwitAddresType.p2tr);
await _generateInitialAddresses(type: SegwitAddresType.p2wsh);
}
updateAddressesByMatch();
updateReceiveAddresses();
updateChangeAddresses();
await updateAddressesInBox();
if (currentReceiveAddressIndex >= receiveAddresses.length) {
currentReceiveAddressIndex = 0;
}
if (currentChangeAddressIndex >= changeAddresses.length) {
currentChangeAddressIndex = 0;
}
}
@action
Future<String> getChangeAddress() async {
updateChangeAddresses();
if (changeAddresses.isEmpty) {
final newAddresses = await _createNewAddresses(gap,
startIndex: totalCountOfChangeAddresses > 0 ? totalCountOfChangeAddresses - 1 : 0,
isHidden: true);
addAddresses(newAddresses);
}
if (currentChangeAddressIndex >= changeAddresses.length) {
currentChangeAddressIndex = 0;
}
updateChangeAddresses();
final address = changeAddresses[currentChangeAddressIndex].address;
currentChangeAddressIndex += 1;
return address;
}
Map<String, String> get labels {
final G = ECPublic.fromBytes(BigintUtils.toBytes(Curves.generatorSecp256k1.x, length: 32));
final labels = <String, String>{};
for (int i = 0; i < silentAddresses.length; i++) {
final silentAddressRecord = silentAddresses[i];
final silentPaymentTweak = silentAddressRecord.silentPaymentTweak;
if (silentPaymentTweak != null &&
SilentPaymentAddress.regex.hasMatch(silentAddressRecord.address)) {
labels[G
.tweakMul(BigintUtils.fromBytes(BytesUtils.fromHexString(silentPaymentTweak)))
.toHex()] = silentPaymentTweak;
}
}
return labels;
}
@action
BaseBitcoinAddressRecord generateNewAddress({String label = ''}) {
if (addressPageType == SilentPaymentsAddresType.p2sp && silentAddress != null) {
final currentSilentAddressIndex = silentAddresses
.where((addressRecord) => addressRecord.type != SegwitAddresType.p2tr)
.length +
1;
this.currentSilentAddressIndex = currentSilentAddressIndex;
final address = BitcoinSilentPaymentAddressRecord(
silentAddress!.toLabeledSilentPaymentAddress(currentSilentAddressIndex).toString(),
index: currentSilentAddressIndex,
isHidden: false,
name: label,
silentPaymentTweak:
BytesUtils.toHexString(silentAddress!.generateLabel(currentSilentAddressIndex)),
network: network,
type: SilentPaymentsAddresType.p2sp,
);
silentAddresses.add(address);
updateAddressesByMatch();
return address;
}
final newAddressIndex = addressesByReceiveType.fold(
0, (int acc, addressRecord) => addressRecord.isHidden == false ? acc + 1 : acc);
final address = BitcoinAddressRecord(
getAddress(index: newAddressIndex, hd: mainHd, addressType: addressPageType),
index: newAddressIndex,
isHidden: false,
name: label,
type: addressPageType,
network: network,
);
_addresses.add(address);
updateAddressesByMatch();
return address;
}
String getAddress(
{required int index, required bitcoin.HDWallet hd, BitcoinAddressType? addressType}) =>
'';
@override
Future<void> updateAddressesInBox() async {
try {
addressesMap.clear();
addressesMap[address] = 'Active';
allAddressesMap.clear();
_addresses.forEach((addressRecord) {
allAddressesMap[addressRecord.address] = addressRecord.name;
});
final lastP2wpkh = _addresses
.where((addressRecord) =>
_isUnusedReceiveAddressByType(addressRecord, SegwitAddresType.p2wpkh))
.toList()
.last;
if (lastP2wpkh.address != address) {
addressesMap[lastP2wpkh.address] = 'P2WPKH';
} else {
addressesMap[address] = 'Active - P2WPKH';
}
final lastP2pkh = _addresses.firstWhere(
(addressRecord) => _isUnusedReceiveAddressByType(addressRecord, P2pkhAddressType.p2pkh));
if (lastP2pkh.address != address) {
