cake_wallet/cw_bitcoin/lib/electrum_transaction_info.dart

237 lines
8.3 KiB
Dart

import 'package:bitcoin_base/bitcoin_base.dart';
import 'package:cw_bitcoin/address_from_output.dart';
import 'package:cw_bitcoin/bitcoin_address_record.dart';
import 'package:cw_bitcoin/bitcoin_amount_format.dart';
import 'package:cw_bitcoin/bitcoin_unspent.dart';
import 'package:cw_core/transaction_direction.dart';
import 'package:cw_core/transaction_info.dart';
import 'package:cw_core/format_amount.dart';
import 'package:cw_core/wallet_type.dart';
class ElectrumTransactionBundle {
ElectrumTransactionBundle(this.originalTransaction,
{required this.ins, required this.confirmations, this.time});
final BtcTransaction originalTransaction;
final List<BtcTransaction> ins;
final int? time;
final int confirmations;
}
class ElectrumTransactionInfo extends TransactionInfo {
List<BitcoinUnspent>? unspents;
ElectrumTransactionInfo(this.type,
{required String id,
required int height,
required int amount,
int? fee,
List<String>? inputAddresses,
List<String>? outputAddresses,
required TransactionDirection direction,
required bool isPending,
required DateTime date,
required int confirmations,
String? to,
this.unspents}) {
this.id = id;
this.height = height;
this.amount = amount;
this.inputAddresses = inputAddresses;
this.outputAddresses = outputAddresses;
this.fee = fee;
this.direction = direction;
this.date = date;
this.isPending = isPending;
this.confirmations = confirmations;
this.to = to;
}
factory ElectrumTransactionInfo.fromElectrumVerbose(Map<String, Object> obj, WalletType type,
{required List<BitcoinAddressRecord> addresses, required int height}) {
final addressesSet = addresses.map((addr) => addr.address).toSet();
final id = obj['txid'] as String;
final vins = obj['vin'] as List<Object>? ?? [];
final vout = (obj['vout'] as List<Object>? ?? []);
final date = obj['time'] is int
? DateTime.fromMillisecondsSinceEpoch((obj['time'] as int) * 1000)
: DateTime.now();
final confirmations = obj['confirmations'] as int? ?? 0;
var direction = TransactionDirection.incoming;
var inputsAmount = 0;
var amount = 0;
var totalOutAmount = 0;
for (dynamic vin in vins) {
final vout = vin['vout'] as int;
final out = vin['tx']['vout'][vout] as Map;
final outAddresses = (out['scriptPubKey']['addresses'] as List<Object>?)?.toSet();
inputsAmount += stringDoubleToBitcoinAmount((out['value'] as double? ?? 0).toString());
if (outAddresses?.intersection(addressesSet).isNotEmpty ?? false) {
direction = TransactionDirection.outgoing;
}
}
for (dynamic out in vout) {
final outAddresses = out['scriptPubKey']['addresses'] as List<Object>? ?? [];
final ntrs = outAddresses.toSet().intersection(addressesSet);
final value = stringDoubleToBitcoinAmount((out['value'] as double? ?? 0.0).toString());
totalOutAmount += value;
if ((direction == TransactionDirection.incoming && ntrs.isNotEmpty) ||
(direction == TransactionDirection.outgoing && ntrs.isEmpty)) {
amount += value;
}
}
final fee = inputsAmount - totalOutAmount;
return ElectrumTransactionInfo(type,
id: id,
height: height,
isPending: false,
fee: fee,
direction: direction,
amount: amount,
date: date,
confirmations: confirmations);
}
factory ElectrumTransactionInfo.fromElectrumBundle(
ElectrumTransactionBundle bundle, WalletType type, BasedUtxoNetwork network,
{required Set<String> addresses, required int height}) {
final date = bundle.time != null
? DateTime.fromMillisecondsSinceEpoch(bundle.time! * 1000)
: DateTime.now();
var direction = TransactionDirection.incoming;
var amount = 0;
var inputAmount = 0;
var totalOutAmount = 0;
List<String> inputAddresses = [];
List<String> outputAddresses = [];
for (var i = 0; i < bundle.originalTransaction.inputs.length; i++) {
final input = bundle.originalTransaction.inputs[i];
