cake_wallet/cw_lightning/lib/lightning_transaction_info.dart

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import 'package:bitcoin_flutter/bitcoin_flutter.dart' as bitcoin;
import 'package:bitcoin_flutter/src/payments/index.dart' show PaymentData;
import 'package:cw_bitcoin/bitcoin_amount_format.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 LightningTransactionInfo extends TransactionInfo {
LightningTransactionInfo(this.type,
{required String id,
required int height,
required int amount,
int? fee,
required TransactionDirection direction,
required bool isPending,
required DateTime date,
required int confirmations}) {
this.id = id;
this.height = height;
this.amount = amount;
this.fee = fee;
this.direction = direction;
this.date = date;
this.isPending = isPending;
this.confirmations = confirmations;
}
factory LightningTransactionInfo.fromHexAndHeader(WalletType type, String hex,
{List<String>? addresses, required int height, int? timestamp, required int confirmations}) {
final tx = bitcoin.Transaction.fromHex(hex);
var exist = false;
var amount = 0;
if (addresses != null) {
tx.outs.forEach((out) {
try {
final p2pkh = bitcoin.P2PKH(
data: PaymentData(output: out.script), network: bitcoin.bitcoin);
exist = addresses.contains(p2pkh.data.address);
if (exist) {
amount += out.value!;
}
} catch (_) {}
});
}
final date = timestamp != null
? DateTime.fromMillisecondsSinceEpoch(timestamp * 1000)
: DateTime.now();
return LightningTransactionInfo(type,
id: tx.getId(),
height: height,
isPending: false,
fee: null,
direction: TransactionDirection.incoming,
amount: amount,
date: date,
confirmations: confirmations);
}
factory LightningTransactionInfo.fromJson(
Map<String, dynamic> data, WalletType type) {
return LightningTransactionInfo(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);
}
final WalletType type;
String? _fiatAmount;
@override
String amountFormatted() =>
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'${formatAmount(bitcoinAmountToLightningString(amount: amount))} ${walletTypeToCryptoCurrency(type).title}';
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@override
String? feeFormatted() => fee != null
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? '${formatAmount(bitcoinAmountToLightningString(amount: fee!))} ${walletTypeToCryptoCurrency(type).title}'
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: '';
@override
String fiatAmount() => _fiatAmount ?? '';
@override
void changeFiatAmount(String amount) => _fiatAmount = formatAmount(amount);
LightningTransactionInfo updated(LightningTransactionInfo info) {
return LightningTransactionInfo(info.type,
id: id,
height: info.height,
amount: info.amount,
fee: info.fee,
direction: direction,
date: date,
isPending: isPending,
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;
return m;
}
}