addressesMap[lastP2pkh.address] = 'P2PKH';
} else {
addressesMap[address] = 'Active - P2PKH';
}
final lastP2sh = _addresses.firstWhere((addressRecord) =>
_isUnusedReceiveAddressByType(addressRecord, P2shAddressType.p2wpkhInP2sh));
if (lastP2sh.address != address) {
addressesMap[lastP2sh.address] = 'P2SH';
} else {
addressesMap[address] = 'Active - P2SH';
}
final lastP2tr = _addresses.firstWhere(
(addressRecord) => _isUnusedReceiveAddressByType(addressRecord, SegwitAddresType.p2tr));
if (lastP2tr.address != address) {
addressesMap[lastP2tr.address] = 'P2TR';
} else {
addressesMap[address] = 'Active - P2TR';
}
final lastP2wsh = _addresses.firstWhere(
(addressRecord) => _isUnusedReceiveAddressByType(addressRecord, SegwitAddresType.p2wsh));
if (lastP2wsh.address != address) {
addressesMap[lastP2wsh.address] = 'P2WSH';
} else {
addressesMap[address] = 'Active - P2WSH';
}
silentAddresses.forEach((addressRecord) {
if (addressRecord.type != SilentPaymentsAddresType.p2sp) {
return;
}
if (addressRecord.address != address) {
addressesMap[addressRecord.address] = addressRecord.name.isEmpty
? "Silent Payments"
: "Silent Payments - " + addressRecord.name;
} else {
addressesMap[address] = 'Active - Silent Payments';
}
});
await saveAddressesInBox();
} catch (e) {
print(e.toString());
}
}
@action
void updateAddress(String address, String label) {
BaseBitcoinAddressRecord? foundAddress;
_addresses.forEach((addressRecord) {
if (addressRecord.address == address) {
foundAddress = addressRecord;
}
});
silentAddresses.forEach((addressRecord) {
if (addressRecord.address == address) {
foundAddress = addressRecord;
}
});
if (foundAddress != null) {
foundAddress!.setNewName(label);
if (foundAddress is BitcoinAddressRecord) {
final index = _addresses.indexOf(foundAddress);
_addresses.remove(foundAddress);
_addresses.insert(index, foundAddress as BitcoinAddressRecord);
} else {
final index = silentAddresses.indexOf(foundAddress as BitcoinSilentPaymentAddressRecord);
silentAddresses.remove(foundAddress);
silentAddresses.insert(index, foundAddress as BitcoinSilentPaymentAddressRecord);
}
}
}
@action
void updateAddressesByMatch() {
if (addressPageType == SilentPaymentsAddresType.p2sp) {
addressesByReceiveType.clear();
addressesByReceiveType.addAll(silentAddresses);
return;
}
addressesByReceiveType.clear();
addressesByReceiveType.addAll(_addresses.where(_isAddressPageTypeMatch).toList());
}
@action
void updateReceiveAddresses() {
receiveAddresses.removeRange(0, receiveAddresses.length);
final newAddresses =
_addresses.where((addressRecord) => !addressRecord.isHidden && !addressRecord.isUsed);
receiveAddresses.addAll(newAddresses);
}
@action
void updateChangeAddresses() {
changeAddresses.removeRange(0, changeAddresses.length);
final newAddresses = _addresses.where((addressRecord) =>
addressRecord.isHidden &&
!addressRecord.isUsed &&
// TODO: feature to change change address type. For now fixed to p2wpkh, the cheapest type
(walletInfo.type != WalletType.bitcoin || addressRecord.type == SegwitAddresType.p2wpkh));
changeAddresses.addAll(newAddresses);
}
@action
Future<void> discoverAddresses(List<BitcoinAddressRecord> addressList, bool isHidden,
Future<String?> Function(BitcoinAddressRecord, Set<String>) getAddressHistory,
{BitcoinAddressType type = SegwitAddresType.p2wpkh}) async {
if (!isHidden) {
_validateSideHdAddresses(addressList.toList());
}
final newAddresses = await _createNewAddresses(gap,
