stack_wallet/lib/wallets/wallet/impl/bitcoin_wallet.dart

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import 'package:isar/isar.dart';
import 'package:stackwallet/models/isar/models/blockchain_data/address.dart';
import 'package:stackwallet/utilities/amount/amount.dart';
import 'package:stackwallet/utilities/extensions/extensions.dart';
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import 'package:stackwallet/wallets/crypto_currency/coins/bitcoin.dart';
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import 'package:stackwallet/wallets/crypto_currency/crypto_currency.dart';
import 'package:stackwallet/wallets/wallet/intermediate/bip39_hd_wallet.dart';
import 'package:stackwallet/wallets/wallet/wallet_mixin_interfaces/coin_control_interface.dart';
import 'package:stackwallet/wallets/wallet/wallet_mixin_interfaces/electrumx_interface.dart';
import 'package:stackwallet/wallets/wallet/wallet_mixin_interfaces/paynym_interface.dart';
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import 'package:tuple/tuple.dart';
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class BitcoinWallet extends Bip39HDWallet
with ElectrumXInterface, CoinControlInterface, PaynymInterface {
@override
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int get isarTransactionVersion => 1; // TODO actually set this to 2
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BitcoinWallet(CryptoCurrencyNetwork network) : super(Bitcoin(network));
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@override
FilterOperation? get changeAddressFilterOperation =>
FilterGroup.and(standardChangeAddressFilters);
@override
FilterOperation? get receivingAddressFilterOperation =>
FilterGroup.and(standardReceivingAddressFilters);
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// ===========================================================================
@override
Future<List<Address>> fetchAddressesForElectrumXScan() async {
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final allAddresses = await mainDB
.getAddresses(walletId)
.filter()
.not()
.group(
(q) => q
.typeEqualTo(AddressType.nonWallet)
.or()
.subTypeEqualTo(AddressSubType.nonWallet),
)
.findAll();
return allAddresses;
}
// ===========================================================================
@override
Future<void> updateTransactions() async {
final currentChainHeight = await fetchChainHeight();
// TODO: [prio=med] switch to V2 transactions
final data = await fetchTransactionsV1(
addresses: await fetchAddressesForElectrumXScan(),
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currentChainHeight: currentChainHeight,
);
await mainDB.addNewTransactionData(
data
.map((e) => Tuple2(
e.transaction,
e.address,
))
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.toList(),
walletId,
);
}
@override
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Future<({String? blockedReason, bool blocked, String? utxoLabel})>
checkBlockUTXO(
Map<String, dynamic> jsonUTXO,
String? scriptPubKeyHex,
Map<String, dynamic>? jsonTX,
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String? utxoOwnerAddress,
) async {
bool blocked = false;
String? blockedReason;
if (jsonTX != null) {
// check for bip47 notification
final outputs = jsonTX["vout"] as List;
for (final output in outputs) {
List<String>? scriptChunks =
(output['scriptPubKey']?['asm'] as String?)?.split(" ");
if (scriptChunks?.length == 2 && scriptChunks?[0] == "OP_RETURN") {
final blindedPaymentCode = scriptChunks![1];
final bytes = blindedPaymentCode.toUint8ListFromHex;
// https://en.bitcoin.it/wiki/BIP_0047#Sending
if (bytes.length == 80 && bytes.first == 1) {
blocked = true;
blockedReason = "Paynym notification output. Incautious "
"handling of outputs from notification transactions "
"may cause unintended loss of privacy.";
break;
}
}
}
}
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return (blockedReason: blockedReason, blocked: blocked, utxoLabel: null);
}
@override
Amount roughFeeEstimate(int inputCount, int outputCount, int feeRatePerKB) {
return Amount(
rawValue: BigInt.from(
((42 + (272 * inputCount) + (128 * outputCount)) / 4).ceil() *
(feeRatePerKB / 1000).ceil()),
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fractionDigits: cryptoCurrency.fractionDigits,
);
}
@override
int estimateTxFee({required int vSize, required int feeRatePerKB}) {
return vSize * (feeRatePerKB / 1000).ceil();
}
//
// @override
// Future<TxData> coinSelection({required TxData txData}) async {
// final isCoinControl = txData.utxos != null;
// final isSendAll = txData.amount == info.cachedBalance.spendable;
//
// final utxos =
// txData.utxos?.toList() ?? await mainDB.getUTXOs(walletId).findAll();
//
// final currentChainHeight = await chainHeight;
// final List<UTXO> spendableOutputs = [];
// int spendableSatoshiValue = 0;
//
// // Build list of spendable outputs and totaling their satoshi amount
// for (final utxo in utxos) {
// if (utxo.isBlocked == false &&
// utxo.isConfirmed(currentChainHeight, cryptoCurrency.minConfirms) &&
// utxo.used != true) {
// spendableOutputs.add(utxo);
// spendableSatoshiValue += utxo.value;
// }
// }
//
// if (isCoinControl && spendableOutputs.length < utxos.length) {
// throw ArgumentError("Attempted to use an unavailable utxo");
// }
//
// if (spendableSatoshiValue < txData.amount!.raw.toInt()) {
// throw Exception("Insufficient balance");
// } else if (spendableSatoshiValue == txData.amount!.raw.toInt() &&
// !isSendAll) {
// throw Exception("Insufficient balance to pay transaction fee");
// }
//
// if (isCoinControl) {
// } else {
// final selection = cs.coinSelection(
// spendableOutputs
// .map((e) => cs.InputModel(
// i: e.vout,
// txid: e.txid,
// value: e.value,
// address: e.address,
// ))
// .toList(),
// txData.recipients!
// .map((e) => cs.OutputModel(
// address: e.address,
// value: e.amount.raw.toInt(),
// ))
// .toList(),
// txData.feeRateAmount!,
// 10, // TODO: ???????????????????????????????
// );
//
// // .inputs and .outputs will be null if no solution was found
// if (selection.inputs!.isEmpty || selection.outputs!.isEmpty) {
// throw Exception("coin selection failed");
// }
// }
// }
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}