stack_wallet/lib/wallets/wallet/intermediate/bip39_hd_wallet.dart

172 lines
5.4 KiB
Dart

import 'package:bip39/bip39.dart' as bip39;
import 'package:coinlib_flutter/coinlib_flutter.dart' as coinlib;
import 'package:isar/isar.dart';
import 'package:stackwallet/models/balance.dart';
import 'package:stackwallet/models/isar/models/blockchain_data/address.dart';
import 'package:stackwallet/utilities/amount/amount.dart';
import 'package:stackwallet/utilities/enums/derive_path_type_enum.dart';
import 'package:stackwallet/wallets/crypto_currency/intermediate/bip39_hd_currency.dart';
import 'package:stackwallet/wallets/wallet/intermediate/bip39_wallet.dart';
import 'package:stackwallet/wallets/wallet/wallet_mixin_interfaces/multi_address_interface.dart';
abstract class Bip39HDWallet<T extends Bip39HDCurrency> extends Bip39Wallet<T>
with MultiAddressInterface<T> {
Bip39HDWallet(T cryptoCurrency) : super(cryptoCurrency);
Future<coinlib.HDPrivateKey> getRootHDNode() async {
final seed = bip39.mnemonicToSeed(
await getMnemonic(),
passphrase: await getMnemonicPassphrase(),
);
return coinlib.HDPrivateKey.fromSeed(seed);
}
/// Generates a receiving address. If none
/// are in the current wallet db it will generate at index 0, otherwise the
/// highest index found in the current wallet db.
@override
Future<void> generateNewReceivingAddress() async {
final current = await getCurrentReceivingAddress();
final index = current == null ? 0 : current.derivationIndex + 1;
const chain = 0; // receiving address
final address = await _generateAddress(
chain: chain,
index: index,
derivePathType: DerivePathTypeExt.primaryFor(info.coin),
);
await mainDB.updateOrPutAddresses([address]);
await info.updateReceivingAddress(
newAddress: address.value,
isar: mainDB.isar,
);
}
/// Generates a change address. If none
/// are in the current wallet db it will generate at index 0, otherwise the
/// highest index found in the current wallet db.
@override
Future<void> generateNewChangeAddress() async {
final current = await getCurrentChangeAddress();
final index = current == null ? 0 : current.derivationIndex + 1;
const chain = 1; // change address
final address = await _generateAddress(
chain: chain,
index: index,
derivePathType: DerivePathTypeExt.primaryFor(info.coin),
);
await mainDB.updateOrPutAddresses([address]);
}
// ========== Subclasses may override ========================================
/// To be overridden by crypto currencies that do extra address conversions
/// on top of the normal btc style address. (BCH and Ecash for example)
String convertAddressString(String address) {
return address;
}
// ========== Private ========================================================
Future<Address> _generateAddress({
required int chain,
required int index,
required DerivePathType derivePathType,
}) async {
final root = await getRootHDNode();
final derivationPath = cryptoCurrency.constructDerivePath(
derivePathType: derivePathType,
chain: chain,
index: index,
);
final keys = root.derivePath(derivationPath);
final data = cryptoCurrency.getAddressForPublicKey(
publicKey: keys.publicKey,
derivePathType: derivePathType,
);
final AddressSubType subType;
if (chain == 0) {
subType = AddressSubType.receiving;
} else if (chain == 1) {
subType = AddressSubType.change;
} else {
// TODO: [prio=low] others or throw?
subType = AddressSubType.unknown;
}
return Address(
walletId: walletId,
value: convertAddressString(data.address.toString()),
publicKey: keys.publicKey.data,
derivationIndex: index,
derivationPath: DerivationPath()..value = derivationPath,
type: data.addressType,
subType: subType,
);
}
// ========== Overrides ======================================================
@override
Future<void> updateBalance() async {
final utxos = await mainDB.getUTXOs(walletId).findAll();
final currentChainHeight = await chainHeight;
Amount satoshiBalanceTotal = Amount(
rawValue: BigInt.zero,
fractionDigits: cryptoCurrency.fractionDigits,
);
Amount satoshiBalancePending = Amount(
rawValue: BigInt.zero,
fractionDigits: cryptoCurrency.fractionDigits,
);
Amount satoshiBalanceSpendable = Amount(
rawValue: BigInt.zero,
fractionDigits: cryptoCurrency.fractionDigits,
);
Amount satoshiBalanceBlocked = Amount(
rawValue: BigInt.zero,
fractionDigits: cryptoCurrency.fractionDigits,
);
for (final utxo in utxos) {
final utxoAmount = Amount(
rawValue: BigInt.from(utxo.value),
fractionDigits: cryptoCurrency.fractionDigits,
);
satoshiBalanceTotal += utxoAmount;
if (utxo.isBlocked) {
satoshiBalanceBlocked += utxoAmount;
} else {
if (utxo.isConfirmed(
currentChainHeight,
cryptoCurrency.minConfirms,
)) {
satoshiBalanceSpendable += utxoAmount;
} else {
satoshiBalancePending += utxoAmount;
}
}
}
final balance = Balance(
total: satoshiBalanceTotal,
spendable: satoshiBalanceSpendable,
blockedTotal: satoshiBalanceBlocked,
pendingSpendable: satoshiBalancePending,
);
await info.updateBalance(newBalance: balance, isar: mainDB.isar);
}
}