startIndex: addressList.length, isHidden: isHidden, type: type);
addAddresses(newAddresses);
final addressesWithHistory = await Future.wait(newAddresses
.map((addr) => getAddressHistory(addr, _addresses.map((e) => e.address).toSet())));
final isLastAddressUsed = addressesWithHistory.last == addressList.last.address;
if (isLastAddressUsed) {
discoverAddresses(addressList, isHidden, getAddressHistory, type: type);
}
}
Future<void> _generateInitialAddresses(
{BitcoinAddressType type = SegwitAddresType.p2wpkh}) async {
var countOfReceiveAddresses = 0;
var countOfHiddenAddresses = 0;
_addresses.forEach((addr) {
if (addr.type == type) {
if (addr.isHidden) {
countOfHiddenAddresses += 1;
return;
}
countOfReceiveAddresses += 1;
}
});
if (countOfReceiveAddresses < defaultReceiveAddressesCount) {
final addressesCount = defaultReceiveAddressesCount - countOfReceiveAddresses;
final newAddresses = await _createNewAddresses(addressesCount,
startIndex: countOfReceiveAddresses, isHidden: false, type: type);
addAddresses(newAddresses);
}
if (countOfHiddenAddresses < defaultChangeAddressesCount) {
final addressesCount = defaultChangeAddressesCount - countOfHiddenAddresses;
final newAddresses = await _createNewAddresses(addressesCount,
startIndex: countOfHiddenAddresses, isHidden: true, type: type);
addAddresses(newAddresses);
}
}
Future<List<BitcoinAddressRecord>> _createNewAddresses(int count,
{int startIndex = 0, bool isHidden = false, BitcoinAddressType? type}) async {
final list = <BitcoinAddressRecord>[];
for (var i = startIndex; i < count + startIndex; i++) {
final address = BitcoinAddressRecord(
getAddress(index: i, hd: _getHd(isHidden), addressType: type ?? addressPageType),
index: i,
isHidden: isHidden,
type: type ?? addressPageType,
network: network,
);
list.add(address);
}
return list;
}
@action
void addAddresses(Iterable<BitcoinAddressRecord> addresses) {
final addressesSet = this._addresses.toSet();
addressesSet.addAll(addresses);
this._addresses.clear();
this._addresses.addAll(addressesSet);
updateAddressesByMatch();
}
@action
void addSilentAddresses(Iterable<BitcoinSilentPaymentAddressRecord> addresses) {
final addressesSet = this.silentAddresses.toSet();
addressesSet.addAll(addresses);
this.silentAddresses.clear();
this.silentAddresses.addAll(addressesSet);
updateAddressesByMatch();
}
void _validateSideHdAddresses(List<BitcoinAddressRecord> addrWithTransactions) {
addrWithTransactions.forEach((element) {
if (element.address !=
getAddress(index: element.index, hd: mainHd, addressType: element.type))
element.isHidden = true;
});
}
@action
Future<void> setAddressType(BitcoinAddressType type) async {
_addressPageType = type;
updateAddressesByMatch();
walletInfo.addressPageType = addressPageType.toString();
await walletInfo.save();
}
bool _isAddressPageTypeMatch(BitcoinAddressRecord addressRecord) {
return _isAddressByType(addressRecord, addressPageType);
}
bitcoin.HDWallet _getHd(bool isHidden) => isHidden ? sideHd : mainHd;
bool _isAddressByType(BitcoinAddressRecord addr, BitcoinAddressType type) => addr.type == type;
bool _isUnusedReceiveAddressByType(BitcoinAddressRecord addr, BitcoinAddressType type) =>
!addr.isHidden && !addr.isUsed && addr.type == type;
@action
void deleteSilentPaymentAddress(String address) {
final addressRecord = silentAddresses.firstWhere((addressRecord) =>
addressRecord.type == SilentPaymentsAddresType.p2sp && addressRecord.address == address);
silentAddresses.remove(addressRecord);
updateAddressesByMatch();
}
}