final inputTransaction = bundle.ins[i];
final outTransaction = inputTransaction.outputs[input.txIndex];
inputAmount += outTransaction.amount.toInt();
if (addresses.contains(addressFromOutputScript(outTransaction.scriptPubKey, network))) {
direction = TransactionDirection.outgoing;
inputAddresses.add(addressFromOutputScript(outTransaction.scriptPubKey, network));
}
}
final receivedAmounts = <int>[];
for (final out in bundle.originalTransaction.outputs) {
totalOutAmount += out.amount.toInt();
final addressExists = addresses.contains(addressFromOutputScript(out.scriptPubKey, network));
outputAddresses.add(addressFromOutputScript(out.scriptPubKey, network));
if (addressExists) {
receivedAmounts.add(out.amount.toInt());
}
if ((direction == TransactionDirection.incoming && addressExists) ||
(direction == TransactionDirection.outgoing && !addressExists)) {
amount += out.amount.toInt();
}
}
if (receivedAmounts.length == bundle.originalTransaction.outputs.length) {
// Self-send
direction = TransactionDirection.incoming;
amount = receivedAmounts.reduce((a, b) => a + b);
}
final fee = inputAmount - totalOutAmount;
return ElectrumTransactionInfo(type,
id: bundle.originalTransaction.txId(),
height: height,
isPending: bundle.confirmations == 0,
inputAddresses: inputAddresses,
outputAddresses: outputAddresses,
fee: fee,
direction: direction,
amount: amount,
date: date,
confirmations: bundle.confirmations);
}
factory ElectrumTransactionInfo.fromJson(Map<String, dynamic> data, WalletType type) {
return ElectrumTransactionInfo(
type,
id: data['id'] as String,
height: data['height'] as int,
amount: data['amount'] as int,
fee: data['fee'] as int,
direction: parseTransactionDirectionFromInt(data['direction'] as int),
date: DateTime.fromMillisecondsSinceEpoch(data['date'] as int),
isPending: data['isPending'] as bool,
confirmations: data['confirmations'] as int,
inputAddresses: data['inputAddresses'] as List<String>,
outputAddresses: data['outputAddresses'] as List<String>,
to: data['to'] as String?,
unspents: data['unspents'] != null
? (data['unspents'] as List<dynamic>)
.map((unspent) => BitcoinUnspent.fromJSON(
BitcoinSilentPaymentAddressRecord.fromJSON(unspent['address_record'].toString()),
unspent as Map<String, dynamic>))
.toList()
: null,
);
}
final WalletType type;
String? _fiatAmount;
@override
String amountFormatted() =>
'${formatAmount(bitcoinAmountToString(amount: amount))} ${walletTypeToCryptoCurrency(type).title}';
@override
String? feeFormatted() => fee != null
? '${formatAmount(bitcoinAmountToString(amount: fee!))} ${walletTypeToCryptoCurrency(type).title}'
: '';
@override
String fiatAmount() => _fiatAmount ?? '';
@override
void changeFiatAmount(String amount) => _fiatAmount = formatAmount(amount);
ElectrumTransactionInfo updated(ElectrumTransactionInfo info) {
return ElectrumTransactionInfo(info.type,
id: id,
height: info.height,
amount: info.amount,
fee: info.fee,
direction: direction,
date: date,
isPending: isPending,
inputAddresses: inputAddresses,
outputAddresses: outputAddresses,
confirmations: info.confirmations);
}
Map<String, dynamic> toJson() {
final m = <String, dynamic>{};
m['id'] = id;
m['height'] = height;
m['amount'] = amount;
m['direction'] = direction.index;
m['date'] = date.millisecondsSinceEpoch;
m['isPending'] = isPending;
m['confirmations'] = confirmations;
m['fee'] = fee;
m['to'] = to;
m['unspents'] = unspents?.map((e) => e.toJson()).toList() ?? [];
m['inputAddresses'] = inputAddresses;
m['outputAddresses'] = outputAddresses;
return m;
}
String toString() {
return 'ElectrumTransactionInfo(id: $id, height: $height, amount: $amount, fee: $fee, direction: $direction, date: $date, isPending: $isPending, confirmations: $confirmations, to: $to, unspent: $unspents)';
}
}